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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3/5-2

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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.
    3/5-2
    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
    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.
    3/5-2
    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.
    Norwegian Gulf Exploration Company 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.
    199-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.
    53
    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,
    29.06.1978
    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.
    20.08.1978
    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.
    20.08.1980
    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.
    24.09.2004
    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.
    25.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    67.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3825.0
    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).
    3824.0
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    110
    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.
    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.
    SMITH BANK FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    56° 32' 34.46'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    4° 23' 11.1'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6267506.24
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    585252.66
    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.
    291

  • Wellbore history
    General
    Exploration well 3/5-2 is located in the eastern part of the Søgne Basin. The main objective was to test the hydrocarbon potential of northeasterly dipping Jurassic sands, which appeared to be truncated up dip by erosion at a Late Kimmerian unconformity. The exact age of the beds above and below the unconformity could not be predicted with certainty with the seismic evidence available. There was no capable closure at any post unconformity horizon higher than that mapped as Late Kimmerian unconformity just above a possible Jurassic Sand.
    Well 3/5-2 is Reference well for the Middle to Late Jurassic Haugesund Formation
    Operations and results
    Wildcat well 3/5-2 was spudded with the semi-submersible installation Odin Drill on 29 June 1978 and drilled to TD at 3826 m in the Triassic Skagerrak Formation. The well was drilled without significant problems. After drilling 164 m of 36" hole the pipe was stuck, but after spotting two 60 Bbl LCM pills followed by an 85 Bbl pill of Pipe Lax the string pulled free without significant lost time. Drilling went on through the 26" section to 462 m using viscous gel mud. From 426 m to TD the well was drilled using a Drispac/Spersene mud system, adding Resinex from ca 3080 m.
    Reservoir potential was encountered in the Late Cretaceous Chalk (Maastrichtian 2708.5 m to 2726.5 m) and in Late Jurassic (3174 m to 3185 m) and Triassic (3575 m to 3823.5 m) sandstones. Geochemical analyses proved oil prone shale, marginally mature (%Ro = 0.6 û 0.7), in the Late Jurassic Kimmeridge Clay with TOC measured up to2.1 %. Also the Middle Jurassic Haldager Formation contained shales with potential for gas and possibly some oil. Vitrinite reflectance in one sample from this Formation was %Ro = 0.85. Small quantities of C1 to C4 were recorded in the Late Jurassic Kimmeridge Clay Formation (3143 m to 3163 m) and in even smaller amounts in shales at the top of the Middle Jurassic (3331 m to 3359 m). A slight, streaming crush cut fluorescence was obtained from the shales of the Kimmeridge Clay Formation. A slight to good light yellow fluorescence was also recorded in samples of the Middle Jurassic at 3359 m and at 3368 m. There were no other indications of hydrocarbons in the mud or cuttings. Subsequent log analysis confirmed that hydrocarbons were not present in any significant quantities. No conventional cores were taken, but 72 sidewall cores were recovered from the Jurassic and Triassic. No fluid samples were taken. The well was permanently abandoned as a dry hole on 20 August 1978.
    Testing
    No drill stem test was performed

  • Cuttings at the Norwegian Offshore Directorate
    Cuttings at the Norwegian Offshore Directorate
    Cuttings available for sampling?
    NO
    Cuttings at the Norwegian Offshore Directorate
    Cutting sample, top depth [m]
    Cutting samples, bottom depth [m]
    167.64
    3825.24

  • 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
    162.0
    36
    163.0
    0.00
    LOT
    SURF.COND.
    20
    463.0
    26
    466.0
    0.00
    LOT
    INTERM.
    13 3/8
    1667.0
    17 1/2
    1670.0
    0.00
    LOT
    INTERM.
    9 5/8
    3152.0
    12 1/4
    3155.0
    0.00
    LOT
    OPEN HOLE
    3825.0
    8 1/2
    3825.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    FDC
    1668
    3165
    FDC CNL
    3153
    3822
    HDT DIP
    3153
    3823
    ISF SONIC
    162
    475
    ISF SONIC
    463
    1668
    ISF SONIC
    1668
    3164
    ISF SONIC
    3085
    3823
    SWC
    0
    0
    TEMP
    119
    3131
    VELOCITY
    492
    3740

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.51

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    0.51
    pdf
    0.45

  • Documents – reported by the production licence (period for duty of secrecy expired)

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    133
    1.05
    60.0
    seawater
    476
    1.08
    59.0
    seawater
    1679
    1.24
    54.0
    seawater
    2273
    1.29
    61.0
    seawater
    2837
    1.31
    52.0
    seawater
    3108
    1.37
    56.0
    seawater
    3622
    1.50
    63.0
    seawater
    3825
    1.54
    62.0
    seawater

