Efficient wavefield reconstruction at half the Nyquist rate-Reference-Cited by-同舟云学术

Efficient wavefield reconstruction at half the Nyquist rate

Published:2019-09-01 Issue:5 Volume:84 Page:A43-A46
ISSN:0016-8033
Container-title:GEOPHYSICS
language:en
Short-container-title:GEOPHYSICS

Author:

Gholami Ali¹^ORCID,Richardson Alan²,Zand Toktam¹,Malcolm Alison³^ORCID

Affiliation:

1. University of Tehran, Institute of Geophysics, Tehran, Iran..

2. Ausar Geophysical, Dalkey, Ireland..

3. University of Newfoundland, Department of Earth Sciences, St. John’s, Canada..

Abstract

We have developed a simple method to halve the memory required to store the forward wavefield for the imaging condition in adjoint-state methods such as reverse time migration and full-waveform inversion. It stores the wavefield at only half the Nyquist rate, and it uses the wave equation to calculate the second time derivative, allowing approximate reconstruction of the forward wavefield at the required Nyquist rate. We have determined that the method produces an image with the Marmousi model that is not visibly different compared to a traditional (full Nyquist) implementation.

Publisher

Society of Exploration Geophysicists

Subject

Geochemistry and Petrology,Geophysics

Link

https://library.seg.org/doi/pdf/10.1190/geo2019-0122.1

Reference20 articles.

1. Time-reversal checkpointing methods for RTM and FWI

2. Reverse time migration

3. Efficient iterative viscoacoustic linearized inversion

4. Wavefield compression for adjoint methods in full-waveform inversion

5. III-posed sampling theorems

Cited by 9 articles. 订阅此论文施引文献订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献

1. Full waveform inversion and Lagrange multipliers;Geophysical Journal International;2024-04-19

2. Integrated Algorithm for High‐Resolution Crustal‐Scale Imaging Using Complementary OBS and Streamer Data;Earth and Space Science;2024-02

3. Efficient source wavefield reconstruction for full-waveform inversion;GEOPHYSICS;2023-10-11

4. Improving the memory efficiency of RTM using both Nyquist sampling and DCT based on GPU;Journal of Geophysics and Engineering;2022-07-29

5. Zero-offset data estimation using CNN for applying 1D full waveform inversion;Journal of Geophysics and Engineering;2022-01-28