a large feasibility study, 4D simultaneous pre-stack inversions and multi-disciplinary interpretation. Despite the technological challenge on using 4D seismic data on carbonate reservoirs, results overcoming our expectations are obtained, providing important insights upon fluid and pressure distribution, valuable for the ongoing history matching of the numerical simulation model. Having defined a methodology which is demonstrated to work for this particular carbonate reservoir, a short-term perspective is naturally to expand it to other similar Albian carbonates. It also opens the perspective of applying seismic time-lapse technology to even stiffer carbonates (e.g. Aptians “pre-salt”). With the recent huge new discoveries in carbonate reservoirs offshore Brazil, the perspective of being able to successfully use 4D seismic on these plays, in order to optimize placements of expensive wells, should have an enormous economic impact.


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