Deblending of Simulated Simultaneous Sources Using an Iterative Approach - an Experiment with Variable-depth Streamer Data

We have simulated a simultaneous source experiment with a real variable-depth streamer NAZ survey acquired in Brazil and applied an iterative separation flow using a hybrid of median and f-x projection filters for deblending. The results show little leakage after deblending in both near and far offsets while preserving the AVO characteristics. We have also performed Kirchhoff migration in order to examine the residual cross-talk in common image gathers after deblending. The results reveal little leakage, and the quality of the common image gathers is adequate for velocity model building. We also study how the existence of spatial aliasing when shots are coarsely sampled degrades the deblending quality. Lastly, the impact of firing multiple sources simultaneously to improve shot sampling is investigated.