Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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21.11.2024 - 01:28
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7121/8-1

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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.
    7121/8-1
    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
    Press release
    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
    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.
    7121/8-1
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    ST05M09: Inline 1823. X-line 1607
    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.
    Statoil Petroleum AS
    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.
    1657-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.
    27
    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,
    22.05.2017
    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.
    15.07.2017
    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.
    20.06.2018
    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.
    01.04.2019
    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
    Reentry
    Status 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
    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.
    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.
    32.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    376.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2260.0
    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).
    2260.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    0.9
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    79
    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.
    SNADD FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    71° 25' 43.88'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    21° 38' 26.56'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7925563.16
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    522775.62
    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.
    8159

  • Wellbore history
    General
    Well 7121/8-1 was drilled to test the Blåmann prospect in the Hammerfest Basin of the Barents Sea. The primary objective was to test the hydrocarbon potential of the Jurassic Stø Formation, secondary to test the hydrocarbon potential of the Fruholmen/Snadd formations.
    Operations and results
    Wildcat well 7121/8-1 was spudded with the semi-submersible installation Songa Enabler on 22 May 2017 and drilled to TD at 2260 m in the Late Triassic Snadd Formation. Well was temporarily abandoned on 3 June 2017 after finishing the 12 1/4" section at 1781 m in the Knurr Formation. This was due to the legal dispute over the Cap-X technology. Partnership decided that the most efficient use of resources was to temporarily P&A the well and move to 7219/9-2 Kayak. After finishing Kayak the rig returned to Blåmann on 2 July and continued operations. Otherwise, operations proceeded without significant problems. The well was drilled with seawater and hi-vis pills down to 895 m and with Enviromul oil-based mud from 895 m to TD.
    Primary target Stø Formation was encountered at 1911 m. It was gas-bearing with the gas-water contact at 1934 m. The secondary targets proved to be dry. Shows on drilled cuttings are reported from 1928 m to 1984 m in the cored interval, and are described as spotted, dull fluorescence. Shows were also described in the interval from 2003 m to 2123 m, in the Nordmela, Tubåen and Fruholmen Formations, as spotty, dull, direct fluorescence with a slow, cloudy cut fluorescence. The shows descriptions are poor due to the masking effect by the oil-based mud.
    One core was cut from 1918 to 1984 m with 100% recovery in the Stø and Nordmela formations. The core-log depth shift is -1.4 m. MDT fluid samples were taken at 1911.4 m (gas) and 1936.6 m (water).
    The well was permanently abandoned on 15 July 2017 as a gas discovery.
    Testing
    No drill stem test was 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]
    980.00
    2260.00

