套损井小直径压裂封隔器研制及应用

大庆油田老区套管损坏的油水井数量逐年增加.对于修复的井筒,受限于套管缩径,现有的压裂工具无法下入和起出,严重影响到主力产区的挖潜上产和注采井网完整性.采用结构优化设计与室内试验相结合的方式,研制出高性能的小直径扩张式压裂封隔器.室内试验与现场应用表明,该封隔器能通过最小内径102 mm的套管,满足承压70 MPa、耐温...

Development and Application of Small Diameter Fracturing Packer in Casing Damaged Wells

The damaged oil and water wells in the old area of Daqing Oilfield have been increasing year by year.For the repaired wellbore,limited by the casing shrinkage,the existing fracturing tools cannot be run in and out,which seriously affects the potential tapping and production and the integrity of the injection-production well pattern in the main producing areas.A high-performance small-diameter expansion fracturing packer was developed by combining structural optimization design with indoor tests.Indoor tests and field applications show that the packer can pass through casings with a minimum inner diameter of 102 mm,and meets the multi-layer fracture reconstruction requirements for repairing the casing damaged wells with a pressure of 70 MPa and temperature of 120℃.The application of the packer and its supporting tools improved the situation that the casing damaged wells are in low production or shut down for a long time,which provides technical support for stable production of the old areas.