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Transcript of HYDROCARBON EXPLORATION OPPORTUNITIES IN THE 21ST CENTURY, UNITED KINGDOM J R V Brooks 1, S Stoker 2...
![Page 1: HYDROCARBON EXPLORATION OPPORTUNITIES IN THE 21ST CENTURY, UNITED KINGDOM J R V Brooks 1, S Stoker 2 & T D J Cameron 2 1 Department of Trade and Industry,](https://reader035.fdocuments.net/reader035/viewer/2022070307/551ac26755034606048b4a75/html5/thumbnails/1.jpg)
HYDROCARBON EXPLORATION OPPORTUNITIES IN THE 21ST CENTURY, UNITED KINGDOM
J R V Brooks1, S Stoker2
& T D J Cameron2
1 Department of Trade and Industry, UK
2 British Geological Survey
BritishGeologicalSurvey
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1998
1983
1995
1990
1985
1980
1978
0
4 0
3 0
2 0
1 0
5 0
Cumulative production
Remaining recoverable reserves
Minimum estimated undiscovered recoverable reserves
Maximum estimated undiscovered recoverable reservesB
illio
n (
10 )
bar
rels
oil
equ
ival
ent
9
TO
TA
L O
IL, G
AS
AN
D C
ON
DE
NS
AT
E
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62.7 BBOECUMULATIVEPRODUCTION
REMAININGRECOVERABLERESERVES
MAXIMUM UNDISCOVEREDRECOVERABLERESERVES
82.3 BBOE
1983
1998
UK ULTIMATE RECOVERABLE RESERVES
28.57.5
26.6
30.1 26.3
25.9
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Scotland
IrelandIRISH SEA
NORTH SEA
England
Shetland
FaroeIslands
0-2 km
Licensed blocks
>2 km
Water depth
Continent-O
cean
Boundary
Rockall Tro
ugh
ATLANTIC MARGIN
Oil Field
Condensate Field
Gas Field
Gas Field
California
500 km
UK
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• UK is self-sufficient in oil and gas
• 204 offshore and 35 onshore fields currently
producing :- 136 oil, 87 gas and 16 condensate
• Producing reservoirs: Pre-Devonian basement
to Eocene
• Successful discretionary award scheme
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Scotland
IrelandIRISH SEA
NORTH SEA
England
Shetland
FaroeIslands
0-2 km
Paleohigh
>2 km
Water depth
Continent-O
cean
Boundary
Oil Field
Condensate Field
Gas Field
Rockall Tro
ugh
ATLANTIC MARGIN
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UK PETROLEUM PROVINCES
• NORTH SEA OIL PROVINCE
• NORTH SEA GAS PROVINCE
• ONSHORE & IRISH SEA BASINS
• ATLANTIC MARGIN
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IrelandIRISH SEA
NORTH SEA
England
Shetland
FaroeIslands
0-2 km
Licensed blocks
>2 km
Water depth
Oil Field
Condensate Field
Gas Field
Continent-O
cean
Boundary
Rockall Tro
ugh
ATLANTIC MARGIN
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NORTH SEAOIL PROVINCE
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AGE MORAY FIRTH CENTRAL GRABEN VIKING GRABEN
Sandstone
Sandstoneand coal
Mudstone
Carbonate
Evaporite
Volcanics
Fracturedbasem ent
Producingreservoir
Sourcerock
NEOGENE
PALEOGENE
CRETACEOUS
JURASSIC
TRIASSIC
PERMIAN
CARBONIF-EROUS
DEVONIAN
PRE-DEVONIAN
PO
ST-
RIF
TS
YN
-R
IFT
PR
E-R
IFT
?
