中文摘要：

针对埋地含蜡原油管道停输后温降的变化过程,建立直角坐标系下埋地热油管道及其周围土壤传热的物理模型;考虑原油物性、土壤温度随深度和时间的变化规律,建立原油、管道和土壤耦合传热的数学模型。模拟管道在不同土壤导热系数、不同环境温度和不同初始油温情况下停输后的土壤温度场分布变化情况。模拟结果表明：不同季节停输后土壤的温度场分布呈现不同的趋势,且越靠近管道的土壤区域,温度场分布受管道影响越大。

英文摘要：

This paper is aimed at the change process of buried waxy crude oil pipeline temperature drops after shutdown, the physical model under the rectangular coordinate system of buried oil pipeline and the heat transfer in the surrounding soil are established. Taking physical property of crude oil, change law of soil temperature with depth and time into consideration, the mathematical model for coupled heat transfer of crude oil, pipeline and soil is established. The distribution law of soil temperature field under different conditions can be obtained by simulating the soil temperature distribution situation under different thermal conductivity of soil, ambient temperature and initial oil temperature. The result shows that the temperature distribution is influenced by season changing, and the temperature distribution of the soil near the pipelines could be influenced more greatly.