Numerical experiment oriented to partial validation of the structural model at Domenico lignite site is presented. The structure is 2D and contains several lignite seams at different depths and a low-velocity layer on the top of the model. The experiment consists in simulation of CDP section along one 625 m long segment of the measured profile at the site. The CDP stack was modelled by two independent calculation techniques, based on completely different concepts: the finite-difference method and the ray method. Due to incompletness of the ray synthetic wave field as well as numerical problems of finite-differences at higher frequencies, there is a very poor agreement between the seismogram sections obtained by the two methods for individual shot points. On the other hand, the CDP stacked sections modelled by the ray and finite-difference methods agree rather well. This is because the main differences between the wave fields computed by the two methods are due to the presence of the low-velocity layer (ground roll, multiple reflections, etc.). These parts of the wave field can be suppressed by a routine data processing like f-k filtration and CDP stack for a multi-shot experiment. This is also why the synthetic ray and finite-difference CDP stacks agree relatively well the observed data.
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