HR: 1340h
AN: S33A-1082    [Abstracts]
TI: Inverse Multiple Scattering
AU: * Malcolm, A E
EM: amalcolm@dix.mines.edu
AF: Center for Wave Phenomena, Department of Geophysics, Colorado School of Mines 1500 Illinois st, Golden, CO 80401 United States
AU: de Hoop, M V
EM: mdehoop@dix.mines.edu
AF: Center for Wave Phenomena Department of Mathematics and Computer Science, Colorado School of Mines 1500 Illinois st, Golden, CO 80401 United States
AB: In reflection seismology at both the exploration and global scale, a common assumption is that waves recorded at the surface have scattered only once in the subsurface (primaries). We have developed a theory, through the combination of the Lipmann-Schwinger and Bremmer series,that goes beyond this assumption to allow for multiple reflections in the subsurface (internal multiples). Using this theory we construct two sets of common image gathers (CIGs), one containing information from both primaries and multiples and another that contains information only from multiples. The two sets of CIGs can then be differenced to remove contributions to a subsurface image from multiples, or each set of CIGs can be examined separately. Since internal multiples have traveled a larger distance in the subsurface they are more sensitive to the velocity model and the position of reflectors than primaries. I will describe the theory and give synthetic data examples of its application.
DE: 7260 Theory and modeling
DE: 3299 General or miscellaneous
DE: 0902 Computational methods, seismic
DE: 0935 Seismic methods (3025)
SC: Seismology [S]
MN: 2004 AGU Fall Meeting