摘要
深水油气田通常采用水下生产系统进行开发,如果在生产过程对各个环空压力不进行有效的管理将影响井筒完整性,严重的将导致井的报废。本文介绍了井各个环空的定义,环空压力形成的原因,常见的几种环空压力管理措施的优缺点对比,分析了考虑环空压力下的套管强度设计工况考虑因素,并介绍了热效应引起的环空压力计算流程。同时针对南海某深水开发气田一口典型的生产井进行了环空压力计算,并对计算结果进行分析后选择经济安全的安装破裂盘方式进行管理,结论表明经过近3年的生产,井筒完整性良好,达到了预期管理目的,为后期其他油气田开发奠定了理论基础,对工程具有指导意义。
Usually the deepwater oilflied is developed by subsea system.Thermal pressure build-up is very normal during the well production and should be mitigated with right way,if not it will cause failure of well integrity or even well abandonment.This paper gives a simply introduction of annular layers,the reasons causing annular pressure built-up,also presents the pros and cons of common methods on ABP mitigation.This paper also analysis the casing design load under APB and design flow of casing under thermal pressure build up.A case study of deepwater gas well in south China sea is presented to demonstrate the significant annular layers pressure during well production and the APB mitigation method determination with rupture disk, after three years production the well still keep good well integrity.This paper serves as a good reference and guideline for the annular pressure management of deepwater wells.
作者
同武军
赵维青
杜威
郑金龙
TONG Wujun ZHAO Weiqing DU Wei ZHENG Jinlong(CNOOC Ener Tech-Drilling ＆ Production Co., Zhanjiang Guangdong 524000, China CNOOC Zhanjiang Branch, Zhanjiang Guangdong 524000, China)
出处
《石油化工应用》
CAS
2017年第9期24-27,共4页
Petrochemical Industry Application
基金
中国海洋石油总公司科研项目"深水井环空圈闭压力控制技术及关键工具研究"
项目编号:CNOOC-KJ125
ZDXM12
LTD03
NFGC2014-08
关键词
深水井
水下生产系统
井筒完整性
环空压力
热效应
破裂盘
deepwater well
subsea production system
well bore integrity
annular pressure build up
thermal effect
rupture disk
