Term applied to the technique of introducing gases and liquids under pressure into a system. More specifically, water or gas to maintain oilfield reservoir pressure (see also gas lift ).

The process of pumping gas or water into an oil-producing reservoir to provide a driving mechanism for increased oil production.

Forcing gas or water into an oil well to increase pressure and cause more oil to come to the surface. See Thermally Enhanced Oil Recovery.

The drawing of primary air into a gas burner by means of a flow of fuel gas.

the process of placing natural gas in underground storage or the producing reservoir in order to maintain pressure.