Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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26.11.2024 - 01:27
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7121/5-2

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  • General information
    General information
    Attribute Value
    Wellbore name
    Official name of wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    7121/5-2
    Type
    Wellbore type. Legal values: EXPLORATION, DEVELOPMENT, OTHER (see 'Purpose' for more information)
    EXPLORATION
    Purpose
    Final 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).
    WILDCAT
    Status
    Status 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 Norwegian Offshore Directorate.
    INJECTING: It was injected to the wellbore at the time of the operators last monthly report to the Norwegian Offshore Directorate.
    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&A
    Multilateral
    Indicator telling if the parent well is multilateral, meaning it has more than one branch radiating from the main borehole. Example of legal values: YES, NO. See also Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    NO
    Factmaps in new window
    Main area
    Name of the area on the Norwegian Continental Shelf where the wellbore is located. Legal values: BARENTS SEA, NORWEGIAN SEA, NORTH SEA.
    BARENTS SEA
    Field
    Name of the field the wellbore is related to.
    Discovery
    Name of the discovery the wellbore is related to.
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    7121/5-2
    Production licence
    Official designation of the production licence the wellbore was drilled or planned to be drilled from ( well head posistion).
    Drilling operator
    Name 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.
    Den norske stats oljeselskap a.s
    Drill permit
    The drilling permit number together with the version of the drilling permit as stated in the drilling permit granted by the Norwegian Offshore Directorate.
    516-L
    Drilling facility
    Norwegian Offshore Directorate's name of the facility which the wellbore was drilled from.
    Drilling days
    Number of days from wellbore entry to wellbore completion.
    42
    Entered date
    The date when he wellbore was spudded. For sidetracks: The date when new formation was drilled by kicking off from the mother-wellbore,
    26.05.1986
    Completed date
    Exploration 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.
    06.07.1986
    Release date
    Date 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.
    06.07.1988
    Publication date
    Date 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.
    05.01.2005
    Purpose - planned
    Pre-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
    Content
    For exploration wellbores, status of discovery.

    Legal values:
    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.
    Legal values:
    WATER, CUTTINGS, NOT AVAILABLE, OIL, GAS/CONDENSATE, OIL/GAS, CO2, GAS, WATER/GAS, NOT APPLICABLE.
    OIL/GAS
    Discovery wellbore
    Indicator 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.
    YES
    1st level with HC, age
    Age of lithostratigraphic unit, 1st level, where hydrocarbons were encountered. Examples of legal values: CRETACEOUS, EARLY CRETACEOUS, LATE JURASSIC, EOCENE. See also Norwegian Offshore Directorate bulletins.
    MIDDLE JURASSIC
    1st level with HC, formation
    Name of lithostartigraphic unit, 1st level, where hydrocarbons were encountered. Shown only for released wells. Examples of legal values: BASEMENT, COOK FM, EKOFISK FM, HEIMDAL FM, SANDNES FM, SOGNEFJORD FM, TARBERT FM, BRENT GP. See also Norwegian Offshore Directorate bulletins.
    STØ FM
    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.
    328.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2543.0
    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).
    2540.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    4.3
    Oldest penetrated age
    Age (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.
    LATE TRIASSIC
    Oldest penetrated formation
    Name 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.
    FRUHOLMEN FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    71° 40' 20.79'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    21° 39' 24.42'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7952737.91
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    523051.48
    UTM zone
    Universal Transverse Mercator zone. Examples of legal values: 31, 32, 33, 34.
    34
    NPDID wellbore
    Norwegian Offshore Directorate's unique id for the wellbore.
    907

  • Wellbore history
    General
    Well 7121/5-2 is located ca 10 km northeast of the Snøhvit Field. The purpose of the well was to test the hydrocarbon accumulation on the Beta-structure in sandstones of the Early to Middle Jurassic Stø-formation.
    Operations and results
    The well was spudded with the semi-submersible installation Ross Isle on 26 May 1986 and drilled to TD at 2543 m in Late Triassic sediments (Rhaetian age). The well was drilled with seawater and hi-vis pills down to 850 m, with gypsum/polymer mud from 850 m to 1977 m, and with gypsum/polymer/NaCl mud from 1977 m to TD.
    Hydrocarbon bearing Middle Jurassic sandstones in the Stø Formation were encountered at 2323 m. The gas-bearing zone extends from 2323 m to 2346 m. The gas zone is sealed from the underlying oil zone by a 6 m thick dense shale layer, which prevents the exact location of a gas/oil contact. The oil-bearing zone extends from 2352 m 2358.5 m. The oil water contact at 2358.5 m was picked both from logs and core data. Three cores were cut in the Stø formation (2324 m to 2400 m). A total of 9 FMT runs were performed; two to obtain pressure points and 7 to obtain segregated samples. The first run resulted in 32 pre test pressure points out of 38 attempts, in the interval 2323.5 m to 2369.0 m. Eighteen points were taken in the gas zone, 6 in the tight zone, 4 in the oil zone and 4 were in the water zone. The second run resulted in 9 pre test pressure points of nine attempts in the interval 2358 m to 2361 m. Seven attempts to obtain segregated samples resulted in 5 good samples, two at 2355 m, one at 2326 m, and two at 2353.5 m.
    The well was permanently abandoned on 6 June 1986 as an oil and gas discovery.
    Testing
    Due to the presence of hydrogen sulphide in the well, no tests were performed.

