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New Developments of efficient geophysical tomography algortithms for exploring near-surface structures

English title New Developments of efficient geophysical tomography algortithms for exploring near-surface structures
Applicant Maurer Hansruedi
Number 153089
Funding scheme Project funding
Research institution Institut für Geophysik ETH Zürich
Institution of higher education ETH Zurich - ETHZ
Main discipline Geophysics
Start/End 01.05.2014 - 30.04.2016
Approved amount 119'928.00
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All Disciplines (3)

Discipline
Geophysics
Mathematics
Other disciplines of Physics

Keywords (4)

Seismics; Inversion ; Tomography ; Numerical modeling

Lay Summary (German)

Lead
Detaillierte Kenntnisse des untiefen Untergrunds sind von fundamentalem Interesse für (i) die Ausbeutung von natürlichen Ressourcen, (ii) die sichere Lagerung von gefährlichen Abfällen, (iii) grosse Bauprojekte und (iv) die Abschätzung von Naturgefahren. Geophysikalische Methoden bieten dazu leistungsfähige Werkzeuge. Insbesondere die sogenannte “volle Wellenforminversion” kann detaillierte Bilder des Untergrunds liefern, was mit den bisherigen Methoden nicht möglich war. Unser Forschungsprojekt ist der methodischen Weiterentwicklung von Wellenforminversionsalgorithmen gewidmet, die für seismische Daten geeignet sind.
Lay summary

Um dieses Ziel zu erreichen, haben wir unser Projekt in fünf Teilprojekte unterteilt. Teilprojekt 1 ist dem optimierten Experiment-Design gewidmet.

Hier werden optimale Sender-Empfänger Konfigurationen gesucht, die mit einem minimalen Aufwand maximale Untergrundinformation liefern.

Im Rahmen eines weiteren Teilprojekts werden die Effekte von der Oberflächentopographie auf seismische Daten untersucht. Teilprojekt 3 beschäftigt

sich mit der anelastischen Dämpfung von seismischen Wellen, die vor allem im untiefen Untergrund sehr ausgeprägt sein kann. Des Weiteren werden

systematische Fehler untersucht, die durch störende Seiteneffekte entstehen, wenn seismische Daten entlang Profilen aufgenommen werden. Schliesslich

werden im letzten Teilprojekt die neu erarbeiteten Technologien mit verschiedenen Feldatensätzen getestet.

