Optimization Algorithm for Estimating the Velocity Characteristics of Complex Medium

An optimization computational grid algorithm and the results of its application for estimating the velocity characteristics of complex medium based on experimentally obtained seismic wave arrival times are presented. An increase in the resolution of the algorithm for detecting inhomogeneities is achieved by adaptively selecting the grid step in areas with a pronounced heterogeneity of the medium structure. The algorithm automatically identifies zones of inhomogeneity, taking into account non-linear variations in the hodograph of seismic waves. The restriction on the minimum allowable grid step is deter-mined taking into account the upper limiting frequency of sounding oscillations generated by the vibration source and the number of intersections of seismic wave fronts at the grid nodes. The proposed algorithm has been tested on experimental data obtained from vibration sounding of mud volcano zones and the Baikal Rift Zone (BRZ). The consistency of the reconstructed theoretical velocity hodograph with the geological structure of the heterogeneity of the structure of medium in the areas of field works is shown.