【作者】 孙强；

【导师】 毕祥军； 岳前进；

【作者基本信息】 大连理工大学 ， 工程力学， 2011， 硕士

【摘要】 浮式海洋平台在当代的油气开发中,扮演着越来越重要的角色。我国的浮式平台建设起步较晚,但近几年发展迅速。2010年2月26日出坞的“海洋石油981”是中国首次自主设计、建造的第六代3000米深水半潜式钻井平台,代表了当今世界海洋石油钻井平台技术的最高水平。而系泊定位系统作为确保浮式海洋平台在允许的范围内工作的重要结构,对海上油气开发的正常进行起着至关重要的作用。因此,对系泊系统的研究不可或缺。近年来发生了多起因系泊系统失效而造成的油气开发事故,显示出当今的系泊系统设计并不完善。本文首先对系泊系统的设计进行了总结和研究,基于理论模型对其基本设计中的参数进行讨论,并对其详细设计中的分析校核方法进行了研究。然后针对系泊系统的分析评价进行了研究,其研究方法主要分为数值模拟、室内模型实验和现场实测三种手段。由于系泊系统所处环境的不确定性,不能够准确计算出系泊系统的响应。而模型实验则存在相似比等问题,不能够完全模拟现场真实的系泊系统。相比之下,现场实测能够直观准确的反应系泊系统的响应信息。但是,现场实测也存在其局限性,不能够获得所有极端海况下系泊系统的响应。因此,本文分别以流花11-1半潜式FPS的多点系泊系统和渤海明珠号FPSO的软刚臂单点系泊系统为例,提出了基于实测、结合数值模拟的方法,对系泊系统的安全性能以及设计中的输入信息和算法进行分析评价。得到一套较为完善的系泊系统分析评价体系。更多还原

【Abstract】 Floating Platform is playing a more and more important role in the contemporary offshore oil and gas extraction. China’s research to floating platforms start late, but it’s developing very fast. The semi-submersible platform "Hai Yang Shi You 981" is completed in Feb.26th in 2010,which is the first sixth generation drilling platform designed and built independently by China.It can be used when the water depth reaches 3000m,and it stands for the highest level in the world’s offshore oil drilling platform technology. Mooring system keep the floating platform to move in the allowed region and it’s very important to ensure the safety during drilling and oil and gas extraction. Thus, research on mooring system is really important.Thus design of mooring system is not imperfect, and there are many accidents due to failure of mooring system. In this paper, the design of mooring systems are summarized and researched. In basic design, the design parameters were discussed based on theoretical models. In detailed design, the study on analysis method is carried out. There are three methods for research on the mooring system. The first one is numerical simulation, but it can not simulate the mooring system exactly because of the complexity of the environment. Model test is another method, but it can not describe the real response of mooring system as a result of uncertainty of the similar scale ratio. Relatively, the field monitoring is a better one. The real response of mooring system can be obtained in this way. However, it has its own disadvantage. We can not get every response during the extreme sea condition. Therefore, with the examples of LH11-1 FPS and the Mingzhu FPSO, a new method of evaluation and analysis to mooring system is proposed in this issue, which is combined by field monitoring and numerical simulation. The numerical simulation can be checked during the normal condition by monitoring result, and it can be used to evaluate the response under extreme condition. Taking the mooring systems of LH11-1 FPS and the Mingzhu FPSO as examples, the method of evaluation and analysis to mooring system based on monitoring is proposed in this issue.更多还原