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The Importance of Low Frequency and Large Offset in Waveform InversionNormal access

Author: L. Sirgue
Event name: 68th EAGE Conference and Exhibition incorporating SPE EUROPEC 2006
Session: Low Frequency Wide Angle
Publication date: 12 June 2006
DOI: 10.3997/2214-4609.201402146
Organisations: SPE, EAGE
Language: English
Info: Extended abstract, PDF ( 1.41Mb )
Price: € 20

Proper reconstruction of the velocity field implies the recovery of a continuous range of wavenumbers from the low to the high end of the spatial spectrum. While the very low-wavenumber components of the model can be recovered by reflection tomography, waveform inversion has the potential to recover both intermediate and high wavenumber components of the model by using the full range of offsets and frequencies in the seismic data. However, this process is inherently difficult due to the non-linearity of the inverse problem. To mitigate this non-linearity, it is important to provide an appropriate starting velocity model, and seismic data with sufficient low frequencies and wide-angle wave propagation.

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