作　　者： ; ; ; ; ;

机构地区： 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

出　　处： 《天然气地球科学》 2011年第6期1076-1081,共6页

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δ13 CCO2值介于-26.8‰～-20‰之间,小于-10‰,说明其为有机成因气。 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 bio-genesis gases.

关 键 词： 昆仑山垭口 气体组分 多年冻土区

领　　域： [石油与天然气工程]