沁北阳泉区块煤储层孔隙分布对吸附特征的影响  

Influence of Pore Distribution of Coal Reservoir on Adsorption Characteristics of Yangquan Block in South Qinshui Basin

作　　者：薛园园[1] 邵长奎 刘辰琛 张伟 任志扬 郑娇娇[1] XUE Yuan-yuan;SHAO Chang-kui;LIU Chen-chen;ZHANG Wei;REN Zhi-yang;ZHENG Jiao-Jiao(Great Wall College of China University of Geosciences,Baoding 071000,China;China Geo-Engineering Corporation,Baoding 071000,China)

机构地区：[1]中国地质大学长城学院,河北保定071000 [2]中国地质工程集团有限公司,河北保定071000

出　　处：《河北地质大学学报》2020年第3期19-23,共5页Journal of Hebei Geo University

基　　金：五矿区域瓦斯地质分布规律及未采区瓦斯富集区预测(YM10017)。

摘　　要：为了研究沁水盆地北部阳泉区块15~#煤储层的孔隙分布规律及其对吸附特征的影响,对干燥煤样分别进行扫描电镜实验、压汞实验以及等温吸附实验。实验结果表明:阳泉区块15~#煤储层显微组分以各类镜质体为主,次为片状和粒状惰质体和壳质体及矿物质颗粒。孔隙较发育,次为裂隙,孔隙多呈条带状分布连通性好,且以过渡孔为主,孔容比达50.66%,这增大了煤的表面积。这些因素都为煤层气赋存提供了空间,使煤储层吸附甲烷能力增强。大孔、中孔发育也较好,既有利于煤层气的赋存又利于其在煤储层中的渗流。In order to study the influence of pore distribution of 15#coal reservoir on adsorption characteristics of Yangquan block in south Qinshui basin,scanning electron microscopy,mercury injection experiment and isothermal adsorption experiment of dry coal were done.Experimental results show that Macerals of 15#coal reservoir in Yangquan block are mainly all kinds of vitrinite,followed by inertinite,exinite and mineral particles of flaky and granular.Pores are developed,followed by cracks.They are mostly striped dis⁃tribution and connectivity is better.Transition hole takes the dominant position,pore volume ratio is 50.66%,it increases the surface area of the coal.These factors provide space for coalbed methane,enhanced the ability of coal to adsorb methane.The development of macropores and mesopores is also better,it is conducive to the occurrence and the seepage of coalbed methane in coal seam.

关 键 词：沁水盆地 阳泉区块 煤储层 孔隙特征 吸附特征 

分 类 号：TE122[石油与天然气工程—油气勘探]