负压法地层解堵增注工艺

THE TECHNOLOGY OF PLUGGING RELIEF ANG INJECTION GAIN USING NEGATIVEPRESSURE METHOD

负压法地层解堵工艺是一项新的解堵增注技术。它是借助一种专门装置一井下负压发生器（专刊号90220032、1）对地层产生可控制的、周期性的负压，以解除地层堵塞。经河南油田现场试验应用证实，该技术与酸化解堵工艺具有同等效果，而施工费用仅为酸化解堵工艺的三分之一。它主要适用于油层污染、堵塞的注水井的解堵增注。

The negative-pressure method is a new pluegging relief and injection gain technology.It makes use of the controlable, periodic negative-pressure produced by the downhole negative-pressre generator (Patent NO. 90220032. 1) to remove the formation plugging. The field tests indicate that this technolo gy is equivalent to the acidizing method for pluedng relief,but the operating costs of the former are only the one-third of that of the latter. It is mainly suitable to the removal of oil bed contumination and plug ging of injection well