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介绍外磁场对原油性质影响的机理，提出了计算外磁场对原油粘度影响的模型。计算结果表明：外磁场对原油粘度的影响是各向异性的，当外磁场方向与原油流动方向垂直时，原油的粘度是下降的，且其降粘率随温度的升高而降低，在场强较小时，且温度高于原油凝固点的温区，理论与实验结果相符。当外磁场方向与原油流动方向平行时，原油的粘度是增高的。
The mechanism of the effect of external magnetic field on the properties of crude oil is introduced, and the model of calculating the influence of external magnetic field on the viscosity of crude oil is proposed. The calculated results show that the influence of external magnetic field on the viscosity of crude oil is anisotropic. When the direction of external magnetic field is perpendicular to the direction of crude oil flow, the viscosity of crude oil decreases and the viscosity decreasing rate decreases with increasing temperature. Strong and small, and the temperature is higher than the freezing point of crude oil temperature, the theory and experimental results. When the direction of the external magnetic field is parallel to the direction of the flow of crude oil, the viscosity of the crude oil is increased.