Gas Sources of Natural Gas Hydrates in the Shenhu Drilling Area, South;China Sea: Geochemical Evidence and Geological Analysis

doi:10.1111/1755-6724.12088

CORC > 中国地质调查局 > 中国地质调查局 > 中国地质调查局广州海洋地质调查局

	Gas Sources of Natural Gas Hydrates in the Shenhu Drilling Area, South;China Sea: Geochemical Evidence and Geological Analysis
	Zhu Youhai 1; Huang Xia 1; Fu Shaoying 2; Su Pibo 2
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2013
卷号	87 期号:3 页码:767-776
关键词	natural gas hydrate methane microbial gas gas source migration South China Sea
ISSN号	1000-9515
DOI	10.1111/1755-6724.12088
英文摘要	The Shenhu gas hydrate drilling area is located in the central Baiyun sag, Zhu II depression, Pearl River Mouth basin, northern South China Sea. The gas compositions contained in the hydrate-bearing zones is dominated by methane with content up to 99.89% and 99.91%. The carbon isotope of the methane (C-delta 13(1)) are -56.7 parts per thousand and -60.9 parts per thousand, and its hydrogen isotope (delta D) are -199 parts per thousand and -180 parts per thousand, respectively, indicating the methane from the microbial reduction of CO2. Based on the data of measured seafloor temperature and geothermal gradient, the gas formed hydrate reservoirs are from depths 24-1699 m below the seafloor, and main gas-generation zone is present at the depth interval of 416-1165 m. Gas-bearing zones include the Hanjiang Formation, Yuehai Formation, Wanshan Formation and Quaternary sediments. We infer that the microbial gas migrated laterally or vertically along faults (especially interlayer faults), slump structures, small-scale diapiric structures, regional sand beds and sedimentary boundaries to the hydrate stability zone, and formed natural gas hydrates in the upper Yuehai Formation and lower Wanshan Formation, probably with contribution of a little thermogenic gas from the deep sedments during this process.
学科主题	油气地质
WOS关键词	METHANE
WOS研究方向	Geology
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000321845300014
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39903]
专题	中国地质调查局广州海洋地质调查局
作者单位	1.China Geol Survey, Oil & Gas Survey, Beijing 100029, Peoples R China. 2.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China. 3.Guangzhou Marine Geol Survey, Guangzhou 510760, Guangdong, Peoples R China.
推荐引用方式 GB/T 7714	Zhu Youhai,Huang Xia,Fu Shaoying,et al. Gas Sources of Natural Gas Hydrates in the Shenhu Drilling Area, South;China Sea: Geochemical Evidence and Geological Analysis[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2013,87(3):767-776.
APA	Zhu Youhai,Huang Xia,Fu Shaoying,&Su Pibo.(2013).Gas Sources of Natural Gas Hydrates in the Shenhu Drilling Area, South;China Sea: Geochemical Evidence and Geological Analysis.ACTA GEOLOGICA SINICA-ENGLISH EDITION,87(3),767-776.
MLA	Zhu Youhai,et al."Gas Sources of Natural Gas Hydrates in the Shenhu Drilling Area, South;China Sea: Geochemical Evidence and Geological Analysis".ACTA GEOLOGICA SINICA-ENGLISH EDITION 87.3(2013):767-776.