<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<SAMPLE_SET>
    <SAMPLE alias="DRS037745" center_name="PKU" accession="DRS037745">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023727</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-08-10</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>628.17md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>122.0787 E 41.1252 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>A12J63-115-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>A12J63-115-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>70??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>5682.00mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1041.22mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1652-2176m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>7.5</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: An12 block,Liaohe oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037746" center_name="PKU" accession="DRS037746">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023728</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-08-10</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>122.0787 E 41.1252 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>A12J63-15W-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>A12J63-15W-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>7422.00mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>978.14mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>7.5</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: An12 block,Liaohe oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037747" center_name="PKU" accession="DRS037747">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023729</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-08-10</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>628.17md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>122.0787 E 41.1252 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>A12J63-515-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>A12J63-515-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>70??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>9240.00mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1065.39mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1652-2176m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>7.5</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: An12 block,Liaohe oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037748" center_name="PKU" accession="DRS037748">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023730</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-08-10</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>628.17md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>122.0787 E 41.1252 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>A12J64-016-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>A12J64-016-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>70??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>4865.00mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>837.84mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1652-2176m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>7.5</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: An12 block,Liaohe oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037749" center_name="PKU" accession="DRS037749">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023731</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-08-10</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>628.17md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>122.0787 E 41.1252 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>A12J64-018-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>A12J64-018-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>70??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>6003.00mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1032.89mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1652-2176m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>7.5</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: An12 block,Liaohe oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037750" center_name="PKU" accession="DRS037750">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023732</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-12-03</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>699.09md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>116.9651 E 45.5078 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>B18-25-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>B18-25-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>58.4??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>116.70mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1585.89mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.19</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1446-1539m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.53</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Ba19 block,Huabei oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037751" center_name="PKU" accession="DRS037751">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023733</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-12-03</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>699.09md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>116.9651 E 45.5078 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>B18-35-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>B18-35-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>58.4??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>104.20mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1352.54mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.19</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1446-1539m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>9.04</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Ba19 block,Huabei oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037752" center_name="PKU" accession="DRS037752">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023734</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-12-03</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>699.09md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>116.9651 E 45.5078 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>B18-37-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>B18-37-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>58.4??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>146.50mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1578.78mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.19</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1446-1539m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>9.04</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Ba19 block,Huabei oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037753" center_name="PKU" accession="DRS037753">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023735</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-12-03</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>699.09md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>116.9651 E 45.5078 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>B18-43-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>B18-43-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>58.4??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>157.00mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1458.82mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.19</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1446-1539m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>9.26</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Ba19 block,Huabei oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037754" center_name="PKU" accession="DRS037754">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023736</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-12-03</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>699.09md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>116.9651 E 45.5078 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>B18-44-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>B18-44-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>58.4??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>100.60mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1405.76mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.19</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1446-1539m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>9.11</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Ba19 block,Huabei oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037755" center_name="PKU" accession="DRS037755">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023737</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-12-03</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>699.09md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>116.9651 E 45.5078 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>B18-45-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>B18-45-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>58.4??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>111.20mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1600.07mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.19</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1446-1539m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.44</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Ba19 block,Huabei oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037756" center_name="PKU" accession="DRS037756">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023738</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-12-03</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>699.09md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>116.9651 E 45.5078 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>B18-52-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>B18-52-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>58.4??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>122.70mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1496.98mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.19</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1446-1539m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.31</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Ba19 block,Huabei oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037757" center_name="PKU" accession="DRS037757">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023739</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-12-03</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>116.9651 E 45.5078 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>BLW-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>BLW-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>38.53mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1268.00mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.44</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Ba19 block,Huabei oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037758" center_name="PKU" accession="DRS037758">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023740</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>117.4962 E 38.7302 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>D6-14-2W-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>D6-14-2W-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>55.75mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>4404.09mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Yangerzhuang block,Dagang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037759" center_name="PKU" accession="DRS037759">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023741</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>3795.34md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>117.4962 E 38.7302 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>D6-15-3-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>D6-15-3-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>58??