Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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01.11.2024 - 01:26
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33/5-1

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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.
    33/5-1
    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
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    33/5-1
    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.
    218-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.
    92
    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,
    19.07.1979
    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.
    18.10.1979
    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.
    18.10.1981
    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.
    18.05.2004
    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
    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.
    SHOWS
    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.
    NO
    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.
    339.5
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3829.0
    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).
    3822.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    7.2
    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 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.
    TEIST FM (INFORMAL)
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    61° 44' 46.1'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    1° 34' 57.4'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6846879.89
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    425144.48
    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.
    103

  • Wellbore history
    General
    The objective of the well, located on the Makrell horst on the northern margin of the East Shetland Basin, was to test two possible sandstone reservoirs of Triassic and Permo-Triassic age respectively. The first of these reservoirs was prognosed to be an Early Triassic massive sandstone reservoir. Correlation with the U.K. well 211/13-1 indicated that this sandstone could be divided into two main sequences both with increasing silt and clay content in the lower parts. These sands were thought to be deposited in a braided alluvial system. The second was prognosed to be Permo-Triassic fluvial sandstone similar to the higher reservoir but separated from it by lacustrine or lagoonal shales, marls and limestones. The well was planned to reach total depth below a seismic marker at approximately 3825 m.
    Well 33/5-1 is reference well for the Triassic Teist and Lomvi Formations.
    Operations and results
    Wildcat well 33/5-1 was spudded with the semi-submersible installation Treasure Seeker on 19 July 1979 and drilled to TD at 3829 m in the Early Triassic Teist Formation, interpreted to be close to the seismic "A" marker. A gas leakage from a shallow gas zone at 480 m to 490 m between the 20" and 30" casing was observed sporadically throughout drilling of the well. The leakage was stopped when the gas zone were squeezed off with cement during abandonment of the well. An 18 1/2" hole was first drilled to 1516 m. When pulling out of the hole the string got stuck at 1226 m and the well was sidetracked from 1019 m to 1071 m. Logs are from the sidetrack. Further drilling went without significant problems. The well was drilled with seawater/bentonite/CMC down to 1540 m. Diesel and lubricants were added to the mud when attempting to free the stuck pipe. A lignosulfonite/lignite mud was used from 1540 m to TD.
    A sequence of interbedded limestones of Early Tertiary to Late Cretaceous age (Late/Middle Paleocene-Maastrichtian) revealed fair hydrocarbon shows when penetrated. Wire line log interpretations and RFT runs found, however, these limestones to be poor reservoir rocks and to contain residual hydrocarbons only. The Jurassic was absent in the well. Early Cretaceous sediments (Albian age Rødby Formation) were found resting unconformably on the Triassic Lunde Formation. Well 33/5-1 penetrated a 1137 m thick sequence of Triassic rocks. Good sandstone reservoirs were found, but no significant hydrocarbon shows were encountered. A single conventional core was cut from 3066 m to 3076.4 m in the Lunde Formation. Four RFT runs were made for pressure recordings and evaluation of the Lower Tertiary-Upper Cretaceous limestones and the Triassic sandstones. For the Lower Tertiary-Upper Cretaceous sequence, no reliable data were obtained due to tight formations or tool seal failure. The RFT recordings for the Triassic sandstones gave a pressure gradient of 0.11 bar/m (0.48 psi/ft) indicating water-bearing reservoir. Only mud filtrate was recovered from RFT samples taken at 1675 m and 2747.5 m.
    The well was permanently abandoned as dry on 18 October 1979.
    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]
    427.00
    3822.00

  • 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
    3066.0
    3076.5
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    10.5
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 3066-3068m
    Core photo at depth: 3068-3071m
    Core photo at depth: 3071-3074m
    Core photo at depth: 3074-3076m
    Core photo at depth:  
    3066-3068m
    3068-3071m
    3071-3074m
    3074-3076m

  • 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
    427.0
    36
    427.0
    0.00
    LOT
    SURF.COND.
    20
    583.0
    26
    590.0
    1.22
    LOT
    INTERM.
    16
    858.0
    22
    875.0
    1.31
    LOT
    INTERM.
    13 3/8
    1526.0
    18 1/2
    1540.0
    1.61
    LOT
    INTERM.
    9 5/8
    2599.0
    12 1/4
    2614.0
    0.00
    LOT
    OPEN HOLE
    3829.0
    8 1/2
    3829.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    BHG
    426
    587
    BHG
    582
    650
    CBL VDL
    364
    1527
    CST
    1619
    2606
    CST
    1619
    2606
    CST
    2616
    2900
    CST
    2623
    3008
    CST
    2738
    3376
    CST
    3399
    3829
    DLL MSFL GR
    1527
    1781
    FDC CNL GR
    1527
    1780
    FDC CNL GR
    2599
    3829
    FDC GR
    582
    1538
    FDC GR
    1720
    2614
    HDT
    1531
    2556
    HDT
    2601
    3826
    ISF SONIC GR
    426
    3829
    RFT
    1636
    1675
    RFT
    1648
    1703
    RFT
    2747
    2858
    RFT
    2878
    3244
    TEMPERATURE
    290
    2566
    VSP
    427
    2608
    VSP
    1200
    3700

