Timescales and Processes of Methane Hydrate Formation and Breakdown, With Application to Geologic Systems
Gas hydrate is an ice-like form of water and low molecular weight gas stable at temperatures of roughly -10°C to 25°C and pressures of ~3 to 30 MPa in geologic systems. Natural gas hydrates sequester an estimated one sixth of Earth's methane and are found primarily in deepwater marine sediments...
Published in: | Journal of Geophysical Research: Solid Earth |
---|---|
Main Authors: | , |
Language: | unknown |
Published: |
2023
|
Subjects: | |
Online Access: | http://www.osti.gov/servlets/purl/1799775 https://www.osti.gov/biblio/1799775 https://doi.org/10.1029/2018jb016459 |
id |
ftosti:oai:osti.gov:1799775 |
---|---|
record_format |
openpolar |
spelling |
ftosti:oai:osti.gov:1799775 2023-07-30T04:04:06+02:00 Timescales and Processes of Methane Hydrate Formation and Breakdown, With Application to Geologic Systems Ruppel, C. D. Waite, W. F. 2023-02-23 application/pdf http://www.osti.gov/servlets/purl/1799775 https://www.osti.gov/biblio/1799775 https://doi.org/10.1029/2018jb016459 unknown http://www.osti.gov/servlets/purl/1799775 https://www.osti.gov/biblio/1799775 https://doi.org/10.1029/2018jb016459 doi:10.1029/2018jb016459 58 GEOSCIENCES 2023 ftosti https://doi.org/10.1029/2018jb016459 2023-07-11T10:04:31Z Gas hydrate is an ice-like form of water and low molecular weight gas stable at temperatures of roughly -10°C to 25°C and pressures of ~3 to 30 MPa in geologic systems. Natural gas hydrates sequester an estimated one sixth of Earth's methane and are found primarily in deepwater marine sediments on continental margins, but also in permafrost areas and under continental ice sheets. When gas hydrate is removed from its stability field, its breakdown has implications for the global carbon cycle, ocean chemistry, marine geohazards, and interactions between the geosphere and the ocean-atmosphere system. Gas hydrate breakdown can also be artificially driven as a component of studies assessing the resource potential of these deposits. Furthermore, geologic processes and perturbations to the ocean-atmosphere system (e.g., warming temperatures) can cause not only dissociation, but also more widespread dissolution of hydrate or even formation of new hydrate in reservoirs. Linkages between gas hydrate and disparate aspects of Earth's near-surface physical, chemical, and biological systems render an assessment of the rates and processes affecting the persistence of gas hydrate an appropriate Centennial Grand Challenge. This paper reviews the thermodynamic controls on methane hydrate stability and then describes the relative importance of kinetic, mass transfer, and heat transfer processes in the formation and breakdown (dissociation and dissolution) of gas hydrate. Results from numerical modeling, laboratory, and some field studies are used to summarize the rates of hydrate formation and breakdown, followed by an extensive treatment of hydrate dynamics in marine and cryospheric gas hydrate systems. Other/Unknown Material Ice Methane hydrate permafrost SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Journal of Geophysical Research: Solid Earth 125 8 |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
58 GEOSCIENCES |
spellingShingle |
58 GEOSCIENCES Ruppel, C. D. Waite, W. F. Timescales and Processes of Methane Hydrate Formation and Breakdown, With Application to Geologic Systems |
topic_facet |
58 GEOSCIENCES |
description |
Gas hydrate is an ice-like form of water and low molecular weight gas stable at temperatures of roughly -10°C to 25°C and pressures of ~3 to 30 MPa in geologic systems. Natural gas hydrates sequester an estimated one sixth of Earth's methane and are found primarily in deepwater marine sediments on continental margins, but also in permafrost areas and under continental ice sheets. When gas hydrate is removed from its stability field, its breakdown has implications for the global carbon cycle, ocean chemistry, marine geohazards, and interactions between the geosphere and the ocean-atmosphere system. Gas hydrate breakdown can also be artificially driven as a component of studies assessing the resource potential of these deposits. Furthermore, geologic processes and perturbations to the ocean-atmosphere system (e.g., warming temperatures) can cause not only dissociation, but also more widespread dissolution of hydrate or even formation of new hydrate in reservoirs. Linkages between gas hydrate and disparate aspects of Earth's near-surface physical, chemical, and biological systems render an assessment of the rates and processes affecting the persistence of gas hydrate an appropriate Centennial Grand Challenge. This paper reviews the thermodynamic controls on methane hydrate stability and then describes the relative importance of kinetic, mass transfer, and heat transfer processes in the formation and breakdown (dissociation and dissolution) of gas hydrate. Results from numerical modeling, laboratory, and some field studies are used to summarize the rates of hydrate formation and breakdown, followed by an extensive treatment of hydrate dynamics in marine and cryospheric gas hydrate systems. |
author |
Ruppel, C. D. Waite, W. F. |
author_facet |
Ruppel, C. D. Waite, W. F. |
author_sort |
Ruppel, C. D. |
title |
Timescales and Processes of Methane Hydrate Formation and Breakdown, With Application to Geologic Systems |
title_short |
Timescales and Processes of Methane Hydrate Formation and Breakdown, With Application to Geologic Systems |
title_full |
Timescales and Processes of Methane Hydrate Formation and Breakdown, With Application to Geologic Systems |
title_fullStr |
Timescales and Processes of Methane Hydrate Formation and Breakdown, With Application to Geologic Systems |
title_full_unstemmed |
Timescales and Processes of Methane Hydrate Formation and Breakdown, With Application to Geologic Systems |
title_sort |
timescales and processes of methane hydrate formation and breakdown, with application to geologic systems |
publishDate |
2023 |
url |
http://www.osti.gov/servlets/purl/1799775 https://www.osti.gov/biblio/1799775 https://doi.org/10.1029/2018jb016459 |
genre |
Ice Methane hydrate permafrost |
genre_facet |
Ice Methane hydrate permafrost |
op_relation |
http://www.osti.gov/servlets/purl/1799775 https://www.osti.gov/biblio/1799775 https://doi.org/10.1029/2018jb016459 doi:10.1029/2018jb016459 |
op_doi |
https://doi.org/10.1029/2018jb016459 |
container_title |
Journal of Geophysical Research: Solid Earth |
container_volume |
125 |
container_issue |
8 |
_version_ |
1772815277167214592 |