--> Abstract: Thermo-Mechanical Basin Modeling along Camamu-Almada Basin, Brazil; #90063 (2007)

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Thermo-Mechanical Basin Modeling along Camamu-Almada Basin, Brazil

 

Bedregal, Ricardo Perez1, Garry David Karner2, Felix T.T. Goncalves3 (1) LAB2M / COPPE / UFRJ, rio de janeiro, Brazil (2) ExxonMobil Company, Houston, TX (3) PGT Petroleum Geoscience Technology, Rio de janeiro, Brazil

 

During a lithospheric extension event, depositional packages and their bounding surfaces are a consequence of the distribution, in time and space, of the rift system along the margin, and of the resultant structural and sedimentological interactions. The main goal of this work is to map the distribution and amplitude of the extensional tectonics responsible for the preservation of the sedimentary record of Camamu-Almada basin, in the Brazilian eastern margin.

 

Syn-rift evaporites and post-rift sediments regional distribution and thicknesses along this margin are not consistent with the observed weak brittle Early Cretaceous deformation. The existence of an intracrustal detachment is suggested, in order to explain the deformation compartmentalization along depth. Maximum heat flow modeled for the end of the rift phase, in both margins, is circa 200-220 mW/m2 in deep water and 42-70 mW/m2 in the coast region.

 

As a consequence of the extreme thinning of the lower crust and lithospheric mantle, the viability of potential source rocks and deep-water regions prospectivity in the Brazilian margin will mostly depend on the delicate interaction between the extended lithosphere cooling and subsequent burial of potential source rocks, in time.

 

AAPG Search and Discover Article #90063©2007 AAPG Annual Convention, Long Beach, California