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Characterization of a carbonate reservoir using elastic full‐waveform inversion of vertical seismic profile data
Author(s) -
Takougang Eric M. Takam,
Ali Mohammed Y.,
Bouzidi Youcef,
Bouchaala Fateh,
Sultan Akmal A.,
Mohamed Aala I.
Publication year - 2020
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/1365-2478.12962
Subject(s) - geology , inversion (geology) , amplitude , vertical seismic profile , submarine pipeline , seismic inversion , economic geology , borehole , seismology , regional geology , reservoir modeling , waveform , mineralogy , azimuth , optics , geotechnical engineering , volcanism , tectonics , physics , quantum mechanics , voltage
Two‐dimensional elastic full waveform inversion was applied to two lines extracted from a spiral three‐dimensional vertical seismic profile data acquired in an oilfield offshore, Abu Dhabi, in the United Arab Emirates. The lines were selected to be parallel and perpendicular to the plane defined by the deviated borehole. The purpose of the inversion was to derive high‐resolution elastic properties of the subsurface. After pre‐processing, the data were band‐pass filtered with a minimum frequency of 3.5 Hz and a maximum frequency of 30 Hz. A sequential inversion approach was used to mitigate non‐linearity. The pre‐processing of the data consisted in the removal of bad traces, followed by amplitude and phase corrections. High‐resolution P‐ and S‐wave velocity models that show good correlations with the available sonic logs were obtained. The results of the inversion suggest that the oilfield consists of a stack of layers with varying lithology, porosity and possibly fluid content.