Low Carbon Energy Institute,China University of Mining and Technology (Key Laboratory Coal-basedCO2 Capture & Geological Storage,Jiangsu Province) School of Resources and Geosciences,ChinaUniversity of Mining and Technology(Key Laboratory of Coalbed Methane Resource & Reservoir Formation History,Ministry of Education)Shanxi CBM Exploration and Development Branch,PetroChina Huabei Oilfield Company

煤层生物成因气与热成因气在气体组成和同位素组成上差异显著,其差异特征对煤层生物气勘探具有重要的指导意义。为了更好服务于煤层生物气的勘探,对煤层生物气组成特征及判识方法进行分析,较为系统地总结了影响生物气组成取得的研究进展,指出了当前研究存在的问题和发展趋势。结果表明:煤层生物气与热成因气在气体组成上差异较小,在稳定同位素组成上差异相对显著,可通过稳定同位素组成特征结合气体相关指数加以识别。生物气组成特征不仅受产气母质、水介质环境等因素控制,而且受介质环境的微生物种群及生物酶活性特征影响。针对生气母质碳多源特征,建议加强煤层生物气产气过程及中间产物研究,同时结合当前微生物强化煤层气产气特征,修正或重建特定条件下煤层生物气判识模型。

There are significant differences on the gas composition and isotopic composition between biogenic coalbed gases and thermogeniocoalbed gases,which has an important significance to coalbed methane resource exploration. In order to beter serve the exploration of biogeniocoalbed gases,the composition of coalbed methane and its classification were analyzed,.infuence factors of biogenic coalbed methane composititn were summarized,the problems and research directions were pointed.The results show that there are few difference in gas composition between biogas and thermal gas,and significant differences in stable isotope compositon.The biogenic coalbed gas can be comprehensive reoongited by the stable isotope composition characteristics and the gas related indexes.The biogas composition characterisics not only controlled by the aerogenic parent materials environmental water,but also infuenced by the anaerobic microbial population and enzyme activity. ue to multisource oarbon parent materials,the process of the biogenic coalbed methane and its intermediate materials should be further studied; combined with the gases characteristics of bioconverting coal to methane,the CD-diagram for biogenic coalbed methane classification should be modfied orland rebuilded.

国家自然科学基金资助项目(41202117,41572138)；中国博士后基金资助项目(2013M540473)；江苏省自然科学基金资助项目(BK20150177)；江苏省博士后基金资助项目(1301035B)；中央高校基本科研业务费专项基金资助项目(2014QNA17)；煤层气资源与成藏过程教育部重点实验室开放基金资助项目(2013-006)；