【摘要】 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。更多还原

【Abstract】 This article introduecs the mechanism of the influence to crude properties by external magnetic field,puts forward the model to calculate the influence to crude viscosity by external magnetic field. Calculation result shows that:the influence to crude viscosity by external magnetic field are different in various directions. When the external magnetic field direction are vertical to the crude flow direction,crude viscosity is decreasing and as temperature increases the viscosity decreasing rate dbcreases. When megnetic field intensity is smaller and temperature is higher than the crude pour point,theory is in accord with test result.When external magnetic field direction are parallel with crude flow direction,crude viscosity are ihereasing.更多还原