移动注热平台栈桥蒸汽管线设计方案  

Design Scheme for Bridge Steam Pipelines of Moveable Steam Injection Platform

作　　者：王春霞 雷俊杰 郝孟江 陈修辉 纪志远 WANG Chunxia;LEI Junjie;HAO Mengjiang;CHEN Xiuhui;JI Zhiyuan(Design Institute,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设计院,天津300451

出　　处：《中国海洋平台》2023年第6期85-90,96,共7页China offshore Platform

摘　　要：渤海某区块油田开发项目拟采用一种新型稠油热采模式,即建造一座可移动注热平台,通过栈桥与热采平台连接,交替为多个热采平台提供合格的蒸汽。热采平台受风、浪、流等因素的影响会产生相对运动,使生根在栈桥上的蒸汽管线发生拉伸、压缩或扭曲。与常规蒸汽管线或栈桥管线设计相比,移动注热平台的栈桥蒸汽管线设计难点如下:高温高压蒸汽不能采用软管连接,只能采用硬管连接;平台运动引起的栈桥位移产生的位移应力及大位移引起的支架脱空导致持续应力超标;注热启停温度变化、波浪随机运动造成的位移变化使管线产生交变应力,逐步累积使管道发生疲劳破坏。结合ASME B31.3与DNV规范,基于CAESARⅡ应力分析软件对蒸汽管线进行详细的静态分析和疲劳分析,解决上述难点,论证可移动注热平台通过栈桥为热采平台输送蒸汽的可行性。A new heavy oil thermal recovery mode is proposed for an oilfield development project in Bohai Sea,to build a moveable steam injection platform,which is connected with the thermal recovery platform through bridge,and alternately provide qualified steam for multiple thermal recovery platforms.The steam pipeline will be stretched,compressed or twisted duo to relative movement of platforms caused by wind,wave,current and other factors.Therefore,compared with the conventional design of steam pipeline or bridge pipeline,the design difficulties of the bridge steam pipeline of the moveable steam injection platform are:high temperature and high pressure steam can not be connected by flexible hose,but only by steel pipe;large bridge displacement will cause large displacement stress and large sustained stress;alternating stress,which is produced by temperature change and displacement change duo to random wave movement,gradually accumulates,resulting in fatigue failure of the pipeline.Combined with ASME B31.3 and DNV specifications,and based on CAESARⅡstress analysis software,detailed static analysis and fatigue analysis of the steam pipeline are carried out.The above difficulties are solved,and the feasibility of transporting steam for thermal recovery platform through movable platform and bridge is demonstrated.

关 键 词：移动注热平台 稠油热采 疲劳分析 栈桥蒸汽管线 

分 类 号：TE95[石油与天然气工程—石油机械设备]