【摘要】 为精细表征页岩储层微孔结构,采用低温二氧化碳吸附法,测定了临兴地区石炭系上统太原组和二叠系下统山西组页岩样品二氧化碳吸附等温线,计算并对比了山西组和太原组页岩的比表面积、单分子层吸附面积、总孔容等孔隙结构参数,探讨了页岩微孔发育的控制因素。研究表明:临兴地区山西组和太原组页岩微孔较为发育,页岩TOC含量越高,微孔比表面积越大,黏土矿物含量越丰富,总孔容越大;热成熟度对临兴地区页岩微孔发育影响不大。受沉积环境的影响,陆相的山西组页岩有机质、黏土矿物含量较海相的太原组页岩更高,因而山西组页岩具有更大的比表面积和总孔容,页岩气的吸附存储能力更强。更多还原

【Abstract】 In order to finely characterize the shale reservoir micropore structures,the method of low-temperature carbon adsorption is adopted to measure the adsorption isotherms of upper Carboniferous Taiyuan-Formation and lower Permian Shanxi-Formation shale samples from Linxing area.And moreover,their pore structural parameters such as specific surface areas,monolayer adsorption areas,total pore volumes etc.are calculated and compared.Finally the controlling factors of the micropore development are explored and discussed.The researches show that their micropores are well-developed,the more content of TOC is,the larger the pore specific surface area will be,the richer the content of the clay minerals is,the larger the micropore total pore volume will be;there is not serious influence for the thermal maturity on the above development in the area.Controlled by the influences of the sedimentary environment,the organic matter and clay mineral contents of continental Shanxi-Formation shale are higher than those of the marine Taiyuan-Formation shale;therefore the specific surface area and total pore volume become much larger and so stronger for the adsorption storage capacity of the shale gas.更多还原