文25东块微球乳液调驱室内模拟研究

针对中原油田文25东块含水率高及采收率低的问题,进行了微球乳液调驱的室内模拟研究。考察了段塞注入量、段塞组合方式、注入速率及注入浓度对采收率提高值的影响。最终确定了最佳注入方案,浓度为0.3%表面活性剂与0.5%聚合物微球乳液以1:1交替注入,段塞注入量为0.5 PV,注入速率为0.5 mL/min。

Laboratory simulation of Microsphere Emulsion Profile Control and Displacement in Wen-25 East Block

Aiming at the problem of high water cut and low oil recovery in Wen-25 east block of Zhongyuan oilfield,the laboratory simulation of microsphere emulsion flooding was carried out.The influence of slug injection amount,slug combination mode,injection rate and injection concentration on recovery efficiency was investigated.The optimal injection pattern was determined as follows:0.3％ surfactant and 0.5％ polymer microsphere emulsion were injected alternately according to the ratio of 1∶ 1,the injection volume of slug was 0.5PV and the injection rate was 0.5 mL/min.