Dynamic in-situ imaging of methane hydrate formation and self-preservation in porous media
Here we present the results of dynamic in-situ 3D X-ray imaging of methane hydrates microstructure during methane hydrate formation and dissociation in sand samples. Short scanning times and high resolution provided by synchrotron X-rays allowed for better understanding of water movement and differe...
Published in: | Marine and Petroleum Geology |
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Online Access: | http://www.osti.gov/servlets/purl/1669113 https://www.osti.gov/biblio/1669113 https://doi.org/10.1016/j.marpetgeo.2020.104234 |
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ftosti:oai:osti.gov:1669113 2023-07-30T04:04:54+02:00 Dynamic in-situ imaging of methane hydrate formation and self-preservation in porous media Nikitin, Viktor V. Dugarov, Geser A. Duchkov, Anton A. Fokin, Mikhail I. Drobchik, Arkady N. Shevchenko, Pavel D. De Carlo, Francesco Mokso, Rajmund 2021-10-29 application/pdf http://www.osti.gov/servlets/purl/1669113 https://www.osti.gov/biblio/1669113 https://doi.org/10.1016/j.marpetgeo.2020.104234 unknown http://www.osti.gov/servlets/purl/1669113 https://www.osti.gov/biblio/1669113 https://doi.org/10.1016/j.marpetgeo.2020.104234 doi:10.1016/j.marpetgeo.2020.104234 58 GEOSCIENCES 2021 ftosti https://doi.org/10.1016/j.marpetgeo.2020.104234 2023-07-11T09:47:52Z Here we present the results of dynamic in-situ 3D X-ray imaging of methane hydrates microstructure during methane hydrate formation and dissociation in sand samples. Short scanning times and high resolution provided by synchrotron X-rays allowed for better understanding of water movement and different types of gas-hydrate formation. Complementing previous observations, we conclude that the process of gas-hydrate formation is accompanied by the water movements caused by cryogenic water suction that happens in sequences of short fast movements with longer equilibrium states in between (when the water is immobile). Based on the 3D microstructure we identified two distinct types of gas-hydrate formation: (i) into the gas pockets and (ii) inside water volumes. For both mechanisms we do not see problems in gas or water supply to support the gas-hydrate formation. The rate of dissociation in the self-preservation mode (pressure drop at negative temperatures) appears to be different for these two types of gas hydrates. This means that the history of the gas-hydrate formation may influence its behaviour at the dissociation stage (e.g. gas-hydrate production). Other/Unknown Material Methane hydrate SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Marine and Petroleum Geology 115 104234 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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58 GEOSCIENCES |
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58 GEOSCIENCES Nikitin, Viktor V. Dugarov, Geser A. Duchkov, Anton A. Fokin, Mikhail I. Drobchik, Arkady N. Shevchenko, Pavel D. De Carlo, Francesco Mokso, Rajmund Dynamic in-situ imaging of methane hydrate formation and self-preservation in porous media |
topic_facet |
58 GEOSCIENCES |
description |
Here we present the results of dynamic in-situ 3D X-ray imaging of methane hydrates microstructure during methane hydrate formation and dissociation in sand samples. Short scanning times and high resolution provided by synchrotron X-rays allowed for better understanding of water movement and different types of gas-hydrate formation. Complementing previous observations, we conclude that the process of gas-hydrate formation is accompanied by the water movements caused by cryogenic water suction that happens in sequences of short fast movements with longer equilibrium states in between (when the water is immobile). Based on the 3D microstructure we identified two distinct types of gas-hydrate formation: (i) into the gas pockets and (ii) inside water volumes. For both mechanisms we do not see problems in gas or water supply to support the gas-hydrate formation. The rate of dissociation in the self-preservation mode (pressure drop at negative temperatures) appears to be different for these two types of gas hydrates. This means that the history of the gas-hydrate formation may influence its behaviour at the dissociation stage (e.g. gas-hydrate production). |
author |
Nikitin, Viktor V. Dugarov, Geser A. Duchkov, Anton A. Fokin, Mikhail I. Drobchik, Arkady N. Shevchenko, Pavel D. De Carlo, Francesco Mokso, Rajmund |
author_facet |
Nikitin, Viktor V. Dugarov, Geser A. Duchkov, Anton A. Fokin, Mikhail I. Drobchik, Arkady N. Shevchenko, Pavel D. De Carlo, Francesco Mokso, Rajmund |
author_sort |
Nikitin, Viktor V. |
title |
Dynamic in-situ imaging of methane hydrate formation and self-preservation in porous media |
title_short |
Dynamic in-situ imaging of methane hydrate formation and self-preservation in porous media |
title_full |
Dynamic in-situ imaging of methane hydrate formation and self-preservation in porous media |
title_fullStr |
Dynamic in-situ imaging of methane hydrate formation and self-preservation in porous media |
title_full_unstemmed |
Dynamic in-situ imaging of methane hydrate formation and self-preservation in porous media |
title_sort |
dynamic in-situ imaging of methane hydrate formation and self-preservation in porous media |
publishDate |
2021 |
url |
http://www.osti.gov/servlets/purl/1669113 https://www.osti.gov/biblio/1669113 https://doi.org/10.1016/j.marpetgeo.2020.104234 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
http://www.osti.gov/servlets/purl/1669113 https://www.osti.gov/biblio/1669113 https://doi.org/10.1016/j.marpetgeo.2020.104234 doi:10.1016/j.marpetgeo.2020.104234 |
op_doi |
https://doi.org/10.1016/j.marpetgeo.2020.104234 |
container_title |
Marine and Petroleum Geology |
container_volume |
115 |
container_start_page |
104234 |
_version_ |
1772816538254966784 |