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| Change of biological features and its impact on flooding effect of indigenous MEOR in Zhan3 block |
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HU Jing1, CAO Gongze1, WANG Wenjie2, WU Xiaoling1, CAO Yanbin1, WANG Weidong1, TANG Cunzhi3
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(1.Petroleum Engineering Technology Research Institute, Shengli Oilfield Company, SINOPEC, Dongying 257067, China;2.Huangdao Zhiyuan Middle School of Qingdao, Qingdao 266510, China;3.Research Institute of Production Technology,Hekou Oil Production Factory, Shengli Oilfield Company, SINOPEC, Dongying 257200, China)
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| Abstract: |
| The oil recovery is increased using the indigenous microorganism flooding through specific indigenous microorganisms by injecting nutrients. The microbial community structure and the dynamic changes of the dominant bacterium in the production liquid of microbial flooding in Zhan3 block of Shengli Oilfield were analyzed, through which the relationship between the biological features and the dynamic changes of production performance was studied. It is found that there exits clear correlation between microbial diversity, dominant bacteria content and the oil production performance. A significant negative correlation is observed between the microbial diversity and the oil production. And the oil production is affected directly by the alternative synergism of 4 dominant bacteria. It is also found that a significant positive correlation exists between the content of dominant bacteria and oil production. And the change of oil production lags behind the change of the biological features. |
| Key words: indigenous microorganism flooding biological features dominant bacteria |
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