Biodegradation of light hydrocarbon(C-5-C-8) in shale gases from the Triassic Yanchang Formation, Ordos basin, China

doi:10.1016/j.jngse.2018.01.002

	Biodegradation of light hydrocarbon(C-5-C-8) in shale gases from the Triassic Yanchang Formation, Ordos basin, China
	Meng, Qiang 1; Wang, Xiaofeng 1; Wang, Xiangzeng 3; Lei, Yuhong 1; Liu, Peng 1,2; Zhang, Lixia 3; Jiang, Chengfu 3; Gao, Chao 3
刊名	JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
	2018-03-01
卷号	51 页码:183-194
关键词	Shale gas Light hydrocarbon Biodegradation Selective removal
ISSN号	1875-5100
DOI	10.1016/j.jngse.2018.01.002
文献子类	Article
英文摘要	Evidence based on the molecular, carbon and hydrogen isotopic composition of shale gas has shown that the biodegradation level of the Yanchang Formation shale gas decreases markedly with increasing depth in some parts of the Ordos basin. The compositions of a suite of 30 shale desorbed gases from the Upper Triassic Yanchang Formation, Ordos basin, China, were analyzed in order to assess the effect of variable levels of biodegradation on the distribution of light hydrocarbons in the shale gas and to investigate the effect of biodegradation on common light hydrocarbon parameters. By comparison and analysis of the gas chromatograms of shale desorbed gas from different depths, a series of light hydrocarbon parameters reflecting biodegradation were established. The results indicate that the order of preferential biodegradation of light hydrocarbon fractions (C-5-C-8) is C-5> C-6 > C-7 approximate to C-8 and that the C-6 fraction composition is n-Hexane (nC(6))> 2-methypentane (2-MP) approximate to 3-methypentane (3-MP) > Methylcyclopentane (MCP)> 2,3-Dimethybutane (2,3-DMB) > 2,2-Dimethybutane (2,2-DMB) > Cyclohexane (CH). There are three main controls on the susceptibility to biodegradation of light hydrocarbons: carbon skeleton, degree of alkylation, and position of alkylation. If the carbon skeleton is the same, a higher degree of alkylation represents a stronger ability to resist biodegradation. If the degree of alkylation is the same, those alkanes with larger carbon skeletons are more resistant to biodegradation. Finally, light hydrocarbon fractions with two methyl groups in the same position are more resistant to biodegradation than hydrocarbons with two methyl groups in different positions. Most of the light hydrocarbon parameters were influenced by biodegradation, except the Mango parameters K1 and K2.
WOS关键词	CARBON ISOTOPIC COMPOSITION ; NATURAL-GAS ; CRUDE OILS ; ORIGIN ; PETROLEUM ; FRACTIONATION ; GEOCHEMISTRY ; SUBSURFACE ; OXIDATION ; GENERATION
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000426150900018
资助机构	National Nature Science Foundation of China(41372156) ; National Nature Science Foundation of China(41372156) ; "Western Light Project" of the Chinese Academy of Sciences(2012KTZB03-03-01-01) ; "Western Light Project" of the Chinese Academy of Sciences(2012KTZB03-03-01-01) ; National Nature Science Foundation of China(41372156) ; National Nature Science Foundation of China(41372156) ; "Western Light Project" of the Chinese Academy of Sciences(2012KTZB03-03-01-01) ; "Western Light Project" of the Chinese Academy of Sciences(2012KTZB03-03-01-01) ; National Nature Science Foundation of China(41372156) ; National Nature Science Foundation of China(41372156) ; "Western Light Project" of the Chinese Academy of Sciences(2012KTZB03-03-01-01) ; "Western Light Project" of the Chinese Academy of Sciences(2012KTZB03-03-01-01) ; National Nature Science Foundation of China(41372156) ; National Nature Science Foundation of China(41372156) ; "Western Light Project" of the Chinese Academy of Sciences(2012KTZB03-03-01-01) ; "Western Light Project" of the Chinese Academy of Sciences(2012KTZB03-03-01-01)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82762]
专题	中国科学院地质与地球物理研究所
通讯作者	Wang, Xiaofeng
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Gansu Prov Key Lab Petr Resources Res, Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Shaanxi Yanchang Petr Grp CO LTD, Xian 710075, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Meng, Qiang,Wang, Xiaofeng,Wang, Xiangzeng,et al. Biodegradation of light hydrocarbon(C-5-C-8) in shale gases from the Triassic Yanchang Formation, Ordos basin, China[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2018,51:183-194.
APA	Meng, Qiang.,Wang, Xiaofeng.,Wang, Xiangzeng.,Lei, Yuhong.,Liu, Peng.,...&Gao, Chao.(2018).Biodegradation of light hydrocarbon(C-5-C-8) in shale gases from the Triassic Yanchang Formation, Ordos basin, China.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,51,183-194.
MLA	Meng, Qiang,et al."Biodegradation of light hydrocarbon(C-5-C-8) in shale gases from the Triassic Yanchang Formation, Ordos basin, China".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 51(2018):183-194.