The derivation of shear velocities from log and VSP data

A knowledge of formation Shear Velocities is essential for many state of the art computations in Petrophysics and Geophysics. In particular mechanical properties of formations can only be accurately predicted if the corresponding formation shear velocity is equally accurately known. The interpretation and prediction of Amplitude versus Offset dependence of seismic reflection strength, AVO, is also heavily dependent on the knowledge of formation shear velocities.