SEG-Y Loading Gathers with Offsets in Centimetres

  1. Run SEGY-Y Loader and load the SEG-Y as channel gathers.
  1. Specify one of the headers as channel.
    • This example used the header at byte 5 (tracr)
  1. Check the bin size, make sure it is correct (e.g. "Max fold 80").
  2. Write the result to a .dugio volume.
  1. Start Insight.
  2. Add the volume to the session.
  3. In the Volume tab, select the volume
  4. Export the volume as SEG-Y.
  5. Edit the SEG-Y header and modify the trace headers.
  1. Change the offset byte 37 to a formula defined as offset/100.
  1. Run SEG-Y Loader and load the new scaled SEG-Y as offset gathers.
  1. Specify byte 37 as offset.
  1. After the load completes, add the new DUGIO volume to the session.
  2. Select the new DUGIO volume.
  3. The offset range should now be correct.
  1. View the gathers
    • Offset Vol: Select the new volume.
  2. If the original unscaled gathers are in the session, the Offset axis will be huge (i.e. 100 times larger than necessary). To correct the display, remove the original gathers from the session or zoom in to the left edge of the offset gathers.
  3. Remember to delete the unscaled gathers after checking the scaled version if you need the disk space.