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has been cited by the following article:

• TITLE: Relationship between Microbial Community Characteristics and Flooding Efficiency in Microbial Enhanced Oil Recovery

  AUTHORS: Gangzheng Sun, Jing Hu, Qiongyao Chen, Zihui Chen, Weidong Wang, Qin Qian, Feng Han, Ling Li, Yuesheng Li

  KEYWORDS: Microbial Enhanced Oil Recovery (MEOR), Nutrient Concentration, Bacterial Concentration, Methanogens, Microbial Activity

  JOURNAL NAME: Advances in Bioscience and Biotechnology, Vol.13 No.5, May 30, 2022

  ABSTRACT: Microbial enhanced oil recovery (MEOR) is the research focus in the field of energy development as an environmentally friendly and low cost technology. MEOR can bes divided into indigenous microbial oil recovery and exogenous microbial oil recovery. The ultimate goal of indigenous microbial flooding is to enhance oil recovery via stimulation of specific indigenous microorganisms by injecting optimal nutrients. For studying the specific rule to activate the indigenous community during the long-term injection period, a series of indigenous displacement flooding experiments were carried out by using the long-core physical simulation test. The experimental results have shown that the movement of nutrients components (i.e., carbon/nitrogen/phosphorus) differed from the consumption of them. Moreover, there was a positive relationship between the nutrients concentration and bacteria concentration once observed in the produced fluid. And the trend of concentration of acetic acid was consistent with that of methanogens. When adding same activators, the impacts of selective activators to stimulate the indigenous microorganisms became worse along with the injection period, which led to less oil recovery efficiency.