摘要
每年7月至11月为南海海域台风高发期,频繁的台风严重影响了深水钻井作业效率和安全。对于超深水(水深大于1 500 m)钻井,在台风到达井位之前完成井口处理和隔水管回收,时间是一个严峻的挑战,因此一旦遭遇台风,撤离钻井平台须考虑悬挂隔水管的备用方案。以南海某超深水井(水深2 460 m)为例,分析了钻井隔水管硬悬挂和软悬挂模式下影响隔水管安全的主要因素,探讨了各个因素对波浪和海流的适应能力与敏感性。研究结果表明,多数条件下软悬挂隔水管模式对波浪和海流的适应能力更强,硬悬挂模式下隔水管系统的安全性主要受限于应力和挠性接头转角,软悬挂模式下隔水管系统的安全性主要受限于挠性接头转角和伸缩节冲程。上述认识可对深水钻井隔水管系统安装和应急悬挂条件下的作业安全提供参考。
Typhoons, which are frequent from July to November every year in South China Sea, seriously threaten the efficiency and safety of deep water drilling operations. In deep water areas（deeper than 1 500 m）, it is a big challenge to get the wellbore prepared and pull out all the riser joints before the arrival of a typhoon because of the limited T-time（typhoon preparation time）, so the hang-off mode should be considered as a backup response plan. In this paper, an ultra-deep water well（about 2 460 m）was analyzed as an example. Based on deep water well drilling data, different hang-off modes, i.e., soft hang-off and hard hang-off, were analyzed, as well as suitability of different factors to metocean. According to the analysis, in most cases soft hang-off mode is safer than hard hang-off mode. Safety performance of hard hang-off riser is limited by the stress of riser and angle of up flex joint; in comparison, soft hang-off mode is limited by angle of up flex joint and stroke of telescope joint. The findings provide references for drilling riser installation and hang-off operation in emergency situations.
出处
《中国海上油气》
CAS
CSCD
北大核心
2016年第4期114-119,共6页
China Offshore Oil and Gas
基金
国家自然科学基金"海洋深水浅层钻井关键技术基础理论研究(编号:51434009)"
国家重点基础研究发展计划(973计划)"深水海底井口-隔水管-平台动力学耦合机理与安全控制(编号:2015CB251203)"
"十二五"国家科技重大专项"深水钻完井工程技术(编号:2011ZX05026-01)"部分研究成果
关键词
南海
超深水
隔水管
悬挂模式
台风
环境适应性
South China Sea
ultra-deep water
drilling riser
hang-off mode
typhoon
metocean suitability
作者简介
盛磊祥, 男,工程师,2008年毕业于中国石油大学（华东）,现主要从事海上油气田完井设计、深水钻完井技术的研究工作。地址： 北京市朝阳区太阳宫南街6号院（邮编：100028）。E-mail： shenglx@cnooc.com.cn。
