用交错网格建立气水两相数值试井模型  

Establishing Numerical Testing Model with Gas and Water Two-Phase by Staggered-Mesh

作　　者：胡勇[1] 钟兵[1] 杨雅和[1] 

机构地区：[1]西南油气田分公司勘探开发研究院

出　　处：《油气井测试》2001年第3期10-14,共5页Well Testing

基　　金：中国石油天然气集团公司"95"重点科技攻关项目 (编号 :970 5 0 6-2 )"气水井试井分析方法研究"的部分内容

摘　　要：数值试井是解决复杂地层中多相流试井问题的有效手段。本文考虑复杂地层天然气开发过程中井筒气水两相流动和地层气水两相渗流等对试井分析的影响 ,建立了气水两相地层 /井筒两相组合数学模型。在对井筒微分方程进行离散时 ,采用交错网格离散井筒气水两相流动的动量守恒方程 ,解决了常规网格导致的不合理压力场问题 ,为模型的求解奠定了良好的基础。实例计算结果表明 ,交错网格的应用是成功的。Numerical test is an effective way to solve testing problems with multiphase flow of complicated formations.Considered the influence to testing analysis from gas and water two-phase flow of well bore and percolation of formation in the gas development process of complicated layers.The paper has established a mathematical model with two-phase combination of formation and well bore of gas,water two-phase.During the process of dispersing the differential equation of well bore,it is momentum conservation equation by use of staggered-mesh to disperse gas and water two-phase flow of well bore that solves the problem of unreasonable pressure field caused by conventional mesh which lays a foundation for solution of the model.Calculation results of practical case indicated that the application of it is successful.

关 键 词：交错网格 试井 气井 含水两相 数学模型 天然气 

分 类 号：TE373[石油与天然气工程—油气田开发工程]