Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Offshore prospecting
Patent
1994-09-02
1996-05-28
Jordan, Charles T.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Offshore prospecting
367 46, 367 52, 364421, G01V 122
Patent
active
055218814
ABSTRACT:
Disclosed is a method of processing seismic data containing multiples, which method generally includes as a step, determining the two-way travel time to a suspected multiple generating event. This method includes the application of a normal moveout operation to the recorded seismic trace utilizing the primary event velocities. Once the normal moveout has been applied to the data, all of the events in the trace are shifted downward in time by an amount of time equal to the two-way travel time to the suspected multiple generating event as previously determined. Once the normal moveout operation and the two-way travel time shift have been applied to the trace, a reverse normal moveout operation is applied to the trace utilizing an extended velocity function, which is a function of the original primary and the velocity within the suspected multiple generating layer. The resulting trace is now a trace containing only multiples. Finally, the multiple noise is subtracted from the original data utilizing an amplitude scaling factor and a residual time shift.
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Lau Yiu-Wa A.
Pham Long D.
Exxon Production Research Company
Gilbreth J. M.
Jordan Charles T.
Montgomery Christopher K.
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