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BOREHOLE COUPLING OF SEISMIC WAVES IN A PERMEABLE SOLID1
- Source: Geophysical Prospecting, Volume 36, Issue 4, Jun 1988, p. 417 - 429
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- 27 Apr 2006
Abstract
ABSTRACT
Expressions are derived for the acoustic pressure in a fluid‐filled borehole due to the passage of plane compressional or shear waves propagating in a porous and permeable medium. The derivation is based on a quasistatic description, yielding results applicable at low frequencies. Computations for a plausible sandstone (with porosity of 0.21 and permeability of 300 millidarcies) show accoustic pressure to be a surprisingly distortion‐free version of the stress waveform in a plane compressional wave. For a plane shear wave, the pressure waveform is visibly distorted.