Method for improving productivity of production well

The invention provides a method for improving the productivity of a production well. The method comprises the steps that firstly, mining parameters of the production well in a well area are collected; step 2, establishing a reservoir water blocking judgment standard table in combination with the formation parameters and the mining parameters; thirdly, the production wells with the severe water blocking degree in the well areas are selected according to the reservoir water blocking judgment standard table; 4, screening the production wells in combination with at least one of the remaining reserves, the initial water saturation and the water production condition of the production wells with the severe water blocking degree; and 5, the screened production wells are subjected to water lock removal, so that the productivity of the production wells is improved. According to the technical scheme, the production well with the severe water blocking degree in the well area is screened out on the basis of the reservoir