Acoustics – Geophysical or subsurface exploration – Seismic source and detector
Patent
1989-02-14
1990-09-04
Tarcza, Thomas H.
Acoustics
Geophysical or subsurface exploration
Seismic source and detector
367 50, G01V 100
Patent
active
049536575
ABSTRACT:
In seismic exploration, a survey may be conducted using multiple seismic energy sources activated substantially simultaneously. A series of shots is made at each shot point, with a determinable time delay between the activation of each source for each shot. There must be at least two different determinable time delays in each series of shots. The seismic signals are recorded. A method of processing the signals to separate signals from each source is provided. For each signal receiver, the amplitudes of the signals from each shot in the series is summed. The signals are then time shifted, so that the signals from the second source to be activated are received at the same time, and the amplitudes for the series are summed. This step is repeated for each subsequently activated source. Time domain operators are derived, the operators and the summations Fourier transformed to the frequency domain, in which the signals received from each source are readily calculated. The separated signals may then be inverse Fourier transformed to the time domain.
REFERENCES:
patent: 3956730 (1976-05-01), Barbier
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patent: 4159463 (1979-06-01), Silverman
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patent: 4467459 (1984-08-01), Currie
patent: 4715020 (1987-12-01), Landrum, Jr.
Dillon Andrew J.
Halliburton Geophysical Services Inc.
Lobo Ian J.
Tarcza Thomas H.
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