Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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23.07.2024 - 01:26
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25/2-9

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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.
    25/2-9
    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).
    APPRAISAL
    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
    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.
    NORTH 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.
    25/2-9
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    EL 8403 - 410 SP. 270
    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.
    Elf Petroleum Norge 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.
    470-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.
    40
    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,
    15.06.1985
    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.
    24.07.1985
    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.
    24.07.1987
    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.
    17.12.2003
    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.
    APPRAISAL
    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.
    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.
    NO
    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.
    EOCENE
    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.
    FRIGG FM
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    25.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    112.5
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2297.0
    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).
    2297.0
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    57
    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.
    EOCENE
    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.
    BALDER FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    59° 53' 10.16'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 22' 15.09'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6639054.92
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    464786.03
    UTM zone
    Universal Transverse Mercator zone. Examples of legal values: 31, 32, 33, 34.
    31
    NPDID wellbore
    Norwegian Offshore Directorate's unique id for the wellbore.
    477
  • Wellbore history

    General
    Well 25/2-9 was designed to drill an assumed top in the eastern part of the Frigg East Beta structure, one of the Frigg Satellites, discovered by well 25/2-1 in 1973. The main objects of this well was to reveal petrophysical characteristics in an area where development wells could be located, to appraise the gas column height and gas in place, to get static formation pressure in order to estimate communication with the main Frigg field, and to obtain cores from the upper part of the Frigg Formation and the Balder formation for static and dynamic petrophysical measurements. Prognosed depth of the Frigg Formation was 1922 m, and planned TD was 2450 m.
    Operations and results
    Appraisal well 25/2-9 was spudded with Golar Nor Offshore A/S semi-submersibel rig Nortrym on 14 June 1985 and completed 24 July 1985 at a depth of 2297 m in the Paleocene Balder Formation. At 2297 m 800 l/min of mud was lost due to a leakage between 13 3/4" casing and 20" casing. The 9 5/8" casing was set to 888 m and the well was gradually brought under control. During this operation a part of the under-reamer was lost into the hole, and fishing went on for two days.
    Top Frigg came in at 1935 m with hydrocarbons from 1935.9 m. Gas/oil contact was encountered at 1960 m, and an oil/water contact at 1972 m with brown oil stain on cuttings down to 2008 m. A total of 12 cores were cut with a total length of 214.25 m with 86% recovery. Ten cores were cut from 1939 m to 2145 m in the upper Frigg Formation, across the hydrocarbon bearing zone and all fluid contacts and two cores were cut from 2220 m to 2256 m in the tuffaceous Balder Formation. The cores consisted mainly of sands, more or less consolidated.
    The well was plugged and abandoned as an oil and 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]
    200.00
    2292.00
  • 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
    1939.4
    1957.0
    [m ]
    2
    1959.6
    1985.0
    [m ]
    3
    1987.6
    2013.0
    [m ]
    4
    2015.3
    2033.0
    [m ]
    5
    2034.0
    2036.8
    [m ]
    6
    2060.8
    2074.0
    [m ]
    8
    2080.0
    2103.3
    [m ]
    9
    2107.0
    2117.9
    [m ]
    11
    2220.0
    2236.9
    [m ]
    12
    2238.2
    2255.0
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    170.1
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES
  • Core photos

    Core photos
    Core photo at depth: 1939-1942m
    Core photo at depth: 1942-1945m
    Core photo at depth: 1945-1951m
    Core photo at depth: 1946-1948m
    Core photo at depth: 1955-1952m
    1939-1942m
    1942-1945m
    1945-1951m
    1946-1948m
    1955-1952m
    Core photo at depth: 1952-1955m
    Core photo at depth: 1955-1957m
    Core photo at depth: 1959-1963m
    Core photo at depth: 1962-1967m
    Core photo at depth: 1963-1966m
    1952-1955m
    1955-1957m
    1959-1963m
    1962-1967m
    1963-1966m
    Core photo at depth: 1969-1971m
    Core photo at depth: 1971-1974m
    Core photo at depth: 1974-1978m
    Core photo at depth: 1978-1981m
    Core photo at depth: 1981-1984m
    1969-1971m
    1971-1974m
    1974-1978m
    1978-1981m
    1981-1984m
    Core photo at depth: 1985-1986m
    Core photo at depth: 1987-1990m
    Core photo at depth: 1990-1993m
    Core photo at depth: 1994-1997m
    Core photo at depth: 1997-2000m
    1985-1986m
    1987-1990m
    1990-1993m
    1994-1997m
    1997-2000m
    Core photo at depth: 2004-2007m
    Core photo at depth: 2007-2009m
    Core photo at depth: 2010-2012m
    Core photo at depth: 2015-2021m
    Core photo at depth: 2016-2019m
    2004-2007m
    2007-2009m
    2010-2012m
    2015-2021m
    2016-2019m
    Core photo at depth: 2022-2025m
    Core photo at depth: 2025-2028m
    Core photo at depth: 2028-2031m
    Core photo at depth: 2031-2032m
    Core photo at depth: 2033-2034m
    2022-2025m
    2025-2028m
    2028-2031m
    2031-2032m
    2033-2034m
    Core photo at depth: 2034-2036m
    Core photo at depth: 2060-2063m
    Core photo at depth: 2063-2067m
    Core photo at depth: 2067-2070m
    Core photo at depth: 2070-2073m
    2034-2036m
    2060-2063m
    2063-2067m
    2067-2070m
    2070-2073m
    Core photo at depth: 2074-2074m
    Core photo at depth: 2080-2083m
    Core photo at depth: 2083-2089m
    Core photo at depth: 2084-2091m
    Core photo at depth: 2089-2094m
    2074-2074m
    2080-2083m
    2083-2089m
    2084-2091m
    2089-2094m
    Core photo at depth: 2093-2101m
    Core photo at depth: 2097-2100m
    Core photo at depth: 2100-2104m
    Core photo at depth: 2102-2103m
    Core photo at depth: 2107-2119m
    2093-2101m
    2097-2100m
    2100-2104m
    2102-2103m
    2107-2119m
    Core photo at depth: 2111-2115m
    Core photo at depth: 2115-2117m
    Core photo at depth: 2143-2144m
    Core photo at depth: 2220-2224m
    Core photo at depth: 2224-2227m
    2111-2115m
    2115-2117m
    2143-2144m
    2220-2224m
    2224-2227m
    Core photo at depth: 2228-2232m
    Core photo at depth: 2232-2236m
    Core photo at depth: 2238-2242m
    Core photo at depth: 2242-2246m
    Core photo at depth: 2246-2250m
    2228-2232m
    2232-2236m
    2238-2242m
    2242-2246m
    2246-2250m
    Core photo at depth: 2250-2254m
    Core photo at depth: 2255-2256m
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    2250-2254m
    2255-2256m
  • Lithostratigraphy

