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Artículo

A generalized effective anisotropic poroelastic model for periodically layered media accounting for both Biot's global and interlayer flows

Milani, Marco; Monachesi, Leonardo BrunoIcon ; Sabbione, Juan IgnacioIcon ; Rubino, Jorge GermanIcon ; Holliger, Klaus
Fecha de publicación: 07/2016
Editorial: Wiley Blackwell Publishing, Inc
Revista: Geophysical Prospecting
ISSN: 0016-8025
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Meteorología y Ciencias Atmosféricas

Resumen

We present a generalized effective poroelastic model for periodically layered media in the mesoscopic scale range, which accounts for both Biot's global and interlayer wave-induced fluid flow, as well as for the anisotropy associated with the layering. Correspondingly, it correctly predicts the existence of the fast and slow P-waves as well as quasi and pure S-waves. The proposed analytical model is validated through comparisons of the P-wave and S-wave phase velocity dispersion and attenuation characteristics with those inferred from a one-dimensional numerical solution of Biot's poroelastic equations of motion. We also compare our model with the classical mesoscopic model of White for a range of scenarios. The results demonstrate that accounting for both wave-induced fluid flow mechanisms is essential when Biot's global flow prevails at frequencies that are comparable or smaller with respect to those governing interlayer flow. This is likely to be the case in media of high permeability, such as, for example, unconsolidated sediments, clean sandstones, karstic carbonates, or fractured rocks. Conversely, when interlayer flow occurs at smaller frequencies with respect to Biot's global flow, the predictions of this model are in agreement with White's model, which is based on quasi-static poroelasticity.
Palabras clave: Anisotropy , Attenuation , Mathematical Formulation , Rock Physics
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/54630
DOI: https://dx.doi.org/10.1111/1365-2478.12406
URL: https://onlinelibrary.wiley.com/doi/abs/10.1111/1365-2478.12406
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Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Citación
Milani, Marco; Monachesi, Leonardo Bruno; Sabbione, Juan Ignacio; Rubino, Jorge German; Holliger, Klaus; A generalized effective anisotropic poroelastic model for periodically layered media accounting for both Biot's global and interlayer flows; Wiley Blackwell Publishing, Inc; Geophysical Prospecting; 64; 4; 7-2016; 1135-1148
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