The changes of pressure and saturation, the production characteristics and distribution of remaining oil about low tension foam system under simulated reservoir condition of Shengli oilfield were studied by sand-pack and consolidated physical models. The results showed that the low tension foam flooding could increase the injection pressure of whole model, and improve the formation heterogeneity through profile control and fluid division. It was found that as the gas floating effect could be ignored in the early stage of foam injection, due to the viscous and capillary force, the low tension foam was mainly in the middle and lower parts of the model and the pressure in middle and lower parts was relatively a little higher. But at the later stage, foam distributed evenly in the model and could be displaced like a piston under the comprehensive effect of gas floating and viscous forces. As a result, the pressure changed more gently. Remaining oil mainly gathered in the outlet of the model, and the displacement efficiency near the inlet of the model was the best. Under the charge of the displacement of low tension foam, and in combination with gas buoyancy and oil washing effects, oil was mainly recovered at the initial stage of subsequent water flooding, and finally the integrated oil recovery was increased by 28.92%. Furthermore, the displacement efficiency in high and low permeability layers was much better.