Stéphane Operto
Born 25/11/1966 in Monaco; Married, three children
Scientific interests
Geophysics: Seismic modeling, inverse problem theory, seismic imaging by least-squares migration and full waveform inversion, seismic data processing, processing and inversion of land and ocean bottom seismic data
Education & carreer
2014 - present: Senior research scientist CNRS
Dec 2006: "Habilitation à diriger les recherches"
2001 - 2014: Research scientist (rank 1) CNRS, Geoazur Institute
1998 - 2001: Research scientist (rank 2) CNRS, Geoazur Institute
1991-1995: Ph.D. Marine Geophysics, \emph{Structure and origine of the submarine Kerguelen plateau (austral Indian ocean): geodynamical implications. Modeling of marine wide-angle seismic data, University Paris 6
1990-1991: M. Sc. Géodynamique des marges océaniques et des chaines de montagne, University of Nice
1986--1989: Engineering degree, Ecole Nationale Sup\'erieure des Arts et Métiers (ENSAM), Aix-en-Provence, Paris
Professional experience
1998--Present: CNRS research scientist, Geoazur Institute, Sophia-Antipolis, France
1996--1997: Post-doctoral fellow, Institute for Geophysics, Ecole des Mines de Paris, Fontainebleau, France
1995--1996: Post-doctoral fellow, Institute for Geophysics, University of Texas, Austin, United States
Honors & Awards
2014: Honorable mention in the category of Best paper in Geophysics for "Computationally-efficient three-dimensional acoustic finite-difference frequency-domain seismic modeling in vertical transversely isotropic media with sparse direct solver" by S. Operto et al.
2011: Geophysics bright spots for "Joint ray+Born least-squares migration and simulated annealing optimization for target-oriented quantitative seismic imaging", (co-authored with A. Ribodetti, W. Agudelo, J. Y. Collot and J. Virieux)
2009, 2012: Outstanding reviewer Geophysical Journal International
2009: Geophysics bright spots for "Seismic imaging of complex onshore structures by two-dimensional elastic frequency-domain full waveform inversion", (co-authored with R. Brossier and J. Virieux)
2008: Best paper in Geophysics for "Velocity model-building by 3D frequency-domain full-waveform inversion of wide-aperture seismic data", (co-authored with Hafedh Ben Hadj Ali and Jean Virieux)
2006: Top 30 presentation at SEG Annual Meeting for "3D frequency-domain finite-difference modeling of acoustic wave propagation using a massively parallel direct solver: a feasibility study" (co-authored with J. Virieux, P. Amestoy, J. -Y. L'Excellent) and "2D fine-scale velocity model of the subduction channel in Gulf of Guayaquil by integrated PSDM and simulated annealing optimization" (co-authored with A. Ribodetti, W. Agudelo, J. -Y. Collot)
2005: Louis Cagniard Award, EAGE, Best poster presentation Annual Meeting, Madrid 1995 (co-authored with J. Virieux and J. -X. Dessa).
1995: AGU Highlights for "Multiscale seismic imaging of the eastern Nankai trough by full waveform inversion (co-authored with J. X. Dessa, S. Kodaira, A. Nakanishi, G. Pascal, J. Virieux and Y. Kaneda).
Post-doctoral fellows & Students advised
Ph.D.
