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本文通过分析煤层气排采机理,得出煤层气排采因素分别是层间干扰,排采强度和煤尘堵塞三个方面。煤层气井低产减产的排采因素分成四类:(1)支撑剂返吐的影响;(2)煤层出煤粉的影响;(3)排采速度过快而产生应力敏感的影响;(4)生产压差不合理而造成渗透性降低的影响。本文最后提出三个建议来采取措施提高排采效果。
In this paper, through analyzing the mechanism of coalbed methane drainage, it is concluded that the factors of coalbed methane emissions are inter-layer interference, drainage strength and coal dust plugging. There are four types of factors that affect the low production of CBM wells: (1) the effect of proppant return; (2) the influence of pulverized coal out of the coal seam; (3) the stress- Produced pressure is unreasonable and caused by the impact of reduced permeability. At the end of this paper, three suggestions are put forward to take measures to improve the drainage effect.