Download Multi-Component Acoustic Characterization of Porous Media by Karel N. van Dalen PDF

By Karel N. van Dalen

The feasibility to extract porous medium parameters from acoustic recordings is investigated. The thesis provides an exceptional dialogue of our simple realizing of alternative wave modes, utilizing a full-waveform and multi-component process. concentration lies at the dependency on porosity and permeability the place particularly the latter is hard to estimate. during this thesis, this sensitivity is proven for interface-wave and reflected-wave modes. for every of the pseudo-Rayleigh and pseudo-Stoneley interface waves targeted estimates for permeability and porosity should be acquired whilst impedance and attenuation are mixed.
The pseudo-Stoneley wave is such a lot delicate to permeability: either the impedance and the attenuation are managed by way of the fluid stream. additionally from reflected-wave modes particular estimates for permeability and porosity may be received whilst the mirrored image coefficients of alternative mirrored modes are mixed. for this reason the sensitivity to permeability is as a result of subsurface heterogeneities producing mesoscopic fluid circulation at seismic frequencies. the result of this thesis recommend that estimation of in-situ permeability is possible, supplied detection is conducted with multi-component measurements. the result of this thesis argely impact geotechnical and reservoir engineering practices.

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