Gas Reservoirs and Reservoir Properties

A natural gas reservoir which will remain in a one-phase state as it is depleted (no condensation in the reservoir) and from which it is not possible to commercially recover liquids at the surface, or at best a very small amount. 

A natural gas reservoir in which retrograde condensation will take place as it is depleted and from which liquids can be commercially recovered in surface facilities. 

The saturation of the pore space of a rock with gas, expressed in a percentage of the total pore space or as a fraction. The inverse of the gas saturation is called the water saturation. 

The interface that forms the boundary between an underlying body of subsurface water and a body of natural gas. Also called water table . 

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