Steam Generation Control System for Enhanced Oil Recovery

The patent implements multiple feedback control loops including a primary control loop that monitors steam quality and adjusts feedwater flow rate, and a secondary control loop that monitors injection pressure and adjusts feedwater flow rate. Sensors continuously measure steam quality parameters and pressure, feeding this information back to controllers that automatically adjust control valves to maintain optimal conditions, thereby improving reliability through automated closed-loop control.

The control system is designed to perform multiple functions: it monitors both steam quality and injection pressure, controls feedwater flow rate through coordinated action of multiple control loops, and can operate in different modes (automatic control, manual override). The PLC-based control system integrates these diverse control functions into a single universal platform, managing both quality and pressure control simultaneously.

The control system is segmented into distinct functional control loops: a primary control loop dedicated to steam quality control and a secondary control loop dedicated to injection pressure control. Each loop operates semi-independently with its own sensors, controllers, and actuation mechanisms, allowing optimized control of each parameter while maintaining overall system coordination through the central PLC system.

The PLC-based control system serves as an intermediary that coordinates between the primary quality control loop and the secondary pressure control loop. It processes signals from both loops, manages the coordinated adjustment of feedwater control valves, and ensures that both control objectives are met simultaneously without conflict, thereby enabling efficient steam generation with controlled complexity.