General information Attribute Value Wellbore nameOfficial name of wellbore based on NPD guidelines for designation of wells and wellbores.2/12-2 S TypeWellbore type. Legal values: EXPLORATION, DEVELOPMENT, OTHER (see 'Purpose' for more information)EXPLORATION PurposeFinal classification of the wellbore.
Legal values for exploration wellbores:
WILDCAT, APPRAISAL, WILDCAT-CCS, APPRAISAL-CCS.
Legal values for development wellbores:
OBSERVATION, PRODUCTION, INJECTION, INJECTION-CCS, OBSERVATION-CCS.
Legal values for other wellbores:
SOIL DRILLING (drilling in connection with track surveys and other subsurface surveys to investigate the soil conditions prior to placement of facilities),
SHALLOW GAS (drilling to investigate shallow gas before the first 'real' drilling on the location),
PILOT (drilling to investigate the geology and fluid connectors for location of the main wellbore),
SCIENTIFIC (drilling according to Law of Scientific research and exploration),
STRATIGRAPHIC (driling according to Law of Petroleum activities §2-1).APPRAISAL
StatusStatus for the wellbore. Legal values are:
BLOWOUT: A blowout has occurred in the well.
CLOSED: A development wellbore that has been closed in a shorter or longer periode. Also applies to development wellbores where drilling is completed, but production/injection has not yet been reported.
DRILLING: The well is in the drilling phase - can be active drilling, logging, testing or plugging,
JUNKED: The drilling operation has been terminated due to technical problems.
P&A: Exploration: The well is plugged and abandoned, and can not be reentered for further use. Development wells: The production/injection from/to the well is stopped and the well is plugged. The wellhead is removed or else made unavailable for further well operations.
PLUGGED: The wellbore has been plugged, but the upper parts of the wellbore can be re-used. A sidetrack might be drilled at a later stage.
PRODUCING: It was produced from the wellbore at the time of the operators last monthly report to the NPD.
INJECTING: It was injected to the wellbore at the time of the operators last monthly report to the NPD.
PREDRILLED: The upper part of the well has been drilled, usually as part of a batch-drilling campaign covering several wellbores.
RE-CLASS TO DEV: Exploration wellbore that is reclassified to a development wellbore.
RE-CLASS TO TEST: Exploration wellbore that is reclassified to test production.
SUSPENDED: The drilling operation in the wellbore has been temporarily stopped. The current plan is to continue drilling later on.
P&AFactmaps in new window
Main areaName of the area on the Norwegian Continental Shelf where the wellbore is located. Legal values: BARENTS SEA, NORWEGIAN SEA, NORTH SEA.NORTH SEA DiscoveryName of the discovery the wellbore is related to. Well nameOfficial name of the parent well for the wellbore based on NPD guidelines for designation of wells and wellbores.2/12-2 Seismic locationPosition of spud location on seismic survey lines. SP: shotpoint.NH 8702 ROW 306 COLUMN 453 Production licenceOfficial designation of the production licence the wellbore was drilled or planned to be drilled from ( well head posistion). Drilling operatorName of the licensee starting the drilling operation on behalf of the active production license (well head position). This will usually equal the operator of the production license.Norsk Hydro Produksjon AS Drill permitThe drilling permit number together with the version of the drilling permit as stated in the drilling permit granted by the NPD.629-L Drilling facilityNPD's name of the facility which the wellbore was drilled from. Drilling daysNumber of days from wellbore entry to wellbore completion.212 Entered dateThe date when he wellbore was spudded. For sidetracks: The date when new formation was drilled by kicking off from the mother-wellbore,15.02.1990 Completed dateExploration wellbores from moveable facilities:
For floating facilities - date when anchor handling is started. For jackups - date the jacking-down started. Exploration wellbores from fixed facilities and all development wellbores:
Date when the wellbore is at total depth, and last casing, liner or screen is set. In case of immediate plugging of the wellbore, completed date equals the date the last plug i set in the wellbore.
Date when the wellbore is at total depth, and last casing, liner or screen is set. In case of immediate plugging of the wellbore, completed date equals the date the last plug i set in the wellbore.
