Abstract: In addition to being a restriction to flow,the large scale impermeable subregions in a reservoir occupy a significant reservoir volume.These regions may be shale lense or artificially introduced in an EOR like process,such as polymer flooding.This paper considers the unsteady state flow behavior in a composite reservoir with an impermeable subregion by using Boundary Element Method(BEM).The pressure and pressure derivative response of a well produced at a constant rate is studied and a large scal impermeable region can be detected by the transient pressure data.

摘要： 油藏中大范围局部不渗透区除了限制流体的流动外,还占有一定的油层体积.这些区域可能是天然的页岩透镜体,也可能是在EOR方法中注入聚合物人为所致.本文考虑这种复合油藏的渗流问题并提出边界元(BEM)分析方法.利用BEM方法研究局部不渗透区外的生产井不稳定压力及其压力导效响应特征,从而可以借助于不稳定试井资料,分析和测试大范围不渗透区的存在.

关键词: 不稳定压力分析, 试井, [局部不渗透区], 边界元, 积分方程