动边界层状低渗透油藏试井分析  

Well Test Analysis on Layered Low-Permeability Reservoir with Moving Boundary

作　　者：任胜利[1] 

机构地区：[1]中海油田服务股份有限公司,河北廊坊065201

出　　处：《油气井测试》2015年第3期8-11,14,共5页Well Testing

基　　金：国家重大科技专项"大型油气田及煤层气开发--海上稠油热采新技术"(2011ZX05024)资助

摘　　要：低渗透油气藏中常出现低速非达西渗流。对于层状低渗油气藏,层间非均质性一般较强,考虑非均质性的影响,可以把层状油藏的渗透区域看作双渗透油藏。充分考虑启动压力梯度与动边界的影响,建立微可压缩双渗透油藏低速非达西渗流有效井径试井的数学模型,求出其数值解,绘制有界油藏定压条件下层间储容比和层间窜流系数影响的典型试井曲线,对动边界的传播规律进行分析。本文方法可用于其它油藏类型(如双重介质等)试井分析图版的创建。Low velocity non-Darcy penetration always exits in low-permeability reservoirs. For layered low-permeability reservoirs,interlayer heterogeneity is always strong and the permeable area in layered reservoirs can be simplified as double penetration reservoirs considering the influence of interlayer heterogeneity. A mathematic model of double penetration reservoir is built based on the low velocity non-Darcy flow theory fully considering the impact of start-up pressure gradient and moving boundary and whose numerical solution is obtained.Typical well testing curves influenced by interlayer storage capacity ratio and coefficient of interlayer channeling are plotted under stable pressure condition in boundary reservoirs,and the spread rule of flow boundary is also analyzed.

关 键 词：层状低渗透油气藏 非达西流动 动边界 数学模型 试井曲线 

分 类 号：TE353[石油与天然气工程—油气田开发工程]