Pressure Control based Hybrid MPC and PID Control for Parallel Centrifugal Well Injection Pumps
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Abstract
Well Injection pumps is essential equipment in the upstream oil and gas industry. These pumps are primarily employed to inject water into the reservoir to maintain reservoir pressure, or to waste the water excess after exploration. The most common use Pressure control is only PID control, which has limitations such as Complex and Time-Consuming Parameter Tuning and Poor Adaptability to Parameter Changes. To address this challenge, this study develops hybrid MPC and PID control for pressure control to increase response time and reduce overshoot due to parameter changes. To get the plant model, ARMAX (Auto Regressive Exogenous Moving Average with Exogenous Inputs) is used by analyzing historical measurement data for pressure and throttle valve. The proposed strategy effectively combines the fast response of the PID controller with the foresight and optimization capabilities of the MPC. Load change simulations show that the Hybrid MPC-PID controller exhibits faster response time and more precise overshoot reduction capability compared to the single PID and pure MPC strategies. The final optimized model achieved substantial improvements in the IAE index, where the hybrid MPC-PID achieved 0.37% compared to 4.71% for the pure MPC and 7.24% for the PID controller. The implementation of this Control enables increased efficiency in the Water Injection Pump.
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