Imperial College London
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DrRebeccaBell

Faculty of Engineering, Department of Earth Science & Engineering

Reader in Tectonics
 
 
 
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Contact

 

+44 (0)20 7594 0903rebecca.bell

 
 
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Location

 

2.37aRoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Morgan:2013:gji/ggt345,
author = {Morgan, JV and Warner, MR and Bell, R and Ashley, J and Barnes, D and Little, R and Roele, K and Jones, C},
doi = {gji/ggt345},
journal = {Geophysical Journal International},
title = {Next-generation seismic experiments: wide-angle, multi-azimuth,three-dimensional, full-waveform inversion},
url = {http://dx.doi.org/10.1093/gji/ggt345},
volume = {in press},
year = {2013}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Full-waveform inversion (FWI) is an advanced seismic imaging technique that has recentlybecome computationally feasible in three dimensions, and that is being widely adopted andapplied by the oil and gas industry. Here we explore the potential for 3-D FWI, when combinedwith appropriate marine seismic acquisition, to recover high-resolution high-fidelity P-wavevelocity models for subsedimentary targets within the crystalline crust and uppermost mantle.We demonstrate that FWI is able to recover detailed 3-D structural information within aradially faulted dome using a field data set acquired with a standard 3-D petroleum-industrymarine acquisition system. Acquiring low-frequency seismic data is important for successfulFWI; we show that current acquisition techniques can routinely acquire field data from airgunsat frequencies as low as 2 Hz, and that 1 Hz acquisition is likely to be achievable using oceanbottomhydrophones in deep water. Using existing geological and geophysical models, weconstruct P-wave velocity models over three potential subsedimentary targets: the Soufri`ereHills Volcano on Montserrat and its associated crustal magmatic system, the crust and uppermostmantle across the continent–ocean transition beneath the Campos Basin offshore Brazil,and the oceanic crust and uppermost mantle beneath the East Pacific Rise mid-ocean ridge.Weuse these models to generate realistic multi-azimuth 3-D synthetic seismic data, and attempt toinvert these data to recover the original models.We explore resolution and accuracy, sensitivityto noise and acquisition geometry, ability to invert elastic data using acoustic inversion codes,and the trade-off between low frequencies and starting velocity model accuracy.We show thatFWI applied to multi-azimuth, refracted, wide-angle, low-frequency data can resolve featuresin the deep crust and uppermost mantle on scales that are significantly better than can beachieved by any other geophysical technique, and that these results ca
AU  - Morgan,JV
AU  - Warner,MR
AU  - Bell,R
AU  - Ashley,J
AU  - Barnes,D
AU  - Little,R
AU  - Roele,K
AU  - Jones,C
DO  - gji/ggt345
PY  - 2013///
TI  - Next-generation seismic experiments: wide-angle, multi-azimuth,three-dimensional, full-waveform inversion
T2  - Geophysical Journal International
UR  - http://dx.doi.org/10.1093/gji/ggt345
VL  - in press
ER  -
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