塔雅重质原油管道加剂增输运行方案

Throughput increase program for Taku-Yakela Heavy Crude Oil Pipeline

塔雅管道是连接塔库和雅克拉的原油管道,承担着塔库重质原油的外输任务。根据生产需求,塔雅管道的年输量需要增输约15%,为此添加减阻剂提高输量运行。重质原油粘度大,其管流雷诺数较低,需要适当提高管道运行温度,以期将管流雷诺数提高到10000以上,为减阻剂发挥性能提供条件。减阻剂在油流中分散需要一定时间,难以全程发挥减阻作用,加剂油品流经塔雅管道全程仅需不到6h,发挥作用的管段可能不足1/3,应充分考虑减阻剂的分散性能制定加剂运行方案。(表2,参10)

Taku-Yakela pipeline is the crude oil pipeline between Taku and Yakela to bear the output of heavy crude oil from Taku. Annual output of the Taku-Yakela Pipeline needs a 15% increase based on actual running target, so it is requited to inject DRA for the increase. Due to high velocity of heavy crude oil, pipe flow follows a lower Reynolds number. It is required to appropriately improve pipeline operating temperature in order to reach a Reynolds number of more than 10 000, thus providing conditions for DRA to express its function. DRA needs some time for distribution in the oil flow, so it is difficult for them to play a drag reduction in the whole process. Oil with DRA added only take the time of less than 6 hours to flow through the whole Taku-Yakela Pipeline, but the Pipeline section of less than 1/3 can follow the drag reduction. Therefore, an additive operation program shall be set up in full consideration of DRA＇s dispersibility. （2 Tables, 10 References）