石油实验地质2018，Vol.40Issue(1)：97-102,6.DOI:10.11781/sysydz201801097
四川盆地涪陵地区龙马溪组页岩微观孔隙结构定性定量研究
Qualitative and quantitative study of micro-pore structures of Longmaxi Formation shale in Fuling area, Sichuan Basin
摘要
Abstract
The pore structure of Longmaxi shale in Fuling area of the Sichuan Basin is so complicated that con-ventional single test technology fails to accurately characterize the microscopic shale pores. The multi-scale micro-cosmic pore structure of Longmaxi shale in Fuling area was studied using SEM of an argon ion polished surface, pressure mercury-nitrogen adsorption, and nuclear magnetic resonance ( NMR) analyses. The shale reservoirs in Jiaoshiba mainly contain gray black to black argillaceous siltstones and silty mudstones with three pore types:organic and inorganic pores, and micro-cracks. The pore size distribution of shale is of multiple-scales, most of which are micro pores and meso pores. Pore diameter < 20 nm accounts for over 80％ of the total. Quantitative NMR analysis showed that the main layer pore radius of Longmaxi Formation shale is significantly greater than the non-main layer. The pore size distribution increased with well depth. On the plane, the areas where the pore diameter peak value of the main layer shale is> 2 nm, the porosity is> 3％, and the water saturation of < 40％showed favorable reservoir preservation conditions.关键词
核磁共振/纳米孔隙/有机质/微观孔隙结构/页岩/龙马溪组/涪陵地区/四川盆地Key words
nuclear magnetic resonance ( NMR )/nano pore/organic matter/microscopic pore structure/shale/Longmaxi Formation/Fuling area/Sichuan Basin分类
能源科技引用本文复制引用
杨文新,李继庆,赵江艳,黄志红..四川盆地涪陵地区龙马溪组页岩微观孔隙结构定性定量研究[J].石油实验地质,2018,40(1):97-102,6.基金项目
国家科技重大专项(2016ZX05060)和中国石化科技项目(P17014-1)资助. （2016ZX05060）
