Estimation of the p-wave velocity profile of elastic real data based on surface wave inversion

Estimation of the p-wave velocity profile of elastic real data based on surface wave inversion

Ponomarenko, A.V.
Kashtan, B.M.
Troyan, V.N.
Mulder, W.A.

Civil Engineering and Geosciences

Geoscience & Engineering

2013-09-11

Recently, we proposed an analytical approach to invert for a smoothly varying near-surface P-wave velocity profile that has a squared slowness linearly decreasing with depth. The exact solution for such a velocity profile in the acoustic approximation can be expressed in terms of Airy functions and leads to a dispersion equation. The method was successfully applied to synthetic elastic data with small Vs/Vp-ratio. Here, we apply the method to land data. The result agrees with that of multi-layered inversion, confirming its potential to provide an initial P-wave velocity model for acoustic full waveform inversion. Compared to multi-layered inversion, the method is simpler to use and produces a smooth model characterized by three parameters. In some cases, having a smooth rather than a blocky initial model for full waveform inversion is more appropriate.

http://resolver.tudelft.nl/uuid:f869b091-a713-4c3c-84c7-4a7372db92c0

EAGE

19th European meeting of environmental and engineering geophysics, Near surface geoscience 2013, Bochum, Germany, 9-11 September 2013

Institutional Repository

conference paper

(c) The authors