Well test verification of the technical potential for improved oil recovery by surfactant flooding in the Gullfaks Field

The residual oil saturation of 0.35-0.40 after waterflooding in high quality Brent sands in the Gullfaks Field constitutes an excellent opportunity for improving the oil recovery by surfactant flooding. In order to assess the technical potential for improved oil recovery, Statoil decided in 1989 to initiate a surfactant flooding development program for Gullfaks application comprising: surfactant production, characterization, screening and optimization.