Caracterização dos reservatórios do grupo Macaé no Campo de Garoupa - Bacia de Campos - por meio de interpretação sísmica e perfis de poço

The study area is the Garoupa Field, located 75 km from the coast of Rio de Janeiro in bathymetric elevation of 125 m and it is the first important offshore discovery of the Campos Basin with hydrocarbon production in the Albian carbonates. The high significance of carbonate rock reservoirs for the global oil industry and its degree of complexity, combined with the fact that the Garoupa Field is a mature field, make this research project interesting to develop a re-exploratory vision of the study area. The objective of this paper is to characterize the physical properties of the Macae Group reservoirs in the Garoupa Field through well correlation techniques, petrophysical analysis and seismic interpretation (3D), in order to evaluate qualitatively and quantitatively the response of geophysical data to the presence of carbonate rock reservoirs. From the analysis of well profiles (gamma ray, resistivity, density and sonic) it was possible to identify six reservoir levels in the Quissamã Formation. As a result, the reservoirs have good correlation between the wells in the Garoupa Field and show lateral facies variation. In the seismic interpretation, structural contour maps were generated in time (ms) from the top of the Macae Group and two horizons that correspond to the reservoir levels. These maps show that the oil producing area of this field is a structural high located at the west of the interpreted seismic cube, and it was classified as a rollover limited by lateral faults forming a horst. The seismic attribute maps show a good response to the reservoirs of the Garoupa Field because they are associated with amplitude anomalies, verified by the correlation between the physical properties of the reservoir rock and seismic data through cross plots, with emphasis in a linear correlation between the resistivity profile and the values of Maximum Absolute Amplitude and RMS Amplitude attributes

Evolução tectonossedimentar dos principais reservatórios de hidrocarbonetos do Campo de Golfinho (Bacia do Espírito Santo)

The Golfinho Field is located in the offshore region of the Espírito Santo Basin. Its importance is linked to the current average production about 19,000 barrels of oil per day, in turbidite reservoirs , giving it the nineteenth placement among the largest oil fields producing of Brazil. By interpretation and correlation’s methods based on 2D seismic sections and geophysical well logs, the study of tectonic-sedimentary evolution of major Golfinho Field’s reservoirs, which are located in Maastrichtian , aims understand and characterize the geological model of the area for the purpose of identify the main structures and types of reservoirs, improving the geological understanding of the area and using this knowledge at similar sets, that may present exploratory success in similar cases. By structural contour maps and geological cross-sections generated since time-depth conversion , the results defined for the geological model of the area , two distinct tectonic styles: a distensinal tectonics style , characterized by grabens and horsts , which belongs to rift phase, and a salt tectonics style, characterized by salt domes , listric faults and folds rolllover folds type, which belongs to marine phase . The interpretation of seismic sections and subsequent analysis of the main deformations present in the Maastrichtian reservoirs rocks ( turbidites ) showed that the northern region of the field is the most affected by salt tectonics . As for reservoirs, it was concluded to be associated to tectonics formed by rollover folds type, being older than listric faults