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Per Blystad1
Vladimir Poroskun2
Norwegian Petroleum Directorate, NorwayMinistry of Natural Resources, Russian Federation
Objective
• Demonstrate application of the UNFC to fields• Demonstrate how UNFC can be used to bridge
between different national classification systems• Check the UNFC from different position
– Are UNFC used differently by assessors based in different classification systems?
FIELDS
UNFC applied to the Gullfaks field, Norway
Cross section through the Gullfaks field
DominoAccommodation
Horst complex
Moving from one large field to many small accumulationsTime lapse seismic, advanced drilling and completion
and other advanced techniques help direct recovery efforts
1985
1999
WATER
OIL
TOP RESERVOIR
CAP ROCK
OIL
CAP ROCK
WATER FLUSHED
WATER
OIL
Top reservoir
OWC
Gullfaks oil resources in % of stock tank oil initially in place
Produced
88 Forecast Rev.PDO
April 1993 Forecast
Oct. 1993 Forecast
Oct. 1994 Forecast
Oct. 1995 Forecast
Aug. 1996 Forecast
RSP 1996
RSP 1997
RSP 1998
RSP 1999
35
30
25
20
15
10
5
01986 1988 1990 1992 1994 1996 1998 2000 2004
MSm
/y
ear
3
Recoverable quantities Recovery factor E-values F values G-values
Produced Sold and delivered 0 49,6 % 0
Proved developed 1 1 1 1Proved (includes proved develped reserves) 1 1 1 1
Reserves (includes proved reserves) In production 1 7,0 % 1 1 1+2Under developement - First project 2F 0,0 % 1 1Under development - additional project 2A 0,5 % 1 1 1+2Committed development on hold - First project 3F 0,0 % 1 1 1+2Committed development on hold - Additional project 3A 0,0 % 1 1 1+2
Contingent resources In development planning - First Project 4F 0,0 % 2In development planning - Additional Project 4A 0,0 % 2Recovery is likely, but unclarified First project 5F 0,0 % 2Recovery is likely, but unclarified Additional project 5A 1,0 % 2 2 2Recovery is not very likely 6 0,2 % 3 2 2Resources have not been evaluated - First project 7F 0,0 % 2Resources have not been evaluated - Additional project 7A 1,7 % 2 2 3
Prospective resources Resources in prospects 8 0,1 % 2 2 4Resources in leads and unmapped resources 9 0,1 % 2
UNFC applied to Gullfaks Field oil recovery
E1
E2
E3
G1 G2 G3 G4
I1 I2 I3 I4
F1 Committed projects% oil recovery F2 Contingent projects
% oil recovery
F3 Exploration projects% oil recovery
E1: CommercialE2: Contingent commercialityE3: Not commercialG1: Appropriately defined geologyG2: Sufficiently defined geology G3: Poorly defined geologyG4: Prospective geology
: Invalid combinations
: Not normally used
: In use
0.2%1%
0.2%
1.7%
Reserves7.5%
Producedquantities% oil recovery
50%
Unrecoverable oil in place quantitiesIn Mill Sm3
39.4%
Initial oil in place: 580 to 600 mill Sm3
8.8
11.6
13.0 9.810.1
9.6
7.22.0
1.2 7.3
1.6
10.6
7.8
7.0
17.3
15.5
2.0
3.8
5.0
5.0
5.0
10.015.0
10.0
10.0
5.0
10.0
5.0
86
96
94
90j
jl
l
i
g
j
i
l
ll
f
3
88
80
98
108
170
23
100
2
1
85155
50
51
h
h
93
9279
j
h
SPE / WPC / AAPG
8.8
11.6
13.0 9.810.1
9.6
7.22.0
1.2 7.3
1.6
10.6
7.8
7.0
17.3
15.5
2.0
3.8
5.0
5.0
5.0
10.015.0
10.0
10.0
5.0
10.0
5.0
86
96
94
90j
jl
l
i
g
j
i
l
ll
f
3
88
80
98
108
170
23
100
2
1
85155
50
51
h
h
93
9279
j
h
Russian Federation
СD
АB
8.8
11.6
13.0 9.810.1
9.6
7.22.0
1.2 7.3
1.6
10.6
7.8
7.0
17.3
15.5
2.0
3.8
5.0
5.0
5.0
10.015.0
10.0
10.0
5.0
10.0
5.0
86
96
94
90j
jl
l
i
g
j
i
l
ll
f
3
88
80
98
108
170
23
100
2
1
85155
50
51
h
h
93
9279
j
h
UNFC
E1F1G20
E1F1G30
E1F1G11
E1F1G12
Classification of a Russian field according to different classifications
8.8
11.6
13.0 9.810.1
9.6
7.22.0
1.2 7.3
1.6
10.6
7.8
7.0
17.3
15.5
2.0
3.8
5.0
5.0
5.0
10.015.0
10.0
10.0
5.0
10.0
5.0
86
96
94
90j
jl
l
i
g
j
i
l
ll
f
3
88
80
98
108
170
23
100
2
1
85155
50
51
h
h
93
9279
j
h
SPE / WPC / AAPG
8.8
11.6
13.0 9.810.1
9.6
7.22.0
1.2 7.3
1.6
10.6
7.8
7.0
17.3
15.5
2.0
3.8
5.0
5.0
5.0
10.015.0
10.0
10.0
5.0
10.0
5.0
86
96
94
90j
jl
l
i
g
j
i
l
ll
f
3
88
80
98
108
170
23
100
2
1
85155
50
51
h
h
93
9279
j
h
Russian Federation
СD
АB
8.8
11.6
13.0 9.810.1
9.6
7.22.0
1.2 7.3
1.6
10.6
7.8
7.0
17.3
15.5
2.0
3.8
5.0
5.0
5.0
10.015.0
10.0
10.0
5.0
10.0
5.0
86
96
94
90j
jl
l
i
g
j
i
l
ll
f
3
88
80
98
108
170
23
100
2
1
