3C–3D VSP vector wavefield separation with constrained inversion
Wenbo Sun, Sam Zandong Sun, Haijun Bai · 2009
Vector wavefield separation of multicomponent offset VSP data based on an optimized localized parametric inversion was introduced in this paper. We developed and employed a constrained optimization search algorithm (COSA) in this inversion to determine the optimum incident angles and velocities. We firstly approximately evaluate the range of both the velocities and the incident angles of P and SV wave, which can respectively refer to the acoustic longing data and the geometry. Then the results were applied to the COSA. Synthetic and field data examples show that application of the COSA makes the inversion method more stable and fast to decompose multicomponent offset VSP wavefield.