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1300.0
    [m]
    DC
    STAT
    1330.0
    [m]
    DC
    STAT
    1360.0
    [m]
    DC
    STAT
    1390.0
    [m]
    DC
    STAT
    1420.0
    [m]
    DC
    STAT
    1450.0
    [m]
    DC
    STAT
    1480.0
    [m]
    DC
    STAT
    1510.0
    [m]
    DC
    STAT
    1540.0
    [m]
    DC
    STAT
    1560.0
    [m]
    DC
    STAT
    1590.0
    [m]
    DC
    STAT
    1620.0
    [m]
    DC
    STAT
    1650.0
    [m]
    DC
    STAT
    1710.0
    [m]
    DC
    STAT
    1740.0
    [m]
    DC
    STAT
    1770.0
    [m]
    DC
    STAT
    1800.0
    [m]
    DC
    STAT
    1830.0
    [m]
    DC
    STAT
    1860.0
    [m]
    DC
    STAT
    1920.0
    [m]
    DC
    STAT
    1950.0
    [m]
    DC
    STAT
    1980.0
    [m]
    DC
    STAT
    2010.0
    [m]
    DC
    STAT
    2040.0
    [m]
    DC
    STAT
    2070.0
    [m]
    DC
    STAT
    2100.0
    [m]
    DC
    STAT
    2130.0
    [m]
    DC
    STAT
    2160.0
    [m]
    DC
    STAT
    2190.0
    [m]
    DC
    STAT
    2220.0
    [m]
    DC
    STAT
    2250.0
    [m]
    DC
    STAT
    2280.0
    [m]
    DC
    STAT
    2310.0
    [m]
    DC
    STAT
    2340.0
    [m]
    DC
    STAT
    2370.0
    [m]
    DC
    STAT
    2400.0
    [m]
    DC
    STAT
    2450.0
    [m]
    DC
    STAT
    2460.0
    [m]
    DC
    STAT
    2490.0
    [m]
    DC
    STAT
    2520.0
    [m]
    DC
    STAT
    2550.0
    [m]
    DC
    STAT
    2580.0
    [m]
    DC
    STAT
    2610.0
    [m]
    DC
    STAT
    2640.0
    [m]
    DC
    STAT
    2670.0
    [m]
    DC
    STAT
    2700.0
    [m]
    DC
    STAT
    2730.0
    [m]
    DC
    STAT
    3163.7
    [m]
    SWC
    APT
    3169.8
    [m]
    SWC
    APT
    3175.9
    [m]
    SWC
    APT
    3177.1
    [m]
    SWC
    APT
    3177.7
    [m]
    SWC
    APT
    3227.9
    [m]
    SWC
    APT
    3254.5
    [m]
    SWC
    APT
    3270.3
    [m]
    SWC
    APT
    3274.0
    [m]
    SWC
    APT
    3300.8
    [m]
    SWC
    APT
    3317.3
    [m]
    SWC
    APT
    3325.2
    [m]
    SWC
    APT
    3343.5
    [m]
    SWC
    APT
    3344.4
    [m]
    SWC
    APT
    3345.6
    [m]
    SWC
    APT
    3353.9
    [m]
    SWC
    APT
    3355.9
    [m]
    SWC
    APT
    3366.7
    [m]
    SWC
    APT
    3374.9
    [m]
    SWC
    APT
    3377.3
    [m]
    SWC
    APT
    3379.8
    [m]
    SWC
    APT
    3381.5
    [m]
    SWC
    APT
    3388.9
    [m]
    SWC
    APT
    3404.4
    [m]
    SWC
    APT
    3414.8
    [m]
    SWC
    APT
    3414.8
    [m]
    SWC
    APT
    3417.3
    [m]
    SWC
    APT
    3419.7
    [m]
    SWC
    APT
    3422.0
    [m]
    SWC
    APT
    3432.8
    [m]
    SWC
    APT
    3441.3
    [m]
    SWC
    APT
    3451.9
    [m]
    SWC
    APT
    3459.6
    [m]
    SWC
    APT
    3471.5
    [m]
    SWC
    APT
    3530.9
    [m]
    SWC
    APT
    3533.1
    [m]
    SWC
    APT
    3539.5
    [m]
    SWC
    APT
    3556.8
    [m]
    SWC
    APT
    3558.9
    [m]
    SWC
    APT
    3562.9
    [m]
    SWC
    APT
    3571.8
    [m]
    SWC
    APT
    3573.6
    [m]
    SWC
    APT
    3575.1
    [m]
    SWC
    APT
    10450.0
    [ft]
    DC
    APT
    10465.0
    [ft]
    DC
    APT
    10485.0
    [ft]
    DC
    APT
    10500.0
    [ft]
    DC
    APT
    10520.0
    [ft]
    DC
    APT