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Numerical simulation of mechanical compaction of deepwater shallow sediments

文献类型：期刊论文

作者Sun, Jin4; Deng, Jingen2; Lin, Hai1; Zhang, Hanyu4; Wang, Jiliang4; Gao, Jinwei4; Sun, Jin(Chinese Acad Sci, Inst Deep Sea Sci & Engn, Lab Marine Geophys & Georesources, Sanya 572000, Peoples R China); Wu, Shiguo3,4,5
刊名JOURNAL OF OCEAN UNIVERSITY OF CHINA
出版日期2018-02-01
卷号17期号:1页码:53-64
关键词Mechanical Compaction Deepwater Shallow Sediments Compaction Law Shallow Water Flow Overpressure Evolution
DOI10.1007/s11802-018-3461-6
产权排序第1完成单位 ; 第2完成单位 ; 第3完成单位 ; 第4完成单位 ; 第5完成单位
文献子类Article
英文摘要To study the compaction law and overpressure evolution in deepwater shallow sediments, a large-strain compaction model that considers material nonlinearity and moving boundary is formulated. The model considers the dependence of permeability and material properties on void ratio. The modified Cam-Clay model is selected as the constitutive relations of the sediments, and the deactivation/reactivation method is used to capture the moving top surface during the deposition process. A one-dimensional model is used to study the compaction law of the shallow sediments. Results show that the settlement of the shallow sediments is large under their own weight during compaction. The void ratio decreases strictly with burial depth and decreases more quickly near the seafloor than in the deeper layers. The generation of abnormal pressure in the shallow flow sands is closely related to the compaction law of shallow sediments. The two main factors that affect the generation of overpressure in the sands are deposition rate and permeability of overlying clay sediments. Overpressure increases with an increase in deposition rate and a decrease in the permeability of the overlying clay sediment. Moreover, an upper limit for the overpressure exists. A two-dimensional model is used to study the differential compaction of the shallow sediments. The pore pressure will still increase due to the inflow of the pore fluid from the neighboring clay sediment even though the deposition process is interrupted.
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WOS关键词CONSOLIDATION ; BASINS ; CLAYS ; MODEL
语种英语
WOS记录号WOS:000419533800007
源URL[http://ir.idsse.ac.cn/handle/183446/5257]  
专题深海科学研究部_深海地球物理与资源研究室
通讯作者Sun, Jin; Sun, Jin(Chinese Acad Sci, Inst Deep Sea Sci & Engn, Lab Marine Geophys & Georesources, Sanya 572000, Peoples R China)
作者单位1.CNOOC China Ltd, Tianjin Branch, Tianjin 300451, Peoples R China
2.China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing 102249, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Lab Marine Geophys & Georesources, Sanya 572000, Peoples R China
5.Qingdao Natl Lab Marine Sci & Technol, Qingdao 266237, Peoples R China
推荐引用方式
GB/T 7714		 Sun, Jin,Deng, Jingen,Lin, Hai,et al. Numerical simulation of mechanical compaction of deepwater shallow sediments[J]. JOURNAL OF OCEAN UNIVERSITY OF CHINA,2018,17(1):53-64.
APA Sun, Jin.,Deng, Jingen.,Lin, Hai.,Zhang, Hanyu.,Wang, Jiliang.,...&Wu, Shiguo.(2018).Numerical simulation of mechanical compaction of deepwater shallow sediments.JOURNAL OF OCEAN UNIVERSITY OF CHINA,17(1),53-64.
MLA Sun, Jin,et al."Numerical simulation of mechanical compaction of deepwater shallow sediments".JOURNAL OF OCEAN UNIVERSITY OF CHINA 17.1(2018):53-64.

入库方式： OAI收割

来源：深海科学与工程研究所

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