Residue analysis in linearized elastic inversion

Amplitude-versus-Offset (AVA) information is used for estimation of the elastic parameters. We introduce a method based on the linearized Zoeppritz equation to separate the linear AVA behavior from the nonlinear and noise terms, which we call the residue. This residue is used to analyze the influence of errors, noise and nonlinear terms on the resolution of the linear inversion. The problem of interference of thin layers has been addressed and a new method to avoid the apparent AVA due to this layering is shown.