Abstract: A dynamic wax deposition model for Jienuo crude oil was established through laboratory wax deposition experiments. With safe operations ensured, taking the sum of average daily power and pigging costs（average daily costs of pipeline operation） as the objective function, a pigging frequency model for unheated oil pipelines was developed. Based on the operation data of Linyi-Zhaozhaizi stations in Linyi-Puyang pipeline, the influence of outlet temperature, throughput and soil temperature on optimized pigging frequency were analyzed. The results show that the average daily costs of pipeline operation will be increased while the pigging frequency will be extended with decreasing of the outlet temperature. The average daily costs of pipeline operation will be increased while the pigging frequency will be shortened with rising of the throughput, and the average daily costs of pipeline operation will be decreased first and then increased while the pigging frequency will be extended with increasing of the soil temperature.

Key words: Model of wax deposition,    , Unheated oil pipeline,    , Wax deposition,    , Pigging frequency

摘要：         通过室内蜡沉积实验,建立了适用于杰诺原油的蜡沉积模型,并在满足安全运行的基础上,以日平均动力费用及日平均清管费用的总和即日平均运行成本为目标函数,建立了不加热输油管道的清管周期模型。结合临濮线临邑至赵寨子的站间运行数据,分析了不同出站温度、输量和季节对管道最佳清管周期的影响。结果表明,出站温度的降低会使管道日平均运行成本增加和最佳清管周期延长,输量的增加会使管道日平均运行成本增加和最佳清管周期缩短,地温的升高会使管道日平均运行成本先减小后增大,最佳清管周期延长。

关键词: 蜡沉积模型,   ,  不加热输油管道,    ,  蜡沉积,    ,  清管周期