Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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21.11.2024 - 01:28
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8/10-3

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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.
    8/10-3
    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
    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.
    8/10-3
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    intersection of inline 7264 and trace 24860
    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.
    ConocoPhillips Skandinavia 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.
    1242-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.
    127
    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,
    02.06.2010
    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.
    06.10.2010
    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.
    01.04.2012
    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.
    01.04.2012
    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.
    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.
    45.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    68.5
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    5738.0
    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).
    5737.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    2
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    176
    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 PERMIAN
    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.
    ROTLIEGEND GP
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    57° 2' 23.57'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    3° 17' 1.85'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6322002.76
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    517225.49
    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.
    6098

  • Wellbore history
    General
    Well 8/10-3 was drilled on the Megalodon prospect in the western part of Norwegian-Danish Basin in the southern North Sea. The objective was to test the pre-Zechstein play potential of the Rotliegendes sandstone (Auk Formation equivalent) in relation to a potential Carboniferous source. The evaporites of the Upper Permian Zechstein Group form an effective top seal. The Megalodon well was planned as a vertical HPHT well with an anticipated dry hole TD of 5600 m.
    Operations and results
    Wildcat well 8/10-3 was spudded with the jack-up installation Mærsk Galant on and drilled to TD at 5737 m in sandstone of the Permian Rotliegendes Group. A 12 1/4" pilot hole was drilled from 261 to 1061 m to check for shallow gas. A notable formation gas peak of 7.7% (C1 only) occurred at 566m in a thick sand unit. This correlated with a shallow gas anomaly identified on the site survey 67 m from the well position. The well was drilled with seawater and sweeps down to 216 m, with spud mud and NaCl water based mud from 216 m to 1100 m, with Versatec oil based mud from 1100 m to 3452 m, and with Paratherm oil based mud from 3452 m to TD.
    The well was dry at the Rotliegendes target. No specific secondary target had been identified, however, due to the position of the well on top of a salt diapir, 4-way dip closures were drilled through at several levels from Paleocene to Top Zechstein. No hydrocarbons were found here. Sandstone and siltstone were penetrated in the Triassic, Skagerrak and Smith Bank Formation. Above this, the Jurassic Mandal, Farsund and Sandnes Formation were penetrated without sand.
    The Rotliegendes Group, penetrated at 5397.5 m, came in 56.5 m low to prognosis, under 2003 m of Zechstein salt and carbonates. The uppermost 192m of the Rotliegendes consisted of shales interbedded with argillaceous sandstones, overlying 154 m of well developed Auk Formation Equivalent sandstones with interbedded shales. Dead oil and tarry oil stains were observed in sandstones at several depths often confined to the upper parts of the sandstone beds. The reservoir properties of the sandstones are good, with porosities averaging 18% and a net-to-gross of 77%. Three pressure points were obtained in the lower sandstone unit using the XPT tool. These indicate permeabilities in the 2 - 4 mD range.
    No cores were cut and no wire line fluid samples were taken.
    The well was permanently abandoned on 6 October 2010 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]
    220.00
    5738.00

  • Lithostratigraphy

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    MWD - DIR
    113
    216
    MWD - DIR
    216
    1100
    MWD - RLL GR RES PWD DIR
    216
    1061
    MWD - RLL GR RES PWD DIR
    3023
    3452
    MWD - RLL GR RES PWD GEOTAP DIR
    5350
    5575
    MWD - RLL GR RES PWD SON DIR
    3452
    5350
    QAIT QSLT QTGC
    113
    5743
    XPT-H
    5599
    5612

  • 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
    208.0
    36
    216.0
    0.00
    LOT
    PILOT HOLE
    1061.0
    12 1/4
    1061.0
    0.00
    LOT
    SURF.COND.
    20
    1080.0
    26
    1100.0
    1.73
    LOT
    INTERM.
    13 5/8
    3447.0
    17 1/2
    3452.0
    2.15
    LOT
    INTERM.
    9 5/8
    5245.0
    12 1/2
    5350.0
    2.15
    LOT
    OPEN HOLE
    5738.0
    8 1/2
    5738.0
    0.00
    LOT

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    216
    1.05
    4.0
    Spud Mud
    510
    1.10
    7.0
    Spud Mud
    730
    1.61
    34.0
    Versatec
    890
    1.13
    6.0
    Spud Mud
    980
    1.22
    16.0
    NACl Brine
    1088
    1.25
    15.0
    NACl Brine
    1100
    1.43
    34.0
    Versatec
    1190
    1.43
    38.0
    Versatec
    2646
    1.58
    44.0
    Versatec
    3023
    1.55
    41.0
    Versatec
    3452
    1.61
    55.0
    Versatec
    4005
    1.97
    52.0
    Paratherm
    5350
    1.94
    35.0
    Paratherm
    5466
    1.94
    52.0
    Paratherm
    5552
    1.79
    26.0
    Paratherm
    5738
    1.77
    36.0
    Paratherm