| Seafloor breathing helping forecast hydrate-related geohazards | |
| Zhu, Chaoqi1,2,3,4; Li, Zhenghui1; Chen, Duanxin5; Li, Sanzhong3,6; Song, Xiaoshuai1; Shan, Hongxian1,2; Jia, Yonggang1,2 | |
| 2021-11-01 | |
| 发表期刊 | ENERGY REPORTS
 |
| ISSN | 2352-4847 |
| 卷号 | 7页码:8108-8114 |
| 通讯作者 | Zhu, Chaoqi([email protected]) ; Jia, Yonggang([email protected]) |
| 摘要 | Gas hydrate dissociation may pose serious geohazards. The response of the seafloor to hydrate dissociation is important for geohazards, marine environments and global climate. We studied how hydrate dissociation affects underground temperature and pressure and how dissociation may lead to seafloor deformation. Here, we designed a laboratory model experiment to visualize fluid migration and seafloor deformation during hydrate dissociation at atmospheric pressure. Our experiments show visible gas pipes, migratory gas and gas pockets due to hydrate dissociation and explain the newly discovered discordance between the slide plane and the base of the gas hydrate stability zone. We found that the underlying free gas and gas conduits not only are favorable factors for forming hydrates but also can be promoted by hydrate dissociation. The temperature, pressure, and seafloor deformation are collected during the experiments. Our results show that the hydrate dissociation process is an endothermic reaction. More importantly, hydrate dissociation-induced overpressure exhibits a sudden decrease after slow growth and this inflation-deflation cycle resembles breathing. In our experiments, seafloor deformation are dominated by underground overpressure and lags up to about ten minutes. This deformation pattern could help forecast seafloor subsidence based on deformation observations. Overpressure monitoring is effective and saves time to cope with imminent geohazards. This pattern is important for geologists and engineers to forecast hydrate-related geohazards. (C) 2021 The Authors. Published by Elsevier Ltd. |
| 关键词 | Gas hydrate Geohazards Seafloor deformation Overpressure Inflation-deflation cycle |
| DOI | 10.1016/j.egyr.2021.08.187 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[41831280]; National Natural Science Foundation of China[41776068]; National Natural Science Foundation of China[91958216]; Hainan Key Laboratory of Marine Geologi-cal Resources and Environment, China[HNHYDZZY-HJKF008] |
| WOS研究方向 | Energy & Fuels |
| WOS类目 | Energy & Fuels |
| WOS记录号 | WOS:000727772800006 |
| 出版者 | ELSEVIER |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/177309 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Zhu, Chaoqi; Jia, Yonggang |
| 作者单位 | 1.Ocean Univ China, Shandong Prov Key Lab Marine Environm & Geol Engn, Qingdao 266100, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China 3.Ocean Univ China, Key Lab Submarine Geosci & Prospecting Tech, Minist Educ, Qingdao 266100, Peoples R China 4.Hainan Key Lab Marine Geol Resources & Environm, Haikou 570206, Hainan, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Shandong 266071, Peoples R China 6.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266061, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, Chaoqi,Li, Zhenghui,Chen, Duanxin,et al. Seafloor breathing helping forecast hydrate-related geohazards[J]. ENERGY REPORTS,2021,7:8108-8114. |
| APA | Zhu, Chaoqi.,Li, Zhenghui.,Chen, Duanxin.,Li, Sanzhong.,Song, Xiaoshuai.,...&Jia, Yonggang.(2021).Seafloor breathing helping forecast hydrate-related geohazards.ENERGY REPORTS,7,8108-8114. |
| MLA | Zhu, Chaoqi,et al."Seafloor breathing helping forecast hydrate-related geohazards".ENERGY REPORTS 7(2021):8108-8114. |
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