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Abstract
As energy demand increases in the world and oil cost rises in turn, tertiary recovery methods become more important than before. One of the main challenges in surfactant flooding process, used as a chemical based method, is the surfactant adsorption phenomenon. Sodium dodecyl sulfate is used in this study as the surfactant agent and is mingled by water wet nanoparticles (AEROSIL 200) in order to investigate effects of nanoparticles on amount of surfactant adsorption as well as increase in oil recovery from a sandstone core belonging to one Iranian reservoir. Results show that inclusion of nanoparticles decreases the surfactant adsorption and thereby increasing the oil recovery in sandstone cores.