大压差可洗井封隔器研制与应用  

Development and Application of Big Differential Pressure and Washable Packer

作　　者：晏耿成[1,2] 魏立军[1,2] 杨会丰[1,2] 

机构地区：[1]长庆油田公司油气工艺研究院,西安710018 [2]低渗透油气田勘探开发国家工程实验室,西安710018

出　　处：《石油矿场机械》2014年第1期69-71,共3页Oil Field Equipment

基　　金：中国石油集团公司科技专项"长庆油田精细分层注水工艺技术重大工程试验"(2010F-0402)

摘　　要：针对注水时间长,层间或层内压差大,常规封隔器可洗井通道自动打开,导致封隔器不密封,上层地层水窜入下层问题,研制了一种大压差可洗井压缩式封隔器。该封隔器增加了洗井承压装置,使洗井时能承受大压差的层间压差,避免由于层间压差波动导致洗井通道开启,导致该封隔器密封失效,提高了封隔器洗井作业的可靠性。现场应用13口井,最大层间压差3.5MPa,封隔器验封合格率100%,解决了层间压差大,洗井通道自动打开导致封隔器失效的问题。For longer-time water injection, large pressure difference of layer or between layers, con-ventional packers flushing channel can be opened automatically, causing the packer not sealed, fleeing into the lower upper formation water problems, a newly developed large pressure differ-ence can be washed well packer. The large pressure washable wells compression packer increased pressure flushing device,making wash well to be able to withstand large pressure difference be-tween the layers, to avoid the inter-layer pressure fluctuations cause flushing channel open, cau-sing the packer seal failure, improve packers flushing operation reliability. In Changqing oilfield applications on 13 wells were carried out, the largest inter-layer pressure was 3. 5 MPa, packer seal inspection passed rate of 100% ,thus to solve the large pressure difference between layers and failure of the packer problem caused by flushing channel automatic open.

关 键 词：大压差 可洗井 封隔器 

分 类 号：TE931.2[石油与天然气工程—石油机械设备]