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The studied field is a field with the characteristics of light oil reservoir. To increase the oil recovery will be applied surfactant injection in this field. In this study the type of surfactant that will be used is Sodium Lignosulfonate (SLS) surfactant using formulations. The surfactant formulations conducted by adding Sodium Oleate and Ethylene Glycol Butyl Ether (EGBE) in variation concentration. The research conducted is a laboratory study with core flooding test and wettability test using Berea sandstone with variation of SLS surfactant concentrations. The core flooding test results will provide the largest recovery factor from SLS surfactant formulations with various concentrations. The same thing will be done on wettability test. It will be observed changes in the reservoir fluid contact angle at various formulated SLS surfactant concentrations. This study aims to determine the change in wettability of rocks that occur after the injection of SLS surfactant before and after the formulation. Furthermore, formulations and concentrations of surfactants can be selected which produce the greatest recovery to be applied to the field.