The South Yanchuan block is the deepest developed high-rank coalbed methane (CBM) field in China, the geological conditions in this block are complex and the main controlling factors of CBM content are various. Thus, a decision-making model of the potential of deep high-rank coalbed methane resource based on geographical information system (GIS) and weighted linear combination (WLC) is established, the influence of geological conditions on CBM content is analyzed, the favorable areas of CBM potential are divided. Results show that the buried depth, coal rank and hydrodynamic condition in the coal seam are dominant factors that control the gas content on a block scale, while the gas content has a weak correlation with maceral composition, coal thickness and the effective thickness of the overlying strata. The study area is divided into five units according to the natural breaks method, i.e., the extramely favourable area, the favourable area, the relatively favourable area, the normally favourable area and the unfavourable area, which account for 14.23%, 22.23%, 24.77%, 25.08% and 13.70% in area, respectively. The extramely favourable area is located in the northwestern of the South Yanchuan block, which is considered to be the key exploration and development area. The study will deepen the understanding of the control of CBM potential in south Yanchuan Block, and is of practical significance for CBM recovery in this area.

延川南区块是我国开发最深的高阶煤层气（CBM）田，该区块地质条件复杂，煤层气含量主控因素多样。为此，建立了基于地理信息系统（GIS）和加权线性组合（WLC）的深层高阶煤层气资源潜力决策模型，分析了地质条件对煤层气含量的影响，确定了有利区煤层气潜力被划分。结果表明，煤层埋深、煤阶和水动力条件是控制区块尺度瓦斯含量的主导因素，而瓦斯含量与显微组成、煤层厚度和上覆有效厚度的相关性较弱。地层。研究区按自然断裂法划分为极有利区、有利区、相对有利区、通常有利区和不利区5个单元，分别占14.23%、22.23%、24.77面积分别为 %、25.08% 和 13.70%。特优区位于延川南区块西北部，被认为是重点勘探开发区。该研究将加深对延川南区块煤层气潜力控制的认识，对该区煤层气采收具有现实意义。面积分别为 08% 和 13.70%。特优区位于延川南区块西北部，被认为是重点勘探开发区。该研究将加深对延川南区块煤层气潜力控制的认识，对该区煤层气采收具有现实意义。面积分别为 08% 和 13.70%。特优区位于延川南区块西北部，被认为是重点勘探开发区。该研究将加深对延川南区块煤层气潜力控制的认识，对该区煤层气采收具有现实意义。