测井技术2017，Vol.41Issue(6)：642-647,6.DOI:10.16489/j.issn.1004-1338.2017.06.003
高温高压下地应力对电阻率影响实验研究
Experimental Study of the Stress Effect on Formation Resistivity under High Temperature and High Pressure
王伟 1夏宏泉 1王谦2
作者信息
- 1. 西南石油大学油气藏地质及开发工程国家重点实验室,四川成都 610500
- 2. 中国石油集团测井有限公司,陕西西安 710077
- 折叠
摘要
Abstract
The tight sandstone reservoir in the cretaceous Bashijiqik formation of crusty region is in a state of high temperature and high pressure and high stress .Crustal stress has significant effect on formation resistivity , as a result , there are many possible explanations to the identification of reservoir fluid properties by resistivity logging curves .Therefore ,it is necessary to analyze the effect of stress on resistivity .In this paper we carried out an experiment to study the relationship between resistivity and anisotropy coefficient of rock with changing horizontal stress difference when the rock is under high temperature and high pressure and two different kinds of loading mode :the confining pressure is greater than the axial pressure but less than the axial pressure . The results are as follows :Within the elastic deformation , the rock resistivity increases in the form of e exponent with the increase of the horizontal stress difference ;The resistivity ,which has obvious directional characteristics , varies with the pressure along the direction of pressure ,the resistivity change is small ,and in vertical direction ,the variation of resistivity is large ;The resistivity anisotropy coefficient varies differently with the horizontal stress difference under different loading modes which provides valuable experimental theoretical basis and reliable way to correct resistivity logging curves with crustal stress in the high and steep strata in the foreland basin .关键词
电阻率测井/高温高压/电阻率/各向异性/水平应力差/实验研究Key words
resistivity logging/high temperature and high pressure/resistivity/anisotropy/hori-zontal stress difference/experimental research分类
天文与地球科学引用本文复制引用
王伟,夏宏泉,王谦..高温高压下地应力对电阻率影响实验研究[J].测井技术,2017,41(6):642-647,6.
