L10 gas field

Last updated
L10 gas field
CountryNetherlands
RegionNorth Sea
Location/blockL10
Offshore/onshoreOffshore
Coordinates 53°24′14″N04°12′07″E / 53.40389°N 4.20194°E / 53.40389; 4.20194 Coordinates: 53°24′14″N04°12′07″E / 53.40389°N 4.20194°E / 53.40389; 4.20194
OperatorsPlacid International Oil Limited; Gaz de France Suez; Neptune Energy
OwnerPlacid International Oil Limited; Gaz de France Suez; Neptune Energy
Field history
DiscoveryFebruary 1970
Start of development1972
Start of production1976
Production
Producing formationsRotliegendes sandstone

The L10 gas field is a major natural gas producing field and hub in the Netherlands sector of the North Sea, about 65 km west of Den Helder. The field started producing gas in 1976 and was still operational in 2021.

Contents

The field

The L10 gas field is located in the Southern North Sea. [1] The field was discovered by Placid International Oil Limited in February 1970. [2] The gas reservoir is an Upper Rotliegendes sandstone at a depth of 3,772 to 3,800 metres. The properties of the gas are: [3] [4]

L10 field typical gas properties
Gas composition and propertyValue
Methane84.75 %
Carbon dioxide2.73 %
Nitrogen6.1 %
Hydrogen sulfideNil
Gross calorific value 39.19 MJ/m3

Development

The L10 gas reservoir was developed by a number of offshore installations across the L10 Block. The L10-A complex is the hub of the field, it receives gas from its bridge-linked riser platform, from L Block satellite platforms, and from the adjacent Block 12. [2] [5] [4]

L10 Field Offshore installations
InstallationCoordinatesWater depthPlatformFunctionTypeLegsWell slotsInstalledProduction startProduction to
L10-A Complex53°24’14”N 04°12’07”E28 mL10-A Drilling PlatformDrilling, wellheads, accommodationSteel jacket1012November 19721976Bridge linked to L10-AP
L10-A Production PlatformProcessingSteel jacket8–19741976Uithuizen by 178 km 36-inch pipeline
L10-A Riser PlatformRisersSteel jacket4–Bridge linked to L10-AP
L10-AC Compression PlatformCompression19871987Bridge linked to L10-AP
L10 -B Complex53°27’28”N 04°13’59”E27 mL10-B Wellhead PlatformDrilling, wellhead, productionSteel jackets461974July 1975L10-A by 7.0 km, 14-inch pipeline
L10-BB  Wellhead PlatformWellheadSteel platform34July 1980Bridge linked to L10-B
L10-C Platform53°23’38”N 04°12’08”E26.5 mL10-C PlatformDrilling, productionSteel jacket461974August 1975L10-A by 1.1 km 10-inch pipeline
L10-D Platform53°24’35”N 04°12’54”E27.4 mL10-D PlatformWellheadSteel jacket461977July 1977L10-A by 1.15 km 10-inch pipeline
L10-E Complex53°25’57”N 04°14’13”E29 mL10-E PlatformWellheadSteel jacket4619771977L10-A by 4.1 km 10-inch pipeline
L10-EE PlatformWellheadSteel platform34September 19841984L10-B to L10-A pipeline by 0.08 km 10-inch pipeline
L10-F Platform53°23’13”N 04°15’39”E26 mL10-F PlatformWellheadSteel jacket46July 1980January 1981L10-A by 4.2 km 10-inch spur pipeline
L10-G Platform53°29’28”N 04°11’48”E27 mL10-G PlatformWellheadSteel jacket46July 1984August 1984L10-B by 5 km 10-inch pipeline
L10-K Platform53°29’38”N 04°16’14”E27 mL10-K PlatformWellheadSteel jacket46September 19841984L10-B by 4.8 km 10-inch pipeline
L10-L Platform53.337542N

4.377599E

27.1 mL10-L PlatformWellhead19881988L10-A
L10-M PlatformL10-M PlatformWellheadSteel platform420002000L10-A
L10-S Subsea completionsL10-S1, S2, S3, S4Wellheadsubsea–41988 (S1), 1997 (S2, S3, S4)1988, 1997L10-AP by 6-inch flowlines

The L10-A complex also receives gas from K12-C/CC, K12-D, K12-G and K12-K platforms. [5]

Gas from the field is transported through the 178 km, 36-inch diameter Noordgastransport pipeline from the L10-A Complex to Uithuizen. The design capacity of the 36-inch pipeline is 33 million cubic metres per day. [2]

The field was initially operated by Placid International Oil Limited, then Gaz de France Suez, then by Neptune Energy. [2] [6]

Decommissioning

In June 2020 Neptune Energy announced that it had decommissioned three platforms in the L10 Field. These were the satellite platforms L10-C, L10-D and L10-G. [7]

In December 2020 Neptune Energy began a feasibility study into whether depleted gas fields near L10-A, L10-B and L10-E could be used to sequester carbon dioxide. The capacity of the reservoirs is around 120-150 million tonnes of CO2 and the annual injection rate would be about 5-8 million tonnes per year. [8]

See also

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References

  1. ↑ Department of Trade and Industry (1994). The Energy Report. London: HMSO. pp. Map 3. ISBN   0115153802.
  2. 1 2 3 4 Oilfield Publications Limited (1985). The North Sea Platform Guide. Ledbury UK: Oilfield Publications Limited. pp. 434–53.
  3. ↑ "Fact sheet L10-6" (PDF). Retrieved 8 October 2021.{{cite web}}: CS1 maint: url-status (link)
  4. 1 2 "Dutch Offshore Gas: a success story". wur.nl. Retrieved 8 October 2021.{{cite web}}: CS1 maint: url-status (link)
  5. 1 2 "L10 and L11a gas fields". abarrelfull. Retrieved 8 October 2021.{{cite web}}: CS1 maint: url-status (link)
  6. ↑ "Neptune energy Our activities Activities". NeptuneEnergy.com. Retrieved 8 October 2021.{{cite web}}: CS1 maint: url-status (link)
  7. ↑ "Neptune decommissions three platforms in Dutch North Sea". offshore-energy.biz. Retrieved 8 October 2021.{{cite web}}: CS1 maint: url-status (link)
  8. ↑ "Neptune to conduct Dutch North Sea CCS feasibility study" . Retrieved 8 October 2021.{{cite web}}: CS1 maint: url-status (link)
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