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Article

Thermo-Hydro-Mechanical Coupled Modeling of Methane Hydrate-Bearing Sediments: Formulation and Application

1
National Oceanography Centre, University of Southampton Waterfront Campus, European Way, Southampton SO14 3ZH, UK
2
Ocean and Earth Science, University of Southampton, European Way, Southampton SO14 3ZH, UK
3
Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya, 08034 Barcelona, Spain
*
Author to whom correspondence should be addressed.
Energies 2019, 12(11), 2178; https://doi.org/10.3390/en12112178
Received: 12 April 2019 / Revised: 3 June 2019 / Accepted: 4 June 2019 / Published: 7 June 2019
(This article belongs to the Special Issue Advances in Natural Gas Hydrates)
We present a fully coupled thermo-hydro-mechanical formulation for the simulation of sediment deformation, fluid and heat transport and fluid/solid phase transformations occurring in methane hydrate geological systems. We reformulate the governing equations of energy and mass balance of the Code_Bright simulator to incorporate hydrate as a new pore phase. The formulation also integrates the constitutive model Hydrate-CASM to capture the effect of hydrate saturation in the mechanical response of the sediment. The thermo-hydraulic capabilities of the formulation are validated against the results from a series of state-of-the-art simulators involved in the first international gas hydrate code comparison study developed by the NETL-USGS. The coupling with the mechanical formulation is investigated by modeling synthetic dissociation tests and validated by reproducing published experimental data from triaxial tests performed in hydrate-bearing sands dissociated via depressurization. Our results show that the formulation captures the dominant mass and heat transfer phenomena occurring during hydrate dissociation and reproduces the stress release and volumetric deformation associated with this process. They also show that the hydrate production method has a strong influence on sediment deformation. View Full-Text
Keywords: methane hydrate-bearing sediments; mechanical response induced by hydrate dissociation; thermo-hydro-mechanical behavior; fully coupled numerical modeling; geomechanics methane hydrate-bearing sediments; mechanical response induced by hydrate dissociation; thermo-hydro-mechanical behavior; fully coupled numerical modeling; geomechanics
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MDPI and ACS Style

De La Fuente, M.; Vaunat, J.; Marín-Moreno, H. Thermo-Hydro-Mechanical Coupled Modeling of Methane Hydrate-Bearing Sediments: Formulation and Application. Energies 2019, 12, 2178. https://doi.org/10.3390/en12112178

AMA Style

De La Fuente M, Vaunat J, Marín-Moreno H. Thermo-Hydro-Mechanical Coupled Modeling of Methane Hydrate-Bearing Sediments: Formulation and Application. Energies. 2019; 12(11):2178. https://doi.org/10.3390/en12112178

Chicago/Turabian Style

De La Fuente, Maria, Jean Vaunat, and Héctor Marín-Moreno. 2019. "Thermo-Hydro-Mechanical Coupled Modeling of Methane Hydrate-Bearing Sediments: Formulation and Application" Energies 12, no. 11: 2178. https://doi.org/10.3390/en12112178

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