Abstract: Based on S-wave spliting theory, this paper presents a converted-wave splitting analysis method for getting energy ratio using radial and transverse components of wide-azimuth converted-wave data, and proposed the layer stripping S-wave splitting technique for multi-layer fracture media. Firstly, the energy ratio method is used to obtain the azimuth and time delay of the first layer fracture medium. Then, the time delay is applied to compensation of slow-wave time delay. Lastly, the fast-wave and compensated slow wave are rotated back to original radial and transverse components. After the first fracture medium is converted into isotropic medium, the fractural parameters are obtained by lower multi-layer anisotropic media analysis. The technique has been applied to prediction of stratigraphic fractures in western Sichuan and good results have been acquired.

Key words: converted-wave, S-wave spltting, layer stripping, fast S wave, time delay