Release dateDate when raw data which has been reported to the authorities from the wellbore is not confidential any longer. Normally 2 years after finishing the drilling. May be earlier if the area of the production license is relinquished.14.09.1992 Publication dateDate quality control of the wellbore information was completed, so it can be published on the internet as a 'Well Data Summary Sheet' wellbore with more information available than other wellbores.17.09.2007 Purpose - plannedPre-drill purpose of the wellbore. Legal values for exploration wellbores: WILDCAT, APPRAISAL, WILDCAT-CCS, APPRAISAL-CCS. Example of legal values for development wellbores: OBSERVATION, PRODUCTION, INJECTION.WILDCAT ReentryStatus whether the wellbore has been re-entered (YES) or not (NO). Re-entered wellbores are not included in the count when wellbores are presented in statistical overviews.NO ContentFor exploration wellbores, status of discovery.
DRY, SHOWS (trace amounts of hydrocarbons), GAS, GAS/CONDENSATE, OIL or OIL/GAS.
SHOWS (GAS SHOWS, OIL SHOWS or OIL/GAS SHOWS) are detected as fluorescent cut (organic extract), petroleum odour, or visual stain on cuttings or cores, or as increased gas reading on the mud-loggers gas detection equipment.
Legal values for WILDCAT-CCS and APPRAISAL-CCS: WATER
For development wellbores, type of produced/injected fluid.
WATER, CUTTINGS, NOT AVAILABLE, OIL, GAS/CONDENSATE, OIL/GAS, CO2, GAS, WATER/GAS, NOT APPLICABLE.SHOWS
Discovery wellboreIndicator which tells if the wellbore made a new discovery. Legal values: YES, NO. Prior to press-release or other information regarding drilling results, the indicator will be “NO” as a default.NO Kelly bushing elevation [m]Elevation of the rotary kelly bushing (RKB) above mean sea level.22.0 Water depth [m]Depth in metres betweem mean sea level and sea floor.70.0 Total depth (MD) [m RKB]Total measured length of wellbore from kelly bushing to total depth (driller's depth).5757.0 Final vertical depth (TVD) [m RKB]Vertical elevation from total depth to kelly bushing. Shown only for released wells. Referred to as true vertical depth (TVD).5337.4 Maximum inclination [°]Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.31.3 Bottom hole temperature [°C]Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.162 Oldest penetrated ageAge (according to Geologic Time Scale 2004 by F. M. Gradstein, et al. (2004)) of the oldest penetrated formation. May differ from age at TD for example in deviated wellbores. Examples of legal values: CRETACEOUS, EARLY CRETACEOUS, LATE JURASSIC, EARLY PERMIAN, EARLY TRIASSIC, EOCENE.TRIASSIC Oldest penetrated formationName of the oldest lithostratigraphic unit penetrated by the wellbore. Shown only for released wells. In most wellbores this is formation or group at total depth. May differ from formation or group at TD for example in wellbores drilled with high deviation or through faults. Examples of legal values: AMUNDSEN FM, BALDER FM, BASEMENT, BLODØKS FM, BRYNE FM, BURTON FM, COOK FM, DRAKE FM, DRAUPNE FM, EKOFISK FM, DUNLIN GP.SMITH BANK FM Geodetic datumReference system for coordinates. Example of legal values: ED50.ED50 NS degreesGeographic coordinate of the wellhead, north-south degrees.56° 13' 54.28'' N EW degreesGeographic coordinate of the wellhead, east-west degrees.3° 42' 16.63'' E NS UTM [m]Universal Transverse Mercator coordinate of the wellhead, north-south.6232233.96 EW UTM [m]Universal Transverse Mercator coordinate of the wellhead, east-west.543683.97 UTM zoneUniversal Transverse Mercator zone. Examples of legal values: 31, 32, 33, 34.31 NPDID wellboreNPD's unique id for the wellbore.1416
