新疆石油地质

新疆石油地质 ›› 2007, Vol. 28 ›› Issue (1): 104-107.

• 应用技术 • 上一篇    下一篇

正构烷烃单体碳、氢同位素在油源对比中的应用

刘金萍1, 耿安松1, 熊永强1, 李永新1, 朱桂娟2, 张应心2, 李宇生2   

  1. 1.中国科学院 广州地球化学研究所 有机地球化学国家重点实验室, 广州 510640;
    2.中国石化 大港油田有限责任公司, 天津 300280
  • 收稿日期:2006-05-15 修回日期:2006-08-14 出版日期:2007-02-01 发布日期:2020-07-29
  • 作者简介:刘金萍(1974-), 女, 黑龙江集贤人, 在读博士研究生, 油气地球化学,(Tel)020-85291567(E-mail)gz.ljp@tom.com.
  • 基金资助:
    中国科学院知识创新工程重大项目课题, 环渤海(湾)地区前新生代海相油气资源研究(KZCX1-SW-18-03)资助

Application of Free C and H Isotopes in Normal Alkane to Correlation of Oil Sources in Huanghua Depression

LIU Jin-ping1, GENG An-song1, XIONG Yong-qiang1, LI Yong-xin1, ZHU Gui-juan2, ZHANG Ying-xin2, LI Yu-sheng2   

  1. 1. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, CAS, Guangzhou, Guangdong 510640, China;
    2. Dagang Oilfield Company Ltd., Sinopec, Tianjin 300280, China
  • Received:2006-05-15 Revised:2006-08-14 Online:2007-02-01 Published:2020-07-29

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摘要： 以黄骅坳陷古生界烃源岩作为研究对象,采用GC-IRMS和GC-TC-IRMS技术对烃源岩抽提物中的正构烷烃单体碳、氢同位素进行测定,揭示不同沉积环境中正构烷烃单体碳、氢同位素的组成特征。研究结果表明,下古生界烃源岩正构烷烃的δ13C和δD值分别为-29‰~-33‰和-110‰~-140‰;上古生界烃源岩正构烷烃的δ13C和δD值分别为-27‰~-29‰和-140‰~-170‰.从下古生界的海相到上古生界的海陆过渡相,正构烷烃明显存在一个富δ13C和贫δD的趋势。这表明,沉积环境是控制烃源岩正构烷烃氢同位素组成的主要因素。因此,在复杂的含油气系统中,正构烷烃单体碳、氢同位素组成分布特征对油源对比有着重要的意义,并且可用于母质来源及沉积环境的探讨。

关键词: 黄骅坳陷, 古生界, 正构烷烃, 碳同位素, 氢同位素

Abstract: The free carbon and hydrogen isotopes in n-alkane from the Paleozoic source rocks in Huanghua depression are determined using techniques of GC-IRMS and GC-TC-IRMS to reveal the isotope compositions in different sedimentary environments. The results indicate that the δ13C and δD from n-alkane of Lower Paleozoic (marine facies) source rocks range from -29‰ to -33‰ and from -110‰ to -140%; while the δ13C and δD from n-alkane of Upper Paleozoic (transitional facies) source rocks range from -27‰ to-29‰ and from -140‰ to-170‰, respectively. From the marine facies to the transitional facies, there obviously exist the trend of rich-δ13C and poor-δD for the n-alkane. These also show that sedimentary environment could be the main factor controlling the isotopic compositions. It is concluded that in complex petroliferous systems, free C and H isotopic compositions and distributions from n-alkane are of significance in oil source correlations, and could be applied to investigation of related kerogens and sedimentary environments.

Key words: Huanghua depression, Paleozoic, n-alkane, carbon isotope, hydrogen isotope

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