Eficiência dos arranjos de poços na recuperação de óleo pesado usando combustão in situ

• Ano de defesa: 2010
• Autor(a) principal: Frota, Diego Araujo
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Palavras-chave em Português: Escoamento em meios porosos; Óleo; Reservatório; Física dos fluidos; Física de plasmas; Descargas elétricas
• Link de acesso: http://www.repositorio.ufc.br/handle/riufc/11920

This thesis contains an efficiency study of several well configurations together with insitu combustion method for oil recovery from petroleum resevoirs. The demand for energy continuously increases with the world economic growth. The world energetic matrix still deeply relies on fossil fuels and especially on petroleum, whose exploitation constantly requires the solution of technological problems in order to optimize the recovery from new horizons, mature oil fields and of heavier oils. Several enhanced oil recovery (EOR) methods exist and they include the injection of fluids and/or chemical reactions to increase reservoir pressure and/or reduce fluid viscosity. Among them there is the in-situ combustion method which consists of the burning of local oil caused by the injection of air in the reservoir with a posterior ignition of the oil through an external heater. The well drilling technology also evolved and the drilling of horizontal well are now frequent. This kind of well has a larger contact with the oil bearing layers, which might facilitate the oil recovery. The determination of the best recovery method for each reservoir is an important economic issue, and this is best assessed through numerical simulations. This work includes a brief recolection of concepts and equations used in the mathematical modelling of the flow of heat and mass in porous media. Our purpose is to investigate the performance of several well configurations by performing numerical reservoir simulations with the simulator STARS by CMG. We qualitatively compare the efficiency of various well configurations (VIHP, VI2HP, HIHP, HI2HP, and 2VIHP) applying the in situ combustion method for 300x100x20 meters heavy oil reservoirs. The physical and chemical properties of the reservoir and the chemical reactions are based on Wolf Lake reservoir. It was investigated also the influence of those parameters which control the oil viscosity dependency with temperature. Our results show that the configuration 2VIHP gives the best recovery among the configurations studied independently of the parameters that we have considered here.