AVO Inversion Using Physical Constraints

Purely physics-driven inversion scheme free of empirical relationships has been developed with the goal of inverting the noise-free PP-gathers for the model parameters, namely the exact ρ - AI - - quadruplet entering Zoeppritz formula. In order to achieve this goal, three scaler-independent angles were observed, two of which for the following conditions hold: 1) RC(θ) = 0, 2) RC(θ) = min. The third angle is the critical angle. Moreover, assuming that the scaler does not depend on the incident angle of the plane wave, it has been shown that its value can be accurately reconstructed.