Free Software

* 2D and 3D acoustic/visco-elastic finite difference wavefield modeling and 2D RTM,
* 2D and 3D Marchenko method and related tools,
* Multi-dimensional Deconvolution,
* Seismic Interferometry,
* One-way wavefield extrapolation, migration and tools,
* Tools for 2D gridded model building and wavelet definition,
* Basic processing tools

git clone https://gitlab.com/geophysicsdelft/OpenSource.git

2D Pre-Stack Depth Migration

2008: Parallel (MPI) 2D pre-stack depth migration +
2D wavefield extrapolation +
2D Greens function calculation.
All programs make use of WLSQ optimised one-way wavefield extrapolation operators.

GitHub

2D convolution for 3D wavefield extrapolation

2005: 2D convolution routine

GitHub

Changes:

July 2019: large rewrite of Marchenko programs and tools and additional program for RTM
2018: added Marchenko programs and tools
February 2016: PML for acoustic scheme, better receivers definition and bugfixes
February 2015: bugfixes and added small extra options
October 2014: added decompostion in up-down going wavefields
February 2013: better absorbing/tapered boundaries
June 2012: ampltiudes of source compliant with analytical expressions
January 2012: OpenMP added

If you use the Finite Difference in your research please refer to our paper:

"Finite-difference modeling experiments for seismic interferometry" Jan Thorbecke and Deyan Draganov, Geophysics, Vol. 76, no 6 (November-December); p. H1--H18.

If you use the Marchenko code in your research please refer to our paper:

"Implementation of the Marchenko method" Jan Thorbecke, Evert Slob, Joost van der Neut, Joeri Brackenhoff, and Kees Wapenaar, Geophysics, Vol. 82, no 6 (November-December); p. WB29-WB45.

If you find any bugs during compilation of the code, or running demo scripts; please e-mail them to me, so I can update the code. Feedback is also highly appreciated and suggestions for improvements, or adding extra functionality are welcome.

The produced data includes segy headers for each trace (in SU style: without ebcdic and binary header and in local IEEE format (no XDR)). Parameter input for the programs is based on Seismic Unix (SU) syle, every program contains a selfdoc, and the programs can be used in a SU environment. The programs are completely self-supporting and no additional packages or libraries have to be installed.

The software which can be downloaded from this web site is free software: you can redistribute it and/or modify it under the terms of the Common Public License.

THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS COMMON PUBLIC LICENSE ("AGREEMENT"). ANY USE, REPRODUCTION OR DIST RIBUTION OF THE PROGRAM CONSTITUTES RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.

A copy of this license can be found in the file 'Common_Public_License.txt' in the root directory of the code and http://www.opensource.org/licenses/cpl1.0.php.

Some routines used in the code are from Seismic Unix and include the SU LEGAL_STATEMENT in the source code. The software on this web site is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose.

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Jan Thorbecke
Page last modified: February 2016