变形三重介质低渗透油藏三渗模型流动特征  

Flow Characteristics of Triple-permeability Model in Low Permeability Reservoir with Deformed Triple Porosity Medium

作　　者：同登科[1] 刘文超[1] 薛莉莉 

机构地区：[1]中国石油大学(华东)数学与计算科学学院,东营257061 [2]英国赫瑞.瓦特大学石油工程系

出　　处：《力学季刊》2010年第3期334-341,共8页Chinese Quarterly of Mechanics

基　　金：国家高科技研究发展计划(863)项目(2006AA06Z236);山东自然科学基金资助项目(Y2007F13)

摘　　要：不仅考虑低渗透油藏具有启动压力梯度的渗流特征,还考虑应力敏感地层中介质的变形,引入渗透率模数表达介质变形对渗透率的影响,建立了变形三重介质低渗透油藏的三渗数学模型。鉴于数学模型的强非线性,采用全隐的有限差分格式求得该模型的数值解,并将数值结果绘制成试井样板曲线。最后,还讨论了启动压力梯度、渗透率模数以及三重介质参数对无因次井底压力动态的敏感性影响。Considering both the flow characteristics that there existed start-up pressure gradient in the low permeability reservoir and the medium deformation in the stress-sensitive formation, the triple permeabil- ity mathematical model for the fluid flow in the low permeability reservoir with deformed triple-porosity medium was constructed. And the permeability modulus was introduced to express the effect of the deformation of the medium on the permeability. Owing to the strong nonlinearity of the mathematical model, the fully implicit finite difference schemes were adopted to obtain its numerical solution. Relying on these numerical results, the typical well test curves were plotted. Finally, the dynamic sensitive effects of the start-up pressure gradient, the permeability modulus and parameters of the triple-porosity medium on the dimensionless wellbore pressure were discussed.

关 键 词：三重介质 压敏效应 低渗透 启动压力梯度 井筒储集 表皮效应 

分 类 号：TE312[石油与天然气工程—油气田开发工程]