2016 | OriginalPaper | Buchkapitel
The meso-scale. Fractures as thin layers in Biot media and induced anisotropy
verfasst von : Juan Enrique Santos, Patricia Mercedes Gauzellino
Erschienen in: Numerical Simulation in Applied Geophysics
Aktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
A fluid-saturated poroelastic isotropic medium with aligned fractures behaves as a transversely isotropic and viscoelastic (TIV) medium when the predominant wavelength is much larger than the average distance between fractures. Here fractures are modeled as extremely thin and compliant porous layers. P-waves travelling in this type of medium generate fluid flow and slow (diffusion) Biot waves, causing attenuation and dispersion of the fast modes (mesoscopic loss). This chapter presents a set of compressibility and shear time-harmonic experiments on highly heterogeneous fractured poroelastic samples to determine the five complex and frequency dependent stiffnesses characterizing the equivalent TIV medium. These experiments are identified with boundary-value problems which solutions are computed using the finite element procedures.