Pore structure characteristics of Permian organic-rich shale in Lower Yangtze area.

In this study, advanced technologies were applied to investigate the geochemistry, mineral compositions, porosity and pore structures of the Permian shale core samples from this area. The results show that the Permian source rocks have an average porosity up to 5.37% and the nanoscale pores are mainly developed as micro- and meso-pores. The total organic carbon (TOC) content and clay mineral content of the shales are key factors to control gas adsorption capacities and pores sizes. The well developed nanopores and large surface area in the Permian organic-rich shale could provide good conditions for shale gas storage. [ABSTRACT FROM AUTHOR]