石油学报 ›› 2019, Vol. 40 ›› Issue (1): 56-66.DOI: 10.7623/syxb201901004

• 地质勘探 • 上一篇    下一篇

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

汪旭东, 张向涛, 林鹤鸣, 阙晓铭, 贺勇, 贾连凯, 肖张波, 李敏   

  1. 中海石油(中国)有限公司深圳分公司 广东深圳 518000
  • 收稿日期:2018-04-19 修回日期:2018-08-03 出版日期:2019-01-25 发布日期:2019-01-29
  • 通讯作者: 汪旭东,男,1986年3月生,2008年获中国石油大学(华东)学士学位,2011年获中国石油大学(华东)硕士学位,现为中海石油(中国)有限公司深圳分公司研究院工程师,主要从事石油天然气地质和综合研究工作。Email:wangxd6@cnooc.com.cn
  • 作者简介:汪旭东,男,1986年3月生,2008年获中国石油大学(华东)学士学位,2011年获中国石油大学(华东)硕士学位,现为中海石油(中国)有限公司深圳分公司研究院工程师,主要从事石油天然气地质和综合研究工作。Email:wangxd6@cnooc.com.cn
  • 基金资助:

    国家科技重大专项(2016ZX05024-004)和中国海洋石油总公司综合科研项目(YXKY-2015-SZ-02)资助。

Geological structure characteristics of central anticline zone in Lufeng 13 subsag, Pearl River Mouth Basin and its control effect of hydrocarbon accumulation

Wang Xudong, Zhang Xiangtao, Lin Heming, Que Xiaoming, He Yong, Jia Liankai, Xiao Zhangbo, Li Min   

  1. Shenzhen Branch, CNOOC China Limited, Guangdong Shenzhen 518000, China
  • Received:2018-04-19 Revised:2018-08-03 Online:2019-01-25 Published:2019-01-29

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。

关键词: 地质结构, 构造演化, 油气成藏, 中央背斜带, 陆丰凹陷

Abstract:

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, structural-stratigraphic 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.

Key words: geological structure, tectonic evolution, hydrocarbon accumulation, central anticline zone, Lufeng sag

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