Abstract
The marine organic-rich shale of the Longmaxi Formation in the Dingshan area, southeast Sichuan, was studied using scanning electron microscopy (SEM), nitrogen adsorption/desorption and methane isothermal adsorption, mainly emphasizing the nanometer pore structure of organic matter (OM) and its effect on methane adsorption. The results show that the organic-rich shale with high total organic carbon (TOC) content in the high mature stage mainly develops a large number of inkbottle-shaped pores with sizes of 3-50 nm, which provide more effective adsorption sites and storage space for methane adsorption and enhance the adsorption ability of methane.
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