| 一种新型干树式半潜平台设计 |
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| 引用本文： | 纪亨腾,冉志煌,叶伟,李建勋,李国杰,唐修俊,王中念,吴洪武.一种新型干树式半潜平台设计[J].海洋工程,2017,35(6):10-18. |
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| 作者姓名： | 纪亨腾 冉志煌 叶伟 李建勋 李国杰 唐修俊 王中念 吴洪武 |
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| 作者单位： | 深圳深德海洋工程有限公司，广东 深圳 518067,深圳深德海洋工程有限公司，广东 深圳 518067,深圳深德海洋工程有限公司，广东 深圳 518067,深圳深德海洋工程有限公司，广东 深圳 518067,三一海洋重工研究院，广东 珠海 519055,三一海洋重工研究院，广东 珠海 519055,三一海洋重工研究院，广东 珠海 519055,三一海洋重工研究院，广东 珠海 519055 |
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| 基金项目： | 广东省引进创新创业团队计划资助项目 |
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| 摘 要： | 开发了一种新型的深吃水干树式半潜生产平台(TCDD-Semi),该平台可用于中国南海深水区域的油气田开发。它的一个显著特点是立柱的截面形状呈现为渐变形式,而非传统的等截面形式。立柱的底部最大,向上逐渐变小,再结合适当的下浮体设计,能够为平台在服役前期及在位状态时提供足够的浮力以及稳性。最重要的是这种新型立柱的设计能够明显地减小平台在恶劣海况时的垂向运动,从而使在平台上布置具有干式采油树的TTR立管系统成为可能。此外,这种渐变式的立柱设计也有利于减弱平台在流作用下的涡激诱导运动(VIM)。分析结果表明这种渐变式立柱半潜平台可以明显降低平台的垂向运动,也可以在码头组装时提供足够的浮力以及在平台下沉过程中提供足够的稳性。平台优越的垂向运动性能可以使顶部张紧式立管的行程范围限制在10.5 m之内(包括平台偏移、垂荡运动、潮汐影响、海床沉降、热膨胀等因素)。分析结果表明平台的垂荡范围、水平偏移、倾侧角度、上部模块重心处的加速度等可以满足设计要求,证明了这种新型干树式半潜平台的可行性。
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| 关 键 词： | 浮式平台 半潜式平台 垂荡运动 深吃水 立柱 干式采油树 立管张紧器 |
A new type of semi submersible platform with superior global performance for dry tree application |
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| JI Hengteng,RAN Zhihuang,YE Wei,LI Jianxun,LI Guojie,TANG Xiujun,WANG Zhongnian and WU Hongwu.A new type of semi submersible platform with superior global performance for dry tree application[J].Ocean Engineering,2017,35(6):10-18. |
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| Authors: | JI Hengteng RAN Zhihuang YE Wei LI Jianxun LI Guojie TANG Xiujun WANG Zhongnian and WU Hongwu |
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| Institution: | Offshore Tech LLC, Shenzhen 518067, China,Offshore Tech LLC, Shenzhen 518067, China,Offshore Tech LLC, Shenzhen 518067, China,Offshore Tech LLC, Shenzhen 518067, China,SANY Marine Heavy Industry Co., LTD., Zhuhai 519055, China,SANY Marine Heavy Industry Co., LTD., Zhuhai 519055, China,SANY Marine Heavy Industry Co., LTD., Zhuhai 519055, China and SANY Marine Heavy Industry Co., LTD., Zhuhai 519055, China |
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| Abstract: | A Tapered Column Deep Draft Semi-submersible (TCDD-Semi) concept has been developed for dry tree drilling and production application. The platform is suitable as a host facility for an oil or gas project in deep water area in South China Sea. The new concept features lower hull geometry with gradually varying column cross section, in contrast to the conventional semi submersible design with uniform columns. The enlarged lower columns, in combination with properly sized upper columns and pontoons, provide sufficient buoyancy and stability for topside-quayside integration and offshore preservice operations such as submergence and wet-tow. Most importantly, this new TCDD-Semi concept with tapered columns optimizes the cancelation effect of wave force and is able to reduce the heave motion in harsh environmental condition to such a level that the utilization of top tensioned drilling and production riser system with dry trees is feasible. Additionally, the tapered shape of the columns helps reduce the vortex induced motions (VIM) of the platform in currents. The design analysis results show that the proposed TCDD Semi-submersible platform has superb heave motion performance, sufficient quayside integration buoyancy, and adequate transition stability during pontoon submergence. Its excellent heave motion performance enables the application of top-tensioned riser system with 10.5 m stroke limit, including all contributing factors such as platform offset, heave motion, tide, seabed subsidence, thermal expansion, damaged tank and damaged mooring. In addition, the platform heave motion range, horizontal offset, heel angle, acceleration at topside COG, etc. also meet the requirement of the design basis. It is demonstrated that the use of dry trees on a semi-submersible platform is feasible. |
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| Keywords: | floating platform semi-submersible heave motion deep draft column dry tree riser tensioner |
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