Consolidation of gas hydrate-bearing sediments with hydrate dissociation
Consolidation of gas hydrate-bearing sediments with hydrate dissociation
Quantifying sediment deformation induced by depressurization of gas hydrate reservoirs and hydrate dissociation is crucial for the safe and economic production of natural gas from hydrates, and for understanding hydrate-related natural geological risks. This study uses our recently developed fully-coupled Thermo-Hydro-Mechanical formulation for gas hydrate-bearing geological systems implemented in the 3D Code_Bright simulator. First, the model formulation is briefly presented. Then, the model is applied to reproduce published experimental consolidation tests performed on hydrate-bearing pressure-core sediments recovered from the Krishna-Godavari Basin (offshore of India) during the India National Gas Hydrate Project Expedition 02 (NGHP02). The numerical simulation reproduces the tests in which the sediment is loaded and unloaded prior and after hydrate dissociates via depressurization at constant effective stress. Our results successfully capture sediment collapse when hydrate dissociates at a mean effective stress above that of the host sediment consolidation curve. The mechanical constitutive model Hydrate-CASM also allows reproducing the experimentally observed changes in sediment swelling index with changes in hydrate saturation.
De La Fuente, Maria
aa94b7e3-cc30-45d9-85df-fddccc85b2d6
Vaunat, Jean
c8939ecb-3c86-4cf1-9286-cd97acdee002
Marín-Moreno, Hector
e466cafd-bd5c-47a1-8522-e6938e7086a4
De La Fuente, Maria
aa94b7e3-cc30-45d9-85df-fddccc85b2d6
Vaunat, Jean
c8939ecb-3c86-4cf1-9286-cd97acdee002
Marín-Moreno, Hector
e466cafd-bd5c-47a1-8522-e6938e7086a4
De La Fuente, Maria, Vaunat, Jean and Marín-Moreno, Hector
(2020)
Consolidation of gas hydrate-bearing sediments with hydrate dissociation.
McCartney, J.S. and Tomac, I.
(eds.)
In E3S Web of Conferences: 2nd International Conference on Energy Geotechnics (ICEGT 2020).
vol. 205,
EDP Sciences.
7 pp
.
(doi:10.1051/e3sconf/202020511007).
Record type:
Conference or Workshop Item
(Paper)
Abstract
Quantifying sediment deformation induced by depressurization of gas hydrate reservoirs and hydrate dissociation is crucial for the safe and economic production of natural gas from hydrates, and for understanding hydrate-related natural geological risks. This study uses our recently developed fully-coupled Thermo-Hydro-Mechanical formulation for gas hydrate-bearing geological systems implemented in the 3D Code_Bright simulator. First, the model formulation is briefly presented. Then, the model is applied to reproduce published experimental consolidation tests performed on hydrate-bearing pressure-core sediments recovered from the Krishna-Godavari Basin (offshore of India) during the India National Gas Hydrate Project Expedition 02 (NGHP02). The numerical simulation reproduces the tests in which the sediment is loaded and unloaded prior and after hydrate dissociates via depressurization at constant effective stress. Our results successfully capture sediment collapse when hydrate dissociates at a mean effective stress above that of the host sediment consolidation curve. The mechanical constitutive model Hydrate-CASM also allows reproducing the experimentally observed changes in sediment swelling index with changes in hydrate saturation.
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e3sconf_icegt2020_11007
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e-pub ahead of print date: 18 November 2020
Venue - Dates:
2nd International Conference on Energy Geotechnics (ICEGT 2020), , La Jolla, United States, 2020-09-20 - 2020-09-23
Identifiers
Local EPrints ID: 483982
URI: http://eprints.soton.ac.uk/id/eprint/483982
PURE UUID: a2270c47-cca0-4f59-99e3-7aeda993d266
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Date deposited: 08 Nov 2023 18:12
Last modified: 10 Apr 2024 02:11
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Contributors
Author:
Maria De La Fuente
Author:
Jean Vaunat
Author:
Hector Marín-Moreno
Editor:
J.S. McCartney
Editor:
I. Tomac
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