Acceleration strategies for elastic full waveform inversion workflows in 2D and 3D
Cita com:
hdl:2117/90998
Tipus de documentArticle
Data publicació2017-02-01
EditorSpringer International Publishing
Condicions d'accésAccés obert
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ProjecteGEAGAM - Geophysical Exploration using Advanced GAlerkin Methods (EC-H2020-644202)
HPC4E - HPC for Energy (EC-H2020-689772)
HPC4E - HPC for Energy (EC-H2020-689772)
Abstract
Full waveform inversion (FWI) is one of the most challenging procedures to obtain quantitative information of the subsurface. For elastic inversions, when both compressional and shear velocities have to be inverted, the algorithmic issue becomes also a computational challenge due to the high cost related to modelling elastic rather than acoustic waves. This shortcoming has been moderately mitigated by using high-performance computing to accelerate 3D elastic FWI kernels. Nevertheless, there is room in the FWI workflows for obtaining large speedups at the cost of proper grid pre-processing and data decimation techniques. In the present work, we show how by making full use of frequency-adapted grids, composite shot lists and a novel dynamic offset control strategy, we can reduce by several orders of magnitude the compute time while improving the convergence of the method in the studied cases, regardless of the forward and adjoint compute kernels used.
CitacióKormann, Jean [et al.]. Acceleration strategies for elastic full waveform inversion workflows in 2D and 3D. "Computational Geosciences", 22 Octubre 2016, p. 1-15.
ISSN1420-0597
Versió de l'editorhttp://link.springer.com/article/10.1007/s10596-016-9593-0
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Acceleration st ... ull waveform inversion.pdf | 3,479Mb | Visualitza/Obre |