Mechanical properties of consolidated water-saturated natural gas hydrate-bearing silty-clayey sediments under undrained shearing conditions
文献类型：期刊论文
| 作者 | Wang, Aowang3; Zhang, Chenyi3; Luo, Tingting3; Ma, Chaozheng3; Zhao, Yi3; You, Zeshao2; Sun, Xiang2; Li, Yanghui1; Song, Yongchen1; Yang, Weihao3 |
| 刊名 | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
 |
| 出版日期 | 2025-01-20 |
| 卷号 | 99页码:996-1009 |
| 关键词 | Natural gas hydrate Silty-clayey sediment Water saturation Undrained shearing Mechanical properties Strength |
| ISSN号 | 0360-3199 |
| DOI | 10.1016/j.ijhydene.2024.12.271 |
| 英文摘要 | The South China Sea (SCS) is known for its abundant natural gas hydrate (NGH) resources, where hosts a reservoir matrix predominantly composed of silts and clays and is characterized by low permeability and a relatively shallow burial depth. These inherent characteristics render the extraction of hydrate more challenging, underscoring the critical importance of investigating the mechanical properties of the reservoir under undrained conditions. To this end, the geological conditions of hydrate reservoir in the SCS are simulated, and the consolidated undrained shearing test of hydrate-bearing silty-clayey sediments under different hydrate saturation and effective confining pressure conditions are carried out in this study. The results show that the strength, stiffness, and cohesion of these sediments experience a significant increase with rising hydrate saturation and effective confining pressure. Notably, the cohesion can increase by up to 150% at a 25% hydrate saturation level. Conversely, the internal friction angle exhibits a slight decrease from 33.43 degrees to 32.06 degrees. The pore water pressure within the sediments increases nonlinearly with axial strain, eventually reaching a stable state. High levels of hydrate saturation substantially elevate pore water pressure at low effective confining pressures, but this effect is less pronounced under high effective confining pressure conditions. The volumetric deformation of the sediments follows a pattern of initial shearing shrinkage followed by dilation of volume, culminating in a final volume change of less than 0.5%. The presence of hydrate not only increases the initial and final porosity of the sediments but also significantly bolsters their resistance to deformation. There is a tendency for the pore volume to contract when deviatoric stress is dominant, and an opposing trend when pore water pressure is the dominant factor. This study aspires to offer theoretical support for the investigation into the influence of NGH on the mechanical properties of silty-clayey reservoirs under undrained conditions. |
| 资助项目 | National Natural Science Founda-tion of China[42106210] |
| WOS研究方向 | Chemistry ; Electrochemistry ; Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:001393379100001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/37802]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Luo, Tingting |
| 作者单位 | 1.Dalian Univ Technol, Key Lab Ocean Energy Utilizat & Energy Conservat, Minist Educ, Dalian 116024, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan 430071, Peoples R China 3.China Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Intelligent Construct & Hlth Operat, Xuzhou 221116, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Aowang,Zhang, Chenyi,Luo, Tingting,et al. Mechanical properties of consolidated water-saturated natural gas hydrate-bearing silty-clayey sediments under undrained shearing conditions[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2025,99:996-1009. |
| APA | Wang, Aowang.,Zhang, Chenyi.,Luo, Tingting.,Ma, Chaozheng.,Zhao, Yi.,...&Yang, Weihao.(2025).Mechanical properties of consolidated water-saturated natural gas hydrate-bearing silty-clayey sediments under undrained shearing conditions.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,99,996-1009. |
| MLA | Wang, Aowang,et al."Mechanical properties of consolidated water-saturated natural gas hydrate-bearing silty-clayey sediments under undrained shearing conditions".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 99(2025):996-1009. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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