The heterogeneous compound system can realize coordination of profile regulation and oil displacement，which has great potential in heavy oil recovery. However，the contribution of its components to oil flooding is not clear，which brings blindness to the optimization and selection of oil flooding system. For a heterogeneous compound system，consisting of partially hydrolyzed polyacrylamide，dual-effect surfactant and branched performed particles gel（B-PPG）），based on the analysis of its interfacial， plugging properties and oil flooding characteristics，flooding experiments of polymer，compound system and heterogeneous compound system were carried out. According to the oil recovery increments obtained by those three types of systems，the contribution of components in heterogeneous compound system on oil displacement under different water-oil viscosity ratios was calculated by normalization. The results showed that a B-PPG sample with initial size of 0.106—0.150 mm（150—100 mesh） behaved a median particle size of 800 μm after expansion. The corresponding heterogeneous compound system matched with a sand pack with a permeability of 1.1 μm²，where its measured resistance and residual resistance factor was 420.5 and 203.0. When a sand pack with lower permeability of 0.3 μm² was encountered，it could not be injected. For a parallel sand pack with a permeability contrast of about 3.0，heterogeneous compound system performed strong profile-control capacity. The maximum injection pressure was 0.42 MPa，and then the maximum fractional flow in low permeability model was 42.2%. While those of the single compound system were only 0.25 MPa and 24.3%，respectively. Under water-oil viscosity ratios of 0.05—0.46，the polymer component made the highest contribution to oil recovery of 43.1%—84.1% in heterogeneous compound system，the surfactant did the lowest of 22.1%—7.6%，while the B-PPG was intermediate of 34.8%—8.3%. At high water-oil viscosity ratios（≥0.46），the contribution of surfactant and B-PPG was small，and the oil recovery potential of heterogeneous compound system after polymer or compound flooding was limited. When the water-oil viscosity ratio（≤0.2）was low，the contribution of surfactant and B-PPG particles got large，and the oil recovery potential of heterogeneous compound system after both water and polymer/compound flooding was great.