A 2D profile (Line A-A') of the SEG/EAGE Salt model was used to test the imaging of the Salvo algorithm. This data was provided by O'Brien and Gray and is the same data used in their paper, "Can we image beneath salt?", which appeared in The Leading Edge on January 1996. This data does not have the surface-related multiples removed but includes receiver offsets up to 14,000 ft. Three hundred twenty-five shots were collected with a shot advancement 160 ft.

The migration grid of 1647x500 points was computed over the entire imaged region, and had a grid spacing of 40 ft by 30 ft for the x and z directions, respectively. The migration was completed on an Intel Paragon, and 127 compute nodes and 1 I/O node were used. Each shot took approximately 118 seconds for total runtime of about 10.7 hours.

Shown above and below are the velocity model and the Salvo image. The green lines in the center image is lines of constant velocity. The image to the bottom right is of the Salvo image with a transparent overlay of the velocity model.

Movies

Movie showing the stacking of Salvo images
     MPEG Video (2 MB)

Curtis C. Ober

Last modified: October 9, 1998