新型深吃水干树式半潜平台顶张紧立管（TTR）概念设计与分析

发布时间：2018-04-03 15:00

本文选题：干树式半潜平台　切入点：顶张紧立管　出处：《上海交通大学》2014年硕士论文

【摘要】：石油化工产品是一个国家工业发展的基础原料。近年来，随着陆地石油的大量开采，人们开始将目光投向蕴含着大量资源的海洋。为了开发海洋油气资源，人们设计了各种不同的海洋结构物。当前，海洋油气开发逐渐向深水发展，这一趋势对海洋结构物设计与分析提出了新的挑战。然而不管采用何种浮式结构物来进行海洋油气开发，都需要有立管系统来连接结构物与海底井口。立管在海洋油气开发中起着重要的作用，然而它同时却也是油气开发系统中最薄弱的环节之一。在各种形式的立管之中，顶张紧立管既可用于钻井、完井、修井，又可用于注水和生产。本文以顶张紧立管(TTR)为例，进行立管的整体分析和设计工作。主要内容包括： (1)运用Aqua和Orcaflex软件来进行新型深吃水半潜式平台的运动分析。分析该平台的频域特性，计算在不同海况下该新型平台与锚泊系统、立管的耦合运动，获取平台的波频和低频时域运动数据，作为后续立管分析的基础。 (2)运用Orcaflex软件来分析顶张紧立管的顶张力因子、顶张力器刚度对立管运动响应及受力的影响，结果表明，顶张力因子对立管运动响应及受力影响显著，顶张力器刚度对立管相对于平台的升沉运动影响显著。 (3)运用Matlab编制程序实现进化策略算法来进行立管海底端口的布置研究。将自行编制的程序的计算结果与Lingo计算结果进行对比，结果表明，程序能够有效提高计算效率。同时，对于立管数目较多的情况，提出了采用分组计算的方法，可以在保证结果有效性的前提下，显著减少计算时间。 (4)运用Orcaflex软件，依据立管规范API RP2RD来进行该新型平台的顶张紧立管系统设计。进行立管运动响应计算，，立管强度校核，分析立管疲劳损伤是否满足工作寿命要求，同时，进行立管之间的干扰分析，以避免立管之间碰撞的发生。
[Abstract]:Petrochemical products are the basic raw materials for the industrial development of a country.In recent years, with the massive exploitation of land oil, people begin to look to the ocean which contains a lot of resources.In order to develop marine oil and gas resources, various marine structures have been designed.At present, the development of offshore oil and gas is gradually moving to deep water, which poses a new challenge to the design and analysis of marine structures.However, no matter what floating structure is used for offshore oil and gas development, a riser system is needed to connect the structure to the bottom wellhead.Riser plays an important role in offshore oil and gas development, but it is also one of the weakest links in oil and gas development system.Among all kinds of risers, top tensioning risers can be used in drilling, completion, workover, water injection and production.This paper takes TTRT as an example to analyze and design the riser as a whole.The main elements include:1) using Aqua and Orcaflex software to analyze the motion of the new deep draught semi-submersible platform.The frequency domain characteristic of the platform is analyzed and the coupling motion of the riser between the platform and the mooring system under different sea conditions is calculated. The wave frequency and low frequency time-domain motion data of the platform are obtained as the basis of the subsequent riser analysis.2) using Orcaflex software to analyze the top tension factor of the top tensioning riser and the effect of the top tensioner stiffness on the motion response and force of the tube. The results show that the top tension factor has a significant effect on the motion response and force of the tube.The stiffness of top tensioner has a significant effect on the heave motion of the pipe relative to the platform.Thirdly, the evolutionary strategy algorithm is implemented by using Matlab program to study the layout of riser undersea ports.The calculation results of the self-compiled program are compared with the results of Lingo calculation. The results show that the program can effectively improve the computational efficiency.At the same time, in the case of large number of risers, the method of grouping calculation is proposed, which can significantly reduce the calculation time on the premise of ensuring the effectiveness of the results.Orcaflex software is used to design the top tensioning riser system of the new platform according to API RP2RD.The motion response of riser is calculated and the strength of riser is checked to analyze whether the fatigue damage of riser meets the requirement of working life. At the same time, the interference between risers is analyzed to avoid the collision between risers.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P742;P756.2

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