The Effects of Coupling Stiffness and Slippage of Interface Between the Wellbore and Unconsolidated Sediment on the Stability Analysis of the Wellbore Under Gas Hydrate Production
Gas hydrates have great potential as future energy resources. Several productivity and stability analyses have been conducted for the Ulleung Basin, and the depressurization method is being considered for production. Under depressurization, ground settlement occurs near the wellbore and axial stress...
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ftmdpi:oai:mdpi.com:/1996-1073/12/21/4177/ 2024-06-09T07:47:42+00:00 The Effects of Coupling Stiffness and Slippage of Interface Between the Wellbore and Unconsolidated Sediment on the Stability Analysis of the Wellbore Under Gas Hydrate Production Jung-Tae Kim Ah-Ram Kim Gye-Chun Cho Chul-Whan Kang Joo Yong Lee 2019-11-01 application/pdf https://doi.org/10.3390/en12214177 eng eng Multidisciplinary Digital Publishing Institute B: Energy and Environment https://dx.doi.org/10.3390/en12214177 https://creativecommons.org/licenses/by/4.0/ Energies Volume 12 Issue 21 Pages: 4177 methane hydrate shear/normal coupling stiffness slippage at the interface wellbore stability analysis depressurization method Text 2019 ftmdpi https://doi.org/10.3390/en12214177 2024-05-14T23:37:13Z Gas hydrates have great potential as future energy resources. Several productivity and stability analyses have been conducted for the Ulleung Basin, and the depressurization method is being considered for production. Under depressurization, ground settlement occurs near the wellbore and axial stress develops. For a safe production test, it is essential to perform a stability analysis for the wellbore and hydrate-bearing sediments. In this study, the development of axial stress on the wellbore was investigated considering the coupling stiffness of the interface between the wellbore and sediment. A coupling stiffness model, which can consider both confining stress and slippage phenomena, was suggested and applied in a numerical simulation. Parametric analyses were conducted to investigate the effects of coupling stiffness and slippage on axial stress development. The results show that shear coupling stiffness has a significant effect on wellbore stability, while normal coupling stiffness has a minor effect. In addition, the maximum axial stress of the well bore has an upper limit depending on the magnitude of the confining stress, and the axial stress converges to this upper limit due to slipping at the interface. The results can be used as fundamental data for the design of wellbore under depressurization-based gas production. Text Methane hydrate MDPI Open Access Publishing Energies 12 21 4177 |
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MDPI Open Access Publishing |
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ftmdpi |
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English |
topic |
methane hydrate shear/normal coupling stiffness slippage at the interface wellbore stability analysis depressurization method |
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methane hydrate shear/normal coupling stiffness slippage at the interface wellbore stability analysis depressurization method Jung-Tae Kim Ah-Ram Kim Gye-Chun Cho Chul-Whan Kang Joo Yong Lee The Effects of Coupling Stiffness and Slippage of Interface Between the Wellbore and Unconsolidated Sediment on the Stability Analysis of the Wellbore Under Gas Hydrate Production |
topic_facet |
methane hydrate shear/normal coupling stiffness slippage at the interface wellbore stability analysis depressurization method |
description |
Gas hydrates have great potential as future energy resources. Several productivity and stability analyses have been conducted for the Ulleung Basin, and the depressurization method is being considered for production. Under depressurization, ground settlement occurs near the wellbore and axial stress develops. For a safe production test, it is essential to perform a stability analysis for the wellbore and hydrate-bearing sediments. In this study, the development of axial stress on the wellbore was investigated considering the coupling stiffness of the interface between the wellbore and sediment. A coupling stiffness model, which can consider both confining stress and slippage phenomena, was suggested and applied in a numerical simulation. Parametric analyses were conducted to investigate the effects of coupling stiffness and slippage on axial stress development. The results show that shear coupling stiffness has a significant effect on wellbore stability, while normal coupling stiffness has a minor effect. In addition, the maximum axial stress of the well bore has an upper limit depending on the magnitude of the confining stress, and the axial stress converges to this upper limit due to slipping at the interface. The results can be used as fundamental data for the design of wellbore under depressurization-based gas production. |
format |
Text |
author |
Jung-Tae Kim Ah-Ram Kim Gye-Chun Cho Chul-Whan Kang Joo Yong Lee |
author_facet |
Jung-Tae Kim Ah-Ram Kim Gye-Chun Cho Chul-Whan Kang Joo Yong Lee |
author_sort |
Jung-Tae Kim |
title |
The Effects of Coupling Stiffness and Slippage of Interface Between the Wellbore and Unconsolidated Sediment on the Stability Analysis of the Wellbore Under Gas Hydrate Production |
title_short |
The Effects of Coupling Stiffness and Slippage of Interface Between the Wellbore and Unconsolidated Sediment on the Stability Analysis of the Wellbore Under Gas Hydrate Production |
title_full |
The Effects of Coupling Stiffness and Slippage of Interface Between the Wellbore and Unconsolidated Sediment on the Stability Analysis of the Wellbore Under Gas Hydrate Production |
title_fullStr |
The Effects of Coupling Stiffness and Slippage of Interface Between the Wellbore and Unconsolidated Sediment on the Stability Analysis of the Wellbore Under Gas Hydrate Production |
title_full_unstemmed |
The Effects of Coupling Stiffness and Slippage of Interface Between the Wellbore and Unconsolidated Sediment on the Stability Analysis of the Wellbore Under Gas Hydrate Production |
title_sort |
effects of coupling stiffness and slippage of interface between the wellbore and unconsolidated sediment on the stability analysis of the wellbore under gas hydrate production |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2019 |
url |
https://doi.org/10.3390/en12214177 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
Energies Volume 12 Issue 21 Pages: 4177 |
op_relation |
B: Energy and Environment https://dx.doi.org/10.3390/en12214177 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/en12214177 |
container_title |
Energies |
container_volume |
12 |
container_issue |
21 |
container_start_page |
4177 |
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1801379026182340608 |