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NPD’s play models and undiscovered resources in the Barents Sea

NPD’s play models and undiscovered resources in the Barents Sea. Table of contents. Major structural elements Exploration history and the current situation in the Barents Sea Exploration results since 2006 NPD’s database Play models of the Barents sea Prognoses and resource estimates

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NPD’s play models and undiscovered resources in the Barents Sea

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  1. NPD’s play models and undiscovered resources in the Barents Sea

  2. Table of contents • Major structural elements • Exploration history and the current situation in the Barents Sea • Exploration results since 2006 • NPD’s database • Play models of the Barents sea • Prognoses and resource estimates • Summary

  3. Norwegian Continental Shelf Barents Sea

  4. The Barents Sea area Little known area Moderately known area Unknown area Well known area • The Barents Sea north of 74°30’ is characterized as little known area • The Barents Sea south of 74°30’, apart from the Hammerfest Basin, is characterized as moderately known area • The Hammerfest Basin is characterized as a well known area Area of overlapping claims (disputed area)

  5. History and current situation • Opened for exploration drilling in 1980 (5th concession round) • First well drilled in 1980 (7119/12-1) • First discovery Askeladd (7120/8-1) in 1981 • First commercial oil discovery was Goliat (7122/7-1) in 2000 • 81 exploration wells have so far been drilled in the Norwegian Barents Sea. • About half in the Hammerfest Basin • One field in production (Snøhvit) and one is under development (Goliat) • Currently 42 active production licenses.

  6. What has happened since the awards of the 19th concession round? 7122/7-3 Kobbe Goliat (Oil) 7122/7-4SKlappmys Goliat (Oil) 7125/4-1 Nucula (Oil & Gas) 7222/6-1SObesum (Oil) 7222/11-1Caurus (Gas) 7224/6-1 Arenaria (Gass) 7226/2-1 Ververis (25 gass) • 18 exploration wells drilled • 7 new discoveries • 5 successful appraisal wells • 6 dry wells • Almost 70 % discovery rate • Proven resources since 2006 • Oil approx. 20 M Sm3 • Gas approx 100 G Sm3 • Two play models are confirmed • APA 2007, APA 2008 & 20th concession round resulted in 18 new production licenses. 7120/6-2S (Snøhvit) 7122/6-2 (Tornerose) 7122/7-5A (West Goliat) 7125/4-2 (Nucula) 7223/5-1 (Obesum) 7120/8-4 (wildcat, Askeladd Beta) 7122/7-5 (wildcat, West Goliat structure) 7123/4-1S (appraisal, Snøhvit) 7123/4-1A (appraisal, Snøhvit) 7227/11-1S (wildcat, Uranus) 7227/11-1A (wildcat, Uranus)

  7. Database • Medium to goodseismiccoveragesouthof Bjørnøya • Goodwelldensity in the Hammerfest basin • Relativelylowdensity in thesurrounding areas • NPD’sprospect database consistsof over 1000 prospects, a fourthofthese in theBarentssea.

  8. Play models • 23 play models in total, 8 confirmed, 15 unconfirmed

  9. NPD’s play model definitions • A play is defined as a stratigraphically delimited area where a specific set of geological factors must be present so that petroleum may be provable in commercial quantities. • Undiscovered resources in a play include both mapped (prospects) and unmapped (leads and potential prospects) resources.

