胡底井田3号煤孔隙结构特征  

Pore Structure Characteristics of the No.3 Coal in Hudi Mine Field

作　　者：刘航 LIU Hang(Shanxi Lanyan Coalbed Methane Group Co.,Ltd.,Jincheng048006,China)

机构地区：[1]山西蓝焰煤层气集团有限责任公司,山西晋城048006

出　　处：《煤》2022年第10期18-24,共7页Coal

基　　金：山西省科技重大专项(20181101013)。

摘　　要：煤孔隙结构特征对煤层气赋存、吸附储集及运移等有重要影响,是煤层气地质理论重要的研究内容之一。文章采用低温液氮吸附静态容量法对胡底井田3号煤孔隙结构特征开展了实验研究,结果表明:井田内3号煤层中孔隙结构复杂及形态多样,煤中孔隙主要为两端开口的筒状孔、四面开放狭缝形孔、墨水瓶孔少量及少量一端开口的孔;受多地质因素及煤自身非均质性影响,样品内孔隙孔径、比表面积及孔隙体积具有一定差异和明显的分异现象;煤中有效微孔和过渡孔相对发育,比表面积总体较高,微孔和过渡孔是比表面积的主要贡献者;孔隙体积总体较高,储集煤层气能力强,煤中较发育的有效过渡孔和微孔为孔隙体积的主要贡献者。The characteristics of coal pore structure have an important influence on the occurrence, adsorption, storage and migration of coalbed methane, which is one of the important research contents of coalbed methane geological theory.Articles by the method of low temperature liquid nitrogen adsorption capacity of static, at the end of the No.3 coal mining field experimental study on pore structure characteristics, the results show that the pore structure of the No.3 coal seam in mining field and very complicated, mainly for the pores in coal open at both ends of the tubular hole, all open slit type hole, the ink bottle hole and a small amount of a small amount of the open end of the hole.Influenced by many geological factors and the heterogeneity of coal itself, the pore size, specific surface area and pore volume in the sample have certain differences and obvious differentiation phenomenon.The effective micropores and transition pores are relatively developed in coal, and the specific surface area is generally higher, and the micropores and transition pores are the main contributors to the specific surface area.The pore volume is generally high, and the reservoir capacity of coalbed methane is strong.The effective transition pores and micropores developed in coal are the main contributors to the pore volume.

关 键 词：胡底井田 低温液氮吸附法 煤孔隙结构特征 煤层气赋存及运移 

分 类 号：P618.11[天文地球—矿床学]