Wellbore historyGeneralWell 2/12-2 S is located just 400 m south-west of the 2/12-1 Freja discovery well. The Freja Discovery (named Mjølner up to 1998) lie in a complex faulted area in the North Sea between the Feda Graben to the west and the Gertrude Graben to the east, just north of the border from Danish sector. The reservoir is very deep, ca 4900 m, and the reservoir pressure is one of the highest on the Norwegian continental shelf. Well 2/12-2 S was designed to drill on segment E in the Freja Discovery. Segment E is separated from segment A by a major fault. It was not known if this fault is sealing or not. The main objective for the well was to test the mapped hydrocarbon in place in a Late Jurassic sand unit west of the 2/12-1 compartment. There was no secondary target level known at the time of planning. The well was designed for further use as an oil producer and/ or for extended/ long term testing. Shallow gas was predicted at 467 m and 534 m.Operations and resultsWell 2/12-2 S was spudded with the semi-submersible installation Mærsk Jutlander on 15 February 1990 and drilled to TD at 5757 m (5337 m TVD RKB) in rocks of Triassic age. A total of 73 days (34%) was counted as lost time in this well. It was drilled deviated from below the 30" casing shoe, with kick-off at 219 m. Drilling proceeded with only minor problems down to planned TD for the 17 1/2" section at 2790 m. When pulling out the string stuck at 2631 m. It was backed off at 2280 m, leaving a fish in the hole. The well was plugged back and sidetracked from 2102 m. Drilling commenced to 2800 m where the 13 3/8" casing was set. When drilling out cement in the top 12 1/4" section the pipe stuck again and eventually a second fish was left in the hole. A second technical sidetrack was performed with kick-off between 2602 and 2632 m. A third incident of stuck pipe occurred at 3585 m, but this time the pipe was freed and drilling could commence. After setting the 7" liner shoe at 5008 m a BOP test failed and the BOP stack was pulled for repair. The well was drilled with spud mud down to 1302 m, with KCl/polymer mud from 1302 m to 4681 m. After the pipe got stuck at 3585 m a pipe-lax solution was spotted and Magcolube was added. From 4681 m to TD the mud was changed to a high-temperature mud by adding pre-hydrated bentonite, Resinex, Polydrill, HTHP Desco, and Alcomer. No shallow gas was encounteredThe main target, an Intra-Haugesund Formation Sand, was encountered water bearing at 5525 m (5116 m TVD). Shows were observed in chalk, limestone and claystone in the Cretaceous. Good shows were seen in claystone, dolomite and sandstones of the Late Jurassic Tyne group from 4325 m to 5525 m. Below 4800 m the shows were only observed in dolomite stringers.One conventional core was cut in the interval 5530.0 to 5542.0 m with 76.5 % recovery. A total of 117 sidewall cores were attempted in five runs. Only 20 sidewall cores were recovered. Attempts were made to obtain RFT pressures in the Late Jurassic sand unit, but no formation pressure measurements were recorded, either due to seal failure or tight formation. No RFT fluid samples were taken. A maximum pore pressure gradient of 2.03 was is thought to occur between 5000 m (4608 m TVD) and 5150 m (4755 m TVD) based on maximum deflection of sonic log data.The well was suspended on 14 September 1990 as a dry well with shows.TestingNo drill stem test was performed.
