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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craippubl:10.1063/1.5125445 2024-05-19T07:43:59+00:00 Integration of triaxial testing and pore-scale visualization of methane hydrate bearing sediments Seol, Yongkoo Lei, Liang Choi, Jeong-Hoon Jarvis, Karl Hill, Daniel National Energy Technology Laboratory 2019 http://dx.doi.org/10.1063/1.5125445 http://aip.scitation.org/doi/am-pdf/10.1063/1.5125445 https://pubs.aip.org/aip/rsi/article-pdf/doi/10.1063/1.5125445/15705525/124504_1_online.pdf en eng AIP Publishing https://publishing.aip.org/authors/rights-and-permissions Review of Scientific Instruments volume 90, issue 12 ISSN 0034-6748 1089-7623 journal-article 2019 craippubl https://doi.org/10.1063/1.5125445 2024-05-02T06:42:53Z 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 AIP Publishing Review of Scientific Instruments 90 12 124504 |
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AIP Publishing |
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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. |
author2 |
National Energy Technology Laboratory |
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 |
AIP Publishing |
publishDate |
2019 |
url |
http://dx.doi.org/10.1063/1.5125445 http://aip.scitation.org/doi/am-pdf/10.1063/1.5125445 https://pubs.aip.org/aip/rsi/article-pdf/doi/10.1063/1.5125445/15705525/124504_1_online.pdf |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
Review of Scientific Instruments volume 90, issue 12 ISSN 0034-6748 1089-7623 |
op_rights |
https://publishing.aip.org/authors/rights-and-permissions |
op_doi |
https://doi.org/10.1063/1.5125445 |
container_title |
Review of Scientific Instruments |
container_volume |
90 |
container_issue |
12 |
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124504 |
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1799483750502891520 |