变形三重介质低渗透油藏双渗流动模型  

Dual-percolation model of low permeability reservoir with deformed triple media

作　　者：刘文超[1] 张世明[2] 刘晓燕[1] 王君[2] 

机构地区：[1]中国石油大学,山东东营257061 [2]中石化胜利油田分公司,山东东营257015

出　　处：《特种油气藏》2010年第3期73-76,共4页Special Oil & Gas Reservoirs

基　　金：国家重大专项“裂缝性碳酸盐岩油藏开发关键技术”(2008ZX05014-004)

摘　　要：低渗透油藏具有启动压力梯度,不仅考虑其渗流特征,还考虑应力敏感地层中介质的变形,建立变形三重介质低渗透油藏双渗流动模型。引入渗透率模数表达介质变形对渗透率的影响,结合低渗透情形下的非达西运动定律,推导出裂缝、溶洞与基岩同时发生形变、裂缝和溶洞同时向井筒供液的双渗流动数学模型,并求解,根据数值结果绘制试井样板曲线,同时对油藏参数进行了敏感性分析。A dual-percolation model of low permeability reservoir with deformed triple media has been constructed with consideration of threshold pressure gradient,flow characteristics and media deformation in the stress-sensitive formation of low permeability reservoir.Permeability modulus has been introduced to represent the effect of media deformation on permeability.A dual-percolation mathematical model is built by combining with the non-Darcy law under low permeability condition for simultaneous deformation of fractures,cave and matrix and simultaneous fluid supplying into wellbore from both fractures and cave.The model is solved and a type curve of well testing is plotted according to the numerical results.Moreover,a sensitivity analysis is conducted for reservoir parameters.

关 键 词：三重介质 变形 非达西渗流 低渗透油藏 井筒储集 表皮效应 试井 

分 类 号：TE312[石油与天然气工程—油气田开发工程]