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油气开采中岩石力学参数变化规律试验研究

石油钻采工艺

2002年 24卷第4期

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Title

EXPERIMENTAL STUDY ON THE CHANGING TENDENCY OF ROCK MECHANICS PARAMETERS IN OIL GAS PRODUCTION

作者

张传进鲍洪志路保平

Authors

Zhang Chuanjin Bao Hongzhi Lu Baoping

单位

中石化勘探开发研究院, 山东德州 253005 中石化新星石油公司, 北京 100081

摘要

应用三轴应力试验装置,在模拟不同地层条件下的石油开采过程中,进行了大量的岩心试验,应用统计理论方法分别找出孔隙压力、含油水饱和度对岩石性质的影响规律,建立了特定地层条件下的岩石力学特性动态计算模型。结果表明,杨氏模量、抗压强度、比奥特系数与有效围压的关系均为幂律指数型;杨氏模量、抗压强度与含水饱和度的关系均为对数型。此结论为预测石油开采过程中岩石力学性质变化规律奠定了基础。

Abstract

By using the tri axial stress testing instruments, and simulating the production process in different formation conditions, vast amount of core tests are conducted to try to discover the influencing tendency of such factors as formation pore pressure and oil contained water saturation on rock characteristics, with the help of statistic theory. A dynamic model is established for calculating the rock mechanics characteristics in specified formation conditions. Testing results show that the correlations between Young’s modulus, compressing strength, Biot coefficient and the effective surrounding pressure are all of power law exponent; while the correlations between that of Young’s modulus, compressing strength and water saturation are all of logarithm. This study sets a foundation for predicting the changing tendency of rock mechanics characteristics in oil production.

关键词：

油田开采; 岩石力学; 力学试验; 变化规律; 模型;

Keywords:

oil recovery; rock mechanics; mechanical experiment; changing tendency; model;

基金项目

DOI

10.3969/j.issn.1000-7393.2002.04.011