  10. Mature source rock Valid trap and seal Play Reservoir NPD’s play model definitions • Elements • Source Rock • Migration Route • Reservoir Rock • Trap • Seal Rock • Process • Generation • Migration • Accumulation • Preservation

  11. Distribution of Barents Sea play models Carboniferous & Permian

  12. Distribution of Barents Sea play models Carboniferous, Permian • Attractive elements • Carboniferous/Permian • Source rocks mainly coal, of Early Carboniferous age have been proven • Reservoir is proven in the western part of the Loppa High in well 7120/2-1 • Many plays not confirmed • Well 7120/2-1 penetrated  karstified limestone sequence with good oil shows • BPU-4: Model confirmed by discovery 7128/4-1 • Reservoir rock • Carboniferous • Sandstone & conglomerate • Permian • Karstifiedlimestone, limestone, dolomite, spiculites /chert and silicifiedlimestone • Source rock • Carboniferous • Late Devonian to EarlyCarboniferous (HoelbreenMemberEquivalent) and U. Carboniferous/Lower Permian shales • Permian • EarlyCarboniferous and Late Carboniferous/Early Permian shales • Depositional environment • Carboniferous • Fluvial and alluvial • Carboniferous/Permian • Syn- and post tectonic infill in active rift basins in a shallow marine setting, on tidal flats and in shallow evaporite basins • Permian • Marine, temperate to cold water • Trap • Carboniferous • Bothstructural and stratigraphic • Permian • Mainlystratigraphic • Criticalfactors: • Carboniferous • Non-preservation and leakage of hydrocarbons owing to tilting, reactivation of faults and Tertiary/Quaternary uplift and erosion • Presence of mature source rock • Permian • Non-preservation and leakage of hydrocarbons owing to tilting, reactivation of faults and Tertiary/Quaternary uplift and erosion • Presence and quality of reservoir Edgeøya Plattform Olga Basin Sentralbanken High Gardar- banken High Bjarmeland Plattform Barents Sea Margin Nordkapp Basin Loppa High Finnmark Plattform H B

  13. Distribution of Barents Sea play models Triassic

  14. Distribution of Barents Sea play modelsTriassic • Criticalfactors • The areas has been affected by Late Tertiary/Quaternary uplift and inversion, this could have trigged possible leakage of prospective hydrocarbon accumulations • Lateral extent and quality of reservoir rock • Group/Formation • BRL, RM-4 and 5: Sassendalen Group with the Havert-, Klappmyss- and Kobbe Formation • BRU-1 and 2: Kapp Toscana Group with the Snadd Formation • Reservoir rock • Sandstone • Attractive features • BRL, RM-4, BRU-1:  Confirmed by several gas and gas/oil discoveries • The discovery 7226/11-1 confirmed source rock of Upper Permian age  • The discovery 7228/7-1 A indicates source rock of Carnian age in the eastern Hammerfest Basin and in the Nordkapp Basin • Stratigraphic and structural traps are identified • BRL, RM-5: Source rock confirmed by exploration- and shallow wells penetrating the Klappmyss- and Kobbe Formation • BRU-1 and -2: Moderate to good reservoir quality • Along the Western Fault Margin and the Loppa High source rocks of Jurassic and Cretaceous age may be present • Depositional environment • Fluvial, deltaic, coastal plain and shallow marine • Source rock • UpperDevonian-LowerCarboniferousshales, • LowerCarboniferouscoals, • Upper Permian shales and UpperTriassic delta plainfacies • Trap • Stratigraphic, rotated fault blocks and halokinetic Edgeøya Plattform Olga Basin Gardar- banken High Sentralbanken High Bjarmeland Plattform Barents Sea Margin Loppa High Nordkapp Basin Finnmark Plattform H B

