Imperial College London
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ProfessorMikeWarner

Faculty of Engineering, Department of Earth Science & Engineering

Professor
 
 
 
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Contact

 

+44 (0)20 7594 6535m.warner

 
 
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Assistant

 

Ms Daphne Salazar +44 (0)20 7594 7401

 
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Location

 

RSM 1.46CRoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Calderon:2018:10.1190/GEO2017-0063.1,
author = {Calderon, Agudo O and Vieira, Da Silva N and Warner, M and Morgan, J},
doi = {10.1190/GEO2017-0063.1},
journal = {Geophysics},
pages = {R257--R271},
title = {Acoustic full-waveform inversion in an elastic world},
url = {http://dx.doi.org/10.1190/GEO2017-0063.1},
volume = {83},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Full-waveform inversion (FWI) is a technique used to obtain high-quality velocity models of the subsurface. Despite the elastic nature of the earth, the anisotropic acoustic wave equation is typically used to model wave propagation in FWI. In part, this simplification is essential for being efficient when inverting large 3D data sets, but it has the adverse effect of reducing the accuracy and resolution of the recovered P-wave velocity models, as well as a loss in potential to constrain other physical properties, such as the S-wave velocity given that amplitude information in the observed data set is not fully used. Here, we first apply conventional acoustic FWI to acoustic and elastic data generated using the same velocity model to investigate the effect of neglecting the elastic component in field data and we find that it leads to a loss in resolution and accuracy in the recovered velocity model. Then, we develop a method to mitigate elastic effects in acoustic FWI using matching filters that transform elastic data into acoustic data and find that it is applicable to marine and land data sets. Tests show that our approach is successful: The imprint of elastic effects on the recovered P-wave models is mitigated, leading to better-resolved models than those obtained after conventional acoustic FWI. Our method requires a guess of VP/VS and is marginally more computationally demanding than acoustic FWI, but much less so than elastic FWI.Read More: https://library.seg.org/doi/10.1190/geo2017-0063.1
AU  - Calderon,Agudo O
AU  - Vieira,Da Silva N
AU  - Warner,M
AU  - Morgan,J
DO  - 10.1190/GEO2017-0063.1
EP  - 271
PY  - 2018///
SN  - 1942-2156
SP  - 257
TI  - Acoustic full-waveform inversion in an elastic world
T2  - Geophysics
UR  - http://dx.doi.org/10.1190/GEO2017-0063.1
UR  - http://hdl.handle.net/10044/1/58821
VL  - 83
ER  -
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