Energy-weighted AVO: a new AVO attribute

Abstract

Amplitude Variation with Offset (AVO) is a technique that has been widely used and proved to be a reliable indicator of hydrocarbons expression in seismic data. The technique uses mathematical approximations and approaches to estimate variations in seismic amplitude as function of incidence angle and relate them to lithology and fluids saturating the rocks in subsurface. In this work we introduce a new seismic attribute to investigate AVO anomalies associate with hydrocarbons. The Energy-weighted AVO (EAVO) attribute uses Zeoppritz approximations and exploits the fact that hydrocarbons-bearing sediments would show anomalous seismic responses relative to their backgrounds. The attribute attempts to emphasize hydrocarbons-associated effect and attenuate background signal. Unlike other conventional AVO attributes, the new attribute can be applied to both prestack and poststack data. We apply the attribute to synthetic data generated using Zoepprtitz equation and then we examine it on real detest. Intersting results have been obtained.