Deconvolution and correlation-based interferometric redatuming by wavefield inversion

Deconvolution and correlation-based interferometric redatuming by wavefield inversion

Barrera Pacheco, D.F.
Schleicher, J.
van der Neut, J.R. (TU Delft ImPhys/Acoustical Wavefield Imaging; TU Delft Applied Geophysics and Petrophysics)
Wapenaar, C.P.A. (TU Delft ImPhys/Acoustical Wavefield Imaging; TU Delft Applied Geophysics and Petrophysics)

Mihai Popovici, A. (editor)
Fomel, S. (editor)

2017

Seismic interferometry is a method to retrieve Green’s functions for sources (or receivers) where there are only receivers (or sources, respectively). This can be done by correlationor deconvolution-based methods. In this work we present a
new approach to reposition the seismic array from the earth’s surface to an arbitrary datum at depth using the one-way reciprocity theorems of convolution and correlation type. The redatuming process is done in three steps: (a) retrieving the downward Green’s function for sources at the earth’s surface
and receivers at the datum, (b) retrieving the corresponding upward Green’s function, and (c) retrieving the reflected upward wavefield for sources and receivers at the datum. Input for steps (a) and (b) are the surface data and wavefields simulated in a velocity model of the datum overburden. Step (c)
uses the responses of steps (a) and (b) as input data in the convolution-based interferometric equation. The method accounts for inhomogeneities in the overburden medium, thus reducing anticausal events and artefacts as compared to a purely correlation-based procedure.

http://resolver.tudelft.nl/uuid:95b79ea8-bb03-41d3-8dea-96bdabc8bd41

https://doi.org/10.1190/segeab.36

SEG

Proceedings of the 87th SEG annual meeting, expanded abstracts

87th SEG annual meeting, 2017-09-24 → 2017-09-29, Houston, United States

SEG Technical Program Expanded Abstracts 2017, 1949-4645

Institutional Repository

conference paper

© 2017 D.F. Barrera Pacheco, J. Schleicher, J.R. van der Neut, C.P.A. Wapenaar