泵送桥塞射孔技术在φ82 mm井眼中的应用

Application of pumped bridge plug perforation technique in φ82 mm hole

泵送桥塞射孔技术是页岩油气井压裂施工的重要手段,在φ139.7 mm套管内被广泛应用。随着勘探力度的加大,在原φ139.7 mm套管内进行侧钻的页岩油开发井不断出现,此类井通常套管内径只有82 mm,对泵送桥塞射孔的工具串的直径、重量、耐压、长度、强度等提出了新的要求。为此,在下井工具的设计选型、施工作业流程及参数设置等方面进行了优化,形成了针对小井眼泵送桥塞射孔的技术系列,并提出了需要重点把控的关键环节。该技术在苏北盆地帅页3-7HF井成功应用。

As an important method for fracturing construction of shale oil and gas wells,the pumped bridge plug perforation is widely applied in φ139.7 mm casing. With the deepening of exploration,the sidetracked wells in the original φ139.7 mm casing continually appeared for shale oil development. The casing inner diameter of such wells is normally only 82 mm. As a result,new specifications for the diameter,weight,pressure resistance,length,and strength of the tool string used to pump bridge plug perforation have been proposed. Thus,the technique series of slim hole pumped bridge plug perforation has been established,and the key steps that need to be controlled have been proposed,based on the optimization of downhole tool design and selection,construction operation,and parameter setting. The technique has been successfully applied to the well Shuaiye 3-7HF in the Subei Basin.