Influence of Local Velocity Heterogeneities on the Seismic Wave Field and Their Integration into the Depth - Velocity Model

Real geological media generally have a complex structure and heterogeneous compound. The presence of local heterogeneities in the overburden leads to a distortion of the effective parameters of the waves reflected from underlying horizons. In the present work, we explore the influence of low-speed local heterogeneities in the upper part of the medium, associated with gas pockets, on an example of 3D marine seismic data and the method of accounting for them by constructing a detailed depth velocity model based on global seismic tomography