摘要
渗透率应力敏感性研究方法不同,得到的敏感程度则不同。以氮气为孔隙流体,对一块低渗砂岩岩样进行不同围压和孔隙流体压力下的渗透率测试,利用Bernabé方法求取渗透率有效应力系数,获取渗透率有效应力,并对应力敏感指数法加以修正,发现岩样表现为中等应力敏感。
Different evaluation results may be obtained based on different evaluation methodologies. In this study, permeability is measured on a low - permeability clayey sandstone with the variation of confine pressure and pore pressure, and nitrogen is as the pore fluid. Effective method. Furthermore, effective stress for permeability sample shows moderate stress sensitivity. stress coefficient for permeability is gained with Bernabe＇ s can be expressed. Stress sensitivity index is revised, and the
出处
《重庆科技学院学报（自然科学版）》
CAS
2013年第1期52-54,59,共4页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
国家重点实验室国际合作项目(PLN0901)
关键词
渗透率应力敏感性
渗透率有效应力
应力敏感指数
渗透率有效应力系数
stress sensitivity for permeability
effective stress for permeability
stress sensitivity index
effective stress coefficient for permeability
