Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
sodir.no    Norsk
sodir.no          Norsk
25.11.2024 - 01:30
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30/9-20 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.
    30/9-20 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
    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.
    30/9-20
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    NH-9356-118/NH-9356-318
    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.
    Norsk Hydro Produksjon 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.
    1028-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.
    33
    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,
    09.01.2002
    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.
    11.02.2002
    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.
    11.02.2004
    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.
    27.02.2004
    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
    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
    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.
    TARBERT FM
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    24.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    101.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3124.0
    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).
    3096.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    16.3
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    125
    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° 19' 1.67'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 48' 3.38'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6686903.78
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    489002.73
    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.
    4463

  • Wellbore history
    General
    The well 30/9-20S was an exploration well, located in the Oseberg Sør field area, in block 30/9 on the R prospect of the PL104 Oseberg Sør Unit. The main objectives of the well was to prove oil and/or gas in The Brent
    deltaic sands of the Tarbert Formation, and additional potential within the Ness and Oseberg-Rannoch-Etive Formations, and to confirm the seismic interpretation. The R prospect is located between the K-west and the Omega structures.
    Operations and results
    Well 30/9-20S was spudded with the semi-submersible installation Transocean Arctic on 9 January 2002 and reached a total depth of 3124 m (3096 m TVD) in the Early Jurassic Drake Formation. The well was drilled with spud mud down to 400 m, with KCl/Polymer mud from 400 m to 870 m, with KCl/Polymer/Glycol mud from 870 m to 1297 m, and with Versavert oil based mud from 1297 m to TD.
    The Viking Group was encountered at 2750 m with top Intra Heather Formation Sandstone at 2751 m (2722 m TVD). A total gross hydrocarbon column of 65.8 m TVD was found in Intra Heather Formation Sandstone and in the Tarbert Formation, of this the lower 10.8 m is in the Tarbert Formation. A probable OWC was identified at 2817 m (2787.8 m TVD). The gross oil column was separated in two independent zones separated by a calcite barrier at ca 2796 m. A pressure barrier (0.5 bar) was interpreted internally between the two oil zones. The Intra Heather Formation Sandstone represents a poor, low permeability reservoir while Tarbert represents fair reservoir quality.
    A total of 72.65 m core was recovered from 2791 m to 2864 m over the major sandstone interval. The core shows a homogeneous, generally fine-grained sand sequence that is both silica and calcareous cemented. MDT fluid samples were taken in the oil zone at 2766.5 m and 2807 m, and in the water zone at 2868 m. Analyses on the rig as well as later geochemical analyses on shore showed that the samples were of good quality, not significantly affected by mud contamination.
    The well was permanently abandoned as an oil discovery on 11 February 2002.
    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]
    425.00
    3123.00

