... to a conventional CO 2 flood and subsequent waterflooding, in addition to gas recycling and primary production. A major goal of the test was to determine whether the oil remaining in this area could be displaced by a slug of thickened CO 2 to form a mobile oil bank that could be detected at a nearby observation...

... certain conditions the stabilized oil bank formed during dilute surfactant flooding may be composed of as many as three distinct oil banks. These secondary oil banks are characterized by the arrival of high oil cuts, high sulfonate concentrations, and low interfacial tensions in the effluent stream...

... for clarification. These are: Radial Encroachment - During this period, the movement of water from the injector into the reservoir is radial until the perimeter of the swept oil bank collides with the swept oil bank of an adjacent injector. If no oil bank is formed, radial encroachment ends with the collision...