Combined Wide-Angle and Reflection Velocity Images via the Tau-P Domain - a Sub-Basalt Application

P176 COMBINED WIDE-ANGLE AND REFLECTION VELOCITY IMAGES VIA THE TAU-P DOMAIN – A SUB-BASALT APPLICATION Summary 1 Reflections and refractions from wide-angle densely sampled multi channel streamer data are transformed automatically to the slowness-depth domain using a downward continuation algorithm. The method may be used to rapidly obtain velocity functions for use in pre-stack depth migration processes. Incorporation of the reflection data has the potential to produce velocity images in complex geological areas such as those associated with basalt layers. Introduction Refraction and reflection data are generally treated separately one part of the data set being discarded or treated as