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Workshop description

In the recent years, the research on seismic/electromagnetic interferometry has been greatly diversified and several groups – both in academia and industry – become more active in these developments. Since the SEG workshop in 2005, geophysicists have shown novel and exciting progresses, using numerical, laboratory and field datasets. The recent innovations are not limited to new imaging possibilities, but also extend to new approaches for characterization and monitoring of the subsurface. It is time for another research workshop where these exciting developments can be discussed among the geophysicists.

Since the SEG-2005 workshop, it has been shown that the interferometric retrieval could be achieved not only between two receivers, but also between two sources or a source and a receiver, where the receiver has not recorded a response from that source (source-receiver interferometry). As an alternative to interferometry by cross-correlation, also interferometry by coherence, deconvolution, multidimensional deconvolution and convolution was introduced. The latter two methods can be applied to media with intrinsic losses to retrieve the correct impulse response between the two points of measurement. When the assumptions behind utilization of the interferometry method by cross-correlation are not fulfilled, for example when the sources do not effectively enclose the receivers or in the presence of intrinsic losses, next to the physical arrivals, also non-physical arrivals would be retrieved. Such non-physical arrivals could be compensated/eliminated by multidimensional or source-receiver interferometry, depending on the application. However, some of the non-physical events could be quite useful. For example, the virtual or supervirtual refractions could be used for characterization of the near surface, while the ghost reflections could be used to monitor layer-specific changes of velocity in the subsurface. The ghost reflection could also be used for source and receiver interpolation when they are convolved in a second step with other recordings. Based on source-receiver interferometry, new non-linear imaging techniques have recently been proposed. The development of the Marchenko imaging goes beyond retrieval of the reflection response between two receivers – it enables the retrieval of the reflection response between a physical source at the surface and a virtual receiver in the subsurface, i.e., at positions where neither a source nor a receiver were present.

The above-mentioned research and other developments related to interferometry have taken place in different research groups but also in groups in the industry. This workshop aims at bringing these groups together to share their recent experiences and know-how.
 

Programme

Session   Imaging Using Interferometric Methods
09:30   Introduction
09:35 Oral

WS15-A01 Nonlinear Interferometric Imaging

A. Curtis* (University of Edinburgh)

10:05 Poster

WS15-P01 A Study on the Effect of Least-squares Datuming on VSP Multiple Imaging 

A. Aldawood* (King Abdullah University of Science & Technology), I. Hoteit (King Abdullah University of Science & Technology), G. Turkiyyah (King Abdullah University of Science & Technology) & T. Alkhalifah (King Abdullah University of Science & Technology)

10:25 Poster

WS15-P02 A Review of Tangent-phase Interferometry Method and Applications

F. Poletto* (OGS), B. Farina (OGS) & G. Böhm (OGS)

10:45 Poster

WS15-P03 Use of Seismic Interferometry to Improve the Imaging of a Heterogeneous Landfill

L.A. Konstantaki (Delft University of Technology), D. Draganov* (Delft University of Technology), R. Ghose (Delft University of Technology) & T. Heimovaara (Delft University of Technology)

11:05   Coffee break
11:25 Oral

WS15-A02 Creating Virtual Receivers from Drill-bit Noise 

Y. Liu* (Norwegian University of Science and Technology), D. Draganov (Delft University of Technology), K. Wapenaar (Deflt University of Technology) & B. Arntsen (Norwegian University of Science and Technology)

11:45 Oral

WS15-A03 Imaging Near-surface Heterogeneities by Natural Migration of Back-scattered Surface Waves

A. AlTheyab* (King Abdullah University of Science and Technology), E. Workman (University of Utah), F.C. Lin (University of Utah) & G.T. Schuster (King Abdullah University of Science and Technology)

12:05   Discussion session
12:25   Lunch break
Session   Characterization Using Interferometric Methods
13:25 Oral

WS15-B01 Quantifying the Reduction in Uncertainty Obtained Through Interferometric Techniques

O. Poliannikov* (Massachusetts Institute of Technology)

13:55 Oral

WS15-B02 4D Surface Wave Tomography Using Ambient Seismic Noise

F. Duret* (CGG) & E. Forgues (CGG)

14:15 Oral

WS15-B03 Estimating the Location of a Tunnel Using Interferometric Times of Rayleigh-wave Scattering

A. Kaslilar* (Istanbul Technical University), U. Harmankaya (Istanbul Technical University), K. Wapenaar (Delft University of Technology) & D. Draganov (Delft University of Technology)

14:35 Poster

WS15-P04 Scatterer Characterization from Correlated Surface Wave Coda

T.E. Blum* (ETH Zurich), T.D. Mikesell (MIT), K. van Wijk (University of Auckland), R. Snieder (Colorado School of Mines) & H. Sato (Tohoku University)

14:55 Poster

WS15-P05 Analysis of Rayleigh Wave Ellipticity in the Iberian Peninsula and Morocco Using Ambient Noise and Teleseismic Records

C. Gómez-García (Earth Sciences Institute Jaume Almera, CSIC), A. Villaseñor (Earth Sciences Institute Jaume Almera), A. Ugalde* (Earth Sciences Institute Jaume Almera) & B. Gaite (Earth Sciences Institute Jaume Almera)

15:15   Discussion session
15:35   Coffee break
Session   Monitoring Using Interferometric Methods
15:55 Oral

WS15-C01 Ambient Seismic Imaging for Permanent-continuous Monitoring

S. de Ridder* (University of Edinburgh)

16:25 Oral

WS15-C02 Feasibility Study of Seismic Interferometry for CO2 Storage Monitoring - An Example from the Ketzin Site

F. Zhang* (Uppsala University), C. Juhlin (Uppsala University), D. Sopher (Uppsala University), F. Huang (Uppsala University) & S. Lueth (Deutsches GeoForschungsZentrum GFZ)

16:45 Oral

WS15-C03 Feasibility of Retrieving Time-lapse Reflection Signals Using Ambient-noise Seismic Interferometry at Ketzin, Germany

B. Boullenger* (Delft University of Technology), A. Verdel (TNO, Sustainable Geo-Energy), B. Paap (TNO, Sustainable Geo-Energy), J. Thorbecke (Delft University of Technology) & D. Draganov (Delft University of Technology)

17:05   Discussion session
17:25   Wrap-up and closing