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>62.09mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>4491.28mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.33</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1563.3-1632m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.01</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Yangerzhuang block,Dagang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037760" center_name="PKU" accession="DRS037760">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023742</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>3795.34md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>117.4962 E 38.7302 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>D7-14-1-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>D7-14-1-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>58??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>52.58mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>4649.99mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.33</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1563.3-1632m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>7.91</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Yangerzhuang block,Dagang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037761" center_name="PKU" accession="DRS037761">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023743</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>3795.34md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>117.4962 E 38.7302 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>D7-17KB-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>D7-17KB-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>58??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>65.37mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1978.77mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.33</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1563.3-1632m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.08</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Yangerzhuang block,Dagang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037762" center_name="PKU" accession="DRS037762">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023744</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>3795.34md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>117.4962 E 38.7302 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>DB7-17-3-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>DB7-17-3-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>58??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>46.78mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>3256.49mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.33</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1563.3-1632m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>7.62</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Yangerzhuang block,Dagang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037763" center_name="PKU" accession="DRS037763">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023745</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-12-03</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>688.96md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>115.4003 E 42.5628 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>M-J1-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>M-J1-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>37??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>120.27mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1301.00mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>790-830m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.38</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Menggulin block,Huabei oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037764" center_name="PKU" accession="DRS037764">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023746</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-12-03</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>688.96md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>115.4003 E 42.5628 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>M14-8-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>M14-8-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>37??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>106.90mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1447.16mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>790-830m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.66</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Menggulin block,Huabei oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037765" center_name="PKU" accession="DRS037765">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023747</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-12-03</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>115.4003 E 42.5628 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>M16-10W-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>M16-10W-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>52.66mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1004.08mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.63</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Menggulin block,Huabei oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037766" center_name="PKU" accession="DRS037766">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023748</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-12-03</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>688.96md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>115.4003 E 42.5628 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>M16-11-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>M16-11-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>37??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>89.80mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>976.23mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>790-830m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.2</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Menggulin block,Huabei oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037767" center_name="PKU" accession="DRS037767">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023749</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-12-03</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>688.96md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>115.4003 E 42.5628 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>M16-9-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>M16-9-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>37??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>51.73mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1099.59mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>790-830m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.39</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Menggulin block,Huabei oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037768" center_name="PKU" accession="DRS037768">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023750</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-12-03</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>688.96md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>115.4003 E 42.5628 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>M17-10-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>M17-10-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>37??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>118.10mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1076.06mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>790-830m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.31</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Menggulin block,Huabei oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037769" center_name="PKU" accession="DRS037769">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023751</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2009-12-03</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>688.96md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>115.4003 E 42.5628 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>M18-9-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>M18-9-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>37??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>59.65mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1021.54mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>790-830m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Menggulin block,Huabei oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037770" center_name="PKU" accession="DRS037770">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023752</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-12-21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N-DQW-10A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water about one month during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N-DQW-10A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037771" center_name="PKU" accession="DRS037771">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023753</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2013-02-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N-DQW-11A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water about two monthes during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N-DQW-11A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037772" center_name="PKU" accession="DRS037772">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023754</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2013-04-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N-DQW-12A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water about three monthes during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N-DQW-12A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037773" center_name="PKU" accession="DRS037773">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023755</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2013-05-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N-DQW-13A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water about one month after the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N-DQW-13A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037774" center_name="PKU" accession="DRS037774">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023756</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-08-26</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N-DQW-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N-DQW-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>120.20mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>2256.99mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.16</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037775" center_name="PKU" accession="DRS037775">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023757</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-08-30</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N-DQW-2A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N-DQW-2A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037776" center_name="PKU" accession="DRS037776">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023758</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-05-22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N-DQW-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water about one month after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N-DQW-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037777" center_name="PKU" accession="DRS037777">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023759</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-06-22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N-DQW-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water about two monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N-DQW-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037778" center_name="PKU" accession="DRS037778">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023760</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-07-23</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N-DQW-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water about three monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N-DQW-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037779" center_name="PKU" accession="DRS037779">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023761</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-08-22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N-DQW-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water about four monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N-DQW-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037780" center_name="PKU" accession="DRS037780">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023762</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-09-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N-DQW-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water about five monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N-DQW-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037781" center_name="PKU" accession="DRS037781">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023763</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-11-23</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N-DQW-9A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water about the first day during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N-DQW-9A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037782" center_name="PKU" accession="DRS037782">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023764</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-12-21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P139-10A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>control production water about one month during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P139-10A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037783" center_name="PKU" accession="DRS037783">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023765</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2013-02-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P139-11A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>control production water about two monthes during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P139-11A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037784" center_name="PKU" accession="DRS037784">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023766</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-05-22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P139-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>control production water about one month after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P139-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037785" center_name="PKU" accession="DRS037785">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023767</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-06-22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P139-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>control production water about two monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P139-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037786" center_name="PKU" accession="DRS037786">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023768</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-07-23</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P139-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>control production water about three monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P139-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037787" center_name="PKU" accession="DRS037787">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023769</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-08-22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P139-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>control production water about four monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P139-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037788" center_name="PKU" accession="DRS037788">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023770</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-09-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P139-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>control production water about five monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P139-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037789" center_name="PKU" accession="DRS037789">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023771</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-10-25</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P139-8A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>control production water about six monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P139-8A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037790" center_name="PKU" accession="DRS037790">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023772</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-11-23</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P139-9A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>control production water about the first day during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P139-9A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037791" center_name="PKU" accession="DRS037791">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023773</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-12-21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P140-10A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about one month during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P140-10A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037792" center_name="PKU" accession="DRS037792">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023774</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2013-02-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P140-11A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about two monthes during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P140-11A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037793" center_name="PKU" accession="DRS037793">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023775</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2013-04-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P140-12A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about three monthes during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P140-12A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037794" center_name="PKU" accession="DRS037794">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023776</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-08-26</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P140-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P140-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>84.64mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1948.05mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.08</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037795" center_name="PKU" accession="DRS037795">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023777</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-08-30</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P140-2A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P140-2A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037796" center_name="PKU" accession="DRS037796">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023778</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-06-22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P140-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about two monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P140-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037797" center_name="PKU" accession="DRS037797">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023779</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-07-23</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P140-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about three monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P140-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037798" center_name="PKU" accession="DRS037798">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023780</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-08-22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P140-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about four monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P140-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037799" center_name="PKU" accession="DRS037799">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023781</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-11-23</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P140TH1-9A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about the first day during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P140TH1-9A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037800" center_name="PKU" accession="DRS037800">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023782</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-11-26</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P140TH2-26-9(2)A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about three days during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P140TH2-26-9(2)A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037801" center_name="PKU" accession="DRS037801">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023783</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-12-21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P141-10A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about one month during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P141-10A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037802" center_name="PKU" accession="DRS037802">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023784</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2013-02-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P141-11A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about two monthes during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P141-11A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037803" center_name="PKU" accession="DRS037803">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023785</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2013-04-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P141-12A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about three monthes during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P141-12A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037804" center_name="PKU" accession="DRS037804">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023786</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2013-05-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P141-13A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about one month after the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P141-13A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037805" center_name="PKU" accession="DRS037805">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023787</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-08-26</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P141-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P141-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>98.73mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1948.26mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>7.68</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037806" center_name="PKU" accession="DRS037806">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023788</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-08-30</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P141-2A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P141-2A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037807" center_name="PKU" accession="DRS037807">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023789</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-05-22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P141-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about one month after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P141-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037808" center_name="PKU" accession="DRS037808">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023790</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-06-22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P141-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about two monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P141-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037809" center_name="PKU" accession="DRS037809">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023791</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-07-23</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P141-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about three monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P141-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037810" center_name="PKU" accession="DRS037810">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023792</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-08-22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P141-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about four monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P141-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037811" center_name="PKU" accession="DRS037811">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023793</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-09-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P141-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about five monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P141-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037812" center_name="PKU" accession="DRS037812">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023794</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-10-25</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P141-8A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about six monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P141-8A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037813" center_name="PKU" accession="DRS037813">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023795</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-11-23</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-2-P141-9A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about the first day during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-2-P141-9A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037814" center_name="PKU" accession="DRS037814">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023796</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-12-21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D2-P40-10A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about one month during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D2-P40-10A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037815" center_name="PKU" accession="DRS037815">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023797</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2013-02-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D2-P40-11A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about two monthes during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D2-P40-11A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037816" center_name="PKU" accession="DRS037816">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023798</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2013-04-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D2-P40-12A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about three monthes during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D2-P40-12A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037817" center_name="PKU" accession="DRS037817">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023799</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2013-05-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D2-P40-13A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about one month after the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D2-P40-13A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037818" center_name="PKU" accession="DRS037818">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023800</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-08-26</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D2-P40-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D2-P40-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>106.3mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>2019.26mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.31</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037819" center_name="PKU" accession="DRS037819">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023801</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-05-22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D2-P40-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about one month after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D2-P40-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037820" center_name="PKU" accession="DRS037820">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023802</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-06-22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D2-P40-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about two monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D2-P40-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037821" center_name="PKU" accession="DRS037821">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023803</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-07-23</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D2-P40-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about three monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D2-P40-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037822" center_name="PKU" accession="DRS037822">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023804</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-08-22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D2-P40-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about four monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D2-P40-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037823" center_name="PKU" accession="DRS037823">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023805</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-09-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D2-P40-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about five monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D2-P40-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037824" center_name="PKU" accession="DRS037824">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023806</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-10-25</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D2-P40-8A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about six monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D2-P40-8A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037825" center_name="PKU" accession="DRS037825">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023807</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-11-23</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D2-P40-9A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (adopted displacement recovery) about the first day during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D2-P40-9A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037826" center_name="PKU" accession="DRS037826">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023808</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-12-21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D3-P40-10A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about one month during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D3-P40-10A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037827" center_name="PKU" accession="DRS037827">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023809</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2013-02-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D3-P40-11A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about two monthes during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D3-P40-11A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037828" center_name="PKU" accession="DRS037828">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023810</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2013-04-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D3-P40-12A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about three monthes during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D3-P40-12A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037829" center_name="PKU" accession="DRS037829">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023811</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2013-05-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D3-P40-13A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about one month after the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D3-P40-13A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037830" center_name="PKU" accession="DRS037830">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023812</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-08-26</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D3-P40-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D3-P40-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>78.92mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>1611.45mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>7.93</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037831" center_name="PKU" accession="DRS037831">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023813</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-11-25</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D3-P40-25-9(2)A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about two days during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D3-P40-25-9(2)A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037832" center_name="PKU" accession="DRS037832">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023814</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-11-26</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D3-P40-26-9(2)A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about three days during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D3-P40-26-9(2)A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037833" center_name="PKU" accession="DRS037833">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023815</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-11-27</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D3-P40-27-9(2)A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about four days during the second field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D3-P40-27-9(2)A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037834" center_name="PKU" accession="DRS037834">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023816</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-08-30</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D3-P40-2A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D3-P40-2A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037835" center_name="PKU" accession="DRS037835">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023817</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-05-22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D3-P40-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about one month after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D3-P40-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037836" center_name="PKU" accession="DRS037836">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023818</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-06-22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D3-P40-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about two monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D3-P40-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037837" center_name="PKU" accession="DRS037837">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023819</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-07-23</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D3-P40-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about three monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D3-P40-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037838" center_name="PKU" accession="DRS037838">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023820</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-08-22</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D3-P40-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about four monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D3-P40-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037839" center_name="PKU" accession="DRS037839">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023821</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-09-24</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D3-P40-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about five monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D3-P40-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037840" center_name="PKU" accession="DRS037840">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023822</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-10-25</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>2006.08md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>125.0156 E 46.6025 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>N2-D3-P40-8A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (not only adopted displacement recovery, but also huff and puff in a single well) about six monthes after the first field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>N2-D3-P40-8A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>44.