聚合物驱数值模拟技术在庄一断块的应用

Application of Polymer Flooding Numerical Simulation Technique in Block Zhuang 1

充分了解庄一断块油藏地质特征,研究油气水分布规律,在前期水驱数值模拟研究计算出末阶段压力场和含水饱和度场的基础上,全面研究工区水淹特征及剩余油分布状况,对油藏动用情况及平面、纵向上的剩余油分布进行了定量分析。结合实验室数据和油田生产数据对影响聚合物驱开发效果的参数进行了优化研究,应用聚合物驱数值模拟技术对注聚合物层位、井网,以及注入孔隙体积、聚合物浓度、注入方式、注入速度等注入参数分别进行了模拟计算,并对开发指标进行预测,优选出效果最佳、经济效益最好的参数组合,以进一步改善断块的开发效果,提高最终采收率。模拟结果显示,聚合物驱10年末预计可提高采收率6.89%,含水最低可降低20个百分点,增油降水效果显著。模拟结果为矿场试验方案的编制提供了理论依据。

Fully understanding the reservoir geological features of Block Zhuangl, remaining oil distribution law was summed up by calculating the stress field and water saturation field at the end of the stage on the basis of early water flood- ing numerical simulation, and quantitative analysis was made on reservoir producing and horizontal and vertical remaining oil distribution in the study area. Meanwhile, selective study was carried out on the parameters influencing polymer flooding development effect on the basis of experimental data and oilfield production data. Simulative calculation was conducted on horizon, well pattern, volume ratio, polymer concentration, injection way, injection speed, and etc, and the best assem- blage was selected. Parameters simulation results showed that oil recovery might be enhanced by 6. 89% 10 years later, and water cut might be reduced by 20% at least, increasing oil production and reducing water production remarkably. The results provided theoretical basis for mining plan compiling.