Time Lapse Processing Of Obc Vs. Streamer Data In A Campos Basin Deep Water Field

Time lapse seismic has matured a lot in the past years. The repetition in positioning for new acquisitions, followed by a rigorous parallel processing, has become the norm for time lapse studies. However, when we decide to perform a 4D processing using two surveys with very different acquisition configurations, like towed streamer and OBC, repeatability does not exist and a parallel processing can hardly been applied. Previous studies involving these configurations in a shallow water environment showed that reliable 4D signal could be obtained, even if those fundamentals in time lapse acquisition and processing were not met. The purpose of our study was to assess if reliable 4D signal could still be recovered when towed streamer and OBC data are compared, but this time in a deep water environment.