Análise dos métodos de recuperação utilizados nos campos do pré-sal

Abstract

With layers between 1,000 and 2,000 meters deep, the Brazilian pre-salt is one of the great discoveries of the 21st century by Petrobras. Covering an area of approximately 150,000 square kilometers, of which 24,000 have exploration rights, the reservoirs present stand out for their medium API grade oil and high quality. Among the investments made over the years to study the scenarios for these fields, one of the techniques developed has been reservoir modeling. The aim of this study was to analyze the behavior of a reservoir subjected to water injection and gas injection with the characteristics of the Brazilian pre-salt. To do this, a submodel of the UNISIM semi-synthetic reservoir was extracted and some operating parameters were varied, such as the type of mesh and different injection flow rates. The results showed that the model using gas injection showed better oil recovery when compared to water injection. To complement the results, an economic analysis of the models with the highest Recovery Factor (RF) was carried out using the Net Present Value (NPV). It was found that the models analyzed showed a positive final NPV, with the 5-spot-inverted mesh model with gas injection showing the highest return in the shortest time compared to the model using water injection