The determining factor of hydrate dissociation rate in the sediments with different water saturations

doi:10.1016/j.energy.2020.117690

GIEC OpenIR

	The determining factor of hydrate dissociation rate in the sediments with different water saturations
	Li, Xiao-Yan 1,2,3,4,5; Li, Xiao-Sen1,2,3,4 ; Wang, Yi 1,2,3,4; Liu, Jian-Wu 1,2,3,4; Hu, Heng-Qi 1,2,3,4,6
	2020-07-01
发表期刊	ENERGY
ISSN	0360-5442
卷号	202 页码:12
通讯作者	Li, Xiao-Sen(lixs@ms.giec.ac.cn) ; Wang, Yi(wangyi@ms.giec.ac.cn)
摘要	In nature, gas hydrate is mainly distributed in permafrost region and deep ocean sediments. For these two types of hydrate reservoirs, water contents in the sediments were different. The water content has a large influence on the characteristics of heat transfer and fluid flow in the sediments, thereby affecting the hydrate dissociation behavior. In this paper, the experiments of hydrate dissociation by depressurization in sediments with different water saturations were conducted. The influences of water saturation on the pressure, the temperature, the gas production, the water production, and the hydrate dissociation rate were analyzed. The experimental results showed that, in the depressurization stage (DS), the rate of pressure dropping and the amount of hydrate reformation increased with the raise of the water saturation in the sediments. In the constant pressure stage (CPS), although the heat conduction rate of the sediments increased with the increase of the water saturation, the mass transport rate of the gas released from hydrate dissociation was limited due to the increase of water saturation. As a result, the hydrate dissociation rate decreased with the increase of the water saturation in the sediments. According to these experimental results, during the hydrate dissociation in the sediments with different water saturations, the hydrate dissociation rate is determined by the mass transport rate of the gas released from the hydrate dissociation. For the hydrate reservoirs with the high-water saturation, the hydrate dissociation rate is largely limited by the diffusion rate of gas released from hydrate dissociation. Hence, the key factor to improve the hydrate dissociation rate in the sediments with high water saturation is to increase the diffusion rate of gas in the sediments. (C) 2020 Elsevier Ltd. All rights reserved.
关键词	Hydrate dissociation Depressurization Determining factor Mass transport Gas diffusion
DOI	10.1016/j.energy.2020.117690
关键词[WOS]	EFFECTIVE THERMAL-CONDUCTIVITY ; GAS-PRODUCTION BEHAVIOR ; METHANE HYDRATE ; DEPRESSURIZATION ; CH4
收录类别	SCI
语种	英语
资助项目	Key Program of National Natural Science Foundation of China[51736009] ; National Natural Science Foundation of China[51676190] ; National Natural Science Foundation of China[51806251] ; Special Project for Marine Economy Development of Guangdong Province[GDME2018D002] ; Science and Technology Apparatus Development Program of the Chinese Academy of Sciences[YZ201619] ; Frontier Sciences Key Research Programof the Chinese Academy of Sciences[QYZDJ-SSW-JSC033] ; Youth Science and Technology Innovation Talent of Guangdong[2016TQ03Z862] ; Youth Innovation Promotion Association CAS[2018382] ; Natural Science Foundation of Guangdong[2017A030313313]
WOS研究方向	Thermodynamics ; Energy & Fuels
项目资助者	Key Program of National Natural Science Foundation of China ; National Natural Science Foundation of China ; Special Project for Marine Economy Development of Guangdong Province ; Science and Technology Apparatus Development Program of the Chinese Academy of Sciences ; Frontier Sciences Key Research Programof the Chinese Academy of Sciences ; Youth Science and Technology Innovation Talent of Guangdong ; Youth Innovation Promotion Association CAS ; Natural Science Foundation of Guangdong
WOS类目	Thermodynamics ; Energy & Fuels
WOS记录号	WOS:000538592700031
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/27300
专题	中国科学院广州能源研究所
通讯作者	Li, Xiao-Sen; Wang, Yi
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Peoples R China 3.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 4.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Univ Sci & Technol China, Hefei 230000, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Li, Xiao-Yan,Li, Xiao-Sen,Wang, Yi,et al. The determining factor of hydrate dissociation rate in the sediments with different water saturations[J]. ENERGY,2020,202:12.
APA	Li, Xiao-Yan,Li, Xiao-Sen,Wang, Yi,Liu, Jian-Wu,&Hu, Heng-Qi.(2020).The determining factor of hydrate dissociation rate in the sediments with different water saturations.ENERGY,202,12.
MLA	Li, Xiao-Yan,et al."The determining factor of hydrate dissociation rate in the sediments with different water saturations".ENERGY 202(2020):12.