半潜式钻井平台船体与隔水管耦合动力特性研究  

A Study on Coupled Dynamic Response of Hull and Marine Riser of a Semi-Submersible Drilling Platform

作　　者：赵晶瑞 谢彬 粟京 盛磊祥 ZHAO Jingrui;XIE Bin;SU Jing;SHENG Leixiang(CNOOC Research Institute Ltd.,Beijing 100028,China)

机构地区：[1]中海油研究总院有限责任公司,北京100028

出　　处：《中国造船》2019年第A01期146-153,共8页Shipbuilding of China

基　　金：国家重点基础研究发展计划(“973”计划)课题“深水海底井口-隔水管-平台动力学耦合机理与安全控制”(2015CB251203);国家自然科学基金“海洋深水浅层钻井关键技术基础理论研究”(51434009).

摘　　要：对一座应用于南海深水的半潜式钻井平台及其隔水管在实际作业环境下的耦合动力学行为进行了研究,建立了平台船体、系泊缆和隔水管的耦合分析模型,时域内分析不同的顶部张力对系统力学特性的影响,并确定了在该海区极端环境条件下能够进行钻井作业的与控制因素,提出了改善的工程建议。研究结果表明:隔水管顶部的垂向运动以低频运动为主,且与平台垂荡运动相关性较差,顶部张力应在隔水管水中重量的1.0~1.2倍范围。在给定的设计条件下,该平台能够进行钻井作业的极端条件为5年一遇季风,在该环境条件下,井口处产生的轴向载荷将达到极限。Coupled dynamic behavior of deep-water semi-submersible drilling platform with the marine riser is studied in this paper under actual operation conditions.A coupled model is established for the platform hull,mooring lines and the marineriser,and effect of static pretension at the top of the marineriseron the response of the whole system is analyzed.Extreme environmental conditions for drilling operation are obtained and corresponding critical actors are identified,while some suggestions for improvement are given.The results show that low frequency component at the top of marine riser is significant in vertical motion,and correlation with the heave motion of the platform is inconspicuous,and reasonable pretension at the top of marine riser is 1.0 to 1.2 times of the wet weight of the marine riser.The 5-year return period monsoon is considered as the extreme environmental condition for drilling operation,under which the axial load at wellhead will reach its limited value.

关 键 词：隔水管 半潜式钻井平台 耦合动力学行为 控制因素 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]