油田水驱采出液硫酸盐还原菌群活性生态抑制效能及其群落演替分析研究

油田硫酸盐还原菌的大量繁殖,严重的影响了生产。研究从生态抑制的角度,运行厌氧的ABR反应器,投加生态抑菌剂,进行连续流试验。结果表明,加入生态抑制剂后,硫酸根浓度降低,产生的硫化物浓度低于0.3 mg/L以下,氧化还原电位由-300 m V变为-50 m V左右,pH值和碱度变化不大,对反应系统影响较小。生态抑制前后微生物图谱变化显著,由硫酸盐还原菌群变为以反硝化为主的功能菌群,生态抑菌剂实现了硫酸盐还原菌群的活性抑制。

Analysis of Community Succession and Inhibition Ecology Efficiency of SRB in Oilfield

Production is seriously affected in Daqing oilfield because of SRB in conventional water flooding process. In order to parabiotic inhibition,ABR reactors worked and Ecological antibacterial agents were added. The result shows that the concentra-tions of NO3-decreased,the concentrations of S2-were below 0.3 mg/L,ORP changed from-300 mv to-50 mV. pH and alka-linity had a little change with small effects on reaction system. The microorganism map was significantly changed before and after ecological inhibition. The result shows that SRB changed to the functional bacteria group mainly with denitrification. The inhibi-tion of sulfate-reducing bacteria was achieved by adding the ecological antibacterial agent.