Micromechanical Investigation of Stress Relaxation in Gas Hydrate-Bearing Sediments Due to Sand Production
Past experience of gas production from methane-hydrate-bearing sediments indicates that sand migration is a major factor restricting the production of gas from methane-hydrate reservoirs. One important geotechnical aspect of sand migration is the influence of grain detachment on the existing stresse...
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ftmdpi:oai:mdpi.com:/1996-1073/12/11/2131/ 2023-09-05T13:21:06+02:00 Micromechanical Investigation of Stress Relaxation in Gas Hydrate-Bearing Sediments Due to Sand Production Eitan Cohen Assaf Klar Koji Yamamoto 2019-06-04 application/pdf https://doi.org/10.3390/en12112131 EN eng Multidisciplinary Digital Publishing Institute H: Geo-Energy https://dx.doi.org/10.3390/en12112131 https://creativecommons.org/licenses/by/4.0/ Energies; Volume 12; Issue 11; Pages: 2131 gas hydrate sand migration sand production stress relaxation discrete element method Text 2019 ftmdpi https://doi.org/10.3390/en12112131 2023-08-13T23:52:30Z Past experience of gas production from methane-hydrate-bearing sediments indicates that sand migration is a major factor restricting the production of gas from methane-hydrate reservoirs. One important geotechnical aspect of sand migration is the influence of grain detachment on the existing stresses. This paper focuses on understanding and quantifying the nature of this aspect using different approaches, with a focus on discrete element method (DEM) simulations of sand detachment from hydrate-bearing sand samples. The investigation in the paper reveals that sand migration affects isotropic and deviatoric stresses differently. In addition, the existence of hydrate moderates the magnitude of stress relaxation. Both of these features are currently missing from continuum-based models, and therefore, a new constitutive model for stress relaxation is suggested, incorporating the research findings. Model parameters are suggested based on the DEM simulations. The model is suitable for continuum mechanics-based simulations of gas production from hydrate reservoirs. Text Methane hydrate MDPI Open Access Publishing Energies 12 11 2131 |
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English |
topic |
gas hydrate sand migration sand production stress relaxation discrete element method |
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gas hydrate sand migration sand production stress relaxation discrete element method Eitan Cohen Assaf Klar Koji Yamamoto Micromechanical Investigation of Stress Relaxation in Gas Hydrate-Bearing Sediments Due to Sand Production |
topic_facet |
gas hydrate sand migration sand production stress relaxation discrete element method |
description |
Past experience of gas production from methane-hydrate-bearing sediments indicates that sand migration is a major factor restricting the production of gas from methane-hydrate reservoirs. One important geotechnical aspect of sand migration is the influence of grain detachment on the existing stresses. This paper focuses on understanding and quantifying the nature of this aspect using different approaches, with a focus on discrete element method (DEM) simulations of sand detachment from hydrate-bearing sand samples. The investigation in the paper reveals that sand migration affects isotropic and deviatoric stresses differently. In addition, the existence of hydrate moderates the magnitude of stress relaxation. Both of these features are currently missing from continuum-based models, and therefore, a new constitutive model for stress relaxation is suggested, incorporating the research findings. Model parameters are suggested based on the DEM simulations. The model is suitable for continuum mechanics-based simulations of gas production from hydrate reservoirs. |
format |
Text |
author |
Eitan Cohen Assaf Klar Koji Yamamoto |
author_facet |
Eitan Cohen Assaf Klar Koji Yamamoto |
author_sort |
Eitan Cohen |
title |
Micromechanical Investigation of Stress Relaxation in Gas Hydrate-Bearing Sediments Due to Sand Production |
title_short |
Micromechanical Investigation of Stress Relaxation in Gas Hydrate-Bearing Sediments Due to Sand Production |
title_full |
Micromechanical Investigation of Stress Relaxation in Gas Hydrate-Bearing Sediments Due to Sand Production |
title_fullStr |
Micromechanical Investigation of Stress Relaxation in Gas Hydrate-Bearing Sediments Due to Sand Production |
title_full_unstemmed |
Micromechanical Investigation of Stress Relaxation in Gas Hydrate-Bearing Sediments Due to Sand Production |
title_sort |
micromechanical investigation of stress relaxation in gas hydrate-bearing sediments due to sand production |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2019 |
url |
https://doi.org/10.3390/en12112131 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
Energies; Volume 12; Issue 11; Pages: 2131 |
op_relation |
H: Geo-Energy https://dx.doi.org/10.3390/en12112131 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/en12112131 |
container_title |
Energies |
container_volume |
12 |
container_issue |
11 |
container_start_page |
2131 |
_version_ |
1776201719433134080 |