Estudo do processo de injeção de vapor em reservatórios de óleos pesados, usando poços verticais e horizontais

Abstract

In Brazil, most of the reservoirs are heavy oils, some reservoirs that initially have an energy capable of raising the fluid naturally, but with the passage of time of production this energy dissipates and, because of this, methods are analyzed to recover the oil that is still retained. For oils with high viscosity, the method that is widely used is the thermal method through the injection of steam, which aim to increase the temperature of the oil, in order to reduce its viscosity thereby improving the flow. The objective of this work was to analyze the influence of steam injection using different injection wells (vertical and horizontal) and producers (horizontal), in the work were analyzed two cases being one with only horizontal wells and the other with vertical injectors and horizontal producers. A numerical simulation was performed on the Computer Modeling Group (CMG) simulator STARS in the 2012.1 version. Among all the analyzed configurations of case 1 that became more efficient was the configuration with 4 PARES - DV = 4 and DH - 87.93 m presenting a recovery factor of 21%, in the configurations for case 2 the most efficient was A with 9 vertical injectors and 2 horizontal producers achieving a recovery factor of approximately 39%, the two were compared to each other and when it comes to recovery the configuration of case 2 was better, but to ensure the accuracy of the best configuration, a Technical-economic analysis attesting the feasibility of the same.