基于SimulationX的深水水下液压系统低压充压及闸阀操作工况仿真分析

Simulation and Analysis of Low-Pressure Charging and Gate Valve Operation of Deepwater Subsea Hydraulic System Based on SimulationX

针对我国南海某大型气田开发项目,进行水下液压系统低压系统充压工况的仿真分析,比较应用不同尺寸脐带缆时充压过程所需要的时间,从而确定适用于该项目的脐带缆尺寸。同时,针对水下控制模块(SCM)选取不同规格的蓄能器,对采油树5-1/8英寸(1英寸≈2.54cm)闸阀进行开关仿真操作,从而仿真出阀门开启和关闭全程所需时间、SCM的供油压力变化值、闸阀执行器弹簧腔压力变化值等参数。将仿真结果与设计标准指标进行比对,不仅有助于脐带缆和蓄能器的合理选型,还可为项目投产后水下液压系统的安全可靠运行提供保障。

For a gas field project in the South China Sea, simulation and analysis are carried out for the low-pressure charging of the subsea hydraulic system through the comparison of charging time for umbilicals with different sizes, so as to determine the appropriate umbilical size. At the same time, selecting different sizes for the accumulator of the subsea control module （SCM）, simulating the opening and closing processes of the 5-1/8 inch gate valve of Christmas tree, we can get the operation duration, the pressure differential of SCM, and the pressure change of gate valve actuator. Comparing the simulation results with the design standard, one can get useful guide for the selection of umbilical size and accumulator capacity, and even helpful information for ensuring the safety and reliability of the subsea hydraulic system in actual operations.