利用PIPESIM流体计算软件对影响原油管道总传热系数的因素进行模拟分析，确定了保温层厚度、保温材料导热系数、管径、原油含水率、原油流速、管道埋深、管道埋深处地温、土壤导热系数为影响管道总传热系数的主要因素；总传热系数随着管道保温层厚度、管径、管道埋深和管道埋深处地温的升高而降低，随着土壤导热系数、保温材料导热系数、原油含水率和原油流速的升高而增大；对于保温管道，各种因素对管道总传热系数影响程度大小顺序为：保温层导热系数、保温层厚度、管径、土壤导热系数、管道埋深、原油含水率、原油流速、埋深处地温。

The factors affecting the overall heat transfer coefficient of crude oil pipeline are simulated by PIPESIM software.The thickness of thermal insulation layer,the thermal conductivity of thermal insulation materials,the pipe diameter,the moisture content of crude oil,the flow rate of crude oil,the buried depth of pipeline,the underground temperature and the thermal conductivity of soil are identified as the main factors influencing the overall heat transfer coefficient of pipeline.The overall heat transfer coefficient will decrease with the increases of the thickness of insulation layer,the pipe diameter,the buried depth and the underground temperature,and will increase with the increases of the thermal conductivities of both soil and thermal insulation materials,moisture content in crude oil and the flow rate of crude oil.For thermal insulation pipeline,the influencing degrees of these factors on the overall heat transfer coefficient of crude oil pipeline turn lower in the following order:the thermal conductivity of thermal insulation materials,the thickness of thermal insulation,the pipe diameter,the thermal conductivity of soil,the buried depth of pipeline,the moisture content in crude oil,the flow rate of crude oil and the underground temperature where the pipeline locates at.