近海老龄导管架平台结构完整性评估

发布时间：2018-12-13 22:09

【摘要】：海洋平台是进行海上石油开发生产的主要设备,平台具有复杂的结构、高昂的造价,但其寿命一般又不是太长,因此自从我国开展海上石油开采以来,已经有相当一部分的平台进入了老龄或超龄服役阶段。而其中,导管架式平台应用最为广泛,老龄化程度也最严重。应用完整性管理体系,通过构建导管架平台的完整性管理体系,对老龄导管架式平台进行结构与状态评估、服役水平分析、极限承载能力及退役拆除分析,可以降低海洋石油开采成本,提高安全性,具有显著的经济效益。本文主要是针对我国平台服役的现状,结合课题组开展的老龄平台方面的研究与项目,在完整性管理体系下以老龄导管架平台为研究对象,开展近海老龄平台的服役状态与退役弃置的技术研究。本文调研了国内外完整性管理理论的应用领域与发展现状,在此基础上给出平台结构完整性管理的定义与框架流程,然后应用有限元分析软件建立导管架平台的结构精细模型,包括整体模型与局部结构的精细模型;考虑平台服役的土壤数据和风、浪、流、等环境数据,对导管架平台进行静力分析、动力分析、关键构件的应力分析以及剩余寿命评估等;进而研究极端风暴潮条件下的平台结构的静力非线性特性、动力响应与极限承载能力水平分析;以服役状态的评估数据为基础,确定平台的服役水平以及维修退役方案,研究平台退役弃置的一般步骤,并针对弃置中的关键技术进行合理分析,结果表明平台在完整性管理体系下满足服役要求。应用有限元分析软件进行拆除过程中的切割与起吊强度与稳定性分析,以保证退役弃置过程的安全进行。
[Abstract]:Offshore platform is the main equipment for offshore oil development and production. It has complex structure and high cost, but its life span is generally not too long. A considerable number of platforms have entered the aging or overage service stage. Among them, the conduit platform is the most widely used, aging degree is also the most serious. By constructing the integrity management system of jacket platform, the structure and status evaluation, service level analysis, ultimate carrying capacity and decommissioning analysis are carried out. It can reduce the exploitation cost of offshore oil, improve safety and have remarkable economic benefit. This paper aims at the current situation of platform service in our country, combined with the research and project of the aging platform carried out by the research group, taking the ageing jacket platform as the research object under the integrity management system. To carry out the technical research on the service status and decommissioning of offshore aged platform. In this paper, the application field and development status of integrality management theory at home and abroad are investigated. On this basis, the definition and frame flow of platform structural integrity management are given, and then the fine structural model of jacket platform is established by using finite element analysis software. It includes global model and fine model of local structure. Considering the soil data and environmental data such as wind, wave, current and so on, the static analysis, dynamic analysis, stress analysis and residual life assessment of the jacket platform are carried out. Furthermore, the static nonlinear characteristics of platform structure under extreme storm surge, the dynamic response and the level analysis of ultimate bearing capacity are studied. Based on the evaluation data of service status, the service level and maintenance scheme of the platform are determined, the general steps of decommissioning of the platform are studied, and the key technologies in the disposal are analyzed rationally. The results show that the platform meets the service requirements under the integrity management system. In order to ensure the safety of decommissioning process, the strength and stability of cutting and lifting during demolition are analyzed by using finite element analysis software.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE95

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