We investigate the sensitivity of AVO attributes to uncertainty in migration velocity in a synthetic dataset. The synthetic data was built using a earth model with typical rock properties from a real North Sea turbidite field. The model includes a thick overburden layer with complex velocity anomalies. We examine the sensitivity of AVO response due to the presence of this complex layer and quantify the influence of migration velocity errors in the AVO signature. Results show that AVO gradient attribute is more sensitive to velocity errors than AVO intercept attribute. For velocity errors up to 5% we see a maximum of AVO intercept errors of , whereas for velocity errors of only 1%, the inversion of AVO gradient attribute has an error of 185%. Further work is needed to evaluate the influence of observed boundary artifacts on these results.