Abstract：The GPU parallel program models,OpenCL and CUDA,have been widely applied in seismic modeling and migration.However both of them may destroy serial codes and need to redesign parallel algorithms.This paper introduces a new model OpenACC for reverse time migration.We realize multi-level parallelism between nodes,and inside the node by adding compiler instructions,which forms a more convenient and high-performance technique.After the communication optimization between nodes,this approach is used for the reverse time migration.Numerical experiments show that multi-level parallels can solve computation and storage problems for large-scale models.It can also dramatically improve computing efficiency after communication optimization.
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