Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Reexamination Certificate
2004-10-25
2010-02-16
Hughes, Scott A (Department: 3663)
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
C367S057000
Reexamination Certificate
active
07663971
ABSTRACT:
Resonance scattering analysis of at least 3-component (3-C) VSP data detects heterogeneities in the proximity of a borehole. A method for seismic exploration of a pre-determined volume of the earth for assessing features of the volume using at least 3-C VSP data generated for the volume comprises: computing a resonance spectra indicating resonance scattering of the at least 3-C VSP data; and determining a lateral continuity of said features in accordance with the resonance spectra. Zero amplitude in a resonance spectrum indicates definite polarization of the direct pressure wave into the ray direction and very weak lateral heterogeneity along the path of the direct wave. High amplitudes in a resonance spectrum are observed if energy of the direct wave is observed on the horizontal components due to scattering at small-scale lateral heterogeneities near the receiver. Peak frequency provides information on the size and location of the scattering structure.
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Bohlen Thomas
Milkereit Bernd
Hughes Scott A
Ogilvy Renault LLP
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