摘要
南海某油田采用水下生产系统技术进行开发,其8口水下井通过回接13km外的现有油田设施进行生产,油田作业水深约300m。水下控制采用了复合电液控制系统,电、液、通讯信号等由现有生产设施通过一条约14 km长的脐带缆提供。该油田投产后不久出现了电力通讯缆绝缘电阻低的问题,1a后,该脐带缆中所有3根4芯电力通讯缆绝缘全部归零,失去了对水下井口远程操控功能。为了尽快修复故障,恢复水下操控,技术人员创新性地提出利用油田电潜泵供电用中压多芯电缆中3根备用电缆芯作为供电和通讯回路使用的方案。通过研究和分析,设计了特殊的水下电缆续接装置,将1条3芯中压电飞线输入转接为输出2条双回路低压信号电飞线,接入到原系统的水下电力分配模块中去,且满足100%的通讯回路冗余要求。通过原创技术研发成功完成了相关水下转接装置的研制和安装应用,恢复了对所有井口的远程控制,改造后的系统已稳定运行多年。
A subsea oil field located in South China Sea was developed in 2012.Its power supply and control system is via a 14 km subsea umbilical from a floating production platform which is about 12 km away.Electro-hydraulic multiplex control system is adopted to control a total of 8 subsea wells.The oil field subjected to an early pre-mature failure to its control system due to insulation resistance problems of the subsea umbilical’s electrical quads.An innovative design was conducted to use the oil field’s spare medium voltage ESP power cable triad in replace of the failed umbilical quads in order to restore the remote control.After research and analysis,special subsea splicing apparatus was designed and implemented to transit the three medium voltage cores flying lead to two low voltage flying leads which connect to the original subsea well head control system.A two channel with 100%redundant control requirement was achieved through the novel design.The innovative engineering and successful application of the splicing apparatus restored the remote operation control of subsea oil field,and the system has been operating steadily for many years.
作者
冒家友
刘浩
MAO Jiayou;LIU Hao(CNOOC China Ltd.Shenzhen Branch,Shenzhen 518000,China)
出处
《海岸工程》
2023年第1期1-12,共12页
Coastal Engineering
关键词
水下油田
通讯故障
水下续接
信号冗余
subsea oil field
communication failure
underwater cable interconnection
signal redundancy
