【摘要】 珠二坳陷位于珠江口盆地南部,其主体位于南海现今陆架坡折带以外的深水陆坡区。通过古气候条件、古地理环境和典型地震相的综合分析,认为始新世—早渐新世断陷期珠二坳陷具有形成大型湖泊和发育大规模中—深湖相烃源岩的地质条件。从形成与演化历史、沉积环境和地震相特征来看,珠二坳陷与珠一坳陷存在可对比性,其文昌组中—深湖相烃源岩应该具有良好的生烃潜力;近几年白云凹陷周边实钻资料也证实了恩平组中—深湖相烃源岩的生烃潜力。因此,白云深水区有着大油气区的勘探前景。更多还原

【Abstract】 Zhu Ⅱ depression is in the southern Pearl River Mouth basin,and its main part extends into a deep continental slope area beyond the current shelf break in South China Sea.By an integrated analysis of palaeoclimate,palaeogeography and typical seismic facies,it is considered that there are geological conditions to form large lakes and to develop widely source rocks of middle-deep lacustrine facies during the Eocene—early Oligocene rifting in Zhu Ⅱ depression.In terms of formation and evolution history,depositional environments and seismic facies,Zhu Ⅱ depression can be correlated with Zhu Ⅰ depression,and its Wenchang Formation source rocks of middle-deep lacustrine facies should have a good potential of hydrocarbon generation.For the Enping Formation source rocks of middle-deep lacustrine facies,this potential has been validated by recent drilling data around Baiyun sag.Therefore,the deep water area of Baiyun sag should have an exploration potential of large hydrocarbon province.更多还原