Determining multiphase fluid flow properties

A method, comprising:

• flowing a multiphase fluid from a hydrocarbon production well through a conduit, the multiphase fluid comprised of at least one of a liquid phase or a gas phase;
• measuring, with an ultrasonic tomographic multiphase flow meter (UMM) fluidly coupled to the conduit, one or more ultrasonic waveforms generated by the UMM from the multiphase fluid;
• measuring one or more properties of the multiphase fluid with one or more fluid measurement sensors coupled to the conduit;
• identifying the one or more ultrasonic waveforms and the one or more properties with a machine-learning (ML) control system that comprises at least one hardware processor operable to execute instructions stored on a tangible, non-transitory memory;
• determining, with the ML control system, multiphase fractions of the multiphase fluid from the one or more ultrasonic waveforms with a first ML model;
• determining, with the ML control system, a total flow rate of the multiphase fluid from the measured properties of the multiphase fluid with a second ML model;
• and
• determining, with the ML control system, a volumetric flow rate of the at least one of the liquid phase or the gas phase based on the determined multiphase fraction and the determined total flow rate.

An apparatus comprising a tangible, non-transitory computer-readable media that comprises instructions operable, when executed by one or more hardware processors, to cause the one or more hardware processors to perform operations comprising:

• identifying one or more ultrasonic waveforms generated by an ultrasonic tomographic multiphase flow meter (UMM) from a multiphase fluid that comprises at least one of a liquid phase or a gas phase;
• identifying measured properties of the multiphase fluid from the one or more fluid measurement sensors;
• determining multiphase fractions of the multiphase fluid from the one or more ultrasonic waveforms with a first ML model;
• determining a total flow rate of the multiphase fluid from the measured properties of the multiphase fluid with a second ML model;
• and
• determining a volumetric flow rate of the liquid phase and the gas phase based on the determined multiphase fraction and the determined total flow rate.