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IMECH-IR  > 水动力学与海洋工程重点实验室(2009-2011)  > 会议论文
Title: A mathematical model for dissociation of gas hydrate
Author: Lu XB(鲁晓兵); Wang SY(王淑云); Zhang XH(张旭辉); Li QP(李清平); Zeng XH(曾晓辉)
Issued Date: 2009
Conference Name: 19th (2009) International OFFSHORE AND POLAR ENGINEERING CONFERENCE
Conference Date: June 21, 2009 - June 26, 2009
Conference Place: Osaka, Japan
Abstract: This paper presents a model for natural gas hydrate dissociation from the methane hydrate reservoir by depressurization or temperature-falling of the well. In this model, the controlling equations are consisted of quality conservation, momentum equilibrium and energy conservation equations. Four media: Free methane (gas), methane hydrate (solid), rock skeleton, and water (liquid) are in thermodynamic equilibrium. The heat suction by the dissociation and the convection-conduction are considered also. The geological formation is assumed to be uniform and the flow of free methane is regarded as flow through a porous media with porosity. It is shown that the dissociation rate increases with the increase of depressurization and the increase of initial saturation of gas hydrate and degrades fast with the distance from the boundary. The changes of the pressure on the boundary have large effects on the dissipation of the pore pressure. The changes of the heat conductivity have little effects on the dissociation of gas hydrate and the dissipation of pore pressure. Copyright © 2009 by The International Society of Offshore and Polar Engineers (ISOPE).
Keyword: Controlling equation ; Depressurizations ; Dissociation rates ; Energy conservation equations ; Flowthrough ; Geological formation ; Heat conductivity ; Heat suction ; Initial saturation ; Methane hydrates ; Porous Media ; Quality conservation ; Thermodynamic equilibria
Indexed Type: EI
Corresponding Author: Lu, X. B.
Source: Proceedings of the International Offshore and Polar Engineering Conference
Language: 英语
ISBN: 9781880653531
Content Type: 会议论文
URI: http://dspace.imech.ac.cn/handle/311007/60467
Appears in Collections:水动力学与海洋工程重点实验室(2009-2011)_会议论文

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