摘要
通过对十八块岩样的覆压试验结果进行回归分析,得到了岩石压缩系数的变化规律。研究表明岩石压缩系数随覆压孔隙度、覆压渗透率的增大而增大,岩石压缩系数的变化率通常是随覆压孔隙度、覆压渗透率的增大而增大。岩石压缩系数与覆压孔隙度、覆压渗透率之间的关系大多数呈二次多项式。压缩系数与有效覆压之间通常呈指数递减,压缩系数的递减率通常是随有效覆压的增大而减小。
By regression analysis on overburden pressure experimental results of 18 rock samples, the transforming laws of rock compressibility are obtained. Study indicates that the rock compressibility rises with the increase of porosity and permeability of overburden pressure the rate of compressibility changes rises with the increase of overburden porosity and permeability, the relationship between the compressibility and overburden porosity and permeability is quadratic expression, the relationship between the compressibility and effective overburden pressure is exponential expression, while the decrease of compressibility is often with the increase of effective overburden pressure.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2007年第1期42-44,共3页
Journal of Oil and Gas Technology
基金
国家重点基础研究发展规划项目(2002CB211709)
中国石油天然气集团公司应用基础研究项目(05A10101)。
关键词
岩石压缩系数
覆压渗透率
覆压孔隙度
有效覆压
rock compressibility
overburden permeability
overburden porosity
effective overburden pressure
