用纵波AVO数据反演储层裂隙密度参数

Inverting reservoir fracture density using P-wave AVO data

1. 中国地质大学地球物理系,武汉430074;2. 西安工程学院,西安710054

Geophysical Department, China University of Geosciences, Wuhan 430074

主要研究以成熟的纵波信息采集和处理技术为基础的反演裂隙型储层特征参数的方法。详细讨论了弹性参数、各向异性系数和裂隙特征参数之间的关系,导出了利用AVO数据反演裂隙密度参数的基本方程,并给出了二步削减参数反演的流程。

A method using proven technology of P wave acquisition and processing to invert reservoir characteristic parameters was proposed in the paper. We discussed comprehensively the relationship between elastic constants. Anisotropic parameters, characteristic parameters of fracture, derived basic equations for fracture density inversion with AVO data, and worked out a procedure to reduce the number of parameters in two steps. Numerical tests show that the method is robust and feasible.