Realtime water sample and salinity measurement in multiphase flow

A system, comprising:

• an oil and gas facility comprising a pipeline network for transporting production fluids;
• a multiphase flow meter installed on a flow line in the pipeline network to generate a measurement of a multiphase flow of the production fluids in the flow line;
• and
• a water sampling module protruding downward from a bottom side of the flow line in a horizontal section of the flow line, the water sampling module comprising:
• a bucket shaped cavity coupled to an interior volume of the flow line where a water sample is collected from the multiphase flow into the bucket shaped cavity, wherein non-water phase portion of the multiphase flow having lower density than water is repelled from the bucket shaped cavity due to a gravity effect;
• and
• a salinity probe coupled to the bucket shaped cavity, wherein the salinity probe generates a salinity measurement of the water sample to calibrate the multiphase flow meter to improve accuracy of the measurement of the multiphase flow.

A method to monitor a multiphase flow, comprising:

• installing a multiphase flow meter on a flow line to generate a measurement of a multiphase flow in the flow line;
• installing a water sampling module protruding downward from a bottom side of the flow line in a horizontal section of the flow line, the water sampling module comprising:
• a bucket shaped cavity coupled to an interior volume of the flow line;
• and
• a salinity probe coupled to the bucket shaped cavity;
• collecting a water sample from the multiphase flow into the bucket shaped cavity, wherein non-water phase portion of the multiphase flow having lower density than water is repelled from the bucket shaped cavity due to a gravity effect;
• generating, using the salinity probe, a salinity measurement of the water sample;
• and
• calibrating the multiphase flow meter to generate a calibrated measurement of the multiphase flow.