True-amplitude Angle Domain RTM Using Time-shift Imaging Condition under Complex Topographical Conditions

At present, the research about the accurate seismic imaging methods for the rugged topography surface, complex structure and complicated velocity distribution conditions is of great significance. Reverse time migration (RTM) is considered to be one of high accurate methods. In this paper, we propose true-amplitude angle domain RTM implementation algorithm under complex surface condition by incorporating the amplitude corrections and using the time-shift imaging condition based on the coordinate transformation. The results of synthetic data and real data demonstrate that our method can effectively suppress migration artifacts, and also deals with the tough seismic imaging problems resulting from topography, showing the strong adaptability and practicality of this method.