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现代地质 ›› 2008, Vol. 22 ›› Issue (2): 264-272.

• 能源地质学 • 上一篇    下一篇

渤海湾盆地南堡凹陷滩海地区奥陶系原油油源分析

赵彦德1,刘洛夫1,张枝焕1,王旭东2,梅玲1,李燕1,陈蕾2   

  1. 1中国石油大学 资源与信息学院,北京102249;2中国石油 冀东油田公司勘探开发研究院,河北 唐山063004
  • 收稿日期:2007-12-20 修回日期:2008-02-20 出版日期:2008-02-20 发布日期:2008-02-20
  • 作者简介:赵彦德,男,博士研究生,1973年出生,矿物学、岩石学、矿床学专业,主要从事沉积与有机地化方面的研究工作。 Email:zhaoyande001@yahoo.com.cn

Source Analysis of Oils from the Ordovician in the Shoal Zone, Nanpu Sag, Bohai Bay Basin

ZHAO Yan-de1, LIU Luo-fu1, ZHANG Zhi-huan1, WANG Xu-dong2,MEI Ling1, LI Yan1,CHen lei2   

  1. 1Faculty of Geoscience, China University of Petroleum, Beijing102249, China;
    2Jidong Oilfield Company,CNPC, Tangshan,Hebei063004,China
  • Received:2007-12-20 Revised:2008-02-20 Online:2008-02-20 Published:2008-02-20

摘要:

近年来渤海湾盆地南堡凹陷的油气勘探取得了重大突破。在滩海区奥陶系古潜山钻遇工业性高产油气流,使奥陶系古潜山成为南堡油田重要勘探目的层之一,但目前对奥陶系主要产油层中油气的来源问题仍存在着不同的认识。通过对奥陶系原油与古近系沙三段、沙一段和东三段3套烃源岩的地球化学特征进行对比研究,并结合奥陶系油气成藏特征,探讨了奥陶系原油的油源。结果表明:南堡油田奥陶系原油生物标志化合物特征和稳定碳同位素组成与沙三段烃源岩的相似,二者具有较好的亲缘关系;同时,区域性的不整合面、油源断层可以成为沟通奥陶系古潜山储层与沙三段油源的运移通道;奥陶系原油主要来源于沙三段烃源岩。

关键词: 南堡凹陷, 奥陶系, 烃源岩, 油源分析, 沙三段

Abstract:

The Ordovician Formation is the main oil reservoir of deep strata in the Nanpu oilfield in the northern Huanghua depression, Bohai Bay basin.At present, there are some different points of views about the distribution of the source rocks contributing to this reservoir.The geochemical characteristics of saturated hydrocarbons and carbon isotopes in source rocks, crude oils and extracts in some sandstones from oilbearing strata in the regional interest areas have been investigated in this paper.The contribution of source rocks in the first and third members of Shahejie Formation to petroleum accumulation in the reservoirs of the Ordovician Formation, Dongying Formation in the region has been discussed too.The results show that the crude oils in the reservoir of the Ordovician Formation mainly derived from the source rocks in the third member of Shahejie Formation.

Key words: Nanpu sag, Ordovician, source rock, oil/source correlation, the third member of Shahejie Formation

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