中文摘要：

以沁水盆地南部3号煤为研究对象,利用压汞法、扫描电镜观察等分析方法,研究了煤层气储层特征。结合构造解析、盆地分析以及前人研究成果,探讨了区内煤层气成藏主控因素。研究表明:3号煤层煤岩类型以半亮煤为主,储层裂隙系统发育,煤岩热演化程度较高,生烃潜力巨大;压汞孔隙度在1．40%~5．87%之间,渗透率(0．06~0．58)×10-3um2,储层较致密,储集空间以孔隙和裂隙为主。逐一分析了沉积作用、岩浆侵入活动、水动力作用以及构造作用对煤层气聚集成藏的控制,综合分析认为顶、底板泥岩(致密砂岩)发育区、岩浆侵入活动活跃区、水动力弱~滞留区以及构造活动较弱区为煤层气的主要富集区域。

英文摘要：

It taking the third coal seam of the southern part of Qinshui basin as studying object, then coalbed gas reservoir characterswas studied by pressure pump method and scanning electron microscope. Accumulation main control factors were discussed by structuralanalysis, basin analysis and studying results of predecessors. The results showed that the lithotype of the third coal seam was seimbrightcoal, fractures developed fully in reservoir layers, the thermal evolution degree of coal and rock mass was high, and the potential thatgenerating hydrocarbon is tremendous, the pore ratio of pressure pump belong 1. 40% ~5. 87%, and permeate ratio is about (0. 06 ~0. 58) ×10-3 um2 , reservoir layers is densely, the main reservoir room is pore and fracture. The actions that to coalbed gas accumulationand reservoir were analyzed, which included deposition effect, rock magma invade, water dynamic , structural effect and soon. After synthesis analysis, the main accumulation zone of coalbed gas were the development zone of mudstone (densely sandstone)in roof and floor, the active zone of magma invading, the weak-retention zone of water dynamic and the weak zone of structural movement.