Particle-scale study of the mechanical properties of sandy hydrate-bearing sediments using DEM combined with CT images
文献类型：期刊论文
| 作者 | Li, Yanghui2; Tian, Boyang2; You, Zeshao1; Qu, Yong2; Wu, Peng2; Song, Yongchen2 |
| 刊名 | ENERGY
 |
| 出版日期 | 2025-04-01 |
| 卷号 | 320页码:17 |
| 关键词 | Hydrate-bearing sands Hydrate distribution Mechanical behavior Particle scale Discrete element method |
| ISSN号 | 0360-5442 |
| DOI | 10.1016/j.energy.2025.135319 |
| 英文摘要 | Natural gas hydrate (NGH) is a promising clean energy source, understanding the mechanical properties of hydrate-bearing sediments (HBS) is hindered by the heterogeneous distribution of hydrates. While existing studies have explored sediment behavior, the effects of heterogeneous hydrate distribution and hydrate dissociation on HBS mechanics remain insufficiently addressed, limiting accurate prediction of reservoir deformation and NGH exploitation. In this study, the heterogeneous hydrate distribution was obtained based on X-ray computed tomography (CT) image. Heterogeneous HBS Digital cores' modeling and numerical biaxial compression experiments were conducted by the discrete element method (DEM). Hydrate dissociation was also considered, with particular attention to the effect of different dissociation degrees on the heterogeneous hydrate distribution HBS, including anisotropy, particle behaviour and mechanical property evolution. The results reveal that: 1) shear bands and particle rotation occur mainly in low hydrate saturation regions; 2) high hydrate saturation zones are crucial for the sediment's load-bearing capacity during shearing; and 3) as hydrate dissociation increases, the strength and stiffness of HBS decrease, fewer particles rotate, and anisotropy diminishes. These findings underscore the importance of considering hydrate distribution and dissociation effects in future HBS modeling, with broader implications for the safety and design of gas hydrate extraction. |
| 资助项目 | National Natural Science Founda-tion of China[52222608] ; National Natural Science Founda-tion of China[42206229] ; Dalian High-Level Talent Innovation Program[2022RQ019] |
| WOS研究方向 | Thermodynamics ; Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:001443171900001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/36872]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | You, Zeshao; Wu, Peng |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Dalian Univ Technol, Key Lab Ocean Energy Utilizat & Energy Conservat, Minist Educ, Dalian 116024, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Yanghui,Tian, Boyang,You, Zeshao,et al. Particle-scale study of the mechanical properties of sandy hydrate-bearing sediments using DEM combined with CT images[J]. ENERGY,2025,320:17. |
| APA | Li, Yanghui,Tian, Boyang,You, Zeshao,Qu, Yong,Wu, Peng,&Song, Yongchen.(2025).Particle-scale study of the mechanical properties of sandy hydrate-bearing sediments using DEM combined with CT images.ENERGY,320,17. |
| MLA | Li, Yanghui,et al."Particle-scale study of the mechanical properties of sandy hydrate-bearing sediments using DEM combined with CT images".ENERGY 320(2025):17. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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