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DISCO-FOCUS

  1. SEG-D input (two format codes had been used: 8048,8058)
  2. Load Geometry: fold, 6 or 16 or 24 (100m, 37.5m, 25m distance between shots)
  3. Re-sampling data at 4 ms
  4. Band-pass filter: 6-9-58-62.5 Hz
  5. Edit traces
  6. Hand Statics: -20 ms
  7. True Amplitude Recovery: basis for spherical spreading (1/dist)
  8. Gapped deconvolution op. Length:400ms; prediction leg: 24ms; time variant trace equalization
  9. CMP sorting
  10. Interactive Velocity Analysis
  11. NMO Correction and Stack
  12. Top mute
  13. Finite difference time migration
  14. Band pass filter: time and space-variant Ormsby band-pass filter
  15. Time Scaling: Automatic Gain Control type of AGC scalar: normally 2000ms but sometimes 6000ms
  16. Trace plotting in a Oyo Geospace plotter: plotter device 24 inch, bytes per scan 1184

Figures 6, 7 and 8 show examples of segments of seismic profiles obtained during this campaign.

Figure 7: BS98. MCS line BS22, stack.
\includegraphics[width=\linewidth]{IMG/BS22_STACK.eps}
Figure 8: BS98. MCS line BS22, migrated.
\includegraphics[width=\linewidth]{IMG/BS22_MIGRATX.eps}


2010-05-12