摘要:Both coal seams and shales are unconventional oil and gas resources reservoirs, it is important for exploration and development to make a summarized and comparative study for pore structure characteristics of two kinks of reservoirs. Based on the descriptions of pore-fracture characteristics by researchers in domestic and abroad using different testing methods this paper aimed at contrasting and exploring pore characteristic of coal-bed methane and shale gas reservoirs. The study show that the organic-rich shales and coals are both organic-rich rocks, their pore structure characteristics are of strong similarity, organic matter microporous are strongly developed; however, there existing the differences between the two kinds of reservoirs in physical and chemical properties, includes organic matter, type organic quality, mineral components and quality, which resulting in different pore structure characteristics. It will also affect the intensity of the late thermal evolution, diagenesis and tectonism to the shale and coal pore structure.