Hydrocarbon Prospectivity of the Barents Sea

A detailed regional overview of the Barents Sea that takes an integrated approach to understanding and predicting the Hydrocarbon Potential. Using interpretation derived from combined Geophysical, Geological, Petrophysical and Source Rock analyses, Basin Models were created that allow G&G teams to:

• Effectively predict reservoir quality and thickness at both present day and maximum burial for input into volumetric calculations• Accurately predict maturity at a range of intervals and on a regional basis• Apply risking on source and reservoir in a regionally consistent manner• Rank areas in 22nd Round and guide future strategy

Regional Geophysical Interpretation

Approximately 120,000 km of seismic has been interpreted to produce TWT and depth maps of 16 horizons plus an Excel spreadsheet of well velocity T/D functions for all layers.

• Seabed• Base Quaternary• Top Eocene• Top Palaeocene• Base Tertiary• Top Knurr• Top Hekkingen• Top Jurassic Sand• Top Triassic• Top Snadd• Top Kobbe• Top Klappmyss• Top Havert• Top Permian• Top Salt• Top Basement

Regional Petrophysical Interpretation

Full CPI analysis has been carried out for 63 released wells in the Barents Sea including:

• Temperature \ Pressure plots• Porosity \ Permeabliity determination• Water Saturation• Reservoir Determination• Pay Determination• Reservoir Parameters

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Hydrocarbon Prospectivity of the Barents Sea

For more information, please contact TGS at:Tel: +44 0 208 339 4200Email: gps-sales@tgs.com

Regional Geological Interpretation

Reservoir distribution and reservoir quality maps, both from well data and conditioned by seismic data, have been produced for 10 regional reservoir intervals. Using these well and seismic constrained maps reservoir quality and thickness estimates may be predicted at present day and maximum burial for use as input into volumetric calculations.

• Tertiary • Tubåen Fm • Klappmyss Fm• Knurr Fm • Fruholmen Fm • Havert Fm• Stø Fm • Snadd Fm • Nordmela Fm • Kobbe Fm

Source rock analysis has identified the potential source rocks in the region. The source rock properties (TOC, HI, richness) have subsequently been mapped out for the following:

• Torsk Fm• Kolje FM• Hekkingen Fm• Lower Jurassic• Permo-Carboniferous

Basin modelling has been carried out for 30 wells and at a number of pseudo well locations. This has resulted in the identification of the timing and magnitude of the major uplift episodes in the basin’s geohistory at each of these locations.

This information has then been used as control points in the construction of an uplift \ erosion map for the entire region.

By combining the uplift map with the knowledge of the source rock intervals and the depth converted seimic horizons, maturity can be modelled on a regional basis

Regional maturity maps have been made this way for the following levels:

• Base Tertiary • Base Snadd• Top Hekkingen • Top Havert• Top Triassic • Top Permian• Top Snadd

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