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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3/7-7

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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.
    3/7-7
    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
    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
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    3/7-7
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    Seismic survey GD04M01-inline 1570 & x-line 1410
    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.
    DONG E&P 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.
    1198-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.
    55
    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,
    03.09.2008
    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.
    27.10.2008
    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.
    27.10.2010
    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.
    27.10.2010
    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.
    SHOWS
    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.
    42.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    65.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3930.0
    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).
    3930.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    3.2
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    127
    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 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.
    HAUGESUND FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    56° 24' 10.58'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    4° 18' 3.14'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6251825.14
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    580287.68
    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.
    5932

  • Wellbore history
    General
    Well 3/7-7 was drilled on the Marsvin prospect in the southern Søgne Basin, close to the Danish border in the southern North Sea. The objective of the well was to explore the hydrocarbon potential in Kimmeridgian-Volgian age ("Intra Farsund") sandstones.
    Operations and results
    Wildcat well 2/7-7 was spudded with the jack-up installation Mærsk Guardian on 3 September 2008 and drilled to TD at 3930 m, 73 m into the Late Jurassic Haugesund Formation. The well was drilled very efficiently, except for very low penetration rate when drilling in hard marls in the Ekofisk/Tor Formations. The well was drilled with Seawater/spud mud down to 655 m, with KCl polymer mud from 655 to 1308 m, and with CARBO-SEA oil based mud from 1308 m to TD.
    The Marsvin 3/7-7 well penetrated four Kimmeridgian age sandstones in the interval 3457 to 3813 m: two J63 sandstones and two J62 sandstones interbedded in Farsund Formation shales. From petrophysical analyses the four sandstones comprised a total of 143 m gross and 106 m net reservoir with porosities in the range 17.5 to 22.4% and an average permeability of 108 mD. All reservoirs were water wet.
    Very weak shows, just above that of OBM, were seen in the upper J62 sandstone (3770 to 3813 m), otherwise no oil shows were reported from the well, or they were masked by the base oil in the mud. Similar observation was made in post-well geochemical analyses of samples from the well; all migrated hydrocarbons and even the total organic carbon in cuttings and side wall cores samples were overprinted by the oil base, only the core samples from the lower J62 sandstone clearly showed migrated hydrocarbons.
    One core was cut in the lowermost J62 sandstone from 3776.0 m - 3830.5 m, a total of 54.5 m, with a recovery of 99%. RCI wire line water samples were taken at 3748.5 m and at 3799.8 m.
    The well was permanently abandoned on 27 October 2008 as a well with shows.
    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]
    220.00
    3930.00

  • 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
    3776.0
    3830.1
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    54.1
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    670.0
    [m]
    DC
    DONG
    1320.0
    [m]
    DC
    DONG
    1390.0
    [m]
    DC
    DONG
    1400.0
    [m]
    DC
    DONG
    1410.0
    [m]
    DC
    DONG
    1420.0
    [m]
    DC
    DONG
    2060.0
    [m]
    DC
    DONG
    2080.0
    [m]
    DC
    DONG
    2120.0
    [m]
    DC
    DONG
    2140.0
    [m]
    DC
    DONG
    2850.0
    [m]
    DC
    DONG
    2860.0
    [m]
    DC
    DONG
    2870.0
    [m]
    DC
    DONG
    2880.0
    [m]
    DC
    DONG
    2890.0
    [m]
    DC
    DONG
    2900.0
    [m]
    DC
    DONG
    2910.0
    [m]
    DC
    DONG
    2920.0
    [m]
    DC
    DONG
    2930.0
    [m]
    DC
    DONG
    2940.0
    [m]
    DC
    DONG
    3391.0
    [m]
    DC
    DONG
    3409.0
    [m]
    DC
    DONG
    3418.0
    [m]
    DC
    DONG
    3421.0
    [m]
    DC
    DONG
    3424.0
    [m]
    DC
    DONG
    3427.0
    [m]
    DC
    DONG
    3433.0
    [m]
    DC
    DONG
    3439.0
    [m]
    DC
    DONG
    3442.0
    [m]
    DC
    DONG
    3454.0
    [m]
    DC
    DONG
    3457.0
    [m]
    DC
    DONG
    3472.0
    [m]
    DC
    DONG
    3478.0
    [m]
    DC
    DONG
    3502.0
    [m]
    DC
    DONG
    3508.0
    [m]
    DC
    DONG
    3556.0
    [m]
    DC
    DONG
    3568.0
    [m]
    DC
    DONG
    3598.0
    [m]
    DC
    DONG
    3601.0
    [m]
    DC
    DONG
    3646.0
    [m]
    DC
    DONG
    3652.0
    [m]
    DC
    DONG
    3700.0
    [m]
    DC
    DONG
    3703.0
    [m]
    DC
    DONG
    3730.0
    [m]
    DC
    DONG
    3736.0
    [m]
    DC
    DONG
    3757.0
    [m]
    DC
    DONG
    3766.0
    [m]
    DC
    DONG
    3779.0
    [m]
    C
    DONG
    3783.0
    [m]
    C
    DONG
    3797.0
    [m]
    C
    DONG
    3803.0
    [m]
    C
    DONG
    3814.0
    [m]
    C
    DONG
    3822.0
    [m]
    C
    DONG
    3829.0
    [m]
    C
    DONG
    3835.0
    [m]
    DC
    DONG
    3847.0
    [m]
    DC
    DONG
    3862.0
    [m]
    DC
    DONG
    3871.0
    [m]
    DC
    DONG
    3883.0
    [m]
    DC
    DONG
    3895.0
    [m]
    DC
    DONG
    3904.0
    [m]
    DC
    DONG
    3913.0
    [m]
    DC
    DONG
    3922.0
    [m]
    DC
    DONG
    3930.0
    [m]
    DC
    DONG

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.48

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    txt
    0.00
    txt
    0.23

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    DSL
    200
    3431
    DSL HDIL XMAC ZDL CN
    3428
    3929
    LWD - GR EWR PWD D&I
    216
    1308
    LWD - GR EWR PWD D&I
    2965
    3930
    LWD - PDGR GR EWR PW D D&1
    1308
    2965
    RCI SV GR
    3460
    3800
    SWC GR
    3440
    3920
    VSP GWV GR
    2115
    3915
    ZDL XMAC
    3182
    3431

  • 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
    206.0
    36
    216.0
    0.00
    LOT
    SURF.COND.
    18 5/8
    646.0
    24
    655.0
    1.40
    LOT
    INTERM.
    13 3/8
    1304.0
    17 1/2
    1308.0
    1.40
    LOT
    INTERM.
    9 5/8
    3429.0
    12 1/4
    3434.0
    1.56
    LOT
    OPEN HOLE
    3930.0
    8 1/2
    3930.0
    0.00
    LOT

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    655
    1.30
    16.0
    Polymer
    955
    1.39
    20.0
    Polymer
    1308
    1.39
    24.0
    Polymer
    1465
    1.56
    42.0
    Oil (regular)
    3097
    1.56
    21.0
    Oil (regular)
    3122
    1.56
    32.0
    Oil (regular)
    3278
    1.62
    40.0
    Oil (regular)
    3434
    1.57
    33.0
    Oil (regular)
    3596
    1.60
    33.0
    Oil (regular)
    3930
    1.61
    37.0
    Oil (regular)