Output fusion of mpc and pid and its application in intelligent layered water injection of oilfield

Efficient and reliable wireless wave-code communication technology is crucial for improving the efficiency of intelligent stratified water injection in oilfield; however, the existing technology suffers from slow wave-code generation and low wave-code recognition rate due to the poor fluid-driven control method of pipe column. In order to improve the dynamic response performance of wave code communication, this paper proposes an output fusion optimal control method based on MPC-PID (Multivariable Predictive Control-Proportional Integral Derivative Control). Firstly, the dynamic response characteristics of well structure and formation flow-pressure characteristics with whole well water distribution equipment are analyzed, and secondly, the wave code generation models of whole-well and different layer sections of stratified water injection are established by combining the whole-well structure and physical dynamic processes. Finally, the MPC-PID optimal fusion control algorithm is designed and the calculation process of the optimal weights is presented. The simulation results show that the MPC-PID fusion control method is superior to the traditional method in reducing overshoot, stability, and which the wave-code communication.