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Multi-Component Acoustic Characterization of Porous Media (Paperback, 2013 ed.)
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Multi-Component Acoustic Characterization of Porous Media (Paperback, 2013 ed.)
Series: Springer Theses
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The feasibility to extract porous medium parameters from acoustic
recordings is investigated. The thesis gives an excellent
discussion of our basic understanding of different wave modes,
using a full-waveform and multi-component approach. Focus lies on
the dependency on porosity and permeability where especially the
latter is difficult to estimate. In this thesis, this sensitivity
is shown for interface-wave and reflected-wave modes. For each of
the pseudo-Rayleigh and pseudo-Stoneley interface waves unique
estimates for permeability and porosity can be obtained when
impedance and attenuation are combined. The pseudo-Stoneley wave is
most sensitive to permeability: both the impedance and the
attenuation are controlled by the fluid flow. Also from
reflected-wave modes unique estimates for permeability and porosity
can be obtained when the reflection coefficients of different
reflected modes are combined. In this case the sensitivity to
permeability is caused by subsurface heterogeneities generating
mesoscopic fluid flow at seismic frequencies. The results of this
thesis suggest that estimation of in-situ permeability is feasible,
provided detection is carried out with multi-component
measurements. The results of this thesis argely affect geotechnical
and reservoir engineering practices.
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