Pore Structure Characteristics of Carbonate Rocks and Their Influence on Permeability

作者：Shenting Gang, Jia Tao, Yinger Deng, Pengjie Li, Minghui Lv, Liting Xing, Lixia Li · 发表于：ACS Omega · 年份：2025 · DOI：10.1021/acsomega.4c10579 · 被引用次数：9 · 研究领域：Hydrocarbon exploration and reservoir analysis、Groundwater flow and contamination studies、Rock Mechanics and Modeling

The formation of heterogeneous pore structures is primarily influenced by the depositional environment and diagenetic processes. The inhomogeneity of carbonate media leads to the development of microfractures and dissolution pore structures, which significantly contribute to the permeability of the aquifer. In this study, various theories and methods, including geological, hydrodynamic, fractal geometry, threshold segmentation, three-dimensional reconstruction, and pore network extraction methods are integrated. Focusing on the karst Baotu Spring area in northern China, representative carbonate rock samples from the Jinan Spring area were selected. Using computed tomography (CT) scanning technology, these core samples were digitally reconstructed, allowing for an in-depth analysis of the spatial structural characteristics of the pores, fractures, and dissolution pores. Additionally, on the basis of the Navier-Stokes equations, the fluid flow process within the pore structure of carbonate rocks was simulated, and the effective permeability was determined. In this study, the impact of pore characteristic parameters on permeability were explored. The results reveal that the total porosities of the carbonate rocks range from 0.89% to 10.35%, with effective porosities varying between 0.6% and 6.12%. The surface porosities of the samples exhibit significant variability, with the pore structure showing strong inhomogeneity and high permeability. Correlation analyses of key parameter...