Viscosity Calculation Model Of Diluted Fengcheng Heavy Crude Oil And Its Application

With an increase of annual production of Fengcheng heavy crude oil in Xinjiang,parts of it need to be transported to Wangjiagou oil depot through Karamy-Wulumuqi pipeline because of progressing capacity constraints of local refinery.The viscosity of Fengcheng heavy oil is very large so it can't be transported by K-W pipeline directly,so light oil should be mixed in Fengcheng heavy oil for transportation.The key to longdistance transportation of mixed oil is getting precise data of heavy & light mixed oil viscosity.From the basis of viscosity testing experiment of Fengcheng heavy oil,Karamy light oil and Fengcheng-Karamy mixed oil,Cragoe modified model ? is preferred through 14 exisiting mixed oil viscosity calculation models for calculating the viscosity of Fengcheng-Karamy mixed oil.Comparing the calculated and tested viscosity,the average relative error is 8.65%.Due to defect of this model,a new viscosity calculation model is proposed in this paper.The new model provides a convenient method for engineering application.Based on the station locations of K-W D529 and K-W D377 pipeline,hydraulicthermal calculations were conducted for the two pipelines transporting FengchengKaramy mixed oil respectively,and the maximum flow capacity of K-W pipeline for different ratio of Fengcheng-Karamy mixed oil were determined.In addition,from the point of view of dynamic energy consumption,the writer optimizes the best ratio of Fengcheng-Karamy mixed oil,in combination with the production of heavy and light oil,puts forward a mixed oil transportation task and determines the economic transportation scheme.