2002: Bernhard Hustedt (Main supervisor: J. Virieux), Ph. D., Propagation des ondes: approches espace et ondelettes, University of Nice
2003: Céline Ravaut (supervisor: S. Operto), Ph. D., Tomographie sismique haute r\'esolution de la croute terrestre: inversion combinée des temps de trajet et des formes d'ondes de donn\'ees de sismique réfraction - réflexion grand-angle multitrace, University Paris 6
2009: Romain Brossier (co-supervisors: S. Operto & J. Virieux), Ph. D., Imagerie sismique à deux dimensions des milieux visco-élastiques par inversion des formes d'ondes : développements méthodologiques et applications, University of Nice
2009: Hafedh Ben Hadj Ali (co-supervisors: S. Operto & J. Virieux), Ph. D., Three dimensional visco-acoustic frequency-domain full waveform inversion, University of Nice
2011: Vincent Etienne (co-supervisors: S. Operto & J. Virieux), Ph. D., Modélisation des ondes sismiques dans des milieux élastiques 3D : application à l'inversion des formes d'onde., University of Nice}
2012: Vincent Prieux (co-supervisors: S. Operto & J. Virieux), Ph. D., Imagerie du champ pétrolier de Valhall par inversion des formes d'onde élastique, University of Nice
2012: Guanghui Hu (co-supervisors: S. Operto & J. Virieux), Ph. D., Imagerie 3D du champ pétrolier de Valhall par inversion des formes d'onde 3D, University of Grenoble
2012: Yaser Gholami (co-supervisors: S. Operto & A. Ribodetti), Ph. D., Imagerie des milieux anisotropes par inversion de formes d'onde, University of Nice
2012: Damien Pageot (co-supervisors: S. Operto & M. Vallée), Ph. D., Imagerie lithosphérique à partir de données télésismiques par inversion des formes d'onde, University of Nice
2014: Clara Castellanos (supervisor: S. Gaffet & S. Operto), Ph. D., Méthodes de régularisation et encodage de sources en inversion des formes d'ondes, University of Nice
2017: Stephen Beller (supervisors: S. Operto, V. Monteiller, G. Nolet), Ph. D., Lithospheric imaging from teleseismic data by full waveform inversion, University of Nice
2016: Wei Zhou (supervisors: R. Brossier, S. Operto, J. Virieux), Ph. D., Velocity model building from seismic reflection data by full waveform inversion, Université Joseph Fourier
2017: Borhan Tavakoli (supervisors: A. Ribodetti, J. Virieux, S. Operto): Adjoint slope tomography
Ongoing: Serge Sambolian (supervisors: S. Operto & A. Ribodetti): Adjoint slope tomography
Ongoing: Hossein Aghamiry (supervisors: A. Gholami & S. Operto): FWI with TV regularization and waveform reconstruction
Post-doctoral fellows
2001-2003 Jean-Xavier Dessa, post-doctoral fellow
2005-2006 Matthieu Delost, post-doctoral fellow
2005-2008 Florent Sourbier, research enginneer in computational geosciences
2010-2012Vincent Etienne, research enginneer in computational geosciences
2013-2016: Vadim Monteiller, research engineer
Master degrees
2009: Amedi Blessing (M1, MathMods, ERASMUS Mundus)}
2009: Jade Rachel Garcia (M1, MathMods, ERASMUS Mundus)}
2008: Vincent Prieux (M2P, G\'eosciences, Exploration et Risques, Grenoble University)
Research funding and project management
2006 -- 2011: co-PI (with J. Virieux) of the petroleum SEISCOPE consortium (http://seiscope.oca.eu) funded by BP, CGGVeritas, ENI, ExxonMobil, PETROBRAS, SaudiAramco, Shell, Statoil, Total (industry funding)
2005 -- 2009: PI of the SEISCOPE ANR project (Academic funding), 450Keuros
2005-2006:DYETI, seismic tomography of the crust from wide-angle seismic data
2002-2005: ATIP "jeunes chercheurs"
2002: OCEANS, processing of OBS data from the SFJ-OBS experiment.
1998: ACI "Jeunes chercheurs"
Invited seminars
21/06/2018: Next leap forward in seismic imaging of the earth's crust: 3D Full Waveform Inversion of 4C OBS data, SEISMIX2018, Poland.
5/11/2015: Full Waveform Inversion (FWI): The quest for resolution in seismic imaging & tomography, Journées
Scientifiques de l’Observatoire de la Côte d’Azur, Nice.
14/10/2015: Full Waveform Inversion (FWI): The quest for resolution in earthquake seismology: Application to
lithospheric imaging from teleseismic data, Workshop RESIF, La Grande Motte.
31 mars 2015: SEG FWI Workshop: filling the gaps, Abu Dhabi, Keynote speaker, Efficient 3D frequency-domain FWI of OBC data
with sparse direct solver: a real data case study from the North Sea
22 mars 2015: Workshop Multi-scale waveform modeling & Inversion, KAUST UNiversity, Efficient 3D frequency-domain FWI of OBC data
with sparse direct solver: a real data case study from the North Sea
7 février 2014: Seismic imaging of the Earth interior by Full Waveform Inversion (FWI): from theory to practice. S. Operto, Séminaire MAD (Mathématiques pour l'analyse de données), Observatoire de la Côte d'Azur.
