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Published in:
2016 | OriginalPaper | Chapter
A poroelastic solid saturated by a three-phase fluid
Authors : Juan Enrique Santos, Patricia Mercedes Gauzellino
Published in: Numerical Simulation in Applied Geophysics
Publisher: Springer International Publishing
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A theory to describe the propagation of waves in a poroelastic solid saturated by a three-phase fluid is presented and anlyzed. The model takes into account the existence of two capillary and three relative permeability functions, assumed to depend on the non-wetting fluid saturations. A plane wave analysis predicts the existence of four compressional waves, denoted as P1, P2, P3 and P4, and one shear wave, all of them suffering attenuation and dispersion effects. A numerical example showing the behaviour of all waves as function of saturation and frequency in a sample of Nivelsteiner sandstone saturated by water, oil and gas is presented.