Effective thermal conductivity changes of the hydrate-bearing quartz sands in depressurization and soaking

doi:10.1016/j.jngse.2021.103878

GIEC OpenIR

	Effective thermal conductivity changes of the hydrate-bearing quartz sands in depressurization and soaking
	He, Juan 1,2,3,4; Li, Xiaosen1,2,3,5 ; Chen, Zhaoyang 1,2,3,5; Li, Qingping 5; Xia, Zhiming 1,2,3; Zhang, Yu1,2,3 ; Wang, Yi 1,2,3; You, Changyu 1,2,4
	2021-05-01
发表期刊	JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
ISSN	1875-5100
卷号	89 页码:13
通讯作者	Chen, Zhaoyang(chenzy@ms.giec.ac.cn)
摘要	The effective thermal conductivity changes in the sediments during depressurization are significant for hydrate exploitation. But these changes cannot be measured directly because of the unavailable stable conditions during depressurization. In this work, in order to form the stable conditions for the measurements, soaking was designed to stabilize temperature and pressure in the sample after depressurization. Afterward, the effective thermal conductivity changes were measured by the transient hot-wire method. To define reasons for these changes, gaswater-hydrate distribution was inferred by the electrical resistance changes. The effective thermal conductivity changes were further analyzed from initial hydrate saturation, back pressure, water-gas production ratio, and gas-water-hydrate distribution, respectively. The results showed that the effective thermal conductivity changes were involved with hydrate dissociation closely. The effective thermal conductivity was increased with increasing initial hydrate saturation and back pressure. Moreover, the effective thermal conductivity was increased by the enlarged water distribution at the early period of hydrate dissociation and decreased by the enlarged gas distribution at the late period of hydrate dissociation. Gas slippage effect and gas-water gravity differentiation played important roles in these gas-water redistribution in the sample. Meanwhile, the sandy grain rearrangement was inferred to improve the contact quality among grains and thus also increased the effective thermal conductivity. Additionally, although there was hydrate dissociation rate of 0.36% during the measurements, the trends of the effective thermal conductivity were not supposed to change. This work may offer some reference to understand the mechanisms of heat transfer in the sediments during depressurization.
关键词	Depressurization and soaking Hydrate dissociation Effective thermal conductivity Electrical resistance Gas and water distribution Gravity differentiation
DOI	10.1016/j.jngse.2021.103878
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51576202] ; National Natural Science Foundation of China[51736009] ; National Natural Science Foundation of China[51879254] ; National Key R&D Program of China[2016YFC0304002] ; Special Project for Marine Economy Development of Guangdong Province[GDME-2018D002] ; CAS Science and Technology Apparatus Development Program[YZ201619]
WOS研究方向	Energy & Fuels ; Engineering
项目资助者	National Natural Science Foundation of China ; National Key R&D Program of China ; Special Project for Marine Economy Development of Guangdong Province ; CAS Science and Technology Apparatus Development Program
WOS类目	Energy & Fuels ; Engineering, Chemical
WOS记录号	WOS:000636385700002
出版者	ELSEVIER SCI LTD
引用统计	被引频次：10[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/344007/32921
专题	中国科学院广州能源研究所
通讯作者	Chen, Zhaoyang
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 Key Lab New & Renewable Energy Res & De, Guangzhou 510640, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.CNOOC Res Inst, State Key Lab Nat Gas Hydrates, Beijing 100028, 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	He, Juan,Li, Xiaosen,Chen, Zhaoyang,et al. Effective thermal conductivity changes of the hydrate-bearing quartz sands in depressurization and soaking[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2021,89:13.
APA	He, Juan.,Li, Xiaosen.,Chen, Zhaoyang.,Li, Qingping.,Xia, Zhiming.,...&You, Changyu.(2021).Effective thermal conductivity changes of the hydrate-bearing quartz sands in depressurization and soaking.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,89,13.
MLA	He, Juan,et al."Effective thermal conductivity changes of the hydrate-bearing quartz sands in depressurization and soaking".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 89(2021):13.