K14-K18 gas fields explained

K14-K18 gas fields
Country:Netherlands
Region:North Sea
Locblocks:K14, K15, K16, K17, K18
Offonshore:Offshore
Operators:NAM, Wintershall
Discovery:1970 - 2005
Startofproduction:1977
Formations:Rotliegendes / Zeckstein

The K14-K18 gas fields are significant natural gas producing areas in the Netherlands sector of the North Sea, about 120 km north west of Den Helder. These five contiguous fields started producing gas in 1977 and are still operational.

The fields

The K14-K18 gas fields are located in the Southern North Sea. They extend over the Netherlands Offshore Blocks K14, K15, K16, K17 and K18. The gas reservoirs have the following properties: [1] [2] [3]

K14
K15-AK15-BK16K17K18-FBK18 Golf
Producing horizonRotliegendes sandstoneRotliegendes sandstoneRotliegendes sandstoneZechstein 3 carbonatesSlochteren FormationSlochteren FormationRotliegendes sandstone
Depth, metres3,0253,3253,9002,0012,6864,2173,750
Type of gasHigh calorific value (CV)Low CV & 24% CO238.19 MJ/m3, 10.05 % nitrogen34.69 MJ/m3, 10.6 % nitrogen35.8 MJ/m3, 10.79 % nitrogen
Recoverable reserves424 billion cubic feet353 billion cubic feet671 billion cubic feet0.5 billion m32.3 billion m30.5 to 1.0 billion m3
Discovery1970197419751987198019922005
Initial operatorNederlandse Aardolie Maatschappij BV (NAM) NAMNAMELF Petroland (exploration)NAMConoco (exploration)Wintershall Noordzee BV

Development

The K14-K18 reservoirs were developed over an extended period by a number of offshore installations across the five Blocks.

K14 and K15 installations

The initial installations in blocks K14 and K15 were:

K14-FA1
K14-FA1-CK15-FA1K15-FB1
FunctionDrilling, production, accommodationCompressionDrilling, productionDrilling, production, accommodation
TypeSteel jacketSteel jacketSteel jacketSteel jacket
Coordinates53°16’10”N 03°37’39”EBridge link to K14-FA153°14’53”N 03°59’41”E53°16’35”N 03°22’28”E
Water depth, metres262627.426
DesignerCrest / MarConDe GrootShell / CrestCrest
Jacket fabricationDe Groot THCDe GrootNAPM
Deck fabricationDe Groot De GrootDe GrootDe Groot
Jacket weight, tonnes500?1,245?
Legs1081010
Piles1081010
Deck weight, tonnes940Deck 2,250; modules 3,7501,300?
Accommodation241002422
Well slots9Nil69
Production throughput7.4 million m3/day600 MMSCFD7.4 million m3/day10 million m3/day
InstallationFebruary 19771985December 19781982
Gas production from these platforms was to the following pipelines.
K14 and K15 pipelines!From!To!Length !Diameter!Notes
K14-FA1WGT line0.14 km24”Sidetap
K15-FAWGT line0.06 km24”Sidetap
K15-FBCallantsoog72 km24”

K14, K15 and K17 installations

The fields were developed further from the mid-1980s through five satellite installations.[4] [5] [6]

K14-FB1
K15-FC-1K15-FG-1K15-FK-1K17-FA-1
FunctionSatelliteSatelliteSatelliteSatelliteSatellite
TypeSteel jacketSteel jacketSteel jacketSteel jacketMonotower
Coordinates53.16084 3.3135453.25382 3.7640853.30723 3.9482553.21879 3.9206253.06473 3.53866
Water depth, metres26.726.12525.625.6
Startup19851989199020022005
Gas from the K14-FB1 installation is routed to the K14-FA1 installation. Gas from the K15 installations is routed to the K14-FA1 installation. Gas from the K17 Monotower is routed to the K14-FB1 installation.

K18 installations

The K18 Golf gas field is a military restricted zone which necessitated development by subsea satellites.[7]

K18 G1
K18 G2K18 G4
FunctionSatelliteSatelliteSatellite
TypeSubseaSubseaSubsea
Coordinates53.0923 3.574753.0923 3.574753.1023 3.5813
Water depth, metres20.927.527.5
Startup201120142014
The output projection was 375.7 million normal cubic meters per year. Gas is routed to the K14-FA1 installation.

The Kotter oil field is in Block K18, however there is no export route for the gas and the K18-FB gas accumulation has not been developed.

K16 Field

The K16 Field is a stranded asset with no nearby gas transport infrastructure. The field has not been developed.[8]

See also

Notes and References

  1. Book: Oilfield Publications Limited. The North Sea Platform Guide. Oilfield Publications Limited. 1985. Ledbury. 402–10.
  2. Web site: Fossil Gas Extraction Sites in Europe. 19 November 2021.
  3. Web site: Fact sheet K18. 19 November 2021.
  4. Web site: Natural gas and oil of the Netherlands 2007. 19 November 2021.
  5. Web site: Platforms Netherlands Continental Shelf. 19 November 2021.
  6. Web site: OSPAR Offshore Installations Inventory 2017. 19 November 2021. OSPAR.ORG.
  7. Web site: K18 oil and gas fields. 19 November 2021.
  8. Web site: Fact sheet K16-5. 19 November 2021.

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