Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Effective thermal conductivity changes of the hydrate-bearing quartz sands in depressurization and soaking | |
He, Juan1,2,3,4; Li, Xiaosen1,2,3,5 ; Chen, Zhaoyang1,2,3,5; Li, Qingping5; Xia, Zhiming1,2,3; Zhang, Yu1,2,3; Wang, Yi1,2,3; You, Changyu1,2,4
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| 2021-05-01 | |
| Source Publication | JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
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| ISSN | 1875-5100 |
| Volume | 89Pages:13 |
| Corresponding Author | Chen, Zhaoyang(chenzy@ms.giec.ac.cn) |
| Abstract | 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. |
| Keyword | Depressurization and soaking Hydrate dissociation Effective thermal conductivity Electrical resistance Gas and water distribution Gravity differentiation |
| DOI | 10.1016/j.jngse.2021.103878 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Energy & Fuels ; Engineering |
| Funding Organization | 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 Subject | Energy & Fuels ; Engineering, Chemical |
| WOS ID | WOS:000636385700002 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/32921 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Chen, Zhaoyang |
| Affiliation | 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 |
| First Author Affilication | GuangZhou Institute of Energy Conversion,Chinese Academy of Sciences |
| Recommended Citation 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. |
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