npd’s play models and undiscovered resources in the barents sea
TRANSCRIPT
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
Summary
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Barents SeaNorwegian Continental Shelf
The Barents Sea 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
Little known area
Moderately known area
Well known area
Unknown area
Area of overlapping claims (disputed area)
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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.
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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.
What has happened since the awards of the 19th concession round?
7120/6-2S (Snøhvit)7122/6-2 (Tornerose)7122/7-5A (West Goliat)7125/4-2 (Nucula)7223/5-1 (Obesum)
7120/8-4 (wild cat, Askeladd Beta)7122/7-5 (wild cat, West Goliat structure)7123/4-1S (appraisal, Snøhvit)7123/4-1A (appraisal, Snøhvit)7227/11-1S (wild cat, Uranus)7227/11-1A (wild cat, Uranus)
Database
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Medium to good seismic coverage south of Bjørnøya
Good well density in the Hammerfest basin
Relatively low density in the surrounding areas
NPD’s prospect database consists of over 1000 prospects, a fourth of these in the Barents sea.
Play models
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Level Reservoir rock Confirmed play models
Unconfirmed play models Total
Paleogene to neogen Siliclastic 2 2
Upper Jurassic to lower Cretaceous
Siliclastic 1 1
Jurassic Siliclastic 3 3
Triassic Siliclastic 4 4
Upper Carboniferous to permian
Carbonates and some siliclastic 1 8 9
Devonian to lower carboniferous
Siliclastic and some carbonate 4 4
Total 8 15 23
23 play models in total, 8 confirmed, 15 unconfirmed
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.
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ElementsSource RockMigration RouteReservoir RockTrapSeal Rock
ProcessGenerationMigrationAccumulationPreservation
NPD’s play model definitions
Reservoir
Mature source rock
Valid trap and seal Play
Distribution of Barents Sea play models Carboniferous & Permian
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Play Age Area
BCL-3 Visean - Serpukhovian
Finnmark Platform
BCL-4Tournaisian-
Serpukhovian Loppa High
Play Age Area
BPM, PU-4Sakmarian- Artinskian/Kazanian
Finnmark Platform
BPM, PU-5 Ufimian/(Kungurian)-
Kazanian
Loppa High
BPU-4 Finnmark Platform
Play Age Area
BCU, PP-4 Serpukovian/Bashkirian -
Tatarian
C. and w. part of the
Finnmark Platform
BCU, PP-5 Loppa High
BCU, PL-3 Moscovian - Early
Sakmarian
Finnmark Platform
BCU, PL-4 Loppa High
Attractive elementsCarboniferous/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
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
Reservoir rockCarboniferous
Sandstone & conglomerate
Permian Karstified limestone, limestone,
dolomite, spiculites /chert and silicified limestone
TrapCarboniferous
Both structural and stratigraphic
Permian Mainly stratigraphic
Source rockCarboniferous
Late Devonian to Early Carboniferous (Hoelbreen Member Equivalent) and U. Carboniferous/Lower Permian shales
Permian Early Carboniferous and Late
Carboniferous/Early Permian shales
Critical factors: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
Distribution of Barents Sea play models Carboniferous, Permian
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Barents Sea Margin Loppa
HighNordkapp
Basin
H BFinnmark
Plattform
Gardar-banken High
Bjarmeland Plattform
Edgeøya Plattform
Sentralbanken High
Olga Basin
Distribution of Barents Sea play models Triassic
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Play Age Area
BRL, RM-4
Scythian -Anisian
Bjarmeland- and Finnmark Platform,
eastern Hammerfest Basin, Nordkapp Basin
BRL, RM-5Eastern part of the Loppa
High, Bjarmeland Platform, Mercurius
High, Maud Basin
BRU-1
Ladinian - Norian
Bjarmeland Platform, northeastern part of the
Finnmark Platform, eastern part of the Hammerfest Basin,
Nordkapp Basin
BRU-2
Bjørnøya Basin, Fingerdjupet Sub-basin,
Bjarmeland Platform, Maud Basin, Mercurius
High, Loppa High, Veslemøy High,
Bjørnøyrenna Fault Complex
Critical factors 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 Upper Devonian- Lower Carboniferous
shales, Lower Carboniferous coals,
Upper Permian shales and Upper Triassic delta plain facies
Trap Stratigraphic, rotated fault blocks and
halokinetic
Distribution of Barents Sea play modelsTriassic
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Barents Sea Margin Loppa
High Nordkapp
Basin
H BFinnmark Plattform
Gardar-banken High
Bjarmeland Plattform
Edgeøya Plattform
Olga Basin
Sentralbanken High
Distribution of Barents Sea play models Lower – middle Jurassic
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Play Age Area
BJL, JM-5 Rhaetian - Bajocian
Hammerfest Basin
BJL, JM-6
Hettangian - Bajocian
Bjørnøya Basin, Bjørnøyrenna Fault
Complex, Ringvassøy-Loppa Fault Complex,
Veslemøy High, Polhem Sub-Platform
BJL, JM-7
Eastern part of the Finnmark Platform,
Nordkapp Basin, Southern part of the Bjarmeland Platform,
Maud Basin, Fingerdjupet Sub
Basin
Distribution of Barents Sea play modelsJurassic
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Barents Sea Margin Loppa
High
H BFinnmark Plattform
Gardar-banken High
Bjarmeland Plattform
Edgeøya Plattform
Olga Basin
Sentralbanken High
Nordkapp
Basin
Depositional environment Fluvial, deltaic and shallow marine
Group/Formation Kapp Toscana Group with the Tubåen-,
Nordmela- and Stø Formations
Reservoir rock Sandstone
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)
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
Critical factors 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
Distribution of Barents Sea play models Upper Jurassic – Lower Cretaceous
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Play Age Area
BJU, KL-3 Kimmeridgian-Albian
Hammerfest Basin, terraces along Western Fault Margin
Trap Stratigraphic and occasionally structural
Critical factors 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
Depositional environment Shallow and deep marine
Group/Formation Adventdalen Group with the Hekkingen-,
Knurr- Kolje- and Kolmule Formations.
Reservoir rock Sandstone
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
Source rock Late Jurassic shale of the Hekkingen Formation
Distribution of Barents Sea play modelsUpper Jurassic – Lower Cretaceous
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Barents Sea Margin Loppa
High Nordkapp
Basin
H BFinnmark Plattform
Gardar-banken High
Olga Basin
Bjarmeland Plattform
Edgeøya Plattform
Sentralbanken High
Distribution of Barents Sea play models Paleogene
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Play Age Area
BTT-5 Late Paleocene-Oligocene
Hornsund Fault Complex, Vestbakken Vulcanic Province, Sørvestnaget Basin, Tromsø Basin, Harstad Basin, western part of the Bjørnøya Basin
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
Critical factors Presence of reservoir The area has been affected by late
Tertiary/Quaternary tilting.
Distribution of Barents Sea play modelsPaleogene
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Depositional environment Shallow and deep marine
Source rock Mainly Creataceous
Estimating undiscovered resources
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Play analysis, input
grouping of prospects play maps database uncertainty
Play analysis, output
recoverable resources expected field sizes
In place volumes – 2006 and 2009Reduced uncertainties and increased expectations
In place vs. recoverable resources
Changed recovery factor for liquids og gas
Væske Gass
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
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Play models, you say?
Lets play!