天然气地球科学 ›› 2011, Vol. 22 ›› Issue (6): 1076–1081.doi: 10.11764/j.issn.1672-1926.2011.06.1076

• 天然气地球化学 • 上一篇    下一篇

昆仑山垭口多年冻土区钻孔气体组分分析

杨玉忠,吴青柏,邓友生,蒋观利,张鹏   

  1. 中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃 兰州 730000
  • 收稿日期:2011-02-23 修回日期:2011-04-13 出版日期:2011-12-10 发布日期:2011-12-10
  • 通讯作者: 杨玉忠nwtiger145@163.com. E-mail:nwtiger145@163.com.
  • 作者简介:杨玉忠(1986-),男,甘肃金昌人,硕士研究生,主要从事多年冻土区天然气水合物研究.E-mail:nwtiger145@163.com.
  • 基金资助:

    中国科学院重要方向项目(编号:KZCX2-YW-330);西部行动计划项目(编号:KZCX2-XB3-03)联合资助.

Chemical Composition of Borehole Gas in Kunlun Pass Basin in Permafrost Regions in Qinghai-Tibet Plateau

Yang Yu-zhong, Wu Qing-bai, Deng You-sheng, Jiang Guan-lin, Zhang Peng   

  1. State Key Laboratory of Frozen Soil Engineering,Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2011-02-23 Revised:2011-04-13 Online:2011-12-10 Published:2011-12-10

摘要:

昆仑山垭口多年冻土区2个钻孔的气体组分和同位素数据显示,钻孔气体中烃类气体以CH4为主,含微量的C2H6、C3H8和C4H10. 钻孔-1泥浆气体的C1/(C2+C3)值介于163~1 642之间;钻孔-2岩心和泥浆气体主要为CH4气体组分,未检出C2H6等气体组分,同时δ13CCH4<-60‰,属于微生物成因气。2个钻孔的CO2含量低于15%,而且δ13CCO2值介于-26.8‰~-20‰之间,小于-10‰,说明其为有机成因气。

关键词: 昆仑山垭口, 气体组分, 多年冻土区

Abstract:

Chemical and carbon isotopic of two borehole Gases collected from the Kunlun Pass basin in permafrost regions in Qinghai Tibet Plateau are measured. The results show that hydrocarbon gas in core and slurry gases of borehole is mainly composed of methane,a little amount of ethane,propane and butane. Dryness coefficient of C1/(C2+C3) ranges from 163 to 1 642 for slurry gas of borehole 1. Methane can be measured in the slurry and core gas of borehole 2,no detection of heavy hydrocarbon gases (i.e. C2H6). δ13C1 values is lower than -60‰,indicating that gases belong to microbial gases. The contents of carbon dioxide are less than 15%,and δ13CCO2 values range from -26.8‰ to -20‰,suggesting that they are biogenesis gases.

Key words: Kunlun Pass basin, Gas composition, Permafrost regions.

中图分类号: 

  • TE122.1+13

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