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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6507/8-5

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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.
    6507/8-5
    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.
    6507/8-5
    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.
    670-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.
    15
    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,
    02.03.1991
    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.
    16.03.1991
    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.
    16.03.1993
    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.
    23.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    332.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2000.0
    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).
    2000.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    1.1
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    65
    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.
    TILJE FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    65° 20' 36.75'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    7° 38' 4.7'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7247612.81
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    436442.87
    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.
    1749

  • Wellbore history
    General
    Well 6507/8-5 was designed to drill the Omega prospect, a horst, located east of the Heidrun Field. Structurally the area is situated on the Sør High with the Halten Terrace to the southwest and the Trøndelag Platform to the East. The Omega horst had only a minor structural closure of 10-20 m, but assuming scaling capacity of a fault, a stratigraphic closure would exist both up-dip and further down-dip of the structural closure. The fault was prognosed with a maximum throw of 140 m on top Ror Formation level. The main objective of the well was to test the hydrocarbon and reservoir -potential of sandstones of the Middle/Early Jurassic Fangst Group supposed to be present on the downthrown eastern side of the fault. None of the nearby correlation wells penetrated highly over pressured formations. Shallow gas warnings were given for three levels in the interval 518 to 960 m.
    Operations and results
    Wildcat well 6507/8-5 was spudded with the semi-submersible installation Ross Rig on 3 March 1991 and drilled to TD at 2000 m MD in the Early Jurassic Tilje Formation. The well was drilled in 13 days without major problems. However, while drilling 9 7/8" pilot hole at 854 m shallow gas was encountered. The well was plugged back and a 13 3/8" casing was set above the gas. The well was drilled with seawater and hi-vis pills down to 818 m and with Gyp/PAC mud from 818 m to TD.
    Six meter of the Late Cretaceous Shetland Group was encountered at 1781 m; otherwise the Cretaceous section was absent in the well. Three meter of Spekk was penetrated at 1787 m. It was described as silty carbonaceous claystone with traces of coal fragments. The potential reservoir sands of the Fangst and Båt Groups were penetrated but proved not to be hydrocarbon bearing. No shows were recorded in any section of the well, not even in the claystone of the Spekk Formation. One conventional core was cut in the interval 1856.7 m to 1884.5 m in the Not/Ile Formations. A total of 60 sidewall cores were attempted; 60 were recovered. No Fluid samples were taken. The well was permanently abandoned on 16 March 1991 at 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]
    860.00
    2000.00

  • 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
    1857.7
    1879.3
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    21.6
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 1857-1862m
    Core photo at depth: 1862-1867m
    Core photo at depth: 1867-1872m
    Core photo at depth: 1872-1877m
    Core photo at depth: 1877-1879m
    1857-1862m
    1862-1867m
    1867-1872m
    1872-1877m
    1877-1879m

  • 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
    417.0
    36
    418.0
    0.00
    LOT
    INTERM.
    13 3/8
    808.0
    17 1/2
    810.0
    1.50
    LOT
    OPEN HOLE
    2000.0
    12 1/4
    2000.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CST
    850
    1985
    LDL CNL GR CAL
    809
    1990
    MWD - DPR
    425
    2000
    PI LSS GR CAL
    809
    1990
    VSP
    400
    1980

  • Lithostratigraphy
    Lithostratigraphy
    Top depth [mMD RKB]
    Lithostrat. unit
    356
    356
    1348
    1578
    1578
    1712
    1712
    1750
    1781
    1787
    1787
    1790
    1827
    1827
    1854
    1864
    1900
    1900
    1943

