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  4. 海洋地质与环境重点实验室
Seafloor breathing helping forecast hydrate-related geohazards

文献类型：期刊论文

作者Zhu, Chaoqi1,2,3,4; Li, Zhenghui1; Chen, Duanxin5; Li, Sanzhong3,6; Song, Xiaoshuai1; Shan, Hongxian1,2; Jia, Yonggang1,2
刊名ENERGY REPORTS
出版日期2021-11-01
卷号7页码:8108-8114
ISSN号2352-4847
关键词Gas hydrate Geohazards Seafloor deformation Overpressure Inflation-deflation cycle
DOI10.1016/j.egyr.2021.08.187
通讯作者Zhu, Chaoqi(george-zhu@foxmail.com) ; Jia, Yonggang(yonggang@ouc.edu.cn)
英文摘要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.
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
语种英语
出版者ELSEVIER
WOS记录号WOS:000727772800006
源URL[http://ir.qdio.ac.cn/handle/337002/177308]  
专题海洋研究所_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.

入库方式： OAI收割

来源：海洋研究所

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