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含蜡原油在从高温到低温的变化过程中 ,由于蜡晶析出而具有不同的粘弹特性。粘弹性的强弱与原油中的蜡晶浓度、蜡晶聚集状态和相互作用性质以及液态油的组成等所形成的流变结构有关。对中原和长庆原油的实验表明 ,原油在小振幅剪切振荡实验条件下粘弹性参数的大小及其特殊变化温度可以综合反映原油的流变结构随温度变化的特点 ,并可用于评价改性原油的改性效果。
Waxy crude oil has different viscoelastic properties due to the precipitation of wax crystals during the change from high temperature to low temperature. The strength of viscoelasticity is related to the rheological structure formed by the concentration of wax crystals in crude oil, the aggregation and interaction properties of wax crystals and the composition of liquid oil. Experiments on the Central Plains and Changqing crude oil show that the viscoelastic parameters of crude oil under small amplitude shear vibration experiment and its special temperature can reflect the characteristics of rheological structure of crude oil with temperature changes and can be used to evaluate the modification Crude oil modification effect.