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1155-1207m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Naner block,Daqing oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037841" center_name="PKU" accession="DRS037841">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023823</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-11</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>85.4544E E 5.3653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Q409W-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Q409W-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>35.79mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>6378.32mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.63</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Qizhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037842" center_name="PKU" accession="DRS037842">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023824</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-11</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>277.61md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>85.4544E E 5.3653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Q7203-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Q7203-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>32??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>41.50mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>4875.89mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.17</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1088m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.18</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Qizhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037843" center_name="PKU" accession="DRS037843">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023825</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-11</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>277.61md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>85.4544E E 5.3653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Q72121-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Q72121-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>32??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>53.78mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>3730.80mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.17</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1088m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.18</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Qizhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037844" center_name="PKU" accession="DRS037844">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023826</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-11</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>277.61md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>85.4544E E 5.3653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Q72122-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Q72122-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>32??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>49.18mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>5294.41mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.17</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1088m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.13</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Qizhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037845" center_name="PKU" accession="DRS037845">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023827</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-11</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>277.61md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>85.4544E E 5.3653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Q7222-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Q7222-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>32??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>30.22mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>5764.56mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.17</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1088m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.26</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Qizhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037846" center_name="PKU" accession="DRS037846">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023828</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-11</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>277.61md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>85.4544E E 5.3653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Q7291A-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Q7291A-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>32??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>32.83mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>4713.80mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.17</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1088m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.16</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Qizhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037847" center_name="PKU" accession="DRS037847">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023829</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-11</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6038W-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6038W-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>65.43mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>5744.11mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.45</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037848" center_name="PKU" accession="DRS037848">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023830</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-09-08</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6038W-2A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water about 14 days from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6038W-2A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037849" center_name="PKU" accession="DRS037849">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023831</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-11-27</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6038W-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water about three monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6038W-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037850" center_name="PKU" accession="DRS037850">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023832</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-03-08</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6038W-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water about seven monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6038W-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037851" center_name="PKU" accession="DRS037851">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023833</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-05-29</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6038W-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water about nine monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6038W-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037852" center_name="PKU" accession="DRS037852">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023834</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-07-26</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6038W-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water about 11 monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6038W-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037853" center_name="PKU" accession="DRS037853">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023835</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-03-30</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6038W-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water about 19 monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6038W-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037854" center_name="PKU" accession="DRS037854">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023836</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-11</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6073-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6073-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>63.32mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>5504.05mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.01</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037855" center_name="PKU" accession="DRS037855">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023837</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-09-08</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6073-2A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about 14 days from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6073-2A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037856" center_name="PKU" accession="DRS037856">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023838</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-11-27</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6073-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about three monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6073-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037857" center_name="PKU" accession="DRS037857">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023839</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-03-08</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6073-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about seven monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6073-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037858" center_name="PKU" accession="DRS037858">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023840</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-05-29</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6073-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about nine monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6073-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037859" center_name="PKU" accession="DRS037859">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023841</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-07-26</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6073-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about 11 monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6073-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037860" center_name="PKU" accession="DRS037860">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023842</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-03-30</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6073-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about 19 monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6073-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037861" center_name="PKU" accession="DRS037861">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023843</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-11</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6180-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6180-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>113.4mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>4069.46mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>7.81</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037862" center_name="PKU" accession="DRS037862">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023844</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-09-08</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6180-2A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about 