Reservoir simulation of carbon dioxide enhanced oil recovery in an ultra-low permeability oilfield.

摘要

Carbon dioxide enhanced oil recovery is not only an effective way to manage carbon dioxide emissions, but also a superior choice to achieve oil recovery. This thesis concentrates on CO2-EOR in an ultra-low permeability reservoir. Matrix permeability has been shown to be less than 0.001 md for most parts of the reservoir. Careful selection of modeling strategy, data collation and screening, enabled the construction of a dynamic model, which was adjusted through history matching of primary and waterflooding production phases, to analyze the potential of carbon dioxide enhanced oil recovery in this field. Although no capillary pressure data were provided, it was considered necessary to analyze the impact of capillary pressure on production forecasts. Production results indicate the existence of larger permeability channels. CO2-EOR offers multiple benefits for a long-term production and capillary pressure is advantageous to oil production.