煤层气区评价参数及勘探方向

煤层气勘探选区评价的关键参数是煤层的含气量和渗透率。沉积作用、成岩作用、构造作用和封闭作用地这两个参数有影响。基于对各地持因素的综合分析，认为目前煤敢探重点区域应是华北，其次是华南；重点选区为鄂我斯贫地国中部低煤阶区、鄂尔多斯盆地东部中煤阶区、沁水盆地环斜坡带中一高煤阶区、豫西向斜带高煤阶区、钱西－濮阳斜皮带中煤阶区，冀中－冀东斜坡带中煤阶区、淮南－－淮北复向斜断块区中煤阶区和六盘水梳状褶皱复向斜

POTENTIAL EVALUATION PARAMETERS AND EXPLORATION DIRECTION IN A COALBED GAS REGION

The key parameters for screening coalbed gas exploration region are the gas content and permeability, which are controlled bythe deposition, diagenesis, structuring and sealing. Based on the integrated study on various fa~ors related, it is consideredthat the current coalbed gas exploration should be focused firstly on North China and then on South China, in which the keyregions should be: the central low coal step area of the Ordos basin, the eastern medium coal step area of the Ordos basin,the medium-high coal step area in ring-like slope of the Qinshui basin, the high coal step synclinal area in western Henanprovince; the medium coal step area in the Luxi-Puyang slope zone, the medium coal step area in the Jizhong-Jidong slopezone, the medium coal step area in the fault block of the HuainanaiHuaibei synclinorium and the medium-high coal step area inthe slope zone of the Liupanshui pectinate fold-synclinorium.