Analysis on influence of gathering and transportation technology on the effect of pour point depressant in high wax crude oil

The gathering and transportation technology of high-wax crude oil has a great influence on reducing the viscosity and pour point of oil.Jilin Munan crude oil is depressed by pour point depressant AE,and the influences of the dosage of pour point depressant,adding temperature,high-speed shearing of pump,repeated heating and cooling rate in gathering and transportation process on the effect of pour point depressant are researched.Experimental results show that the optimal conditions are as follows: additive dosage of pour point depressant is 0.7%,adding temperature is 70 ℃,the temperature of high-speed shearing is at least 10 ℃ higher than wax precipitation point,the repeated heating temperature should not be lower than 60 ℃,the cooling process should be slow down in the 55~40 ℃wax crystallization peak area.