Numerical simulation of the electrical properties of shale gas reservoir rock based on digital core

作者：Xin Nie, Changchun Zou, Zhenhua Li, Xiaohong Meng, Xinghua Qi · 发表于：Journal of Geophysics and Engineering · 年份：2016 · DOI：10.1088/1742-2132/13/4/481 · 被引用次数：49 · 研究领域：Seismic Imaging and Inversion Techniques、Hydrocarbon exploration and reservoir analysis、Geophysical and Geoelectrical Methods

In this paper we study the electrical properties of shale gas reservoir rock by applying the finite element method to digital cores which are built based on an advanced Markov Chain Monte Carlo method and a combination workflow. Study shows that the shale gas reservoir rock has strong anisotropic electrical conductivity because the conductivity is significantly different in both horizontal and vertical directions. The Archie formula is not suitable for application in shale reservoirs. The formation resistivity decreases in two cases; namely (a) with the increase of clay mineral content and the cation exchange capacity of clay, and (b) with the increase of pyrite content. The formation resistivity is not sensitive to the solid organic matter but to the clay and gas in the pores.