ACKNOWLEDGEMENTS

Halliburton Geophysical Services kindly donated the data used in this paper. We would like to thank Mihai Popovici for converting the data to the seplib format and David Lumley for providing us with the velocity model he used for his imaging results.

 

inlint20
Figure 2 Inline section taken along crossline Y=4000 meters. The section shows much diffracted energy caused by salt-sediment interfaces.

 

inlind620
Figure 3 Inline section taken from the migrated volume at the same position as the section above in Figure  2. The 9-9 averaged filter was used in the migration. The diffractions are collapsed by the migration. The fault at (x=10,800 m) is clearly visible in the migrated section.

 

crsl117
Figure 4 Cross slice taken along X=10800 meters. The top of the salt can be seen at Y=7000 meters and z=1380 meters. The top section shows the output of the nine-point filter and the bottom shows the output of the 9-9 averaged filter. Click button to see movie.

 

depsl138
Figure 5 Top section, shows the depth slice at 1380 meters from the migration implemented using the nine-point filter, the bottom section is the corresponding one implemented using the 9-9 averaged filter. This depth slice shows the top of the salt. The differences between the two depth slices are small. Click button to see movie alternating between the two.

 

depsl160
Figure 6 Depth slice at 1600 meters from the migration implemented using the nine-point filter (top), the same slice from the migration implemented with 9-9 averaged filter (bottom). The differences are small. The difference of the sections is shown in Figure 7. Click button to see a movie of the two slices.

 

diff160
Figure 7 Difference in the depth slices shown in Figure 6. The peak amplitude is 0.3 times that of the peak amplitude in the depth slices.