异径T型海底天然气管道排水干燥方案研究  

Study on draining and drying scheme for T-type subsea natural gas pipeline with different diameters

作　　者：谭红莹 高铭志[1] 雷震名[1] 司红涛[1] 刘健[1] TAN Hongying;GAO Mingzhi;LEI Zhenming;SI Hongtao;LIU Jian(Offshore Oil Engineering Co.,Ltd.,Tianjin,300451,China)

机构地区：[1]海洋石油工程股份有限公司,天津300451

出　　处：《天然气与石油》2022年第2期27-31,共5页Natural Gas and Oil

基　　金：海洋石油工程股份有限公司科研项目“东方13-2气田群海上平台安装及海底管缆铺设”(C-0817005)。

摘　　要：对于异径T型海底天然气管道,常规的排水干燥方案无法实施。针对实施难度大的问题,依托南海气田管网项目,分析了异径T型海底天然气管道布置特点,提出了干气吹扫排水干燥方案和干气吹扫排水加TEG干燥方案,并对两种排水干燥方案进行了技术论证,从技术可行性、实施复杂度、经济性、环境保护、风险性等角度综合比较分析,最终推荐使用增大干气吹扫量排水干燥方案,给出具体实施方案和技术要求,为后续类似海底天然气管道项目制定排水干燥方案提供借鉴。For the T-type subsea natural gas pipeline of different diameters,the conventional draining and drying procedure cannot be implemented.To address this problem,based on gas field pipeline network project in the South China Sea,this study first analyses the layout characteristics of that T-type subsea gas pipeline before proposing two schemes of draining and drying the pipeline;namely draining and drying with dry gas purging,and draining with dry gas purging follow by TEG drying respectively.These two schemes are compared and evaluated from the perspectives of technical feasibility,implementation complexity,economics,environmental protection and risks.Finally,it is recommended to adopt the increased dry gas purging volume as the optimal scheme for draining and drying subsea pipeline,and specific implementation plan and technical requirements are also given to provide reference for development of draining and drying schemes for similar subsea natural gas pipeline projects in the future.

关 键 词：天然气管道 异径T型海管 排水 干燥 通球 吹扫 

分 类 号：TE973.92[石油与天然气工程—石油机械设备]