3D Reverse-Time Migration using the Excitation Amplitude Method on Xeon Phi Processors

We used four Xeon Phi processors for a parallel 3D time-domain reverse-time migration. The migration process is parallelized using the OpenMP and MPI on a four-node server connected with the OmniPath network. In order to exploit the 16 GB of high bandwidth memory of the Xeon Phi processor, we adopted the excitation amplitude imaging condition to avoid saving the full source wavefield. The excitation amplitude method uses the maximum amplitude wavefield only instead of the full wavefield. In numerical examples using the SEG/EAGE 3D overthrust and salt models, we could accelerate the migration process by saving the excitation amplitudes and the excitation times in the high bandwidth memory.