LAUSR

Surfactant flooding consists of the injection of a chemical added to water to reduce the interfacial tension of oil/water and alter the wettability of reservoir rock, producing larger quantities of residual oil. The aim of this study is to verify the sensitivity of oil recovery factor and oil breakthrough time to surfactants flooding parameters, such as surfactant concentration, initial water saturation, oil viscosity and injection rate. For this, we used the UTCHEM software, seeking to obtain a sensitivity analysis of these variables. Oil breakthrough time is the time at which the oil-water bank arrives at the producing well. From the obtained results it is noticed that for a lower initial water saturation, a higher recovery factor is generated. It has been demonstrated the existence of a critical water saturation, from which the oil breakthrough time begins to increase.