Dissociation-Induced Deformation of Hydrate-Bearing Silty Sand During Depressurization Under Constant Effective Stress
文献类型：期刊论文
| 作者 | Zhou, Jiazuo2; Zhou, Yuan2; Yang, Zhoujie1; Wei, Changfu1,2; Wei, Houzhen2; Yan, Rongtao1 |
| 刊名 | GEOPHYSICAL RESEARCH LETTERS
 |
| 出版日期 | 2021-07-28 |
| 卷号 | 48期号:14页码:10 |
| 关键词 | hydrate-bearing sediment depressurized dissociation constant effective stress partial dissociation phase boundary |
| ISSN号 | 0094-8276 |
| DOI | 10.1029/2021GL092860 |
| 英文摘要 | Hydrate dissociation-induced deformation plays a crucial role in reservoir stability during the exploitation of natural gas hydrates. During the depressurization-induced dissociation of pore hydrate, both hydrate saturation loss and effective stress rise tend to enhance the deformation. Previous studies have not been able to distinguish between deformations caused by these two factors. In this study, triaxial tests were conducted on carbon dioxide hydrate-bearing sediments with constant effective stress but continuously decreasing gas pressure. Another stepwise depressurization test was conducted as a supplement to monitor the variation of hydrate saturation. The results show that the partial dissociation of hydrate along with the change of pressure-temperature state cause deformation within the hydrate-stability field. Effective confining pressure compresses the dissociating sediment under isotropic stress but restrains compression under constant deviatoric stress. Deviatoric stress enhances the deformation during axial loading, creep and depressurization-induced dissociation. |
| 资助项目 | National Natural Science Foundation of China[51939011] ; National Natural Science Foundation of China[11962004] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000711496700017 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/28392]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zhou, Jiazuo; Wei, Changfu |
| 作者单位 | 1.Guilin Univ Technol, Coll Civil Engn & Architecture, Guangxi Key Lab New Energy & Bldg Energy Saving, Guilin, Guangxi, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Jiazuo,Zhou, Yuan,Yang, Zhoujie,et al. Dissociation-Induced Deformation of Hydrate-Bearing Silty Sand During Depressurization Under Constant Effective Stress[J]. GEOPHYSICAL RESEARCH LETTERS,2021,48(14):10. |
| APA | Zhou, Jiazuo,Zhou, Yuan,Yang, Zhoujie,Wei, Changfu,Wei, Houzhen,&Yan, Rongtao.(2021).Dissociation-Induced Deformation of Hydrate-Bearing Silty Sand During Depressurization Under Constant Effective Stress.GEOPHYSICAL RESEARCH LETTERS,48(14),10. |
| MLA | Zhou, Jiazuo,et al."Dissociation-Induced Deformation of Hydrate-Bearing Silty Sand During Depressurization Under Constant Effective Stress".GEOPHYSICAL RESEARCH LETTERS 48.14(2021):10. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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