天然气在复杂气藏内渗流问题的新模型及应用  

A NEW MODEL AND ITS APPLICATION IN SEEPAGE FLOW PROBLEMS OF NATURAL GAS IN COMPLICATED GAS RESERVOIR

作　　者：赵子刚[1] 姚力[2] 马水龙[3] 

机构地区：[1]大庆石油学院 [2]大庆石油管理局第八采油厂 [3]大庆石油管理局第三采油厂

出　　处：《大庆石油地质与开发》1999年第6期21-24,共4页Petroleum Geology & Oilfield Development in Daqing

摘　　要：针对形成不同流体区域的气藏、有边水气藏、岩性尖灭气藏及井底存在污染或改善的气藏等情况， 建立了考虑井筒相态重分布的复杂气藏的渗流新模型， 求出了３ 种典型外边界条件下的气藏拟压力分布解析解， 并绘出了井底压降曲线。给出的气藏无量纲压力表达式及压降曲线， 还可适用于凝析气井及井筒带积液的气井。结合实例分析给出了本文理论在油田开发中的应用。This paper established a new model for the seepage flow in complicated gas reservoir considering wellbore phase state redistribution in accordance with gas reservoirs in various fluid areas such as edge water reservoirs, lithologic pinchout reservoirs and reservoirs with pollution or improvement in bottom hole. It obtains reservoir pseudopressure distribution analytic solution under 3 kinds of typical external boundary condition, and plots the bottom hole pressure drop curves. The given reservoir dimensionless pressure express formula and pressure drop curves can be used in condensate gas wells and the gas wells with accumulated fluid in bottom hole. Case analysis gives its application in oil field development.

关 键 词：天然气藏渗流 复杂气藏 压降曲线 气井 井筒 

分 类 号：TE312[石油与天然气工程—油气田开发工程] TE373