--> Abstract: 3-D Seismic Facies Mapping and Well Data in 2-D Seismic Forward Modelling of Late Paleozoic Carbonate Deposits, Finnmark Platform, Southwestern Barents Sea, by B. Rafaelsen, L. Stemmerik, S. Agerlin Peteresen, and K. Andreassen; #90096 (2009)
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3-D Previous HitSeismicNext Hit Facies Mapping and Well Previous HitDataNext Hit in 2-D Previous HitSeismicNext Hit Previous HitForwardNext Hit Modelling of Late Paleozoic Carbonate Deposits, Finnmark Platform, Southwestern Barents Sea

Bjarne Rafaelsen1, Lars Stemmerik2, Steen Agerlin Peteresen3, and Karin Andreassen4
1Exploration Northern Areas, StatoilHydro ASA, Harstad, Norway.
2Section of Geography, University of Copenhagen, Copenhagen, Denmark.
3Research Centre, StatoilHydro ASA, Bergen, Norway.
4Department of Geology, University of Tromsø, Tromsø, Norway.

Upper Paleozoic carbonate buildups have been penetrated by well 7229/11-1 on the Finnmark Platform, southwestern Barents Sea. The well is situated close to the centre of a 3D Previous HitseismicNext Hit survey and therefore provides the opportunity to perform well-calibrated Previous HitseismicNext Hit facies mapping of the carbonate succession. Using this as a basis, 2D Previous HitforwardNext Hit Previous HitseismicNext Hit modelling of carbonate buildups has been performed.

This study aimed to better understand the Previous HitseismicNext Hit response of the carbonate succession, the buildups and discontinuities observed in the 3D Previous HitseismicNext Hit Previous HitdataNext Hit. Rock properties from well 7229/11-1 were supplemented by information from nearby wells to account for more basinal deposits. The use of Previous HitseismicNext Hit Previous HitforwardNext Hit Compound Modelling software, developed by StatoilHydro Research Centre, Bergen, has helped to make more realistic models and thus to better realize the Previous HitseismicNext Hit response of the succession. The software takes the step from simple ray tracing to fast convolution based synthetic Previous HitseismicNext Hit and integrates subsurface petrophysical properties (velocity and density) with interpreted lithology distribution and architecture.

No faults or discontinuities were introduced to the model, just a detailed facies distribution. The Previous HitmodelingNext Hit confirms results from the 3D Previous HitseismicNext Hit facies mapping and portrays the buildups in a similar manner as in the original Previous HitseismicNext Hit Previous HitdataNext Hit. Interestingly, discontinuities occurring in the modelling results within and just below the carbonate build-ups are interpreted as artefacts due to velocity contrasts. Therefore, when interpreting the 3D Previous HitseismicNext Hit Previous HitdataTop set, only the discontinuities that show horizon offsets beyond the lateral dimensions of the overlying carbonate buildups / abrupt changes in the evaporite deposits can be regarded as real faults.

 

AAPG Search and Discover Article #90096©2009 AAPG 3-P Arctic Conference and Exhibition, Moscow, Russia