Abstract: At present, the deep coalbed gas resources in the Suide area are at the early stage of exploration. Clarifying the accumulation and enrichment mechanisms of coalbed gas in this region is therefore of great significance for the efficient development of deep coalbed gas. This study focuses on the No. 8 coal seam of the Benxi Formation from Well Suide 1H. Using organic petrology and rock physics approaches, the differences in reservoir properties between this well and adjacent areas, as well as the controlling factors of depositional environment, pore structure, and gas occurrence characteristics, were systematically analyzed and discussed. The results show that: ① the coal-forming peat in the study area was mainly derived from wet-forest and open-water marshes; ② micropores are the dominant pore type, and ash content is the primary controlling factor for micropore development in the coal reservoirs; ③ the No. 8 coal seam of the Benxi Formation exhibits a relatively high gas content, with desorbed gas accounting for the major component of the total gas content; ④ the coal reservoirs in the study area are characterized by high-quality coal, high gas content, gentle structure, and continuous deposition, which together favor coalbed gas enrichment and accumulation. This study clarifies the reservoir and accumulation characteristics of the No. 8 coal seam from Well Suide 1H and provides valuable insights for the exploration and development of deep coal reservoirs.