Surface wave inversion for a P-wave velocity profile via estimation of the squared slowness gradient

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

Research output

5 Citations (Scopus)

Abstract

Copyright © (2012) by the European Association of Geoscientists & Engineers All rights reserved. Surface waves can be used to obtain a near-surface shear wave profile. The inverse problem is usually solved for the locally 1-D problem of a set of homogeneous horizontal elastic layers. The output is a set of shear velocity values for each layer in the profile. P-wave velocity profile can be estimated if higher modes and P-guided waves are used in the inversion scheme. Here, we use an exact acoustic solution to invert for the P-velocity profile in an elastic model with a decreasing constant vertical gradient of the squared P-wave slowness, bounded by a free surface on the top and a homogeneous halfspace at the bottom. The exact acoustic solution can be expressed in Airy functions and leads to a dispersion equation. We can invert several modes of the dispersion equation for the single gradient parameter of the squared P-wave slowness from elastic data. As a first test case, we invert for the P-wave velocity profi
Original languageEnglish
Title of host publication75th European Association of Geoscientists and Engineers Conference and Exhibition 2013 Incorporating SPE EUROPEC 2013: Changing Frontiers
Pages3164-3168
Publication statusPublished - 2013

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