23/4/2014: 3D finite-difference frequency-domain visco-acoustic wave modeling in VTI media with sparse direct solvers: application to seismic imaging. Congrès Français d’Acoustique, Poitiers.
September 2013: Multiparameter full waveform inversion of multicomponent data: what have we learnt from the Valhall case study, R. Brossier, C. Castellanos, Y. Gholami, L. Métivier, S. Operto, V. Prieux, A. Ribodetti and J. Virieux, Workshop of the Society of Exploration Geophysics, W11 Advances in model building, imaging and FWI
August 2013, keynote speaker: Multiparameter full waveform inversion with multicomponent data: some insights from the Valhall case study, S. Operto, R. Brossier, C. Castellanos, Y. Gholami, L. Métivier, V. Prieux, A. Ribodetti and J. Virieux, 13th International Congress of the Brazilian Geophysical Society, Rio de Janeiro
Teaching experience
2006: Summer school on global-offset seismic imaging - Lectures on finite-difference frequency-domain seismic modeling and full waveform inversion (http://seiscope.oca.eu/spip.php?rubrique20)
2012: Training course on seismic modeling and full waveform inversion (30 hours) - PETROBRAS, Rio de Janeiro, Brazil
Editorial service
2013--present: Associate Editor at Geophysics
2009: Guest Associate Editor at Geophysics for the special issue on "New advances on seismic imaging and inversion"
Reviewer: Geophysics, Geophysical Prospecting, Geophysical Journal International, Journal of Geophysical Research, Computer & Geosciences, Geophysical Reseach Letters, PAGEOPH.
Graduate commitees
2009 (examiner) R. E. Plessix, HDR., University of Grenoble
2009 (reviewer) R. Madec, Ph. D., University of Pau
2009 (reviewer) L. M\'etivier, Ph. D., University Paris 13
2010 (examiner) F. Bretaudeau, Ph. D., University of Nantes
2010 (examiner) H. Chauris, HDR., University of Paris 6 - Mines ParisTech
2010 (guest) A. Rhomdane, Ph. D., University of Paris 6
2010 (examiner) E. Maufroy, University of Nice
2011 (external reviewer) L. Guasch, Imperial College, London
2014 (reviewer) D. Borisov, University of Paris 6 - IPGP
2015 (examiner) F. Wang, Mines ParisTech
2016 (external reviewer) G. Huot, University of Paris 6 - IPGP
2018 (examiner) A. Buttari, HDR, ENSEEIHT
2019 (reviewer) Y. Lu, PhD, University of Grenoble Alpes
Workshop
2008: Workshop of the annual EAGE meeting, Roma - Full waveform inversion - current status and perspectives (with Wim Mulder and René-Edouard Plessix)
Professional membership
EAGE, SEG,SIAM.
Field experience (marine seismic cruises)
2002: MEDISIS cruise - Multichannel seismic (MCS) reflection experiment, Nil delta and Mediterannean ridge. Chief scientist: J. Mascle
2000: SISTEUR cruise - MCS and OBS refraction surveys, offshore Equador - Colombia subduction margins. Co-chief scientists: J.Y. Collot and Ph. Charvis
1999: GEOLIG2D cruse - OBS seismic refraction survey, offshore Ligurian basin. Chief scientist: S. Operto
1995: TAICRUST experiment. MCS and OBS seismic surveys, offshore Taiwan. Co-chief scientists: Yosio Nakamura et T-K Wang
1995: TICOSECT experiment (UTIG-GEOMAR). OBS survey offshore Costa Rica. Chief scientist : Kirk McIntosh
1993: REUSIS cruise - MCS and OBS surveys, offshore Reunion island. Co-chiefs scisntists: Philippe Charvis and Béatrice de Voogdt
1991: MD/66 KeOBS experiment. OBS survey over submarine Kerguelen plateau. Chief scientist: Philippe Charvis
Scientific production
79 peer-reviewed articles.
6 book chapters.
105 conference proceedings.
h index: 31 (Isi Web of knowledge), 35 (Research Gate), 42 (Google scholar).