陵水25-1深水气田混输管道距离长、管道爬坡段坡度大,初始投产阶段混输流体水相到达平台的时间长且预测困难,给管道安全运行带来风险。基于多相流计算模型,运用LedaFlow软件,对陵水25-1深水气田初始投产阶段的水相运动规律进行研究,并深入分析含水率、油量、气量、油水相间摩擦系数等因素对水相运行的影响。结果表明：初始投产阶段水相在爬坡段分离和积聚,形成长时间的停滞,管道坡度越大,水相波动越剧烈；含水率越高的物流,水相在爬坡段聚集时间越短；气量增大则会降低水相滞液程度,提高水相运行速度,有助于水相爬坡；油量变化对水相运行速度的影响较小，油水相间摩擦系数对爬坡段水相运动有直接影响,油水相间摩擦系数修正拟合,对实际管道运行有重要指导意义。研究结果可为深水气田开发研究提供借鉴。

The LS25-1 deep-water gas field, with its long-distance pipeline and steep climbing sections, presents challenges in predicting the arrival time of the water phase of multiphase fluid, posing risks to pipeline flow assurance. Based on the multiphase flow equation, LedaFlow software was used to study the water phase movement in the initial startup stage of the deep-water gas field and to analyze the influence of water cut, oil flow rate, gas flow rate and oil-water interface friction coefficient. The results indicate that during the initial start-up stage, water can separate and accumulate in the uphill regions, creating pools of water that are essentially stagnant. In regions with larger pipeline slopes, the water phase experiences violent fluctuations. A higher water content in the fluid leads to shorter accumulation times in uphill regions; an increase in gas flow rate can diminish water phase stagnation and expedite water movement in these areas; Variations in oil volume have a relatively low impact on the movement of the water phase. Oil-water interface friction coefficient has a direct impact on water phase accumulation in the uphill section and precise adjustments to this coefficient are of significant guiding importance for actual pipeline operations. This research result can provide a reference for the development of deep-water gas fields.