新疆石油地质

新疆石油地质 ›› 1997, Vol. 18 ›› Issue (1): 67-69.

• 油藏工程 • 上一篇    下一篇

种计算平均毛管压力曲线的方法

缪志伟   

  1. 新疆石油管理局勘探开发研究院 克拉玛依 834000
  • 收稿日期:1996-10-03 发布日期:2021-01-18
  • 作者简介:缪志伟,高级工程师 油藏工程

A METHOD FOR DETERMINING AVERAGE CAPILLARY PRESSURE CURVE

Miao Zhiwei   

  1. Research Institute of Exploration and Development, Xinjiang Petroleum Administration Bureau, Karamay 834000
  • Received:1996-10-03 Published:2021-01-18
  • About author:Miao Zhiwei, Senior Engineer, Reservoir Engineering

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摘要： 根据Brooks R H和Corey A T建立的毛管压力同阈压之比(Pc/Pe)与有效湿相饱和度$s_{wt}^{*}$之间的统计公式提出一种计算平均毛管压力曲线的方法。该方法经夏子街油田压汞毛管压力曲线数据验算,曲线形态良好。与传统方法相比,方法简便,计算精度高,易于在微机上实现。该方法同时给出平均毛管压力曲线的数学表达式及其孔隙度大小分布指数λ,这对扩大毛管压力曲线的应用很有意义。

关键词: 毛细管压力, 曲线, 压力, 饱和度, 线性, 回归分析

Abstract: According to the statistics formula between the ratio of capillary pressure to threshold pressure (Pc/Pe) and the efective wetting phase saturation($s_{wt}^{*}$) established by Brooks R.H. and Corey A.T, the method for determining average capillary pressure curve is presented in this paper. It is checked with the data of mercury injection capillary pressure of Xiazijie oilfield and the shape of curve is satisfactory. As compared with that of the traditional J-function, this method is simple, convenient, high-precision and easy to operate on PC. Meanwhile, a mathmatical expression for average capillary pressure curve and porosity size distribution exponent λ also put forward. It is of great significance to extend: the application of capillary pressure curve.

Key words: Capillary Pressure, Curve, Pressure, Saturation, Linear, Regression analysis