Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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31.10.2024 - 01:27
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6507/6-4 S

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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.
    6507/6-4 S
    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
    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.
    6507/6-4
    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.
    E.ON Ruhrgas 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.
    1377-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.
    22
    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,
    26.10.2011
    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.
    16.11.2011
    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.
    15.03.2013
    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.
    15.03.2013
    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.
    31.2
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    363.5
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    1339.0
    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).
    1339.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    14.3
    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.
    RED BEDS (INFORMAL)
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    65° 38' 6.2'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    7° 43' 32.8'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7280010.99
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    441342.38
    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.
    6725

  • Wellbore history
    General
    Well 6507/6-4 S was drilled on the Sinbad prospect in the Norwegian Sea. Structurally the prospect is located on the Sør High of the Nordland Ridge in the Norwegian Sea. The target prospect was an amplitude anomaly in the lower part of the Triassic Grey Beds. The distance to the Skarv Field immediately to the west is 10 km and to the Heidrun Field (to the SSW) approximately 30 km. Well 6507/6-4 S was drilled outside the amplitude anomaly to the south drilled by well 6507/6-1 in 1988 by Saga Petroleum.
    Operations and results
    Wildcat well 6507/6-4 S was spudded with the semi-submersible installation Borgland Dolphin on 26 October 2011 and drilled to TD at 1339 m (1333 m TVD) in the Late Triassic Red Beds. Due to coldwater corals the 36" hole, pilot hole and 26" hole were drilled with a subsea cuttings transport system (CTS) to transport the drilled cuttings 500 m away from the spud location. A 9 7/8" pilot hole was drilled from 471 to 907 m. Small gas bubbles were observed at the CTS funnel when flow checking at 790 m. The source of the gas was believed to be +/- 767 m. No significant problem was encountered in the operations. The well was drilled with sea water and Bentonite based high-viscosity sweeps down to 749 m and with Carbo-Sea oil based mud from 749 m to TD.
    The formations came in close to prognosis with the Late Tertiary Kai Formation resting on top of the Early Jurassic Åre Formation at 1042 m. Top Grey Beds came in at 1208 m, with the Sinbad reservoir section at 1256 m. The latter was 12 m deep to prognosis. The Grey Beds Group consisted of rapidly changing sand-, silt- and claystone. Individual units were up to 5m thick, but generally 1-3 m. Trace of coal was reported. There were no indications of hydrocarbon shows in the well-bore.
    No cores were cut and no wire line fluid samples were taken. No formation evaluation except from Logging While Drilling (LWD) was performed.
    The well bore was classified as dry and was plugged back to the 20" casing before kicking off to drill the 6507/6-4 A to test a separate prospect. It was permanently abandoned on 16 November 2011.
    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]
    750.00
    1339.00

  • 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
    30.0
    36
    0.0
    0.00
    LOT
    CONDUCTOR
    30
    460.0
    36
    460.0
    0.00
    LOT
    SURF.COND.
    20
    743.0
    26
    749.0
    1.46
    LOT
    INTERM.
    9 5/8
    1198.0
    12 1/4
    1204.0
    1.62
    LOT
    OPEN HOLE
    1339.0
    8 1/2
    1339.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    MWD - DIR
    394
    465
    MWD - DIR
    465
    749
    MWD - GR RES PWD DT NEU DEN DIR
    749
    1339
    MWD - GR RES PWD SON DIR
    465
    907

  • Lithostratigraphy
    Lithostratigraphy
    Top depth [mMD RKB]
    Lithostrat. unit
    395
    395
    853
    1042
    1042
    1208
    1287

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    393
    1.05
    Spud Mud
    465
    1.05
    Spud Mud
    608
    1.05
    Spud Mud
    649
    1.25
    10.0
    kill mud
    823
    1.30
    22.0
    CARBO-SEA
    850
    1.05
    Spud Mud
    1186
    1.30
    23.0
    CARBO-SEA
    1339
    1.30
    22.0
    CARBO-SEA

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1043.0
    [m]
    DC
    FUGRO
    1052.0
    [m]
    DC
    FUGRO
    1061.0
    [m]
    DC
    FUGRO
    1070.0
    [m]
    DC
    FUGRO
    1079.0
    [m]
    DC
    FUGRO
    1088.0
    [m]
    DC
    FUGRO
    1097.0
    [m]
    DC
    FUGRO
    1106.0
    [m]
    DC
    FUGRO
    1115.0
    [m]
    DC
    FUGRO
    1127.0
    [m]
    DC
    FUGRO
    1136.0
    [m]
    DC
    FUGRO
    1145.0
    [m]
    DC
    FUGRO
    1154.0
    [m]
    DC
    FUGRO
    1163.0
    [m]
    DC
    FUGRO
    1172.0
    [m]
    DC
    FUGRO
    1181.0
    [m]
    DC
    FUGRO
    1190.0
    [m]
    DC
    FUGRO
    1199.0
    [m]
    DC
    FUGRO
    1208.0
    [m]
    DC
    FUGRO
    1217.0
    [m]
    DC
    FUGRO
    1226.0
    [m]
    DC
    FUGRO
    1235.0
    [m]
    DC
    FUGRO
    1244.0
    [m]
    DC
    FUGRO
    1256.0
    [m]
    DC
    FUGRO
    1262.0
    [m]
    DC
    FUGRO
    1268.0
    [m]
    DC
    FUGRO
    1280.0
    [m]
    DC
    FUGRO
    1292.0
    [m]
    DC
    FUGRO
    1304.0
    [m]
    DC
    FUGRO
    1316.0
    [m]
    DC
    FUGRO
    1328.0
    [m]
    DC
    FUGRO