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.23

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    1.32

  • 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
    9.76

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    402
    1.03
    WATER BASED
    04.03.1991
    422
    1.03
    9.0
    13.0
    WATER BASED
    04.03.1991
    562
    1.20
    7.0
    9.5
    WATER BASED
    05.03.1991
    823
    1.10
    11.0
    4.5
    WATER BASED
    07.03.1991
    849
    1.03
    16.0
    6.5
    WATER BASED
    06.03.1991
    849
    1.03
    16.0
    6.5
    WATER BASED
    06.03.1991
    854
    1.03
    16.0
    6.5
    WATER BASED
    06.03.1991
    854
    1.10
    11.0
    4.5
    WATER BASED
    07.03.1991
    1438
    1.20
    24.0
    5.5
    WATER BASED
    11.03.1991
    1620
    1.26
    17.0
    4.0
    WATER BASED
    11.03.1991
    1620
    1.26
    18.0
    4.0
    WATER BASED
    13.03.1991
    1620
    1.26
    18.0
    4.5
    WATER BASED
    14.03.1991
    1620
    1.27
    DUMMY
    18.03.1991
    1824
    1.27
    17.0
    4.0
    WATER BASED
    11.03.1991
    1885
    1.27
    18.0
    4.0
    WATER BASED
    13.03.1991
    2000
    1.27
    DUMMY
    18.03.1991
    2000
    1.27
    18.0
    4.5
    WATER BASED
    14.03.1991

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1354.0
    [m]
    SWC
    STATO
    1430.0
    [m]
    SWC
    STATO
    1490.0
    [m]
    SWC
    STATO
    1500.0
    [m]
    DC
    STRAT
    1520.0
    [m]
    DC
    STRAT
    1540.0
    [m]
    SWC
    STATO
    1553.0
    [m]
    SWC
    STATO
    1560.0
    [m]
    DC
    STRAT
    1578.0
    [m]
    SWC
    STATO
    1590.0
    [m]
    DC
    STRAT
    1600.0
    [m]
    SWC
    STATO
    1620.0
    [m]
    DC
    STRAT
    1635.0
    [m]
    SWC
    STATO
    1648.0
    [m]
    SWC
    STATO
    1653.0
    [m]
    SWC
    STATO
    1661.0
    [m]
    SWC
    STATO
    1670.0
    [m]
    DC
    STRAT
    1680.0
    [m]
    DC
    STRAT
    1705.0
    [m]
    SWC
    STATO
    1775.0
    [m]
    SWC
    STATO
    1788.0
    [m]
    SWC
    STATO
    1800.0
    [m]
    DC
    STRAT
    1803.0
    [m]
    SWC
    STATO
    1809.0
    [m]
    DC
    STRAT
    1818.0
    [m]
    DC
    STRAT
    1824.0
    [m]
    DC
    STRAT
    1827.0
    [m]
    SWC
    STATO
    1836.0
    [m]
    DC
    STRAT
    1860.0
    [m]
    DC
    STRAT
    1866.0
    [m]
    DC
    STRAT
    1872.0
    [m]
    DC
    STRAT
    1878.0
    [m]
    DC
    STRAT
    1884.0
    [m]
    DC
    STRAT
    1889.0
    [m]
    SWC
    STATO
    1895.0
    [m]
    SWC
    STATO
    1898.0
    [m]
    SWC
    STATO
    1900.0
    [m]
    SWC
    STATO
    1902.0
    [m]
    SWC
    STATO
    1908.0
    [m]
    DC
    STRAT
    1912.0
    [m]
    SWC
    STATO
    1917.0
    [m]
    DC
    STRAT
    1925.0
    [m]
    SWC
    STATO
    1929.0
    [m]
    DC
    STRAT
    1934.0
    [m]
    SWC
    STATO
    1935.0
    [m]
    DC
    STRAT
    1943.0
    [m]
    SWC
    STATO
    1945.0
    [m]
    SWC
    STATO
    1950.0
    [m]
    DC
    STRAT
    1956.0
    [m]
    DC
    STRAT
    1965.0
    [m]
    SWC
    STATO
    1985.0
    [m]
    SWC
    STATO
    1989.0
    [m]
    DC
    STRAT
    1995.0
    [m]
    DC
    STRAT
    2000.0
    [m]
    DC
    STRAT