摘要：Pore aspect ratio, together with porosity, is a structural parameter that represents the geometric property of rock reservoirs. We have adopted the theory of ellipsoid modelling in material mechanics to derive the dry rock modulus. Based on this derivation, the Gassmann equation, which is a constitutional equation for a fully saturated rock model, can be linearized in terms of the pore structure parameters and the elastic parameters. We have established a relationship between the seismic reflection coefficient and the pore structure parameters, where the equivalent pore aspect ratio and porosity are two key parameters. Based on this relationship, the equivalent pore aspect ratio can be inverted directly from seismic reflection data instead of being converted from the intermediate parameters of conventional seismic inversion. Therefore, seismic inversion is a simultaneous inversion in which seven parameters are inverted: the elastic moduli (matrix bulk modulus and shear modulus, fluid bulk modulus), the densities (matrix and fluid densities) and the pore structure parameters (the equivalent pore aspect ratio and porosity). We applied this direct inversion scheme to a carbonate reservoir to predict the fracture development zone with low porosity and low aspect ratio. ? 2022 European Association of Geoscientists & Engineers.

ISSN号：0016-8025

卷、期、页：卷71期9：1821-1834

发表日期：2023-11-01

影响因子：0.000000

期刊分区（SCI为中科院分区）：三区

收录情况：EI（工程索引）,地学领域高质量科技期刊分级目录（国外T2）

发表期刊名称：Geophysical Prospecting

参与作者：Wang, Yanghua

第一作者：王国权,陈双全

论文类型：期刊论文

论文概要：王国权,陈双全,Wang, Yanghua，Direct inversion for the equivalent pore aspect ratio based on the theory of ellipsoid modelling，Geophysical Prospecting，2023，卷71期9：1821-1834

论文题目：Direct inversion for the equivalent pore aspect ratio based on the theory of ellipsoid modelling