85155
50
51
h
h
93
9279
j
h
UNFC
E1F1G13
E1F1G2
E1F1G11
E1F1G12
Classification of a Russian field according to different classifications
8.8
11.6
13.0 9.810.1
9.6
7.22.0
1.2 7.3
1.6
10.6
7.8
7.0
17.3
15.5
2.0
3.8
5.0
5.0
5.0
10.015.0
10.0
10.0
5.0
10.0
5.0
86
96
94
90j
jl
l
i
g
j
i
l
ll
f
3
88
80
98
108
170
23
100
2
1
85155
50
51
h
h
93
9279
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h
NORWAY
2F
4F
1
1
Illustrative cases
Classification of a fieldField project Norway UNFCP
E F GReserves (Committed projects)Developed Producing RC1 10 11 10-20In development RC2F 10 12 10-20
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SSS
SS
SS
SS
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SS
SSS
Prospective resources (Exploration projects)
Prospect 1 RC8 20 31 41
Prospect 2 RC8 20 32 41
Contingent resources (Contingent projects)In planning RC4F 20 21 20
Unclarified RC5A 20 22 20
Undefined RC7F 20 23 30
2C
1
1,1,1-2
2,2,2
2,3,4
2,2,3
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FIELD, Norway
E-axis F-axis G-axis1 10 11 10 - 20 A
2F 10 12 10 - 20 A4F 20 21 20 B + C15A 20 22 20 B + C17F 20 23 30 C1 + C28 1 20 31 41 D18 2 20 32 41 D1
Classification
Norway UNFCP Russian Federation
X
X
L
X
(NORWAY, DISCOVERY 4F)
Gas discovery, in planning phase (RC 4F)Gas discovery in new play model. Main reservoir turbiditic sand.
A secondary, less known reservoir was discovered above the main reservoir.
Production planned through evenly spread subsea production wells. Transport in pipeline to European market.
Economic axis: The discovery is economic, but some issues related to production and transportation (pipeline) is not yet solved
Contingent commerciality
Field axis: The project is in the planning phase, plan for development and production is soon to be delivered.
Contingent project in planning
Geology axis: Several exploration wells are drilled. Geologic modell reasonable well understood.
Sufficiently defined geology
E20F21G20
Secondary reservoir: (Contingent commerciality, Contingent project unclarified, Poorly defined geology)
E20F22G30
X
X
L
X
(NORWAY, DISCOVERY 4F)
E-axis F-axis G-axis4F 20 21 20 B + C15F 20 22 30 B + C1
UNFCPNorway Russian Federation
Classification
X
(OIL DISCOVERY, RC 5F)
E-axis F-axis G-axis5F 20 22 30 B + C1
UNFCPNorway Russian Federation
Classification
Oil discovery close to infrastructure. Will be produced when there is free capacity in the pipeline 10 years from now.
Restrictions for production in the area due to establishment of a Marine National park.
E-axis F-axis G-axis5F (6) 30 22 30 B + C1
UNFCPNorway Russian Federation
Classification
PROSPECTS
Norway RC 8
UNFC 2.3.41
310 030 903 0803060 3 080-sei smic profi- iso line
-D-С
-В-pro ducing w
Norway: 7F -> 5FUNFC: 2,2,3
Play
PLAY
FIELDDISCOVERY
PROSPECT
(NORWAY, PLAY)
- One field is developed
- Several discoveries and prospects exist in the play
Prospective resources in the play
Norway RC 9
UNFC 2,3,4
RF ?D3
Conclusions• UNFC works well for classifying fields in Norway• UNFC can be used as a tool to compare different
classification systems• UNFC can be tested by using different
classifications on the same field/discovery• Problems in comparing / harmonising Norwegian
and Russian classifications are due to different exploration, development and production practicesin onshore and offshore areas.
• To further develop and refine UNFC joint case studies should be performed.
Classification Russian
Federation
8.8
11.6
13.0 9.810.1
9.6
7.22.0
1.2 7.3
1.6
10.6
7.8
7.0
17.3
15.5
2.0
3.8
5.0
5.0
5.0
10.015.0
10.0
10.0
5.0
10.0
5.0
86
96
94
90j
jl
l
i
g
j
i
l
ll
f
3
88
80
98
108
170
23
100
2
1
85155
50
51
h
h
93
9279
j
h
С D
А B
8.8
11.6
13.0 9.810.1
9.6
7.22.0
1.2 7.3
1.6
10.6
7.8
7.0
17.3
15.5
2.0
3.8
5.0
5.0
5.0
10.015.0
10.0
10.0
5.0
10.0
5.0
86
96
94
90j
jl
l
i
g
j
i
l
ll
f
3
88
80
98
108
170
23
100
2
1
85155
50
51
h
h
93
9279
j
h
Classification SPE / WPC / AAPG
8.8
11.6
13.0 9.810.1
9.6
7.22.0
1.2 7.3
1.6
10.6
7.8
7.0
17.3
15.5
2.0
3.8
5.0
5.0
5.0
10.015.0
10.0
10.0
5.0
10.0
5.0
86
96
94
90j
jl
l
i
g
j
i
l
ll
f
3
88
80
98
108
170
23
100
2
1
85155
50
51
h
h
93
9279
j
h
Classification UNFC
E1F1G13 E1F1G20
E1F1G11
E1F1G12
