The Campos and Santos basins are two major hydrocarbon basins along Brazils Adantic Margin. The oldest syn-rift discovery underlying the extensive regional salt horizon was 1978's Linguado field in the Campos basin, although, subsequentiy, the pre-salt remained an unattractive, difficult target. Not until 2006, and the discovery of the Tupi/Lula field in the Santos basin (the largest pre-salt discovery to date in the Brazilian margin), was the scale of the potential reserves appreciated. Since the success of Tupi field, exploration and production of pre-salt plays has added enormously to Brazils offshore reserves, as subsequent pre-salt discoveries have followed in both the Campos and Santos basins.
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