Method for calculating instantaneous yield of five-point well pattern of low-permeability reservoir

The invention provides a method for calculating the instantaneous yield of a five-point well pattern of a low-permeability oil reservoir. The method comprises the following steps: collecting crack parameters and initial saturation of a fracturing well section of a target block, selecting a five-point well pattern, and establishing an injection-production unit physical model of the five-point wellpattern; dividing the injection-production unit into a plurality of subunits, and determining the instantaneous yield of each subunit at the starting moment; adding the yields of all the subunits, andobtaining the five-point well pattern instantaneous yield at the starting moment; and according to the five-point well pattern instantaneous yield and the initial saturation degree at the starting moment, sequentially calculating the five-point well pattern instantaneous yield at the nth moment through an iterative method, so that the five-point well pattern instantaneous yield of the five-pointwell pattern at the N momen