Abstract: Starting from the downstream of the oil refining enterprises, the problem of crude oil storage and transportation scheduling was studied, and a downstream constraint planning model of the oil refinery was innovatively constructed. On the basis of the traditional crude oil scheduling constraints, the logical constraints of upstream resource quantities including the unloading resources of oil tankers were added. Combined with the operational characteristics of delayed transportation in long-distance pipelines, a downstream crude oil scheduling scheme considering upstream resource constraints for the oil refinery was formed. The established model was solved through a case study. The results show that the model has a significant advantage in solving efficiency. Feasible scheduling schemes were obtained within 0.6 to 1.7 seconds under different time period divisions. Taking the division of a 10 days scheduling cycle into 11 time periods as an example, the first feasible scheduling scheme was obtained in 0.64 seconds. This scheme ensures that the downstream production is carried out within the range of upstream resource supply and fully matches the operational characteristics of long-distance pipelines. During the scheduling cycle, the two sets of atmospheric and vacuum distillation units maintained continuous and stable operation, with only one oil type switch for each.

Key words: crude oil scheduling, constrained programming, upstream-downstream connectivity, long-distance pipelines