Direct link to Lay Summary Last update: 10.07.2014

Responsible applicant and co-applicants

Employees

Name Institute

Publications

Publication
Optimizing measurement geometry for seismic near-surface full waveform inversion
Nuber André, Manukyan Edgar, Maurer Hansruedi (2017), Optimizing measurement geometry for seismic near-surface full waveform inversion, in Geophysical Journal International, 210(3), 1909-1921.
A synthetic study to assess the applicability of full-waveform inversion to infer snow stratigraphy from upward-looking ground-penetrating radar data
Schmid Lino, Schweizer Jürg, Bradford John, Maurer Hansruedi, Schmid Lino, Schweizer Jürg, Bradford John, Maurer Hansruedi, Schmid Lino, Schweizer Jürg, Bradford John, Maurer Hansruedi (2016), A synthetic study to assess the applicability of full-waveform inversion to infer snow stratigraphy from upward-looking ground-penetrating radar data, in Geophysics, 81(1), WA213-WA223.
Multidisciplinary geophysical investigations over an alpine rock glacier
Merz Kaspar, Maurer Hansruedi, Rabenstein Lasse, Buchli Thomas, Springman Sarah, Zweifel Matthias, Merz Kaspar, Maurer Hansruedi, Rabenstein Lasse, Buchli Thomas, Springman Sarah, Zweifel Matthias, Merz Kaspar, Maurer Hansruedi, Rabenstein Lasse, Buchli Thomas, Springman Sarah, Zweifel Matthias (2016), Multidisciplinary geophysical investigations over an alpine rock glacier, in Geophysics, 81(1), WA147-WA157.
Constructive optimization of electrode locations for target-focused resistivity monitoring
Wagner Florian, Günther Thomas, Schmitt-Hattenberger Conny, Maurer Hansruedi, Wagner Florian, Günther Thomas, Schmitt-Hattenberger Conny, Maurer Hansruedi, Wagner Florian, Günther Thomas, Schmitt-Hattenberger Conny, Maurer Hansruedi (2015), Constructive optimization of electrode locations for target-focused resistivity monitoring, in Geophysics, 80(2), E29-E40.
Enhancement of near-surface elastic full waveform inversion results in regions of low sensitivities
Nuber Andre, Maurer Hansruedi, Manukyan Edgar, Nuber Andre, Maurer Hansruedi, Manukyan Edgar, Nuber Andre, Maurer Hansruedi, Manukyan Edgar (2015), Enhancement of near-surface elastic full waveform inversion results in regions of low sensitivities, in Journal of Applied Geophysics, 122, 192-201.
Impact and mitigation of borehole related effects in permanent crosshole resistivity imaging: An example from the Ketzin CO 2 storage site
Wagner Florian, Bergmann Peter, Rücker Carsten, Wiese Bernd, Hattenberger-Schmitt Conny, Maurer Hansruedi, Labitzke Tim, Wagner Florian, Bergmann Peter, Rücker Carsten, Wiese Bernd, Hattenberger-Schmitt Conny, Maurer Hansruedi, Labitzke Tim, Wagner Florian, Bergmann Peter, Rücker Carsten, Wiese Bernd, Hattenberger-Schmitt Conny, Maurer Hansruedi, Labitzke Tim (2015), Impact and mitigation of borehole related effects in permanent crosshole resistivity imaging: An example from the Ketzin CO 2 storage site, in Journal of Applied Geophysics, 123, 102-111.
Joint inversions of three types of electromagnetic data explicitly constrained by seismic observations: results from the central Okavango Delta, Botswana
Kalscheuer Thomas, Blake Sarah, Podgorski Joel E, Wagner Frederic, Green Alan G, Maurer Hansruedi, Jones Alan G, Muller Mark, Ntibinyane Ongkopotse, Tshoso Gomotsang, Kalscheuer Thomas, Blake Sarah, Podgorski Joel E, Wagner Frederic, Green Alan G, Maurer Hansruedi, Jones Alan G, Muller Mark, Ntibinyane Ongkopotse, Tshoso Gomotsang, Kalscheuer Thomas, Blake Sarah, Podgorski Joel E, Wagner Frederic, Green Alan G, Maurer Hansruedi, Jones Alan G, Muller Mark, Ntibinyane Ongkopotse, Tshoso Gomotsang (2015), Joint inversions of three types of electromagnetic data explicitly constrained by seismic observations: results from the central Okavango Delta, Botswana, in Geophysical Journal International, 202, 1429-1452.
Towards Robust Acoustic Full Waveform Inversion
Manukyan E, Maurer H, Nuber A, Manukyan E, Maurer H, Nuber A, Manukyan E, Maurer H, Nuber A (2015), Towards Robust Acoustic Full Waveform Inversion, in EAGE annual meeting, EAGE, Den Haag, The Netherlands.
Improvements of elastic full waveform inversions using cross-gradient constraints
Manukyan Edgar, Maurer Hansruedi, Nuber André, Manukyan Edgar, Maurer Hansruedi, Nuber André, Manukyan Edgar, Maurer Hansruedi, Nuber André, Improvements of elastic full waveform inversions using cross-gradient constraints, in SEG Annual Meeting, SEG, Tulsa, U.S.A..
Landslide characterization using P- and S-wave seismic refraction tomography – the importance of elastic moduli
Uhlemann Sebastian, Hadedorn Steffen, Maurer Hansruedi, Gunn David, Chambers Jon, Dashwood B, Uhlemann Sebastian, Hadedorn Steffen, Maurer Hansruedi, Gunn David, Chambers Jon, Dashwood B, Uhlemann Sebastian, Hadedorn Steffen, Maurer Hansruedi, Gunn David, Chambers Jon, Dashwood B, Landslide characterization using P- and S-wave seismic refraction tomography – the importance of elastic moduli, in Journal of Applied Geophysics.
Topography Effects on Near-Surface Elas-tic Full Waveform Inversion
Nuber Andre, Maurer Hansruedi, Manukyan Edgar, Nuber Andre, Maurer Hansruedi, Manukyan Edgar, Nuber Andre, Maurer Hansruedi, Manukyan Edgar, Topography Effects on Near-Surface Elas-tic Full Waveform Inversion, in Geophysical Journal International.

