1. Basic Seismic Processing INPUT FILTER CMP Gather NMO STACK MIGRATE DISPLAY GEOM VEL ANAL STATICS MUTE

2. More Seismic Processing INPUT BP FILTER CMP Gather NMO STACK MIGRATE DISPLAY GEOM VEL ANAL STATICS DEMUX VIB CORR FK FILTER DECON DMO/ MIGRATE SAVE DECON FK FILTER MUTE GAIN RCVR COHERENCY ENHANCE COHERENCY ENHANCE TIME TO DEPTH EDIT

3. Pre-Processing IN OUT DEMULTIPLEXING VIBROSEIS CORRELATION PtPt Corr S t Raw S t PtPt X= Issues: Demultiplex skew Issues: DeSpike B4 Corr Filtered Pilot Raw S -t PtPt * = Yilmaz, 2001

4. Vibroseis Correlation Yilmaz, 2001

5. Gain Recovery Options: Automatic Gain Control (AGC) Gain info lost Spherical Divergence (Need V t ) Exponential Gain Correction Programmed Gain Control (PGC) Trace to Trace Gain Balance Amplitude Statics Yilmaz, 2001

6. Gain Recovery Original with Spherical Gain Correction Yilmaz, 2001

7. Gain Recovery: AGC = window length AGC shadow Yilmaz, 2001

8. Editing

9. Band Pass Filter stst t s’ t t Input Output SfSf f f f S’ f RfRf rtrt Filter X= * = Time domain Frequency domain

10. Bandwidth/Filter Length Filter length Bandwidth = f 2 /f 1 50/2535/5

11. Filter Shape

12. Band Pass Filter: Resolution Increasing frequency Increasing Bandwidth model

13. Bandpass Filter Test TVF = Time Varying Filter

14. FK (2D) Filtering t f x k

15. FK Filtering

16. Spatial Aliasing

17. FK Filtering

18. FK Spectra before after B4 After

19. Convolutional Model * W t =

20. Deconvolution conv decon Poor decon

21. Deconvolution

22. Deconvolution Before Decon After Decon