Page 382 - Acquisition and Processing of Marine Seismic Data

7.2 PREDICTIVE DECONVOLUTION 373

FIG. 7.8 Application of inner mute. (A) Four successive CDPs with first- and second-order multiples (M 1 and M 2 ), (B) inner
mute zones (shaded areas) to remove in-phase multiple amplitudes, (C) full offset stack, and (D) stack with inner mute.

lag close to the sampling rate of input seismic reveals the unpredictable components, such as
data in predictive deconvolution can be used primary reflections (Peacock and Treitel, 1969).
to improve the temporal resolution, while a Considering the long period multiples related
higher lag value results in the suppression of to the seafloor, if the reflection coefficient of
multiple reflections. The prediction filter in the the seafloor is R S , then the recorded time series
2
deconvolution process obtained by Eq. (6.21) will be {R S ,0,0, …,0, R S ,0, …,0, R S ,0, …,0,
3
predicts the periodic events in the seismogram, R S , ….}. This periodicity in the time series
such as multiples, and the prediction error filter appears as periodic peaks (or notches) in the