Abstract：By using Yang Shaoguo's power series expression of Zoeppritz's equation,the authors analyse AVO information content in the critical angle,and put forward multiwave multilayer AVO inversion.AVO inversion is speeded and improved because the series expression of Zoeppritz's equation is used to compute Jacobi matrix in inversion.Theoretical models are adopted to analyse rnultilayer P-P wave AVO inversion,joint multilayer AVO inversion of P-P arid P-SV waves and sequentially iterative AVO inver9ion of P-P and P-SV waves.The computation of ravtt data was done to bring quite good result.
