激活地层本源微生物提高稠油采收率

以地层微生物地化活动的活化作用为基础的提高石油采收率生物技术，在大港孔店油田做了先导性试验（2001～2004年）。微生物的活化作用是通过注水井循环导入充气水和补充含N，P的矿物盐而获得的。这项生物技术的使用引起地层微生物的活化，这个活化首先是在注水井的近井底区域，接着是在沿着水动力学方向一致的区域进行。第一阶段，需氧烃降解微生物的活性增加，导致地层水碳酸氢盐和乙酸盐含量的增加；第二阶段，在缺氧区域甲烷产生菌被激活。本源MEOR先导性试验表明，地层水中的微生物指标与生产井的产量有关，通过试验多采出16000余吨原油。

Enhanced Viscous Oil Recovery by Activating Indigenous Microorganism

The microbiologic technique for enhanced oil recovery, which is based on the geochemistry activity of indigenous microorganisms, pilot testes hed been made during the period from 2001 to 2004 in Kongdian area of Dagang Oilfield. Its activation is obtained by injecting aerated water and compensating mineral salt containing nitrate and phosphate through injection wells. The technique induces the microorganisms activating, which is taken place in nearby injectors first, and then performed on the area along the direction of hydrodynamics. At the first stage, the activation of oxygen-hydrocarbon degrading microbes are reduced, which results in the increase of hydrocarbonate and acetic acid; at the second stage, the methanogenic bacteria are activated in the anaerobic regions. The indigenous MEOR pilot test indicates that the microbial indexes in formation water are related with the production in producing wells. In the study more than 16000 ton of crude oil are produced.