摘要
羌塘盆地为青藏高原上面积最大的一个中生代海相残留盆地,以三叠系和侏罗系为主要目的层,迄今为止已发现200多处油气显示和一个古油藏。埋藏史及热演化史分析认为,盆地至少发生过2次油气生成过程,第一次在侏罗纪晚期—白垩纪晚期,第二次在新近纪。盆地发育4套储盖组合,中侏罗统布曲组—夏里组为最有利的组合。通过对盆地油气显示的分析及古油藏解剖,初步认为盆地的油气储盖组合可能主要为自生自储型,后期的保存是最关键的控制因素。
Qiangtang basin is the biggest Mesozoic marine residual basin;its main targets cover the Triassic and Jurassic. Up to present,more than 200 oil and gas shows and a destroyed oil reservoir are discovered. According to burial and thermal evolution history, the basin has at least two times of hydrocarbon genera- tion ,one is the late Jurassic to late Cretaceous,the other is late Tertiary. The middle Jurassic Buqu-Xiali as- semblage is the most favorable one in the four reservoir-cap assemblages. Based on analysis of oil and gas shows and destroyed oil reservoir, we point out that the reservoir-cap assemblage should be self-generation and self-reservoir, and the late conservation is fate for oil and gas accumulation.
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2012年第3期469-473,共5页
Natural Gas Geoscience
关键词
构造背景
成藏条件
生储盖组合
油气显示
羌塘盆地
Tectonic background
Accumulation condition
Source-reservoir-cap assemblage
Oil and gasshows
Qiangtang basin.
