沁水盆地赵庄井田3#煤的煤层气虽然资源丰度高，但由于储集物性差等因素，导致煤层气解吸、扩散、运移产出速度缓慢，不但煤层气井单井产量低，而且产量衰减快，稳产期短，煤层气开发难度大。因此，针对煤层气产出不理想的情况，采用室内实验模拟结果和现场测试分析数据相结合方法对影响煤层气产出的原因进行了分析，指出了煤层气产出困难的3个主要影响因素：①3^#煤层裂缝极为发育，裂隙连通性差、充填堵塞严重；3^#煤大孔占比少，细孔、微孔占比大，煤层的渗流条件差，煤层的可动流体饱和度低，排水降压可产出的孔隙流体少，气体可解吸、扩散、渗流产出量少，致使煤层气的产出程度低；②3^#煤的临储比和含气饱和度低，煤层气井排水降压的可降幅程度小，压降漏斗的扩展面积小，致使产气效果较差；③煤层的塑性强、应力差异系数小，煤层与围岩的应力差小，煤层压裂裂缝延伸难度大，裂缝容易突破顶底板纵向延伸，压裂容易形成多裂缝，限制了裂缝长度的扩展延伸，致使压裂增产效果差。并提出优选煤层气开发有利区域、强化煤层压裂改造措施和分段压裂水平井抽采技术是实现赵庄井田3#煤层下一步煤层气高效开发的3个有利措施。

The 3^# coal in Zhaozhuang well field in Qinshui Basin has high abundance of CBM resources.The output speed of coalbed methane desorption，diffusion and migration is slow，the exploitation of coalbed methane in this coal seam faces issues such as unstable and low production and fast decline of gas production etc.，and the exploitation of coalbed methane in this coal seam is more difficult.Therefore，according to the characteristics of the coalbed methane production，the factors influencing coalbed methane production were studied by combining experiment and field test analysis.Three affecting factors of coalbed methane production difficulties are discussed:(1)3^# coal is characterized by very good development of fractures，poor fracture connectivity and filling jams.The macropore proportion of 3^# coal is small and the micropore proportion is large.The seepage condition of coal seam is poor，and it has low movable fluid saturation.The drainage decompression can produce less pore fluid，and the coalbed methane output level is low.(2)The ratio between the critical desorption pressure and reservoir pressure and the gas saturation of coal seam islow，the drainage pressure drop of coalbed gas wells is small，and the expansion area of pressure drop funnel is small，resulting in poor gas production effect.(3)Coal seam has the features of strong plasticity，low stress difference  between coal seam and surrounding rock，greater extension difficulty of the fracturing fracture，easy breaking through the roof and floor for longitudinal extension，easy formation of more cracks under fracturing，limited expansion of the crack length，and poor fracturing production.It is also suggested that optimizing favorable areas for CBM development，strengthening measures for coal seam fracturing and extraction technology for sublevel fracturing horizontal wells are three favorable measures for realizing efficient CBM development in 3# coal seam in Zhaozhuang field.