Thermal Conductivity of Frozen Sediments Containing Self-Preserved Pore Gas Hydrates at Atmospheric Pressure: An Experimental Study
The paper presents the results of an experimental thermal conductivity study of frozen artificial and natural gas hydrate-bearing sediments at atmospheric pressure (0.1 MPa). Samples of hydrate-saturated sediments are highly stable and suitable for the determination of their physical properties, inc...
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ftdoajarticles:oai:doaj.org/article:8eadc18a27e847a8bb01c3727eed949d 2023-05-15T16:37:53+02:00 Thermal Conductivity of Frozen Sediments Containing Self-Preserved Pore Gas Hydrates at Atmospheric Pressure: An Experimental Study Evgeny Chuvilin Boris Bukhanov 2019-01-01T00:00:00Z https://doi.org/10.3390/geosciences9020065 https://doaj.org/article/8eadc18a27e847a8bb01c3727eed949d EN eng MDPI AG https://www.mdpi.com/2076-3263/9/2/65 https://doaj.org/toc/2076-3263 2076-3263 doi:10.3390/geosciences9020065 https://doaj.org/article/8eadc18a27e847a8bb01c3727eed949d Geosciences, Vol 9, Iss 2, p 65 (2019) gas hydrate frozen sediment thermal conductivity methane self-preservation needle probe Geology QE1-996.5 article 2019 ftdoajarticles https://doi.org/10.3390/geosciences9020065 2023-01-08T01:26:55Z The paper presents the results of an experimental thermal conductivity study of frozen artificial and natural gas hydrate-bearing sediments at atmospheric pressure (0.1 MPa). Samples of hydrate-saturated sediments are highly stable and suitable for the determination of their physical properties, including thermal conductivity, due to the self-preservation of pore methane hydrate at negative temperatures. It is suggested to measure the thermal conductivity of frozen sediments containing self-preserved pore hydrates by a KD-2 needle probe which causes very little thermal impact on the samples. As shown by the special measurements of reference materials with known thermal conductivities, the values measured with the KD-2 probe are up to 20% underestimated and require the respective correction. Frozen hydrate-bearing sediments differ markedly in thermal conductivity from reference frozen samples of the same composition but free from pore hydrate. The difference depends on the physical properties of the sediments and on changes in their texture and structure associated with the self-preservation effect. Namely, it increases proportionally to the volumetric hydrate content, hydrate saturation, and the percentage of water converted to hydrate. Thermal conductivity is anisotropic in core samples of naturally frozen sediments that enclose visible ice-hydrate lenses and varies with the direction of measurements with respect to the lenses. Thermal conductivity measurements with the suggested method provide a reliable tool for detection of stable and relict gas hydrates in permafrost. Article in Journal/Newspaper Ice Methane hydrate permafrost Directory of Open Access Journals: DOAJ Articles Geosciences 9 2 65 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
gas hydrate frozen sediment thermal conductivity methane self-preservation needle probe Geology QE1-996.5 |
spellingShingle |
gas hydrate frozen sediment thermal conductivity methane self-preservation needle probe Geology QE1-996.5 Evgeny Chuvilin Boris Bukhanov Thermal Conductivity of Frozen Sediments Containing Self-Preserved Pore Gas Hydrates at Atmospheric Pressure: An Experimental Study |
topic_facet |
gas hydrate frozen sediment thermal conductivity methane self-preservation needle probe Geology QE1-996.5 |
description |
The paper presents the results of an experimental thermal conductivity study of frozen artificial and natural gas hydrate-bearing sediments at atmospheric pressure (0.1 MPa). Samples of hydrate-saturated sediments are highly stable and suitable for the determination of their physical properties, including thermal conductivity, due to the self-preservation of pore methane hydrate at negative temperatures. It is suggested to measure the thermal conductivity of frozen sediments containing self-preserved pore hydrates by a KD-2 needle probe which causes very little thermal impact on the samples. As shown by the special measurements of reference materials with known thermal conductivities, the values measured with the KD-2 probe are up to 20% underestimated and require the respective correction. Frozen hydrate-bearing sediments differ markedly in thermal conductivity from reference frozen samples of the same composition but free from pore hydrate. The difference depends on the physical properties of the sediments and on changes in their texture and structure associated with the self-preservation effect. Namely, it increases proportionally to the volumetric hydrate content, hydrate saturation, and the percentage of water converted to hydrate. Thermal conductivity is anisotropic in core samples of naturally frozen sediments that enclose visible ice-hydrate lenses and varies with the direction of measurements with respect to the lenses. Thermal conductivity measurements with the suggested method provide a reliable tool for detection of stable and relict gas hydrates in permafrost. |
format |
Article in Journal/Newspaper |
author |
Evgeny Chuvilin Boris Bukhanov |
author_facet |
Evgeny Chuvilin Boris Bukhanov |
author_sort |
Evgeny Chuvilin |
title |
Thermal Conductivity of Frozen Sediments Containing Self-Preserved Pore Gas Hydrates at Atmospheric Pressure: An Experimental Study |
title_short |
Thermal Conductivity of Frozen Sediments Containing Self-Preserved Pore Gas Hydrates at Atmospheric Pressure: An Experimental Study |
title_full |
Thermal Conductivity of Frozen Sediments Containing Self-Preserved Pore Gas Hydrates at Atmospheric Pressure: An Experimental Study |
title_fullStr |
Thermal Conductivity of Frozen Sediments Containing Self-Preserved Pore Gas Hydrates at Atmospheric Pressure: An Experimental Study |
title_full_unstemmed |
Thermal Conductivity of Frozen Sediments Containing Self-Preserved Pore Gas Hydrates at Atmospheric Pressure: An Experimental Study |
title_sort |
thermal conductivity of frozen sediments containing self-preserved pore gas hydrates at atmospheric pressure: an experimental study |
publisher |
MDPI AG |
publishDate |
2019 |
url |
https://doi.org/10.3390/geosciences9020065 https://doaj.org/article/8eadc18a27e847a8bb01c3727eed949d |
genre |
Ice Methane hydrate permafrost |
genre_facet |
Ice Methane hydrate permafrost |
op_source |
Geosciences, Vol 9, Iss 2, p 65 (2019) |
op_relation |
https://www.mdpi.com/2076-3263/9/2/65 https://doaj.org/toc/2076-3263 2076-3263 doi:10.3390/geosciences9020065 https://doaj.org/article/8eadc18a27e847a8bb01c3727eed949d |
op_doi |
https://doi.org/10.3390/geosciences9020065 |
container_title |
Geosciences |
container_volume |
9 |
container_issue |
2 |
container_start_page |
65 |
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1766028177853906944 |