Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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05.05.2024 - 01:32
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2/11-12 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.
    2/11-12 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).
    APPRAISAL
    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
    Field
    Name of the field the wellbore is related to.
    Discovery
    Name of the discovery the wellbore is related to.
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    2/11-12
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    ABPN217 random line
    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.
    Aker BP ASA
    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.
    1744-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.
    34
    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,
    10.01.2019
    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.
    12.02.2019
    Plugged date
    Date when plugging operations was finished, as reported by the operator to the Norwegian Offshore Directorate through DDRS (Daily Drilling Reporting System).
    12.02.2019
    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.
    12.02.2021
    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.
    30.04.2021
    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.
    APPRAISAL
    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.
    55.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    70.5
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2956.0
    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).
    2939.0
    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 CRETACEOUS
    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.
    HIDRA FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    56° 10' 10.93'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    3° 26' 12.54'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6225190.98
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    527125.04
    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.
    8639

  • Wellbore history
    General
    Well 2/11-12 S “West Hod Appraisal” was drilled as part of the Hod Field Development Project (HFD). The well is located on the Skrubbe Fault between the Lindesnes Ridge and the Ål Basin in the North Sea. The primary objective for appraisal well 2/11-12 S was to delineate the western part of the Hod field. The secondary objective was to examine reservoir rocks (diatomites) in the Miocene in the Hordaland group (Lark Formation).
    Operations and results
    A 9 7/8” Pilot hole was drilled to 540 m. No shallow gas or water flow was observed.
    Appraisal well 2/11-12 S was spudded with the jack-up installation Mærsk Interceptor on 10 January 2019 and drilled to TD at 2956 m (2939 m TVD) m in the Late Cretaceous Hidra Formation. An abrupt mud loss at 2731 m MD in the lower Balder Formation was observed, with initial mud loss rate at 23 m3/hr. This mud loss was observed to rapidly diminish by 2750 m MD upon further drilling into the underlying Sele Formation. A fault is possible in this interval. The well was drilled with seawater and hi-vis pills down to 541 m and with oil-based mud from 540 m to TD.
    In the primary target in the Hod formation, a limestone interval of about 120 meters with poor reservoir properties was encountered. There were traces of oil in the limestone rocks. Good shows wear recorded in the interval 2841 to 2859 (stain, direct fluorescence, cut fluorescence, and ring fluorescence), and in the intervals 2907 to 2916 m and 2937 to 2943 m (no stain, direct fluorescence, cut fluorescence, no residual ring)
    In the secondary target in the Hordaland group, 200 metres of reservoir rocks with poor reservoir properties and traces of oil were encountered. Good shows were recorded in the intervals 1554 to 1560 m and 1617 to 1647 m (strong petroleum smell, no stain, direct fluorescence, cut fluorescence and ring fluorescence).
    The Miocene target was cored in 5 cores from 1485 m to 1674.3 m. The Chalk target was not cored. MDT fluid samples were taken in the Miocene at 1538 m (oil), and in the chalk at 2838 m (water with 5 cm3 oil), 2840.6 m (oil with 10 cm3 water) and 2846.8 m (oil with 10 cm3 water). Analyses of the samples from the chalk showed mud contamination between 40% and 75% in the oil fractions.
    The well was permanently abandoned on 12 February 2019 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]
    550.00
    2955.00

  • 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
    1485.0
    1515.7
    [m ]
    2
    1518.5
    1551.5
    [m ]
    3
    1551.6
    1609.2
    [m ]
    4
    1610.5
    1647.2
    [m ]
    5
    1653.5
    1674.0
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    178.3
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Lithostratigraphy

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    FTNG
    1527
    1683
    FTNG
    1538
    2846
    HNGS PEX MSIP QG ZAIT
    1426
    1773
    LWD - ECD RES GR
    1435
    1485
    LWD - GR ECD RES NØ DEN SON
    1485
    2955
    LWD - GR ECD RES SON
    541
    1435
    LWD - GR RES ECD SON
    125
    540
    MDT MF
    1435
    1774
    UIB GPIT PPC GR
    1490
    2945
    XLR SWC
    2723
    2943
    XPT ADT MRX NEXT
    1426
    1773
    XPT ADT NEXT MRX
    1426
    2996
    ZAIT NGI MSIP PEX HNGS
    1426
    2996

  • 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
    20
    535.8
    26
    541.0
    1.63
    LOT
    PILOT HOLE
    540.0
    9 7/8
    540.0
    0.00
    INTERM.
    13 3/8
    1426.4
    16
    1435.0
    1.95
    LOT
    OPEN HOLE
    2955.7
    8 1/2
    2955.7
    0.00

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    1
    1.05
    Bentonite
    1
    1.02
    Sea water in well.
    1
    1.31
    20.0
    Glydril WBM/ Displacementmud.
    542
    1.39
    29.0
    RheGuard Prime
    1047
    1.41
    31.0
    RheGuard Prime
    1282
    1.51
    34.0
    RheGuard Prime
    1366
    1.73
    43.0
    RheGuard Prime
    1435
    1.57
    36.0
    RheGuard Prime
    1437
    1.69
    35.0
    RheGuard Prime
    1485
    1.73
    37.0
    RheGuard Prime
    2455
    1.75
    39.0
    RheGuard Prime
    2630
    1.73
    36.0
    RheGuard Prime
    2768
    1.75
    37.0
    RheGuard Prime
    2879
    1.73
    38.0
    RheGuard Prime
    2955
    1.75
    38.0
    RheGuard Prime