Abstract:

A series laboratory experiments have been carried out in this paper to investigate foam behaviors during N2/ASP alternative injection, especially its flow behaviors under different flow rate and pressure conditions. Experimental results show that the formation and flow of foam were seriously affected by velocity and pressure. High flow velocity makes gas channeling happen,
and low flow velocity makes the difficulty increase of foam propagating along the displacement. Low pressure is beneficial to generate stable foams. Once foam formed, its flow resistance increases and mobility decreases notably. In the process of N2/ASP alternative injection, the foam generated in the input area will propagate along porous media at the displacing of viscous fluid.

Key words: EOR, chemical flooding, ASP flooding, foam flooding, foam