Caracterização de estruturas rúpteis e impactos na simulação de fluxo em arenitos da Bacia do Rio do Peixe.

Abstract

The deformation bands when present in siliciclastic reservoirs may act as barriers or conduit for the fluid flow in the reservoir. Because of this, they must have their known petrophysical parameters and geomechanical serving initial conditions input to the modeling and simulation of fluid flow in reservoirs analogs. This work was developed in Rio do Peixe Basin and the main objective is characterize the influence of deformation bands on the properties that govern the fluid flow in sedimentary rocks affected by these structures and identify their behavior when subjected to reservoir conditions. To achieve this purpose, we used the collection of plugs for petrophysical analysis, conducting scanlines sections on pre-defined profiles along the floor and the wall of the outcrop, as well as conducting geomechanical profiles. The analysis of scanlines concluded that the higher frequency deformation bands are concentrated in the main body, reaching 16 deformation bands. The geomechanical analysis concluded that the conglomeratic facies without deformation bands has a higher resistance value as compared with the facies with deformation bands. The thickness of the deformation bands acts directly on the resistance values, which bands with thicknesses greater than 2 cm are less resistant when compared with thinner bands. The petrophysical analysis showed that increased porosity results in higher permeability values. However, the set N-S is increased porosity leading to lower permeability values. The computer simulation concluded that the set NE showed greater retention of oil and the set N-S greater water retention.