3D EAGE/SEG Overthrust model

Original model

Acoustic onshore model.

V_mn, V_max = 2178.83447 6000.00000 m/s

• Downlad the original 3D grid [Vp] here

n1=187 n2=801 n3=801 d1=d2=d3=25m

• Download our favorite 2D section (i3=455) here

n1=187 n2=801 d1=d2=25m

psimage.sh

• Download the 3D grid resampled with a grid interval of 50m here

n1= 94 n2=401 n3=401 d1=d2=d3=50m

Velocity grid used for benchmarking the wavelength-adaptive 27-point stencil.

References: H. Aghamiry, A. Gholami, L. Combe and S. Operto, Accurate 3D frequency-domain seismic wave modeling with the wavelength-adaptive 27-point finite-difference stencil: a tool for full waveform inversion, Geophysics, to appear.

The size of the grid is 93 x 401 x 401 for a grid interval of 50 m (57 Mb). Compared to the original model one sample out of two has been kept.

The FDFD solution is verified against the solution computed with the Convergent Series Method (CBS) .

Reference:

@article{Osnabrugge_2016_CBS,
title={A convergent Born series for solving the inhomogeneous Helmholtz equation in arbitrarily large media},
author={Osnabrugge, Gerwin and Leedumrongwatthanakun, Saroch and Vellekoop, Ivo M},
journal={Journal of computational physics},
volume={322},
pages={113--124},
year={2016},
publisher={Elsevier}
}

The velocity grid and the CBS wavefield (real and imaginary parts of the monochromatic wavefield) in raw binary format can be downloaded below to test the 27-point stencil in the FDFDMATRIX package available in the OpenCodes menu.

Download the velocity grid here (.BIN)

CBS solution (real and imaginary parts) here Real part (.bin) Imaginary part (.bin)

Reference:

@Book{Aminzadeh_1997_DSO,
title = {{3-D} {Salt} and {Overthrust} models},
publisher = {{SEG/EAGE} 3-{D} {M}odeling {S}eries {N}o.1},
year = {1997},
author = {F. Aminzadeh and J. Brac and T. Kunz},
serie = {{SEG/EAGE {3-D} Modeling Series No.1}},
}