In a dry gas reservoir, the reservoir temperature is well above the cricondentherm. During production, the pressure-temperature path of the fluid does not penetrate the phase envelope (as shown below) although some sources say a very marginal amount may be produced. As a result, only gas production occurs at reservoir and surface conditions.
A dry gas reservoir can be described as GOR > 100,000 scf/STB. Water can be produced, and the composition is mostly methane.
Reference:
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M. Barrufet, Texas A&M PETE 310 Reservoir Fluids Course Notes: Three & Multicomponent Mixtures, 2019.
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T. A. Blasingame, Texas A&M PETE 613 Natural Gas Engineering Course Notes, 2106