沾3区块内源微生物驱油现场试验

Field pilot test of indigenous iiiicrobial flooding in Block Zhan-3

针对胜利油田沾3区块水驱效果差、稳产难度大的状况,开展了内源微生物驱油技术研究。通过室内激活实验,获得了针对性的激活剂,物模驱油实验能提高采收率7%以上。在此基础上,开展了现场驱油试验。结果表明,激活剂在油藏中具有良好的激活性能,油藏内源微生物被大量激活,并取得良好的驱油效果,对应油井日产油量由试验前的2.5 t/d上升至14.0t/d,含水由试验前的95.0%下降至74.4%。

In consideration with the poor walerflooding result and difficulty for stable production in Block Zhan-3,Shengli oilfield,a study on indigenous microbial flooding technology is conducted.From lab activation experiment,a case- specific activator is developed with an EOR enhancement over 7%obtained in the physical model.On this basis,a field pilot is carried on.It is indicated from the result that the activator has good activation function in the oil reservoir,the indigenous microorganisms are significanlly activated and goad flooding result is achieved.The well oil production increases from 2.5 t/d prior to pilot to 14 t/d and water cut decreases from 95%prior to pilot to 74.4%.