(217ae) Rheology & Thermal Stability of Ethoxylated Surfactants and Polymers Systems Used for Enhanced Oil Recovery in Carbonate Reservoirs

In this study, the interaction between ethoxylated surfactants and polymers is investigated for enhancement of oil recovery in carbonate reservoirs. Surfactants and Polymers (SP) are used in the Enhanced Oil Recovery to increase the sweep efficiency by increasing the viscosity of the water and decreasing the interfacial tension between water and oil. Different SP formulations were evaluated under different conditions of temperature and salinity. Effect of different types of surfactants and polymer systems on the rheology and thermal stability will be assessed and the best formulation will be recommended. The optimum conditions of salinity and temperature will be determined for the given SP system. The rheology of the different SP formulations will be measured to examine the influence of the saline environment on viscosity. SP systems that show the highest thermal stability and lead to the highest improvement in viscosity and the lowest values of interfacial tension will be selected for further evaluation.