延川南区块高阶煤孔隙结构研究  

Study on High Ranked Coal Pore Structure in Yanchuan South Block

作　　者：曾凡武[1] 薛晓辉[1] 韦巍[1] 

机构地区：[1]中国石化华东分公司石油勘探开发研究院,江苏扬州225007

出　　处：《中国煤炭地质》2013年第2期21-23,共3页Coal Geology of China

摘　　要：为探讨延川南区块内煤层的微观孔隙结构,认识煤层气的储集和运移机理,采用低温氮吸附法对区块内的高阶煤样进行比表面积、孔容及孔径分布测试。结果显示:煤的孔隙度普遍较小,孔隙度差别较大;孔径以中孔和大孔为主,含有少量微孔,孔径主要集中在10nm-300nm。通过进一步分析样品在吸附和脱附过程中产生的滞后环,发现区块内煤的孔隙形态比较复杂,以墨水瓶状孔和平行板状孔为主,并含有少量的一端封闭的圆柱孔、平行板孔及锥形孔。To discuss coal seam microscopic pore structure in the Yanchuan south block,understand CBM reservoiring and migration mechanism,the low-temperature nitrogen adsorption method has been used to test high ranked coal specific surface,pore volume and pore size distribution in the block.The result has shown： coal porosity is generally small with big difference;pore size is mainly medium and large pores,a few micropores,the pore size is mainly concentrated within 10nm-300nm.Through further analysis of sample hysteresis loop come into being during adsorption and desorption processes,has found that the pore morphology in the block is rather complex,mainly ink-bottle pores and parallel plate pores and a few one end closed cylindrical pores and tapered pores.

关 键 词：延川南区块 高阶煤 煤层气 孔隙 毛细冷凝 滞后环 

分 类 号：P618.11[天文地球—矿床学]