A pipeline approach for three dimensional time-domain finite-difference multi-parameter waveform inversion on GPUs
| Autor: | Huy Le, Biondo Biondi, Robert G. Clapp, Stewart A. Levin |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Offset (computer science)
Computer science 0208 environmental biotechnology Finite difference Inversion (meteorology) Domain decomposition methods 02 engineering and technology 010502 geochemistry & geophysics 01 natural sciences 020801 environmental engineering Computational science Arbitrarily large Time domain Computers in Earth Sciences Graphics Block size 0105 earth and related environmental sciences Information Systems |
| Zdroj: | Computers & Geosciences. 140:104503 |
| ISSN: | 0098-3004 |
| DOI: | 10.1016/j.cageo.2020.104503 |
| Popis: | We adopt a pipeline approach to accelerate 3D time-domain finite-difference waveform inversion codes using graphics cards, thus avoiding domain decomposition. The key designs include streaming through the volume one block at a time and propagating this block as many time steps as possible while it is on the device. This approach allows us to process an arbitrarily large volume with a single GPU, which is particularly suitable in a cloud environment where fast inter-nodal connection is not guaranteed. Moreover, two parameters, block size and number of updates, give users flexibility to adapt to available resources at hand. The most significant advantage that the pipeline approach offers is the ability to compute subsurface offset gathers on GPUs. We describe our implementation on the pseudo-acoustic anisotropic wave equations and show that the pipeline technique achieves nearly linear scaling with number of GPUs. Application to multi-parameter anisotropic inversion on a 3D field data improves the quality of seismic image and flatness of offset gathers. |
| Databáze: | OpenAIRE |
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