  • Cuttings at the Norwegian Offshore Directorate
    Cuttings at the Norwegian Offshore Directorate
    Cuttings available for sampling?
    YES
    Cuttings at the Norwegian Offshore Directorate
    Cutting sample, top depth [m]
    Cutting samples, bottom depth [m]
    460.00
    2539.00

  • Cores at the Norwegian Offshore Directorate
    Cores at the Norwegian Offshore Directorate
    Core sample number
    Core sample - top depth
    Core sample - bottom depth
    Core sample depth - uom
    1
    2324.0
    2342.8
    [m ]
    2
    2343.0
    2371.0
    [m ]
    3
    2371.0
    2399.0
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    74.8
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 2324-2330m
    Core photo at depth: 2330-2336m
    Core photo at depth: 2336-2342m
    Core photo at depth: 2341-2342m
    Core photo at depth: 2343-2349m
    2324-2330m
    2330-2336m
    2336-2342m
    2341-2342m
    2343-2349m
    Core photo at depth: 2349-2355m
    Core photo at depth: 2355-2361m
    Core photo at depth: 2361-2367m
    Core photo at depth: 2367-2371m
    Core photo at depth: 2371-2377m
    2349-2355m
    2355-2361m
    2361-2367m
    2367-2371m
    2371-2377m
    Core photo at depth: 2377-2383m
    Core photo at depth: 2383-2389m
    Core photo at depth: 2389-2395m
    Core photo at depth: 2395-2399m
    Core photo at depth:  
    2377-2383m
    2383-2389m
    2389-2395m
    2395-2399m

  • Casing and leak–off tests
    Casing and leak–off tests
    Casing type
    Casing diam.
    [inch]
    Casing depth
    [m]
    Hole diam.
    [inch]
    Hole depth
    [m]
    LOT/FIT mud eqv.
    [g/cm3]
    Formation test type
    CONDUCTOR
    30
    449.0
    36
    452.0
    0.00
    LOT
    SURF.COND.
    20
    829.0
    26
    1035.0
    1.53
    LOT
    INTERM.
    13 3/8
    1898.4
    17 1/2
    1977.0
    1.48
    LOT
    OPEN HOLE
    2543.0
    12 1/4
    2543.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    BHC AC CDL VDL GR
    344
    1898
    CDL CNL GR
    1897
    2544
    CDL GR
    829
    1939
    COREGUN
    1927
    2540
    DIFL BHC AC CDL GR SP CAL
    829
    1958
    DIFL BHC AC GR SP CAL
    1897
    2644
    DLL MLL GR
    2293
    2544
    FMT
    2323
    2369
    FMT
    2328
    2355
    HR DIP
    1897
    2540
    MWD - GR RES
    499
    1035
    RLL - GR RES
    2300
    2550

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.33

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    2.43

  • 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 name
    Document format
    Document size [MB]
    pdf
    21.23

