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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30/9-21 A

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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.
    30/9-21 A
    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
    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.
    30/9-21
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    Seismic 3 D survey:N9802.inline1141 & xline 2425
    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.
    StatoilHydro 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.
    1178-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.
    43
    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,
    04.05.2008
    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.
    15.06.2008
    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.
    15.06.2010
    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.
    15.06.2010
    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.
    OIL
    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.
    LATE 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.
    INTRA HEATHER FM SS
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    26.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    106.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    4086.0
    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).
    3410.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    49.9
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    132
    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° 25' 29.12'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 41' 38.47'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6698913.45
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    483151.56
    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.
    5805

  • Wellbore history
    General
    Well 30/9-21 A was drilled in the Oseberg Field area in the northern Viking Graben. The objectives of the sidetrack was to evaluate play of the Late Jurassic Draupne and Heather sands (Richards prospect) and to collect enough data to be able to make development plans based on this data.
    Operations and results
    Wildcat well 30/9-21 A was drilled with the semi-submersible installation Transocean Winner. It was sidetracked from 30/9-21 S at 1233 m on 4 May 2008 and drilled to a total depth of 4086 m in the Early Jurassic Drake Formation. On the last wire line run (VSI-VSP) at final TD the tool string became stuck after logging the second station at 4020 m. The run was aborted, the cable was disconnected and pulled out of the hole and the tool string was left in the hole. No fishing attempts were made. The well was drilled with Paratech oil based mud from kick-off to TD. Chromatographic analyses of mud filtrate from the well (PVT report) indicated that the base oil consist of mainly n-alkanes in the range C13 to C20.
    The well penetrated rocks of Tertiary, Cretaceous and Jurassic age. The well penetrated the target Lower Draupne at 3616.8 m, on prognosis and Upper Heather at 3670 m, 36 m deeper than prognosis, hitting poor quality turbidite sandstones with weak oil shows. Wire line logs proved the well to be water bearing.
    Three cores were cut in the Draupne and Heather Formation in the interval from 3650 m to 3825 m driller's depth. For all cores a shift of - 4 m relative to drillers depth was necessary to get a match with the loggers depth. No wire line fluid samples were taken, only MDT pressure points.
    The well was permanently abandoned on 15 June 2008 as a dry well with oil 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]
    1260.00
    4086.00

