Nonlinear AVA Inversion Based on a Novel Quadratic Approximation for Fluid Discrimination

<div>Comparison of reflection coefficients calculated by the exact Zoeppritz equations, Aki–Richards approximation, Russell linear approximation, and the new quadratic approximation of model 1. (a) Reflection coefficients calculated by different formulas; (b) difference of the reflection coefficients between the exact Zoeppritz equations and their three approximations, respectively.</div>

Geofluids

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Figure 1

Figure 1: Nonlinear AVA Inversion Based on a Novel Quadratic Approximation for Fluid Discrimination 