Wave equation tomography using the unwrapped phase - Analysis of the traveltime sensitivity kernels

Ramzi Djebbi, Tariq Ali Alkhalifah

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Full waveform inversion suffers from the high non-linearity in the misfit function, which causes the convergence to a local minimum. In the other hand, traveltime tomography has a quasi-linear misfit function but yields low- resolution models. Wave equation tomography (WET) tries to improve on traveltime tomography, by better adhering to the requirements of our finite-frequency data. However, conventional (WET), based on the crosscorelaion lag, yields the popular hallow banana sensitivity kernel indicating that the measured wavefield at a point is insensitive to perturbations along the ray theoretical path at certain finite frequencies. Using the instantaneous traveltime, the sensitivity kernel reflects more the model-data dependency we grown accustom to in seismic inversion (even phase inversion). Demonstrations on synthetic and the Mamousi model support such assertions.
Original languageEnglish (US)
Title of host publicationLondon 2013, 75th eage conference en exhibition incorporating SPE Europec
PublisherEAGE Publications
ISBN (Print)9781629937915
DOIs
StatePublished - 2013

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