is a geological
term for a mixture of hydrocarbons
that contain a significant amount of liquid or condensable compounds heavier than ethane
. These compounds may include propane
. Wet gas produced from a reservoir
will always contain some amounts of water. This is the ground water/formation water vapour in equilibrium with the gas under the pressure and temperature in the reservoir. When produced some of this water will precipitate out as free water in the production flow line
as pressure and temperature decreases. This water will contain no salts because its origin was water vapour.
Later in the production lifetime of the gas reservoir you might get free water breakthrough. This water will contain salts from the reservoir.
It must be emphasized however that the term wet refers to the presence of hydrocarbon components which are heavier than ethane and not water. It should also be noted that the presence of water is not exclusive to wet gas but may be present in each of the other four main types of reservoir fluids (black oil, volatile oil, retrograde gas and dry gas) in varying percentages.