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