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Full-waveform Seismic Inversion at Reservoir DepthsNormal access

Authors: T. Nangoo, M. Warner, J. Morgan, A. Umpleby, I. Stekl and A. Bertrand
Event name: 74th EAGE Conference and Exhibition incorporating EUROPEC 2012
Session: Full Waveform Inversion I
Publication date: 04 June 2012
DOI: 10.3997/2214-4609.20148716
Organisations: SPE, EAGE
Language: English
Info: Extended abstract, PDF ( 2.48Mb )
Price: € 20

We apply 3D anisotropic acoustic full-waveform tomographic seismic inversion to a North Sea wide-angle OBC dataset, and demonstrate that our recovered velocity model is realistic within the chalk reservoir sequence to depths of up to 4000 m. Because we use predominantly wide-angle refracted arrivals in the inversion, we are able to undershoot and image within the otherwise seismic obscured area beneath a shallow gas cloud that overlies the reservoir. Wide-angle FWI techniques using similar datasets have not previously been used to image successfully at these depths.

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