3D Modelling of Laterally-Stacked Channel Elements in Turbidite Reservoirs, Deepwater Espiacute;rito Santo Basin, Brazil
The Golfinho submarine channel is located in the present-day deepwater portion of the Espiacute;rito Santo Basin, Brazil. It was filled by a sand-rich turbidite system ranging in age from Santonian to Early Eocene. The Paleocene/Maastrichtian sequence of this system is the most important hydrocarbon reservoir in the basin. In the past, this turbidite sequence was interpreted as a complex of amalgamated channels. However, applying a genetic mapping method based on new seismic data, it was possible to discriminate individual laterally-stacked channel elements. The mapping of laterally-stacked surfaces allow the characterization of 15 channel elements that migrate from southwest to northeast, probably as a response from underlying halokinetic compensation during their deposition. Considering these mapped surfaces, a new 3D model was built to better represent the depositional geometry of laterally-stacked channels, and to improve the fluid flow model for the reservoir. Reservoir geometry had a critical impact on the facies and heterogeneity distribution and can strongly influence the fluid flow in the field. This new interpretation and 3D model, honoring the depositional geometry, allow a better understanding of the reservoir performance.
AAPG Search and Discovery Article #90166©2013 AAPG International Conference & Exhibition, Cartagena, Colombia, 8-11 September 2013