Abstract: 【Objective】As an important component of the pore system, closed pores can host a significant amount of adsorbed gas. However, conventional methods are difficult to detect closed pores, and neglecting them will affect the accurate assessment of shale gas resources. To date, the development characteristics and evolution model of closed pores in western Hubei remain unclear, making systematic research urgently needed. 【Methods】Therefore, this study focuses on the main controlling factors of closed pore development in different lithofacies shales, deeply analyzes the coupling relationship between closed pore characteristics and mineral composition, organic matter abundance, and bedding direction, clarifies the closed pore characteristics of shales with different lithofacies and bedding directions, and establishes a diagenetic evolution model of closed pores in shales. 【Results】The results show that: (1) Closed pore development is jointly controlled by minerals and organic matter. Rigid minerals inhibit the formation of closed pores in the macropore range, carbonate mineral dissolution easily forms isolated large pores, and clay minerals promote closed pore development through plastic deformation and cementation by filling. (2) Total organic carbon (TOC) content is positively correlated with the closed pore ratio in the micropore range but negatively correlated with that in the macropore range. The closed pore ratio in the micropore range is higher in the direction parallel to bedding, while that in the macropore range is higher in the direction perpendicular to bedding. (3) A diagenetic evolution model for closed pores in shales has been established. In the early sedimentation stage, primary pores are well-developed with few closed pores. In the early diagenetic stage, compaction dominates, leading to an increase in closed pores. In the middle diagenetic stage, dissolution and organic matter hydrocarbon generation jointly contribute to closed pores in the micropore range. In the late diagenetic stage, compaction and cementation maximize the closed pore volume. 【Conclusion】It is concluded that the research findings deepen the understanding of the development characteristics and evolution patterns of closed pores in different lithofacies shales, clarify the controlling effects of mineral composition, TOC content, and bedding direction on closed pores, and can provide a theoretical basis for shale gas reservoir evaluation and sweet spot prediction.