Microorganisms of the carbonate petroleum reservoir 302 of the Romashkinskoe oilfield and their biotechnological potential
详细信息    查看全文
文摘
Diversity, geochemical activity, and biotechnological potential of the microorganisms from oil bed 302 of the Romashkinskoe oilfield (Tatarstan, Russia) are reported. The microbial community contained almost no aerobic microorganisms. Sulfate-reducing (103?06 cells/mL) and fermentative bacteria (102?05 cells/mL) predominated in the oilfield. Sulfate reduction was the predominant process in formation water with the rates up to 26.6 μg S2?/sup>L/day. The number of methanogens and methanogenesis rate in formation water did not exceed 104 cells/mL and 8.19 μg CH4 L/day, respectively. Analysis of the 16S rRNA gene clone library revealed the sequences of denitrifying bacteria of the genera Sulfurimonas and Thauera. The oil recovery technique combining the stimulation of fermentative bacteria and suppression of sulfate reducers in the oilfield was proposed for development of the bed 302. Fermentative bacteria could be activated by the traditional method, i.e., injection of molasses and nitrogen and phosphorus mineral salts through the injection wells. Introduction of high concentrations of nitrate will activate the growth of denitrifying bacteria, suppress the growth of sulfidogenic bacteria, and result in decreased sulfide concentration in formation water. The proposed biotechnology is technologically simple and environmentally friendly.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700