Statfjord oil field: Difference between revisions

Statfjord
Statfjord
	North Sea Fields
	Location of Statfjord
Country	Norway, Scotland
Region	North Sea
Offshore/onshore	Offshore
Coordinates	61°15′20″N 1°51′14″E / 61.25556°N 1.85389°E
Operator	Equinor
Field history
Start of production	1979
Peak of production	January 16, 1987
Abandonment	2032
Production
Current production of oil	70,000 barrels per day (~3.5×106 t/a)
Current production of gas	none

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The Statfjord oil field is a large oil and gas field covering 580 km² along the U.K.-Norwegian boundary of the North Sea at a water depth of 145 m, discovered in 1974 by Mobil and since 1987 operated by Equinor.^[1]

It is a trans-median field crossing the Norwegian and UK North Sea Boundary with approximately 15% being in the UK Continental Shelf waters. At peak production it produces over 700,000 barrels (110,000 m³) of oil per day. Oil is loaded offshore and taken directly to refineries; gas is transported via the Statpipe pipeline to mainland Norway.

Geology

The field is located in the northern part of the Viking Graben, north of the Viking Trough and east of the East Shetland Platform, in the same general area as the Brent oilfield discovered in 1971, and the Cormorant oilfield, Thistle oil field, Dunlin oilfield, Heather oil field and the Hutton oilfield, all discovered by 1973.^[2] A regional grid of reflection seismology lines showed the Brent structural trend extended into the area, forming a "large northeast-trending and northwesterly tilted" (at 6-8 degrees) Fault block, partly eroded on the east flank, with Jurassic and Cretaceous shales trapping any oil in the Middle Jurassic Brent deltaic and Late Triassic-Early Jurassic Statfjord fluvial sandstones originating from the Kimmeridge Clay Formation.^[3] The field is on the same structural trend but separated from the Brent field, 20 km to the southwest, by normal faulting and a structural saddle.^[4]

A Conoco 211/24-1 well drilled in 1972-1973 on the U.K. side of the structure turned out to be downdip to the Oil-water contact and it was not until the April 1974 Mobil well 33/12-1, on the Norwegian side, that oil was discovered in 160 m of Brent Formation.^[5] A second well "established an oil-water contact at 2584 m subsea" and a third well discovered a 127 m oil column in the Statfjord Formation with an oil-water contact 2806 m subsea.^[5]

Production

The Statfjord field has three condeep concrete production platforms, A, B^[6] and C^[7] Each platform is made up of approximately 250,000 tonnes of concrete with 40,000 tonnes of top-side processing and accommodation facilities.

Statfjord holds the record for the highest daily production ever recorded for a European oil field (outside Russia) : 850,204 barrels (135,171.6 m³) (crude oil plus natural gas liquids) were produced on January 16, 1987.^[8]

Statfjord holds one more record - the biggest single contract in Norwegian history for the construction of Statfjord B platform ^[9]

Statoil has planned the "late life" of the field and expects to ultimately recover 68% of Oil in Place.^[10] but more than 60% have been produced already, leaving modest oil reserves in the order of 300 million barrels (48×10^⁶ m³), so the focus will now be placed on extracting the associated natural gas that had been re-injected into the field all over its life. As a mainly natural gas producer, Statfjord is scheduled to remain active until 2032.

Statfjord oil spill

In December 2007, thousands of tonnes of oil were spilled into the North Sea during the loading of a tanker at the Statfjord oil field. The spill, estimated at 21,750 barrels (approx 3,000 metric tons), was the country's second largest ever, according to Norway's oil safety authority. The accident happened in rough weather while the tanker Navion Britannica was loading oil from a storage buoy, according to the operator Equinor. Production had not been affected.^[11]

References

^ Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, pp. 95 and 100.
^ Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, pp. 96-98.
^ Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, pp. 99-109.
^ Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, p. 109.
^ ^a ^b Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, p. 100.
^ "The Statfjord B platform". 13 November 2019.
^ "The Statfjord C platform". 9 July 2018.
^ "The Statfjord area". Archived from the original on 2016-10-29.
^ MELAND, TRUDE (23 May 2018). "The biggest single contract in Norwegian history". Norwegian Petroleum Museum.
^ "Statfjord late life".
^ "Oil spill in North Sea off Norway". BBC News. 12 December 2007. Retrieved 4 June 2010.

External links

[1] Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, pp. 95 and 100.

[2] Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, pp. 96-98.

[3] Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, pp. 99-109.

[4] Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, p. 109.

[auto-5] Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, p. 100.

[6] "The Statfjord B platform". 13 November 2019.

[7] "The Statfjord C platform". 9 July 2018.

[8] "The Statfjord area". Archived from the original on 2016-10-29.

