Characterization of Pore Electrical Conductivity in Porous Media by Weakly Conductive and Nonconductive Pores

Zhu, Linqi; Wu, Shiguo; Zhang, Chaomo; Misra, Siddharth; Zhou, Xueqing; Cai, Jingong

doi:10.1007/s10712-022-09761-w

Cited by 6 publications

(1 citation statement)

References 146 publications

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“…Rock electrical properties are an essential foundation for rock materials, geophysics, geological evaluation, and hydrology research [1][2][3]. The micro-pore structure has a significant impact on the electrical resistivity characteristics of porous rock [4].…”

Section: Introductionmentioning

confidence: 99%

An Improved Rock Resistivity Model Based on Multi-Fractal Characterization Method for Sandstone Micro-Pore Structure Using Capillary Pressure

Xie,

Yin,

Zeng

et al. 2024

Fractal Fract

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Micro-pore structures are an essential factor for the electrical properties of porous rock. Theoretical electrical conductivity models considering pore structure can highly improve the accuracy of reservoir estimation. In this study, a pore structure characterization method based on a multi-fractal theory using capillary pressure is developed. Next, a theoretical electrical conductivity equation is derived based on the new pore structure characterization method. Furthermore, a distinct interrelationship between fractal dimensions of capillary pressure curves () and of resistivity index curves ( and ) is obtained. The experimental data of 7 sandstone samples verify that the fitting result by the new pore structure characterization method is highly identical to the experimental capillary pressure curves, and the accuracy of the improved rock resistivity model is higher than the Archie model. In addition, capillary pressure curves can be directly converted to resistivity index curves according to the relationship model between fractal dimensions of capillary pressure curves () and resistivity index curves ( and ). This study provides new ideas to improve the accuracy of pore structure characterization and oil saturation calculation; it has good application prospects and guiding significance in reservoir evaluation and rock physical characteristics research.

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