Initial-model Construction for MVA Techniques

Migration is one of the main methods of imaging, and prior knowledge of the subsurface velocity is needed for its application. For iterative migration velocity analysis methods, good starting models are required. In this work, we compare two methods for the construction of initial models, being image-wave propagation and double path-integral migration. Both are able to generate an image migrated in time without an initial velocity model. We discuss the cost and benefit of each technique, as well as we evaluate the results before human intervention and interpretation.