Adaptive vertical nonuniform grid optimized elastic RTM

Reverse Time Migration (RTM) is a powerful imaging technique for complex geological structures, such as fault zones and salt bodies. However, its high computational cost and storage demands limit widespread adoption. We propose an adaptive vertical nonuniform grid optimized elastic RTM method to enhance computational efficiency and imaging accuracy. By dynamically adjusting vertical grid sampling intervals based on local velocity variations using coordinate transformation techniques, our method reduces imaging distortions in velocity-reversal regions while significantly lowering computational costs in high-velocity areas.