A chemo-thermo-mechanically coupled numerical simulation of the subsurface ground deformations due to methane hydrate dissociation
A chemo-thermo-mechanically coupled numerical simulation of the subsurface ground deformations due to methane hydrate dissociation
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DOI：
10.1016/j.compgeo.2007.02.006
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发表时间：
2007-01-01
影响因子：
5.3
通讯作者：
Fujiwaki, Masaya
中科院分区：
文献类型：
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作者：
Kimoto, Sayuri;Oka, Fusao;Fujiwaki, Masaya
为了预测由于甲烷水合物的分解地面变形，我们已经开发了一种模拟方法的基础上的化学-热-机械耦合分析。在该方法中，水合物到流体的相变、孔隙水和气体的流动、固体骨架的力学行为以及传热都可以同时求解。数值方法是基于有限元法，使用更新的拉格朗日公式。应用所提出的框架，我们已经数值分析了发生在天然气生产的加热和减压方法的解离过程。据预测，地面变形是由于水和气体的产生过程中的离解。(c)2007爱思唯尔有限公司保留所有权利。
In order to predict ground deformations due to the dissociation of methane hydrates, we have developed a simulation method based on a chemo-thermo-mechanically coupled analysis. Within this method, the phase change from hydrates to fluids, the flow of pore water and gas, the mechanical behavior of the solid skeleton, and heat transfer can all be simultaneously solved. The numerical method is based on the finite element method using an updated Lagrangian formulation. Applying the proposed framework, we have numerically analyzed the dissociation process that occurs in the heating and depressurizing methods of natural gas production. It has been predicted that ground deformation is caused by the generation of water and gas during the dissociation process. (c) 2007 Elsevier Ltd. All rights reserved.