Intrinsic correlation between the generalized phase equilibrium condition and mechanical behaviors in hydrate-bearing sediments
文献类型：期刊论文
| 作者 | Zhou, Jiazuo2; Wei, Changfu1; Yan, Rongtao3; Zhou, Yuan1; Dong, Yi1 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2024-07-01 |
| 卷号 | 16期号:7页码:2822-2832 |
| 关键词 | Hydrate-bearing sediment Generalized phase equilibrium Unhydrated water Partial dissociation Mechanical behavior |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2023.11.0381674-7755 |
| 英文摘要 | The phase equilibrium and mechanical behaviors of natural gas hydrate-bearing sediment are essential for gas recovery from hydrate reservoirs. In heating closed systems, the temperature-pressure path of hydrate-bearing sediment deviates from that of pure bulk hydrate, reflecting the porous media effect in phase equilibrium. A generalized phase equilibrium equation was established for hydrate-bearing sediments, which indicates that both capillary and osmotic pressures cause the phase equilibrium curve to shift leftward on the temperature-pressure plane. In contrast to bulk hydrate, hydrate-bearing sediment always contains a certain amount of unhydrated water, which keeps phase equilibrium with the hydrate within the hydrate stability field. With changes in temperature and pressure, a portion of pore hydrate and unhydrated water may transform into each other, affecting the shear strength of hydrate-bearing sediment. A shear strength model is proposed to consider not only hydrate saturation but also the change in temperature and pressure of hydrate-bearing sediment. The model is validated by experimental data with various hydrate saturation, temperature and pressure conditions. The deformation induced by partial dissociation was studied through depressurization tests under constant effective stress. The reduction in gas pressure within the hydrate stability field indeed caused sediment deformation. The dissociation-induced deformation can be reasonably estimated as the difference in volume between hydrate-bearing and hydrate-free sediments from the compression curves. (c) 2024 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/). |
| 资助项目 | National Natural Science Foundation of China[42171135] ; National Natural Science Foundation of China[12262009] ; The CUG Scholar Scientific Research Funds at China University of Geosciences (Wuhan)[2022098] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001270308200001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42013]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zhou, Jiazuo; Yan, Rongtao |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan, Peoples R China 2.China Univ Geosci, Coll Marine Sci & Technol, Hubei Key Lab Marine Geol Resources, Wuhan, Peoples R China 3.Guilin Univ Technol, Coll Civil Engn & Architecture, Guangxi Key Lab New Energy & Bldg Energy Saving, Guilin, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Jiazuo,Wei, Changfu,Yan, Rongtao,et al. Intrinsic correlation between the generalized phase equilibrium condition and mechanical behaviors in hydrate-bearing sediments[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2024,16(7):2822-2832. |
| APA | Zhou, Jiazuo,Wei, Changfu,Yan, Rongtao,Zhou, Yuan,&Dong, Yi.(2024).Intrinsic correlation between the generalized phase equilibrium condition and mechanical behaviors in hydrate-bearing sediments.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,16(7),2822-2832. |
| MLA | Zhou, Jiazuo,et al."Intrinsic correlation between the generalized phase equilibrium condition and mechanical behaviors in hydrate-bearing sediments".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 16.7(2024):2822-2832. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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