Abstract:

The foam plug removal technology is studied aimed at the chocking problem of near wellbore formations in the process of production.Numerical simulation analysis is used to study the impact of foam on near wellbore area in the process of foam plug removal and the mechanism.It is found that during injection，foamy fluid will to a certain degree influence water saturation in near wellbore formation，so it impacts intensity of rocks.During blowout，that foam impacts porous rocks and its continuous washing make the permeability adjacent wellbore area be improved.It is recognized that foam plug removal works mainly by means of the washing along perforation channel radial direction and horizontal extension at the end as well as the area adjacent wellbore.The technology is applied in Shengli Oilfield，and satisfactory consequence is achieved.

Key words: foam plug removal, foam fluid, plug removal mechanism, injection process, blowout process