分注井验封疑难现象分析及其压力曲线应用

Analysis of Problematic Phenomenon for Seal Inspection of Separate Injection Well and Application of Its Pressure Curve

分注井验封测量双压力曲线,并以此来判定封隔器的密封性,其简洁、直观,但其对验封仪封隔器与分注井封隔器密封状况的判定存在不确定性,对分注井封隔器组合密封状况的判定更是存在多解性。验封测量的双压力曲线是分注层段地层压力的综合反映,因而其地层压力曲线与正常注水压力比较可以表现出低压力、正常压力、高压力状况,双压力曲线的形态变化还可以刻化射孔地层渗透性与岩石均质性的相对好坏及岩石沉积韵律性等,对开展注水措施及其细化注水层段和调整注水等起到帮助作用。

Pressure curves are measured for seal inspection in separate injection well and based on that,packer's seal is judged. Although,it is simple and intuitive,determination to seal status of the detector packer and separate packer is uncertainty and multiple,solution is existed in the judgment well of packer sealing condition. Double pressure curve measured from packer's seal inspection is comprehensively reflected to formation pressure of separated layer segments,thus compared its formation pressure curve to normal injection pressure,situations of low pressure,normal pressure,and high pressure status are showed,and shape changes of double pressure curves also can carved of relative quality of perforated formation permeability and rock homogeneity,rhythm of sedimentary,which has helpful roles for carrying out water injection measures,refining injection zones,and adjusting injection.