Experimental studies show that under special conditions, oils in corrosion environment have some inhibiting effect on CO2 corrosion behavior of gathering pipelines. Oil wetting and corrosion product film are the great difference in existent rate prediction models of sweet corrosion. The progress of CO2 corrosion rate prediction including empirical model, semi-empirical model, mechanistic model and artificial neural networks model considering the impact of oil in recent years are introduced in detail, the present problems and further research directions are also discussed.