Abstract: The thick and asymmetrical low-velocity belt of shear wave as well as low velocity of converted shear wave results in a great deal of converted wave static corrections and smart variations. This paper proposes a simple and feasible method for the converted wave static correction. The average velocity ratio of P-wave and S-wave is obtained by multi-component micro logging data. The converted wave long wavelength static correction is computed according to P-wave receiver statics and the ratio. The converted wave short wavelength static correction is gained by the difference between the fitted parabola time and the picked up reflection time through picking up clear reflection time on the dynamic correction shot gathers. The real data processing shows that this method can be used to solve the problem of converted wave static correction, and remarkably improve the quality of the converted wave records. The method has been applied to the 3D3C data processing in western Sichuan and good results have been obtained.

Key words: convered wave, static correction, parabola equation