Converted-wave moveout equation analysis for a model with strong velocity decrease

The Li and Yuan (2001) approximation showed to be, in previous works, the most general and stable approximation created so far to perform the velocity analysis. For this reason its limitations were studied aiming to understand which kind of model could affect the quality of the results obtained with this approximation. It was previously studied about how a strong velocity increase and decrease could affect the quality of the curve fitting. However, in this work, we must test how the velocity decrease influences the quality of the velocity analysis once it was observed that the velocity decrease generates more difficulty to the procedure with the Li and Yuan (2001) approximation.