考虑多因素影响的岩石压缩系数计算新公式

发布时间：2018-07-28 20:54

【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。
[Abstract]:For the compression coefficient of rock, the operation process is cumbersome and expensive, and the calculation process of the theoretical formula is more complicated. However, the empirical formula is easy to calculate because of its simple form. Become the first choice of actual production site calculation method. However, the traditional empirical formula takes less factors into account and cannot truly reflect the actual situation of rock. Therefore, based on the idea of multivariate regression, the porosity, permeability and overburden pressure of rock are considered. A new formula for calculating the compressibility coefficient of rock is established. The calculation results are more reasonable, the method is simple and quick, and the method is easy to operate. The analysis of examples shows that the results of the new method are closer to the actual compression coefficient of rock than the existing empirical formula, and the average error is less than 1%. The research results have important practical significance for the high-efficiency development of oil and gas reservoirs.
【作者单位】：西南石油大学石油工程学院;
【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)
【分类号】：TE31

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