ESTABLISHED PETROLEUM PLAYS, NORTH SEA OIL PROVINCE
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EASTSHETLANDPLATFORM
SCOTLAND
100 km 100 km
SCOTLAND
Mature Upper Jurassic source rocks
Post-rift
FIELDS ANDDISCOVERIES
NORTH SEAOIL PROVINCE
REGIONALSTRUCTURE
Syn-rift
Pre-rift
VIKINGGRABEN
VIK
ING
GR
AB
EN
MORAYFIRTH MORAY FIRTH
CE
NT
RA
L
GR
AB
EN
CEN
TRA
L
GR
AB
EN
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Neogene to Quaternary
Eocene to Oligocene Upper JurassicPaleocene
Upper Cretaceous
Lower Cretaceous
Po
st-r
ift
Sy
n-r
ift
M iddle Jurassic
Triassic (fluvial facies)
Triassic (floodplain facies)
Perm ian (evaporites, carbonates)
Perm ian (aeolian, fluvial facies)
Ordovician to Carboniferous
Pre
-rif
t
Proven play
Potential play
W SW ENE0
West Central Graben East Central Graben
1
2
3
4
5
6
7
8
De
pth
(km
)
10 km
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NORTH SEA OIL PROVINCE
Pre-rift: Devonian to Middle Jurassic -
Carboniferous in Central Graben underexplored
Syn-rift: Upper Jurassic to Lower Cretaceous -
35% - 40% of undiscovered reserves
Post-rift: Upper Cretaceous to Eocene - Paleogene
heavy oil reserves underexplored
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0
500
1000
1500
2000
2500
3000
3500
1974
1980
1990
1999
Cu
mu
lati
ve v
olu
me
(mm
bo
e)
Year of discovery
M & U Jurassic, Central North Sea
Courtesy Asset Geoscience Ltd
L Cretaceous, Moray Firth
SELECTED CREAMING CURVES, NORTH SEA OIL PROVINCE
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EASTSHETLANDPLATFORM
SCOTLAND
100 km 100 km
SCOTLAND
Mature Upper Jurassic source rocks
Post-rift
FIELDS ANDDISCOVERIES
NORTH SEAOIL PROVINCE
REGIONALSTRUCTURE
Syn-rift
Pre-rift
VIKINGGRABEN
VIK
ING
GR
AB
EN
MORAYFIRTH MORAY FIRTH
CE
NT
RA
L
GR
AB
EN
CEN
TRA
L
GR
AB
EN
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Scotland
IrelandIRISH SEA
NORTH SEA
England
Shetland
FaroeIslands
0-2 km
Licensed blocks
>2 km
Water depth
Oil Field
Condensate Field
Gas Field
Continent-O
cean
Boundary
Rockall Tro
ugh
ATLANTIC MARGIN
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NORTH SEAGAS PROVINCE
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MID NORTH SEA HIGH
ENGLAND
SOUTHERNNORTH
SEA BASIN
100 km
Triassic reservoir
L Perm ian play
Carboniferous play
Permian reservoirCarboniferous reservoir
PETROLEUM PLAY DISTRIBUTION, NORTH SEA GAS PROVINCE
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NORTH SEA GAS PROVINCE
Lower Permian discoveries still being made. The
NW Europe fairway has ultimately recoverable
reserves of 159 tcf
Seven Carboniferous fields contribute 5% of UK
gas production - fairway is in early stage of
exploration
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Dep
th (
km)
bel
ow
sea
leve
l
M id NorthSea HighSouthern North Sea Basin
50 km
Murdoch Ridge
Base Permian unconformity2
4
6
Alluvial/coal m easure facies
Deltaic facies
Basinal facies
Shallow marine/deltaic facies
Braided fluvial facies
Alluvial red bed facies
Lacustrine/coal m easure facies
Marginal marine facies
Upper Permian to Mesozoic
Westphalian (Pennsylvanian)
Late Permian (m udstone)
Namurian (Miss.-Penns.)
