Research And Optimization On The System Of Hydraulic Supercharging Water Injection For Single Well

The system of hydraulic supercharging water injection for single well uses the pressure of the water supply line as the power source and the area difference of the piston to realize the supercharging water injection, it runs steadily and reliably and the operation cost is very low, so the system has better economic and technological index. The thesis studied each part's structure, working principle and each parameter's calculation method of the system. The thesis established the mathematical model and simulation model of the system and the storage generator, carried out the dynamic simulation for the system with storage generator and without by the SIMULINK in MATLAB and showed the storage generator's significance for the working stability of the system. The thesis studied cartridge valve with cone valve core and cartridge valve with cone valve seat, firstly, establishing the three-dimensional physical model of the cartridge valve by the Gambit in Fluent of CFD and generating the mesh of the cartridge valve, secondly, carrying out the steady-state three-dimensional numerical simulation and the dynamic, finally, analyzing the velocity field and the pressure field and the change of the velocity field and the pressure field for each kind of cartridge valve in different opening. On the base of simulation and analysis for the two types'cartridge valve, the thesis optimized the structure of the cartridge valve, proposed two kinds of optimization model and numerical simulation were carried out, gave the visual results of the flow field and showed the effect of the optimization by comparing the parameters of pressure drop, flow coefficient and the force on the valve core. Under the cooperation of the Third Production Company in Zhongyuan Oilfield and Wenmingzhai Oilfield, the field test was carried out in NO.10 water injection station.