摘要
三相分离器是海上油气田开发中一种重要的油气水分离设备,合理设定分离器压力尤为关键。选取A、B两个海上平台的三相分离器为研究对象,采用K-Spice软件搭建符合现场运行情况的工艺动态仿真模型。对分离器气相出口管道堵塞、气相出口管道调节阀故障卡住两种情况下分离器内压力的变化进行了模拟,并与国内外行业标准推荐的压力设定值进行了对比。结果表明:常用的高高压力关断设定值偏低,分离器可能因气相出口调节阀故障卡住导致油田停产,且在气相出口堵塞情况下可能存在分离器一级保护措施(关断阀关闭)与二级保护措施(安全阀泄压)相互不独立的问题。提出一种新的压力设定方法:根据气相出口管道调节阀故障卡住时分离器内的压力波动值,确定高高压力关断设定值的最小值;根据气相出口堵塞情况下分离器的压力变化,确定安全阀设定压力的最小值。三相分离器压力设定新方法,可避免分离器调节阀故障卡住带来的“生产关断”问题,同时可确保分离器的一级保护与二级保护相互独立。
Three-phase separator is an important device used in the development of offshore oil and gas fields to separate the oil,gas and water,for which proper pressure setting value is very critical.Herein,three-phase separators of A and B offshore platforms were taken as the object of research,and a dynamic simulation model of process was established based on the field operation conditions with K-Spice software.Specifically,the internal pressure change of the separators was simulated under two conditions,i.e.the gas outlet pipeline blocked and the control valve on the gas outlet pipeline of the separators stuck,and comparison was also made with the pressure setting value recommended by the domestic and foreign industry specifications.The results indicate that:For the setting value of high-high pressure for shutdown is low,the sticking of control valve at the gas outlet of separator may result in the shutdown of oil fields,and under the condition that the gas outlet is blocked,the problem concerning the non-independence of primary protection measure(close the shutoff valve)and the secondary protection measure(open the safety valve for pressure relief)may occur.Therefore,a new method of pressure setting was proposed,that is,to determine the minimum setting value of high-high pressure for shutdown according to the fluctuation value of internal pressure of the separator with the control valve on the gas outlet pipeline stuck,and to determine the minimum value of the setting pressure of the safety valve according to the pressure change of separator with the gas outlet blocked.The new method for pressure setting of three-phase separators can avoid the problem of“production shutdown”caused by the sticking of control valve of the separator and ensure the independence of the primary and secondary protection measures of separators.
作者
马晨波
刘向东
刘人玮
曹杨
黄喆
MA Chenbo;LIU Xiangdong;LIU Renwei;CAO Yang;HUANG Zhe(CNOOC Research Institute Co.Ltd.)
出处
《油气储运》
CAS
北大核心
2021年第12期1401-1408,共8页
Oil & Gas Storage and Transportation
基金
国家重点研发计划子课题“水下生产系统方案研究”,2016YFC0303701。
关键词
海上油气田
三相分离器
压力设定
K-Spice
动态模拟
offshore oil and gas fields
three-phase separators
pressure setting
K-Spice
dynamic simulation
