The geochemical and pore characteristics of a typical marine–continental​ transitional gas shale: A case study of the Permian Shanxi Formation on the eastern margin of the Ordos Basin

• DOI: 10.1016/j.egyr.2021.06.056
• Publication Date: 2021-06-20T12:36:10Z
• Authors: Zhen Qiu; Dongjun Song; Leifu Zhang; Qin Zhang; Qun Zhao; Yuman Wang; Hanlin Liu; Dexun Liu; Shuxin Li; Xingtao Li
• Keywords: Organic geochemistry

The marine–continental transitional Permian Shanxi Formation, which is located on the eastern margin of Ordos Basin, expected to be another set economic gas shale for exploration and development in China. In this study, geochemical methods, low-pressure adsorption, high-pressure mercury intrusion, field emission scanning electron microscopy (FE-SEM) imaging were performed investigate pore structure characteristics second member shale. results show that average TOC content 5.90%, thermal maturity 2.22% Ro, these organic-rich shales are enriched clay minerals. Mesopores predominant type shales, have slit-like shapes. FE-SEM analysis reveals interparticle pores associated with minerals more developed than organic-hosted pores, while a few SEM-invisible micropores may related aromatic structures kerogen Pore studied samples influenced by mineral contents. shows obvious differences when compared representative marine worldwide, ascribed types. Nevertheless, mesopores comparable indicates presence qualified space storage This study will provide crucial theoretical guidance determining sweet spots further gas.