我国煤层气生储层间的关系类型及特征

Types of Relationship between Source Beds and Reservoir Beds of Coalbed Gas in China and Its Features

分析、总结了我国煤层气生储气层间的关系类型,指出煤层气生成后,由于受各种因素的影响,均发生过运移,并将运移途径分为五种形式。同时根据煤的热模拟试验,从煤层气生成量与现测含气量大小的关系,将含气量分为两个类型,又以储气量大小分为七个级别。由此提出,今后对煤层(成)气的勘查与研究,应着重于大中型含煤盆地,把构造简单、煤层厚度和煤层气含量稳定的、埋深为800～1500m的区带作为地面垂直勘探和开发的首选区。

The relationship between source beds and reservoir beds of coalbed gas in China has summed up,and indicated that coalbed gas may be moved after forming,and there were5kinds of moving way.Based on the thermal simulation testing of coal,and the relationship between product of coalbed gas and existent content of gas,divided gas content into2types,and according to the gas reserve divided it into7ranks.So that prospecting and research of coalbed gas(coal gas)from now on,ought to put stress on the large and middle scale of coal basin,and the first election of exploration and exploitation area should there are sim-ple structure and stable thickness of coalbed and content of coalbed gas,and the depth of800～1500m.