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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33/9-19 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.
    33/9-19 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
    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.
    33/9-19
    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.
    Den norske stats oljeselskap a.s
    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.
    848-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.
    25
    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,
    29.06.1996
    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.
    23.07.1996
    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.
    23.07.1998
    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.
    01.07.2004
    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.
    APPRAISAL
    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.
    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.
    ETIVE 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.
    RANNOCH FM
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    25.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    304.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3197.0
    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).
    3061.0
    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.
    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.
    STATFJORD GP
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    61° 28' 33.56'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    1° 59' 50.6'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6816380.31
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    446585.05
    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.
    2830

  • Wellbore history
    General
    Well 33/9-19 S is situated in the Tampen Spur area. The well targeted the Statfjord Nord Nordøst Segment at the north-eastern extension of the Statfjord North Field structure in blocks 33/9 and 34/7. The objective was to prove the minimum economical recoverable reserves and the most likely oil water contact in the Brent Group.
    Operations and results
    The 33/9-19 S well was spudded on the 29 of June 1996, using the semi-submersible installation "Transocean Wildcat". The well was drilled in a north-western direction to TD at 3197 m in the Early Jurassic Statfjord Formation. A pilot hole was drilled to 450 m. No shallow gas was recorded. The 36" and 17 1/2" sections were drilled with sea water and swept clean with bentonite mud. The 12 1/4" hole section was drilled with Ancho-2000 mud and the 8 1/2" hole section was drilled with Ancovert Oil based mud.
    The target Base Cretaceous/Top Brent was reached at 2689.0 m (2646.8 m TVD RKB), 28 m shallower than prognosed. Sandstone in the Brent Group was oil filled from top down to claystone at 2811 m. Drilling continued towards the planned TD in Dunlin Group with an inclination of 35°. After having reached this TD, it was decided to continue drilling in order to investigate the Statfjord Formation reservoir characteristics and to improve the mapping of the Brent and Dunlin Groups. The inclination stayed at approximately 29.5° to final TD at 3197 m (3061.5 m TVD RKB). Top Statfjord Formation, which was water wet, came in at 3122 m (2996 m TVD RKB), 19 m TVD shallower than prognosed.
    One 90 ft core was cut from 2709 to 2727 m (100% recovery). The core jammed off after 18 m during coring of a calcite cemented sandstone interval. The core consisted of 100% HC filled Brent Group sandstone. MDT samples were recovered from depth 2701 m.
    The well 33/9-19 S was plugged back for side-tracking on 23 July 1996. It is classified as an oil discovery on
    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]
    780.00
    3197.00

  • 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
    2709.0
    2727.2
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    18.2
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 2709-2714m
    Core photo at depth: 2714-2719m
    Core photo at depth: 2719-2714m
    Core photo at depth: 2724-2727m
    Core photo at depth:  
    2709-2714m
    2714-2719m
    2719-2714m
    2724-2727m

  • 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
    390.0
    36
    392.0
    0.00
    LOT
    INTERM.
    13 3/8
    758.0
    17 1/2
    760.0
    1.58
    LOT
    INTERM.
    9 5/8
    1951.0
    12 1/4
    1953.0
    1.85
    LOT
    OPEN HOLE
    3197.0
    8 1/2
    3197.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    AS GR AMS
    1951
    3192
    DIL GR AMS
    1951
    3185
    LDL CNL GR AMS
    1951
    3165
    MDT GR
    2692
    2797
    MWD - DPR II
    329
    3197
    VSP
    832
    2635

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.46

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    0.50

  • 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
    14.70

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    450
    1.03
    DUMMY
    1220
    1.22
    DUMMY
    1900
    1.50
    DUMMY
    1956
    1.50
    24.0
    ANCO 2000
    2305
    1.62
    40.0
    ANCO VERT
    2709
    1.62
    42.0
    ANCO VERT
    3197
    1.62
    39.0
    ANCO VERT

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    2651.0
    [m]
    DC
    UOS
    2660.0
    [m]
    DC
    UOS
    2669.0
    [m]
    DC
    UOS
    2675.0
    [m]
    DC
    UOS
    2684.0
    [m]
    DC
    UOS
    2689.0
    [m]
    SWC
    UOS
    2691.0
    [m]
    SWC
    UOS
    2696.0
    [m]
    DC
    UOS
    2697.0
    [m]
    SWC
    UOS
    2699.0
    [m]
    DC
    UOS
    2719.5
    [m]
    SWC
    UOS
    2722.9
    [m]
    SWC
    UOS
    2726.5
    [m]
    SWC
    UOS
    2736.0
    [m]
    DC
    UOS
    2765.0
    [m]
    DC
    UOS
    2774.0
    [m]
    DC
    UOS
    2792.0
    [m]
    DC
    SWC
    2795.0
    [m]
    DC
    UOS
    2801.0
    [m]
    DC
    UOS
    2810.0
    [m]
    DC
    UOS
    2816.0
    [m]
    SWC
    UOS
    2822.0
    [m]
    DC
    UOS
    2828.0
    [m]
    DC
    UOS
    2837.0
    [m]
    DC
    UOS
    2849.0
    [m]
    DC
    UOS
    2855.0
    [m]
    DC
    UOS
    2873.0
    [m]
    DC
    UOS
    2885.0
    [m]
    DC
    UOS
    2897.0
    [m]
    DC
    UOS
    2906.0
    [m]
    DC
    UOS
    2915.0
    [m]
    DC
    UOS
    2924.0
    [m]
    DC
    UOS
    2933.0
    [m]
    DC
    UOS
    2942.0
    [m]
    DC
    UOS
    2947.0
    [m]
    DC
    UOS
    2948.0
    [m]
    DC
    UOS
    2957.0
    [m]
    DC
    UOS
    2966.0
    [m]
    DC
    UOS
    2975.0
    [m]
    DC
    UOS
    2984.0
    [m]
    DC
    UOS
    2993.0
    [m]
    DC
    UOS
    3002.0
    [m]
    DC
    UOS
    3011.0
    [m]
    DC
    UOS
    3020.0
    [m]
    DC
    UOS
    3029.0
    [m]
    DC
    UOS
    3038.0
    [m]
    DC
    UOS
    3047.0
    [m]
    DC
    UOS
    3056.0
    [m]
    DC
    UOS
    3065.0
    [m]
    DC
    UOS
    3074.0
    [m]
    DC
    UOS
    3083.0
    [m]
    DC
    UOS
    3092.0
    [m]
    DC
    UOS
    3101.0
    [m]
    DC
    UOS
    3110.0
    [m]
    DC
    UOS
    3119.0
    [m]
    DC
    UOS
    3122.0
    [m]
    DC
    UOS
    3131.0
    [m]
    DC
    UOS
    3132.0
    [m]
    SWC
    UOS
    3140.0
    [m]
    DC
    UOS
    3152.0
    [m]
    DC
    UOS
    3181.0
    [m]
    DC
    UOS
    3182.0
    [m]
    DC
    UOS