Abstract: A kind of stable O/W emulsion was prepared in the laboratory.Seepage experiments of this emulsion in homogeneous cylindrical core with the length of 30 cm were carried out to simulate the seepage process of emulsion in reservoir beds with separate permeability.The experimental results showed that the emulsion with particles of 3.673 μm average diameter can be injected into deep of the core.In the cores with permeability from 0.6 to 1 μm²,the emulsion has good property both in profile control and injection.When the ratio of average diameter of emulsion and average diameter of core is less than 0.33,the property of injection is well.When the ratio of average diameter of emulsion and average diameter of core is larger than 0.33,as the ratio increases,the property of injection decreases quickly.

Key words: emulsion, injection, permeability, particle size match, resistance coefficient