考虑多因素影响的岩石压缩系数计算新公式  

A new formula of rock compressibility by the consideration of many factors

作　　者：熊钰[1] 邓丹[1] 王子敦 王冲[1] 

机构地区：[1]西南石油大学石油工程学院,四川成都610500

出　　处：《油气藏评价与开发》2016年第5期21-28,共8页Petroleum Reservoir Evaluation and Development

基　　金：国家自然科学基金重点项目"致密气藏储层干化;提高气体渗流能力的基础研究"(51534006)

摘　　要：对于岩石压缩系数,采用实验测定操作流程繁琐且成本昂贵,理论公式所需参数较多计算过程复杂,而经验公式由于其形式简单,易于计算,成为实际生产现场首选的计算方法。然而,传统的经验公式所考虑的因素较少,不能真实反映岩石实际情况,故基于多元回归的思想,考虑了岩石的孔隙度、渗透率、上覆压力、孔隙内压力以及黏土含量等诸多影响因素,建立了一种计算岩石压缩系数的新关系式,计算结果更加合理且方法简单快捷,易于操作。实例分析表明,新方法较已有的经验公式计算的结果更接近岩石的实际压缩系数值,平均误差在1%以内。研究成果对油气藏的高效开发具有重要的实际意义。For rock compressibility, the experimental operation process is expensive and complex, and theoretical formula needs many parameters and the computation process is complex, however, due to the simple form and computation process, the empirical formula has become the preferred method for actual production field. Because of fewer factors considered in traditional empirical formula, they can’t really reflect the real rock conditions. Based on multiple regression method, and by the consideration of porosity, permeability, burden pressure, pore pressure and clay concentration, a new formula for calculating rock compressibility is established, moreover, the computation is more reasonable and the method is simpler, effective, and easier to operate. Practices show that the computation is closer to the real compressibility by this new method, and the average error is within 1 %. This research has practical significance for high efficient development of reservoir.

关 键 词：岩石压缩系数 经验公式 上覆压力 孔隙度 渗透率 黏土含量 

分 类 号：TE311[石油与天然气工程—油气田开发工程]