西北地区构造活动对煤层气成藏的控制作用

Tectonic control activities on CBM reservoir and accumulation in Northwest China

从西北地区构造背景、构造演化及构造类型等几方面探讨了构造作用对煤层气的控制。构造作用直接或间接控制着从含煤地层形成至煤层气生成聚集全过程,是煤层气控制地质因素中最重要的因素。聚煤期构造控制煤系地层和煤层发育特征。聚煤期后构造控制着生、储、盖层性能及组合,并影响煤层气运、聚、保特征,从而影响煤层气勘探开发潜力。

Based on the tectonic setting, evolution and types in Northwest China, the tectonic control activities on coalbed methane （CBM） reservoir and accumulation have been probed into in this paper. By all means, tectonics play an important role on the generation, accumuiation, migration and trap of CBM. Tectonic setting and its evolution during coal accumulation are basic factors to control formation and distribution of coal beds and coal measures, while different forms of structures after coal accumulation are dominant factors to control accumulation and conservation of CBM, and finally affect the exploitation of coalbed methane.