  • 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
    3650.0
    3667.4
    [m ]
    2
    3667.0
    3694.4
    [m ]
    3
    3798.0
    3824.6
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    71.3
    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
    3530.0
    [m]
    DC
    FUGRO
    3540.0
    [m]
    DC
    FUGRO
    3550.0
    [m]
    DC
    FUGRO
    3560.0
    [m]
    DC
    FUGRO
    3570.0
    [m]
    DC
    FUGRO
    3580.0
    [m]
    DC
    FUGRO
    3590.0
    [m]
    DC
    FUGRO
    3600.0
    [m]
    DC
    FUGRO
    3603.0
    [m]
    DC
    FUGRO
    3606.0
    [m]
    DC
    FUGRO
    3609.0
    [m]
    DC
    FUGRO
    3612.0
    [m]
    DC
    FUGRO
    3615.0
    [m]
    DC
    FUGRO
    3618.0
    [m]
    DC
    FUGRO
    3621.0
    [m]
    DC
    FUGRO
    3624.0
    [m]
    DC
    FUGRO
    3627.0
    [m]
    DC
    FUGRO
    3630.0
    [m]
    DC
    FUGRO
    3633.0
    [m]
    DC
    FUGRO
    3636.0
    [m]
    DC
    FUGRO
    3639.0
    [m]
    DC
    FUGRO
    3642.0
    [m]
    DC
    FUGRO
    3645.0
    [m]
    DC
    FUGRO
    3648.0
    [m]
    DC
    FUGRO
    3650.1
    [m]
    C
    FUGRO
    3653.2
    [m]
    C
    FUGRO
    3656.4
    [m]
    C
    FUGRO
    3659.4
    [m]
    C
    FUGRO
    3660.9
    [m]
    C
    FUGRO
    3663.7
    [m]
    C
    FUGRO
    3665.4
    [m]
    C
    FUGRO
    3668.9
    [m]
    C
    FUGRO
    3670.3
    [m]
    C
    FUGRO
    3671.9
    [m]
    C
    FUGRO
    3674.5
    [m]
    C
    FUGRO
    3677.7
    [m]
    C
    FUGRO
    3680.6
    [m]
    C
    FUGRO
    3683.6
    [m]
    C
    FUGRO
    3686.5
    [m]
    C
    FUGRO
    3689.5
    [m]
    C
    FUGRO
    3692.5
    [m]
    C
    FUGRO
    3694.3
    [m]
    C
    FUGRO
    3696.0
    [m]
    DC
    FUGRO
    3699.0
    [m]
    DC
    FUGRO
    3702.0
    [m]
    DC
    FUGRO
    3705.0
    [m]
    DC
    FUGRO
    3708.0
    [m]
    DC
    FUGRO
    3714.0
    [m]
    DC
    FUGRO
    3720.0
    [m]
    DC
    FUGRO
    3726.0
    [m]
    DC
    FUGRO
    3732.0
    [m]
    DC
    FUGRO
    3738.0
    [m]
    DC
    FUGRO
    3744.0
    [m]
    DC
    FUGRO
    3753.0
    [m]
    DC
    FUGRO
    3759.0
    [m]
    DC
    FUGRO
    3765.0
    [m]
    DC
    FUGRO
    3771.0
    [m]
    DC
    FUGRO
    3777.0
    [m]
    DC
    FUGRO
    3783.0
    [m]
    DC
    FUGRO
    3789.0
    [m]
    DC
    FUGRO
    3792.0
    [m]
    DC
    FUGRO
    3795.0
    [m]
    DC
    FUGRO
    3797.0
    [m]
    DC
    FUGRO
    3798.1
    [m]
    C
    FUGRO
    3801.9
    [m]
    C
    FUGRO
    3805.9
    [m]
    C
    FUGRO
    3809.9
    [m]
    C
    FUGRO
    3813.0
    [m]
    C
    FUGRO
    3816.7
    [m]
    C
    FUGRO
    3820.8
    [m]
    C
    FUGRO
    3824.4
    [m]
    C
    FUGRO
    3828.0
    [m]
    DC
    FUGRO
    3831.0
    [m]
    DC
    FUGRO
    3834.0
    [m]
    DC
    FUGRO
    3837.0
    [m]
    DC
    FUGRO
    3840.0
    [m]
    DC
    FUGRO
    3843.0
    [m]
    DC
    FUGRO
    3846.0
    [m]
    DC
    FUGRO
    3849.0
    [m]
    DC
    FUGRO
    3852.0
    [m]
    DC
    FUGRO
    3855.0
    [m]
    DC
    FUGRO
    3858.0
    [m]
    DC
    FUGRO
    3861.0
    [m]
    DC
    FUGRO
    3864.0
    [m]
    DC
    FUGRO
    3867.0
    [m]
    DC
    FUGRO
    3870.0
    [m]
    DC
    FUGRO
    3873.0
    [m]
    DC
    FUGRO
    3876.0
    [m]
    DC
    FUGRO
    3879.0
    [m]
    DC
    FUGRO
    3882.0
    [m]
    DC
    FUGRO
    3885.0
    [m]
    DC
    FUGRO
    3888.0
    [m]
    DC
    FUGRO
    3891.0
    [m]
    DC
    FUGRO
    3894.0
    [m]
    DC
    FUGRO
    3897.0
    [m]
    DC
    FUGRO
    3900.0
    [m]
    DC
    FUGRO
    3906.0
    [m]
    DC
    FUGRO
    3909.0
    [m]
    DC
    FUGRO
    3912.0
    [m]
    DC
    FUGRO
    3915.0
    [m]
    DC
    FUGRO
    3918.0
    [m]
    DC
    FUGRO
    3921.0
    [m]
    DC
    FUGRO
    3924.0
    [m]
    DC
    FUGRO
    3927.0
    [m]
    DC
    FUGRO
    3930.0
    [m]
    DC
    FUGRO
    3933.0
    [m]
    DC
    FUGRO
    3936.0
    [m]
    DC
    FUGRO
    3942.0
    [m]
    DC
    FUGRO
    3945.0
    [m]
    DC
    FUGRO
    3948.0
    [m]
    DC
    FUGRO
    3951.0
    [m]
    DC
    FUGRO
    3954.0
    [m]
    DC
    FUGRO
    3957.0
    [m]
    DC
    FUGRO
    3963.0
    [m]
    DC
    FUGRO
    3966.0
    [m]
    DC
    FUGRO
    3969.0
    [m]
    DC
    FUGRO
    3972.0
    [m]
    DC
    FUGRO
    3975.0
    [m]
    DC
    FUGRO
    3978.0
    [m]
    DC
    FUGRO
    3984.0
    [m]
    DC
    FUGRO
    3987.0
    [m]
    DC
    FUGRO
    3993.0
    [m]
    DC
    FUGRO
    3996.0
    [m]
    DC
    FUGRO
    4002.0
    [m]
    DC
    FUGRO
    4005.0
    [m]
    DC
    FUGRO
    4011.0
    [m]
    DC
    FUGRO
    4017.0
    [m]
    DC
    FUGRO
    4023.0
    [m]
    DC
    FUGRO
    4026.0
    [m]
    DC
    FUGRO
    4029.0
    [m]
    DC
    FUGRO
    4032.0
    [m]
    DC
    FUGRO
    4035.0
    [m]
    DC
    FUGRO
    4038.0
    [m]
    DC
    FUGRO
    4041.0
    [m]
    DC
    FUGRO
    4044.0
    [m]
    DC
    FUGRO
    4047.0
    [m]
    DC
    FUGRO
    4050.0
    [m]
    DC
    FUGRO
    4053.0
    [m]
    DC
    FUGRO
    4056.0
    [m]
    DC
    FUGRO
    4065.0
    [m]
    DC
    FUGRO
    4068.0
    [m]
    DC
    FUGRO
    4074.0
    [m]
    DC
    FUGRO
    4077.0
    [m]
    DC
    FUGRO
    4083.0
    [m]
    DC
    FUGRO
    4086.0
    [m]
    DC
    FUGRO

