高含水期油田堵调综合治理方法

以孤东油田八区 5- 6层系为研究对象 ,提出了一套高含水期油田以注水井调剖为中心、辅以油井堵水的堵调综合治理方法。利用模糊综合决策方法优选最佳的堵调措施井 ,设计了最佳的工艺参数 ,并根据油水井的生产特征实施了不同堵剂组合的堵调工艺措施。矿场试验结果表明 ,所有措施水井的视吸水指数下降 ,压力指数上升 ,吸水剖面明显改善。对应的油井含水率下降 ,日产油量上升 ,水驱开发效果有所改善 ,原油采收率提高了 5.5%。

A COMPREHENSIVE METHOD OF WATER INJEC-TION PROFILE CONTROL AND WATER SHUT OFF IN PRODUCTION WELL WITH HIGH WATER CUT

A method of water injection profile control is combined with water shut off in prooduction well for the oilfield in high water cut period. The comprehensive method was applied in 5 6 unit of Gudong region. The wells for profile control and water shut off are selected based on the fuzzy theory. The process parameters are designed based on the corresponding expert system. Based on the producing and injection behaviors, the technology of agent combination is adapted to the formation condition. After the project is carried out, the apparent injectivity indices of the treated injection well are reduced. The injection profile is improved. The water cut of corresponding production well decreases, and the oil production rate increases. It is indicated that this set of technology is effective for improving water flooding effect of oilfield in high water cut period.