海上热采井多通道热敏封隔器研制与实验研究  

Development and indoor testing of multi-channel thermal packer for offshore thermal recovery wells

作　　者：李大俭 刘亚琼 顾启林[1] 房清超 江群 李夏青 季正欣 Li Dajian;Liu Yaqiong;Gu Qilin;Fang Qingchao;Jiang Qun;Li Xiaqing;Ji Zhengxin(Oilfield Production Department,China Oilfield Services Limited,Tianjin 300459)

机构地区：[1]中海油田服务股份有限公司油田生产事业部,天津300450

出　　处：《石化技术》2024年第9期179-181,227,共4页Petrochemical Industry Technology

摘　　要：海上稠油热采井多为水平井,油藏埋深大,井筒沿程热损失大,目前采用“隔热油管+环空注氮气”的井筒隔热方式,应用中存在氮气注入量大、成本高、汽窜风险大等不足。为此,研制了多通道热敏封隔器。通过优选膨胀剂,该封隔器可依靠膨胀剂无卡瓦热力坐封,降温胶筒收缩上提解封采,作业安全性高;主体采用偏心结构设计,增加环空注氮/反洗井、液控管线及光缆穿越通道并配套单流阀,满足海上热采井筒管具备注氮通道及监测特殊要求。室内实验表明:封隔器坐封温度240℃,耐温350℃,耐压21 MPa,单流阀开启压差小于1.5 MPa,坐封解封安全可靠,密封性能良好,在海上稠油热采方面具有良好的推广应用前景。Most of the offshore thick oil thermal recovery wells are horizontal wells,with large reservoir depth and large heat loss along the wellbore,and the wellbore thermal insulation method of“insulated tubing+nitrogen injection in the annulus”is currently adopted,which is characterized by large nitrogen injection volume,high cost,and the risk of vaporization,etc.In this regard,a multi-channel thermal packer has been developed.For this reason,a multi-channel heat-sensitive packer was developed.Through the preferred expansion agent,the packer can rely on the expansion agent without Kawa thermal sealing,cooling rubber tube contraction uplift unsealing mining,high operational safety;the main body adopts the eccentric structure design,increase the annulus nitrogen injection/backwash wells,liquid control pipelines and fiber optic cables through the channel and supporting the single-flow valve,to meet the offshore thermal mining wellbore tubing has a nitrogen injection channel and monitoring of the special requirements.Indoor tests show that:the sealer seating temperature of 240℃,temperature resistance of 350℃,pressure resistance of 21MPa,single-flow valve opening pressure difference of less than 1.5MPa,seating and unsealing safe and reliable,good sealing performance,in the offshore thick oil thermal recovery has a good prospect of popularization and application.

关 键 词：稠油热采 井筒隔热 热力膨胀剂 多穿越通道 

分 类 号：TE952[石油与天然气工程—石油机械设备]