Integration of triaxial testing and pore-scale visualization of methane hydrate bearing sediments
Understanding mechanical interactions between hydrate and hosting sediments is critical for evaluating formation stability and associated environmental impacts of hydrate-bearing sediments during gas production. While core-scale studies of hydrate-bearing sediments are readily available and some exp...
Published in: | Review of Scientific Instruments |
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American Institute of Physics
2019
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Online Access: | https://oceanrep.geomar.de/id/eprint/48985/ https://oceanrep.geomar.de/id/eprint/48985/1/Seol.pdf https://doi.org/10.1063/1.5125445 |
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ftoceanrep:oai:oceanrep.geomar.de:48985 2023-05-15T17:11:39+02:00 Integration of triaxial testing and pore-scale visualization of methane hydrate bearing sediments Seol, Yongkoo Lei, Liang Choi, Jeong-Hoon Jarvis, Karl Hill, Daniel 2019 text https://oceanrep.geomar.de/id/eprint/48985/ https://oceanrep.geomar.de/id/eprint/48985/1/Seol.pdf https://doi.org/10.1063/1.5125445 en eng American Institute of Physics https://oceanrep.geomar.de/id/eprint/48985/1/Seol.pdf Seol, Y. , Lei, L. , Choi, J. H., Jarvis, K. and Hill, D. (2019) Integration of triaxial testing and pore-scale visualization of methane hydrate bearing sediments. Review of Scientific Instruments, 90 (12). p. 124504. DOI 10.1063/1.5125445 <https://doi.org/10.1063/1.5125445>. doi:10.1063/1.5125445 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2019 ftoceanrep https://doi.org/10.1063/1.5125445 2023-04-07T15:49:25Z Understanding mechanical interactions between hydrate and hosting sediments is critical for evaluating formation stability and associated environmental impacts of hydrate-bearing sediments during gas production. While core-scale studies of hydrate-bearing sediments are readily available and some explanations of observed results rely on pore-scale behavior of hydrate, actual pore-scale observations supporting the larger-scale phenomena are rarely available for hydrate-bearing sediments, especially with methane as guest molecules. The primary reasons for the scarcity include the challenge of developing tools for small-scale testing apparatus and pore-scale visualization capability. We present a testing assembly that combines pore-scale visualization and triaxial test capability of methane hydrate-bearing sediments. This testing assembly allows temperature regulation and independent control of four pressures: influent and effluent pore pressure, confining pressure, and axial pressure. Axial and lateral effective stresses can be applied independently to a 9.5 mm diameter and 19 mm long specimen while the pore pressure and temperature are controlled to maintain the stability of methane hydrate. The testing assembly also includes an X-ray transparent beryllium core holder so that 3D computed tomography scanning can be conducted during the triaxial loading. This testing assembly permits pore-scale exploration of hydrate-sediment interaction in addition to the traditional stress-strain relationship. Exemplary outcomes are presented to demonstrate applications of the testing assembly on geomechanical property estimations of methane-hydrate bearing sediments. Article in Journal/Newspaper Methane hydrate OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Review of Scientific Instruments 90 12 124504 |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Understanding mechanical interactions between hydrate and hosting sediments is critical for evaluating formation stability and associated environmental impacts of hydrate-bearing sediments during gas production. While core-scale studies of hydrate-bearing sediments are readily available and some explanations of observed results rely on pore-scale behavior of hydrate, actual pore-scale observations supporting the larger-scale phenomena are rarely available for hydrate-bearing sediments, especially with methane as guest molecules. The primary reasons for the scarcity include the challenge of developing tools for small-scale testing apparatus and pore-scale visualization capability. We present a testing assembly that combines pore-scale visualization and triaxial test capability of methane hydrate-bearing sediments. This testing assembly allows temperature regulation and independent control of four pressures: influent and effluent pore pressure, confining pressure, and axial pressure. Axial and lateral effective stresses can be applied independently to a 9.5 mm diameter and 19 mm long specimen while the pore pressure and temperature are controlled to maintain the stability of methane hydrate. The testing assembly also includes an X-ray transparent beryllium core holder so that 3D computed tomography scanning can be conducted during the triaxial loading. This testing assembly permits pore-scale exploration of hydrate-sediment interaction in addition to the traditional stress-strain relationship. Exemplary outcomes are presented to demonstrate applications of the testing assembly on geomechanical property estimations of methane-hydrate bearing sediments. |
format |
Article in Journal/Newspaper |
author |
Seol, Yongkoo Lei, Liang Choi, Jeong-Hoon Jarvis, Karl Hill, Daniel |
spellingShingle |
Seol, Yongkoo Lei, Liang Choi, Jeong-Hoon Jarvis, Karl Hill, Daniel Integration of triaxial testing and pore-scale visualization of methane hydrate bearing sediments |
author_facet |
Seol, Yongkoo Lei, Liang Choi, Jeong-Hoon Jarvis, Karl Hill, Daniel |
author_sort |
Seol, Yongkoo |
title |
Integration of triaxial testing and pore-scale visualization of methane hydrate bearing sediments |
title_short |
Integration of triaxial testing and pore-scale visualization of methane hydrate bearing sediments |
title_full |
Integration of triaxial testing and pore-scale visualization of methane hydrate bearing sediments |
title_fullStr |
Integration of triaxial testing and pore-scale visualization of methane hydrate bearing sediments |
title_full_unstemmed |
Integration of triaxial testing and pore-scale visualization of methane hydrate bearing sediments |
title_sort |
integration of triaxial testing and pore-scale visualization of methane hydrate bearing sediments |
publisher |
American Institute of Physics |
publishDate |
2019 |
url |
https://oceanrep.geomar.de/id/eprint/48985/ https://oceanrep.geomar.de/id/eprint/48985/1/Seol.pdf https://doi.org/10.1063/1.5125445 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
https://oceanrep.geomar.de/id/eprint/48985/1/Seol.pdf Seol, Y. , Lei, L. , Choi, J. H., Jarvis, K. and Hill, D. (2019) Integration of triaxial testing and pore-scale visualization of methane hydrate bearing sediments. Review of Scientific Instruments, 90 (12). p. 124504. DOI 10.1063/1.5125445 <https://doi.org/10.1063/1.5125445>. doi:10.1063/1.5125445 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1063/1.5125445 |
container_title |
Review of Scientific Instruments |
container_volume |
90 |
container_issue |
12 |
container_start_page |
124504 |
_version_ |
1766068423830274048 |