Combining the staggered grid technique with Fourier spectral approximations of the wave equation has recently been used for modelling of 2D elastic wave propagation [1]. The present scheme models propagation of acoustic waves in a 3D medium with arbitrary density and vetocity variations, using a staggered grid for the spatial discretization. The accuracy achieved by combining staggered grids with the Fourier spectral technique is demonstrated for two subsurface models: A model with a free surface and a plane interface, by comparison with solutions obtained by using Cagniard-de Hoop technique. A model containing a fault, see Figure 1 -2, by comparisons between models sampled with different numbers of grid points per shortest wave length.


Article metrics loading...

Loading full text...

Full text loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error