Abstract: Aiming at the characteristics of the existence of many heavy oil fields and oilfields with high moisture content in our country, conducting numerical simulation with the use of VOF multiphase flow model on twophase oilwater flows in horizontal Ttube which are common on gathering pipeline network. Under given conditions, the moisture content in medium heavy oil was 80%, the flow rate was 1.5 m/s, the simulation results show that the twophase oilwater flow belongs to the pattern of oilinwater dispersed flow, the water plays the role of the basic phase and oil as the dispersed phase. The pressure in the trunk pipeline before branch reduces at the linear rate of 300 Pa/m, the pressure increases in the branch section, then decreases linearly with the flow, analyzed the mechanism of pipeline pressure drop in the branch pipeline. The results will play an important role in optimizing network structure, designing reasonable parameters of pipeline, controlling pipeline corrosion and protecting pipelines. 

Key words: Horizontal Ttube,    ,  Twophase flow of oilwater,     , Medium heavy oil,   ,  VOF model

摘要： 针对我国稠油油田较多和油田含水率高的特点,运用VOF多相流模型对地面集输管网中较为常见 的水平T型管内油水两相流流动进行数值模拟。给定条件下中质稠油含水率为80%,流速1.5m/s,模拟结果为油水两相流属于水包油型分散流型,水作为基本相,油为分散相。分支前主管段内压力值以300Pa/m 的速率线性减小,分支处主管段内压力值有所增大,而后随着流动线性减小,分析了支管段内油水两相流的压力降机理。研究结果对于优化管网结构、合理设计管道参数、管道腐蚀与防护具有重要作用。

关键词: 水平T型管,    , 油水两相流,   , 中质稠油,    , VOF模型