关于海上油田SIS系统工作稳定性的探讨

Discussion on the Working Stability of SIS System in Offshore Oilfield

SIS系统是海上采油平台防范风险的最直接手段,SIS系统(包括ESD紧急停车系统和FGS火气系统)的非计划停机不仅对产量有严重影响,还给现场安全生产带来严峻的考验。2019年,某海上平台SIS系统中ESD子系统发生三次故障停机,对海上油气生产造成严重影响。为解决现场发生的ESD系统主备CPU同时故障停机问题,通过分析ESD系统供电能力及带载能力,建立现场ESD系统功率评估模型,研究ESD系统主备CPU同时故障停机的概率与扫描周期的关系以及海上油田ESD系统不停产升级方法。在油田现场进行实际改造和调整,SIS系统稳定性得到提升,从2020年初至今,未再次发生ESD系统主备CPU同时故障停机。相比2019年,直接提升生产时效3 h,减少停产原油产量损失1500 m^(3),降低直接经济损失300万元。

The SIS system is the most direct means to prevent risks for offshore oil production platforms.The unplanned shutdown of the SIS system(including emergency shutdown system and fire gas system)not only has a serious impact on production output,but also poses a severe challenge to on-site safety production.In 2019,the ESD subsystem of a certain offshore platform's SIS system experienced three fault shutdowns,which seriously affected offshore oil and gas production.In order to solve the problem of simultaneous shutdown of main and standby CPUs in the ESD system,by analyzing the power supply capacity and load capacity of the ESD system,the power evaluation model of the on-site ESD system is established,the relationship between the probability of simultaneous shutdown of the main and standby CPUs of the ESD system and the scanning period is studied,and the method of upgrading the offshore oilfield ESD system without stopping production is researched.After practical transformation and adjustment on the oilfield site,the stability of the SIS system has been improved.Since the beginning of 2020,no simultaneous shutdown of the main and standby CPUs of the ESD system has occurred again on the oilfield site.Compared with 2019,the production efficiency is directly increased by 3 hours,the loss of crude oil production due to shutdown is reduced by 1500 m^(3),and the direct economic loss is reduced by 3 million yuan.