The global average oil recovery exceeds rarely 45% as after the primary and secondary recovery, a large amount of oil is left behind in the reservoir. This oil needs to be recovered to meet ever-increasing oil demand and to do so, several Enhanced Oil Recovery (EOR) technologies have been developed. This book focuses on surfactant-based enhanced oil recovery processes. Laboratory experiments and field projects have proved the efficiency of surfactant flooding in increasing the oil recovery. The purpose of this work is to apply a numerical simulation of surfactant flooding in a sector model from Edvard Grieg Field model to estimate EOR potential. The mechanisms of enhanced oil recovery by surfactant are discussed, and different designs of surfactant flooding are studied to optimize the project profitability.