Effects of sediment characteristics on gas hydrate accumulation; continental margins and permafrost; model results from 2018
The occurrence of methane hydrate in marine reservoirs often correlates with the physical properties of the host sediments. High hydrate saturations (greater than 60% of the pore volume) found in association with coarser-grained strata have been attributed to both enhanced advective transport throug...
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2021
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dataone:doi:10.18739/A2GQ6R34D 2024-06-03T18:46:58+00:00 Effects of sediment characteristics on gas hydrate accumulation; continental margins and permafrost; model results from 2018 Alan Rempel No sampling site. This is a modeling study and the dataset consists of Matlab scripts. ENVELOPE(-80.0,-79.0,31.0,31.0) BEGINDATE: 2018-01-01T00:00:00Z ENDDATE: 2018-01-01T00:00:00Z 2021-01-01T00:00:00Z https://doi.org/10.18739/A2GQ6R34D unknown Arctic Data Center gas hydrate pore-scale equilibrium controls Dataset 2021 dataone:urn:node:ARCTIC https://doi.org/10.18739/A2GQ6R34D 2024-06-03T18:17:19Z The occurrence of methane hydrate in marine reservoirs often correlates with the physical properties of the host sediments. High hydrate saturations (greater than 60% of the pore volume) found in association with coarser-grained strata have been attributed to both enhanced advective transport through more permeable sediment layers and to perturbations in phase equilibrium related to pore-space geometry that results in increased diffusive transport. To assess the relative importance of these mechanism in controlling hydrate occurrence, we developed a 1D (1-dimensional) model for hydrate growth along dipping, coarse-grained layers embedded in a fine-grained sediment package. We explicitly account for pore-size effects on methane solubility and permeability-driven variations in fluid flux. We show how the vertical distribution of hydrate varies in response to changes in grain size and rates of fluid advection, sedimentation, and in situ methane production. As an example, we use our model to simulate centimeter-scale variations in hydrate saturation observed at Walker Ridge Block 313, Hole H in the Gulf of Mexico. The model m-files and parameter text files are contained in this dataset. The results from this study are published by Brandon P. van der Beek and Alan W. Rempel as “On the importance of advective versus diffusive transport in controlling the distribution of methane hydrate in heterogeneous marine sediments”, doi: 10.1029/2017jb015298, Journal of Geophysical Research, 2018. Dataset Methane hydrate permafrost Arctic Data Center (via DataONE) Walker Ridge ENVELOPE(168.367,168.367,-72.567,-72.567) ENVELOPE(-80.0,-79.0,31.0,31.0) |
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Open Polar |
collection |
Arctic Data Center (via DataONE) |
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dataone:urn:node:ARCTIC |
language |
unknown |
topic |
gas hydrate pore-scale equilibrium controls |
spellingShingle |
gas hydrate pore-scale equilibrium controls Alan Rempel Effects of sediment characteristics on gas hydrate accumulation; continental margins and permafrost; model results from 2018 |
topic_facet |
gas hydrate pore-scale equilibrium controls |
description |
The occurrence of methane hydrate in marine reservoirs often correlates with the physical properties of the host sediments. High hydrate saturations (greater than 60% of the pore volume) found in association with coarser-grained strata have been attributed to both enhanced advective transport through more permeable sediment layers and to perturbations in phase equilibrium related to pore-space geometry that results in increased diffusive transport. To assess the relative importance of these mechanism in controlling hydrate occurrence, we developed a 1D (1-dimensional) model for hydrate growth along dipping, coarse-grained layers embedded in a fine-grained sediment package. We explicitly account for pore-size effects on methane solubility and permeability-driven variations in fluid flux. We show how the vertical distribution of hydrate varies in response to changes in grain size and rates of fluid advection, sedimentation, and in situ methane production. As an example, we use our model to simulate centimeter-scale variations in hydrate saturation observed at Walker Ridge Block 313, Hole H in the Gulf of Mexico. The model m-files and parameter text files are contained in this dataset. The results from this study are published by Brandon P. van der Beek and Alan W. Rempel as “On the importance of advective versus diffusive transport in controlling the distribution of methane hydrate in heterogeneous marine sediments”, doi: 10.1029/2017jb015298, Journal of Geophysical Research, 2018. |
format |
Dataset |
author |
Alan Rempel |
author_facet |
Alan Rempel |
author_sort |
Alan Rempel |
title |
Effects of sediment characteristics on gas hydrate accumulation; continental margins and permafrost; model results from 2018 |
title_short |
Effects of sediment characteristics on gas hydrate accumulation; continental margins and permafrost; model results from 2018 |
title_full |
Effects of sediment characteristics on gas hydrate accumulation; continental margins and permafrost; model results from 2018 |
title_fullStr |
Effects of sediment characteristics on gas hydrate accumulation; continental margins and permafrost; model results from 2018 |
title_full_unstemmed |
Effects of sediment characteristics on gas hydrate accumulation; continental margins and permafrost; model results from 2018 |
title_sort |
effects of sediment characteristics on gas hydrate accumulation; continental margins and permafrost; model results from 2018 |
publisher |
Arctic Data Center |
publishDate |
2021 |
url |
https://doi.org/10.18739/A2GQ6R34D |
op_coverage |
No sampling site. This is a modeling study and the dataset consists of Matlab scripts. ENVELOPE(-80.0,-79.0,31.0,31.0) BEGINDATE: 2018-01-01T00:00:00Z ENDDATE: 2018-01-01T00:00:00Z |
long_lat |
ENVELOPE(168.367,168.367,-72.567,-72.567) ENVELOPE(-80.0,-79.0,31.0,31.0) |
geographic |
Walker Ridge |
geographic_facet |
Walker Ridge |
genre |
Methane hydrate permafrost |
genre_facet |
Methane hydrate permafrost |
op_doi |
https://doi.org/10.18739/A2GQ6R34D |
_version_ |
1800873918073929728 |