Internal multiple elimination

Internal multiple elimination: Can we trust an acoustic approximation?

Reinicke Urruticoechea, C. (TU Delft Applied Geophysics and Petrophysics; Aramco Overseas Company B.V.)
Dukalski, Marcin (Aramco Overseas Company B.V.)
Wapenaar, C.P.A. (TU Delft ImPhys/Medical Imaging; TU Delft Applied Geophysics and Petrophysics)

2021

Correct handling of strong elastic, internal, multiples remains a challenge for seismic imaging. Methods aimed at eliminating them are currently limited by monotonicity violations, a lack of a-priori knowledge about mode conversions, or unavailability of multi-component sources and receivers for not only particle velocities but also the traction vector. Most of these challenges vanish in acoustic media such that Marchenko-equation-based methods are able in theory to remove multiples exactly (within a certain wavenumber-frequency band). In practice, however, when applied to (elastic) field data, mode conversions are unaccounted for. Aiming to support a recently published marine field data study, we build a representative synthetic model. For this setting, we demonstrate that mode conversions can have a substantial impact on the recovered multiple-free reflection response. Nevertheless, the images are significantly improved by acoustic multiple elimination. Moreover, after migration the imprint of elastic effects is considerably weaker and unlikely to alter the seismic interpretation.

elastic
internal multiples
shallow
Middle East

http://resolver.tudelft.nl/uuid:b248a597-14e0-4531-953a-5b048c21e28b

https://doi.org/10.1190/geo2020-0850.1

0016-8033

Geophysics, 86 (5), WC41–WC54

Accepted Author Manuscript

Institutional Repository

journal article

© 2021 C. Reinicke Urruticoechea, Marcin Dukalski, C.P.A. Wapenaar