Study on Enhancing Oil Recovery by Indigenous Microorganisms in a Heavy Oil Reservoir

Qing Feng Cui; Li Na Yi; Han Ping Dong

doi:10.4028/www.scientific.net/AMR.807-809.2624

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 807-809Study on Enhancing Oil Recovery by Indigenous...

Study on Enhancing Oil Recovery by Indigenous Microorganisms in a Heavy Oil Reservoir

Abstract:

The feasibility of enhancing oil recovery in Xinjiang oilfield with heavy oil reservoir was studied. The results showed that main microbial populations in the reservoir were saprophytic, hydrocarbon-oxidizing, nitrate-reducing bacteria, sulfate-reducing bacteria, and fermentative. Given optimized carbon and nitrogen sources, the indigenous microorganisms generated gases, which mostly were CO₂, and amount of gases could reach 1.3 times volume as nutrient solution. The effect of MEOR was evaluated by a sand pack experiment, and the oil recovery was 9.5%. The test with the injection of nutrient and air was carried out. Field performance monitoring and product ion tracking results showed: 1the indigenous microorganisms were activated with the number increased 2-3, and microbial population structure changed apparently; 2The content of CO₂ and CH₄in the gas of oil well changed slightly; 3the properties formation water were changed, the content of HCO₃^-in formation water varied greatly, and emulsion were found. 4Although Indigenous Microbial Flooding Technology may be a potential technique for the development of oilfields, that biogas generated by microbes is not the primary mechanism of Indigenous Microbial Flooding Technology is determined.

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Periodical:

Advanced Materials Research (Volumes 807-809)

Pages:

2624-2628

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.807-809.2624

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Online since:

September 2013

Authors:

Qing Feng Cui, Li Na Yi, Han Ping Dong

Keywords:

Enhancing Oil Recovery, Heavy Oil, Indigenous Microorganism

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