Free-surface and internal multiple elimination in one step without adaptive subtraction

Free-surface and internal multiple elimination in one step without adaptive subtraction

Zhang, L. (TU Delft Applied Geophysics and Petrophysics)
Slob, E.C. (TU Delft Applied Geophysics and Petrophysics)

2019-01-01

We have derived a scheme for retrieving the primary reflections from the acoustic surface-reflection response by eliminating the free-surface and internal multiple reflections in one step. This scheme does not require model information and adaptive subtraction. It consists only of the reflection response as a correlation and convolution operator that acts on an intermediate wavefield from which we compute and capture the primary reflections. For each time instant, we keep one value for each source-receiver pair and store it in the new data set. The resulting data set contains only primary reflections, and from this data set, a better velocity model can be built than from the original data set. A conventional migration scheme can then be used to compute an artifact-free image of the medium. We evaluated the success of the method with a 2D numerical example. The method can have a wide range of applications in 3D strongly scattering media that are accessible from one side only.

Acoustic
Multiples

http://resolver.tudelft.nl/uuid:c7d257f8-5440-4322-8ac0-966891383a35

https://doi.org/10.1190/geo2018-0548.1

2019-06-03

0016-8033

Geophysics, 84 (1), A7-A11

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2019 L. Zhang, E.C. Slob