Análise financeira de injeção de polímeros para recuperação de óleo com o uso de simulação computacional

Abstract

A portion of the oil present in a reservoir presents difficulties to be recovered due to the effects of viscosity existing between the injection water – or conate – and the oil. In order to solve this impasse between the viscosity of both, an attempt is made to increase the viscosity of the injected water so that the front of the displacer fluid advance becomes more gradual and homogeneous. Viscosity, in turn, can be increased by mixing polymers in the aqueous solution to be injected. This work studied the effects on oil recovery from a reservoir with characteristics of the Brazilian Amazon when subjected to injection of three different polymers: xanthan gum, poly(ethylene oxide) and polyacrylamide. Therefore, the CMG software was used to provide the necessary simulations. In addition, a cost analysis was carried out via the Net Present Value technique, in order to economically verify which of the three solutions is more viable. Thus, the Xantana Gum polymer was the one that presented the best technical and financial results for the theoretical reservoir analyzed.