Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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22.12.2024 - 01:25
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6507/12-3

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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.
    6507/12-3
    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
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    Main area
    Name of the area on the Norwegian Continental Shelf where the wellbore is located. Legal values: BARENTS SEA, NORWEGIAN SEA, NORTH SEA.
    NORWEGIAN SEA
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    6507/12-3
    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.
    Saga Petroleum ASA
    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.
    481-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.
    29
    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,
    16.08.1985
    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.
    13.09.1985
    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.
    13.09.1987
    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.
    08.03.2004
    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
    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.
    DRY
    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
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    26.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    240.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2600.0
    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).
    2600.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    1
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    80
    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.
    EARLY JURASSIC
    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.
    ÅRE FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    65° 3' 35.82'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    7° 49' 6.4'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7215836.28
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    444406.39
    UTM zone
    Universal Transverse Mercator zone. Examples of legal values: 31, 32, 33, 34.
    32
    NPDID wellbore
    Norwegian Offshore Directorate's unique id for the wellbore.
    485

  • Wellbore history
    General
    Wildcat well 6507/12-3 was drilled east of and near to the Midgard field on Haltenbanken. The main objective was to test the W-1 prospect located on the western margin of the Trøndelag Platform, on the eastern edge of the Ellingråsa Graben. The structure was seen as a domed N-S striking horst restricted by the main platform fault to the west and a related antithetic fault to the east with throws of approximately 350 m and 100 m, respectively. Primary target was the Middle Jurassic sandstones of the Fangst Group. A secondary target was the Lower Jurassic sandstones of the Tilje Formation, and to penetrate the coal horizon in the Åre Formation. Proposed TD was at 2700 m.
    Operations and results
    Well 6507/12-3 was spudded with Wi1h. Wi1helmsen semi-submersible installation Treasure Saga on 16 August 1985 and drilled to TD at 2600 m in the Early Jurassic Åre Formation. The well was drilled with spud mud down to 380 m, with gel mud from 380 m to 920 m, with Gypsum / Polymer mud from 920 m to 1949 m, and with a gel mud again from 1949 m to TD. A gas flow occurred between the 20" and 30" casing. The casing was perforated at 705 m and cement successfully squeezed. Gas flow continued to be a problem and the 13 3/8" casing was also perforated and cement squeeze was performed in both the lower and upper perforations.
    The Quaternary/Tertiary Sequence was 1596 m thick and consisted predominantly of marine claystones. Cretaceous was represented by a 75 m sequence of Springar Formation. Two metre of Spekk Formation was encountered at 1937 m, followed by 33 m of Melke Formation. The Fangst Group was penetrated at 1974 m, 20 m above the prognosed depth. MWD displayed fall in resistivity and the formation was considered dry. All Jurassic sandstone sequences were water bearing. A number of gas peaks were recorded from 474 m to 804 m, but there were no oil shows observed in the well.
    Two cores were attempted in the interval 1981 m to 2016 m in the Garn Formation, but only the 1981 to 1988.5 m interval of the first was recovered. A third core was cut for source rock studies in the interval 2503.5 m to 2521.5 m in the Åre Formation. The well was permanently abandoned on 13 September 1985 as a dry well.
    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]
    390.00
    2600.00

  • 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
    1981.0
    1988.5
    [m ]
    3
    2503.5
    2519.0
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    23.0
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 1981-1983m
    Core photo at depth: 2507-2510m
    Core photo at depth: 1988-1989m
    Core photo at depth: 2503-2506m
    Core photo at depth: 1984-1987m
    1981-1983m
    2507-2510m
    1988-1989m
    2503-2506m
    1984-1987m
    Core photo at depth: 2511-2514m
    Core photo at depth: 2515-2518m
    Core photo at depth: 2519-2520m
    Core photo at depth:  
    Core photo at depth:  
    2511-2514m
    2515-2518m
    2519-2520m

  • 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
    375.0
    36
    380.0
    0.00
    LOT
    SURF.COND.
    20
    905.0
    26
    920.0
    1.41
    LOT
    INTERM.
    13 3/8
    1949.0
    17 1/2
    1965.0
    1.82
    LOT
    OPEN HOLE
    2600.0
    12 1/4
    2600.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    ACBL
    700
    1948
    CDL CNL GR
    1935
    2596
    COREGUN
    1968
    2583
    DIFL LSBHC CDL GR COREGUN
    904
    1963
    DIFL LSBHC GR
    1923
    2596
    DIFL TEMP GR
    266
    886
    DIPLOG
    1948
    2596
    FMT
    1973
    2482
    GR
    270
    380
    MWD - GR RES DIR
    375
    920
    MWD - GR RES DIR
    1028
    2600
    VSP
    270
    2591

