The objective of this year's work is to develop more effective surfactant flooding systems that have broader tolerance to chemical composition in reservoirs. The focus is to mitigate problems that have been shown to have adverse effects on the performance and economics of surfactant flooding processes, to improve the economics of surfactant-enhanced oil recovery through the development of effective oil recovery systems that contain very low concentrations of synthetic surfactants and alkaline additives, and to investigate the application or extension of current chemical flooding technology to near-term problem solving for near-wellbore permeability improvement.