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Non-linear Full Wavefield Inversion Applied to Carboniferous Reservoirs in the Wingate Gas Field (SNS, Offshore UK)Normal access

Authors: A. Gisolf, R. Huis in't Veld, P. Haffinger, C. Hanitzsch, P. Doulgeris and P.C.H. Veeken
Event name: 76th EAGE Conference and Exhibition 2014
Session: FWI - Near-surface and Elastic Application
Publication date: 16 June 2014
DOI: 10.3997/2214-4609.20141414
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 713.86Kb )
Price: € 20

A high resolution full wavefield inversion (FWI-res) has been conducted over sub-cubes from the Wingate 3D seismic survey. Three wells provide calibration to the prestack elastic inversion of a deep-seated Carboniferous reservoir section. The non-linear FWI-res technique uses higher order scattering (or multiple energy) to constrain the output. The inversion is performed on migrated seismic data, including a demigration step over the target interval. This object oriented approach is possible in the plane wave (Tau-p) domain, when assuming a layered medium immediately below the target location. The FWI-res inversion scheme requires only limited user input: cleaned-up Common Image Gathers, top horizon to demigrate the data and a velocity model. Data pre-conditioning is carried out by dip filtering in the time-space domain. This new trace-by-trace inversion is robust and satisfactory results are obtained even in poor data zones.

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