14 days from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6180-2A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037863" center_name="PKU" accession="DRS037863">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023845</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-11-27</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6180-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about three monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6180-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037864" center_name="PKU" accession="DRS037864">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023846</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-03-08</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6180-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about seven monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6180-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037865" center_name="PKU" accession="DRS037865">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023847</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-05-29</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6180-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about nine monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6180-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037866" center_name="PKU" accession="DRS037866">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023848</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-07-26</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6180-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about 11 monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6180-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037867" center_name="PKU" accession="DRS037867">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023849</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-03-30</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6180-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about 19 monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6180-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037868" center_name="PKU" accession="DRS037868">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023850</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-03-08</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6189-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about seven monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6189-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037869" center_name="PKU" accession="DRS037869">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023851</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-05-29</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6189-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about nine monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6189-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037870" center_name="PKU" accession="DRS037870">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023852</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-07-26</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6189-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about 11 monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6189-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037871" center_name="PKU" accession="DRS037871">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023853</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-03-30</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6189-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about 19 monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6189-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037872" center_name="PKU" accession="DRS037872">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023854</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-11</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6190-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6190-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>61.63mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>5625.19mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.68</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037873" center_name="PKU" accession="DRS037873">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023855</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-09-08</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6190-2A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about 14 days from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6190-2A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037874" center_name="PKU" accession="DRS037874">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023856</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-11-27</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6190-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about three monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6190-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037875" center_name="PKU" accession="DRS037875">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023857</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-03-08</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6190-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about seven monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6190-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037876" center_name="PKU" accession="DRS037876">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023858</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-05-29</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6190-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about nine monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6190-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037877" center_name="PKU" accession="DRS037877">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023859</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-07-26</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6190-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about 11 monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6190-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037878" center_name="PKU" accession="DRS037878">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023860</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2012-03-30</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6190-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about 19 monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6190-7A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037879" center_name="PKU" accession="DRS037879">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023861</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-11</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6197-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6197-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>67.43mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>4212.00mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.15</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037880" center_name="PKU" accession="DRS037880">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023862</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-03-08</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6197-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about seven monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6197-4A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037881" center_name="PKU" accession="DRS037881">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023863</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-05-29</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6197-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about nine monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6197-5A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037882" center_name="PKU" accession="DRS037882">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023864</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-07-26</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>472.14md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>84.8544E E 5.9653N N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>T6197-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water about 11 monthes from the beginning of field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>T6197-6A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>20.6??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.21</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>480-515m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Liuzhong block,Xinjiang oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037883" center_name="PKU" accession="DRS037883">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023865</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-18</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z-YNW-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z-YNW-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>72.25mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>7516.51mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>7.34</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037884" center_name="PKU" accession="DRS037884">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023866</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-18</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>911.86md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-13-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-13-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>60??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>58.01mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>6648.88mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1240-1360m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.01</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037885" center_name="PKU" accession="DRS037885">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023867</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-18</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>911.86md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-14-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-14-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>60??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>101.60mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>7902.63mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1240-1360m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>7.89</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037886" center_name="PKU" accession="DRS037886">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023868</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-18</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>911.86md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-18-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-18-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>60??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>185.40mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>6186.81mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1240-1360m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.34</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037887" center_name="PKU" accession="DRS037887">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023869</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-18</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>911.86md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-26-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-26-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>60??