关键词: 阿赛线  ,  , 蜡沉积 ,  , 清蜡方式 ,  , 优化

Abstract: At present, the operating inlet oil temperature to the pump station along Asai pipeline is much higher than the gel point of the crude oil. And the pigging frequency is much higher. There is much waxes removed from the pipeline during the pigging operation. It not only blocks the inlets of heating furnace, but also consumes more thermal energies. In this paper, the wax deposition profiles of the crude oil along Asai pipeline at different inlet temperatures under normal conditions were predicted by using the unified wax deposition model, and also the wax deposition distribution under the condition from damaging thermal insulation was also examined. The prediction results show that the wax deposit mainly accumulated in the inlets of the pump stations. On this basis, a new pigging program involving pigging frequency was proposed, and the same time the inlet oil temperature was also optimized to be a lower value. In winter, the inlet oil temperature is advised to be 40 ℃.While in other seasons, the temperature is 35 ℃. The prediction results were compared with the field data, the relative average error is 9.49%.

Key words: Asai pipeline,    ,  Wax deposition,   ,  Wax removal,   , Optimization