Production optimization method and device for oil reservoir gas lift exploitation

The invention discloses a production optimization method and device for oil reservoir gas lift exploitation. The method comprises the following steps: establishing a gas injection and oil production characteristic equation of each gas lift well of an oil reservoir; according to the total gas lift gas distribution amount of the oil reservoir and the gas injection and oil production characteristic equations of the gas lift wells, the optimal augmented injection oil production efficiency or the optimal augmented injection yield is determined through an equation derivation method; and for each gas lift well, determining the optimal gas distribution amount of the gas lift well according to the optimal augmented injection oil production efficiency and the corresponding coefficient in the gas injection oil production characteristic equation of the gas lift well, or according to the optimal augmented injection yield and the corresponding coefficient in the gas injection oil production characteristic equation of the g