石油学报 ›› 2007, Vol. 28 ›› Issue (3): 68-74,79.DOI: 10.7623/syxb200703013

• 地质勘探 • 上一篇    下一篇

鄂尔多斯盆地奥陶系碳酸盐岩脉流体包裹体碳氧同位素分析

刘德良1, 孙先如2, 李振生1, 唐南安3, 谈迎1   

  1. 1. 中国科学技术大学地球与空间科学学院, 安徽合肥, 230026;
    2. 安徽省地质实验研究所, 安徽合肥, 230001;
    3. 中国地质科学院西安地质矿产研究所, 陕西西安, 710054
  • 收稿日期:2006-02-16 修回日期:2006-04-14 出版日期:2007-05-25 发布日期:2010-05-21
  • 作者简介:刘德良,男,1938年11月生,1961年毕业于南京大学大地构造专业,现为中国科学技术大学教授、博士生导师、二氧化碳天然气地质资源环境研究中心负责人,主要从事盆-山构造、天然气成藏体系结构、构造形成时限等研究.E-mail:liudl@ustc.edu.cn
  • 基金资助:
    国家自然科学基金(No.40472074)和国家重点基础研究发展规划项目(2001CB209133)联合资助.

Carbon and oxygen isotope analysis of fluid inclusions in Ordovician carbonate veins of Ordos Basin

Liu Deliang1, Sun Xianru2, Li Zhensheng1, Tang Nan'an3, Tan Ying1   

  1. 1. School of Earth and Space Sciences, University of Science and Technology of china, Hefei 230026, China;
    2. Institute of Geological Experiment of Anhui Province, Hefei 230001, China;
    3. Xi'an Institute of Geology and Mineral Resources, Chinese Academy of Geological Sciences, Xi'an 710054, China
  • Received:2006-02-16 Revised:2006-04-14 Online:2007-05-25 Published:2010-05-21

摘要: 研究了鄂尔多斯盆地流体包裹体的CO2成因及其与油气演化的关系,应用同位素分馏方程计算了奥陶系碳酸盐岩脉流体包裹体中CO2的碳同位素值和H2O的氧同位素值.结果表明,其碳、氧同位素值分别为-1.64‰~-11.15‰和-22.12‰~-33.06‰.该包裹体的CO2以无机成因为主,其碳同位素组成形成于100℃~160℃的条件下,对应于油气演化的成熟-高成熟阶段.

关键词: 鄂尔多斯盆地, 流体包裹体, 油气演化, 碳氧同位素, CO2成因

Abstract: The origin of carbon dioxide in fluid inclusions and the evolution of oil and gas in Ordos Basin were studied.The values of carbon isotope of carbon dioxide and oxygen isotope of water in fluid inclusions of the Ordovician carbonate veins were calculated by the isotopic fractionation equation.The values of carbon isotope of carbon dioxide and oxygen isotope of water in fluid inclusions are minus 1.64‰ to minus 11.15‰ and minus 22.12‰ to minus 33.06‰,respectively.The leading origin of carbon dioxide in fluid inclusions is inorganic.The carbon isotope composition of carbon dioxide was generated under homogenization temperature from 100℃ to 160℃corresponding to the mature-to-high mature oil-gas evolution stage.

Key words: Ordos Basin, fluid inclusion, oil gas evolution, carbon and oxygen isotope, origin of carbon dioxide

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