Method, device and equipment for generating velocity field in seismic exploration and storage medium

The invention discloses a velocity field generation method and device in seismic exploration, equipment and a storage medium, and the method comprises the steps: S1, obtaining seismic observation data, and forming an initial shot gather according to the observation data; s2, performing Kirchhoff offset on the initial shot gather to generate a first offset gather; s3, performing forward modeling processing on the current velocity field to obtain a forward modeling set, and performing Kirchhoff offset on the forward modeling set to generate a second offset gather; s4, calculating a residual error according to the first offset gather and the second offset gather; s5, judging whether an iterative convergence condition is met or not according to the residual error, and if yes, acquiring a current velocity field as a final velocity field; and if not, performing demigration on the residual error to obtain a reverse shot gather, updating the current velocity field according to the reverse shot gather, and executing t