Common-angle migration and oriented waves in the Phase-Space (x, p) (original) (raw)

From the 3D phase-shift extrapolation of individual phase-space components, we derive for prestacked data a vector relation between kh, the horizontal offset wavenumber, and kz, the vertical one. While in 2D this relation depends only on the tangent of the scattering angle θ and not on the structural deep, in 3D, in general, this is no longer true. The resulting vector formula takes into account the orientation of the scattering plane containing the slowness vectors ps and pr, one describing the down-going wave and the other the up-going one.