  • Composite logs

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

    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL VDT
    135
    887
    CST
    0
    0
    DISFL LSSS GR
    197
    2295
    HDT
    1880
    2296
    LDT CNL GR AMS
    197
    2294
    RFT
    0
    0
    SHDT
    1800
    2296
    VSP
    197
    2295
  • 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
    197.0
    36
    202.0
    0.00
    LOT
    INTERM.
    13 3/8
    987.0
    17 1/2
    1002.0
    1.37
    LOT
    INTERM.
    9 5/8
    2297.0
    12 1/4
    2297.0
    0.00
    LOT
  • Drilling mud

    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    198
    1.06
    WATER BASED
    17.06.1985
    202
    1.05
    WATER BASED
    17.06.1985
    602
    1.06
    WATER BASED
    18.06.1985
    908
    1.10
    28.0
    11.0
    WATER BASED
    18.06.1985
    1002
    1.19
    28.0
    20.0
    WATER BASED
    21.06.1985
    1002
    1.10
    28.0
    19.0
    WATER BASED
    21.06.1985
    1002
    1.19
    28.0
    20.0
    WATER BASED
    21.06.1985
    1010
    1.06
    32.0
    8.0
    WATER BASED
    24.06.1985
    1300
    1.16
    38.0
    10.0
    WATER BASED
    24.06.1985
    1525
    1.19
    38.0
    11.0
    WATER BASED
    25.06.1985
    1783
    1.20
    40.0
    12.0
    WATER BASED
    26.06.1985
    1933
    1.23
    34.0
    8.0
    WATER BASED
    26.06.1985
    1946
    1.24
    31.0
    8.0
    WATER BASED
    27.06.1985
    1987
    1.24
    30.0
    7.0
    WATER BASED
    28.06.1985
    2034
    1.26
    32.0
    7.0
    WATER BASED
    01.07.1985
    2034
    1.26
    32.0
    7.0
    WATER BASED
    28.06.1985
    2034
    1.26
    32.0
    7.0
    WATER BASED
    01.07.1985
    2060
    1.26
    31.0
    6.0
    WATER BASED
    01.07.1985
    2075
    1.26
    33.0
    7.0
    WATER BASED
    02.07.1985
    2076
    1.26
    35.0
    10.0
    WATER BASED
    04.07.1985
    2107
    1.27
    41.0
    10.5
    WATER BASED
    08.07.1985
    2120
    1.27
    38.0
    12.5
    WATER BASED
    08.07.1985
    2145
    1.27
    41.0
    13.5
    WATER BASED
    08.07.1985
    2227
    1.27
    40.0
    13.0
    WATER BASED
    08.07.1985
    2256
    1.27
    41.0
    11.0
    WATER BASED
    09.07.1985
    2297
    1.27
    38.0
    11.0
    WATER BASED
    10.07.1985
    2297
    1.27
    36.0
    9.0
    WATER BASED
    14.07.1985
    2297
    1.28
    35.0
    8.0
    WATER BASED
    16.07.1985
    2297
    1.29
    36.0
    8.0
    WATER BASED
    16.07.1985
    2297
    1.29
    44.0
    8.0
    WATER BASED
    17.07.1985
    2297
    1.30
    50.0
    12.0
    WATER BASED
    20.07.1985
    2297
    1.27
    36.0
    9.0
    WATER BASED
    14.07.1985
    2297
    1.28
    35.0
    8.0
    WATER BASED
    16.07.1985
    2297
    1.29
    36.0
    8.0
    WATER BASED
    16.07.1985
    2297
    1.29
    44.0
    8.0
    WATER BASED
    17.07.1985
    2297
    1.30
    50.0
    12.0
    WATER BASED
    20.07.1985
  • Pressure plots

    Pressure plots
    The pore pressure data is sourced from well logs if no other source is specified. In some wells where pore pressure logs do not exist, information from Drill stem tests and kicks have been used. The data has been reported to the NPD, and further processed and quality controlled by IHS Markit.
    Pressure plots
    Document name
    Document format
    Document size [MB]
    pdf
    0.21