School of Resource & Geoscience,China University of Mining & Technology MOE Key Laboratory of CBM Resources
and Reservoir Formation Process

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 Syncline of Zhina Mining Area were systematically studied.The influences of coal reservoir's pore characteristics on CBM exploitation in multiple 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-p ore 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 a nd 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 shoul d be exploited in priority as a major force in the study area.

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)；