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Initiation and expansion of layered fracture in sediments due to thermal-induced hydrate dissociation
Zhang XH(张旭辉); Lu XB(鲁晓兵); Zhang, XH (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Res Ctr Gas Hydrate & Soil Mech, Beijing 100190, Peoples R China.
Source PublicationJournal of Petroleum Science and Engineering
2015-09
Volume133Pages:881-888
ISSN0920-4105
AbstractMethane hydrate dissociation in sediment may lead to geological hazards such as marine landslide, collapse of wellbore. The physical mechanisms, especially on the evolution of sediment damage, are not very clear sediment though some numerical simulations were presented based on conventional landslide. A failure form, namely layered fracture in sediment, was observed in experiments during hydrate dissociation, It was a gap tilled with gas and water formed from continuous sediment by the gas and water expansion. A large laterally distributed layered fracture in seabed is a potential mechanism for marine landslide formation due to the very small shear strength in the fracture. This issue was analyzed based on dimensionless method and a two-phase mathematical model. The extension of the method and results to relate the engineering problem were discussed also. A mathematical model for studying the initiation and expansion of layered fracture was presented first by decoupling the expansion of hydrate dissociation front, gas seepage, and the movement of soil layer. Then the critical condition for the initiation of layered fracture was obtained and the thickness expansion of the layered fracture was numerically analyzed. The results could be used to evaluate the development of layered fractures under the condition of different hydrate recovery methods and geo-mechanical properties of hydrate formations in the future and will be extended to the study on the mechanism of marine landslide. (C) 2015 Elsevier B.V. All rights reserved,
KeywordHydrate-bearing Sediment Hydrate Dissociation Excess Pore Gas Pressure Dissociation Zone Layered Fracture
DOI10.1016/j.petrol.2015.03.024
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000365253300084
WOS KeywordGAS-HYDRATE ; BEARING SEDIMENTS ; STRENGTH ; BEHAVIOR ; SLOPE
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Petroleum
Funding OrganizationThis study is supported by the National Natural Science Foundation of China (Nos. 11102209, 51239010, and 11272314). And many thanks to professor Ming Xiao from The Pennsylvania State University for revising the language of the paper.
DepartmentLMFS海洋土力学(LHO)
Classification一类
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58321
Collection流固耦合系统力学重点实验室
Corresponding AuthorZhang, XH (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Res Ctr Gas Hydrate & Soil Mech, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Zhang XH,Lu XB,Zhang, XH . Initiation and expansion of layered fracture in sediments due to thermal-induced hydrate dissociation[J]. Journal of Petroleum Science and Engineering,2015,133:881-888.
APA 张旭辉,鲁晓兵,&Zhang, XH .(2015).Initiation and expansion of layered fracture in sediments due to thermal-induced hydrate dissociation.Journal of Petroleum Science and Engineering,133,881-888.
MLA 张旭辉,et al."Initiation and expansion of layered fracture in sediments due to thermal-induced hydrate dissociation".Journal of Petroleum Science and Engineering 133(2015):881-888.
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