为明确鄂尔多斯盆地保德区块中低煤阶煤层气井及不同区域的产气特征，指导开发技术政策的制定，采用Arps递减分析法、产量累积法和流动物质平衡法，结合区块实际生产数据，建立了适用于不同开发阶段的煤层气可采储量计算方法。通过综合应用数据统计和生产动态分析等方法，系统研究了该区块3个开发单元（开发一单元至三单元）的可采储量与产气特征，并对比地质与开发参数，明确了地质条件差异对产气特征的影响。研究结果表明：保德区块由北向南（开发一单元至三单元），稳产期日产气量由3 314 m³降至864 m³，采气速度由3.82%降至0.99%，可采储量由1 391×10⁴ m³降至399×10⁴ m³，采收率由48.50%降至16.99%；同时，见气时间由99 d延长至228 d，稳产时间由981 d增加至1 553 d。相关性分析显示：稳产期日产气量与临储比、临界解吸压力及8+9号煤厚度显著相关，而可采储量则与8+9号煤厚度、4+5号煤含气量具有较高的相关性。地质参数对比表明，开发一单元的主力煤层厚度、含气量及临储比均优于开发二单元和三单元，且保存条件更为优越。研究认为，保德区块产气特征的南北差异主要受地质条件影响：北部开发一单元资源条件优越，煤层厚、含气量高、临储比大，因此，稳产气量高、采气速度高；南部开发三单元资源条件较差，稳产气量低，但稳产期较长。研究结果可为保德中低煤阶煤层气田的高效开发及不同单元排采制度的优化提供科学依据。

In order to clarify the gas production characteristics of medium and low rank coalbed methane wells in different regions of the Baode block of the Ordos Basin, and to guide strategy development, methods such as the Arps decline analysis, production accumulation method, and flowing material balance method were applied in conjunction with actual production data from the block to establish a calculation method for recoverable coalbed methane reserves applicable to different stages of development. Through the comprehensive application of data statistics, production dynamic analysis, and other methods, the recoverable reserves and gas production characteristics of three development units (Development Unit 1 to Unit 3) in the block were systematically studied. By comparing geological and development parameters, the influence of geological condition differences on gas production characteristics was clarified. The results showed that from north to south (Development Unit 1 to Unit 3) in the Baode block, the daily gas production during the stable production period decreased from 3 314 m³ to 864 m³, the gas recovery rate declined from 3.82% to 0.99%, the recoverable reserves reduced from 1 391×10⁴ m³ to 399×10⁴ m³, and the recovery factor dropped from 48.50% to 16.99%. Meanwhile, the gas breakthrough time extended from 99 days to 228 days, and the stable production duration increased from 981 days to 1 553 days. Correlation analysis showed that daily gas production during the stable production period was significantly correlated with the temporary storage ratio, critical desorption pressure, and the thickness of the 8+9 coal seam, while recoverable reserves were highly correlated with the thickness of the 8+9 coal seam and the gas content of the 4+5 coal seam. A comparison of geological parameters indicated that the main coal seam thickness, gas content, and temporary storage ratio in Development Unit 1 were superior to those in Development Unit 2 and Unit 3, and the preservation conditions were also better. The study concludes that the north-south differences in gas production characteristics of the Baode block are primarily influenced by geological conditions. The northern Development Unit 1 has superior resource conditions, with thicker coal seams, higher gas content, and a larger temporary storage ratio, resulting in higher stable gas production and higher recovery rates. The southern Development Unit 3 has poorer resource conditions, leading to lower stable gas production but longer stable production periods. The findings provide a scientific basis for the efficient development of medium and low rank coalbed methane fields and the optimization of different unit drainage systems in the Baode block.