Abstract:

In this paper, the blocking ability of several foam flooding systems have been studied, which is foam flooding after oil-bearing model water flooding, single-pure foam flooding after complex foam or polymer flooding, complex foam flooding. Result shows that the single-pure foam flooding cannot form effective block under the condition of residual oil saturation, while complex foam flooding system can form effective block under various residual oil saturation. It can be determined that the complex foam flooding system is an useful profile control agent.

Key words: foam, complex foam, blocking ability, pressure difference of blocking