... dynamics polymer flooding flow in porous media polymer retention evaluation chemical flooding methods waterflooding permeability layer residual polymer flooding permeability variation coefficient profile control agent compound profile control agent gel microsphere water flooding injection...

...., an Upper zone and a Lower zone with a permeability contrast of up to a factor of 100. The main recovery mechanism currently applied is water flooding. Field data shows that injected water tends to travel quickly through the Upper zone along the high permeability layers and bypasses the low permeable Lower...