Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1989-04-14
1993-10-12
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
367 57, 364421, G01V 136
Patent
active
052532178
ABSTRACT:
A method of seismic exploration is disclosed wherein a signal recording obtained from subsurface geophone receivers placed below the weathered layer is used to characterize the waveform of the downgoing signal generated in the earth by a surface seismic source. The reflections of the source signal measured at the earth's surface at a point remote from this source are then deconvolved with an operator derived from the subsurface waveform in order to eliminate or compensate for the filtering effect of the weathered layer. Successive measurements of the downgoing source signal are taken at the earth's surface as the source is advanced along a seismic line. One of such surface signals can be combined with the subsurface signal recording in order to derive a transfer function indicative of such filtering effect for the intervening weathered layer. This transfer function may then be convolved with each of the successive surface signals to predict corresponding updated values for the subsurface waveform (and hence the deconvolution operator) as the source is moved from each shot point to the next.
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Airhart Tom P.
Justice, Jr. Mahlon G.
Atlantic Richfield Company
Betz Robert M.
Moskowitz Nelson
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