AUTHOR=Shi Shuai , He Jinxian , Zhang Xiaoli , Wu Hongchen , Yu Ziqi , Wang Jian , Yang Tiantian , Wang Wei TITLE=Fractal analysis of pore structures in transitional shale gas reservoirs in the Linxing area, Ordos Basin JOURNAL=Frontiers in Earth Science VOLUME=10 YEAR=2022 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2022.979039 DOI=10.3389/feart.2022.979039 ISSN=2296-6463 ABSTRACT=
Studying complex pore structures and fractal characteristics of gas shale provides significant guidance for clarifying the mechanism of shale gas accumulation and realizing its efficient development. In this paper, 12 samples of Taiyuan Formation shale are used as the research object, and the fractal theory is combined with mercury intrusion porosimetry and N2 adsorption technology to innovatively solve the problem of splicing point selection, which can reveal the full-scale pore size distribution of shale. The results demonstrate that the most common types of pores in the chosen samples are pores between or within clay minerals, micropores and mesopores inside organic matter, and microfractures, based on scanning electron microscopy imagery analyses. The pores of shale samples have fractal geometries. The fractal dimension