永久式光纤监测技术在海上首口二氧化碳回注井的应用  

Application of Permanent Optical Fiber Monitoring Technology in the First offshore Carbon Reinjection Well

作　　者：邓成辉 曹波波 党黎锋 宣涛[2] 张玺亮[2] Deng Chenghui;Cao Bobo;Dang Lifeng;Xuantao;Zhang Xiiang(Shenzhen Branch of CNOOC Energy Development Co.,Ltd.,Shenzhen 518067;CNOOC Energy Technology&Services Limited,Tianjin 300452)

机构地区：[1]中海石油(中国)有限公司深圳分公司,深圳518067 [2]中海油能源发展股份有限公司,天津300452

出　　处：《石化技术》2024年第1期68-70,61,共4页Petrochemical Industry Technology

摘　　要：近期南海东部海域恩平油田我国海上首口二氧化碳回注井正式投产,采油分离出来的二氧化碳气体被烘干压缩后回注至储层进行封存。为确保注入期间的安全性需要实时掌握注入参数判断井下情况,采用永久式分布式光纤监测技术,实现了全井筒温度剖面及井底压力的实时动态监测。现场应用结果表明:分布式光纤温度监测剖面与地层梯度测试温度剖面误差0.1%,光纤压力计监测结果与注入压力、地层压力误差0.05%,根据光纤数据监测的分布解释结果可反演二氧化碳回注剖面,从而指导注气参数动态调整。The first offshore carbon dioxide reinjection well in Enping Oilfield in the eastern waters of the South China Sea has producted.The carbon dioxide gas separated from oil and is dried and compressed before being reinjected into the reservoir for storage.To ensure safety during injection,it is necessary to real time monitor the injection parameters to determine the underground situation,and permanent distributed fiber optic monitoring technology is adopted.achieving real-time dynamic monitoring of the entire wellbore temperature profile and bottom hole pressure.The on-site application results show that the error between the distributed optical fiber temperature monitoring profile and the temperature profile of the formation gradient test is 0.1%;,The error between the monitoring results of thefiber optic pressure gauge and the injection pressure and formation pressure is 0.05%.Based on the distribution interpretation results of thefiber optic data monitoring,the carbon dioxide reinjection profile can be inverted to guide the dynamic adjustment of gas injection parameters.

关 键 词：二氧化碳回注 永久式光纤 井筒完整性 管外窜流 

分 类 号：TE53[石油与天然气工程—油气田开发工程]