Research

Discrete Seismic Tomography

The interior of the earth can be imaged using seismic waves by solving a non-linear inverse problem. Such images are the main tool for locating oil and gas reservoirs in geologically complex areas. Of special interest are subsurface salt bodies, as reservoirs are often found next to or underneath them. Resolving such salt bodies is challenging and new techniques are needed to obtain better images of the structures beneath the salt. We aim to develop such techniques by including prior information in the reconstruction; salt bodies are continuous objects with (known) constant properties. The reconstruction of such objects is the subject of discrete tomography, and effective algorithms have been developed for linear inverse problems in tomography. Generalizing these techniques to non-linear problems, we can obtain more accurate estimates of the shape of the salt bodies and the properties of the earth layers beneath them.

The Project is funded by Industrial Collaboration of the Foundation for Fundamental Research on Matter (NWO-FOM) and Shell. It is a part of Industrial Partnership Program (IPP) ‘Computational Sciences for Energy Research.’

Research Interests:

1. Non-linear inverse problems
2. Regularization
3. Level-set methods
4. Seismic Inversion

Journal Publications

1. Ajinkya Kadu, Tristan van Leeuwen
   A Convex Formulation for Discrete Tomography
   submitted to IEEE Transactions on Computational Imaging (TCI)
   ArXiv Paper

2. Ajinkya Kadu, Tristan van Leeuwen, Wim Mulder
   Salt Reconstruction in Full Waveform Inversion with a Parametric Level-Set Method
   IEEE Transactions on Computational Imaging (TCI), 2017.
   ArXiv Project Page Paper Code

Conference Proceedings

1. Ajinkya Kadu, Rajiv Kumar, Tristan van Leeuwen
   Full-waveform Inversion with Mumford-Shah regularization[ORAL]
   Society of Exploration Geophysics (SEG) Annual Meeting, 2018.
   Paper

2. Ajinkya Kadu, Rajiv Kumar
   Decentralized Full Waveform Inversion [POSTER]
   European Association of Geoscientists and Engineers (EAGE) Annual Meeting, 2018
   Project Page Paper

3. Ajinkya Kadu, Tristan van Leeuwen, K. Joost Batenburg
   A parametric level-set method for partially discrete tomography [ORAL]
   International Conference on Discrete Geometry for Computer Imagery (DGCI), 2017.
   ArXiv Project Page Code

4. Ajinkya Kadu, Wim Mulder, Tristan van Leeuwen
   Parametric Level-Set Full-Waveform Inversion in the Presence of Salt-Bodies [ORAL]
   Society of Exploration Geophysics (SEG) Annual Meeting, 2017.
   Paper Project Page

5. Ajinkya Kadu, Tristan van Leeuwen, Wim Mulder
   A parametric level-set approach for seismic full-waveform inversion [ORAL]
   Society of Exploration Geophysics (SEG) Technical Program Expanded Abstracts, 2016.
   Paper Project Page

News Articles

1. Tristan van Leeuwen, Ajinkya Kadu, Wim Mulder
   Geometric Imaging for Subsurface Salt Bodies
   European Research Consortium Informatics & Mathematics (ERCIM) News
   Article Project Page

Activities - Conferences, Workshop, etc

1. SEG Annual Meeting, Anaheim, California, USA Slides
2. EAGE Annual Meeting, Copenhagen, Denmark. June 11 - 14, 2018 Poster
3. SIAM Conference on Imaging Science, Bologna, Italy. June 5 - 8, 2018 Slides
4. Houston Imaging Sciences Symposium, Houston, TX, USA - October 2 & 3, 2017 Poster
5. SEG Annual Meeting, Houston, TX, USA - Sep 24 to 29, 2017 Slides
6. 20^th International Conference on Discrete Geometry for Computer Imagery, Vienna, Austria - Sep 19 to 21, 2017 Slides
7. SIAM Conference on Mathematical and Computational Issues in Geosciences, Erlangen, Germany - Sep 11 to 14, 2017 Slides
8. Bayesian and Nonlinear Inverse Problems Workshop, Lorentz Center, Leiden, Netherlands - Aug 28 to Sep 1, 2017
9. SIAM Workshop on Parameter Space Dimension Reduction, Pittsburgh, PA, USA - July 9 & 10, 2017
10. SIAM Annual Meeting, Pittsburgh, PA, USA - July 10 to 14, 2017 Slides Poster
11. NDNS+ Workshop, Twente, Netherlands - June 12 & 13, 2017
12. NDNS+ PhD Days 2017, Lunteren, Netherlands Slides
13. Utrecht SIAM Student Chapter talk, Utrecht, Netherlands Slides
14. INdAM MATHTECH Workshop on Biomedical Imaging 2017, Rome, Italy
15. Biweekly Tomomeeting, Computational Imaging Group, Centrum Wiskunde Informatica, Amsterdam, Netherlands Slides
16. SIGMA Conference, CIRM Marseille, France
17. SEG Annual Meeting 2016, Dallas, Texas Slides
18. Computational Sciences for Future Energy Conference 2016, Utrecht, Netherlands Slides
19. Forty-First Woudschoten Conference 2016, Zeist, Netherlands Poster
20. Conference on Multiscale Inverse Problem 2016, Loka Brunn, Sweden Slides
21. NDNS Workshop 2016, Enschede, Netherlands Poster
22. Mini-Symposium on Seismic Imaging 2016, Delft, Netherlands
23. SLIM Seismic Seminar 2016, Vancouver, Canada Slides
24. Fortieth Woudschoten Conference 2015, Zeist, Netherlands Poster
25. Summer School on Inverse Problems 2015, Munster, Germany

Upcoming Events and Conferences

1.

Here is a list of all the courses I have taken, both during graduate and undergraduate studies.