CO 2 or N 2:
Force oil from injection wells toward production wells
Maintain reservoir pressure
Increase flow using Huff-n-Puff techniques
CO2 Huff-n-Puff process can increase oil production from stripper and other low-volume wells by injecting into the oil-bearing formation a slug of CO2 at less than fracturing pressure, then shutting in the well for a time determined by bottom-hole pressure. This has yielded excellent results in light oil formations throughout the U.S.