Cuttings at the NPD
Cuttings at the NPDCuttings available for sampling?YES Cuttings at the NPDCutting sample, top depth [m]Cutting samples, bottom depth [m]1330.005720.00
Cores at the NPD
Cores at the NPDCore sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom15530.05539.2[m ] Cores at the NPDTotal core sample length [m]9.2 Cores at the NPDCores available for sampling?YES
Palynological slides at the NPD
Palynological slides at the NPDSample depthDepth unitSample typeLaboratory2310.0[m]DCRRI2340.0[m]DCRRI2370.0[m]DCRRI2400.0[m]DCRRI2430.0[m]DCRRI2490.0[m]DCRRI2520.0[m]DCRRI2580.0[m]DCRRI2610.0[m]DCRRI2670.0[m]DCRRI2700.0[m]DCRRI2730.0[m]DCRRI2760.0[m]DCRRI2790.0[m]DCRRI2820.0[m]DCRRI2850.0[m]DCRRI2880.0[m]DCRRI2910.0[m]DCRRI2940.0[m]DCRRI2970.0[m]DCRRI3000.0[m]DCRRI3030.0[m]DCRRI3060.0[m]DCRRI3090.0[m]DCRRI3120.0[m]DCRRI3150.0[m]DCRRI3180.0[m]DCRRI3210.0[m]DCRRI3250.0[m]DCRRI3285.0[m]DCRRI3315.0[m]DCRRI3340.0[m]DCRRI3370.0[m]DCRRI3400.0[m]DCRRI3435.0[m]DCRRI3460.0[m]DCRRI3490.0[m]DCRRI4220.0[m]DCRRI4245.0[m]DCRRI4250.0[m]DCRRI4255.0[m]DCRRI4260.0[m]DCRRI4270.0[m]DCRRI4275.0[m]DCRRI4280.0[m]DCRRI4285.0[m]DCRRI4290.0[m]DCRRI4295.0[m]DCRRI4300.0[m]DCRRI4312.0[m]DCRRI4372.0[m]DCRRI4402.0[m]DCRRI4432.0[m]DCRRI4470.0[m]DCRRI4620.0[m]DCRRI4647.0[m]DCRRI4680.0[m]DCRRI4710.0[m]DCRRI4740.0[m]DCRRI4760.0[m]DCRRI4790.0[m]DCRRI4820.0[m]DCRRI4850.0[m]DCRRI4880.0[m]DCRRI4950.0[m]DCRRI5020.0[m]DCRRI5037.0[m]DCRRI5697.0[m]DCRRI5757.0[m]DCRRI
LithostratigraphyTop depth [m]Lithostrat. unit9317303299329933133363341934293429344639104184418742154215423242534282432543254355517555375537
Composite logsDocument nameDocument formatDocument size [MB]0.80
Documents – reported by the production licence (period for duty of secrecy expired)
Documents – reported by the production licence (period for duty of secrecy expired)Document nameDocument formatDocument size [MB]26.15
LogsLog typeLog top depth [m]Log bottom depth [m]CBL VDL24002717CBL VDL40954993CBL VDL42903500CST GR48055010CST GR50175392CST GR50225527CST GR54085683CST GR54835527DIL SDT GR SP177744DIL SDT GR SP26025764FMS4 AMS43065765GYRO9004240LDL CNL GR AMS26023410LDL CNL GR AMS43065484LDL CNL NGL AMS53255764LDL GR AMS34284288MFC1004258MWD - GR RES DIR935010RFT AMS55025592VSP10005700
Casing and leak–off tests
Casing and leak–off testsCasing typeCasing diam.
[m]LOT/FIT mud eqv.
[g/cm3]Formation test typeCONDUCTOR30177.036180.00.00LOTINTERM.201295.0261300.01.76LOTINTERM.13 3/82751.017 1/22755.01.94LOTINTERM.9 5/84305.012 1/44310.02.17LOTLINER75008.08 1/25757.02.25LOT
Drilling mudDepth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured1011.20WATER BASED20.02.19901771.2017.020.0WATER BASED20.02.19901781.0017.020.0WATER BASED20.02.19901821.0017.020.0WATER BASED20.02.19904511.2026.061.0WATER BASED20.02.19907681.20WATER BASED21.02.199010941.2019.063.0WATER BASED22.02.199012961.2019.055.0WATER BASED23.02.199013121.2026.014.0WATER BASED05.03.199013201.2018.014.0WATER BASED06.03.199013201.2025.021.0WATER BASED26.02.199013201.2020.017.0WATER BASED26.02.199013201.2019.050.0WATER BASED26.02.199013201.2016.052.0WATER BASED27.02.199013201.2017.051.0WATER BASED28.02.199013201.2019.050.0WATER