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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30/11-8 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.
    30/11-8 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.
    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.
    30/11-8
    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.
    Statoil Petroleum 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.
    1339-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.
    62
    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,
    20.03.2011
    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.
    20.05.2011
    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.
    20.05.2013
    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.
    20.05.2013
    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.
    OIL/GAS/CONDENSATE
    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.
    YES
    1st level with HC, age
    Age of lithostratigraphic unit, 1st level, where hydrocarbons were encountered. Examples of legal values: CRETACEOUS, EARLY CRETACEOUS, LATE JURASSIC, EOCENE. See also Norwegian Offshore Directorate bulletins.
    MIDDLE JURASSIC
    1st level with HC, formation
    Name of lithostartigraphic unit, 1st level, where hydrocarbons were encountered. Shown only for released wells. Examples of legal values: BASEMENT, COOK FM, EKOFISK FM, HEIMDAL FM, SANDNES FM, SOGNEFJORD FM, TARBERT FM, BRENT GP. See also Norwegian Offshore Directorate bulletins.
    TARBERT FM
    2nd level with HC, age
    Age of lithostratigraphic unit, 2nd level, where hydrocarbons were encountered. Examples of legal values: CRETACEOUS, EARLY CRETACEOUS, LATE JURASSIC, EOCENE.
    MIDDLE JURASSIC
    2nd level with HC, formation
    Name of lithostartigraphic unit, 2nd level, where hydrocarbons were encountered. Shown only for released wells. Examples of legal values: BASEMENT, COOK FM, EKOFISK FM, HEIMDAL FM, SANDNES FM, SOGNEFJORD FM, TARBERT FM, BRENT GP.
    NESS FM
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    22.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    107.5
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    4043.0
    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).
    3844.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    46.9
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    133
    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 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.
    DRAKE FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    60° 13' 3.03'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 29' 22.2'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6675900.93
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    471711.39
    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.
    6540

  • Wellbore history
    General
    Well 30/11-8 S was drilled on the Krafla prospect in the Fensal Sub-basin between the Frigg and Oseberg fields in the North Sea. The Krafla prospect is a horst structure with multiple reservoir levels. The main objective of the well was to prove a commercial hydrocarbon accumulation in the Upper and Middle Tarbert Formation with potential also for finding hydrocarbon accumulations in the deeper Etive and Ness Formations. A secondary well objective was to test a lead within the Paleocene Sele Formation (Hermod Sandstone). A geological sidetrack to the Krafla West structure would be considered if hydrocarbons and producible reservoir in the Brent Group were proven in the main well.
    Operations and results
    Well 30/11-8 S was spudded with the semi-submersible installation Ocean Vanguard on 20 March 2011 and drilled to TD at 4043 m (3844 m TVD) in the Early Jurassic Drake Formation. No significant problem was encountered in the operations. No shallow gas was detected. The well was drilled with seawater and hi-vis pills down to 813 m, with Performadrill WBM from 813 m to 2214 m, and with XP-07 OBM from 2214 m to TD.
    The Viking Group, Heather Formation came in at 3473 m (3285 m TVD). The upper part of Heather had water filled sandstones with oil shows. The Brent Group was encountered at 3528.9 m (3339.0 m TVD) which was 17 m TVD deeper than prognosed. The Upper and Middle Tarbert Formation reservoirs proved to be oil filled, but no OWC was encountered. The Ness Formation came in at 3732 m (3538 m TVD) and proved to be both condensate and water filled, but no contact was found. The Etive Formation was water filled without shows. Also the lead in the Sele Formation (Hermod Sandstone) proved to be water filled.
    Two cores were cut in the intervals 3481 to 3508 m (Heather Formation) and 3611 to 3666 m (Tarbert Formation). MDT fluid samples were taken at 3478 m (water), 3614.5 m (oil), 3555 m (oil), 3663.4 m (oil), 3748.2 m (condensate), and 3827.7 m (water). The oil samples had a contamination of 14 to 17 %, while the condensate sample was 30 % contaminated. All samples were taken with the MDT single probe.
    The well bore was plugged back for sidetracking on 20 May 2011 as an oil and condensate discovery.
    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]
    810.00
    4041.00

  • 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
    3481.0
    3508.8
    [m ]
    2
    3611.0
    3666.4
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    83.1
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Oil samples at the Norwegian Offshore Directorate
    Oil samples at the Norwegian Offshore Directorate
    Test type
    Bottle number
    Top depth
    MD [m]
    Bottom depth
    MD [m]
    Fluid type
    Test time
    Samples available
    DST
    3555.00
    0.00
    OIL
    YES
    DST
    0.00
    3614.50
    OIL
    YES
    DST
    0.00
    3614.50
    OIL
    YES
    DST
    0.00
    3748.20
    OIL
    YES
    DST
    0.00
    3748.22
    OIL
    YES

  • 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
    189.0
    36
    198.0
    0.00
    LOT
    SURF.COND.
    20
    802.5
    26
    813.0
    1.46
    LOT
    INTERM.
    14
    2202.7
    17 1/2
    2214.0
    1.45
    LOT
    INTERM.
    9 5/8
    3301.0
    12 1/4
    3308.0
    1.85
    LOT
    OPEN HOLE
    4043.0
    8 1/2
    4043.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CMR
    3450
    3920
    DUAL OBMI
    3301
    4035
    LWD - ARCVRES9 TELE
    193
    2208
    LWD - GVR6 ARCVRES6 PP
    3302
    4043
    LWD - GVR8 ARCVRES8 VSON8 VADN8
    2208
    3302
    LWD - POWERPULSE
    129
    193
    MDT MINI-DST
    3476
    3657
    MDT PP
    3477
    3982
    MDT SA
    3555
    3614
    MDT SA
    3663
    3827
    MSIP CBL
    2141
    3301
    MSIP CBL
    3301
    4035
    PEX AIT HNGS
    3301
    4048
    VSP
    795
    4000

  • Lithostratigraphy

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    txt
    0.00
    txt
    0.05

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    173
    1.35
    24.0
    Spud Mud
    173
    1.60
    40.0
    Kill Fluid- SW/Bentonite
    194
    1.60
    41.0
    Kill Fluid- SW/Bentonite
    194
    1.35
    23.0
    Spud Mud
    229
    1.60
    42.0
    Kill Fluid- SW/Bentonite
    390
    1.35
    24.0
    Spud Mud
    803
    1.35
    21.0
    Performadril
    1016
    1.35
    29.0
    Performadril
    1214
    1.35
    24.0
    Performadril
    1541
    1.35
    25.0
    Performadril
    2134
    1.45
    27.0
    XP-07 - #14
    2158
    1.35
    31.0
    Performadril
    2208
    1.33
    17.0
    XP-07 - #14
    2211
    1.34
    16.0
    XP-07 - #14
    2803
    1.34
    20.0
    XP-07 - #14
    3302
    1.55
    28.0
    XP-07 - #14
    3302
    1.37
    25.0
    XP-07 - #14
    3508
    1.55
    27.0
    XP-07 - #14
    3597
    1.57
    41.0
    XP-07 - #14
    3666
    1.55
    30.0
    XP-07 - #14
    4043
    1.56
    30.0
    XP-07 - #14
    4043
    1.55
    29.0
    XP-07 - #14