Presence and consequences of coexisting methane gas with hydrate under two phase water-hydrate stability conditions
Methane hydrate saturation estimates from remote geophysical data and borehole logs are needed to assess the role of hydrates in climate change, continental slope stability, and energy resource potential. Here, we present laboratory hydrate formation/dissociation experiments in which we determined t...
Published in: | Journal of Geophysical Research: Solid Earth |
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ftnerc:oai:nora.nerc.ac.uk:520099 2023-05-15T17:11:48+02:00 Presence and consequences of coexisting methane gas with hydrate under two phase water-hydrate stability conditions Sahoo, Sourav K. Marin Moreno, Héctor North, Laurence J. Falcon Suarez, Ismael Madhusudhan, Bangalore N. Best, Angus I. Minshull, Tim A. 2018 text http://nora.nerc.ac.uk/id/eprint/520099/ https://nora.nerc.ac.uk/id/eprint/520099/1/coexisting_manuscript_jgr_rev4_clean.pdf https://doi.org/10.1029/2018JB015598 en eng https://nora.nerc.ac.uk/id/eprint/520099/1/coexisting_manuscript_jgr_rev4_clean.pdf Sahoo, Sourav K. orcid:0000-0001-9644-8878 Marin Moreno, Héctor orcid:0000-0002-3412-1359 North, Laurence J.; Falcon Suarez, Ismael orcid:0000-0001-8576-5165 Madhusudhan, Bangalore N.; Best, Angus I. orcid:0000-0001-9558-4261 Minshull, Tim A. 2018 Presence and consequences of coexisting methane gas with hydrate under two phase water-hydrate stability conditions. Journal of Geophysical Research: Solid Earth, 123 (5). 3377-3390. https://doi.org/10.1029/2018JB015598 <https://doi.org/10.1029/2018JB015598> cc_by_4 CC-BY Publication - Article PeerReviewed 2018 ftnerc https://doi.org/10.1029/2018JB015598 2023-02-04T19:46:36Z Methane hydrate saturation estimates from remote geophysical data and borehole logs are needed to assess the role of hydrates in climate change, continental slope stability, and energy resource potential. Here, we present laboratory hydrate formation/dissociation experiments in which we determined the methane hydrate content independently from pore pressure and temperature, and from electrical resistivity. Using these laboratory experiments, we demonstrate that hydrate formation does not take up all the methane gas or water even if the system is under two phase water‐hydrate stability conditions and gas is well distributed in the sample. The experiment started with methane gas and water saturations of 16.5% and 83.5% respectively; during the experiment, hydrate saturation proceeded up to 26% along with 12% gas and 62% water remaining in the system. The co‐existence of hydrate and gas is one possible explanation for discrepancies between estimates of hydrate saturation from electrical and acoustic methods. We suggest that an important mechanism for this co‐existence is the formation of a hydrate film enveloping methane gas bubbles, trapping the remaining gas inside. Article in Journal/Newspaper Methane hydrate Natural Environment Research Council: NERC Open Research Archive Journal of Geophysical Research: Solid Earth 123 5 3377 3390 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
English |
description |
Methane hydrate saturation estimates from remote geophysical data and borehole logs are needed to assess the role of hydrates in climate change, continental slope stability, and energy resource potential. Here, we present laboratory hydrate formation/dissociation experiments in which we determined the methane hydrate content independently from pore pressure and temperature, and from electrical resistivity. Using these laboratory experiments, we demonstrate that hydrate formation does not take up all the methane gas or water even if the system is under two phase water‐hydrate stability conditions and gas is well distributed in the sample. The experiment started with methane gas and water saturations of 16.5% and 83.5% respectively; during the experiment, hydrate saturation proceeded up to 26% along with 12% gas and 62% water remaining in the system. The co‐existence of hydrate and gas is one possible explanation for discrepancies between estimates of hydrate saturation from electrical and acoustic methods. We suggest that an important mechanism for this co‐existence is the formation of a hydrate film enveloping methane gas bubbles, trapping the remaining gas inside. |
format |
Article in Journal/Newspaper |
author |
Sahoo, Sourav K. Marin Moreno, Héctor North, Laurence J. Falcon Suarez, Ismael Madhusudhan, Bangalore N. Best, Angus I. Minshull, Tim A. |
spellingShingle |
Sahoo, Sourav K. Marin Moreno, Héctor North, Laurence J. Falcon Suarez, Ismael Madhusudhan, Bangalore N. Best, Angus I. Minshull, Tim A. Presence and consequences of coexisting methane gas with hydrate under two phase water-hydrate stability conditions |
author_facet |
Sahoo, Sourav K. Marin Moreno, Héctor North, Laurence J. Falcon Suarez, Ismael Madhusudhan, Bangalore N. Best, Angus I. Minshull, Tim A. |
author_sort |
Sahoo, Sourav K. |
title |
Presence and consequences of coexisting methane gas with hydrate under two phase water-hydrate stability conditions |
title_short |
Presence and consequences of coexisting methane gas with hydrate under two phase water-hydrate stability conditions |
title_full |
Presence and consequences of coexisting methane gas with hydrate under two phase water-hydrate stability conditions |
title_fullStr |
Presence and consequences of coexisting methane gas with hydrate under two phase water-hydrate stability conditions |
title_full_unstemmed |
Presence and consequences of coexisting methane gas with hydrate under two phase water-hydrate stability conditions |
title_sort |
presence and consequences of coexisting methane gas with hydrate under two phase water-hydrate stability conditions |
publishDate |
2018 |
url |
http://nora.nerc.ac.uk/id/eprint/520099/ https://nora.nerc.ac.uk/id/eprint/520099/1/coexisting_manuscript_jgr_rev4_clean.pdf https://doi.org/10.1029/2018JB015598 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
https://nora.nerc.ac.uk/id/eprint/520099/1/coexisting_manuscript_jgr_rev4_clean.pdf Sahoo, Sourav K. orcid:0000-0001-9644-8878 Marin Moreno, Héctor orcid:0000-0002-3412-1359 North, Laurence J.; Falcon Suarez, Ismael orcid:0000-0001-8576-5165 Madhusudhan, Bangalore N.; Best, Angus I. orcid:0000-0001-9558-4261 Minshull, Tim A. 2018 Presence and consequences of coexisting methane gas with hydrate under two phase water-hydrate stability conditions. Journal of Geophysical Research: Solid Earth, 123 (5). 3377-3390. https://doi.org/10.1029/2018JB015598 <https://doi.org/10.1029/2018JB015598> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2018JB015598 |
container_title |
Journal of Geophysical Research: Solid Earth |
container_volume |
123 |
container_issue |
5 |
container_start_page |
3377 |
op_container_end_page |
3390 |
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1766068567580606464 |