BASED01.03.199013201.2021.050.0WATER BASED02.03.199013971.2015.010.0WATER BASED08.03.199016991.5825.010.0WATER BASED12.03.199018901.5830.010.0WATER BASED13.03.199019751.5825.010.0WATER BASED13.03.199021021.6233.011.0WATER BASED20.03.199021021.6332.07.0WATER BASED20.03.199021051.5829.012.0WATER BASED13.03.199021071.6040.010.0WATER BASED20.03.199021231.5828.09.0WATER BASED16.03.199021261.5928.010.0WATER BASED20.03.199024591.5825.09.0WATER BASED21.03.199024671.5833.08.0WATER BASED13.03.199025401.5927.012.0WATER BASED22.03.199025581.8513.015.0WATER BASED13.09.199026071.6533.010.0WATER BASED03.05.199026511.6033.09.0WATER BASED23.03.199026571.5930.09.0WATER BASED26.03.199026821.6533.011.0WATER BASED04.05.199026981.6537.011.0WATER BASED10.05.199027501.5929.09.0WATER BASED26.03.199027811.53WATER BASED02.04.199027811.6225.08.0WATER BASED30.03.199027841.5528.012.0WATER BASED04.04.199027841.5528.012.0WATER BASED04.04.199027841.5328.05.0WATER BASED05.04.199027841.5330.014.0WATER BASED09.04.199027841.5329.013.0WATER BASED09.04.199027841.5330.014.0WATER BASED11.04.199027841.5329.014.0WATER BASED18.04.199027841.5336.013.0WATER BASED18.04.199027841.5331.015.0WATER BASED18.04.199027841.5332.09.0WATER BASED18.04.199027841.5334.08.0WATER BASED18.04.199027841.5325.07.0WATER BASED06.04.199027841.5332.015.0WATER BASED09.04.199027841.5330.014.0WATER BASED10.04.199027841.5331.013.0WATER BASED18.04.199027871.6538.010.0WATER BASED26.04.199027871.5330.014.0WATER BASED19.04.199027871.6534.015.0WATER BASED24.04.199027871.6538.014.0WATER BASED24.04.199027871.6538.012.0WATER BASED24.04.199027871.6533.09.0WATER BASED24.04.199027871.6534.09.0WATER BASED25.04.199027871.6533.010.0WATER BASED27.04.199027901.5833.08.0WATER BASED14.03.199027901.5831.010.0WATER BASED15.03.199028001.6223.09.0WATER BASED26.03.199028001.6230.09.0WATER BASED27.03.199028001.6227.08.0WATER BASED28.03.199028001.6228.08.0WATER BASED30.03.199029061.6534.015.0WATER BASED10.05.199031471.6531.012.0WATER BASED10.05.199033461.6533.012.0WATER BASED10.05.199034121.6536.08.0WATER BASED10.05.199034481.6535.010.0WATER BASED10.05.199034481.6531.010.0WATER BASED14.05.199034601.6533.09.0WATER BASED14.05.199034601.6530.011.0WATER BASED14.05.199034711.6537.011.0WATER BASED14.05.199034831.6535.011.0WATER BASED15.05.199035551.6538.011.0WATER BASED16.05.199035691.6538.013.0WATER BASED21.05.199035851.6843.012.0WATER BASED21.05.199035851.7035.013.0WATER BASED21.05.199035851.6633.013.0WATER BASED21.05.199035851.6628.016.0WATER BASED22.05.199036451.6635.010.0WATER BASED25.05.199036451.6634.010.0WATER BASED23.05.199036831.6634.09.0WATER BASED28.05.199037051.6632.09.0WATER BASED28.05.199037551.6637.010.0WATER BASED28.05.199038131.6537.012.0WATER BASED28.05.199038321.6538.013.0WATER BASED29.05.199039851.6540.012.0WATER BASED30.05.199040031.8522.02.0WATER BASED05.09.199040031.8518.02.0WATER BASED06.09.199040031.8518.02.0WATER BASED07.09.199040031.8513.04.0WATER BASED10.09.199040031.8514.04.0WATER BASED10.09.199040031.8534.014.0WATER BASED10.09.199040031.8524.014.0WATER BASED11.09.199041431.6538.010.0WATER BASED31.05.199041671.6637.011.0WATER BASED05.06.199042071.6638.012.0WATER