煤层气成分影响因素分析  

Analyses on Influence Factors of Coal Bed Gas Components

作　　者：雷小乔[1] 

机构地区：[1]中国煤炭地质总局煤炭资源信息中心,河北涿州072750

出　　处：《中国煤田地质》2002年第4期25-27,共3页Coal Geology of China

摘　　要：煤系地层孔隙性和渗透率对煤层气的抽放、排采具有重要影响,但煤层气的生成却是其富集的先决条件。煤层气是煤内外因共同作用、具有一定规律性的多阶段复杂地质过程作用的结果,阐述了煤层气的成分和几种成因类型,分析了煤岩有机显微组成、成熟度、储层压力等因素对煤生气能力、吸附性、渗透性的影响。对分析煤盆地间、钻孔间以及煤层间煤层气成分的变化具有重要意义。The porosity and permeability of coal-bearing strata have important influen ce to the exhaust and mining of coal bed gas , but the production of coal bed gas is prec ondition of its richen. Coal bed gas is resu lt of joint action of internal cause and out er cause in coal and multi-stages complex g eological actions which there are certain l awness. The paper has expounded components and several types of coal bed gas and analys ed the influences of microlithotype, matur ity, reservoir pressure and so forth factor s for gas producibility of coal and absorba bility and permeability. There are importa nt significances for analyses on change of coal bed gas components between coal basins and drill holes and coal beds.

关 键 词：煤层气 储层压力 煤阶 孔隙性 渗透率 

分 类 号：P618.11[天文地球—矿床学]