Abstract: A method can include receiving real time data where the real time data include at least pressure sensor data from multiple pressure sensors of a hydrocarbon fluid production network for multiple locations in the hydrocarbon fluid production network; generating an expected operational region in a multidimensional domain using at least a portion of the real time data; operating a leak detection system using the expected operational region; tracking at least a portion of the real time data in the multidimensional domain; and issuing a leak detection signal responsive to the tracking indicating an excursion from the expected operational region, where the leak detection signal indicates the presence of a leak in the hydrocarbon fluid production network.

Abstract: A method can include detecting instability of multiphase fluid flow in a multiphase fluid production system using sensor measurements from the multiphase fluid production system; and, responsive to the detection of instability, increasing gas injection into the multiphase fluid production system until a variation metric of the sensor measurements decreases to a level indicative of stable multiphase fluid flow in the multiphase fluid production system.