Study on distribution of reservoir endogenous microbe and oil displacement mechanism.
In order to research oil displacement mechanism by indigenous microbial communities under reservoir conditions, indigenous microbial flooding experiments using the endogenous mixed bacterium from Shengli Oilfield were carried out. Through microscopic simulation visual model, observation and analysis of distribution and flow of the remaining oil in the process of water flooding and microbial oil displacement were conducted under high temperature and high pressure conditions. Research has shown that compared with atmospheric conditions, the growth of the microorganism metabolism and attenuation is slowly under high pressure conditions, and the existence of the porous medium for microbial provides good adhesion, also makes its growth cycle extension. The microbial activities can effectively launch all kinds of residual oil, and can together with metabolites, enter the blind holes off which water flooding, polymer flooding and gas flooding can't sweep, then swap out remaining oil, increase liquidity of the crude oil and remarkably improve oil displacement effect.
School of Civil and Resources Engineering, University of Science & Technology Beijing, Beijing 100083, China.
Ming
M
Yue
School of Civil and Resources Engineering, University of Science & Technology Beijing, Beijing 100083, China.
Weiyao
W
Zhu
School of Civil and Resources Engineering, University of Science & Technology Beijing, Beijing 100083, China.
Zhiyong
Z
Song
Innovation Application Institute, Zhejiang Ocean University, Zhoushan 316022, China.
Yunqian
Y
Long
School of Civil and Resources Engineering, University of Science & Technology Beijing, Beijing 100083, China.
Hongqing
H
Song
Displacement mechanism; Endogenous microbes; Microbial communities; Microbial enhanced oil recovery; Porous media