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.35

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    1.18

  • 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
    48.65

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    633
    1.15
    9.0
    30.0
    WATER BASED
    21.08.1985
    920
    1.17
    8.0
    42.0
    WATER BASED
    21.08.1985
    1028
    1.15
    43.0
    16.0
    WATER BASED
    27.08.1985
    1338
    1.15
    42.0
    18.0
    WATER BASED
    28.08.1985
    1635
    1.25
    45.0
    19.0
    WATER BASED
    29.08.1985
    1965
    1.30
    47.0
    14.0
    WATER BASED
    30.08.1985
    1965
    1.35
    55.0
    18.0
    WATER BASED
    02.09.1985
    1965
    1.27
    16.0
    17.0
    WATER BASED
    05.09.1985
    1966
    1.27
    16.0
    17.0
    WATER BASED
    09.09.1985
    2118
    1.23
    17.0
    17.0
    WATER BASED
    09.09.1985
    2200
    1.20
    17.0
    16.0
    WATER BASED
    09.09.1985

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1780.0
    [m]
    SWC
    SAGA
    1800.0
    [m]
    SWC
    SAGA
    1820.0
    [m]
    DC
    SAGA
    1823.0
    [m]
    SWC
    SAGA
    1830.0
    [m]
    SWC
    SAGA
    1840.0
    [m]
    SWC
    SAGA
    1850.0
    [m]
    SWC
    SAGA
    1858.0
    [m]
    SWC
    SAGA
    1863.0
    [m]
    SWC
    SAGA
    1868.0
    [m]
    SWC
    SAGA
    1882.0
    [m]
    SWC
    SAGA
    1892.0
    [m]
    SWC
    SAGA
    1907.1
    [m]
    SWC
    SAGA
    1925.0
    [m]
    DC
    SAGA
    1940.0
    [m]
    DC
    SAGA
    1955.0
    [m]
    DC
    SAGA
    1968.0
    [m]
    DC
    SAGA
    1981.9
    [m]
    C
    SAGA
    1989.0
    [m]
    DC
    SAGA
    1998.0
    [m]
    DC
    SAGA
    2008.0
    [m]
    SWC
    SAGA
    2027.0
    [m]
    SWC
    SAGA
    2037.0
    [m]
    SWC
    SAGA
    2058.0
    [m]
    SWC
    SAGA
    2080.0
    [m]
    SWC
    SAGA
    2102.0
    [m]
    SWC
    SAGA
    2111.0
    [m]
    SWC
    SAGA
    2133.0
    [m]
    SWC
    SAGA
    2147.0
    [m]
    SWC
    SAGA
    2160.0
    [m]
    DC
    SAGA
    2185.0
    [m]
    SWC
    SAGA
    2203.0
    [m]
    SWC
    SAGA
    2212.0
    [m]
    SWC
    SAGA
    2230.0
    [m]
    SWC
    SAGA
    2244.0
    [m]
    DC
    SAGA
    2268.0
    [m]
    SWC
    SAGA
    2297.0
    [m]
    SWC
    SAGA
    2313.0
    [m]
    DC
    SAGA
    2331.0
    [m]
    DC
    SAGA
    2346.0
    [m]
    DC
    SAGA
    2358.0
    [m]
    DC
    SAGA
    2376.0
    [m]
    DC
    SAGA
    2383.0
    [m]
    SWC
    SAGA
    2393.0
    [m]
    SWC
    SAGA
    2410.0
    [m]
    SWC
    SAGA
    2424.0
    [m]
    DC
    SAGA
    2439.0
    [m]
    DC
    SAGA
    2450.0
    [m]
    SWC
    SAGA
    2462.0
    [m]
    SWC
    SAGA
    2472.5
    [m]
    SWC
    SAGA
    2478.0
    [m]
    DC
    SAGA
    2499.0
    [m]
    DC
    SAGA
    2503.5
    [m]
    C
    SAGA
    2514.0
    [m]
    SWC
    SAGA
    2519.8
    [m]
    C
    SAGA
    2529.0
    [m]
    DC
    SAGA
    2544.0
    [m]
    DC
    SAGA
    2557.0
    [m]
    SWC
    SAGA
    2574.0
    [m]
    SWC
    SAGA
    2592.0
    [m]
    DC
    SAGA
    2600.0
    [m]
    DC
    SAGA