Initiation and expansion of layered fracture in sediments due to thermal-induced hydrate dissociation

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Initiation and expansion of layered fracture in sediments due to thermal-induced hydrate dissociation
	Zhang XH(张旭辉); Lu XB(鲁晓兵)
刊名	Journal of Petroleum Science and Engineering
	2015-09
通讯作者邮箱	zhangxuhui@imech.ac.cn ; xblu@imech.ac.cn
卷号	133 页码:881-888
关键词	hydrate-bearing sediment hydrate dissociation excess pore gas pressure dissociation zone layered fracture
ISSN号	0920-4105
通讯作者	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.
产权排序	[Zhang, X. H.; Lu, X. B.] Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Res Ctr Gas Hydrate & Soil Mech, Beijing 100190, Peoples R China
中文摘要	Methane 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,
分类号	一类
类目[WOS]	Energy & Fuels ; Engineering, Petroleum
研究领域[WOS]	Energy & Fuels ; Engineering
关键词[WOS]	GAS-HYDRATE ; BEARING SEDIMENTS ; STRENGTH ; BEHAVIOR ; SLOPE
收录类别	SCI ; EI
原文出处	http://dx.doi.org/10.1016/j.petrol.2015.03.024
语种	英语
WOS记录号	WOS:000365253300084
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/58321]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
推荐引用方式 GB/T 7714	Zhang XH,Lu XB. 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.(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.