中高温油藏内源微生物驱油现场试验

摘要

针对胜利油田中高温油藏地质、开发情况及内源微生物群落特点，从中高温（55～85℃）油藏605个单元中选定沾3块为目标油藏区块，采用现场分阶段、逐步推进的方式实施微生物驱油试验。现场试验跟踪分析效果表明，对应油井产量从38．9 t／d升高到86．9 t／d，含水率从93．8％下降到89．1％；截至2016年3月，累计增油3．76万t，阶段提高采收率1．73％。沾3块油藏内源微生物被有效激活，油藏微生物多样性显著降低，与现场动态变化吻合。%Based on the geological conditions and development history of high temperature reservoir in ShengLi OilField and the community characteristics of the indigenous microorganisms, Zhan 3 was screened from 605 well block in medium and high temperature reservoir. Field test was carried out by stages.Tracking analysis showed that oil well yield was up to 86. 9 t/d from original 38. 9 t/d and the water cut decrease to 89. 1% from original 93. 8%. Up to March 2016, cumulative incremental oil production of Zhan 3 has been more than 3. 76×104 t,the current recovery increase has been 1. 73%. Endogenous microorganism was activated in Zhan 3 reservoir. Microbial community diversity was reduced evidently.It was tie in with the performance of oil production and injection wells.