煤层气的微生物分馏效应

Fractional Effects of Microbe to Coalbed Methane

本文借鉴生物气成因等理论,从分馏的角度探讨微生物作用对煤层气造成的效应,对生物成因的煤层甲烷碳同位素值进行定性描述,并给出了煤层CH4和CO2之间碳同位素值之间的关系。在此基础上以淮南新集矿区煤层气为例,分析得出煤层气的微生物分馏效应对煤层气组分和同位素组成造成的影响,并得出结论,在煤层气的微生物分馏效应中,大部分煤层甲烷来自CO2的还原。

Based on theories such as causes of CBM formation, not only effects of microbe to coalbed methane （CBM） are discussed, but also the isotopic values of methane carbon am described qualitatively in the paper from the point of view of fraction. The authors also provide the relation of isotopic value of methane carbon between CH4 and CO2 among coal seams. Based on such data and taking CBM in Xinji Coal Mining Area in Huainan, Anhui Province of East China as an example, analysis proves that microbial fraction can bring about effects to CBM composition and isotope. Conclusions are that a majority of the methane in coal seams comes from the CO2 reduction.