Testing a thermo-chemo-hydro-geomechanical model for gas hydrate-bearing sediments using triaxial compression laboratory experiments
Natural gas hydrates are considered a potential resource for gas production on industrial scales. Gas hydrates contribute to the strength and stiffness of the hydrate-bearing sediments. During gas production, the geomechanical stability of the sediment is compromised. Due to the potential geotechnic...
Published in: | Geochemistry, Geophysics, Geosystems |
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ftoceanrep:oai:oceanrep.geomar.de:39544 2023-05-15T17:12:08+02:00 Testing a thermo-chemo-hydro-geomechanical model for gas hydrate-bearing sediments using triaxial compression laboratory experiments Gupta, Shubhangi Deusner, Christian Haeckel, Matthias Helmig, R. Wohlmuth, B. 2017-09-13 text https://oceanrep.geomar.de/id/eprint/39544/ https://oceanrep.geomar.de/id/eprint/39544/7/Gupta_et_al-2017-Geochemistry,_Geophysics,_Geosystems.pdf https://doi.org/10.1002/2017GC006901 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/39544/7/Gupta_et_al-2017-Geochemistry,_Geophysics,_Geosystems.pdf Gupta, S. , Deusner, C. , Haeckel, M. , Helmig, R. and Wohlmuth, B. (2017) Testing a thermo-chemo-hydro-geomechanical model for gas hydrate-bearing sediments using triaxial compression laboratory experiments. Open Access Geochemistry, Geophysics, Geosystems, 18 (9). pp. 3419-3437. DOI 10.1002/2017GC006901 <https://doi.org/10.1002/2017GC006901>. doi:10.1002/2017GC006901 info:eu-repo/semantics/openAccess Article PeerReviewed info:eu-repo/semantics/article 2017 ftoceanrep https://doi.org/10.1002/2017GC006901 2023-04-07T15:35:41Z Natural gas hydrates are considered a potential resource for gas production on industrial scales. Gas hydrates contribute to the strength and stiffness of the hydrate-bearing sediments. During gas production, the geomechanical stability of the sediment is compromised. Due to the potential geotechnical risks and process management issues, the mechanical behavior of the gas hydrate-bearing sediments needs to be carefully considered. In this study, we describe a coupling concept that simplifies the mathematical description of the complex interactions occurring during gas production by isolating the effects of sediment deformation and hydrate phase changes. Central to this coupling concept is the assumption that the soil grains form the load-bearing solid skeleton, while the gas hydrate enhances the mechanical properties of this skeleton. We focus on testing this coupling concept in capturing the overall impact of geomechanics on gas production behavior though numerical simulation of a high-pressure isotropic compression experiment combined with methane hydrate formation and dissociation. We consider a linear-elastic stress-strain relationship because it is uniquely defined and easy to calibrate. Since, in reality, the geomechanical response of the hydrate-bearing sediment is typically inelastic and is characterized by a significant shear-volumetric coupling, we control the experiment very carefully in order to keep the sample deformations small and well within the assumptions of poroelasticity. The closely coordinated experimental and numerical procedures enable us to validate the proposed simplified geomechanics-to-flow coupling, and set an important precursor toward enhancing our coupled hydro-geomechanical hydrate reservoir simulator with more suitable elastoplastic constitutive models. Article in Journal/Newspaper Methane hydrate OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Geochemistry, Geophysics, Geosystems 18 9 3419 3437 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Natural gas hydrates are considered a potential resource for gas production on industrial scales. Gas hydrates contribute to the strength and stiffness of the hydrate-bearing sediments. During gas production, the geomechanical stability of the sediment is compromised. Due to the potential geotechnical risks and process management issues, the mechanical behavior of the gas hydrate-bearing sediments needs to be carefully considered. In this study, we describe a coupling concept that simplifies the mathematical description of the complex interactions occurring during gas production by isolating the effects of sediment deformation and hydrate phase changes. Central to this coupling concept is the assumption that the soil grains form the load-bearing solid skeleton, while the gas hydrate enhances the mechanical properties of this skeleton. We focus on testing this coupling concept in capturing the overall impact of geomechanics on gas production behavior though numerical simulation of a high-pressure isotropic compression experiment combined with methane hydrate formation and dissociation. We consider a linear-elastic stress-strain relationship because it is uniquely defined and easy to calibrate. Since, in reality, the geomechanical response of the hydrate-bearing sediment is typically inelastic and is characterized by a significant shear-volumetric coupling, we control the experiment very carefully in order to keep the sample deformations small and well within the assumptions of poroelasticity. The closely coordinated experimental and numerical procedures enable us to validate the proposed simplified geomechanics-to-flow coupling, and set an important precursor toward enhancing our coupled hydro-geomechanical hydrate reservoir simulator with more suitable elastoplastic constitutive models. |
format |
Article in Journal/Newspaper |
author |
Gupta, Shubhangi Deusner, Christian Haeckel, Matthias Helmig, R. Wohlmuth, B. |
spellingShingle |
Gupta, Shubhangi Deusner, Christian Haeckel, Matthias Helmig, R. Wohlmuth, B. Testing a thermo-chemo-hydro-geomechanical model for gas hydrate-bearing sediments using triaxial compression laboratory experiments |
author_facet |
Gupta, Shubhangi Deusner, Christian Haeckel, Matthias Helmig, R. Wohlmuth, B. |
author_sort |
Gupta, Shubhangi |
title |
Testing a thermo-chemo-hydro-geomechanical model for gas hydrate-bearing sediments using triaxial compression laboratory experiments |
title_short |
Testing a thermo-chemo-hydro-geomechanical model for gas hydrate-bearing sediments using triaxial compression laboratory experiments |
title_full |
Testing a thermo-chemo-hydro-geomechanical model for gas hydrate-bearing sediments using triaxial compression laboratory experiments |
title_fullStr |
Testing a thermo-chemo-hydro-geomechanical model for gas hydrate-bearing sediments using triaxial compression laboratory experiments |
title_full_unstemmed |
Testing a thermo-chemo-hydro-geomechanical model for gas hydrate-bearing sediments using triaxial compression laboratory experiments |
title_sort |
testing a thermo-chemo-hydro-geomechanical model for gas hydrate-bearing sediments using triaxial compression laboratory experiments |
publisher |
AGU (American Geophysical Union) |
publishDate |
2017 |
url |
https://oceanrep.geomar.de/id/eprint/39544/ https://oceanrep.geomar.de/id/eprint/39544/7/Gupta_et_al-2017-Geochemistry,_Geophysics,_Geosystems.pdf https://doi.org/10.1002/2017GC006901 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
https://oceanrep.geomar.de/id/eprint/39544/7/Gupta_et_al-2017-Geochemistry,_Geophysics,_Geosystems.pdf Gupta, S. , Deusner, C. , Haeckel, M. , Helmig, R. and Wohlmuth, B. (2017) Testing a thermo-chemo-hydro-geomechanical model for gas hydrate-bearing sediments using triaxial compression laboratory experiments. Open Access Geochemistry, Geophysics, Geosystems, 18 (9). pp. 3419-3437. DOI 10.1002/2017GC006901 <https://doi.org/10.1002/2017GC006901>. doi:10.1002/2017GC006901 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2017GC006901 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
18 |
container_issue |
9 |
container_start_page |
3419 |
op_container_end_page |
3437 |
_version_ |
1766068905486319616 |