Noble gas isotopic variations and geological implication of Longmaxi shale gas in Sichuan Basin, China

doi:10.1016/j.marpetgeo.2017.01.022

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 兰州油气中心

	Noble gas isotopic variations and geological implication of Longmaxi shale gas in Sichuan Basin, China
	Cao, Chunhui 1,2; Zhang, Mingjie 1; Tang, Qingyan 1; Yang, Yang 1; Lv, Zonggang 3; Zhang, Tongwei 1; Chen, Chang 3; Yang, Hui 2; Li, Liwu 2
刊名	MARINE AND PETROLEUM GEOLOGY
	2018
卷号	89 页码:38-46
关键词	Shale Gas Supply Origin Noble Gas Isotope Shale Gas Longmaxi Formation Sichuan BasIn In chIna
ISSN号	0264-8172
DOI	10.1016/j.marpetgeo.2017.01.022
文献子类	Article
英文摘要	The large difference in carbon isotopic compositions of shale gases from the Lower Silurian Longmaxi Formation marine organic-rich shales between Changning and Weiyuan areas in Sichuan Basin, China is a still debate issue. In this study, 30 produced shale gas samples were collected during 3 years production period and analyzed for noble gas (He, Ne and Ar) abundances and isotopic compositions to reveal the origin and variation causes of shale gases. The results show that the Longmaxi shale gases show low (3)Hel(4)He and Ne-20/Ne-22, and varied but high Ne-21/Ne-22 and Ar-40/Ar-36 ratios. The Weiyuan shale gases are characterized by low He-3/He-4, high Ar-40/Ar-36 ratios and varied He-4 and Ar-40 abundances, and a large increase in Ar-40 contents and a slight decrease in Ar-40/Ar-36 ratios display during 3 years shale gas production period from Jan. 2014 to Jun. 2016. Whereas the Changning shale gases are characterized by low and varied He-3/He-4 ratios and high He-4 and Ar-40 abundances, and small fluctuations in Ar-40 contents and Ar-40/Ar-36 ratios exhibit during 3 years production period. In addition, the shale gases produced from horizontal wells in the Weiyuan area possessed higher Ar-40 and Ar-40/Ar-36 ratio than that those from vertical wells at same well site. The noble gas isotopic compositions and variation of Longmaxi shale gases suggested that they are originated mainly from crust, air saturated fluid (ASF) and radiogenic accumulation. The variation of Ar-40 and He-4 contents during shale gas production mainly reflects the degree of shale gas source supply from mineral matrix to fracture network, and the greater increases in Ar-40 and He-4 contents with production time show less abundant shale gas supply. Therefore, the increase trend of Ar-40 contents with shale gas production time in the Weiyuan area during 3 years production period possibly suggests less adequate shale gas supply. In contrast, the uniform or nearly constant of Ar-40 content through production time in the Changing area indicates abundant supply of shale gas sources from mineral matrix, resulting in less production decline. Variation in He-4 and Ar-40 contents through shale gas production time could be sensitive indicators of abundant or depleted shale gas source supply. (C) 2017 Elsevier Ltd. All rights reserved.
WOS关键词	ORGANIC-MATTER ACCUMULATION ; SILURIAN MARINE SHALE ; CARBON-DIOXIDE ; SOUTH CHINA ; GASEOUS HYDROCARBONS ; SOUTHWESTERN CHINA ; NUCLEOGENIC NEON ; PALEOZOIC SHALES ; UPPER ORDOVICIAN ; EARTHS MANTLE
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000418976800005
资助机构	National Basic Research Program(2012CB214701) ; National Basic Research Program(2012CB214701) ; Public Interest Special Fund of China MLR(201511020) ; Public Interest Special Fund of China MLR(201511020) ; NSF of China(41502143 ; NSF of China(41502143 ; Key project of China MOE(311010) ; Key project of China MOE(311010) ; Project of Gansu Key Lab(1309RTSA041) ; Project of Gansu Key Lab(1309RTSA041) ; 41572136 ; 41572136 ; 41472070 ; 41472070 ; 41372095) ; 41372095) ; National Basic Research Program(2012CB214701) ; National Basic Research Program(2012CB214701) ; Public Interest Special Fund of China MLR(201511020) ; Public Interest Special Fund of China MLR(201511020) ; NSF of China(41502143 ; NSF of China(41502143 ; Key project of China MOE(311010) ; Key project of China MOE(311010) ; Project of Gansu Key Lab(1309RTSA041) ; Project of Gansu Key Lab(1309RTSA041) ; 41572136 ; 41572136 ; 41472070 ; 41472070 ; 41372095) ; 41372095) ; National Basic Research Program(2012CB214701) ; National Basic Research Program(2012CB214701) ; Public Interest Special Fund of China MLR(201511020) ; Public Interest Special Fund of China MLR(201511020) ; NSF of China(41502143 ; NSF of China(41502143 ; Key project of China MOE(311010) ; Key project of China MOE(311010) ; Project of Gansu Key Lab(1309RTSA041) ; Project of Gansu Key Lab(1309RTSA041) ; 41572136 ; 41572136 ; 41472070 ; 41472070 ; 41372095) ; 41372095) ; National Basic Research Program(2012CB214701) ; National Basic Research Program(2012CB214701) ; Public Interest Special Fund of China MLR(201511020) ; Public Interest Special Fund of China MLR(201511020) ; NSF of China(41502143 ; NSF of China(41502143 ; Key project of China MOE(311010) ; Key project of China MOE(311010) ; Project of Gansu Key Lab(1309RTSA041) ; Project of Gansu Key Lab(1309RTSA041) ; 41572136 ; 41572136 ; 41472070 ; 41472070 ; 41372095) ; 41372095)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/93162]
专题	地质与地球物理研究所_兰州油气中心
通讯作者	Zhang, Mingjie
作者单位	1.Lanzhou Univ, Sch Earth Sci, Key Lab Mineral Resources Western China Gansu, Lanzhou 730000, Gansu, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Key Lab Petr Resources Gansu Prov, Lanzhou 730000, Gansu, Peoples R China 3.PetroChina Southwest Oil & Gas Field Co, Shunan Gas Mine Field, Luzhou 646000, Peoples R China
推荐引用方式 GB/T 7714	Cao, Chunhui,Zhang, Mingjie,Tang, Qingyan,et al. Noble gas isotopic variations and geological implication of Longmaxi shale gas in Sichuan Basin, China[J]. MARINE AND PETROLEUM GEOLOGY,2018,89:38-46.
APA	Cao, Chunhui.,Zhang, Mingjie.,Tang, Qingyan.,Yang, Yang.,Lv, Zonggang.,...&Li, Liwu.(2018).Noble gas isotopic variations and geological implication of Longmaxi shale gas in Sichuan Basin, China.MARINE AND PETROLEUM GEOLOGY,89,38-46.
MLA	Cao, Chunhui,et al."Noble gas isotopic variations and geological implication of Longmaxi shale gas in Sichuan Basin, China".MARINE AND PETROLEUM GEOLOGY 89(2018):38-46.