黔西滇东上二叠统煤孔隙发育特征及煤级对孔隙的影响  

Coal pore characteristics of upper permian in western Guizhou and eastern Yunnan and the effect of coal rank on pore

作　　者：蔡佳丽[1] 汤达祯[1] 许浩[1] 陈贞龙[2] 赵兴龙[1] 

机构地区：[1]中国地质大学(北京)能源学院煤层气国家工程中心煤储层实验室,北京100083 [2]中国石油化工股份有限公司华东分公司石油勘探开发研究院,江苏南京210011

出　　处：《洁净煤技术》2011年第4期88-91,共4页Clean Coal Technology

基　　金：国家自然科学基金重点项目(40730422);国家科技重大专项(2008ZX05034-001)

摘　　要：在对黔西滇东地区34个上二叠统龙潭组煤样进行压汞测试分析及扫描电镜观察的基础上,从孔隙度、各孔径段孔隙分布、各孔径段孔隙对孔隙度的贡献以及煤级对孔隙发育的影响4个方面对煤孔隙特征进行系统分析。研究表明:研究区煤孔隙度具有北低南高、东低西高的特征;煤孔隙以小微孔为主,大孔和中孔发育程度相当;随着孔隙度的增加,各孔径段孔隙贡献率的增加速率存在差异,以大孔贡献率的增加最为明显;孔隙度随煤级的增加呈"M"型波状变化,趋势变化的3个拐点分别对应Ro值的0.8%,1.4%,2.6%。On the basis of the mercury-injection tests and scanning electron microscope observations of 34 coal samples which are derived from Upper Permian Longtan Formation in western Guizhou and eastern Yunnan, the coal pore characteristics is analyzed systematically in aspects of porosity, the distribution of the pore configuration, the contribution of each kind of pore to porosity and the effect of coal rank on pore. The results show that the porosity in the study area is increasing from north to south, and from east to west;the pore with the largest proportion is micro- porous, and the proportion of macroporous and mesoporous are close;the increasing rate of contribution from each kind of pore is different with the increasing of porosity, and the increasing rate from macroporous is highest; with the increasing of coal rank,the porosity is changing with the shape of M,whose inflection points are at 0.8% , 1.4% and 2.6% of R.

关 键 词：黔西滇东 压汞测试 孔隙特征 煤级 

分 类 号：P618.11[天文地球—矿床学] TD849[天文地球—地质学]