多煤层区煤储层孔隙特征及煤层气可采性研究  

Study on pore characteristics of coal reservoir and CBM recoverability in multiple coal seam blocks

作　　者：姜玮[1,2] 吴财芳[1,2] 赵凯[1,2] 梁冲冲[1,2] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221008 [2]煤层气资源与成藏过程教育部重点实验室,江苏徐州221008

出　　处：《煤炭科学技术》2015年第8期135-139,共5页Coal Science and Technology

基　　金：江苏省普通高校研究了生科研创新计划资助项目(CXLX13-948);国家科技重大专项资助项目(2011ZX05034);国家自然科学基金资助项目(41272178)

摘　　要：基于压汞以及低温氮吸附试验,系统地研究了织纳矿区珠藏向斜各煤层孔隙结构特征,分析了煤储层孔隙特征对多煤层区煤层气开采的影响。研究结果表明:珠藏向斜煤样以微孔、过渡孔为主,大孔和中孔发育较差。随着煤层层位的降低,微孔含量呈现波动式变化。压汞曲线与低温氮吸附测试曲线分别将煤储层孔隙分为3类,其中织纳矿区16号煤储层孔隙以开放孔为主,含有少量的半封闭孔,退汞效率较高,孔隙的连通性好,并且孔隙中微孔、过渡孔连续分布,两者连通性强,可作为研究区煤层气主力开采煤层优先开采。Based on mercury injection and low nitrogen adsorption experiments, pore structure characteristics of coal seams in Zhuzang Syn- cline of Zhina Mining Area were systematically studied.The influences of coal reservoir＇s pore characteristics on CBM exploitation in multi- ple seam blocks were analyzed.The results showed that the coal samples were dominated by micro-pores and transitional pores, and its macro-pores and mesopores developed poorly.With the dropping of coal seam position ,micro-pore content presented fluctuation.The pores of coal reservoir were classified into three groups by mercury injection and low-temperature nitrogen adsorption curves.No. 16 coal reservoir of Zhina Mining Area was dominated by open pores, and had small amount of semi-closed pores.The samples were higher in withdrawal mercury efficiency and better in the pore connectivity.The micro-pores and transitional pores of the samples had a good continuity and strong connectivity.Therefore, No. 16 coal reservoir should be exploited in priority as a major force in the study area.

关 键 词：煤储层 孔隙结构 多煤层 压汞试验 

分 类 号：P618.11[天文地球—矿床学]