Multiphase meter calibration system and methods thereof

A closed loop system for calibration of a multiphase meter, comprising:

• a separation vessel, comprising a first compartment for containing water and a second compartment for containing oil;
• a first junction located downstream of the separation vessel having a first input, a second input and an output;
• a water pipeline configured to receive water from the first compartment and deliver it to the first input of the first junction;
• an oil pipeline configured to receive oil from the second compartment and deliver it to the second input of the first junction;
• a multiphase meter section comprising the multiphase meter to be calibrated located downstream of the output of the first junction;
• a second junction located downstream of the multiphase meter section having an input configured to receive water, oil or both from the multiphase meter section, a first output, and a second output;
• a single phase calibration unit located downstream of the second junction and upstream of the separation vessel;
• a single phase pipeline located downstream of the second junction configured to receive water or oil from the first output of the second junction and deliver it to the separation vessel through the single phase calibration unit;
• a multiphase collecting pipeline located downstream of the second junction configured to receive water, oil or both from the second output of the second junction and deliver it to the separation vessel without passing through the single phase calibration unit;
• wherein the separation vessel, the first junction, the multiphase meter section, the second junction and the single phase calibration unit are fluidly connected;
• wherein the water pipeline and oil pipeline are connected in parallel between the separation vessel and the first junction;
• and
• wherein the single phase pipeline and the multiphase collecting pipeline are connected in parallel to the second junction.