Gas geochemistry characteristic of shale gas in Longmaxi Formation, SE Sichuan Basin, China

doi:10.1088/1742-6596/52/1/012009

	Gas geochemistry characteristic of shale gas in Longmaxi Formation, SE Sichuan Basin, China
	Cao,Chunhui 1,2; Du,Li 1; Li,Liwu 1; He,Jian 1; Li,Zhongping 1
刊名	IOP Conference Series: Earth and Environmental Science
	2017
卷号	52 期号:1
ISSN号	1755-1307
DOI	10.1088/1742-6596/52/1/012009
英文摘要	Abstract Shale gas samples collected from Lower Silurian Longmaxi Formation of Southern Sichuan Basin in Weiyuan were analysed for stable isotope composition of noble gases and molecular composition, stable carbon isotope composition of hydrocarbons. Results show these shale gases are of organic origin gas, and produced at high-over maturity stage. All the analysed hydrocarbon gases reveal complete inversed isotopic trends from methane to propane, and δ13C1, δ13C2 have obviously different between Weiyuan and Changning areas. CO2 was mainly generated during thermogenic processes of transformation of organic matter, although some gases can contain components from endogenic processes and from thermal destruction of carbonates. He and Ar are mainly product of α-decay of U and Th enriched in crustal materials. A small contribution of mantle origin He was found in the gas reservoirs. Continuous monitoring data indicate 3He/4He ratio didn’t change with the mining time.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:1755-1307-52-1-012009
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/64194]
专题	中国科学院地质与地球物理研究所
作者单位	1.Key Laboratory of Petroleum Resources, Gansu Province/Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, PR China 2.Key Lab of Mineral Resources in Western China (Gansu), School of Earth Sciences, Lanzhou University, Lanzhou 730000, China
推荐引用方式 GB/T 7714	Cao,Chunhui,Du,Li,Li,Liwu,et al. Gas geochemistry characteristic of shale gas in Longmaxi Formation, SE Sichuan Basin, China[J]. IOP Conference Series: Earth and Environmental Science,2017,52(1).
APA	Cao,Chunhui,Du,Li,Li,Liwu,He,Jian,&Li,Zhongping.(2017).Gas geochemistry characteristic of shale gas in Longmaxi Formation, SE Sichuan Basin, China.IOP Conference Series: Earth and Environmental Science,52(1).
MLA	Cao,Chunhui,et al."Gas geochemistry characteristic of shale gas in Longmaxi Formation, SE Sichuan Basin, China".IOP Conference Series: Earth and Environmental Science 52.1(2017).