海相油气地质2018，Vol.23Issue(1)：63-74,12.DOI:10.3969/j.issn.1672-9854.2018.01.008
渝东南彭水地区龙马溪组页岩孔隙结构特征及吸附性能控制因素
Pore Structure of Shale and Controlling Factors of Adsorption Performance of Longmaxi Formation in Pengshui Area,Southeast Chongqing
摘要
Abstract
Based on the experiment of SEM, FESEM and NMR, and combined with the experiment of N2gas adsorption and isothermal adsorption of methane, the control factors of adsorption capacity of Silurian Longmaxi Shale in Pengshui area, Southeast Chongqing, were discussed. It is shown that organic matter pores and clay mineral pores are mainly developed in shale.The meso-pores account for about 73.5% of shale pore, and the micro-pores and macro-pores account for 13.4% and 13.1% respectively. The meso-pores(2~5nm) make major contribution to the pore volume. The pore structure of shale is irregular, mostly made up of slit pores parallelling the palte of structure. It is concluded that organic matter content is a key factor to control the development of shale pore and the adsorption capacity. There is a weak correlation between shale pore and mineral composition. The adsorption capacity of shale has a positive correlation with specific surface area,pore volume and organic matter content. And it also has a weak positive correlation with clay mineral content and has a weak negative correlation with brittle mineral content.关键词
渝东南/彭水地区/龙马溪组/页岩/孔隙结构/吸附性能Key words
Shale/Pore structure/Adsorption capacity/Longmaxi Formation/Pengshui area/Southeast Chongqing分类
能源科技引用本文复制引用
孙寅森,郭少斌..渝东南彭水地区龙马溪组页岩孔隙结构特征及吸附性能控制因素[J].海相油气地质,2018,23(1):63-74,12.基金项目
本文受国家科技重大专项"不同类型页岩气生成机理与富集规律研究"(编号:2016ZX05034-001)资助 （编号:2016ZX05034-001）
