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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ftdatacite:10.18739/a2nv99c17 2023-05-15T17:11:53+02:00 Effects of sediment characteristics on gas hydrate accumulation; continental margins and permafrost; model results from 2018 Rempel, Alan 2021 text/xml https://dx.doi.org/10.18739/a2nv99c17 https://arcticdata.io/catalog/view/doi:10.18739/A2NV99C17 en eng NSF Arctic Data Center gas hydrate pore-scale equilibrium controls Dataset dataset 2021 ftdatacite https://doi.org/10.18739/a2nv99c17 2022-04-01T18:09:28Z 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 DataCite Metadata Store (German National Library of Science and Technology) Walker Ridge ENVELOPE(168.367,168.367,-72.567,-72.567) |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
gas hydrate pore-scale equilibrium controls |
spellingShingle |
gas hydrate pore-scale equilibrium controls Rempel, Alan 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 |
Rempel, Alan |
author_facet |
Rempel, Alan |
author_sort |
Rempel, Alan |
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 |
NSF Arctic Data Center |
publishDate |
2021 |
url |
https://dx.doi.org/10.18739/a2nv99c17 https://arcticdata.io/catalog/view/doi:10.18739/A2NV99C17 |
long_lat |
ENVELOPE(168.367,168.367,-72.567,-72.567) |
geographic |
Walker Ridge |
geographic_facet |
Walker Ridge |
genre |
Methane hydrate permafrost |
genre_facet |
Methane hydrate permafrost |
op_doi |
https://doi.org/10.18739/a2nv99c17 |
_version_ |
1766068641333248000 |