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Microbial diversity in long-term water-flooded oil reservoirs with different in situ temperatures in China.


ABSTRACT: Water-flooded oil reservoirs have specific ecological environments due to continual water injection and oil production and water recycling. Using 16S rRNA gene clone library analysis, the microbial communities present in injected waters and produced waters from four typical water-flooded oil reservoirs with different in situ temperatures of 25 °C, 40 °C, 55 °C and 70 °C were examined. The results obtained showed that the higher the in situ temperatures of the oil reservoirs is, the less the effects of microorganisms in the injected waters on microbial community compositions in the produced waters is. In addition, microbes inhabiting in the produced waters of the four water-flooded oil reservoirs were varied but all dominated by Proteobacteria. Moreover, most of the detected microbes were not identified as indigenous. The objective of this study was to expand the pictures of the microbial ecosystem of water-flooded oil reservoirs.

SUBMITTER: Zhang F 

PROVIDER: S-EPMC3478584 | biostudies-literature | 2012

REPOSITORIES: biostudies-literature

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Microbial diversity in long-term water-flooded oil reservoirs with different in situ temperatures in China.

Zhang Fan F   She Yue-Hui YH   Chai Lu-Jun LJ   Banat Ibrahim M IM   Zhang Xiao-Tao XT   Shu Fu-Chang FC   Wang Zheng-Liang ZL   Yu Long-Jiang LJ   Hou Du-Jie DJ  

Scientific reports 20121023


Water-flooded oil reservoirs have specific ecological environments due to continual water injection and oil production and water recycling. Using 16S rRNA gene clone library analysis, the microbial communities present in injected waters and produced waters from four typical water-flooded oil reservoirs with different in situ temperatures of 25 °C, 40 °C, 55 °C and 70 °C were examined. The results obtained showed that the higher the in situ temperatures of the oil reservoirs is, the less the effe  ...[more]

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