Abstract
In the northern part of the Maceió Formation, Alagoas Basin, there is the Barreiras do Boqueirão outcrop, located in Japaratinga (AL). In this outcrop a faciological, petrographic and diagenetic characterization of the sandstone outcrop was performed to build a simplified oil reservoir model. The response of the petrographic characterization provided porosity data along with the diagenetic processes. In this way, the geological study was able to provide input for further analysis regarding flow behavior. A simplified physical model representing the outcrop was first built, and two other physical models: one representing the petrophysical data used by Lira (2004), whose study was also carried out in the same outcrop, and an advanced recovery model through the steam injection method. Thus, it was possible to verify that the simplified model of the Maceió Formation presented low oil recovery and the continuous steam injection model had the best results in hydrocarbon production. Finally, a parametric analysis of the operational conditions of the injection wells was carried out in order to verify the influence of steam quality and injection flow rate on hydrocarbon recovery. The model with advanced recovery was the one that obtained the highest oil recovery, whereas the Lira (2004) model, even with the insertion of steam in the reservoir, did not present optimistic results. As for the oil production, it presented a discrepant recovery factor in relation to the value that was actually found in this study, and the simplified model of the Maceió formation indicated the lowest oil recovery.
Published Version
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