近年来，新疆高挥发分烟煤储层成为我国煤层气开发的聚焦领域。煤层气修井停抽可导致储层贾敏伤害，进而减小煤层气井单井产能。以新疆高挥发分烟煤岩心为研究对象，通过物理模拟实验研究了高挥发分烟煤储层排采过程贾敏伤害形成特征，并利用低场核磁共振技术分析了伤害过程特征和贾敏伤害后气相占据的孔裂隙空间。结果表明：①单相水流阶段平行层理煤心水相渗透率（0.872×10⁻³～1.066×10⁻³ μm²）高出垂直层理煤心水相渗透率（0.064×10⁻³～0.112×10⁻³ μm²）1个数量级。贾敏伤害稳态后平行层理和垂直层理煤心渗透率伤害率分别达40.60%、50.00%；②贾敏伤害后煤心部分水不可流动且其体积随时间增大体积增大，导致贾敏后水驱过程渗透率递减；③物理模拟表明，重新开井排采无法通过地层水驱将修井停抽聚集的气体完全驱替出岩心，气体聚集成团位于中孔和大孔及裂隙中，占据渗流孔裂隙空间，导致水相渗透率减小，抑制煤层气井重新打开后排水降压；④建议通过加强气井管理、延长修井检泵周期、保持排采稳定、研制抑制贾敏的消泡剂、实施脉冲激励淘洗等方式弱化近井地带储层贾敏伤害，释放低产煤层气井产能。

In recent years, the high volatile bituminous coal reservoir in Xinjiang has become the focus area for Coalbed Methane (CBM) development. The Jamin effect in the reservoir can be caused by well repair and pumping suspension, which in turn reduces the single-well productivity of CBM wells. This paper takes the high volatile bituminous coal reservoir in Xinjiang as the research object, studies the characteristics of Jamin damage formation during the drainage process in high volatile bituminous coal reservoirs through physical simulation experiments, and uses low-field nuclear magnetic resonance technology to analyze the characteristics of the damage process and the pore-fracture space occupied by gas phase after Jamin damage. The results show that: ①The permeability of the water phase in the parallel bedding coal sample (0.872×10⁻³～1.066×10⁻³ μm²) in the single-phase flow stage is one order of magnitude higher than that of the vertical bedding coal sample (0.064×10⁻³～0.112×10⁻³ μm²). The water phase permeability damage rate after Jia-min in parallel bedding and vertical bedding coal samples at steady-state reached 40.60% and 50.00%, respectively; ② After Jia-min damage, part of the water in coal core becomes non-mobile, and the volume of this part increases over time. This increase in volume leads to a decrease in permeability during the post-Jia-min waterflooding process;③The physical simulation suggests that when a CBM well temporarily halted for maintenance, the accumulated gas within the reservoir cannot be fully displaced by the formation water during subsequent re-opening and waterflooding. The gas tends to cluster in the medium and large pores and fractures, occupying the pore space for fluid flow. This leads to a reduction in water permeability and inhibits the effective removal of water upon re-opening of the CBM well, resulting in reduced drainage efficiency and pressure reduction;④ It is recommended to reduce Ja-min effect in the vicinity of the well and release the productivity of low-yield CBM wells by strengthening gas well management, extending well repair and pump inspection cycles, maintaining stable drainage, developing Jamin-suppressing antifoaming agents, and implementing pulse excitation flushing methods.