BOUNDARY CONDITIONS AND THE SOURCE TERM FOR ONE-WAY ACOUSTIC DEPTH EXTRAPOLATION

摘要

The one-way acoustic wave equations can be derived, using eigenvalue decomposition of the two-way wave equation in the Fourier domain, in such a manner that the source term and the free-surface boundary condition are explicitly introduced. The proposed form of the one-way wave equations is well adapted to seismic reflection modeling because it allows a pressure field recorded at the surface to be extrapolated directly in depth. A numerical example illustrates the appropriate implementation of the source term and the free-surface boundary conditions. A comparison with a two-way modeling shows a good agreement of the computed wavefields. [References: 12]