A full waveform inversion method for inverting S-wave velocity profiles of slow formations near borehole

Abstract

The borehole full waveform inversion (BFWI) method represents a novel approach for inverting S-wave velocities in slow formations by utilizing the comprehensive information available from acoustic logging waveforms. This method stands out from traditional techniques, which are limited to formations with uniform velocity within the axial resolution of the logging tool or where the radial distribution pattern of S-wave velocity is already known, and which only make use of a subset of the acoustic waveform data. The BFWI method iteratively enhances the model to align the inverted waveforms with the actual waveforms by leveraging the full waveform information, including both guided and criticall..