珠二坳陷湖相烃源岩形成条件分析  

A study on development conditions of lacustrine source rocks in Zhu Ⅱdepression, Pearl River Mouth basin

作　　者：庞雄 何敏 朱俊章 朱明 代一丁 李劲松 连世勇 

机构地区：[1]中海石油(中国)有限公司深圳分公司

出　　处：《中国海上油气》2009年第2期86-90,94,共6页China Offshore Oil and Gas

基　　金：国家自然科学基金委员会与中国海洋石油总公司联合资助重点项目"南海深水扇系统及油气资源"(项目批准号:40238060);国家科技重大专项(2008ZX05025-03)部分研究成果

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。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 environ- ments 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.

关 键 词：珠二坳陷 白云凹陷 中—深湖相 烃源岩 形成条件 生烃潜力 

分 类 号：TE112.1[石油与天然气工程—油气勘探] P618.130.2[天文地球—矿床学]