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[2019-03-16]


[2019-03-16]

Practical Aspects of Large-scale Sparsity-promoting Seismic Inversion

Check out this mini-symposium organized as part of the SIAM GS 2019 conference, and my contributed talk.


Practical Aspects of Large-scale Sparsity-promoting Seismic Inversion - Part I of II
Practical Aspects of Large-scale Sparsity-promoting Seismic Inversion - Part II of II
Challenges and Opportunities of Sparsity-promoting FWI


[2014-09-09]


[2014-09-09]

Model-difference regularization in joint 4DFWI

Check out my presentation at the joint SEG-AGU research workshop on Advances in Active+Passive Full Wavefield Imaging (22-24 July, 2014, Vancouver).


Joint 4DFWI with model-difference regularization


[2011-06-02]


[2011-06-02]

Efficient One-way Wave-equation Migration in Tilted Transvesally Isotropic Medium

Presented technique allows computationally efficient and accurate migration of seismic data in TTI media. Click on the thumbnail on the left to view the extended abstract of the paper presented at the 73rd Annual Conference of the European Association of Geophysicists and Engineers, held 23-26 May 2011 in Vienna....display full article text



[2010-08-06]


[2010-08-06]

Using DDS Data Formats in Octave/Matlab

Save the link on the left as a .pdf file for a short demonstration of how DDS dictionaries and binaries can be manipulated in Octave and Matlab. The Free Data Dictionary System (FreeDDS) is an open-source seismic data processing system developed by BP (see references in the document)



[2007-09-01]


[2007-09-01]

Localized image-difference wave-equation tomography

The geophysical inversion technique presented in this paper allows a reduction of the large-scale optimization problem arising in both image-difference wave equation tomography and wave-equation velocity analysis into a series of smaller optimization tasks than lend themselves to efficient solving using existing techniques such as limited-memory BFGS (LBFGS) quasi-Newton method, conjugate-gradients, etc.



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