Gas condensate fields

is a single subsurface accumulation of gaseous hydrocarbons including gasoline and kerosene vapors and, less frequently, components with a higher molecular weight. In case of isothermal reduction of the formation pressure, part of them condenses in the form of gas condensate. Reservoirs with the relative amount of at least 5 to 10 grams of condensate per cubic meter are usually referred to as gas condensate reservoirs. Gas condensate reservoirs can be confined in any traps and catchers.
According to the source of liquid hydrocarbons, there are the following gas condensate reservoirs:
  • primary gas condensate reservoirs formed at the depths of over 3.5 thousand meters separate from oil accumulations;
  • secondary gas condensate reservoirs formed through partial vaporization of the oil blend.
There are saturated (the formation pressure is equal to the pressure of initial condensation) and non-saturated (the initial condensation pressure is lower than the formation pressure) gas condensate fields according to thermo-baric conditions.

Glossary of Oil and Gas. 2013.

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