Research on a novel nanocomposite pour point depressant suitable for crude oil gathering and transportation
In order to improve the collection and transportation efficiency of waxy crude oil and effectively reduce the risk of wax deposition blocking the collection and transportation pipelines,a novel nanocomposite pour point depressant PSO-T was prepared by solution blending method using modified nano silica and polymer pour point depressant PSM as raw materials.The preparation conditions were optimized using the pour point of crude oil as the evaluation index,and the pour point and viscosity reduction effects of PSO-T on crude oil were evaluated.The results showed that when the amount of modified nano silica was 10％,the reaction temperature was 70 ℃,and the reaction time was 6 hours,the new nano composite pour point depressant PSO-T prepared had the best pour point depression effect on the target crude oil.As the dosage of PSO-T gradually increases,the pour point and viscosity values of the target crude oil show a trend of"first decreasing and then increasing".The recommended optimal dosage of PSO-T is 0.15％,which can reduce the freazing point of the target crude oil to-14.5℃and viscosity to 12.8 Pa·s.In addition,PSO-T has strong anti-aging ability.After 60 days of aging,the freezing point of the target crude oil can still be reduced to-11.4 ℃,and the viscosity can be reduced to 18.3 Pa·s.The effect of pour point and viscosity reduction is obvious.
gathering and transportation of waxy crude oilmodified nano silicacomposite pour point depres-santfreezing pointviscosity
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