Distribution and reformation characteristics of gas hydrate during hydrate dissociation by thermal stimulation and depressurization methods

doi:10.1016/j.apenergy.2020.115575

GIEC OpenIR

	Distribution and reformation characteristics of gas hydrate during hydrate dissociation by thermal stimulation and depressurization methods
	Kou, Xuan 1,2,3,4,5; Li, Xiao-Sen1,2,3,4 ; Wang, Yi 1,2,3,4; Zhang, Yu1,2,3,4 ; Chen, Zhao-Yang 1,2,3,4
	2020-11-01
发表期刊	APPLIED ENERGY
ISSN	0306-2619
卷号	277 页码:11
通讯作者	Li, Xiao-Sen(lixs@ms.giec.ac.cn) ; Wang, Yi(wangyi@ms.giec.ac.cn)
摘要	Pore-scale distribution and reformation characteristics of gas hydrate in porous sediments can provide invaluable information on macroscale production behaviors. In this work, the X-ray computed tomography (X-ray -CT) has been conducted to detect distribution characteristics of the hydrate-bearing sample during hydrate formation and dissociation. Experimental results indicate that, during hydrate formation, mass and heat transfer can lead to the transformation of grain-attaching (grain-cementing and grain-contacting) hydrate to pore-filling hydrate, as well as the heterogeneous distribution of gas hydrate in pores. During hydrate dissociation, whether the thermal stimulation stage or the depressurization stage, the hydrate decomposition initiates from the ablation of the hydrate-gas interface, and the grain-cementing hydrate remains intact until the hydrate cracks into particles and collapses. In addition, during the thermal stimulation stage, the migration of "memory water" under the equilibrium hydrate formation condition leads to the hydrate reformation, and the hydrate reformation promotes the homogeneous distribution of gas hydrate in pores. During the depressurization stage, gas hydrate is reformed below the hydrate "dissociation front" because of the endothermic process of hydrate dissociation and the pressure-driven fluid flow. The reformed grain-cementing hydrate provides fluid flow channels instead of plugging the pores and throats. However, the shut-in time after the depressurization-induced gas production should not be too long to prevent the pore plugging by the further growth of the reformed hydrate. Additionally, the depressurization process finally leads to the grain migration and may reduce the sediment strength under the loose grain filling condition.
关键词	X-ray CT Gas hydrate Distribution Hydrate decomposition Hydrate reformation
DOI	10.1016/j.apenergy.2020.115575
关键词[WOS]	METHANE HYDRATE ; BEARING SEDIMENTS ; RECOVERY ; VISUALIZATION ; DECOMPOSITION ; PERMEABILITY ; TOMOGRAPHY ; EVOLUTION ; RESERVOIR ; FLOW
收录类别	SCI
语种	英语
资助项目	Key Program of National Natural Science Foundation of China[51736009] ; Special Project for Marine Economy Development of Guangdong Province[GDME-2018d002] ; Guangdong Special Support Program-Local innovation and entrepreneurship team project[2019BT02L278] ; Science and Technology Apparatus Development Program of the Chinese Academy of Sciences[YZ201619] ; Frontier Sciences Key Research Program of the Chinese Academy of Sciences[QYZDJ-SSW-JSC033]
WOS研究方向	Energy & Fuels ; Engineering
项目资助者	Key Program of National Natural Science Foundation of China ; Special Project for Marine Economy Development of Guangdong Province ; Guangdong Special Support Program-Local innovation and entrepreneurship team project ; Science and Technology Apparatus Development Program of the Chinese Academy of Sciences ; Frontier Sciences Key Research Program of the Chinese Academy of Sciences
WOS类目	Energy & Fuels ; Engineering, Chemical
WOS记录号	WOS:000579393800078
出版者	ELSEVIER SCI LTD
引用统计	被引频次：64[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/344007/32212
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, 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 100083, 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	Kou, Xuan,Li, Xiao-Sen,Wang, Yi,et al. Distribution and reformation characteristics of gas hydrate during hydrate dissociation by thermal stimulation and depressurization methods[J]. APPLIED ENERGY,2020,277:11.
APA	Kou, Xuan,Li, Xiao-Sen,Wang, Yi,Zhang, Yu,&Chen, Zhao-Yang.(2020).Distribution and reformation characteristics of gas hydrate during hydrate dissociation by thermal stimulation and depressurization methods.APPLIED ENERGY,277,11.
MLA	Kou, Xuan,et al."Distribution and reformation characteristics of gas hydrate during hydrate dissociation by thermal stimulation and depressurization methods".APPLIED ENERGY 277(2020):11.