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    390
    1.08
    WATER BASED
    26.05.1986
    453
    1.08
    WATER BASED
    26.05.1986
    453
    0.00
    800.0
    11.0
    WATERBASED
    05.06.1986
    524
    1.10
    600.0
    12.7
    WATER BASED
    05.06.1986
    848
    1.10
    600.0
    14.8
    WATER BASED
    05.06.1986
    1035
    1.10
    600.0
    13.5
    WATER BASED
    05.06.1986
    1035
    0.00
    800.0
    29.4
    WATERBASED
    05.06.1986
    1035
    1.08
    1000.0
    28.3
    WATER BASED
    05.06.1986
    1035
    1.10
    2400.0
    7.2
    WATER BASED
    08.06.1986
    1035
    1.08
    900.0
    28.8
    WATER BASED
    05.06.1986
    1169
    1.10
    2400.0
    8.0
    WATER BASED
    08.06.1986
    1415
    1.13
    2300.0
    9.3
    WATER BASED
    09.06.1986
    1580
    1.14
    2200.0
    10.1
    WATER BASED
    11.06.1986
    1754
    1.15
    2000.0
    9.7
    WATER BASED
    12.06.1986
    1874
    1.16
    2200.0
    9.3
    WATER BASED
    15.06.1986
    1977
    0.00
    2100.0
    8.0
    WATERBASED
    15.06.1986
    1977
    1.30
    2600.0
    8.4
    WATER BASED
    15.06.1986
    1977
    1.16
    2000.0
    9.3
    WATERBASED
    15.06.1986
    2060
    1.30
    2200.0
    7.2
    WATERBASED
    17.06.1986
    2135
    1.28
    1900.0
    7.2
    WATERBASED
    18.06.1986
    2217
    1.26
    1900.0
    6.3
    WATER BASED
    19.06.1986
    2293
    1.25
    1900.0
    5.1
    WATERBASED
    23.06.1986
    2324
    1.28
    2000.0
    5.5
    WATERBASED
    23.06.1986
    2363
    1.27
    1900.0
    5.9
    WATER BASED
    23.06.1986
    2399
    1.27
    1800.0
    5.9
    WATER BASED
    23.06.1986
    2431
    1.27
    1900.0
    6.3
    WATER BASED
    24.06.1986
    2470
    1.26
    2000.0
    6.3
    WATER BASED
    25.06.1986
    2484
    1.26
    2100.0
    6.5
    WATER BASED
    30.06.1986
    2507
    1.26
    2100.0
    6.5
    WATER BASED
    26.06.1986
    2507
    1.26
    2100.0
    6.5
    WATER BASED
    30.06.1986
    2543
    1.26
    2400.0
    7.6
    WATERBASED
    30.06.1986
    2543
    1.26
    2400.0
    7.8
    WATER BASED
    30.06.1986
    2543
    1.26
    2200.0
    7.8
    WATER BASED
    30.06.1986