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>88.21mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>6942.08mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1240-1360m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.28</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037888" center_name="PKU" accession="DRS037888">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023870</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-10-08</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>911.86md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-26-2-1 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (huff and puff in a single well, R=0 m) about one day after field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-26-2-1 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>60??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1240-1360m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037889" center_name="PKU" accession="DRS037889">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023871</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-10-08</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>911.86md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-26-2-2 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (huff and puff in a single well, R=1 m) about one day after field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-26-2-2 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>60??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1240-1360m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037890" center_name="PKU" accession="DRS037890">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023872</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-10-08</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>911.86md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-26-2-3 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (huff and puff in a single well, R=2 m) about one day after field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-26-2-3 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>60??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1240-1360m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037891" center_name="PKU" accession="DRS037891">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023873</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-10-08</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>911.86md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-26-2-4 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (huff and puff in a single well, R=3 m) about one day after field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-26-2-4 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>60??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1240-1360m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037892" center_name="PKU" accession="DRS037892">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023874</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-10-12</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>911.86md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-26-2-5 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (huff and puff in a single well) about five days after field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-26-2-5 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>60??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1240-1360m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037893" center_name="PKU" accession="DRS037893">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023875</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-10-18</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>911.86md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-26-2-6 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (huff and puff in a single well) about 11 days after field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-26-2-6 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>60??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1240-1360m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037894" center_name="PKU" accession="DRS037894">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023876</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-10-28</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>911.86md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-26-2-7 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (huff and puff in a single well) about 21 days after field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-26-2-7 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>60??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1240-1360m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037895" center_name="PKU" accession="DRS037895">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023877</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-18</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-N12W-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-N12W-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>58.76mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>7275.37mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>7.32</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037896" center_name="PKU" accession="DRS037896">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023878</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-01-13</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-N12W-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water (huff and puff in a single well) about one day after field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-N12W-3A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037897" center_name="PKU" accession="DRS037897">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023879</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-18</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>911.86md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-X24-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-X24-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>60??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>83.97mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>6558.26mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1240-1360m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>7.98</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037898" center_name="PKU" accession="DRS037898">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023880</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-01-13</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>911.86md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-X24-3-1 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (huff and puff in a single well) about one day after field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-X24-3-1 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>60??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1240-1360m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037899" center_name="PKU" accession="DRS037899">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023881</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-01-14</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>911.86md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-X24-3-2 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (huff and puff in a single well) about two days after field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-X24-3-2 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>60??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1240-1360m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037900" center_name="PKU" accession="DRS037900">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023882</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-01-16</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>911.86md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-X24-3-3 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (huff and puff in a single well) about four days after field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-X24-3-3 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>60??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1240-1360m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037901" center_name="PKU" accession="DRS037901">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023883</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-01-20</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>911.86md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-X24-3-4 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (huff and puff in a single well) about eight days after field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-X24-3-4 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>60??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1240-1360m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037902" center_name="PKU" accession="DRS037902">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023884</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2011-01-28</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>911.86md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-X24-3-5 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water (huff and puff in a single well) about 16 days after field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-X24-3-5 A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>60??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1240-1360m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037903" center_name="PKU" accession="DRS037903">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023885</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-18</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>permeability</TAG>
                <VALUE>911.86md</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-X27-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>production water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-X27-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>water_temp_regm</TAG>
                <VALUE>60??C</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>production well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>production water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>101.90mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>6614.82mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>porosity</TAG>
                <VALUE>0.3</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>depth</TAG>
                <VALUE>1240-1360m</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.03</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
    <SAMPLE alias="DRS037904" center_name="PKU" accession="DRS037904">
        <IDENTIFIERS>
            <PRIMARY_ID label="BioSample ID">SAMD00023886</PRIMARY_ID>
        </IDENTIFIERS>
        <SAMPLE_NAME>
            <TAXON_ID>885331</TAXON_ID>
            <SCIENTIFIC_NAME>oil production facility metagenome</SCIENTIFIC_NAME>
        </SAMPLE_NAME>
        <SAMPLE_ATTRIBUTES>
            <SAMPLE_ATTRIBUTE>
                <TAG>collection_date</TAG>
                <VALUE>2010-05-18</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>project_name</TAG>
                <VALUE>Archaeal communities in water flooding oil reservoirs of China</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>lat_lon</TAG>
                <VALUE>118.4925 E 37.4668 N</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_name</TAG>
                <VALUE>Z3-X28W-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_feature</TAG>
                <VALUE>injection water before field test</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>sample_title</TAG>
                <VALUE>Z3-X28W-1A</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>description</TAG>
                <VALUE>injection well</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>bioproject_id</TAG>
                <VALUE>PRJDB3381</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_material</TAG>
                <VALUE>injection water</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>org_carb</TAG>
                <VALUE>48.58mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>env_biome</TAG>
                <VALUE>oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>samp_salinity</TAG>
                <VALUE>7741.05mg/L</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>ph</TAG>
                <VALUE>8.19</VALUE>
            </SAMPLE_ATTRIBUTE>
            <SAMPLE_ATTRIBUTE>
                <TAG>geo_loc_name</TAG>
                <VALUE>China: Zhan3 block,Shengli oil field</VALUE>
            </SAMPLE_ATTRIBUTE>
        </SAMPLE_ATTRIBUTES>
    </SAMPLE>
</SAMPLE_SET>
