一种碳酸盐岩流体替换新方法

A novel method of fluid substitution in carbonates

针对碳酸盐岩的基质矿物类型非单一且孔隙结构复杂多变的特点,提出一种适用于碳酸盐岩的流体替换方法。以常规Gassmann方程为基础,采用流体因子分析的基质矿物体积模量反演方法和碳酸盐岩岩石物理模型的孔隙结构反演方法,得到岩石基质矿物的体积模量,并考察复杂孔隙结构的影响,实现碳酸盐岩的流体替换。岩石物理测试分析数据和实际测井资料的计算结果均证明了新方法的正确性和有效性。

According to the complexity of carbonates： non-single types of matrix mineral and complex porosity structure, a new fluid substitution method for carbonates was proposed. Based on Gassmann equation, the method employs the technique of matrix mineral bulk modulus inversion based on fluid analysis and the technique of porosity structure inversion based on carbonate model, and effectively solves the difficulties of fluid substitution in carbonates ： the solution to the bulk modulus of matrix mineral and the effect of the complex porosity structure. The results based on rock physics testing data and practical log data show the accuracy and effectiveness of the new method.