The natural gas production industries demand for wet gas flow metering technologies continues to increase and many production facilities now utilize some type of wet gas flow meter and predictions suggest that their use will continue to grow rapidly. Single phase differential pressure (DP) meters can be used to meter wet gas flows if the liquid flow rate can be obtained from an independent source and a suitable wet gas correction factor is available. As it is not a trivial task to measure the liquid flow rate of a wet gas flow there are wet gas flow metering systems that have been designed to predict both the gas and liquid phase flow rates. A recurring theme with these designs is to use a DP meter as the primary system and some secondary system (e.g. second DP meter, capacitance/conductance devices, radioactive sources, microwave system etc.) to supply the additional information from which the gas and liquid flow rates can be derived. The prediction methods are usually held in commercial confidence and therefore not available for public scrutiny.
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