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Seismic uncertainty and ambiguity

Publikation: Bidrag til bog/antologi/rapportKonferencebidrag i proceedingsForskningfagfællebedømt

The link between seismic data and subsurface properties suffers from an intrinsic ambiguity, i.e., that many reservoir models fit the same data within the noise. In some pathological cases, this may cause biases in the interpretation of the structure of the earth models used in exploration and reservoir management. Inversion techniques for large seismic data sets encountered in the oil industry are well established and are assumed to be reliable. Although this is generally true, thanks to integrated knowledge from geology and other geophysical data, there is, in some cases, still a significant risk that traditional approaches may end up finding only part of the models which can explain the observed data, overlooking potentially different scenarios and, moreover, hampering a correct uncertainty quantification. This phenomenon is often observed in practice when different inversion contractors arrive at significantly different results from the same data sets. The impact of the unavoidable non-uniqueness should be assessed when performing inversion of seismic data. We investigate the magnitude of the ambiguity problem in seismic modelling of chalk reservoirs by explicitly taking ambiguity into account in the inverse problem. Our study is based on a careful selected test case from the the Danish North Sea sector.

OriginalsprogEngelsk
Titel79th EAGE Conference and Exhibition 2017 - Workshops
ForlagEuropean Association of Geoscientists and Engineers, EAGE
Publikationsdato1 jan. 2017
ISBN (Elektronisk)9789462822191
StatusUdgivet - 1 jan. 2017
Begivenhed79th EAGE Conference and Exhibition 2017 - Workshops - Paris, Frankrig
Varighed: 12 jun. 201715 jun. 2017

Konference

Konference79th EAGE Conference and Exhibition 2017 - Workshops
LandFrankrig
ByParis
Periode12/06/201715/06/2017
Navn79th EAGE Conference and Exhibition 2017 - Workshops

ID: 230793196