Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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25.11.2024 - 01:30
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25/1-9

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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.
    25/1-9
    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).
    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
    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
    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.
    25/1-9
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    NH 8603 - 405 SP. 175
    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.
    Norsk Hydro Produksjon 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.
    528-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.
    33
    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,
    09.09.1986
    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.
    12.10.1986
    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.
    12.10.1988
    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.
    27.02.2004
    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.
    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.
    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.
    23.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    112.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2807.0
    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).
    2807.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    2.8
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    88
    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 CRETACEOUS
    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.
    JORSALFARE FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    59° 50' 13.34'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 13' 30.24'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6633671.53
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    456562.10
    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.
    1001

  • Wellbore history
    General
    Well 25/1-9 was drilled nearby and south of the Frigg structure close to the UK boarder, and was designed to prove possible hydrocarbon accumulation in the Frigg Formation and "Cod" sandstone (Intra Balder Formation Sandstone). A main objective was to verify the seismo-stratigraphic interpretation in block 25/1. In addition, the well was expected to obtain valuable data input to the Frigg Field reservoir simulation study. The prognosed depth was 2813 m, 50 m into the Shetland Group.
    Operations and results
    Wildcat well 25/1-9 was spudded with Wi1h. Wi1helmsen installation Treasure Scout 9 September 1996 and drilled to TD at 2807 m in the Late Cretaceous Hardråde Formation. Drilling proceeded without significant problems. The well was drilled with seawater and hi-vis pills down to 990 m, with KCl/polymer mud from 990 m to 1965 m, and with PAC/polymer/seawater from 1965 m to TD
    The Frigg Formation was encountered at 2035 m. It consisted of very fine to fine, hard sandstones with poor reservoir characteristics down to 2051 m. From 2051 m to 2199 m the lithology was predominantly massive sandstone with excellent reservoir characteristics. Occasional stringers of claystone and what was interpreted as concretions of calcite-cemented sandstone occurred throughout the section. The lower part, from 2196 m to 2237 m was claystone with a3 m conglomerate at the base.
    Hydrocarbons were encountered in the Frigg Formation with 2.6 m net pay of gas down to 2054 m and 6.9 m net pay oil down to a free water level at 2063 m. RFT pressure measurements gave an oil gradient corresponding to a fluid density of 0.81 g/cm3. Pore pressure indicated pressure depletion due to production from the Frigg Field. RFT data indicated that the Frigg Formation contains small reserves and the discovery was considered uneconomic.
    The gas/oil contact was defined at 2054 m, and the oil/water contact at 2063 m. Only very weak shows were recorded in the underlying water zone and Intra Balder Formation Sandstone. Two segregated fluid samples were taken, one in the gas zone and one in the oil zone. Four cores were cut in the interval 2048 - 2111 m, and one core was cut in the interval 2234 - 2256 m. The Frigg Formation came in at 2035 m as prognosed. The well was permanently abandoned as an oil and gas discovery 12 October 1986.
    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]
    1000.00
    2807.00

  • 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
    2048.0
    2049.2
    [m ]
    2
    2049.5
    2068.0
    [m ]
    3
    2068.0
    2087.2
    [m ]
    4
    2088.5
    2107.0
    [m ]
    5
    2234.0
    2255.0
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    78.4
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 2048-2049m
    Core photo at depth: 2049-2053m
    Core photo at depth: 2054-2058m
    Core photo at depth: 2059-2063m
    Core photo at depth: 2064-2067m
    2048-2049m
    2049-2053m
    2054-2058m
    2059-2063m
    2064-2067m
    Core photo at depth: 2068-2072m
    Core photo at depth: 2073-2077m
    Core photo at depth: 2078-2082m
    Core photo at depth: 2083-2087m
    Core photo at depth: 2088-2092m
    2068-2072m
    2073-2077m
    2078-2082m
    2083-2087m
    2088-2092m
    Core photo at depth: 2093-2097m
    Core photo at depth: 2098-2102m
    Core photo at depth: 2103-2107m
    Core photo at depth: 2234-2238m
    Core photo at depth: 2239-2243m
    2093-2097m
    2098-2102m
    2103-2107m
    2234-2238m
    2239-2243m
    Core photo at depth: 2244-2248m
    Core photo at depth: 2249-2253m
    Core photo at depth: 2254-2255m
    Core photo at depth:  
    Core photo at depth:  
    2244-2248m
    2249-2253m
    2254-2255m