Collaboration

Group / person Country
Types of collaboration
Seminar für Angewandte Mathematik, ETH Zürich Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Swiss Seismological Service Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
EAGE annual meeting Talk given at a conference Seismic full waveform inversion for characterizing near-surface structures: a review of potential problems and possible solutions 01.06.2016 Madrid, Spain Nuber André; Maurer Hansruedi;
EAGE annual meeting Talk given at a conference Towards robust acoustic full waveform inversion 01.06.2016 Madrid, Spain Nuber André; Maurer Hansruedi;
AGU Fall Meeting Talk given at a conference Removal of Trigger Delays from Cross-borehole Seismic Data by Exploiting Tube Wave Coherency - A Preprocessing Tool for Waveform Inversion 14.12.2015 San Francisco, United States of America Maurer Hansruedi;
SEG Honorary Lecturer Tour Individual talk The course of dimensionality in exploring the subsurface 10.09.2015 Vancouver, Canada Maurer Hansruedi;
IUGG Meeting Talk given at a conference Measurement of snow properties using upward -looking GPR applying (1) a combination with GPS technology and (2) full-waveform inversion 22.06.2015 Prague, Czech Republic Maurer Hansruedi;
EAGE Near-Surface Meeting Talk given at a conference Combined Inversion of Seismic Waveforms and Traveltimes for Acoustic Waves 16.06.2015 Amsterdam, Netherlands Nuber André; Maurer Hansruedi;
AIP Meeting Talk given at a conference Some improvements of seismic waveform inversion technologies 25.05.2015 Helsinki, Finland Maurer Hansruedi; Nuber André;
EGU Meeting Talk given at a conference Seismic monitoring with a shallow borehole-geophone array at the COSC-1 drilling site 13.04.2015 Wien, Austria Maurer Hansruedi;
AGU Fall Meeting Talk given at a conference Integrated Interpretation of Geophysical, Geotechnical, and Environmental Monitoring Data to Define Precursors for Landslide Activation. 15.12.2014 San Francisco, United States of America Maurer Hansruedi;


Self-organised

Title Date Place
Informal Workshop on Near-Surface Full Waveform Inversion 21.03.2016 Zürich, Switzerland

Awards

Title Year
SEG Distinguished Achievement Award (awarded to our research group) 2015
SEG Honorary Lecturer 2015

Associated projects

Number Title Start Funding scheme
157684 A wave propagation laboratory for immersive experimentation 01.12.2014 R'EQUIP
169107 Near-surface seismic full waveform inversion - novel tools for obtaining high-resolution subsurface images 01.07.2017 Project funding
132745 New Developments of efficient geophysical tomography algortithms for exploring near-surface structures 01.05.2011 Project funding

Abstract

Detailed knowledge of the uppermost few tens to a few hundred metres of the Earth is critical for managing natural resources, safely disposing of dangerous waste, constructing major building projects and devising appropriate countermeasures for natural hazards. Geophysical methods offer powerful tools for exploring the shallow subsurface, but the spatial resolution offered by these methods is often inadequate. Seismic waveform inversions offer the possibility for imaging relevant subsurface structures with an unprecedented resolution, but this methodology is still in its infancy, and a number of problems have to be solved before it can be applied as a standard tool. In particular, there are specific problems related with full waveform inversions of shallow seismic data that have not yet been addressed adequately. Our proposal includes five research tasks that are concerned with some of these problems that are judged to be particularly acute. Task 1 is devoted to experimental design. We will establish survey layouts that allow the full information content offered by seismic data to be exploited in a cost-effective manner. With task 2 we will address the problems of topography that can have a significant effect on shallow seismic data, and task 3 will be devoted to handling intrinsic attenuation of seismic waves. Since shallow seismic data are predominantly acquired along 2D profile lines, it is important to appraise possible influences of structural variations perpendicular to such profiles. This will be addressed with task 4. Finally, the novel developments will be tested with two existing data sets acquired in the Okawanga delta in Botswana and on the Rhone glacier in the central Swiss Alps, as well as with a new data set to be collected in an area where 3D effects are expected to be pronounced (task 5). With the completion of this project it will be possible to offer seismic waveform inversion algorithms that will be very helpful for solving a number of problems of high societal relevance.
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