Characterizing a Wedged Chalk Prospect in the Danish Central Graben Using Direct Probabilistic Inversion

A novel direct probabilistic inversion using seismic pre-stack data as input to characterize a wedged chalk reservoir prospect was demonstrated from the Upper Cretaceous unit, Danish North Sea. The objective was to better resolve the lateral extent and pinch-out of the chalk prospect in a frontier e...

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Bibliographic Details
Published in:Geosciences (Basel) 2022-01, Vol.12 (5), p.194
Main Authors: Bredesen, Kenneth, Herbert, Ian, Smit, Florian, Jakobsen, Ask Frode, Frykman, Peter, Bruun, Anders
Format: Article
Language:English
Subjects:
Approximation
Bayesian inference problem
Chalk
Cretaceous
Danish Central Graben
Direct Seismic Inversion
Earth science
Geology
Graben
interpretation
Inverse problems
Inversions
Lithology
Methods
Physics
reservoir geophysics
Reservoirs
Seismic surveys
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Summary:A novel direct probabilistic inversion using seismic pre-stack data as input to characterize a wedged chalk reservoir prospect was demonstrated from the Upper Cretaceous unit, Danish North Sea. The objective was to better resolve the lateral extent and pinch-out of the chalk prospect in a frontier exploration setting and compare the results with a more traditional deterministic inversion and geostatistical reservoir modeling. The direct probabilistic inversion results provided additional reservoir insights that were challenging to obtain from the more traditional workflows and are also more flexible for associated uncertainty assessments. Hence, this study demonstrates the usefulness of such direct probabilistic inversions even with suboptimal data availability.
ISSN:2076-3263
2076-3263
DOI:10.3390/geosciences12050194