Geoligical outline of the Lower Cretaceous Bahia Supergroup, Brazil
The report area encompasses about 41,200 sq km covered by over 6,000 m of Lower Cretaceous sediments deposited in fresh to brackish water environment. These sediments, the Bahia Supergroup, represent most of the sedimentary section of the Almada, Reconcavo, Tucano and Jatoba basins. The Reconcavo basin is a half-graben filled with Lower Cretaceous rocks which tilt regionally to the SE. The sediments deposited in this basin were distorted by 2 major periods of deformation. As the result of the application of these systems of tensional forces, the sediments were broken into a complicated system of normal faults. Most of the oil production in Brazil, about 91,000 bpd, comes from the Reconcavo basin. During a great part of the Early Cretaceous the Reconcavo and Almada basins probably were connected with the Alagoas-Sergipe basin by the continental shelf. The continental drift theory may explain the presence of these fresh water sediments in the coast line and in the continental shelf of the Bahia and Alagoas-Sergipe states. This offshore area is very prospective and may contribute, in the future, with substantial quantities of hydrocarbons. (14 refs.)
- Research Organization:
- Petroleo Brasileiro SA
- OSTI ID:
- 6058411
- Journal Information:
- Proc. 2nd West African Micropaleontol. Colloq.; (United States), Journal Name: Proc. 2nd West African Micropaleontol. Colloq.; (United States)
- Country of Publication:
- United States
- Language:
- English
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