鄂尔多斯盆地东缘二叠系煤层气开发“甜点”地区基本地质特征分析

摘要

Lots of Permian coal exploration has been done in the eastern margin of the Ordos Basin. Coal bed methane (CBM) exploration has been lasting for a long time with high exploration level. CBM pilots have gotten good achievements. The Fairway area in San Juan Basin has the highest CBM production called "sweet spot". The different productivity appears in the different places of above mentioned area, which controlled by many factors. This paper discusses coal seam features, reservoir characteristics, and trap performances in the "sweet spot" of the eastern margin of the Ordos Basin in detail to guide CBM exploitation in other areas in terms of similar geological condition.%鄂尔多斯盆地东缘煤田勘探程度较高,煤层气地面钻井勘探历史比较长,勘探程度较高,煤层气开发试验取得了明显成果.美国圣胡安盆地FAIRWAY地区是煤层气产量最高的区域,称之为“甜点”.鄂尔多斯盆地东缘的不同区域二叠系煤层气产能不同,与多种因素有关,对该地区的“甜点”区的煤层特征、储层特征、圈闭特征等进行了详细分析,有利于指导该地区其他区域煤层气开发并指导同类地质条件地区的高产区预测.