Research Information System
Journal of Geophysics and Engineering, vol.6, no.2, pp.189-203, 2009 (SCI-Expanded)
The aim of true-amplitude imaging is to restore the amplitude information partially disappeared during different processing steps of the seismic data. In this paper, we try to develop a unified approach to the true-amplitude (TA) migration and partial migration (DMO) for two basic F-K and integral methods in 3D constant-offset data space. We, first, establish the connection between F-K and integral methods for TA migration in a 3D constant-offset medium. Secondly, we extend our analysis to unify the treatment of the TA migration and TA DMO within the same theoretical formulations for both F-K and integral approaches. Starting from the very general formulas obtained for F-K and integral methods in a 3D constant-offset environment, the amplitude preservation terms related to different acquisition configurations are derived as the special cases of the general formulation. Examples applied on synthetic and field data are given. Theoretical expectations are confirmed by the performance of the proposed method. © 2009 Nanjing Institute of Geophysical Prospecting.