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DIFFERENCE IN AGES OF PETROLEUM GENERATION AND ACCUMULATION IN THE JURASSIC BETWEEN THE YANQI AND QAIDAM BASINS
Author(s): 
Pages: 361-366
Year: Issue:  3
Journal: CHINESE JOURNAL OF GEOLOGY

Keyword:  侏罗系油气系统油气成藏时期油气成藏模式包裹体焉耆盆地柴达木盆地;
Abstract: 焉耆盆地和柴达木盆地都发育侏罗系烃源岩,形成侏罗系油气系统.由于中-新生代两者构造运动强度的不同,导致两者油气形成时期、油气运移成藏时期以及油气分布层系不同.根据烃源岩热模拟结果和储层包裹体特征的研究,证明焉耆盆地侏罗系油气系统生烃时期主要发生在中-晚侏罗世,油气成藏时期主要发生在中-晚燕山期,为早期一期成藏;柴达木北缘则分别在早侏罗世晚期-晚侏罗世早期和早第三纪末-晚第三纪早期发生了2次生油过程,因此存在2期油气成藏,但以晚期为主.两盆地分别是中国西北侏罗系油气系统早期成藏和晚期成藏的典型代表.
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