Late Permian (aeolian sandstone)
Proven play Potential play
Dinantian (Mississippian)
Devonian
NS
Dev
D
D?D
NN
WW
WN
D
Dev
CARBONIFEROUS PLAYS, NORTH SEA GAS PROVINCE
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CARBONIFEROUS PLAYS
Majority of discoveries have been made in
simple structural traps
Recent successes in combined structural /
stratigraphic plays, e.g. hanging wall
traps
Stratigraphic and deeper traps unexplored
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Scotland
IrelandIRISH SEA
NORTH SEA
England
Shetland
FaroeIslands
0-2 km
Licensed blocks
>2 km
Water depth
Oil Field
Condensate Field
Gas Field
Continent-O
cean
Boundary
Rockall Tro
ugh
ATLANTIC MARGIN
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UK ONSHOREAND IRISH SEA
BASINS
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Southern NorthSea Basin
London-Brabant
High
MidlandsEast
East IrishSeaBasin
CheshireBasin
WessexBasin
WealdBasin
IRISH SEA
ENGLAND
WytchFarm
100 km
Permian-Mesozoic basin
High
Licensed blocks
Gas Field
Significant recentgas discovery
Oil Field
Significant recentoil discovery
MidlandsMicrocraton
Paleozoic prospects
X
UK ONSHORE AND IRISH SEA PETROLEUM PROVINCES
Caernarfo
n
Bay Basin
Basin
Cardig
an Bay
UK
FRANCE
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PETROLEUM PLAYS, CAERNARFON BAY BASIN, IRISH SEA
De
pth
(k
m)
Quaternary
Paleogene
Triassic mudstone/evaporite
Triassic sandstone
Upper Permian
Lower Permian sandstone
Lower Permian conglomerate
Carboniferous
Precambrian to Lower Paleozoic
Metamorphosed basementHas no reservoir or source potential
Caernarfon Bay Basin
R
R
S
S
R
R
S
Reservoir unit
Regional seal
Source rock unit
Potential plays
10 km
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Scotland
IrelandIRISH SEA
NORTH SEA
England
Shetland
FaroeIslands
0-2 km
Licensed blocks
>2 km
Water depth
Oil Field
Condensate Field
Gas Field
Continent-O
cean
Boundary
Rockall T
rough
ATLANTIC MARGIN
![Page 27: HYDROCARBON EXPLORATION OPPORTUNITIES IN THE 21ST CENTURY, UNITED KINGDOM J R V Brooks 1, S Stoker 2 & T D J Cameron 2 1 Department of Trade and Industry,](https://reader035.fdocuments.net/reader035/viewer/2022070307/551ac26755034606048b4a75/html5/thumbnails/27.jpg)
ATLANTIC MARGIN
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RockallTrough
RockallBank
HattonBasin
Scotland
Shetland
FaroeIslands
Igneous centre
Oil field
Licensed acreageSouth and eastlim its of basalt Newly designated
acreage
0-2 km
>2 km
Water depth
250 km
UK ATLANTIC MARGIN
Continent-O
cean
boundary
Hatton B
ank
Wyville-
Thomson
Transfer FSB
FSB Faroe-Shetland Basin
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Scotland
IrelandIRISH SEA
NORTH SEA
England
Shetland
FaroeIslands
0-2 km
Licensed blocks
>2 km
Water depth
Oil Field
Condensate Field
Gas Field
Continent-O
cean
Boundary
Rockall Tro
ugh
ATLANTIC MARGIN
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Jurassic
Basin-floor sandstone
Lower Cretaceous
UKFaroesNW Schiehallion/
Foinaven playVictory
playClair play
SE
50 km
? ?
Paleocene
Upper Cretaceous
Lower Eocene to Recent
Upper Paleocene to Lower Eocene
Paleogene basalt
0
2
4
6
8
10
Dep
th (
km)
Permian to Triassic
Pre-Permian undifferentiated
Proven play
Potential play
PETROLEUM PLAYS IN THE FAROE-SHETLAND BASIN
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ShetlandIslands
FaroeIslands
Minimum extent of Jurassic source rocks
Newly designatedacreage
Mid-Eocene fan complexwith channel axes
Fan sediment entry points
Thick Paleogenebasalt
100 km
Igneous centre
High
Line of section
MID-EOCENE FAN COMPLEX, FAROE-SHETLAND BASIN
Mioceneinversion axisRon
a Rid
ge
FSB
FAROES
UK
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0
1
2
3
4
5
6
7
8
Dep
th (
km)
Potential play
Paleocene
Cretaceous
Jurassic and older
Basin-floor sandstoneM Eocene to Recent
U Paleocene to L Eocene
