Marchenko wavefield redatuming, imaging conditions, and the effect of model errors
| Autor: | de Ridder, Sjoerd, van der Neut, J.R., Curtis, A, Wapenaar, C.P.A., Sicking, Charles, Ferguson, John |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | De Ridder, S, Curtis, A, Van Der Neut, J & Wapenaar, C 2016, Marchenko wavefield redatuming, imaging conditions, and the effect of model errors . in SEG Technical Program Expanded Abstracts 2016 . SEG Technical Program Expanded Abstracts 2016, pp. 5155-5159 . DOI: 10.1190/segam2016-13777555.1 SEG Technical Program Expanded Abstracts 2016 |
| DOI: | 10.1190/segam2016-13777555.1 |
| Popis: | Recently, a novel method to redatum the wavefield in the sub-surface 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 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. |
| Databáze: | OpenAIRE |
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