中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 广州能源研究所
  3. 中国科学院广州能源研究所
Effective thermal conductivity changes of the hydrate-bearing quartz sands in depressurization and soaking

文献类型：期刊论文

作者He, Juan1,3,4,5; Li, Xiaosen1,2,4,5; Chen, Zhaoyang1,2,4,5; Li, Qingping2; Xia, Zhiming1,4,5; Zhang, Yu1,4,5; Wang, Yi1,4,5; You, Changyu1,3,4
刊名JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
出版日期2021-05-01
卷号89页码:13
ISSN号1875-5100
关键词Depressurization and soaking Hydrate dissociation Effective thermal conductivity Electrical resistance Gas and water distribution Gravity differentiation
DOI10.1016/j.jngse.2021.103878
通讯作者Chen, Zhaoyang(chenzy@ms.giec.ac.cn)
英文摘要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.
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
语种英语
出版者ELSEVIER SCI LTD
WOS记录号WOS:000636385700002
资助机构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
源URL[http://ir.giec.ac.cn/handle/344007/32920]  
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, Key Lab Gas Hydrate, Guangzhou 510640, Peoples R China
2.CNOOC Res Inst, State Key Lab Nat Gas Hydrates, Beijing 100028, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
5.Guangdong Key Lab New & Renewable Energy Res & De, Guangzhou 510640, Peoples R China
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.

入库方式： OAI收割

来源：广州能源研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。