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The Santos basin in Brazil’s offshore has made important discoveries and producing fields from pre-salt Barra-Velha lacustrine carbonates. In Well S1, an intra-salt carbonate section of exceptional porosity and permeability was identified within the salt body. Seismic interpretation and sample analysis indicate that the intra-salt carbonate is a component of the lacustrine Barra Velha Formation carbonate. Further investigation and evaluation of this peculiar intra-salt play could result in substantial successes in the Santos and Campos basins.