  • 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
    2791.0
    2826.5
    [m ]
    2
    2826.5
    2863.7
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    72.7
    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
    425.0
    [m]
    DC
    GEOSTR
    450.0
    [m]
    DC
    GEOSTR
    475.0
    [m]
    DC
    GEOSTR
    500.0
    [m]
    DC
    GEOSTR
    525.0
    [m]
    DC
    GEOSTR
    550.0
    [m]
    DC
    GEOSTR
    575.0
    [m]
    DC
    GEOSTR
    600.0
    [m]
    DC
    GEOSTR
    625.0
    [m]
    DC
    GEOSTR
    650.0
    [m]
    DC
    GEOSTR
    675.0
    [m]
    DC
    GEOSTR
    700.0
    [m]
    DC
    GEOSTR
    725.0
    [m]
    DC
    GEOSTR
    750.0
    [m]
    DC
    GEOSTR
    775.0
    [m]
    DC
    GEOSTR
    800.0
    [m]
    DC
    GEOSTR
    825.0
    [m]
    DC
    GEOSTR
    850.0
    [m]
    DC
    GEOSTR
    875.0
    [m]
    DC
    GEOSTR
    900.0
    [m]
    DC
    GEOSTR
    925.0
    [m]
    DC
    GEOSTR
    950.0
    [m]
    DC
    GEOSTR
    975.0
    [m]
    DC
    GEOSTR
    1000.0
    [m]
    DC
    GEOSTR
    1025.0
    [m]
    DC
    GEOSTR
    1050.0
    [m]
    DC
    GEOSTR
    1075.0
    [m]
    DC
    GEOSTR
    1100.0
    [m]
    DC
    GEOSTR
    1125.0
    [m]
    DC
    GEOSTR
    1150.0
    [m]
    DC
    GEOSTR
    1175.0
    [m]
    DC
    GEOSTR
    1200.0
    [m]
    DC
    GEOSTR
    1225.0
    [m]
    DC
    GEOSTR
    1250.0
    [m]
    DC
    GEOSTR
    1275.0
    [m]
    DC
    GEOSTR
    1300.0
    [m]
    DC
    GEOSTR
    1325.0
    [m]
    DC
    GEOSTR
    1350.0
    [m]
    DC
    GEOSTR
    1375.0
    [m]
    DC
    GEOSTR
    1400.0
    [m]
    DC
    GEOSTR
    1425.0
    [m]
    DC
    GEOSTR
    1450.0
    [m]
    DC
    GEOSTR
    1475.0
    [m]
    DC
    GEOSTR
    1500.0
    [m]
    DC
    GEOSTR
    1525.0
    [m]
    DC
    GEOSTR
    1550.0
    [m]
    DC
    GEOSTR
    1575.0
    [m]
    DC
    GEOSTR
    1600.0
    [m]
    DC
    GEOSTR
    1625.0
    [m]
    DC
    GEOSTR
    1650.0
    [m]
    DC
    GEOSTR
    1675.0
    [m]
    DC
    GEOSTR
    1700.0
    [m]
    DC
    GEOSTR
    1725.0
    [m]
    DC
    GEOSTR
    1750.0
    [m]
    DC
    GEOSTR
    1775.0
    [m]
    DC
    GEOSTR
    1800.0
    [m]
    DC
    GEOSTR
    1825.0
    [m]
    DC
    GEOSTR
    1850.0
    [m]
    DC
    GEOSTR
    1875.0
    [m]
    DC
    GEOSTR
    1900.0
    [m]
    DC
    GEOSTR
    1925.0
    [m]
    DC
    GEOSTR
    1950.0
    [m]
    DC
    GEOSTR
    1975.0
    [m]
    DC
    GEOSTR
    2000.0
    [m]
    DC
    GEOSTR
    2025.0
    [m]
    DC
    GEOSTR
    2050.0
    [m]
    DC
    GEOSTR
    2075.0
    [m]
    DC
    GEOSTR
    2100.0
    [m]
    DC
    GEOSTR
    2125.0
    [m]
    DC
    GEOSTR
    2150.0
    [m]
    DC
    GEOSTR
    2175.0
    [m]
    DC
    GEOSTR
    2200.0
    [m]
    DC
    GEOSTR
    2225.0
    [m]
    DC
    GEOSTR
    2250.0
    [m]
    DC
    GEOSTR
    2275.0
    [m]
    DC
    GEOSTR
    2310.0
    [m]
    DC
    GEOSTR
    2340.0
    [m]
    DC
    GEOSTR
    2370.0
    [m]
    DC
    GEOSTR
    2390.0
    [m]
    DC
    GEOSTR
    2610.0
    [m]
    DC
    GEOSTR
    2625.0
    [m]
    DC
    GEOSTR
    2631.0
    [m]
    DC
    GEOSTR
    2637.0
    [m]
    DC
    GEOSTR
    2643.0
    [m]
    DC
    GEOSTR
    2649.0
    [m]
    DC
    GEOSTR
    2655.0
    [m]
    DC
    GEOSTR
    2661.0
    [m]
    DC
    GEOSTR
    2667.0
    [m]
    DC
    GEOSTR
    2673.0
    [m]
    DC
    GEOSTR
    2679.0
    [m]
    DC
    GEOSTR
    2685.0
    [m]
    DC
    GEOSTR
    2691.0
    [m]
    DC
    GEOSTR
    2697.0
    [m]
    DC
    GEOSTR
    2703.0
    [m]
    DC
    GEOSTR
    2709.0
    [m]
    DC
    GEOSTR
    2715.0
    [m]
    DC
    GEOSTR
    2721.0
    [m]
    DC
    GEOSTR
    2727.0
    [m]
    DC
    GEOSTR
    2733.0
    [m]
    DC
    GEOSTR
    2739.0
    [m]
    DC
    GEOSTR
    2745.0
    [m]
    DC
    GEOSTR

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.41

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    2.72

  • Documents – reported by the production licence (period for duty of secrecy expired)
    Documents – reported by the production licence (period for duty of secrecy expired)
    Document name
    Document format
    Document size [MB]
    .pdf
    2.84
    .pdf
    1.55

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    AIT IPLT
    2362
    3124
    GR DSI OBMI
    2000
    3124
    GR MDT
    2746
    2934
    GR MSCT
    747
    2975
    GR VSP
    2040
    3124
    MWD - PP CDR
    125
    2369
    MWD - RAB VPP ADN
    2369
    3124

  • 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
    198.0
    36
    200.0
    0.00
    LOT
    INTERM.
    20
    398.0
    26
    400.0
    1.51
    LOT
    LINER
    16
    621.0
    20
    630.0
    0.00
    LOT
    INTERM.
    13 3/8
    1291.0
    17 1/2
    1297.0
    1.68
    LOT
    INTERM.
    9 5/8
    2362.0
    12 1/4
    2369.0
    1.60
    LOT
    OPEN HOLE
    3124.0
    8 1/2
    3124.0
    0.00
    LOT

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    198
    1.03
    WATER BASED
    400
    1.50
    WATER BASED
    600
    1.30
    20.0
    WATER BASED
    623
    1.30
    20.0
    WATER BASED
    1297
    1.21
    15.0
    WATER BASED
    1585
    1.45
    36.0
    OIL BASED
    1596
    1.45
    35.0
    OIL BASED
    2369
    1.45
    37.0
    OIL BASED
    2370
    1.30
    31.0
    OIL BASED
    2864
    1.30
    28.0
    OIL BASED
    3124
    1.30
    28.0
    OIL BASED

  • 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
    0.23