Marchenko wavefield redatuming, imaging conditions, and the effect of model errors

Sjoerd de Ridder, Andrew Curtis, Joost Van Der Neut, Cornelis Wapenaar
2016 SEG Technical Program Expanded Abstracts 2016   unpublished
Recently, a novel method to redatum the wavefield in the subsurface from a reflection response measured at the surface has gained interest for imaging primaries in the presence of strong internal multiples. A prerequisite for the algorithm is an accurate and correct estimate of the direct-wave Green's function. However, usually we use an estimate for the direct-wave Green's function computed in a background velocity medium. Here, we investigate the effect of amplitude and phase errors in that
more » ... se errors in that estimate. We formulate two novel imaging conditions based on double-focusing the measured reflection response inside the subsurface. These yield information on the amplitude error in the estimate for the direct-wave Green's function which we can then correct, but the phase error remains elusive.
doi:10.1190/segam2016-13777555.1 fatcat:kenpmbiyk5brrn6bdftrmreopq