筒形基础简易井口平台在涠洲湾的应用研究

发布时间：2018-06-12 09:18

本文选题：井口架 + 筒型基础　；参考：《天津大学》2014年硕士论文

【摘要】：中国近海海域经过多年的勘探，，已经发现了很多中、小型油田，其特点是小块油田多、油田分布广、储量小或原油物性差等，属于边际油田。对于这些油田的开发需要通过技术创新来降低成本。对于边际油田，简易的平台形式，最少的海上施工资源，可搬迁可重复使用的结构，能够大幅度降低油田开发的费用。对国内外简易平台及筒型基础的技术情况、实际应用情况进行调研发现，目前筒基简易平台在国内外已经有了一定的应用，这为今后边际油田的开发积累了一定的经验基础。本文研究总结了海洋石油平台及筒型基础的设计理论和设计方法，论述了涠洲6-8油田井口架加筒基平台的设计方案。方案中井口架的设计增加了钻完井作业的灵活性，同时可以节省钻井船的动复原费用。井口架结构使用隔水套管作为结构的基础，突破了隔水套管只为钻完井提供支持的理念，充分发挥了隔水套管的潜力，节省了投资。筒基平台的设计简化了平台海上安装的流程，节省了海上施工的费用。把井口架和筒基平台进行刚性连接，合理的对井口架进行了补强，使得整个结构的受力更加合理。对于井口架及筒基平台的海上安装方案，本文进行了详细的论述，井口架实现了单船安装，为今后的平台安装提供了新的思路。筒基平台的安装中，由于平台所处海域土质情况异常，出现了筒基贯入困难的现象，本文对筒基贯入困难情况进行分析论证，并对平台的加固措施进行了详细的论述。最后本文通过专业的海洋工程设计软件SACS对井口架及筒基平台进行了详细的计算分析，主要从静力，地震及疲劳这三方面对平台进行了计算验证，论证了该结构形式在服役期间是安全可靠的。
[Abstract]:After many years of exploration in the offshore waters of China, many medium and small scale oilfields have been discovered, which are characterized by a large number of small block oilfields, wide distribution of oilfields, small reserves or poor physical properties of crude oil, and belong to marginal oilfields. For the development of these oilfields, technological innovation is needed to reduce the cost. For marginal oilfields, simple platform forms, minimum offshore construction resources and removable reusable structures, the cost of oilfield development can be greatly reduced. Through the investigation of the technical situation and practical application of the simple platform and cylindrical foundation at home and abroad, it is found that the simple platform of tube foundation has already been applied to some extent at home and abroad. This paper studies and summarizes the design theory and design method of offshore oil platform and barrel foundation, and discusses the design scheme of wellhead Derrick plus barrel foundation platform in Weizhou 6-8 Oilfield. The design of wellhead frame increases the flexibility of drilling and completion operation and saves the dynamic recovery cost of drilling ship. The water-proof casing is used as the foundation of the wellhead structure, which breaks through the concept that the water-proof casing only provides support for drilling and completion, fully exerts the potential of the water-proof casing and saves investment. The design of the platform simplifies the process of offshore installation and saves the cost of offshore construction. The wellhead frame is rigidly connected with the wellhead base platform, and the wellhead frame is strengthened reasonably, which makes the force of the whole structure more reasonable. For the offshore installation scheme of the wellhead frame and the wellbore foundation platform, this paper discusses in detail, The wellhead frame realizes the installation of single ship and provides a new idea for the installation of platform in the future. During the installation of the platform, due to the abnormal soil quality in the sea area of the platform, there is a phenomenon that the penetration of the tube foundation is difficult. This paper analyzes and demonstrates the difficult situation of the penetration of the tube foundation. The reinforcement measures of the platform are discussed in detail. Finally, this paper makes a detailed calculation and analysis of the Derrick and the platform based on the tube through the professional marine engineering design software sac, mainly from the static analysis, The platform is verified by seismic and fatigue calculation, and it is proved that the structure is safe and reliable during the period of service.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P751

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