Research Note: Overpressure prediction from C‐wave seismic data

Abstract

A B S T R A C TRecently, mode converted shear waves (C-waves) have been shown to enable overpressure prediction in media where primary wave acquisition is inhibited by gas and fluid effects -C-wave moveout is analysed and a long standing relationship between differential stress and primary-wave (P-wave) velocity is modified and employed. Though pore-pressure prediction based on C-waves is supported by empirical evidence from laboratory and field experiments, a theoretical justification has yet to be developed. In this research note, we provide a supporting algebra for the original relationship between pore pressure and C-wave velocity.