石油实验地质2017，Vol.39Issue(1)：50-57,8.DOI:10.11781/sysydz201701050
四川盆地川西坳陷东坡沙溪庙组油气成藏关键时刻研究
Key moments for hydrocarbon accumulation in Shaximiao Formation on the eastern slope of West Sichuan Depression, Sichuan Basin
摘要
Abstract
The West Sichuan Depression in the Sichuan Basin is a foreland basin formed under the compressional thrusting of the Longmen Mountain. 3D seismic was obtained on five exploration blocks on the eastern slope of the central depression, including Hexingchang-Gaomiaozi, Fenggu, Yongtai, Zhongjiang-Huilong and Zhixinchang-Shiquanchang, covering three tectonic belts. The hydrocarbon evolution history of source rocks was studied, and 22 fluid inclusion samples from 6 wells were analyzed using fluorescence, homogenization temperature and salinity measurements. Source rocks in the fifth member of the Upper Triassic Xujiahe Formation entered the hydrocarbon generation threshold at 151-145 Ma, and reached a peak at 130 Ma. Three stages of fluid activities related to hy⁃drocarbon accumulation took place in sandstone reservoirs in the Jurassic Shaximiao Formation at 141-128 Ma ( J3-K1 ) , 105-88 Ma ( K1-K2 ) and 83-68 Ma ( K2 ) , respectively. The peak of hydrocarbon generation of source rocks at 130-68 Ma ( K1-K2 ) is the key moment for hydrocarbon accumulation.关键词
流体包裹体/均一温度/油气成藏/沙溪庙组/川西坳陷/四川盆地Key words
fluid inclusion/homogenization temperature/hydrocarbon accumulation/Shaximiao Formation/West Sichuan Depression/Sichuan Basin分类
能源科技引用本文复制引用
林小云,魏民生,丰勇,李璐,韩艳..四川盆地川西坳陷东坡沙溪庙组油气成藏关键时刻研究[J].石油实验地质,2017,39(1):50-57,8.基金项目
国家科技重大专项“海相碳酸盐岩油气资源潜力与大油气田形成条件、分布规律研究”（2011ZX05004－001）资助。 （）
