A novel way to enhance the oil recovery ratio by Streptococcus sp BT-003

作者：Xu, Tao; Chen, Chang; Liu, Chunqiao; Zhang, Shurong; Wu, Ying; Zhang, Peng^*

来源：Journal of Basic Microbiology, 2009, 49(5): 477-481.

DOI：10.1002/jobm.200800345

• Streptococcus sp.
• Crude oil
• Microbial enhanced oil recovery (MEOR)
• Emulsification
• Viscosity reduction

Degrading hydrocarbon by Streptococcus sp. BT-003 as a kind of microbe for oil recovery was analyzed in this paper. The Streptococcus sp. BT-003 showed that it could use crude oil as the sole source of carbon and produce organic acid, bio-gas and polysaccharide which were propitious to emulsify and reduce the viscosity of crude oil. After cultivating 8-14 h, the viscosity of crude oil reduced from 8000-15000 mPa . s to 50-250 mPa . s. The content of organic acid increased 8-15 times, and carbon dioxide and polysaccharide reached 55 ml/l and 8 g/l respectively. Paraffin and resin reduced by 60-95%, and light components increased obviously. Fluid rheology was better than before, the interfacial tension between the crude oil and water were reduced effectively.

• 出版日期2009-10
• 单位北京化工大学