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The Carapebus Formation, Tertiary Unit of the Campos Basin is an important target for studies, since it has the main hydrocarbon reservoirs in the Campos Basin. Based on sedimentological data from the 1RJS0541 RJ and 1 BRSA 187 RJS wells of the Eastern Marlim Oil Field (Offshore of the Campos Basin), stratigraphic sections of the Carapebus Formation were elaborated in order to achieve facies analysis and paleoenvironmental reconstruction. The data provided by the Agência Nacional de Petróleo, Gás e Biocombustíveis (ANP), are constituted by drill cuttings descriptions and geophysical profiles (Gamma, Resistivity, Sonic, Density and Neutron Rays). The facies association and architectural elements allowed the identification of sedimentary processes associated to deep waters, which according to Bruhn et al. (1998) indicate proximal, intermediate and distal deposition of turbidite systems. Deposits of mass flows associated with higher energy conditions were formed in channel complexes in the proximal portion. Muddy and sandy-rich turbulent flows were deposited in unconfined channels in the intermediate portions, while in the distal portions shales and marls were the main sediment deposits. The reconstruction of paleoenvironmental, based on the architectural models proposed by Haugthon et al. (2006), suggest a decrease in sea level during the deep-sea submarine fans deposition.

Facies Analysis and Depositional Environments of the Carapebus Formation in the Campos Basin (Eastern Marlim Field)