[9] MELAND, TRUDE (23 May 2018). "The biggest single contract in Norwegian history". Norwegian Petroleum Museum.

[10] "Statfjord late life".

[11] "Oil spill in North Sea off Norway". BBC News. 12 December 2007. Retrieved 4 June 2010.

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@@ Line 6: / Line 6: @@
 | coordinates = {{coord|61|15|20|N|1|51|14|E|type:landmark|display=inline,title}}
 | coordinates_ref    =
+| relief = yes
 | region = [[North Sea]]
 | country = [[Norway]], [[Scotland]]
 | locblock =
 | offonshore = Offshore
-| operator  =  [[Statoil]]
+| operator  =  [[Equinor]]
 | partners =
 | image = North Sea Fields Zoom north.jpg
@@ Line 17: / Line 18: @@
 | startofproduction = 1979
 | peakofproduction = January 16, 1987
-| expectedabandonment  = 2019
+| expectedabandonment  = 2032
 | oil_production_bbl/d = 70000
 | production_gas_ref   = none<!--not really a ref: cheating-->
@@ Line 25: / Line 26: @@
 }}
-The '''Statfjord oil field''' is an enormous oil and gas field covering 580&nbsp;km<sup>2</sup> in the U.K.-Norwegian boundary of the [[North Sea]] at a water depth of 145 m, discovered in 1974 by [[Mobil]] and since 1987 operated by [[Statoil]].<ref>Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, {{ISBN|0891813063}}, pp. 95 and 100.</ref>
+The '''Statfjord oil field''' is a large oil and gas field covering 580&nbsp;km<sup>2</sup> along the U.K.-Norwegian boundary of the [[North Sea]] at a water depth of 145 m, discovered in 1974 by [[Mobil]] and since 1987 operated by [[Equinor]].<ref>Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, {{ISBN|0891813063}}, pp. 95 and 100.</ref>
-It is a trans-median field crossing the Norwegian and UK North Sea Boundary with approximately 15% being in the UK Continental Shelf waters. At peak production it produced over {{convert|700000|oilbbl}} of oil per day.  Oil is loaded offshore and taken directly to refineries; gas is transported via the [[Statpipe]] pipeline to mainland [[Norway]].
+It is a trans-median field crossing the Norwegian and UK North Sea Boundary with approximately 15% being in the UK Continental Shelf waters. At peak production it produces over {{convert|700000|oilbbl}} of oil per day.  Oil is loaded offshore and taken directly to refineries; gas is transported via the [[Statpipe]] pipeline to mainland [[Norway]].
+==Geology==
-The Statfjord field has three [[condeep]] concrete [[Oil platform|production platforms]], A, B and C. Each platform is made up of approximately 250,000 tonnes of concrete with 40,000 tonnes of top-side processing and accommodation facilities.
+The field is located in the northern part of the [[Viking Graben]], north of the [[Viking Trough]] and east of the [[East Shetland Platform]], in the same general area as the [[Brent oilfield]] discovered in 1971, and the [[Cormorant oilfield]], [[Thistle oil field]], [[Dunlin oilfield]], [[Heather oil field]] and the [[Hutton oilfield]], all discovered by 1973.<ref>Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, {{ISBN|0891813063}}, pp. 96-98.</ref>  A regional grid of [[reflection seismology]] lines showed the Brent structural trend extended into the area, forming a "large northeast-trending and northwesterly tilted" (at 6-8 degrees) [[Fault block]], partly [[eroded]] on the east flank, with [[Jurassic]] and [[Cretaceous]] [[shale]]s trapping any oil in the Middle Jurassic Brent [[River delta|deltaic]] and [[Late Triassic]]-[[Early Jurassic]] [[Statfjord Formation|Statfjord]] [[fluvial]] [[sandstone]]s originating from the [[Kimmeridge Clay]] Formation.<ref>Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, {{ISBN|0891813063}}, pp. 99-109.</ref>  The field is on the same structural trend but separated from the Brent field, 20&nbsp;km to the southwest, by [[normal fault]]ing and a structural saddle.<ref>Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, {{ISBN|0891813063}}, p. 109.</ref>
+A Conoco 211/24-1 well drilled in 1972-1973 on the U.K. side of the structure turned out to be downdip to the [[Oil-water contact]] and it was not until the April 1974 [[Mobil]] well 33/12-1, on the Norwegian side, that oil was discovered in 160 m of Brent Formation.<ref name="auto">Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, {{ISBN|0891813063}}, p. 100.</ref>  A second well "established an oil-water contact at 2584 m subsea" and a third well discovered a 127 m oil column in the Statfjord Formation with an oil-water contact 2806 m subsea.<ref name="auto"/>
