Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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26.11.2024 - 01:27
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34/10-43 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.
    34/10-43 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.
    34/10-43
    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.
    993-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.
    46
    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,
    25.02.2001
    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.
    11.04.2001
    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.
    11.04.2003
    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.
    19.10.2006
    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
    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.
    EARLY 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.
    STATFJORD GP
    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.
    139.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    5725.0
    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).
    3220.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    101
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    121
    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 TRIASSIC
    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.
    LUNDE FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    61° 6' 30.78'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 2' 59.76'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6775410.84
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    448788.97
    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.
    4247

  • Wellbore history
    General
    Wildcat well 34/10-43 S was drilled in a structure in the south-eastern part of the Tampen Spur area, on one of the westerly-rotated fault blocks east of the Beta Ridge. The structure is eroded at BCU level, successively deeper towards the east, and is limited by east-west faults towards north. Planned well trajectory was highly deviated in order to test several objectives in one well. Primary objective was to test the potential for hydrocarbons in Middle Jurassic sandstones of the Statfjord Formation. The secondary objective was the Brent Group, Cook and Lunde Formation. Tertiary objectives were to penetrate Paleocene in an optimal position for exploring the lowermost part for sand/hydrocarbons (Ty Formation) and at TD, a prospect of the Late Jurassic, Munin Member. The planned TD of the well was at 4505 m (2565 m TVD RKB) with an inclination of 67 deg .
    Operations and results
    Well 34/10-43 S was spudded with the semi-submersible installation Transocean Wildcat on 25 February 2001 and drilled deviated through Triassic sediments of the Lunde Formation as the oldest penetrated sediments, to TD at 5725 m (3219.9 m TVD RKB) in the Early Cretaceous Cromer Knoll Group. The drilling progress was very good down to the Lunde Formation. After logging of the reservoir sections in the Middle-Early Jurassic and Triassic objectives, the drilling continued to final tertiary objective in the Late Jurassic prospect in the Munin Formation. This part was significantly slower to drill, caused by places of tight hole and also because of hard lithology. Several bits had to be implemented before TD was reached with an inclination of approximately 101 deg . The well was drilled with KCl mud down to 709 m, and with oil based mud (Versavert) from 709 m to TD.
    There were no sands in the Paleocene prospect,  and the Shetland Group was therefore encountered more than 100 m shallower than expected. The Brent prospect was much more eroded at the well trajectory than was prognosed. It was thus only partly penetrated and was interpreted as water bearing. Also the Cook Formation was water bearing, and this Formation was penetrated in an optimal position in the structure. Eight m (3 m TVD) of hydrocarbons were identified on logs in the upper Statfjord- (Nansen) Formation, in a reservoir with very good properties. The OWC was at 2848 m TVD MSL. Pressure points indicated an oil zone with a density of approx. 0.05 bar/m. Middle/Lower Statfjord and the Lunde Formations showed yet another water zone. The extended part of the well penetrated Munin sands, exactly as prognosed. The sands had very good reservoir potential, yet without hydrocarbons. The well gave very good seismic reflectors in this complex sub-basin.
    No conventional cores were cut and no fluid samples were taken in the well.
    The well was permanently abandoned on 11 April 2001 as a minor oil 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]
    720.00
    5725.00

  • 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
    223.0
    36
    228.0
    0.00
    LOT
    SURF.COND.
    20
    709.0
    26
    716.0
    1.55
    LOT
    INTERM.
    13 3/8
    2128.0
    17 1/2
    2138.0
    1.95
    LOT
    OPEN HOLE
    5725.0
    8 1/2
    5725.0
    1.84
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    MWD LWD - GR RES DIR
    140
    5720
    PEX AIT-H MDT
    3133
    4476

  • Lithostratigraphy

  • 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
    2.55
    .PDF
    0.76

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    1322
    1.23
    15.0
    GLYDRILL
    2141
    1.45
    21.0
    GLYDRILL
    2276
    1.62
    DUMMY
    3161
    1.72
    51.0
    VERSAVERT
    3161
    1.67
    52.0
    VERSAVERT
    4490
    1.67
    52.0
    VERSAVERT
    4562
    1.70
    49.0
    VERSAVERT
    5077
    1.72
    46.0
    VERSAVERT
    5503
    1.72
    46.0
    VERSAVERT
    5725
    1.72
    54.0
    VERSAVERT