Faroe-Shetland BasinMiocene inversion
axis NESW
20 km
PETROLEUM PLAYS IN THE FAROE-SHETLAND BASIN
NEWLY DESIGNATED AREA
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Igneous centre
ShetlandIslands
FaroeIslands
High
Line of section
Minimum extent of Jurassic source rocks
Newly designatedacreage
Mid-Eocene fan complexwith channel axes
Fan sediment entry points
Thick Paleogenebasalt
100 km
FAROE-SHETLAND BASIN
Mioceneinversion axisRon
a Rid
ge
FSB
FAROES
UK
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00
2
4
6
Dep
th (
km)
De
pth
(km
)
Rockall Trough
W E
Middle Eocene to Recent
Lower Eocene
Mid Cretaceous
Precambrian to Lower Cretaceous (to Barremian)
Basin-floor sandstone
Shallow-marine sandstone
Paleogene volcanics/sills
Paleocene
Upper Cretaceous (post-rift)
Post-rift Syn-rift
Pre-rift
2
4
6
Potential play
10 km
Gapin
sectionapprox.150 km
PETROLEUM PLAYS IN THE ROCKALL TROUGH
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RockallTrough
RockallBank
HattonBasin
Scotland
Shetland
FaroeIslands
Igneous centre
Line of sectionOil field
Licensed acreageSouth and eastlim its of basalt Newly designated
acreage0-2 km
>2 km
Water depth
250 km
UK ATLANTIC MARGIN
Continent-O
cean
boundary
Hatton B
ank
Wyville-
Thomson
Transfer FSB
FSB Faroe-Shetland Basin
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6
4
2
0
Two
-way
tim
e (s
eco
nd
s)
Dykes
NW Hatton Basin Rockall Bank SE
50 km
Late Eocene to Recent
Lower to Middle Eocene Basin-floor sandstone
Potential play
Shallow-marine sandstone
Lower Eocene
Paleogene volcanics/volcaniclastic sediments
Permian to Cretaceous (conjectural)
Tilted fault blocks
proved in Irish
sector
Sub-Paleocene structure beneath Hatton Basin is conjectural
PETROLEUM PLAYS IN THE HATTON BASIN
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RockallTrough
RockallBank
HattonBasin
Scotland
Shetland
FaroeIslands
Igneous centre
Line of sectionOil field
Licensed acreageSouth and eastlim its of basalt Newly designated
acreage0-2 km
>2 km
Water depth
250 km
UK ATLANTIC MARGIN
Continent-O
cean
boundary
Hatton B
ank
Wyville-
Thomson
Transfer FSB
FSB Faroe-Shetland Basin
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1998
1983
1995
1990
1985
1980
1978
0
4 0
3 0
2 0
1 0
5 0
Cumulative production
Remaining recoverable reserves
Minimum estimated undiscovered recoverable reserves
Maximum estimated undiscovered recoverable reservesB
illio
n (
10 )
bar
rels
oil
equ
ival
ent
9
TO
TA
L O
IL, G
AS
AN
D C
ON
DE
NS
AT
E
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62.7 BBOECUMULATIVEPRODUCTION
REMAININGRECOVERABLERESERVES
MAXIMUM UNDISCOVEREDRECOVERABLERESERVES
82.3 BBOE
1983
1998
UK ULTIMATE RECOVERABLE RESERVES
28.57.5
26.6
30.1 26.3
25.9
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HISTORICAL PREDICTIONS OF UK OIL PRODUCTION
1
2
3
4
0
2010
2015
2020
200
5
2000
199
5
1990
1985
1980
197
5
1970
1965
Mill
ion
bar
rels
oil
per
day
OIL
UKOOA: 1996
Actual production (DTI 1999)
Wood Mackenzie: 1977, 1985, 1989 & 1993
Daly : 1996et al.
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• UK daily production averaging 3MMBOE to 2010
• Buoyant NW Europe economy
• Exciting potential for small, medium and large
companies
• Government committed to facilitating innovative
thinking, cost reduction and licence trading
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Scotland
IrelandIRISH SEA
NORTH SEA
England
Shetland
FaroeIslands
Permian or younger paleohigh
Field
Atlantic Margin
UNDISCOVERED: ?30 BBOE
North Sea Oil Province
North Sea Gas Province
UK Onshore& S+W of UK
ATLANTIC MARGIN
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• Around 65% of undiscovered reserves lie
within 50 km of existing infrastructure
• Frontier basins of Atlantic Margin offer
greatest potential for major new reserves -
gas potential not yet assessed by DTI