Characterization of a carbonate reservoir using elastic full‐waveform inversion of vertical seismic profile data

ABSTRACT 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 de...

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Bibliographic Details
Published in:Geophysical Prospecting 2020-07, Vol.68 (6), p.1944-1957
Main Authors: Takougang, Eric M. Takam, Ali, Mohammed Y., Bouzidi, Youcef, Bouchaala, Fateh, Sultan, Akmal A., Mohamed, Aala I.
Format: Article
Language:English
Subjects:
Boreholes
Carbonates
Corrections
Data
Data acquisition
Elastic properties
Full‐waveform inversion
Inversion
Linearity
Lithology
Offshore
Oil and gas fields
Oil field equipment
Oil fields
Porosity
Reservoir characterization
Resolution
S waves
Seismic analysis
Seismic profiles
Seismic surveys
Seismic velocities
VSP
Wave velocity
Waveforms
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Summary:ABSTRACT 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.
ISSN:0016-8025
1365-2478
DOI:10.1111/1365-2478.12962