数值模拟技术在GW断块注聚参数优选中的应用

Application of Numerical Simulation Technique on Choose parameters for polymer injection in Block GW

通过对GW断块油藏地质特征、开发效果进行分析,研究剩余油分布规律;在水驱数值模拟研究基础上,开展水淹特征、剩余油分布特征研究,对油藏动用情况、平面和纵向剩余油分布情况进行了定量描述。结合室内试验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的层位、段塞长度及浓度、注入方式、注入速度等进行了设计和数值模拟运算,并结合开发指标预测,优选出经济效益最佳的参数组合方案,进一步改善断块开发效果,提高采收率,研究结果表明,聚合物驱增油降水效果显著,10末预计可提高采收率8.0个百分点,含水最低可降低5.1个百分点。研究结果为现场实施方案的编制提供了理论依据。

Fully study on the reservoir geological features and the effect of water flooding development of Bloch GW,remaining oil distribution law was summed up by calculating the stress field an water saturation field at the end of the stage on the basis of early water flooding numerical simulation,and quantitative analysis was made on reservoir producing an horizontal and vertical 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.Simulative calculation was conducted on horizon,volume ratio,polymer concentration,injection way,injection speed,and etc,and the economic benefit optimal parameter combination scheme was selected by the development index prediction results.The scheme can improve the development effect of fault block and improve the recovery efficiency.Research results showed that polymer flooding has a significant effect on increasing oil production and reducing water content,and oil recovery might be enhanced by 8.0%10years later,and water cut might be reduced by 5.1% at least.The results provided theoretical basis for implementation plan compiling.