3D Petroleum System Modeling and Exploration Risk Assessment of the Plays, Leads and Prospects of the Rift and Drift Sections of the Deep and Ultra Deep Areas encompassing the blocks of the Pre-salt Giant Oil Fields of the Southern Santos Basin
Multiclient studies available for the upcoming Bidding Rounds
This project was developed in a large deep water area of Santos Basin, where important oil discoveries were made: Lula, Sul de Lula, Sapinhoá, Sul de Sapinhoá and Lapa. The basis of the project was a 3D seismic dataset that allowed the interpretation of nine stratigraphic horizons. A complex 3D structural restoration was carried out of the salt layer through time that influenced the fill and spill of hydrocarbons in the area. A geological sensitivity analysis was carried out on the richness of the main source rocks to understand the inherent interactions between hydrocarbon migration, composition, charge of reservoirs and volumes of the accumulated petroleum.
The organic-rich sedimentary section expected to be present in the Santos basin can be divided into three potential source rock systems: the lacustrine Guaratiba Formation; the marine anoxic Guarujá Formation and the marine highly anoxic Itajaí-Açu Formation. The source rocks are mature and contributed to the hydrocarbon generation and migration. The traps are essentially of structural nature with large anticlines related to salt pillows and sandstones pinchout.
All of the recent discoveries in the studied area were reproduced by the model. The main expected reservoirs in this model are in the rift sequence, especially in the microbial limestones in the top of the Alagoas Sequence. In addition to the pre-salt accumulations, future liquid reserves in Santos Basin should also come from late Cretaceous deep-water turbidite sandstone reservoirs.
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