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    3150.0
    [m]
    DC
    GEOSTR
    3160.0
    [m]
    DC
    GEOSTR
    3169.0
    [m]
    DC
    GEOSTR
    3176.0
    [m]
    DC
    GEOSTR
    3182.0
    [m]
    DC
    GEOSTR
    3186.0
    [m]
    DC
    GEOSTR
    3192.0
    [m]
    DC
    GEOSTR
    3197.0
    [m]
    DC
    GEOSTR
    3203.0
    [m]
    DC
    GEOSTR
    3209.0
    [m]
    DC
    GEOSTR
    3215.0
    [m]
    DC
    GEOSTR
    3221.0
    [m]
    DC
    GEOSTR
    4555.0
    [m]
    DC
    GEOSTR
    4600.0
    [m]
    DC
    GEOSTR
    4620.0
    [m]
    DC
    GEOSTR
    4640.0
    [m]
    DC
    GEOSTR
    4660.0
    [m]
    DC
    GEOSTR
    4680.0
    [m]
    DC
    GEOSTR
    4700.0
    [m]
    DC
    GEOSTR
    4720.0
    [m]
    DC
    GEOSTR
    4740.0
    [m]
    DC
    GEOSTR
    4760.0
    [m]
    DC
    GEOSTR
    4780.0
    [m]
    DC
    GEOSTR
    4800.0
    [m]
    DC
    GEOSTR
    4820.0
    [m]
    DC
    GEOSTR
    4840.0
    [m]
    DC
    GEOSTR
    4860.0
    [m]
    DC
    GEOSTR
    4880.0
    [m]
    DC
    GEOSTR
    4900.0
    [m]
    DC
    GEOSTR
    4910.0
    [m]
    DC
    GEOSTR
    4940.0
    [m]
    DC
    GEOSTR
    4960.0
    [m]
    DC
    GEOSTR
    4980.0
    [m]
    DC
    GEOSTR
    5000.0
    [m]
    DC
    GEOSTR
    5020.0
    [m]
    DC
    GEOSTR
    5040.0
    [m]
    DC
    GEOSTR
    5060.0
    [m]
    DC
    GEOSTR
    5080.0
    [m]
    DC
    GEOSTR
    5100.0
    [m]
    DC
    GEOSTR
    5120.0
    [m]
    DC
    GEOSTR
    5140.0
    [m]
    DC
    GEOSTR
    5160.0
    [m]
    DC
    GEOSTR
    5180.0
    [m]
    DC
    GEOSTR
    5200.0
    [m]
    DC
    GEOSTR
    5230.0
    [m]
    DC
    GEOSTR
    5240.0
    [m]
    DC
    GEOSTR
    5260.0
    [m]
    DC
    GEOSTR
    5280.0
    [m]
    DC
    GEOSTR
    5300.0
    [m]
    DC
    GEOSTR
    5330.0
    [m]
    DC
    GEOSTR
    5350.0
    [m]
    DC
    GEOSTR
    5359.0
    [m]
    DC
    GEOSTR
    5368.0
    [m]
    DC
    GEOSTR
    5377.0
    [m]
    DC
    GEOSTR
    5395.0
    [m]
    DC
    GEOSTR
    5404.0
    [m]
    DC
    GEOSTR
    5413.0
    [m]
    DC
    GEOSTR
    5422.0
    [m]
    DC
    GEOSTR
    5434.0
    [m]
    DC
    GEOSTR
    5440.0
    [m]
    DC
    GEOSTR
    5449.0
    [m]
    DC
    GEOSTR
    5464.0
    [m]
    DC
    GEOSTR
    5473.0
    [m]
    DC
    GEOSTR
    5479.0
    [m]
    DC
    GEOSTR
    5491.0
    [m]
    DC
    GEOSTR
    5500.0
    [m]
    DC
    GEOSTR
    5515.0
    [m]
    DC
    GEOSTR
    5521.0
    [m]
    DC
    GEOSTR
    5533.0
    [m]
    DC
    GEOSTR
    5539.0
    [m]
    DC
    GEOSTR
    5548.0
    [m]
    DC
    GEOSTR
    5560.0
    [m]
    DC
    GEOSTR
    5572.0
    [m]
    DC
    GEOSTR
    5584.0
    [m]
    DC
    GEOSTR
    5596.0
    [m]
    DC
    GEOSTR
    5602.0
    [m]
    DC
    GEOSTR
    5618.0
    [m]
    DC
    GEOSTR
    5626.0
    [m]
    DC
    GEOSTR
    5638.0
    [m]
    DC
    GEOSTR
    5644.0
    [m]
    DC
    GEOSTR
    5655.0
    [m]
    DC
    GEOSTR
    5662.0
    [m]
    DC
    GEOSTR
    5674.0
    [m]
    DC
    GEOSTR
    5680.0
    [m]
    DC
    GEOSTR
    5692.0
    [m]
    DC
    GEOSTR
    5698.0
    [m]
    DC
    GEOSTR
    5704.0
    [m]
    DC
    GEOSTR
    5710.0
    [m]
    DC
    GEOSTR
    5716.0
    [m]
    DC
    GEOSTR
    5722.0
    [m]
    DC
    GEOSTR
    5725.0
    [m]
    DC
    GEOSTR