Effective viscoelastic representation of gas-hydrate bearing sediments from finite-element harmonic experiments

Autores
Santos, Juan E.; Gauzellino, Patricia Mercedes; Carcione, José M.; Ba, Jing
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present a novel numerical upscaling technique for modeling the wave response of gas-hydrate bearing sediments composed of a rock frame, gas-hydrate and water, where the hydrate consists of ice-like lattice of water molecules with methane trapped inside. These sediments are highly heterogeneous at mesoscopic scales, much smaller than the wavelength but much larger than the pore size, inducing substantial seismic wave attenuation and dispersion due to mode conversions. The proposed numerical upscaling procedure simulates the wave-induced fluid-flow loss mechanism by computing an average effective viscoelastic medium having the same behavior of the original sediment. The method determines the complex stiffness coefficients associated with the viscoelastic medium by solving numerically boundary value problems formulated in the space-frequency domain, representing compressibility and shear experiments. The procedure is applied to composite media with regions of different amounts of hydrate with patchy or periodic-layer distributions, which define an anisotropic effective viscoelastic medium, respectively. The examples demonstrate that variations in hydrate content induce strong attenuation and dispersion effects on seismic waves due to the mesoscopic loss mechanism.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Geofísica
Gas-hydrate sediments
Finite elements
Wave-induced fluid flow attenuation
Seismic velocity
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/144140
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/144140
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Effective viscoelastic representation of gas-hydrate bearing sediments from finite-element harmonic experimentsSantos, Juan E.Gauzellino, Patricia MercedesCarcione, José M.Ba, JingGeofísicaGas-hydrate sedimentsFinite elementsWave-induced fluid flow attenuationSeismic velocityWe present a novel numerical upscaling technique for modeling the wave response of gas-hydrate bearing sediments composed of a rock frame, gas-hydrate and water, where the hydrate consists of ice-like lattice of water molecules with methane trapped inside. These sediments are highly heterogeneous at mesoscopic scales, much smaller than the wavelength but much larger than the pore size, inducing substantial seismic wave attenuation and dispersion due to mode conversions. The proposed numerical upscaling procedure simulates the wave-induced fluid-flow loss mechanism by computing an average effective viscoelastic medium having the same behavior of the original sediment. The method determines the complex stiffness coefficients associated with the viscoelastic medium by solving numerically boundary value problems formulated in the space-frequency domain, representing compressibility and shear experiments. The procedure is applied to composite media with regions of different amounts of hydrate with patchy or periodic-layer distributions, which define an anisotropic effective viscoelastic medium, respectively. The examples demonstrate that variations in hydrate content induce strong attenuation and dispersion effects on seismic waves due to the mesoscopic loss mechanism.Facultad de Ciencias Astronómicas y Geofísicas2021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/144140enginfo:eu-repo/semantics/altIdentifier/issn/1420-0597info:eu-repo/semantics/altIdentifier/issn/1573-1499info:eu-repo/semantics/altIdentifier/doi/10.1007/s10596-021-10077-8info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:32:26Zoai:sedici.unlp.edu.ar:10915/144140Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:32:27.055SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Effective viscoelastic representation of gas-hydrate bearing sediments from finite-element harmonic experiments
title Effective viscoelastic representation of gas-hydrate bearing sediments from finite-element harmonic experiments
spellingShingle Effective viscoelastic representation of gas-hydrate bearing sediments from finite-element harmonic experiments
Santos, Juan E.
Geofísica
Gas-hydrate sediments
Finite elements
Wave-induced fluid flow attenuation
Seismic velocity
title_short Effective viscoelastic representation of gas-hydrate bearing sediments from finite-element harmonic experiments
title_full Effective viscoelastic representation of gas-hydrate bearing sediments from finite-element harmonic experiments
title_fullStr Effective viscoelastic representation of gas-hydrate bearing sediments from finite-element harmonic experiments
title_full_unstemmed Effective viscoelastic representation of gas-hydrate bearing sediments from finite-element harmonic experiments
title_sort Effective viscoelastic representation of gas-hydrate bearing sediments from finite-element harmonic experiments
dc.creator.none.fl_str_mv Santos, Juan E.
Gauzellino, Patricia Mercedes
Carcione, José M.
Ba, Jing
author Santos, Juan E.
author_facet Santos, Juan E.
Gauzellino, Patricia Mercedes
Carcione, José M.
Ba, Jing
author_role author
author2 Gauzellino, Patricia Mercedes
Carcione, José M.
Ba, Jing
author2_role author
author
author
dc.subject.none.fl_str_mv Geofísica
Gas-hydrate sediments
Finite elements
Wave-induced fluid flow attenuation
Seismic velocity
topic Geofísica
Gas-hydrate sediments
Finite elements
Wave-induced fluid flow attenuation
Seismic velocity
dc.description.none.fl_txt_mv We present a novel numerical upscaling technique for modeling the wave response of gas-hydrate bearing sediments composed of a rock frame, gas-hydrate and water, where the hydrate consists of ice-like lattice of water molecules with methane trapped inside. These sediments are highly heterogeneous at mesoscopic scales, much smaller than the wavelength but much larger than the pore size, inducing substantial seismic wave attenuation and dispersion due to mode conversions. The proposed numerical upscaling procedure simulates the wave-induced fluid-flow loss mechanism by computing an average effective viscoelastic medium having the same behavior of the original sediment. The method determines the complex stiffness coefficients associated with the viscoelastic medium by solving numerically boundary value problems formulated in the space-frequency domain, representing compressibility and shear experiments. The procedure is applied to composite media with regions of different amounts of hydrate with patchy or periodic-layer distributions, which define an anisotropic effective viscoelastic medium, respectively. The examples demonstrate that variations in hydrate content induce strong attenuation and dispersion effects on seismic waves due to the mesoscopic loss mechanism.
Facultad de Ciencias Astronómicas y Geofísicas
description We present a novel numerical upscaling technique for modeling the wave response of gas-hydrate bearing sediments composed of a rock frame, gas-hydrate and water, where the hydrate consists of ice-like lattice of water molecules with methane trapped inside. These sediments are highly heterogeneous at mesoscopic scales, much smaller than the wavelength but much larger than the pore size, inducing substantial seismic wave attenuation and dispersion due to mode conversions. The proposed numerical upscaling procedure simulates the wave-induced fluid-flow loss mechanism by computing an average effective viscoelastic medium having the same behavior of the original sediment. The method determines the complex stiffness coefficients associated with the viscoelastic medium by solving numerically boundary value problems formulated in the space-frequency domain, representing compressibility and shear experiments. The procedure is applied to composite media with regions of different amounts of hydrate with patchy or periodic-layer distributions, which define an anisotropic effective viscoelastic medium, respectively. The examples demonstrate that variations in hydrate content induce strong attenuation and dispersion effects on seismic waves due to the mesoscopic loss mechanism.
publishDate 2021
dc.date.none.fl_str_mv 2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/144140
url http://sedici.unlp.edu.ar/handle/10915/144140
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1420-0597
info:eu-repo/semantics/altIdentifier/issn/1573-1499
info:eu-repo/semantics/altIdentifier/doi/10.1007/s10596-021-10077-8
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.070432

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