摘要
注水保持压力开发油田 ,当井底流压低于饱和压力以后 ,指示曲线向压力轴偏转 ,并会出现最大产量点 ;原有的IPR方程已不适用。首先以达西渗流定律为基础 ,进行因素分析 ,找出影响IPR曲线形态的各种因素 ;然后从变形介质入手 ,讨论它对IPR曲线方程的影响 ;再综合各种因素的影响 ,经数学推导 ,建立一种新型IPR曲线方程。进一步分析曲线形态随各参数的变化规律 ,并为最大产量点的求取提供了方法。这种新型的IPR方程可用于不同流动压力下油井流入动态计算 。
In the oilfield where pressure is maintained by water injection, when the bottom hole pressure is below the saturation pressure, the inflow performance curve is deflected toward pressure axis and the maximum production point occurs on the curve. As such, the old inflow performance relationship (IPR) is no longer valid. On the basis of Darcy's low, this paper firstly analyzes the factors that influence the shape of the inflow performance curve, and then discusses the influence of deformable porous medium on IPR formula, and finally establishes a new equation of inflow performance curve of oil well. Furthermore, the regularity of changes of the curve shape with individual parameters is probed, and method for calculating the maximum oil production point is provided. Analysis shows that the equation theoretically explains the deflection and the maximum oil production point, and that it can be used to predict inflow behavior of oil well under different flowing pressures.
出处
《西南石油学院学报》
CSCD
2003年第4期30-33,共4页
Journal of Southwest Petroleum Institute
基金
四川省青年基金项目 ( 2 85)
关键词
变形介质
采油指数
油井动态
IPR曲线
deformable porous media
productivity index
oil well performance
bottom hole pressure
Inflow Performance Relationship
