A Stable Tomographic Solution for Anisotropic Epsilon ? A tool to aid in exploring for Oil in the Northern Carnarvon Basin

Abstract

AVO studies have typically been used in the search for gas on the North-West Shelf for decades, but its use for identifying oil filled reservoirs has been limited by the effective meaningful angle range obtainable from the seismic data. We have performed tomographic updates of the anisotropic parameter epsilon to obtain flatter and cleaner gathers out to a much higher angle range than traditional anisotropic assumptions. This then gives the ability to use the data for AVO much more effectively.