Deep shale sedimentary environment, diagenesis, and pore evolution are closely related to the occurrence state and content of shale gas, exerting significant control on reservoir quality. In this study, scanning electron microscopy (SEM), mineral composition, spectral gamma-ray logging, elemental logging, and comprehensive well log data were used to analyze the sedimentary environment. Combined with pore structure and storage space experiments, the geological conditions for deep shale gas accumulation were discussed. The Longmaxi Formation high-quality shale reservoirs in southern Sichuan (Luzhou area) are laterally extensive, vertically thick, and contain well-developed natural fractures; t... More >