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1504.0
    [m]
    DC
    GEARHA
    1516.0
    [m]
    DC
    GEARHA
    1534.0
    [m]
    DC
    GEARHA
    1540.0
    [m]
    DC
    GEARHA
    1552.0
    [m]
    DC
    GEARHA
    1564.0
    [m]
    DC
    GEARHA
    1576.0
    [m]
    DC
    GEARHA
    1588.0
    [m]
    DC
    GEARHA
    1600.0
    [m]
    DC
    GEARHA
    1612.0
    [m]
    DC
    GEARHA
    1624.0
    [m]
    DC
    GEARHA
    1636.0
    [m]
    DC
    GEARHA
    1648.0
    [m]
    DC
    GEARHA
    1660.0
    [m]
    DC
    GEARHA
    1672.0
    [m]
    DC
    GEARHA
    1684.0
    [m]
    DC
    GEARHA
    1696.0
    [m]
    DC
    GEARHA
    1708.0
    [m]
    DC
    GEARHA
    1720.0
    [m]
    DC
    GEARHA
    1735.0
    [m]
    DC
    GEARHA
    1744.0
    [m]
    DC
    GEARHA
    1756.0
    [m]
    DC
    GEARHA
    1768.0
    [m]
    DC
    GEARHA
    1780.0
    [m]
    DC
    GEARHA
    1792.0
    [m]
    DC
    GEARHA
    1804.0
    [m]
    DC
    GEARHA
    1816.0
    [m]
    DC
    GEARHA
    1828.0
    [m]
    DC
    GEARHA
    1840.0
    [m]
    DC
    GEARHA
    1852.0
    [m]
    DC
    GEARHA
    1864.0
    [m]
    DC
    GEARHA
    1876.0
    [m]
    DC
    GEARHA
    1888.0
    [m]
    DC
    GEARHA
    1900.0
    [m]
    DC
    GEARHA
    1912.0
    [m]
    DC
    GEARHA
    1924.0
    [m]
    DC
    GEARHA
    1927.5
    [m]
    SWC
    GEARHA
    1936.0
    [m]
    DC
    GEARHA
    1951.0
    [m]
    DC
    GEARHA
    1963.0
    [m]
    DC
    GEARHA
    1972.0
    [m]
    DC
    GEARHA
    1982.0
    [m]
    SWC
    STATOIL
    1984.0
    [m]
    DC
    GEARHA
    1996.0
    [m]
    DC
    GEARHA
    2008.0
    [m]
    DC
    GEARHA
    2020.0
    [m]
    DC
    GEARHA
    2032.0
    [m]
    DC
    GEARHA
    2044.0
    [m]
    DC
    GEARHA
    2054.0
    [m]
    SWC
    STATOIL
    2056.0
    [m]
    DC
    GEARHA
    2062.0
    [m]
    SWC
    GEARHA
    2062.0
    [m]
    SWC
    STATOIL
    2068.0
    [m]
    DC
    GEARHA
    2080.0
    [m]
    DC
    GEARHA
    2080.0
    [m]
    SWC
    STATOIL
    2092.0
    [m]
    DC
    GEARHA
    2104.0
    [m]
    DC
    GEARHA
    2116.0
    [m]
    DC
    GEARHA
    2121.0
    [m]
    SWC
    STATOIL
    2128.0
    [m]
    DC
    GEARHA
    2140.0
    [m]
    DC
    GEARHA
    2152.0
    [m]
    DC
    GEARHA
    2164.0
    [m]
    DC
    GEARHA
    2168.0
    [m]
    SWC
    GEARHA
    2168.0
    [m]
    SWC
    STATOIL
    2175.0
    [m]
    SWC
    GEARHA
    2176.0
    [m]
    DC
    GEARHA
    2178.0
    [m]
    SWC
    GEARHA
    2178.0
    [m]
    DC
    STATOIL
    2184.0
    [m]
    SWC
    GEARHA
    2187.0
    [m]
    SWC
    GEARHA
    2187.0
    [m]
    SWC
    STATOIL
    2188.0
    [m]
    DC
    GEARHA
    2195.0
    [m]
    SWC
    GEARHA
    2200.0
    [m]
    DC
    GEARHA
    2207.0
    [m]
    SWC
    GEARHA
    2207.0
    [m]
    SWC
    STATOIL
    2212.0
    [m]
    DC
    GEARHA
    2220.5
    [m]
    SWC
    STATOIL
    2224.0
    [m]
    DC
    GEARHA
    2236.0
    [m]
    DC
    GEARHA
    2248.0
    [m]
    DC
    GEARHA
    2249.0
    [m]
    SWC
    GEARHA
    2260.0
    [m]
    DC
    GEARHA
    2264.5
    [m]
    SWC
    GEARHA
    2272.0
    [m]
    DC
    GEARHA
    2284.0
    [m]
    DC
    GEARHA
    2286.0
    [m]
    SWC
    GEARHA
    2296.0
    [m]
    DC
    GEARHA
    2303.0
    [m]
    SWC
    GEARHA
    2308.0
    [m]
    DC
    GEARHA
    2312.5
    [m]
    SWC
    GEARHA
    2320.0
    [m]
    DC
    GEARHA
    2321.0
    [m]
    SWC
    GEARHA
    2324.5
    [m]
    C
    GEARHA
    2328.6
    [m]
    C
    GEARHA
    2332.0
    [m]
    DC
    GEARHA
    2339.9
    [m]
    C
    GEARHA
    2344.0
    [m]
    DC
    GEARHA
    2344.0
    [m]
    DC
    GEARHA
    2344.8
    [m]
    C
    GEARHA
    2350.4
    [m]
    C
    GEARHA
    2356.0
    [m]
    DC
    GEARHA
    2363.0
    [m]
    C
    GEARHA
    2368.0
    [m]
    DC
    GEARHA
    2375.1
    [m]
    C
    GEARHA
    2380.0
    [m]
    DC
    GEARHA
    2382.7
    [m]
    C
    GEARHA
    2397.0
    [m]
    C
    GEARHA
    2398.7
    [m]
    C
    GEARHA
    2404.0
    [m]
    DC
    GEARHA
    2416.0
    [m]
    DC
    GEARHA
    2425.0
    [m]
    DC
    GEARHA
    2432.0
    [m]
    SWC
    GEARHA
    2440.0
    [m]
    DC
    GEARHA
    2446.0
    [m]
    DC
    GEARHA
    2449.0
    [m]
    SWC
    GEARHA
    2452.0
    [m]
    DC
    GEARHA
    2460.0
    [m]
    SWC
    GEARHA
    2461.0
    [m]
    DC
    GEARHA
    2475.0
    [m]
    DC
    GEARHA
    2480.0
    [m]
    DC
    GEARHA
    2488.0
    [m]
    DC
    GEARHA
    2500.0
    [m]
    DC
    GEARHA
    2503.5
    [m]
    SWC
    GEARHA
    2512.0
    [m]
    DC
    GEARHA
    2519.0
    [m]
    SWC
    GEARHA
    2524.0
    [m]
    DC
    GEARHA
    2528.0
    [m]
    DC
    GEARHA
    2534.0
    [m]
    SWC
    GEARHA
    2539.0
    [m]
    DC
    GEARHA