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    2055.0
    [m]
    C
    R.R.I
    2076.0
    [m]
    C
    R.R.I
    2090.0
    [m]
    C
    R.R.I
    2200.0
    [m]
    SWC
    R.R.I
    2216.0
    [m]
    SWC
    R.R.I
    2232.0
    [m]
    SWC
    R.R.I
    2235.0
    [m]
    C
    R.R.I
    2240.0
    [m]
    C
    R.R.I
    2253.0
    [m]
    C
    R.R.I
    2254.0
    [m]
    C
    R.R.I
    2261.0
    [m]
    SWC
    R.R.I
    2287.0
    [m]
    SWC
    R.R.I
    2334.0
    [m]
    SWC
    R.R.I
    2340.5
    [m]
    SWC
    R.R.I
    2347.0
    [m]
    SWC
    R.R.I
    2369.5
    [m]
    SWC
    R.R.I
    2377.0
    [m]
    SWC
    R.R.I
    2385.0
    [m]
    SWC
    R.R.I
    2393.5
    [m]
    SWC
    R.R.I
    2407.5
    [m]
    SWC
    R.R.I
    2416.0
    [m]
    SWC
    R.R.I
    2427.0
    [m]
    SWC
    R.R.I
    2443.0
    [m]
    SWC
    R.R.I

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.36

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    0.51

  • 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
    13.25

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL VDL
    865
    1947
    CST
    1968
    2764
    CST
    1968
    2347
    DIL LSS GR SP
    975
    1915
    DIL LSS GR SP
    1947
    2776
    DIL LSS SP GR
    1947
    2749
    DLL MSFL NSG SP GR
    2025
    2300
    LDL CNL GR CAL
    1947
    2756
    LDL GR CAL
    975
    1915
    MWD - GR RES DIR
    135
    2807
    NGS
    2025
    2300
    RFT
    2052
    2056
    RFT
    2052
    2736
    RFT
    2054
    2547
    SHDT
    1947
    2757
    VSP
    1000
    2780

  • 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
    221.0
    36
    221.0
    0.00
    LOT
    SURF.COND.
    20
    974.0
    26
    990.0
    1.33
    LOT
    INTERM.
    13 3/8
    1947.0
    17 1/2
    1965.0
    1.74
    LOT
    OPEN HOLE
    2807.0
    12 1/4
    2807.0
    0.00
    LOT

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    170
    1.03
    WATER
    14.10.1986
    221
    1.15
    WATER
    09.09.1986
    453
    1.15
    WATER
    10.09.1986
    621
    1.03
    WATER
    14.09.1986
    990
    0.00
    WATER
    14.09.1986
    990
    0.00
    14.0
    7.0
    WATER
    15.09.1986
    990
    1.15
    WATER
    11.09.1986
    1034
    1.13
    10.0
    7.0
    WATER
    16.09.1986
    1300
    1.15
    14.0
    11.0
    WATER
    17.09.1986
    1715
    1.16
    13.0
    10.0
    WATER
    18.09.1986
    1797
    1.09
    16.0
    9.0
    WATER
    09.10.1986
    1940
    1.16
    12.0
    10.0
    WATER
    21.09.1986
    1965
    1.20
    14.0
    8.0
    WATER
    21.09.1986
    1965
    0.00
    14.0
    10.0
    WATER
    21.09.1986
    1965
    0.00
    14.0
    10.0
    WATER
    22.09.1986
    1974
    1.08
    10.0
    9.0
    WATER
    23.09.1986
    2050
    1.08
    13.0
    10.0
    WATER
    24.09.1986
    2089
    1.08
    15.0
    8.0
    WATER
    25.09.1986
    2111
    1.08
    14.0
    9.0
    WATER
    28.09.1986
    2234
    1.08
    17.0
    13.0
    WATER
    28.09.1986
    2244
    1.08
    18.0
    13.0
    WATER
    28.09.1986
    2319
    1.08
    18.0
    12.0
    WATER
    29.09.1986
    2511
    1.08
    18.0
    14.0
    WATER
    30.09.1986
    2602
    1.09
    18.0
    14.0
    WATER
    01.10.1986
    2702
    1.09
    18.0
    12.0
    WATER
    02.10.1986
    2723
    1.09
    17.0
    11.0
    WATER
    05.10.1986
    2807
    1.08
    19.0
    13.0
    WATER
    05.10.1986
    2807
    0.00
    19.0
    12.0
    WATER
    05.10.1986
    2807
    0.00
    16.0
    11.0
    WATER
    07.10.1986
    2807
    0.00
    15.0
    11.0
    WATER
    08.10.1986
    2807
    0.00
    16.0
    12.0
    WATER
    06.10.1986

  • 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
    0.22