论文部分内容阅读
煤层气(Coalbed gas)是指煤在煤化过程中生成并储存于煤层中的天然气。它是一种介于常规天然气与煤层之间的非常规性天然气资源,因其成分主要是甲烷,也称为煤层甲烷(Coalbed methane)。煤层气在煤层中的赋存形式有三种,分别是吸附气、游离气和溶解气,其中吸附气占总体积的90%～95%。煤层既是煤层气的源岩又是它的储层。众所周知,煤是一种多孔物质,其基质孔隙特别发育,孔隙内比表面积异常大。据测定,每吨煤的内比表面积可达0.929亿平方米,可吸附几立方米到二、三
Coalbed gas is the natural gas produced by coal during coalification and stored in coal seams. It is an unconventional source of natural gas between conventional gas and coal seam because of its predominantly methane content, also known as coalbed methane. There are three types of CBM occurrences in the coal seam: adsorbed gas, free gas and dissolved gas, of which adsorbed gas accounts for 90% to 95% of the total volume. The coal seam is both a source rock and a reservoir of CBM. As we all know, coal is a porous material, the matrix pores are particularly developed pore specific surface area abnormalities. It is determined that the internal specific surface area per ton of coal up to 229.2 million square meters, can absorb a few cubic meters to two or three