全球典型被动陆缘盆地油气成藏特征

以被动陆缘油气富集理论为指导,通过研究南大西洋和印度洋被动陆缘盆地油气地质条件,分析油气差异富集因素。研究结果表明:被动陆缘盆地主要发育3套含油气系统,其中印度洋地区主要发育克拉通陆内裂谷期含油气系统,裂陷期含油气系统,漂移期含油气系统。南大西洋地区主要发育裂陷期含油气系统,漂移早期含油气系统和漂移晚期含油气系统。根据不同油气成藏特征,总结为10类成藏模式,不同成藏模式发育背景和成藏主控因素各异。为被动陆缘盆地不同构造沉积演化阶段油气勘探方向提供研究基础,对相关或类似盆地勘探研究提供借鉴。

Characteristics of hydrocarbon accumulation within typical passive continental margin basins in the world

Guided by the theory of passive continental margin petroleum enrichment,hydrocarbon assemble factors have been analyzed through studying petroleum geology of the passive continental margin basins around South Atlantic and the Indian Ocean.The results show that there are three sets of petroleum systems developed in the passive continental margin basins,while the craton intracontinental rift petroleum system,rift-sag petroleum system and drift petroleum system developed in the passive continental margin basins around Indian Ocean,as well as the rift-sag petroleum system,early-drift petroleum system and late-drift petroleum system developed in the passive continental margin basins around South Atlantic.It can be summarized as ten types of hydrocarbon accumulation models according to the different accumulation conditions.They have the different development background and main controlling factors,which could provide the research basement for petroleum exploration directions of different tectonic and sedimentary evolution stages of the passive continental margin basins.There is reference significance for exploration research in related or similar basins.