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.53

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    7.74
    pdf
    0.67
    pdf
    0.93

  • 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
    13.57

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    685
    1.30
    57.0
    spud mud
    874
    1.32
    54.0
    water mud
    1470
    1.13
    55.0
    water mud
    2613
    1.50
    54.0
    water mud
    3823
    1.56
    66.0
    water mud

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1000.0
    [m]
    DC
    GEOCH
    1030.0
    [m]
    DC
    GEOCH
    1060.0
    [m]
    DC
    GEOCH
    1090.0
    [m]
    DC
    GEOCH
    1120.0
    [m]
    DC
    GEOCH
    1150.0
    [m]
    DC
    GEOCH
    1180.0
    [m]
    DC
    GEOCH
    1210.0
    [m]
    DC
    GEOCH
    1240.0
    [m]
    DC
    GEOCH
    1270.0
    [m]
    DC
    GEOCH
    1300.0
    [m]
    DC
    GEOCH
    1330.0
    [m]
    DC
    GEOCH
    1360.0
    [m]
    DC
    GEOCH
    1390.0
    [m]
    DC
    GEOCH
    1420.0
    [m]
    DC
    GEOCH
    1450.0
    [m]
    DC
    GEOCH
    1480.0
    [m]
    DC
    GEOCH
    1510.0
    [m]
    DC
    GEOCH
    1540.0
    [m]
    DC
    GEOCH
    1570.0
    [m]
    DC
    GEOCH
    1600.0
    [m]
    DC
    GEOCH
    1630.0
    [m]
    DC
    GEOCH
    1630.0
    [m]
    DC
    RRI
    1650.0
    [m]
    DC
    RRI
    1660.0
    [m]
    DC
    GEOCH
    1670.0
    [m]
    DC
    RRI
    1690.0
    [m]
    DC
    GEOCH
    1690.0
    [m]
    DC
    RRI
    1710.0
    [m]
    DC
    RRI
    1730.0
    [m]
    DC
    RRI
    1750.0
    [m]
    DC
    RRI
    1770.0
    [m]
    DC
    RRI
    1790.0
    [m]
    DC
    RRI
    1815.0
    [m]
    DC
    RRI
    1830.0
    [m]
    DC
    RRI
    1850.0
    [m]
    DC
    RRI
    1875.0
    [m]
    DC
    RRI
    1890.0
    [m]
    DC
    RRI
    1910.0
    [m]
    DC
    RRI
    1930.0
    [m]
    DC
    RRI
    1945.0
    [m]
    DC
    RRI
    1965.0
    [m]
    DC
    RRI
    1985.0
    [m]
    DC
    RRI
    2005.0
    [m]
    DC
    RRI
    2025.0
    [m]
    DC
    RRI
    2040.0
    [m]
    DC
    RRI
    2060.0
    [m]
    DC
    RRI
    2080.0
    [m]
    DC
    RRI
    2100.0
    [m]
    DC
    RRI
    2120.0
    [m]
    DC
    RRI
    2142.0
    [m]
    DC
    RRI
    2162.0
    [m]
    DC
    RRI
    2180.0
    [m]
    DC
    RRI
    2200.0
    [m]
    DC
    RRI
    2220.0
    [m]
    DC
    RRI
    2240.0
    [m]
    DC
    RRI
    2260.0
    [m]
    DC
    RRI
    2280.0
    [m]
    DC
    RRI
    2302.0
    [m]
    DC
    RRI
    2320.0
    [m]
    DC
    RRI
    2342.0
    [m]
    DC
    RRI
    2360.0
    [m]
    DC
    RRI
    2380.0
    [m]
    DC
    RRI
    2400.0
    [m]
    DC
    RRI
    2418.0
    [m]
    DC
    RRI
    2440.0
    [m]
    DC
    RRI
    2460.0
    [m]
    DC
    RRI
    2480.0
    [m]
    DC
    RRI
    2500.0
    [m]
    DC
    RRI
    2520.0
    [m]
    DC
    RRI
    2542.0
    [m]
    DC
    RRI
    2560.0
    [m]
    DC
    RRI
    2578.0
    [m]
    DC
    RRI
    2600.0
    [m]
    DC
    RRI
    2620.0
    [m]
    DC
    RRI
    2640.0
    [m]
    DC
    RRI
    2670.0
    [m]
    DC
    RRI
    2690.0
    [m]
    DC
    RRI
    2710.0
    [m]
    DC
    RRI