φ114.3mm套管分层压裂管柱的研制与应用

Research and Application of Separate Layer Fracturing in φ114.3 mm Casing

华庆油田长6厚油层是超低渗透油藏,大多数井为大斜度井,采用φ114.3 mm(41/2英寸)套管完井。为使多油层段的井得到有效开发,研制了φ114.3 mm(41/2英寸)套管分层压裂工艺管柱及配套工具。工艺管柱由水力锚、K344型封隔器、喷砂器等组成,实现了一趟管柱压裂3层的目的。至2009年底,现场应用113口井,施工成功率95%以上,起钻成功率100%,满足了井深2 500 m、井斜<45°的φ114.3 mm(41/2英寸)套管分层压裂的需要。

In view of the ultra-low permeability reservoirs characteristics of Chang 6 zone in Huaqing oilfield,Oil Gas Technology research institute,Changqing Oilfield Company developed separate layer fracturing string and supporting tools in φ114.3 mm casing,with the current status of exploitation of φ114.3 mm casing well completion and most for high-deviated wells.One-trip string could fracture three layers,which has been made up of hydraulic anchors,K344 packers,blasts and so on.By the end of 2009,in the ultra-low permeability reservoirs in Huaqing oilfield,this technology was applied in 113 wells,which resulted a operation success ratio of more than 95% and a hoisting success of 100%,which can meet the demand of separate layer fracturing wells.In the 114.3 mm casing,it could separate layer fracture in the well depth within 2500m and the oblique within 45°.