稠油集输的困难主要表现在其流动性差,解决这一问题的关键是降低原油粘度,改善原油的流动条件。研究了稠油降粘的三管伴热流程,将热水管、回水管与集油管包裹在一起,形成换热体,可使集油管升温,稠油降粘,降低油井回压。建立了此种伴热方式的温度场模型,并结合实例分析了伴热效果。三管伴热流程比双管掺水流程减少了伴热用水量和污水处理量,也提高了热量的利用率。 The difficulty of heavy oil gathering and transportation is mainly manifested in its poor liquidity. The key to solving this problem is to reduce the viscosity of crude oil and improve the flow conditions of crude oil. The three-pipe heat transfer process of heavy oil viscosity reduction was studied. The hot water pipe, return pipe and oil trap were wrapped together to form the heat exchange body, which could make the oil pipe heat up, viscous heavy oil to reduce viscosity, and reduce oil well back pressure. The temperature field model of this heat tracing method is established, and the heat tracing effect is analyzed with examples. The three-pipe heat tracing process reduces the amount of heat tracing water and sewage treatment as compared with the double pipe blending process, and also improves the heat utilization.