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dc.contributor.author
Caspari, Eva
dc.contributor.author
Novikov, Mikhail
dc.contributor.author
Lisitsa, Vadim
dc.contributor.author
Barbosa, Nicolas Daniel
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dc.contributor.author
Quintal, Beatriz
dc.contributor.author
Rubino, Jorge German
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dc.contributor.author
Holliger, Klaus
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dc.date.available
2020-10-23T20:37:13Z
dc.date.issued
2019-05
dc.identifier.citation
Caspari, Eva; Novikov, Mikhail; Lisitsa, Vadim; Barbosa, Nicolas Daniel; Quintal, Beatriz; et al.; Attenuation mechanisms in fractured fluid-saturated porous rocks: a numerical modelling study; Wiley Blackwell Publishing, Inc; Geophysical Prospecting; 67; 4; 5-2019; 935-955
dc.identifier.issn
0016-8025
dc.identifier.uri
http://hdl.handle.net/11336/116771
dc.description.abstract
Seismic attenuation mechanisms receive increasing attention for the characterization of fractured formations because of their inherent sensitivity to the hydraulic and elastic properties of the probed media. Attenuation has been successfully inferred from seismic data in the past, but linking these estimates to intrinsic rock physical properties remains challenging. A reason for these difficulties in fluid-saturated fractured porous media is that several mechanisms can cause attenuation and may interfere with each other. These mechanisms notably comprise pressure diffusion phenomena and dynamic effects, such as scattering, as well as Biot's so-called intrinsic attenuation mechanism. Understanding the interplay between these mechanisms is therefore an essential step for estimating fracture properties from seismic measurements. In order to do this, we perform a comparative study involving wave propagation modelling in a transmission set-up based on Biot's low-frequency dynamic equations and numerical upscaling based on Biot's consolidation equations. The former captures all aforementioned attenuation mechanisms and their interference, whereas the latter only accounts for pressure diffusion phenomena. A comparison of the results from both methods therefore allows to distinguish between dynamic and pressure diffusion phenomena and to shed light on their interference. To this end, we consider a range of canonical models with randomly distributed vertical and/or horizontal fractures. We observe that scattering attenuation strongly interferes with pressure diffusion phenomena, since the latter affect the elastic contrasts between fractures and their embedding background. Our results also demonstrate that it is essential to account for amplitude reductions due to transmission losses to allow for an adequate estimation of the intrinsic attenuation of fractured media. The effects of Biot's intrinsic mechanism are rather small for the models considered in this study.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
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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
ATTENUATION
dc.subject
FRACTURES
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SCATTERING
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PRESSURE DIFFUSION
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POROELASTICITY
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WAVE PROPAGATION MODELLING
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NUMERICAL UPSCALING
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
Attenuation mechanisms in fractured fluid-saturated porous rocks: a numerical modelling study
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-10-07T13:57:50Z
dc.journal.volume
67
dc.journal.number
4
dc.journal.pagination
935-955
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Caspari, Eva. Universite de Lausanne; Suiza
dc.description.fil
Fil: Novikov, Mikhail. Novosibirsk State University; Rusia
dc.description.fil
Fil: Lisitsa, Vadim. Novosibirsk State University; Rusia
dc.description.fil
Fil: Barbosa, Nicolas Daniel. Universite de Lausanne; Suiza
dc.description.fil
Fil: Quintal, Beatriz. Universite de Lausanne; Suiza
dc.description.fil
Fil: Rubino, Jorge German. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
dc.description.fil
Fil: Holliger, Klaus. Universite de Lausanne; Suiza
dc.journal.title
Geophysical Prospecting
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1111/1365-2478.12667
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1111/1365-2478.12667
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