Two-Stages Techniwue of to Full Waveform Inversion: From Near Surface to Deep Target Geological Structures

Abstract

Full Waveform Inversion in its traditional formulation is nothing else but finding the minimum of the objective functional, that characterizes L2 difference between acquired and simulated wave fields. The accumulated experience proves the necessity of the following conditions for correct recovery of the wave propagation velocity: • The presence of low time frequencies in the data; • Information about near surface structure of the media. We modify the traditional L2 objective functional on thy base of decomposition of the model space. This modification weakens the requirements for the presence of low time frequencies.