In order to probe the real migration role of the polymer and polymer/ surfactant binary compound flooding system，two 15 meter core models with oil sand of J oilfield were established，and the binary compound flooding system，composed of 1200 mg/L polymer 3640，a acrylamide/acroleic acid copolyler with relative molecular weight of 2000×10⁴ and hydration degree of 20%，and 1200 mg/L surfactant HDS，a complex of sodium alpha-olefin sulfonate and surfactant APG，and polymer flooding（1200 mg/L polymer 3640） displacing experiments were carried out under the condition of 57℃ and monitored by measurement of the concentration and viscosity of the samples obtained during displacing process at different pressure monitoring nodes. The results showed that polymer concentration and viscosity of two systems reduced with migration distance increasing and the viscosity lost more. Compared with polymer flooding，the binary compound flooding system had lower injection pressure and the enhanced oil recovery was 4.94% higher. Lower interfacial tension between the binary compound flooding system and the simulated oil maintained half of the distance，and finally it was close to that of polymer flooding. The binary compound system could form the stable emulsion with the simulated oil，when injected into the core. With the increase of migration distance，the adsorption loss of surfactant would lead to demulsification and coalescence of the emulsion. The migration rule based on the super-long core would provide effective parameters to guide the following scheme optimization and adjustment.