石油与天然气地质 ›› 2009, Vol. 30 ›› Issue (4): 431-437.doi: 10.11743/ogg20090407

• 古近系层序地层与隐蔽圈闭 • 上一篇    下一篇

辽东湾坳陷古近系东营组泥岩对油气藏分布的控制作用

徐长贵1, 朱秀香2,3, 史翠娥2,3, 王海军2,3   

  1. 1. 中海石油(中国)有限公司, 天津分公司, 天津, 300452;
    2. 中国石油大学盆地与油藏研究中心, 北京, 102249;
    3. 中国石油大学油气成藏机理教育部重点实验室, 北京, 102249
  • 收稿日期:2009-05-08 出版日期:2009-08-25 发布日期:2012-01-16
  • 基金资助:

    中海石油(中国)有限公司重点科技攻关项目(SC06TJ-TQL-004).

Control of the Dongying Formation mudstone upon the distribution of hydrocarbon accumulations in the Liaodong Bay Depression

Xu Changgui1, Zhu Xiuxiang2,3, Shi Cui'e2,3, Wang Haijun2,3   

  1. 1. CNOOC Tianjin Company, Tianjin 300452, China;
    2. Research Center for Basins and Reservoirs, China University of Petroleum, Beijing 102249, China;
    3. Key Laboratory for Hydrocarbon Accumulation Mechanism, Ministry of Education, China University of Petroleum, Beijing 102249, China
  • Received:2009-05-08 Online:2009-08-25 Published:2012-01-16

PDF (PC)

820

被引次数

39

摘要：

辽东湾坳陷位于渤海湾盆地东北部,油气聚集层位从北向南逐渐变新,北部和中部大部分油气藏都分布于古近系东营组和沙河街组地层中,油气藏的这种分布特点与坳陷中"北厚南薄"的东营组泥岩有着密切的关系.结合辽东湾坳陷构造特征、沉积体系演化及地层发育特点,通过对东营组泥岩产生的超压,及泥岩和砂体、断层、不整合面等疏导体系的配置的研究,探讨了辽东湾坳陷东营组泥岩对油气藏分布的控制作用.东营组泥岩与断层、油源、砂体等多种因素联合通过5种作用控制了坳陷内油气藏的分布.其中巨厚泥岩产生的超压对北部和中部油气藏的控制作用最为明显,油气藏主要分布于东营组及下伏地层中.

关键词: 超压体系, 泥岩盖层, 油气藏, 东营组, 辽东湾坳陷, 渤海湾盆地

Abstract:

The Liaodong Bay depression is located in northeastern Bohai Bay Basin.Hydrocarbon-bearing layers in the depression present a trend of becoming younger from north to south.Most hydrocarbon accumulations in the northern and central parts of the depression are distributed in the Dongying and Shahejie formations—a pattern closely related with the mudstone (thicker in the north and thinner in the south) in the Dongying Formation.Considering the structural features,evolution of depositional systems,and formation development in the Liaodong Bay depression,we studied the overpressure created by the mudstone in the Dongying Formation and the configurations of the mudstone with carrier systems such as sand bodies,faults,unconformities,and discussed the controlling effect of the mudstone on hydrocarbon accumulations in the Liaodong Bay depression.The result shows that the mudstone,together with faults,oil sources and sandbodies,control the distribution of oil and gas accumulations.Of these factors,the overpressure created by the thick mudstone has a strong presence in affecting the distribution of accumulations in the northern and central parts of the depression,causing most of them occurring in the Dongying Formation and its underlying layers.

Key words: overpressure system, mudstone seal, hydrocarbon reservoir, Dongying Formation, Liaodong Bay Depression, Bohai Bay Basin

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