3-D recursive extrapolation operators: an overview
نویسنده
چکیده
with ∆z being a small extrapolation step. The advantage of computation in the kx, ky-ω domain is that the desired result is obtained by multiplication of the data with the operator. However, to allow laterally varying medium functions a space variant convolution operator in the x, y-ω (space-frequency) domain should be applied. When the spatial extrapolation operator is used in an explicit recursive depth migration algorithm it must be calculated in such a way that it gives reliable and stable results within a reasonable computation time. A first subdivision between different optimization methods can be made with respect to the type of expansion of the analytical phase shift operator (equation (1)) in the wavenumber domain. This expansion can be a Taylor series with respect to kz = √
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