The K7-K12 gas fields are significant natural gas producing areas in the Netherlands sector of the North Sea, about 130 km west of Den Helder. These six contiguous fields started producing gas in 1978 and are mostly still operational in 2021.

The fields The K7-K12 gas fields are located in the Southern North Sea. They extend over the Netherlands Blocks K7, K8, K9, K10, K11 and K12. The gas reservoirs have the following properties: +K7-K12 field gas reservoir propertiesBlockK7K8K9K10K11K12Producing horizonRotliegendesRotliegendesRotliegendesRotliegendesRotliegendesDepth, metres3,1503,3002,770

3,0803,160Type of gasHigh calorific value (CV)High CVHigh CVHigh CO2Recoverable reserves, billion cubic feet247720189200Discovery196919701973 and

197919711976Initial operatorNederlandse Aardolie Maatschappij BV (NAM)Nederlandse Aardolie Maatschappij BV (NAM)Gaz de FrancePennzoilNAMPlacidSubsequent operatorsNeptune Energy, Engie E&P NederlandWintershallGaz de FranceGaz de France

Development The K7-K12 reservoirs were developed by a number of offshore installations across the Blocks. +K7-K12 Field Offshore installationsFieldCoordinatesWater depth Installation designationFunctionTypeLegsWell slotsInstalledProduction startProduction toK753°34’22”N 03°18’18”E36.1K7-FA1 DrillingWellheadSteel jacket49April 1982 DeckOctober 1982Production platform, bridge linkedK7-FA1 ProductionProcessing, accommodationSteel jacket6 NilApril 1982 DeckK8-FA153.55142N 3.26727EK7-FD1SatelliteSteel jacket4199853.50125N 3.37038EK7-FB1SatelliteSteel jacket42003K853°30’00”N 03°22’13”E31.2K8-FA1Drilling, production, accommodationSteel jacket1012July 1977 DeckMarch 1978K14-FA1K8-FA1-PAccommodationSteel jacket200153°30’55N 03°22’13”E31K8-FA2Drilling,Steel jacket49October 1977September 1979K8-FA153°32’32N 03°25’25”E35K8-FA3SatelliteSteel jacket69May 19851985K7K953.52193N 3.99382E29.6K9ab-ASatelliteSteel jacket198753.55295N 3.78426E28.4K9ab-BSatelliteSteel jacket199953.65442N 3.87426E38.K9c-ASatelliteSteel jacket1987K1053.363714N 3.253964E25,

29K10-BD WellheadWellheadSteel jacket612July 1982 DeckJanuary 1983Production platform, bridge linkedK10-BP ProductionProcessing, accommodationSteel jacket6NilAugust 1982K13-C53.404257N 3.288094E29K10-CSatelliteSteel jacket46July 1982August 1983K10-BK1153°26’58N 03°20’34”E29.4K11-FA1Wellhead drillingSteel jacket431980Mar 1980K8-FA1K1253°28’36N 03°47’19”E29.5K12-AWellheadSteel Jacket46July 1983September 1983L10-A53°27’33N 03°54’21”E27.4K12-CSatellite wellheadSteel jacket46September 1984October 198453.34304N 3.89692E26.5

27.4K12-BDSatellite wellheadSteel jacket198353.34238N 3.8973K12-BPProductionSteel jacket198153.460784N 3.905925EK12-CCCompressionSteel jacket1994Bridge link to K12-BP53.42354N 3.88651E29.5K12-DSatellite wellheadSteel jacket198553.35712N 3.98373E26K12-GSatelliteSteel jacket200153.25221N 3.31354 E26K12-KWellhead platformSteel jacket2006200753.4218N 3.825E, 53.34694N 4.9475E?,

26,

46K12-S1, K12-S2, K12-S3Subsea wellheadsSubsea wellhead–1991, 2002, 2003 The principal pipelines in the fields are: +K7-K12 Fields pipelinesStartEndLength, kmDiameter, inchesFluidK7-FA1K8-FA19.418GasK8-FA1K14-FA130.924GasK8-FA2K8-FA13.810GasK8-FA3K7912GasK10-BK13-C7.420GasK10-CK10-B5.210GasK10-CK10-B5.22MethanolK11-FA1K8-FA166GasK12AL10A3014GasK12AL10A302MethanolK12CK12A/L10A line sidetap0.410GasK12CK12A/L10A line sidetap0.42MethanolK12BL10A22GasK12BL10A22MethanolK12CK12C4.510GasK12CSidetap4.32Methanol

Production Peak production from the fields was as follows: +K7-K12 Fields ProductionFieldProduction million m3/dayK7-FA16K8-FA19.2K8-FA26K8-FA33.5K11-FA11.1K12-A2.7K12-C2.7

Decommissioning The K10 and K11 installations are now closed and have been decommissioned.

See also

Helder, Helm and Hoorn oil fields Kotter and Logger oil and gas fields L4-L7 gas fields L10 gas field K12-B K13 gas fields K14-K18 gas fields

References