空气辅助微生物驱油技术  

Research of air assisted microbial flooding technology

作　　者：魏斌[1] 赵凤敏[1] 李基昌[2] 毕爱文[2] 李国兵[2] 

机构地区：[1]胜利油田公司采油工艺研究院,山东东营257000 [2]胜利油田公司河口采油厂,山东东营257200

出　　处：《石油钻采工艺》2006年第5期46-49,共4页Oil Drilling & Production Technology

基　　金：国家"十五"科技攻关项目"极端微生物石油开采技术"(2003BA613A-08)研究课题部分成果

摘　　要：为改善兼性厌氧微生物在高温、高压、厌氧油藏条件下的驱油性能,对微生物驱现场试验区油藏流体中筛选的兼性厌氧菌株开展优化研究,分别从模拟发酵系统和物理模拟试验2方面研究溶氧条件优化对厌氧环境条件下兼性厌氧菌株代谢及驱油性能的改善。研究表明,在适度溶氧条件下,发酵液菌体密度、代谢产物浓度明显增高,溶氧参数在4.0mg/L时,培养液相对最快达到对数生长期,进一步试验确定出兼性厌氧微生物BS36培养最佳溶氧量为4.2mg/L。物理模拟试验表明,空气辅助条件下微生物驱最终采收率比单一微生物驱提高5.5个百分点。现场实施工艺配套研究基础上,进入现场试验获得成功,进一步提高微生物驱现场试验效果。To better the field application effect of facultative anaerobic biological flooding under extremely high temperature, pressure and anaerobic oil reservoir, experiments were conducted to optimize the facultative anaerobic microorganisms. Study was conducted from both simulated ferment system and physical analogue experiments, to optimize the metaboly and oil driving capacity of the bacteria under aerobic circumstance. The study shows that the concentration of thalli and metabolic product is obviously higher under modesty aerobic circumstance than that of anaerobic circumstances. When the oxygen concentration was about 4.0 mg/L, the culture solution could reach the logarithm vegetation period with the shortest time. By further experiments, the optimum oxygen concentration was ascertained to be 4.2 mg/L for BS36 bacteria. The core flooding experiment also showed that air assisted microbial flooding could improve the recovery rate over single MEOR by 5.5. The field tests also testified that this new technology could improve the recovery rate over single MEOR.

关 键 词：兼性厌氧微生物 厌氧环境 微生物驱 室内试验 矿场试验 提高采收率 

分 类 号：TE357.9[石油与天然气工程—油气田开发工程] TE357.7