Pseudospectral 3-D Migration of Common-Offset Vector Gathers – Highly Parallel Algorithm
V. Lisitsa, A. Pleshkevich, D. Vishnevskiy, V. Levchenko and B. Moroz
Event name: 80th EAGE Conference and Exhibition 2018
Session: Seismic Imaging - Theory II
Publication date: 11 June 2018
Info: Extended abstract, PDF ( 1.08Mb )
Price: € 20
We present an original parallel algorithm for pre-stack migration based on the simultaneous solution of one-way wave equation (OWE) with multiple right-hand sides by means of the pseudospectral method. Presented approach allows us to migrate common-offset vector gathers by OWE migration. The algorithm implies multi-level of parallelism with the OWE is solved on GPU (one GPU for each subset of right-hand sides), images are constructed on CPU and stored in RAM (one cluster node for each image). Thus the algorithm the same functionality as modern Kirchhoff-based approaches but higher resolution and ability to deal with complex models. In contrary with RTM-like procedures, our approach allows constructing common-offset vector seismic images directly.