石油学报 ›› 2007, Vol. 28 ›› Issue (4): 36-40.DOI: 10.7623/syxb200704007

• 地质勘探 • 上一篇    下一篇

珠江口盆地断层封堵特征及其影响因素

孙龙涛1,3, 陈长民2, 詹文欢1, 申俊2, 柳保军2, 吴湘杰2   

  1. 1. 中国科学院边缘海地质重点实验室 南海海洋研究所 广东广州510301;
    2. 中海石油(中国)有限公司深圳分公司技术部 广东广州510240;
    3. 中国科学院研究生院北京100039
  • 收稿日期:2006-05-17 修回日期:2006-07-14 出版日期:2007-07-25 发布日期:2010-05-21
  • 作者简介:孙龙涛,男,1978年11月生,2006年获中国科学院南海海洋研究所博士学位,现为南海海洋研究所助理研究员,主要从事海洋地质及石油地质研究.E-mail:ltsun@scsio.ac.cn
  • 基金资助:
    国家自然科学基金项目(No.40476026);国家自然科学基金重点项目(No.40238060);广东省自然科学基金项目(No.04001309)联合资助

Characteristics and influencing factors of fault sealing in Pearl River Mouth Basin

Sun Longtao1,3, Chen Changmin2, Zhan Wenhuan1, Shen Jun2, Liu Baojun2, Wu Xiangjie2   

  1. 1. Key Laboratory for Marginal Sea Geology in Oceanic Institute of South China Sea, Chinese Academy of Sciences, Guangzhou 510301, China;
    2. Technology Department of CNOOC China Ltd. Shenzhen, Guangzhou 510240, `China;
    3. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
  • Received:2006-05-17 Revised:2006-07-14 Online:2007-07-25 Published:2010-05-21

摘要: 珠江口盆地在南东—近南北向拉张应力的作用下形成了北西、近东西和北东向3组断层,其中以正断层为主,正、反向正断层共存。断层两盘的毛管压力差与油气排替压力的关系决定了断层的封堵能力,不同性质的断层在流体运移过程中的作用不同,同一断层在不同时期对流体的控制作用也不同。对珠江口盆地断层的形成机制、发育特征、断面内部结构和应力状态进行了研究,对珠江口盆地断层封堵的特点及其影响因素进行了综合分析。结果表明,封堵盘泥岩含量是断块构造封堵成藏的主要因素,同时断层的断距、起伏状态、走向、倾角、活动时间及次生后期断层均对断层的封堵能力有一定的影响。

关键词: 珠江口盆地, 断层, 圈闭, 封堵能力, 影响因素, 构造成藏

Abstract: Three groups of faults in north-west,east-west and north-east directions were generated in the Pearl River Mouth Basin under the extending stress in the south-east to south-north trending.The faults are almost the normal faults,and the positive and negative normal faults are coexistence.The sealing capacity of the faults is decided by the difference between threshold pressure and the displacement pressure of hydrocarbon.The different faults have the different effect on the fluid migration,and the same fault as a pathway for hydrocarbon migration at the different time has different capability.It is generally considered that the active fault is open and the stable fault is close.The analyses on the characteristics and the influencing factors for the fault sealing,and the study of stress,inner structure,deformation mechanism of the faults show that the content of clay is the key factor controlling the fault trap with hydrocarbon accumulation.At the same time,fault throw,fault trend,obliquity,activity time and subsequent small fault are also the affecting factors for fault traps in the Pearl River Mouth Basin.

Key words: Pearl River Mouth Basin, fault, trap, sealing capacity, influencing factor, tectonic reservoir

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