Method and apparatus for measuring wet gas utilizing an augmented Coriolis flow meter

An apparatus, comprising:

• a Coriolis flow meter having one or more flow tubes, the Coriolis flow meter configured to determine a density of a wet gas fluid flow passing through the one or more flow tubes;
• a SONAR flow meter having an array of sensors disposed on at least one of the one or more flow tubes;
• a first pressure probe and a second pressure probe, the probes spaced apart from one another and configured to collectively determine a measurement of differential pressure of the wet gas fluid flow within at least one of the flow tubes between the probes;
• and
• a processing unit in communication with Coriolis flow meter and the SONAR flow meter, and a non-transitory memory storing instructions, which instructions when executed cause the processing unit to:
• measure a density of the wet gas fluid flow passing within the one or more fluid flow tubes of the Coriolis flow meter using the Coriolis flow meter;
• determine an expected density of the multi-phase fluid flow using a measured pressure value of the fluid flow and/or a measured temperature value of the fluid flow, and an equation of state model;
• determine a mass flow rate of a constituent within the wet gas fluid flow using the Coriolis flow meter measured fluid flow density when the Coriolis flow meter measured fluid flow density is within a predetermined range of the expected density of the fluid flow and a drive gain value of the Coriolis flow meter is below a threshold drive gain value;
• and
• determine the mass flow rate of the constituent within the wet gas fluid flow using the measurement of differential pressure and the SONAR flow meter when the Coriolis flow meter measured fluid flow density is outside of the predetermined range of the expected density of the fluid flow and the drive gain value of the Coriolis flow meter is above the threshold drive gain value.