  • 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
    1918.0
    1983.7
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    65.7
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    990.0
    [m]
    DC
    CGG
    1020.0
    [m]
    DC
    CGG
    1040.0
    [m]
    DC
    CGG
    1080.0
    [m]
    DC
    CGG
    1100.0
    [m]
    DC
    CGG
    1120.0
    [m]
    DC
    CGG
    1140.0
    [m]
    DC
    CGG
    1160.0
    [m]
    DC
    CGG
    1180.0
    [m]
    DC
    CGG
    1200.0
    [m]
    DC
    CGG
    1260.0
    [m]
    DC
    CGG
    1280.0
    [m]
    DC
    CGG
    1300.0
    [m]
    DC
    CGG
    1320.0
    [m]
    DC
    CGG
    1340.0
    [m]
    DC
    CGG
    1360.0
    [m]
    DC
    CGG
    1380.0
    [m]
    DC
    CGG
    1400.0
    [m]
    DC
    CGG
    1420.0
    [m]
    DC
    CGG
    1440.0
    [m]
    DC
    CGG
    1460.0
    [m]
    DC
    CGG
    1480.0
    [m]
    DC
    CGG
    1500.0
    [m]
    DC
    CGG
    1540.0
    [m]
    DC
    CGG
    1560.0
    [m]
    DC
    CGG
    1580.0
    [m]
    DC
    CGG
    1600.0
    [m]
    DC
    CGG
    1620.0
    [m]
    DC
    CGG
    1640.0
    [m]
    DC
    CGG
    1660.0
    [m]
    DC
    CGG
    1680.0
    [m]
    DC
    CGG
    1700.0
    [m]
    DC
    CGG
    1720.0
    [m]
    DC
    CGG
    1740.0
    [m]
    DC
    CGG
    1760.0
    [m]
    DC
    CGG
    1781.0
    [m]
    DC
    CGG
    1793.0
    [m]
    DC
    CGG
    1824.4
    [m]
    SWC
    CGG
    1829.0
    [m]
    DC
    CGG
    1835.0
    [m]
    DC
    CGG
    1839.2
    [m]
    SWC
    CGG
    1841.0
    [m]
    DC
    CGG
    1847.0
    [m]
    DC
    CGG
    1853.0
    [m]
    DC
    CGG
    1859.0
    [m]
    DC
    CGG
    1865.0
    [m]
    DC
    CGG
    1871.0
    [m]
    DC
    CGG
    1877.0
    [m]
    DC
    CGG
    1883.0
    [m]
    DC
    CGG
    1889.0
    [m]
    DC
    CGG
    1890.8
    [m]
    SWC
    CGG
    1895.0
    [m]
    DC
    CGG
    1901.0
    [m]
    DC
    CGG
    1907.0
    [m]
    DC
    CGG
    1908.0
    [m]
    SWC
    CGG
    1908.6
    [m]
    SWC
    CGG
    1913.0
    [m]
    DC
    CGG
    1918.9
    [m]
    C
    CGG
    1923.8
    [m]
    C
    CGG
    1929.8
    [m]
    C
    CGG
    1933.4
    [m]
    C
    CGG
    1939.7
    [m]
    C
    CGG
    1939.9
    [m]
    C
    CGG
    1940.8
    [m]
    C
    CGG
    1944.8
    [m]
    C
    CGG
    1949.6
    [m]
    C
    CGG
    1953.4
    [m]
    C
    CGG
    1960.3
    [m]
    C
    CGG
    1966.7
    [m]
    C
    CGG
    1968.1
    [m]
    C
    CGG
    1975.8
    [m]
    C
    CGG
    1977.4
    [m]
    C
    CGG
    1983.5
    [m]
    C
    CGG
    1991.0
    [m]
    DC
    CGG
    1997.0
    [m]
    DC
    CGG
    2003.0
    [m]
    DC
    CGG
    2005.6
    [m]
    SWC
    CGG
    2009.0
    [m]
    DC
    CGG
    2015.0
    [m]
    DC
    CGG
    2021.0
    [m]
    DC
    CGG
    2027.0
    [m]
    DC
    CGG
    2032.0
    [m]
    SWC
    CGG
    2033.0
    [m]
    DC
    CGG
    2039.0
    [m]
    DC
    CGG
    2042.3
    [m]
    SWC
    CGG
    2045.0
    [m]
    DC
    CGG
    2051.0
    [m]
    DC
    CGG
    2057.0
    [m]
    DC
    CGG
    2063.0
    [m]
    DC
    CGG
    2069.0
    [m]
    DC
    CGG
    2075.0
    [m]
    DC
    CGG
    2081.0
    [m]
    DC
    CGG
    2087.0
    [m]
    DC
    CGG
    2093.0
    [m]
    DC
    CGG
    2096.5
    [m]
    SWC
    CGG
    2099.0
    [m]
    DC
    CGG
    2105.0
    [m]
    DC
    CGG
    2111.0
    [m]
    DC
    CGG
    2117.0
    [m]
    DC
    CGG
    2123.0
    [m]
    DC
    CGG
    2129.0
    [m]
    DC
    CGG
    2135.0
    [m]
    DC
    CGG
    2141.0
    [m]
    DC
    CGG
    2147.0
    [m]
    DC
    CGG
    2153.0
    [m]
    DC
    CGG
    2159.0
    [m]
    DC
    CGG
    2165.0
    [m]
    DC
    CGG
    2171.0
    [m]
    DC
    CGG
    2177.0
    [m]
    DC
    CGG
    2183.0
    [m]
    DC
    CGG
    2189.0
    [m]
    DC
    CGG
    2195.0
    [m]
    DC
    CGG
    2201.0
    [m]
    DC
    CGG
    2207.0
    [m]
    DC
    CGG
    2213.0
    [m]
    DC
    CGG
    2219.0
    [m]
    DC
    CGG
    2223.3
    [m]
    SWC
    CGG
    2225.0
    [m]
    DC
    CGG
    2231.0
    [m]
    DC
    CGG
    2237.0
    [m]
    DC
    CGG
    2243.0
    [m]
    DC
    CGG
    2249.0
    [m]
    DC
    CGG
    2255.0
    [m]
    DC
    CGG
    2260.0
    [m]
    DC
    CGG

  • Lithostratigraphy

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    MDT GR
    1911
    2216
    MWD - GR RES DEN NEU SON DI
    977
    1781
    MWD - GR RES PWD DI
    1781
    2260
    MWD - GR RES SON DI
    408
    977
    XLR GR
    1816
    2223
    ZAIT MSIP PEX ECS
    1716
    2260

  • 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
    INTERM.
    13 5/8
    970.0
    17 1/2
    980.0
    1.48
    LOT
    LINER
    9 5/8
    1778.0
    12 1/2
    1781.0
    1.46
    LOT
    OPEN HOLE
    2260.0
    8 1/2
    2260.0
    0.00

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    407
    1.25
    31.0
    Enviromul
    966
    1.11
    23.0
    Enviromul
    1150
    1.14
    24.0
    Enviromul
    1658
    1.25
    29.0
    Enviromul
    1705
    1.22
    25.0
    Enviromul
    1711
    1.14
    20.0
    Enviromul
    1781
    1.25
    27.0
    Enviromul
    1781
    1.14
    20.0
    Enviromul
    1790
    1.25
    28.0
    Enviromul
    2259
    1.25
    28.0
    Enviromul