Quantitative judgment method for shaft blockage position

The invention provides a shaft blockage position quantitative judgment method which comprises the following specific steps: S1, acquiring a pressure recovery curve of a single well pressure change point to obtain pressure recovery time T; s2, the single-well daily output Q under the upper and lower pressure conditions of the blockage point is obtained, and the flow velocity v of fluid in the shaft is obtained according to the single-well daily output Q and the compression coefficient Z at the blockage point; and S3, calculating the depth H of the blockage point in the shaft according to the pressure recovery time T and the fluid flow speed v in the shaft. According to the quantitative judgment method, after blockage occurs, the blockage position is accurately judged through a pressure recovery method, an approximate blockage point judged according to fluid properties in the past is changed, pipe column risk research and judgment are quantified, stress research and judgment are conducted on the blockage point