Chemical Composition of Borehole Gas in Kunlun Pass Basin
详细信息
- 责任者：Yang Yuzhong (State Key Laboratory of Frozen Soil Engineering ; Cold and Arid Regions Environmental and Engineering Research Institute ; Chinese Academy of Sciences ; Lanzhou 730000 ; China) ; Wu Qingbai
- 刊名：Natural Gas Geoscience
- 出版年：2011
- 卷期：22(6)
- 关键词：天然气水合物 ; gas hydrates ; 多年冻土 ; permafrost ; 昆仑山 ; Kunlun Mountains
- 页码：p.1076-1081
- 图表：8 illus., 1 table, 25 refs.
- 分类号：1003
- issnNo：ISSN1672-1926
- isbnNo：CN62-1177/TE
摘要
Chemical and carbon isotopic of two borehole gases collected from the Kunlun Pass basin in permafrost regions in Qinghai-Tibetan 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 bio-genesis gases.