Discrimination of abiogenic and biogenic alkane gases

查看全文 作　　者：DAI [1,2]JinXing;ZOU [1]CaiNeng;ZHANG [1]ShuiChang;LI [3]Jian;NI [3]YunYan;HU [3]GuoYi;LUO [3]Xia;TAO [1]ShiZhen;ZHU [1]GuangYou;MI [1]JingKui;LI [3]ZhiSheng;HU [2]AnPing;YANG [2]Chun;ZHOU [1]QingHua;SHUAI [1]YanHua;ZHANG [3]Ying;MA [3]ChengHua

机构地区：[1]Research Institute of Petroleum Exploration and Development,Petro China,Beijing 100083,China;[2]Department of Earth Sciences,Zhejiang University,Hangzhou 310027,China;[3]Research Institute of Petroleum Exploration and Development(Langfang Branch),PetroChina,Langfang 065007,China

出　　处：《Science China Earth Sciences》索引2008年第51卷第12期,共13页

基　　金：the Science and Technology Project of PetroChina (Grant No.07-01C-01-07) 摘　　要：We have combined the analytical data of the carbon isotope distribution pattern, R/Ra and CH4/3He values of abiogenic and biogenic (referring to the thermogenic and bacterial or microbial) alkane gases in China with those of alkane gases from USA, Russia, Germany, Australia and other countries. Four discrimination criteria are derived from this comparative study: 1) Carbon isotopic composition is generally greater than -30‰ for abiogenic methane and less than -30‰ for biogenic methane; 2) Abiogenic alkane gases have a carbon isotopic reversal trend (δ 13C1> δ 13C2> δ 13C3> δ 13C4) with δ 13C1>-30‰ in general; 3) Gases with R/Ra >0.5 and δ 13C11 δ 13C2>0 are of abiogenic origin; 4) Gases (meth- ane) with CH4/3He≤106 are of abiogenic origin, whereas gases with CH4/3He≥1011 are of biogenic origin. 关键词：BIOGENIC abiogenic ALKANE gas DISCRIMINATION carbon ISOTOPE HELIUM ISOTOPE

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Discrimination of abiogenic and biogenic alkane gases

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耦合文献(110)

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