Imperial College London
Alternate

Adrian Umpleby

Faculty of Engineering, Department of Earth Science & Engineering

 
 
 
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Contact

 

+44 (0)20 7594 6415a.umpleby Website

 
 
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Location

 

241Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Shah:2012:10.1190/segam2012-1228.1,
author = {Shah, N and Warner, M and Nangoo, T and Umpleby, A and Stekl, I and Morgan, J and Guasch, L},
doi = {10.1190/segam2012-1228.1},
pages = {2562--2566},
title = {Quality assured full-waveform inversion: Ensuring starting model adequacy},
url = {http://dx.doi.org/10.1190/segam2012-1228.1},
year = {2012}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - Successful full-waveform inversion (FWI) of 3D seismic data typically requires low-frequency content in the field data coupled with an accurate starting velocity model. In these circumstances, two fundamental questions always arise: (1) is the starting model sufficiently accurate given the data that are available, and (2) will the inversion iterate towards the global minimum, or will it instead become trapped locally leading to an erroneous final model? We present a robust and objective means to answer both these questions. The diagnostic feature that we use to achieve this is the spatial continuity of the phase difference between the predicted and observed field data, extracted at a single low frequency, after windowing in time around early arrivals. We show proof of principle on a simple 2D synthetic example, and demonstrate the application of quality assured full-waveform inversion (QA-FWI) to a full 3D field dataset that shows significant velocity anisotropy.
AU  - Shah,N
AU  - Warner,M
AU  - Nangoo,T
AU  - Umpleby,A
AU  - Stekl,I
AU  - Morgan,J
AU  - Guasch,L
DO  - 10.1190/segam2012-1228.1
EP  - 2566
PY  - 2012///
SP  - 2562
TI  - Quality assured full-waveform inversion: Ensuring starting model adequacy
UR  - http://dx.doi.org/10.1190/segam2012-1228.1
ER  -
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