Velocity spectrum three-dimensional filtering optimization velocity analytical method

The invention discloses a velocity spectrum three-dimensional filtering optimization velocity analytical method. The method comprises generating velocity spectrum for each point selected from a velocity analysis line; carrying out trace header modification on velocity spectrum data, and enabling the two-dimensional velocity spectrum to be constructed into a three-dimensional stack data body; adding a three-dimensional processing grid to the constructed three-dimensional stack data body, wherein the surface element center Y coordinate range of the grid is same with the surface element center Y coordinate range of the velocity analysis line, X coordinate increment of the grid is same with track pitch of the velocity analysis line, and the number of surface elements in the transverse measuring line direction is same with the velocity sector scan number defined when generating the velocity spectrum; carrying out three-dimensional filtering processing on the grid three-dimensional data body; and restoring the constructed three-dimensional stack data body into the two-dimensional velocity spectrum through trace header recovery. Through the trace header modification, the two-dimensional velocity spectrum is constructed into the three-dimensional stack data body for three-dimensional filtering processing, so that signal to noise ratio of the velocity spectrum is improved more directly and targetedly, and velocity analysis precision is improved.