我国中新生代聚煤盆地煤层气地质特征与勘探前景

THE COALBED METHANE GEOLOGY AND EXPLORATION PROSPECTS OF MESO-CENOZOIC ERA COAL-BEARING BASINS IN CHINA

我国中新生代聚煤盆地多且保存完整,煤炭资源量约占全国总资源量的40%,多数盆地含煤系数高,发育有富煤带和富煤中心。中新生代盆地的煤层气地质条件与古生代的大不相同,大多数中新生代聚煤盆地具备煤层气藏封闭保存的良好地质条件。由于中新生代盆地的煤层气成藏条件组合具有多样性的特点,认为应重视对中新生代盆地煤层气成藏条件的分析评价,应采用盆地整体分析、煤相分析和煤层气藏分析相结合的思路开展详细的煤层气勘探选区评价研究,在研究煤层气地质条件和煤层气藏分析的基础上选择煤层气勘探区块。

There are many Mesozoic-Cenozoic era coal-bearing basins in Northeast China, Xinjiang autonomous region, Erdos, etc. The coal reserves of the basins is about 40% of the total coal reserves in China. The basins usually are preserved very well, most of them have very chick coal seams, coal-rich belts and coal-rich area. There are very good seal and preserving conditions for the coalbed methane pools in the basins. Different from the geology of the Palaeozoic era coalbed methane pools, the Mesozoic-Cenozoic era coal-bearing basins have special association of coalbed methane pools geological condition. The analysis of the association of coalbed methane pools geological condition of the basins should be paid attention to, the detail analysis and evaluation of the target area in the basin should be carried out by combination of the research ideas of basin analysis, coal facies analysis and coalbed methane pools analysis. Based on the research and evaluation, the coalbed methane pools exploration should be carried out as soon as possible.