Report 5 AUTOCORRELOGRAM DEPTH AND TIME MIGRATION FOR RVSP DATA

This report presents the results of applying an improved autocorrelogram migration to Exxon's Friendswood RVSP data. The improved autocorrelogram migration method is implemented in both the depth and time domains. Two imaging conditions are used: a primary re ection imaging condition and a surface-related ghost imaging condition. The raw traces in the common receiver gather domain are autocorrelated to generate the autocorrelograms. The nal primary and ghost autocorrelograms are obtained by F-K ltering, and the resulting primary and ghost images in the depth domain are compared with well log data. Results show that the primary autocorrelogram migration yields a better correlation with the well log synthetic seismogram. The results for time-domain autocorrelogram migration are also obtained and show a good correlation with the surface-stacked section.