Affiliation:
1. Department of Geology, State Key Laboratory of Continental Dynamics, Northwest University, Xi’an 710069, China
2. Department of Food and Nutrition Engineering, Shaanxi Normal University, Xi’an 710119, China
3. College of Food Science and Technology, Northwest University, Xi’an 710069, China
Abstract
Microbialenhanced oil recovery has gained more attention in recent years due to its low cost and eco-friendliness. However, studies on the application of this technique in the low-permeability reservoirs are few. In this study, eight strains from the Ordos Basin low-permeability reservoir that produce biosurfactant and reduce viscosity were identified. Strains could produce biosurfactants (lipopeptide and glycolipids) to emulsify the oil and had good tolerance on temperature (25°C-50°C), salinity (1 g/L-50g/L), and pH (5-10). After the actions of A-3, SC4534(2), SC4561, and JSC4535, the content of long-chain n-alkanes were decreased by 51.2%, 28.3%, 35.2%, and 28.9%, respectively. The naphthalene in aromatic hydrocarbons was also effectively degraded by the strains that were screened, and the degradation rate was higher than 84%. Additionally, all strains were able to reduce oil viscosity, which was reduced by 27-51% (in seven days). 16S rRNA gene sequencing analysis indicated that seven strains belong to the genus Bacillus and one belongs to the genus Rhodospirillaceae. The results revealed that the existence of high-efficiency strains that can significantly improve the properties of crude oil in low-permeability oil fields though biodegradation and use of biosurfactants, which is of great significance for the application of MEOR in low-permeability oil fields.
Subject
Energy Engineering and Power Technology,Fuel Technology,Nuclear Energy and Engineering,Renewable Energy, Sustainability and the Environment
Reference46 articles.
1. Technical advancements in enhanced oil recovery in low permeability reservoirs of Yanchang oilfield;X. Z. Wang;Petroleum Geology and Recovery Efficiency,2022
2. Development of the theory and technology for low permeability reservoirs in China;W. R. Hu;Petroleum Exploration and Development,2018
3. Review on microbial enhanced oil recovery: Mechanisms, modeling and field trials
4. Microbial enhanced oil recovery, a critical review on worldwide implemented field trials in different countries
5. Non-syntrophic methanogenic hydrocarbon degradation by an archaeal species
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献