  15. Distribution of Barents Sea play models Lower – middle Jurassic

  16. Distribution of Barents Sea play modelsJurassic • Trap • Rotated fault blocks and horsts • BJL, JM-7 in the Nordkapp Basin: Stratigraphic traps related to salt diapers. Rotated fault blocks may also occur • Source rock • BJL, JM-5 and 6: Upper Jurassic shale (Hekkingen Formation). Older source rocks may be present for BJL, JM-6 • BJL JM-7: Mainly Early to Mid Triassic shale (Steinkobbe Formation) • Shales of Ladinian and Carnian age (in the Nordkapp basin: only Carnian) • Group/Formation • Kapp Toscana Group with the Tubåen-, Nordmela- and Stø Formations • Reservoir rock • Sandstone • Depositional environment • Fluvial, deltaic and shallow marine • Criticalfactors • Non-preservation and leakage of hydrocarbons owing to tilting, reactivation of faults and Tertiary/Quaternary uplift and erosion, especially for shallow and/or truncated structures. • The thickness of the Nordmela- and Stø Formation decreases towards northeast • Cap rock with sufficient sealing capacity • BJL, JM-7: Source rocks in the Steinkobbe Formation deposited only in the Fingerdjupet Sub Basin, Maud Basin and the western part of the Bjarmeland Platform • Attractive features • Tubåen- and Stø Formation have good reservoir quality, except in the deepest basins Tubåen Formation dominates towards the northeast • BJL, JM-5: Confirmed by the discoveries 7121/4-1 Snøhvit, 7120/8-1 Askeladd and 7120/9-1 Albatross, all included in the Snøhvit field, and the oil discovery 7122/7-1 Goliat • Efficient and mature source rocks proven in the Hammerfest Basin • Cap rocks with sealing capacity confirmed in the Nordkapp Basin Edgeøya Plattform Olga Basin Gardar- banken High Sentralbanken High Bjarmeland Plattform Barents Sea Margin Loppa High Nordkapp Basin Finnmark Plattform H B

  17. Distribution of Barents Sea play models Upper Jurassic – Lower Cretaceous

  18. Distribution of Barents Sea play modelsUpper Jurassic – Lower Cretaceous • Trap • Stratigraphic and occasionallystructural • Criticalfactors • Long-distance migration • The areas have been affected by Late Tertiary/Quaternary uplift which probably have affected the storage of originally accumulated petroleum in the Hammerfest Basin and the terraces of the Western Fault Margin • Group/Formation • Adventdalen Group with the Hekkingen-, Knurr- Kolje- and Kolmule Formations. • Reservoir rock • Sandstone • Source rock • Late Jurassic shale of the Hekkingen Formation • Depositional environment • Shallow and deep marine • Attractive features • Knurr and Kolje Formation: Good reservoir quality in most of the exploration area • In the northern part of the Hammerfest Basin significant volumes of sands are proven in deep marine fans • The wells 7120/1-2 and 7120/2-2 have been production tested and the tests indicate mobile hydrocarbons Edgeøya Plattform Olga Basin Gardar- banken High Sentralbanken High Bjarmeland Plattform Barents Sea Margin Loppa High Nordkapp Basin Finnmark Plattform H B

  19. Distribution of Barents Sea play models Paleogene

  20. Distribution of Barents Sea play modelsPaleogene • Group/Formation • Sotbakken Group with the Torsk Formation • Reservoir rock • Sandstone • Trap • Rotated fault blocks, domes- and horsts, stratigraphic and halokinetic • Attractive features • Reservoir is proven in wells 7316/5-1 and 7216/11-1S • Source rock of Early Aptian age may be present along the Western Fault Margin • Indication of Hauterivian source rock in well 7219/8-1 • Criticalfactors • Presence of reservoir • The area has been affected by late Tertiary/Quaternary tilting. • Depositional environment • Shallow and deep marine • Source rock • MainlyCreataceous

  21. Estimating undiscovered resources Play analysis, input • grouping of prospects • play maps • database • uncertainty Play analysis, output • recoverable resources • expected field sizes

  22. In place volumes – 2006 and 2009Reduced uncertainties and increased expectations

  23. In place vs. recoverable resources

  24. Changed recovery factor for liquids og gas Væske Gass

  25. Conclusions • 23 play models are defined in the Norwegian Barents Sea • Reservoir rocks from the early Carboniferous to the Oligocene are represented • Only eight are confirmed while 14 remains unconfirmed • The expected in place volumes are estimated to 2200 M Sm3 o.e. • The expected recovery volumes are estimated to 900 M Sm3 o.e. • Large volumes to be discovered

  26. Play models, you say? Lets play!

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