-Statfjord holds the record for the highest daily production ever recorded for a European oil field (outside Russia) : {{convert|850204|oilbbl}} ([[crude oil]] plus [[natural gas liquids]]) were produced on January 16, 1987.<ref>[http://www.statoil.com/en/ouroperations/explorationprod/ncs/statfjord/pages/default.aspx]</ref>
-Statoil has planned the "late life" of the field and expects to ultimately recover 68% of [[Oil in Place]].<ref>[http://www.statoil.com/en/OurOperations/ExplorationProd/ncs/statfjord/StatfjordLateLife/Pages/default.aspx Statfjord late life<!-- Bot generated title -->]</ref> but more than 60% have been produced already, leaving modest oil reserves in the order of {{convert|300|Moilbbl}}, so the focus will now be placed on extracting the associated natural gas that had been re-injected into the field all over its life. As a mainly natural gas producer, Statfjord is scheduled to remain active until 2019.
-==Geology==
+==Production==
+[[File:Statfjord A.JPG|thumb|Statfjord A in the North Sea]]
-The field is located in the northern part of the [[Viking Graben]], north of the [[Viking Trough]] and east of the [[East Shetland Platform]], in the same general area as the [[Brent oilfield]] discovered in 1971, and the [[Cormorant oilfield]], [[Thistle oil field]], [[Dunlin oilfield]], Heather oil field and the [[Hutton oilfield]], all discovered by 1973.<ref>Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, {{ISBN|0891813063}}, pp. 96-98.</ref>  A regional grid of [[reflection seismology]] lines showed the Brent structural trend extended into the area forming a "large northeast-trending and northwesterly tilted" (at 6-8 degrees) [[Fault block]], partly [[eroded]] on the east flank, with [[Jurassic]] and [[Cretaceous]] [[shale]]s trapping any oil in the Middle Jurrasic Brent [[River delta|deltaic]] and [[Late Triassic]]-[[Early Jurrasic]] Stratfjord [[fluvial]] [[sandstone]]s originating from the [[Kimmeridge Clay]] Formation.<ref>Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, {{ISBN|0891813063}}, pp. 99-109.</ref>  The field is on the same structural trend but separated from the Brent Field, 20&nbsp;km to the southwest, by [[normal fault]]ing and a structural saddle.<ref>Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, {{ISBN|0891813063}}, p. 109.</ref>
+[[File:StatfjordA(Jarvin1982).jpg|thumb|Statfjord A in 1982]]
+[[File:STATFJORD oilfield.png|thumb|Statfjord annual oil production]]
+[[File:North Sea Oil IMG 0571 Statfjord.JPG|thumb|upright|Oil from the Statfjord field]]
+[[File:Olje Fra STATFJORD 1979.jpg|thumb|Sample of the first oil produced in the Statfjord field in 1979.]]
+The Statfjord field has three [[condeep]] concrete [[Oil platform|production platforms]], A, B<ref>{{cite web | url=https://statfjord.industriminne.no/en/2019/11/13/1075/ | title=The Statfjord B platform | date=13 November 2019 }}</ref> and C<ref>{{cite web | url=https://statfjord.industriminne.no/en/2018/07/09/the-statfjord-c-platform/ | title=The Statfjord C platform | date=9 July 2018 }}</ref> Each platform is made up of approximately 250,000 tonnes of concrete with 40,000 tonnes of top-side processing and accommodation facilities.
+Statfjord holds the record for the highest daily production ever recorded for a European oil field (outside Russia) : {{convert|850204|oilbbl}} ([[crude oil]] plus [[natural gas liquids]]) were produced on January 16, 1987.<ref>{{cite web|url=http://www.statoil.com/en/ouroperations/explorationprod/ncs/statfjord/pages/default.aspx|url-status=dead|archive-url=https://web.archive.org/web/20161029134140/www.statoil.com/en/ouroperations/explorationprod/ncs/statfjord/pages/default.aspx|archive-date=2016-10-29|title=The Statfjord area }}</ref>
-A Conoco 211/24-1 well drilled in 1972-1973 on the U.K. side of the structure turned out to be downdip to the [[Oil-water contact]] and it wasn't until the April 1974 [[Mobil]] well 33/12-1, on the Norwegian side, that oil was discovered in 160 m of Brent Formation.<ref>Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, {{ISBN|0891813063}}, p. 100.</ref>  A second well "established an oil-water contact at 2584 m subsea" and a third well discovered a 127 m oil column in the Statfjord Formation with an oil-water contact 2806 m subsea.<ref>Kirk, R.H., 1980, Statfjord Field-A North Sea Giant, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T. editor, AAPG Memoir 30, Tulsa: American Association of Petroleum Geologists, {{ISBN|0891813063}}, p. 100.</ref>
