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珠江口盆地陆丰13洼陷中央背斜带地质构造特征及对油气成藏的控制作用
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  • 英文篇名:Geological structure characteristics of central anticline zone in Lufeng 13 subsag,Pearl River Mouth Basin and its control effect of hydrocarbon accumulation
  • 作者:汪旭东 ; 张向涛 ; 林鹤鸣 ; 阙晓铭 ; 贺勇 ; 贾连凯 ; 肖张波 ; 李敏
  • 英文作者:Wang Xudong;Zhang Xiangtao;Lin Heming;Que Xiaoming;He Yong;Jia Liankai;Xiao Zhangbo;Li Min;Shenzhen Branch,CNOOC China Limited;
  • 关键词:地质结构 ; 构造演化 ; 油气成藏 ; 中央背斜带 ; 陆丰凹陷
  • 英文关键词:geological structure;;tectonic evolution;;hydrocarbon accumulation;;central anticline zone;;Lufeng sag
  • 中文刊名:SYXB
  • 英文刊名:Acta Petrolei Sinica
  • 机构:中海石油(中国)有限公司深圳分公司;
  • 出版日期:2019-01-15
  • 出版单位:石油学报
  • 年:2019
  • 期:v.40
  • 基金:国家科技重大专项(2016ZX05024-004);; 中国海洋石油总公司综合科研项目(YXKY-2015-SZ-02)资助
  • 语种:中文;
  • 页:SYXB201901004
  • 页数:11
  • CN:01
  • ISSN:11-2128/TE
  • 分类号:60-70
摘要
利用高分辨率地震资料和最新钻井资料,对珠江口盆地陆丰13洼陷中央背斜带的古近系地质结构及演化过程进行了分析,并探讨了构造演化对油气成藏的控制作用。研究结果表明,陆丰13洼陷中央背斜带发育上、下2个变形层,其上变形层发育"拱张地堑系",下变形层主要发育岩浆底辟构造和塑性岩层流动变形。中央背斜带的形成演化过程主要经历了块断抬斜阶段、雏形阶段、强化阶段和定型阶段共4个阶段。中央背斜带地质结构及构造演化对古近系油气成藏的控制作用主要表现在3个方面:古近系双层地质结构有利于构造圈闭及构造-地层、构造-岩性等复合圈闭的发育;古构造高部位是重要的油气汇聚指向区,重力滑动断裂是油气发生垂向运移的主要输导体系;构造演化还控制了文昌组有利储层的形成及分布。
        Based on high-resolution seismic data and updated drilling results,this study analyzes the geological structure and evolution process of the Paleogene formation in the central anticline zone of Lufeng 13 subsag,Pearl River Mouth Basin,as well as the control effect of tectonic evolution on hydrocarbon accumulation.The research results indicate that upper and lower deformation layers are developed in the central anticline zone of Lufeng 13 subsag,of which the upper deformation layer is developed with"arched graben system",and the lower deformation layer is mainly developed with magmatic-diapiric tectonics and plastic bed flow.The formation and evolution of central anticline zone has gone through 4 stages,i.e.,faulted block tilting stage,preliminary stage,enhanced stage and permanent stage.The control effect of geological structure and tectonic evolution in central anticline zone on hydrocarbon accumulation is reflected in three aspects.First,the Paleogene dual geological structures are beneficial to the development of structural trap,structuralstratigraphic and structural-lithological composite traps.Second,the high point of paleo-structure was the indicating area for hydrocarbon migration and accumulation,and the faults caused by gravity sliding is the main conduction system for vertical hydrocarbon migration.Third,the formation and distribution of favorable reservoir in Wenchang Formation are also controlled by tectonic evolution.
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