Z11块E_2d_2油藏剩余油分布质量评价

Evaluation of Remaining Oil Distribution Quality of E 2 d 2 Reservoir in Block Z11

针对江苏油田Z11块E_2d_2油藏进入高含水阶段面临剩余油挖潜的问题,在划分不同储层类型的基础上,根据油藏数值模拟结果,分析剩余油分布规律。进一步提出利用动用难易指数和剩余储量丰度两个指标建立剩余油分布质量评价方法,根据迭代阈值法计算得到的评价指标分类界限,将剩余油分布质量分成4种类型并确定相应的挖潜方向。最后,根据Z11块E_2d_2油藏剩余油分布质量评价结果,开展剩余油挖潜的现场应用,取得了较好的调整效果。

Aiming at the problem of tapping the remaining oil in E 2 d 2 reservoir of Z11 block in Jiangsu Oilfield with high water cut,the distribution law of remaining oil was analyzed based on the classification of different reservoir types according to the results of reservoir numerical simulation.Further the evaluation method of residual oil distribution quality was established by using the two indicators of production difficulty index and residual reserve abundance.According to the classification limits of evaluation indicators calculated by iterative threshold method,the residual oil distribution quality was divided into four types and the corresponding potential tapping direction was determined.Finally,according to the evaluation results of remaining oil distribution quality of E 2 d 2 reservoir in block Z11,the field application of tapping the potential of remaining oil was carried out,and a good adjustment effect was achieved.