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Paleogene geological framework and tectonic evolution of the central anticlinal zone in Lufeng 13 sag,Pearl River Mouth Basin

查看全文 作　　者：Xudong [1]Wang;Xiangtao [1]Zhang;Heming [1]Lin;Xiaoming [1]Que;Yong [1]He;Liankai [1]Jia;Zhangbo [1]Xiao;Min [1]Li 高影响力作者 机构地区：[1]Shenzhen Branch,CNOOC China Limited,Guangdong,518000,China高影响力机构 出　　处：《Petroleum Research》索引2019年第4卷第3期,共12页高影响力期刊 基　　金：supported by the National Science and Technology Major Project of China(No.2016ZX05024-004);comprehensive scientific research project of CNOOC(China National Offshore Oil Corporation)(YXKY-2015-SZ-02). 摘　　要：The Paleogene geological framework and evolution process in the central anticline zone in the Lufeng 13 sag in Pearl River Mouth Basin is well analyzed through seismic data and drilling data,and control of tectonic evolution on hydrocarbon accumulation is also discussed.The results show that the central anticline zone in the Lufeng 13 sag develops the upper deformation layer and lower deformation layer.The“arched graben system”is developed in the upper deformation layer,and the magmatic diapir structure and flowing deformation of plastic strata is developed in the lower deformation layer.The evolution process of the central anticline zone can be divided into four stages,i.e.fault block uplifting stage,prototype stage,strengthening stage and finalization stage.The geological framework and tectonic evolution of the central anticline zone control Paleogene hydrocarbon accumulation.The Paleogene twolayer geological framework is favorable for development of structural traps and composite traps;the paleostructure highs are the direction of hydrocarbon migration,and the gravitational gliding faults are the main carrier bed for vertical hydrocarbon migration;the tectonic uplift is a key factor for reservoir diagenesis improvement and preservation of primary pores,and also controls distribution of high-quality reservoirs. 关 键 词：Geological framework Upper and lower deformation layers Gravitational gliding faults Hydrocarbon migration and accumulation Carrier bed The central anticline zone Lufeng sag
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