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Title

How to deal with noisy and bandwidth limited data in Full Waveform Inversion: the appropiate choice of the misfit function

AuthorsJiménez-Tejero, C.E. ; Dagnino, D. ; Sallarès, Valentí ; Ranero, César R.
Issue Date13-Oct-2014
Citation16TH SEISMIX International Symposium on Multi-scale Seismic Imaging of the Earth's crust and Upper Mantle. Abstracts: 14 (2014)
AbstractRecent work on Full Waveform Inversion (FWI) has yielded an increasing number of objective functions as alternative to the traditional L2-norm. The main motivation of such works is to mitigate the effects of nonlinearity that are intrinsic to FWI by reducing the dependence of results on the initial model used and the lowest frequency that is present in field data. In this work, we perform a comparative study of five objective functions under a common 2D acoustic FWI scheme using synthetic seismic data. We compare results from L2-norm, phase, envelope, Non-Integration-Method (NIM), and Cross-Correlation Travel Time (CCTT) functions. We test the robustness of the functionals as a function of their performance with increasing starting frequency in the FWI.We also show the improvement of inversion results when the CCTT inversion result is used as initial model for any other function. Further we show the susceptibility of the different functionals to noise. Our results reveal that a promising strategy to invert noisy data with a limited low frequency content is a hybrid one combining CCTT and phase objective functions
Description16TH SEISMIX International Symposium on Multi-scale Seismic Imaging of the Earth's crust and Upper Mantle, 12-17 October 2014, Castelldefels, Barcelona.-- 1 page
Publisher version (URL)http://www.iplusdinnova.com/es/conference/16th-seismix-international-symposium
URIhttp://hdl.handle.net/10261/114689
Appears in Collections:(ICM) Comunicaciones congresos
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