聚合物驱油藏剩余油潜力分析及压裂时机确定

Potential Analysis of Remaining Oil and Confirmation of Fracturing Opportunity in Polymer Flooding Reservoirs

萨尔图油层目前已进入高含水阶段,聚驱后剩余油分布情况及聚驱开发过程中生产井压裂时机的选择是亟待解决的问题.通过数值模拟方法分析了研究区的潜力分布情况,同时针对高含水期聚驱油藏,分别在见效初期、含水低值和含水回升三个阶段进行压裂措施开发效果预测,确定了注聚过程中的压裂最佳时机为含水低值阶段.为高含水期聚驱油藏开发过程中剩余油挖潜措施提供了技术支持,同时对矿场压裂措施的实际应用具有指导意义.

Nowadays, Saertu reservoirs have already entered the development phase of high water cut. The distribution of remaining oil after polymer flooding and the option of fracturing opportunity of production wells during polymer flooding development are still difficult issues to be solved. In this paper, numerical simulation method can be used to analyze the distribution of remaining oil of the area. Aiming at polymer flooding reservoirs at high water cut stage, fracturing measures can be taken in three stages： early stage of response time, low value stage of water cut and increasing stage of water cut. The development effect can be predicted and the best fracturing opportunity can be determined, which provide technical support for tapping the potential of remaining oil during the development of polymer flooding reservoirs at high water cut stage. The study also has some guidance for field application of fracturing measures.