Abstract: After the exploration and development for nearly thirty years,Huanghekou depression has come into a higher level of exploration,with an accumulation reserve of 5.95×10~8 m~3.In the recent years,along with the rise of exploration risks,the scale of residual petroleum resources in the depression is drawing more and more attention.The oil field order method is applied into the evaluation of remaining resources, and the result shows that there are still 88-146 oil fields with the scale of undiscovered reserves more than 180×10~4 m~3,and the total remaining resource reserve are about (6.57-7.43)×10~8 m~3.Finally,on the basis of the number of source rocks,the contact relationship between the tectonic belt and its source rock and the migration distance of hydrocarbon, the areas of favorable hydrocarbon accumulation are classified and predicted.