Discovery and Significance of High CH_4 Primary Fluid Inclusions in Reservoir Volcanic Rocks of the Songliao Basin,NE China

查看全文 作　　者：WANG [1]Pujun;HOU [2]Qijun;WANG [1]Keyong;CHEN [3]Shumin;CHENG [1]Rihui;LIU [1]Wanzhu;LI [1]Quanlin

机构地区：[1]Earth Sciences College, Jilin University, Changchun, Jilin 130061;[2]Jilin Petroleum Company, Songyuan, Jilin 138000;[3]Daqing Petroleum Company, Daqing, Heilongjiang 163712

出　　处：《Acta Geologica Sinica(English Edition)》索引2007年第81卷第1期,共8页

摘　　要：Comparing compositions of the fluid inclusions in volcanic rocks to the contents and isotopes of the gases in corresponding volcanic reservoirs using microthermometry, Raman microspectroscopy and mass spectrum analysis, we found that: (1) up to 82 mole% methane exists in the primary inclusions hosted in the reservoir volcanic rocks; (2) high CH4 inclusions recognized in the volcanic rocks correspond to CH4-bearing CO2 reservoirs that are rich in helium and with a high 3He/4He ratio and which show reversed order of δ 13C in alkane; (3) in gas reservoirs of such abiotic methane (>80%) and a mix of CH4 and CO2, the enclosed content of CH4 in the volcanic inclusions is usually below 42 mole%, and the reversed order of δ 13C in alkane is sometimes irregular in the corresponding gas pools; (4) a glassy inclusion with a homogeneous temperature over 900°C also contains a small portion of CH4 although predominantly CO2. This affinity between gas pool and content of inclusion in the same volcanic reservoirs demonstrates that magma-originated gases, both CH4 and CO2, have contributed significantly to the corresponding gas pools and that the assumed hydrocarbon budget of the bulk earth might be much larger than conventionally supposed. 关键词：松辽平原火山岩二氧化碳甲烷天然气

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Discovery and Significance of High CH_4 Primary Fluid Inclusions in Reservoir Volcanic Rocks of the Songliao Basin,NE China

参考文献(39)

引证文献(14)

耦合文献(209)

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