页岩中有机质与黏土矿物对甲烷吸附能力的探讨  

Comparison and explanation of the absorptivity of organic matters and clay minerals in shales

作　　者：张寒[1,2] 朱炎铭[1,2] 夏筱红[1] 胡琳[1] 陈洁[1] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221116 [2]中国矿业大学煤层气资源与成藏过程教育部重点实验室,江苏徐州221116

出　　处：《煤炭学报》2013年第5期812-816,共5页Journal of China Coal Society

基　　金：国家重点基础研究发展计划(973)资助项目(2012CB214702);国家自然科学基金资助项目(41272155)

摘　　要：以南方中下扬子地区高—过成熟页岩样品为研究目标,通过低温液氮吸附、压汞实验等孔隙分析手段,以及等温吸附实验等,利用SPSS软件分析TOC含量、成熟度、黏土矿物含量对样品吸附能力的影响,得出TOC含量、成熟度Ro、黏土矿物含量对样品最大吸附量的影响系数分别为0.326,-0.061,0.028。其中TOC含量、黏土矿物含量的增加对提升样品吸附能力具有正面作用。利用X射线衍射、扫描电镜对样品成分、形貌进行分析,结果指示有机质面孔率明显高于矿物基质,与伊利石相比,伊蒙混层具有良好的多孔性与联通性。Based on the samples of over-high matured outcropping shales in Middle-Lower Yangtze,using the nitrogen adsorption,the mercury immersion experiment and the isothermal adsorption experiment,as well as the SPSS software,authors analyzed the influence of TOC,maturity,clay mineral composition on the absorptivity.The study show that the influence indexes of these three factors are 0.326,-0.061 and 0.028 respectively.Among these factors,the increases of TOC and clay mineral content have positive effect on the absorptivity.The XRD,SEM and other methods are used to analyze the composition and morphology.The results show that the organic matter has higher porosity than that of the mineral matrix.Comparing with illite,I/S minerals have a better gas storage capacity.

关 键 词：页岩 吸附态 成熟度 TOC 黏土矿物 

分 类 号：P618.13[天文地球—矿床学]