摘要
对鄂纵错地区羌资6井上三叠统储集层样品进行包裹体镜下显微观察、荧光分析和均一温度、盐度测量,结合埋藏史研究,结果表明:研究区发生过4期油气充注,第1期成藏时间为中侏罗世中期(168.1~162.5 Ma);第2期成藏时间为中侏罗世中期到晚侏罗世晚期(162.5~145.3 Ma);第3期成藏时间为晚侏罗世晚期到早白垩世早期(145.3~139.6 Ma);第4期成藏时间为中新世中期(16.3~9.6 Ma)。第1期为少量低成熟度油充注,第2和第3期为较高成熟度油气充注,第4期为凝析油和天然气充注,其中,第2和第3期是该区上三叠统地层最主要的成藏期。
In this research, fluid inclusion samples from QZ-6 of the Upper Triassic Formation in the Ezongcuo Area of Qiangtang Basin have been analyzed to measure the fluorescent indicator, the occurrence, homogenization temperature and salinity. The result indicates that there are four times of thermal fluid flow. By burial historical curves, the four large scale processes of hydrocarbon generation, migration and accumulation happened sequentially in the Middle Middle Jurassic period(168.1-162.5 Ma), the Middle Middle Jurassic period to the Late Late Jurassic period(162.5-145.3 Ma), the Late Late Jurassic period to Early Early Cretaceous period(145.3-139.6 Ma) and the Middle Miocene(16.3-9.6 Ma). The first period is a little low maturity oil filling, the second and the third are high maturity oil and gas injection, and the fourth period is condensate oil and gas injection. The second and the third periods are the most important accumulation periods of the Upper Triassic in this area.
出处
《断块油气田》
CAS
北大核心
2018年第1期52-56,共5页
Fault-Block Oil & Gas Field
基金
国家自然科学基金项目"羌塘盆地海相油页岩:沉积古环境
古气候及源区"(41172098)
中国地质调查局项目"羌塘盆地金星湖-隆鄂尼地区油气资源战略调查"(DD20160159)
中石化勘探分公司项目"北羌塘坳陷中生界沉积储层特征研究"(G0800-15-KK-051)
关键词
上三叠统
流体包裹体
油气成藏
鄂级错地区
羌塘盆地
Upper Triassic
fluid inclusion
hydrocarbon accumulation
Ezongcuo Area
Qiangtang Basin
