内孤立波作用下深水锚泊平台-隔水管耦合系统动力学特性  

Dynamic characteristics of deepwater mooring platform-riser coupling system under internal solitary wave

作　　者：刘秀全 陈国明 畅元江 姬景奇 傅景杰 张浩[2] Liu Xiuquan;Chen Guoming;Chang Yuanjiang;Ji Jingqi;Fu Jingjie;Zhang Hao(Centre for Offshore Engineering and Safety Technology,China University of Petroleum,Shandong Qingdao 266580, China;China Ship Scienti fic Research Center,Jiangsu Wuxi 214082, China)

机构地区：[1]中国石油大学海洋油气装备与安全技术研究中心,山东青岛266580 [2]中国船舶科学研究中心,江苏无锡214082

出　　处：《石油学报》2017年第12期1448-1456,共9页Acta Petrolei Sinica

基　　金：国家重点基础研究发展计划(973)项目"深水海底井口-隔水管-平台动力学耦合机理与安全控制"(2015CB251203);教育部长江学者创新团队发展计划"海洋油气井钻完井理论与工程"(IRT14R58);国家自然科学基金项目(No.51239008);山东省自然科学基金联合专项(ZR2014EL018);中央高校基本科研业务费专项资金项目(17CX02025A)资助

摘　　要：中国南海内孤立波自然环境频发,内孤立波下深水锚泊平台-隔水管系统动力学失效风险高,为此建立了内孤立波下的深水锚泊平台-隔水管耦合系统动力学模型及分析方法,开发了深水锚泊平台-隔水管耦合系统动力学求解器,开展内孤立波下深水锚泊平台-隔水管耦合系统动力学特性分析,识别内孤立波下深水锚泊平台与隔水管系统的动力响应、耦合作用规律以及隔水管系统安全弱点。结果表明,在内孤立波作用下深水锚泊平台向内孤立波传播方向运动,当内孤立波波峰到达平台中心位置时锚泊平台的偏移达到最大,然后锚泊平台逐渐向初始平衡位置运动并最终趋于稳定;内孤立波促使隔水管系统顶部向内孤立波传播方向偏转,导致隔水管系统对锚泊平台运动产生一定的促进作用;当锚泊平台位移最大时隔水管系统关键参数响应值最大,但隔水管系统上球铰转角峰值时间有一定的滞后性,下挠性接头转角是内孤立波下的深水钻井隔水管系统安全弱点。Due to the frequent occurrence of internal solitary wave in the natural environment of South China Sea,there is a high risk for the dynamic failure of deepwater mooring platform-riser coupling system under internal solitary wave.To solve this problem,this paper established the dynamical model and analysis method of deepwater mooring platform-riser coupling system under internal solitary wave,developed the dynamic solver of deepwater mooring platform-riser coupling system,analyzed the dynamical characteristics of deepwater mooring platform-riser coupling system under internal solitary wave,and identified the dynamic response and coupling effect law of deepwater mooring platform-riser system under internal solitary wave as well as the security weakness of riser system.The results show that the deepwater mooring platform moves along the direction of internal solitary wave under the action of internal solitary wave,and the mooring platform displacement reaches a maximum as the internal wave peak gets to platform center,then the mooring platform moves gradually to the initial equilibrium position and eventually achieve stability.The top of riser system is urged by internal solitary wave to displace in the direction of internal solitary wave,which results in a certain promoting effect from riser system to the mooring platform movement.The key parameter response value of riser system reaches a maximum as the mooring platform displacement reaches the maximum,while the peak time of upper flex joint angle in the riser system has a certain lag,and the lower flex joint angle is the security weakness of deepwater drilling riser system under internal solitary wave.

关 键 词：深水 锚泊平台 钻井隔水管 内孤立波 动力学特性 

分 类 号：TE95[石油与天然气工程—石油机械设备]