Formation of layered fracture and outburst during gas hydrate dissociation

Hydrate dissociation in marine sediments may cause large hazards. Two types of new hazard phenomena, outburst and layered fracture, are observed in laboratory experiments and the initiation mechanism is discussed. Experiments are carried out in a two-dimensional rectangular box and a one-dimensional...

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Bibliographic Details
Published in:Journal of Petroleum Science and Engineering
Main Authors: 张旭辉, 鲁晓兵, 李清平, Zhang, XH (reprint author), Chinese Acad Sci, Inst Mech, Lab Hydrodynam & Ocean Engn, Beijing 100190, Peoples R China
Format: Article in Journal/Newspaper
Language:English
Published: 2011
Subjects:
Hydrate Dissociation
Excess Pore Pressure
Dissociation Zone
Layered Fracture
Outburst
Methane Hydrate
Slope
Sediments
Norway
Slide
Engineering
Geology
Energy & Fuels
Petroleum
一类
mud
translation
sedimentary deposits
sedimente
sediments (francais)
silts
sediment
sedimentary materials (geological)
quaternary sediments
spitsbergen
平移
滑塌
Methane hydrate
Spitsbergen
Online Access:http://dspace.imech.ac.cn/handle/311007/45036
https://doi.org/10.1016/j.petrol.2011.01.013
Description
Summary:Hydrate dissociation in marine sediments may cause large hazards. Two types of new hazard phenomena, outburst and layered fracture, are observed in laboratory experiments and the initiation mechanism is discussed. Experiments are carried out in a two-dimensional rectangular box and a one-dimensional cylinder, respectively. It is shown that layered fracture and outburst can appear after hydrate dissociation and are related closely to dissociation speed, permeability, strength of hydrate-bearing sediment and over-layered stratum. Outburst often occurs at low permeability, high strength of over layered stratum and high pore pressure, while layered fracture is just on the contrary. (C) 2011 Elsevier B.V. All rights reserved.

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