  • Lithostratigraphy

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CMR PEX ECS
    3598
    4065
    DSI AITGR
    3598
    4094
    LWD - ARC GR
    1322
    3602
    LWD - GVR ARC GR
    3602
    4086
    MDT
    3656
    3657
    VSP
    2234
    4080

  • 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
    INTERM.
    13 3/8
    2268.0
    17 1/2
    2275.0
    1.70
    LOT
    INTERM.
    9 5/8
    3601.0
    12 1/4
    3601.0
    1.60
    LOT
    OPEN HOLE
    4086.0
    8 1/2
    4086.0
    0.00
    LOT

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    1136
    1.39
    32.0
    Paratec
    1181
    1.39
    32.0
    Paratec
    1216
    1.39
    33.0
    Paratec
    1247
    1.39
    33.0
    Paratec
    1258
    1.39
    32.0
    Paratec
    1301
    1.41
    36.0
    Paratec
    1316
    1.45
    35.0
    Paratec
    1325
    1.45
    38.0
    Paratec
    1339
    1.45
    39.0
    Paratec
    1470
    1.45
    40.0
    Paratec
    1538
    1.45
    41.0
    Paratec
    1696
    1.45
    44.0
    Paratec
    1734
    1.47
    45.0
    Paratec
    1745
    1.47
    46.0
    Paratec
    1810
    1.47
    48.0
    Paratec
    1917
    1.47
    54.0
    Paratec
    2118
    1.47
    40.0
    Paratec
    2242
    1.47
    41.0
    Paratec
    2267
    1.39
    34.0
    Paratec
    2275
    1.49
    42.0
    Paratec
    2294
    1.39
    33.0
    Paratec
    2600
    1.39
    39.0
    Paratec
    2692
    1.39
    38.0
    Paratec
    2765
    1.39
    37.0
    Paratec
    2824
    1.39
    36.0
    Paratec
    3300
    1.39
    41.0
    Paratec
    3441
    1.39
    43.0
    Paratec
    3558
    1.39
    43.0
    Paratec
    3602
    1.41
    41.0
    Paratec
    3649
    1.30
    31.0
    Paratec
    3786
    1.30
    32.0
    Paratec
    3797
    1.30
    34.0
    Paratec
    3825
    1.30
    34.0
    Paratec
    3971
    1.30
    37.0
    Paratec
    4086
    1.30
    32.0
    Paratec

  • Pressure plots
    Pressure plots
    The pore pressure data is sourced from well logs if no other source is specified. In some wells where pore pressure logs do not exist, information from Drill stem tests and kicks have been used. The data has been reported to the NPD, and further processed and quality controlled by IHS Markit.
    Pressure plots
    Document name
    Document format
    Document size [MB]
    pdf
    0.22