石油实验地质2016，Vol.38Issue(2)：211-218,8.DOI:10.11781/sysydz201602211
江汉盆地潜江凹陷潜江组盐间页岩油储层矿物组成与脆性特征研究
Mineral composition and brittleness characteristics of the inter-salt shale oil reservoirs in the Qianjiang Formation, Qianjiang Sag
摘要
Abstract
Core samples of shales from the second ( Eq2 ) , third ( Eq3 ) and fourth ( Eq4 ) members of the Qian⁃jiang Formation in the Qianjiang Sag were analyzed using X⁃ray diffraction ( XRD ) analyses to determin their mineral composition, brittleness and geochemical characteristics. The results showed that the shales from different formations have different mineral compositions and geochemical characteristics. The shales in Eq2 have sapropelic organic matter. The TOC content averages 1.38%. The Ro value ranges from 0.26%-0.5%, indicating an immature to low⁃maturity thermal evolution stage. Evaporite rocks are in high content. The shales in Eq3 have sapropelic and humic⁃sapropelic organic matter. The TOC content averages 2.53%. The Ro value ranges 0.5%-0.88%, indicating a low to medium⁃maturity thermal evolution stage. Quartz and clay minerals are in high content. The shales in Eq4 have sapropelic and humic⁃sapropelic organic matter. The TOC content averages 0. 69%. The Ro value ranges 0.55%-1.3%, indicating a medium⁃maturity to mature thermal evolution stage. Carbonate minerals are in high content. The inter⁃salt shales in the Qianjiang Formation are characterized by “low clay content, low quartz content, high carbonate content, and low brittle mineral content” compared to those in the USA and other regions in China. The shales in Eq3 have higher brittle mineral content ( average 56%) and higher brittleness index ( average 75.3%) , which show excellent exploration potential.关键词
矿物组成/脆性矿物/页岩/储层/潜江组/潜江凹陷/江汉盆地Key words
mineral composition/brittle mineral/shale/reservoir/Qianjiang Formation/Qianjiang Sag/Jianghan Basin分类
石油、天然气工程引用本文复制引用
王芙蓉,何生,郑有恒,侯宇光,吴世强..江汉盆地潜江凹陷潜江组盐间页岩油储层矿物组成与脆性特征研究[J].石油实验地质,2016,38(2):211-218,8.基金项目
国家自然科学基金青年基金项目（41302111）资助。 （）
