Observation of gas hydrate distribution in sediment pore space

doi:10.6038/cjg20140530

CORC > 中国地质调查局 > 中国地质调查局 > 中国地质调查局青岛海洋地质研究所

	Observation of gas hydrate distribution in sediment pore space
	Hu Gao-Wei 8; Li Cheng-Feng ; Ye Yu-Guang ; Liu Chang-Ling ; Zhang Jian ; Diao Shao-Bo
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2014
卷号	57 期号:5 页码:1675-1682
关键词	Gas Hydrate High-resolution X-CT Pore scale Micro-distribution Saturations
ISSN号	0001-5733
DOI	10.6038/cjg20140530
英文摘要	Based on the high-resolution industrial x-ray computerized tomography (X-CT), a dedicated apparatus was developed to observe in-situ pore scale distribution of gas hydrate directly during hydrate formation and subsequently dissociation in artificial cores. Methane gas hydrate was formed in 0. 425 similar to 0. 85 mm sands and CT scanning was conducted during the process to observe the hydrate distribution in sediment pore space. The result shows that at each hydrate saturation level, the distribution models of gas hydrate are complicated. The occurrence of "floating model" (i.e. hydrate floats in pore fluid), "contact model" (i.e. hydrate contact with the sediment particle), and the "cementing model" (i.e. hydrates cement the sediment particles) can be found at the same time. It also shows that at different hydrate formation stages, the dominant models are not the same: although there are some hydrates floating in the pore fluid at the first stage of hydrate formation, most hydrates connect the sediment particles. Consequently, the hydrate distribution at this moment can be described as a cementing model. At the second stage of hydrate formation (e. g., hydrate saturation at 24. 6% and 35. 0%), hydrates are mainly growing as a floating or contact model. As hydrate saturation is much higher (e. g. after hydrate saturation is more than 51. 4%), the floating hydrates coalesce with each other and the hydrates cement the sediment particles again.
学科主题	油气地质
WOS关键词	RAY COMPUTED-TOMOGRAPHY ; SATURATION
WOS研究方向	Geochemistry & Geophysics
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000336701200030
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40316]
专题	中国地质调查局青岛海洋地质研究所
作者单位	1.[Hu Gao-Wei 2.Li Cheng-Feng 3.Ye Yu-Guang 4.Liu Chang-Ling 5.Zhang Jian 6.Minist Land & Resources, Key Lab Gas Hydrates, Qingdao 266071, Peoples R China 7.Qingdao Inst Marine Geol, Qingdao 266071, Peoples R China 8.中国地质调查局青岛海洋地质研究所
推荐引用方式 GB/T 7714	Hu Gao-Wei,Li Cheng-Feng,Ye Yu-Guang,et al. Observation of gas hydrate distribution in sediment pore space[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2014,57(5):1675-1682.
APA	Hu Gao-Wei,Li Cheng-Feng,Ye Yu-Guang,Liu Chang-Ling,Zhang Jian,&Diao Shao-Bo.(2014).Observation of gas hydrate distribution in sediment pore space.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,57(5),1675-1682.
MLA	Hu Gao-Wei,et al."Observation of gas hydrate distribution in sediment pore space".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 57.5(2014):1675-1682.