Rapid shear wave velocity imaging with seismic landstreamers and surface wave inversion

Adam O’Neill; Jamhir Safani; Toshifumi Matsuoka

doi:10.1071/EG06292

ISSN: 0812-3985
E-ISSN: 1834-7533

Rapid shear wave velocity imaging with seismic landstreamers and surface wave inversion
Authors Adam O’Neill, Jamhir Safani and Toshifumi Matsuoka
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 37, Issue 4, Dec 2006, p. 292 - 306
DOI: https://doi.org/10.1071/EG06292
- Received: 25 Oct 2006
- Accepted: 18 Jul 2006
- Published online: 01 Dec 2006

Abstract

Surface wave data acquisition by landstreamer with flat baseplates produces nearly identical dispersion curves to those from planted geophones. Dependence on geophone frequency and good coupling is negligible and repeatability is lair. The primary application of landstreamers is to produce 2D shear wave velocity profiles through ID inversion of a number of dispersion curves at high shot density, and numerical modelling shows that this workflow provides accurate subsurface images. However, in the vicinity of a shallow, soft-layer termination, its lateral extent can be overestimated by about 10% of the recording spread length. Shorter spreads show less wavefield scattering hut more dependence on source-receiver geometry, and the response is dominated by the material under the nearer-offset channels.

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Article Type: Research Article

Keyword(s): shallow stiffness imaging; sort layer termination

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Rapid shear wave velocity imaging with seismic landstreamers and surface wave inversion

Abstract

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