气候变化领域集成服务门户(CCPortal): Growth behavior and resource potential evaluation of gas hydrate in core fractures in Qilian Mountain permafrost area, Qinghai-Tibet Plateau

CCPortal

DOI	10.31035/cg2023021
	Growth behavior and resource potential evaluation of gas hydrate in core fractures in Qilian Mountain permafrost area, Qinghai-Tibet Plateau
	Meng, Qing-guo; Liu, Chang-ling; Lu, Zhen-quan; Hao, Xi-luo; Li, Cheng-feng; Ji, Yun-kai; Wang, Jia-xian
发表日期	2023
ISSN	2096-5192
起始页码	208
结束页码	215
卷号	6 期号:2
英文摘要	The Qilian Mountain permafrost area located in the northern of Qinghai-Tibet Plateau is a favorable place for natural gas hydrate formation and enrichment, due to its well-developed fractures and abundant gas sources. Understanding the formation and distribution of multi-component gas hydrates in fractures is crucial in accurately evaluating the hydrate reservoir resources in this area. The hydrate formation experiments were carried out using the core samples drilled from hydrate-bearing sediments in Qilian Mountain permafrost area and the multi-component gas with similar composition to natural gas hydrates in Qilian Mountain permafrost area. The formation and distribution characteristics of multi-component gas hydrates in core samples were observed in situ by X-ray Computed Tomography (X-CT) under high pressure and low temperature conditions. Results show that hydrates are mainly formed and distributed in the fractures with good connectivity. The ratios of volume of hydrates formed in fractures to the volume of fractures are about 96.8% and 60.67% in two different core samples. This indicates that the fracture surface may act as a favorable reaction site for hydrate formation in core samples. Based on the field geological data and the experimental results, it is preliminarily estimated that the inventory of methane stored in the fractured gas hydrate in Qilian Mountain permafrost area is about 8.67x1013 m3, with a resource abundance of 8.67x108 m3/km2. This study demonstrates the great resource potential of fractured gas hydrate and also provides a new way to further understand the prospect of natural gas hydrate and other oil and gas resources in Qilian Mountain permafrost area.
关键词	Gas hydrate Growth behavior Core fracture Rock Quality Designation Resource potential evaluation Engineering Oil and gas exploration Qilian Mountain permafrost area Qinghai -Tibet Plateau
英文关键词	METHANE HYDRATE; SEDIMENTS
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:001017254200001
来源期刊	CHINA GEOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283012
作者单位	Ministry of Natural Resources of the People's Republic of China; China Geological Survey; Qingdao Institute of Marine Geology (QIMG); Laoshan Laboratory; China Geological Survey; Oil & Gas Survey, China Geological Survey; Ministry of Natural Resources of the People's Republic of China; China University of Geosciences - Wuhan
推荐引用方式 GB/T 7714	Meng, Qing-guo,Liu, Chang-ling,Lu, Zhen-quan,et al. Growth behavior and resource potential evaluation of gas hydrate in core fractures in Qilian Mountain permafrost area, Qinghai-Tibet Plateau[J],2023,6(2).
APA	Meng, Qing-guo.,Liu, Chang-ling.,Lu, Zhen-quan.,Hao, Xi-luo.,Li, Cheng-feng.,...&Wang, Jia-xian.(2023).Growth behavior and resource potential evaluation of gas hydrate in core fractures in Qilian Mountain permafrost area, Qinghai-Tibet Plateau.CHINA GEOLOGY,6(2).
MLA	Meng, Qing-guo,et al."Growth behavior and resource potential evaluation of gas hydrate in core fractures in Qilian Mountain permafrost area, Qinghai-Tibet Plateau".CHINA GEOLOGY 6.2(2023).