Effect of permafrost properties on gas hydrate petroleum system in the Qilian Mountains, Qinghai, Northwest China

doi:10.1039/c4em00482e

	Effect of permafrost properties on gas hydrate petroleum system in the Qilian Mountains, Qinghai, Northwest China
	Wang, Pingkang 5; Zhang, Xuhui 1; Zhu, Youhai ; Li, Bing 2; Huang, Xia ; Pang, Shouji ; Zhang, Shuai ; Lu, Cheng ; Xiao, Rui 3
刊名	ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
	2014
卷号	16 期号:12 页码:2711-2720
ISSN号	2050-7887
DOI	10.1039/c4em00482e
英文摘要	The gas hydrate petroleum system in the permafrost of the Qilian Mountains, which exists as an epigenetic hydrocarbon reservoir above a deep-seated hydrocarbon reservoir, has been dynamic since the end of the Late Pleistocene because of climate change. The permafrost limits the occurrence of gas hydrate reservoirs by changing the pressure-temperature (P-T) conditions, and it affects the migration of the underlying hydrocarbon gas because of its strong sealing ability. In this study, we reconstructed the permafrost structure of the Qilian Mountains using a combination of methods and measured methane permeability in ice-bearing sediment permafrost. A relationship between the ice saturation of permafrost and methane permeability was established, which permitted the quantitative evaluation of the sealing ability of permafrost with regard to methane migration. The test results showed that when ice saturation is >80%, methane gas can be completely sealed within the permafrost. Based on the permafrost properties and genesis of shallow gas, we suggest that a shallow "gas pool" occurred in the gas hydrate petroleum system in the Qilian Mountains. Its formation was related to a metastable gas hydrate reservoir controlled by the P-T conditions, sealing ability of the permafrost, fault system, and climatic warming. From an energy perspective, the increasing volume of the gas pool means that it will likely become a shallow gas resource available for exploitation; however, for the environment, the gas pool is an underground "time bomb" that is a potential source of greenhouse gas.
学科主题	油气地质
WOS关键词	TIBET PLATEAU ; NATURAL-GAS ; CLIMATE-CHANGE ; METHANE ; ISOTOPE ; CANADA ; CARBON
WOS研究方向	Chemistry ; Environmental Sciences & Ecology
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000345454100005
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40246]
专题	中国地质科学院
作者单位	1.China Geol Survey, Oil & Gas Survey, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 3.Jilin Univ, Coll Construct & Engn, Changchun 130021, Peoples R China 4.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China 5.中国地质调查局油气资源调查中心
推荐引用方式 GB/T 7714	Wang, Pingkang,Zhang, Xuhui,Zhu, Youhai,et al. Effect of permafrost properties on gas hydrate petroleum system in the Qilian Mountains, Qinghai, Northwest China[J]. ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS,2014,16(12):2711-2720.
APA	Wang, Pingkang.,Zhang, Xuhui.,Zhu, Youhai.,Li, Bing.,Huang, Xia.,...&Xiao, Rui.(2014).Effect of permafrost properties on gas hydrate petroleum system in the Qilian Mountains, Qinghai, Northwest China.ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS,16(12),2711-2720.
MLA	Wang, Pingkang,et al."Effect of permafrost properties on gas hydrate petroleum system in the Qilian Mountains, Qinghai, Northwest China".ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS 16.12(2014):2711-2720.