BASED05.06.199042231.7539.012.0WATER BASED05.06.199042231.8040.012.0WATER BASED05.06.199042231.8040.013.0WATER BASED05.06.199042231.8041.012.0WATER BASED06.06.199042231.8042.012.0WATER BASED07.06.199042231.8042.012.0WATER BASED08.06.199042231.8041.013.0WATER BASED11.06.199042241.8039.012.0WATER BASED11.06.199042281.8039.012.0WATER BASED11.06.199042331.8041.011.0WATER BASED12.06.199042591.8041.012.0WATER BASED13.06.199042761.8037.012.0WATER BASED14.06.199042781.8038.013.0WATER BASED14.06.199043061.8041.012.0WATER BASED18.06.199043131.8038.011.0WATER BASED18.06.199043131.8029.010.0WATER BASED18.06.199043131.8032.08.0WATER BASED19.06.199043131.8032.08.0WATER BASED20.06.199043131.8032.08.0WATER BASED21.06.199043131.8031.09.0WATER BASED22.06.199043131.8031.09.0WATER BASED25.06.199043131.8024.08.0WATER BASED25.06.199043131.8026.09.0WATER BASED27.06.199043131.8127.07.0WATER BASED02.07.199043131.8031.08.0WATER BASED25.06.199043131.8024.07.0WATER BASED26.06.199043131.8030.08.0WATER BASED28.06.199043131.8027.07.0WATER BASED02.07.199043262.0229.08.0WATER BASED02.07.199043462.0229.08.0WATER BASED02.07.199044172.0627.012.0WATER BASED03.07.199044542.0823.010.0WATER BASED04.07.199044732.0829.05.0WATER BASED05.07.199044822.0823.06.0WATER BASED09.07.199045672.0823.09.0WATER BASED09.07.199045792.0823.06.0WATER BASED09.07.199046812.0825.06.0WATER BASED09.07.199047692.0822.07.0WATER BASED10.07.199047912.0823.06.0WATER BASED11.07.199048152.0723.06.0WATER BASED12.07.199048162.0821.07.0DUMMY13.07.199048632.0822.07.0DUMMY16.07.199049542.0826.07.0DUMMY16.07.199049602.0828.02.0WATER BASED04.09.199050102.0822.05.0WATER BASED06.08.199050102.0823.06.0DUMMY16.07.199050102.0824.06.0DUMMY17.07.199050102.0825.05.0DUMMY18.07.199050102.0820.03.0DUMMY19.07.199050102.0821.04.0DUMMY20.07.199050102.0820.03.0DUMMY23.07.199050102.0820.05.0DUMMY23.07.199050102.0820.05.0DUMMY23.07.199050102.0821.08.0DUMMY24.07.199050102.0822.07.0DUMMY25.07.199050102.0819.04.0WATER BASED27.07.199050102.0829.04.0WATER BASED30.07.199050102.0829.04.0WATER BASED30.07.199050102.0825.04.0WATER BASED30.07.199050102.0822.04.0WATER BASED31.07.199050102.0822.04.0WATER BASED01.08.199050102.0820.05.0WATER BASED02.08.199050102.0821.04.0WATER BASED03.08.199050102.0821.04.0WATER BASED06.08.199050102.0821.04.0WATER BASED06.08.199050352.0822.04.0WATER BASED09.08.199050562.0821.04.0WATER BASED10.08.199051512.0821.05.0WATER BASED13.08.199051852.0819.06.0WATER BASED13.08.199052102.0822.04.0WATER BASED13.08.199052232.0819.06.0WATER BASED14.08.199053252.0820.05.0WATER BASED15.08.199053342.0822.03.0WATER BASED27.08.199053902.0822.06.0WATER BASED16.08.199054872.0820.04.0WATER BASED17.08.199055012.0820.04.0WATER BASED20.08.199055012.0821.04.0WATER BASED20.08.199055012.0821.04.0WATER BASED20.08.199055012.0820.03.0WATER BASED21.08.199055302.0822.04.0WATER BASED22.08.199055422.0819.04.0WATER BASED23.08.199056172.0823.02.0WATER BASED27.08.199057032.0822.03.0WATER BASED27.08.199057572.0822.03.0WATER BASED29.08.199057572.0824.03.0WATER BASED29.08.199057572.0821.03.0WATER BASED31.08.199057572.0821.03.0WATER BASED03.09.199057572.0821.03.0WATER BASED03.09.199057572.0821.03.0WATER BASED03.09.1990