What type of gas has a high content of liquid hydrocarbon at pressures and temperatures lower than reservoir conditions?

• A. Associated Gas
• B. Nonassociated Gas
• C. Gas Condensate
• D. Wet Gas

Answer: (C)

The key idea is dew point and retrograde condensation in gas systems. When gas is produced and its pressure and temperature fall below the hydrocarbon dew point, heavier hydrocarbons condense out of the gas and form a liquid phase. This creates a liquid-rich stream associated with the gas, known as condensate. That’s exactly what happens in a gas condensate system: at sub-dew-point conditions, a high content of liquid hydrocarbon appears even though you’re dealing with gas overall.

Associated or nonassociated gas describes the origin of the gas, not the presence of condensed liquids. Wet gas contains heavier hydrocarbons still in the gas phase, not a substantial liquid condensate formed by drop in pressure/temperature.