A preliminary enhanced oil recovery (EOR) screening was completed for the Ben Nevis Formation, Hebron Field, offshore Canada. Polymer flooding was determined to be the most viable methodology based on the oil and reservoir properties and known challenges with respect to sourcing potential injection gas. Digital image analysis and microscopic petrographic analysis were applied to investigate the pore system characterization in Ben Nevis formation sandstone cores, which were subjected to an experimental polymer injection at 62 degrees C. Polymer Flopaam 5115 delivered the best performance in terms of oil recovery irrespective of the flooding sequence or permeability facies. Initial grain size before flooding has a profound impact on oil displacement efficiency. Pore network analyses before and after flooding indicate that the movement of fine grains potentially affects porosity postflooding, depending on the permeability facies.