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dc.contributor.author
Quiroga, Gabriel E.
dc.contributor.author
Rubino, Jorge German
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dc.contributor.author
Solazzi, Santiago Gabriel
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dc.contributor.author
Barbosa, Nicolás D.
dc.contributor.author
Favino, Marco
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dc.contributor.author
Holliger, Klaus
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dc.date.available
2024-04-09T10:18:22Z
dc.date.issued
2023-09
dc.identifier.citation
Quiroga, Gabriel E.; Rubino, Jorge German; Solazzi, Santiago Gabriel; Barbosa, Nicolás D.; Favino, Marco; et al.; Seismic signatures of partial steam saturation in fractured geothermal reservoirs: Insights from poroelasticity; Society of Exploration Geophysicists; Geophysics; 88; 5; 9-2023; 1-68
dc.identifier.issn
0016-8033
dc.identifier.uri
http://hdl.handle.net/11336/232446
dc.description.abstract
Detecting the presence of gaseous formation fluids, estimatingthe respective volumes, and characterizing their spatial distributionare important for a wide range of applications, notably forgeothermal energy production. The ability to obtain such informationfrom remote geophysical measurements constitutes afundamental challenge, which needs to be overcome to addressa wide range of problems, such as the estimation of the reservoirtemperature and pressure conditions. With these motivations, wecompute the body wave velocities of a fractured granitic geothermalreservoir formation with varying quantities of steam toanalyze the seismic signatures in a partial saturation context.We use a poroelastic upscaling approach that accounts for mesoscalefluid pressure diffusion (FPD) effects induced by the seismicstrain field, and, thus, describes the governing physicalprocessesmore accurately than standard representations. Changesin seismic velocities due to steam saturation are compared with changes associated with fracture density variations, as both areplausible results of pressure changes in geothermal reservoirs.We find that steam saturation has a significant impact on P-wavevelocities while affecting S-wave velocities to a significantlylesser extent. This contrasting behavior allows us to discriminatebetween fracture density and steam saturation changes by meansof P- and S-wave velocity ratio analyses. To evaluate the potentialof seismic methods to provide this information, a canonical geothermalreservoir model is used to compute the Rayleigh wavevelocity dispersion and seismic reflection amplitude variationwith angle (AVA) curves. These studies reveal that AVA analysesallow differentiating changes in fracture density from changesin steam saturation. We also note that the Rayleigh-wave-basedtechniques are much less sensitive to steam content changes thanto fracture density changes. Comparisons with elastic approachesindicate that including FPD effects through the use of a poroelasticmodel is crucial for the reliable detection and characterizationof steam in fractured geothermal reservoirs.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Society of Exploration Geophysicists
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
AVO/AVA
dc.subject
GEOTHERMAL
dc.subject
INTERPRETATION
dc.subject
MODELING
dc.subject
RAYLEIGH WAVE
dc.subject.classification
Geoquímica y Geofísica
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Seismic signatures of partial steam saturation in fractured geothermal reservoirs: Insights from poroelasticity
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-04-08T11:10:58Z
dc.identifier.eissn
1942-2156
dc.journal.volume
88
dc.journal.number
5
dc.journal.pagination
1-68
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Quiroga, Gabriel E.. Universite de Lausanne; Suiza
dc.description.fil
Fil: Rubino, Jorge German. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
dc.description.fil
Fil: Solazzi, Santiago Gabriel. Universite de Lausanne; Suiza. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Barbosa, Nicolás D.. Universite de Lausanne; Suiza
dc.description.fil
Fil: Favino, Marco. Universite de Lausanne; Suiza
dc.description.fil
Fil: Holliger, Klaus. Universite de Lausanne; Suiza
dc.journal.title
Geophysics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://library.seg.org/doi/10.1190/geo2022-0635.1
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1190/geo2022-0635.1
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