Full Waveform Inversion Based on an Asymptotic Solution of Helmholtz Equation

Full Waveform Inversion Based on an Asymptotic Solution of Helmholtz Equation Full article

Journal

Geosciences
ISSN: 2076-3263

Output data

Year: 2023, Volume: 13, Number: 1, Article number : 19, Pages count : 13 DOI: 10.3390/geosciences13010019

Tags

full waveform inversion, asymptotic, frequency-dependent rays, Helmholtz equation

Authors

Protasov Maxim ¹ , Gadylshin Kirill ¹ , Neklyudov Dmitry ¹ , Klimes Ludek ²

Affiliations

1	Institute of Petroleum Geology and Geophysics, Siberian Branch of The Russian Academy of Sciences, 630090 Novosibirsk, Russia
2	Department of Geophysics, Faculty of Mathematics and Physics, Charles University, 180 00 Prague, Czech Republic

This study considers the full waveform inversion (FWI) method based on the asymptotic solution of the Helmholtz equation. We provide frequency-dependent ray tracing to obtain the wave field used to compute the FWI gradient and calculate the modeled data. With a comparable quality of the inverse problem solution as applied to the standard finite difference approach, the speed of the calculations in the asymptotic method is an order of magnitude higher. A series of numerical experiments demonstrate the approach’s effectiveness in reconstructing the macro velocity structure of complex media for low frequencies.

Protasov M. , Gadylshin K. , Neklyudov D. , Klimes L.
Full Waveform Inversion Based on an Asymptotic Solution of Helmholtz Equation
Geosciences. 2023. V.13. N1. 19 :1-13. DOI: 10.3390/geosciences13010019 РИНЦ

Submitted:	Nov 25, 2022
Accepted:	Jan 9, 2023
Published online:	Jan 12, 2023

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60584783

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