A manner of producing crude oil or other liquids from the reservoir wherein the required energy is provided by existing gas pressure.

The addition of gas into a reservoir to maintain or increase the reservoir pressure or reduce the rate of decline of the reservoir pressure.

A means of enhancing crude oil or water production by injecting gas into the producing well bore.

The separation of a natural gas stream into products that meet market specifications.

A plant which processes natural gas for recovery of natural gas liquids and sometimes other substances such as sulfur.

A geological formation containing a single phase fluid that, when produced, may or may not yield condensed liquid, depending on the temperature, pressure, and composition of the reservoir.

An engine in which a gaseous fluid, under pressure or formed by combustion, is directed against a series of blades which converts the energy in the expanding gas into rotary motion.

A drilled and cased bore which facilitates the production of the hydrocarbon contents of a gas reservoir.

The gas produced in the natural gas zone above the oil zone in a reservoir.

The ratio of gas to liquid hydrocarbon commonly expressed as cubic feet per barrel, with both volumes corrected to standard conditions.

The hydrocarbon vapor produced or separated at surface conditions from the full well stream produced from a gas reservoir.

The hydrocarbon liquid separated at surface conditions from the full well stream produced from a gas reservoir.

A volatile hydrocarbon product which by its composition is suitable for use as a fuel in spark-ignition internal combustion engines.