Abstract:Converted wave will have wide application prospects because of convenient data acquisition and low cost. Asymmetric converted wave trace gathering is made according to vp/vs ratio. The stack velocity of the converted wave is obtained using hyperbolic fitting method. Ap/Aps ratio section is made by compressing converted wave. vp/vs ratio section and Poisson's ratio section are produced after P-wave horizons are correlated with converted-wave horizons, Using these methods, we analyse and processed the real converted-wave data in YM area and acquired some useful informations which can not be obtained in common P-wavy exploratioiz.