三重介质油藏有限导流垂直裂缝井的流-固耦合模型  

THE FLUID-SOLID COUPLING MODEL OF FINITE CONDUCTIVITY VERTICALLY FRACTURED WELL IN THE RESERVOIR WITH TRIPLE POROSITY MEDIUM

作　　者：刘文超[1] 姚军[1] 

机构地区：[1]中国石油大学(华东)石油工程学院,青岛266555

出　　处：《工程力学》2013年第3期402-409,共8页Engineering Mechanics

基　　金：国家重点基础研究发展计划("973"计划)项目(2011CB201004);国家科技重大专项项目(2011ZX05014-005-003HZ)

摘　　要：考虑了三重介质油藏介质变形与垂直裂缝井闭合的影响,推广了Cinco-Ley H的有限导流垂直裂缝井的双线性渗流理论,将流体在垂直裂缝井与地层中形成的渗流划分为两个区域:三重介质油藏中的非线性流动区域和垂直裂缝井内的非线性流动区域;由此建立了三重介质油藏有限导流垂直裂缝井的流-固耦合模型。鉴于该模型的强非线性,采用稳定的有限差分格式求得其数值解,并将数值结果绘制成试井样板曲线。将数值结果与不考虑介质变形或垂直裂缝闭合的模型进行对比验证了该文模型研究的必要性。另外,还讨论了垂直裂缝井渗透率模量、窜流系数、基岩弹性储容比、井筒储集系数对无因次井底压力及压力导数的敏感性影响。Considering the effect of media deformation in the reservoir with triple porosity media and the closure of the vertically fractured well, this paper developed Cinco-Ley H＇s bilinear flow theory of finite conductivity vertically fractured wells. The seepage flow in the vertically fractured well and formation was divided into two regions： the nonlinear flow region in the reservoir with triple-porosity medium and the nonlinear flow region in the vertically fractured well. And then the fluid-solid coupling model of finite conductivity vertically fractured well in the reservoir with triple porosity medium was constructed. Due to the model＇s strong nonlinearity, stable finite difference schemes were adopted to obtain its numerical solutions. Typical west test curves were plotted by using the numerical results. Comparison of the numerical results with those from models without consideration of media deformation or closure of the vertically fractured well verified the necessity of the research on the proposed model. Besides, the sensitive effects of permeability modulus of vertically fractured wells, interporosity flow factor, elastic storage capacity ratio of matrix and wellbore storage coefficient towards the dimensionless wellbore pressure and its derivative were discussed.

关 键 词：三重介质 垂直裂缝井 流-固耦合 有限差分 非线性 

分 类 号：TE312[石油与天然气工程—油气田开发工程] TE319