华北残留盆地煤层气成藏动力学过程研究——以沁水盆地和鄂尔多斯盆地东缘为例  

Dynamic Accumulation Process of Coalbed Methane in Residual Basins of North China——A Case Study of the Qinshui Basin and the Eastern Margin of Ordos Basin

作　　者：韦重韬[1] 秦勇[1] 姜波[1] 傅雪海[1] 张志庆[1] 郭建[1] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221116

出　　处：《地质学报》2008年第10期1363-1367,共5页Acta Geologica Sinica

基　　金：国家"973"项目(编号2002CB211704);国家"863"项目(编号2006AA06Z231);国家自然科学基金重点项目(编号40730422);面上项目(编号40572095)资助成果

摘　　要：在系统研究以沁水盆地等为代表的华北残留盆地煤层气地质特征、构造演化史、埋藏史和热史的基础上,运用数值模拟方法定量研究了其主煤层的煤层气成藏演化历程。结果表明,华北残余盆地煤层气成藏演化一般显示出微弱—活跃—散失3个阶段依次出现的总体特征;由于煤层气地质特征和构造演化史、埋藏史以及热史的差异,成藏类型可划分为演化活跃且煤层气高度聚集的活跃型、演化微弱且成藏程度较低的微弱型和两者之间的过渡型3类。其中第一、三类具有较好的含气性,即潜在的煤层气开发前景。Geological tectonic features, burial and geothermal evolution history of Qinshul Basin and other basins, as the representations of north China residual basins, have been studied. Forming process of coalbed methane reservoirs in main coat seams has been studied by using numerical simulation. The results indicate that reservoir forming of residual basins in North China generally experienced three stages： weak--active--dissipating. Based on the variations of coalbed methane geological features, tectonic, burial and geothermal evolution history, the coalbed methane reservoir formation can be classified as following： （1） active type, which evolves actively and coalbed methane concentrates in high level; （2） weak type, which evolves weakly and coalbed methane barely concentrates and （3） medium type. The first and the third type have more preferable coalbed methane bearing feature, that is, the potential of exploitation.

关 键 词：煤层气 成藏 残留盆地 数值模拟 

分 类 号：P618.11[天文地球—矿床学] TE122.3[天文地球—地质学]