中文摘要：

基于压汞实验,分析黔西响水井田XV-1井8个煤样的孔隙结构及分形特征,揭示孔隙结构参数之间的相互关系。煤储层孔隙系统具有3个特征：（1）瘦煤煤层孔隙度条件明显优于贫煤煤层,瘦煤煤层平均孔隙度为12.38%,渗流孔隙平均孔容含量达70.59%,孔喉连通性好,对煤层气开发极为有利。（2）孔隙度与孔容、渗流孔隙孔容含量及孔喉直径均值均呈正相关关系,与总退汞效率呈负相关关系,且不同孔径段的退汞效率存在明显差异。（3）不同煤样孔隙体积分形下限存在差异,分形下限与孔隙度具有负相关关系。

英文摘要：

Based on mercury injection experiments,the pore structure and fractal characteristic for 8 coal samples from XV-1well of Xiangshui mine field in the western Guizhou were studied.The relationship between the pore structure parameter was revealed.The features of the fissure system in the coal reserves seams are that（1）the porosity condition of lean coals are better than meager coals,the average porosity and seepage pore content are 12.38% and 70.59%,and the hole roar connectivity is good for lean coals so that the fissure system is highly advantageous for CBM development;（2） the porosity has positive correlation with pore volume,seepage pore content and pore throat diameter,but negative correlation with total mercury withdrawal efficiency.Moreover,the mercury withdrawal efficiency of different diameter has obvious differences;（3） There are differences for pore volume fractal floor level of different coal samples,and the fractal floor level has negative correlation with porosity.