alexa Composite Microbial Oil Displacement Agent Enhanced Oil Recovery In Changqing Oilfield, PR China
ISSN:2157-7463

Journal of Petroleum & Environmental Biotechnology
Open Access

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2nd World Congress on Petroleum and Refinery
June 01-03, 2017 Osaka, Japan

Wang Xingbiao and Huang Zhiyong
Chinese Academy of Sciences, China
ScientificTracks Abstracts: J Pet Environ Biotechnol
DOI: 10.4172/2157-7463-C1-028
Abstract
Crude oil recovery technologies were unable to meet the growing energy demand in China. Microbial Enhanced Oil Recovery (MEOR) was one of the most effective recovery methods for the oil fields. Biosurfactant in oil degradation and emulsification changed the solid oil into liquid oil to be exploited. This was the most important mechanism of MEOR technology, but because of the complex geological conditions of different oil reservoir types, the microorganisms used in petroleum recovery lack enough environmental adaptability. Several high environmental adaptive capacity microfloras were screened, which withstand high temperature (30-80°C), salinity (NaCl concentration of 5-20%, w/v) and pH (5-9). Produced biosurfactant withstand 10-90°C, pH 5-12, NaCl concentration 1-20% (w/v). Further fermentation process optimization was carried out, and the active metabolites including bioemulsifiers, biosurfactants, acids and alcohol showed good potential for application. This can greatly improve the oil remaining after waterflood recovery from 11.55% to 30.78% by physical model. A variety of active microfloras which form a complex system can reduce the surface tension, improve emulsifying activity and emulsion stability. The surface tension (less than 30 mN/m) and emulsifying activity (more than 60%) were maintained at a strong level, better emulsification activity for crude oil can be maintained for more than 120 h, which showed potential industrial application. The composite microbial oil displacement agent with nutrients and trace elements has been injected into the oil well in Changqing Oilfield. Results showed that oil production of the low yielding well (0.2 T/day) was improved more than 3 times, the produced liquid water content decreased by more than 75%, from 85% reduced to 25%, oil recovery is improved by 5-8 times, from 0.15 T/d to 0.9 T/d.
Biography

Wang Xingbiao has his expertise in microbial degradation of petroleum hydrocarbon and metabolites analysis. His open and contextual evaluation model is based on mechanism of hydrocarbon degradation and metabolism. After years of experience in research, application, administration both in laboratory and oil well and oil polluted sites. His main work focused on microbial enhanced oil recovery and crude oil pollution management, and has improved the oil recovery more than 4 oil wells, increased 200 tons of oil extraction. Cumulatively, another important application work was reducing heavy oil in soil from 21.0% to 0.2% (w/w) in the oily sludge treatment, and the annual output value was more than 3 million US dollars in 3 oilfields of China.

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