+Statfjord holds one more record - the  biggest single contract in Norwegian history for the construction of Statfjord B platform <ref>{{cite web |last1=MELAND |first1=TRUDE |title=The biggest single contract in Norwegian history |date=23 May 2018 |url=https://statfjord.industriminne.no/en/2018/05/23/the-biggest-single-contract-in-norwegian-history/ |publisher=Norwegian Petroleum Museum}}</ref>
+Statoil has planned the "late life" of the field and expects to ultimately recover 68% of [[Oil in Place]].<ref>{{Cite web|url=http://www.statoil.com/en/OurOperations/ExplorationProd/ncs/statfjord/StatfjordLateLife/Pages/default.aspx|title=Statfjord late life<!-- Bot generated title -->}}</ref> but more than 60% have been produced already, leaving modest oil reserves in the order of {{convert|300|Moilbbl}}, so the focus will now be placed on extracting the associated natural gas that had been re-injected into the field all over its life. As a mainly natural gas producer, Statfjord is scheduled to remain active until 2032.
 ==Statfjord oil spill==
-In December 2007, thousands of tonnes of oil were spilled into the North Sea during the loading of a tanker at the Statfjord oil field. The spill, estimated at 21,750 barrels (approx 3,000 metric tons), was the country's second largest ever, according to Norway's oil safety authority. The accident happened in rough weather while the tanker ''Navion Britannica'' was loading oil from a storage buoy, according to the operator Statoil.<ref>{{cite news | author= | title=Oil spill in North Sea off Norway | url=http://news.bbc.co.uk/1/hi/world/europe/7140645.stm | work=BBC News | date= 12 December 2007 | accessdate=4 June 2010}}</ref>o
+In December 2007, thousands of tonnes of oil were spilled into the North Sea during the loading of a tanker at the Statfjord oil field. The spill, estimated at 21,750 barrels (approx 3,000 metric tons), was the country's second largest ever, according to Norway's oil safety authority. The accident happened in rough weather while the tanker ''Navion Britannica'' was loading oil from a storage buoy, according to the operator Equinor. Production had not been affected.<ref>{{cite news | title=Oil spill in North Sea off Norway | url=http://news.bbc.co.uk/1/hi/world/europe/7140645.stm | work=BBC News | date= 12 December 2007 | accessdate=4 June 2010}}</ref>
-==Gallery==
-<gallery widths=200px>
-file:Statfjord A.JPG|Statfjord A in the North Sea
-file:StatfjordA(Jarvin1982).jpg|Statfjord A in 1982
-File:STATFJORD oilfield.png|Statfjord annual oil production
-file:North Sea Oil IMG 0571 Statfjord.JPG|Oil from the Statfjord field
-</gallery>
 ==See also==
@@ Line 60: / Line 61: @@
 ==External links==
+[[File:Norsk oljeproduksjon pr aar pr felt.png|thumb|left|Petroleum production of Norway by year and oil field]]
-{{commons category|Statfjord}}
+{{commons category|Statfjord Oil and Gas Field}}
 {{wikinews|North Sea oil spill is Norway's second worst}}
-* [http://www.statoil.com/en/ouroperations/explorationprod/ncs/statfjord/pages/default.aspx The Statfjord area]
+* [https://www.equinor.com/en/what-we-do/norwegian-continental-shelf-platforms/statfjord.html The Statfjord area]
 * [http://www.statoil.com/en/ouroperations/decommissioning/sfadecommissioning/pages/default.aspx Statfjord A approaches journey's end]
-* [http://www.aftenbladet.no/energi/sokkelkart/article523354.ece?english=true Statfjord in Aftenbladet Energi Interactive Energy Map]
+* [https://web.archive.org/web/20110719223246/http://www.aftenbladet.no/energi/sokkelkart/article523354.ece?english=true Statfjord in Aftenbladet Energi Interactive Energy Map]
 {{Resources in Norway}}
-[[Category:Oil fields in Norway]]
+[[Category:Equinor oil and gas fields]]
 [[Category:Natural gas fields in Norway]]
-[[Category:North Sea energy]]
+[[Category:North Sea oil fields]]
+[[Category:Oil fields in Norway]]
 [[Category:1979 establishments in Norway]]
-[[Category:2007 industrial disasters]]
-[[Category:Man-made disasters in Norway]]
-[[Category:Statoil oil and gas fields]]

v t e Resources in Norway
Oil	Blane Brage Draugen Edvard Grieg Ekofisk Gjøa Goliat Grane Gullfaks Gyda Heidrun Heilo Johan Sverdrup Norne Oseberg East Oseberg South Oseberg Oselvar Snorre Statfjord Tambar Ula Valhall Yme
Natural gas	Frigg Heimdal Ormen Lange Skirne Sleipner Snøhvit Troll Vale