The reflection coefficient and phase in thin VTI medium

On the basis of wave equation,this article derive out reflection coefficient and the phase character of plane P-wave,which generated on the interface of VTI medium in thin sand shale interbedding.And the result indicates that reflection coefficient is affected by its phase and it could get phase rotation about -90°,what prove Zeng's conclusion theoretically.Both numerical experiment of model and results of practice data processing indicate seismic reflection waves have obvious different character in thick and thin layer.So the reservoir forecast and detection of hydrocarbon,which are widely used techniques presently,such as AVO and wave impedance inversion,all need to consider and complete the influence of thin layer.