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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34/4-8

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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.
    34/4-8
    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
    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
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    34/4-8
    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.
    Saga Petroleum ASA
    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.
    790-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.
    31
    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,
    22.05.1994
    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.
    21.06.1994
    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.
    21.06.1996
    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.
    31.10.2003
    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.
    DRY
    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.
    363.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3110.0
    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).
    3108.5
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    2.9
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    104
    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° 35' 4.02'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 10' 9.73'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6828333.19
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    455901.06
    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.
    1908

  • Wellbore history
    General
    Well 34/4-8 is located on the "Beta Terrace", a down faulted terrace northwest of the Snorre Block in the central part of the block. The main objective of well 34/4-8 was to test the presence of hydrocarbons and the reservoir quality of the Statfjord Formation on the Beta Terrace. The well should also test the presence of hydrocarbons in the Lunde Formation, improve depth conversion and seismic tie for the pre-Cretaceous levels in this previously undrilled structural element, and give indications on further prospectivity north-westwards in block 34/4.
    Operations and results
    Wildcat well 34/4-8 was spudded with the semi-submersible installation "Vildkat Explorer" on 22 May 1994 and drilled to TD at 3110 m in the Triassic Lunde Formation. Since possible shallow gas levels had been predicted, a 9 7/8" pilot hole was first drilled. No shallow gas was found. The well was drilled with spud mud and gel down to 1460 me and with KCl mud with a glycol additive from 1460 m to TD.
    The Nordland and Hordaland Groups were mainly silty claystones except for the sandy Utsira Formation, which came in at 1123 m. The Nordland and Hordaland Groups had a very high content of drilling gas (average 2-3%), but no signs of gas were seen on the logs. The Rogaland Group was penetrated at 1690 m, and consists of the Balder and Sele Formations. The Balder Formation was dominated by tuff interbedded with claystone. The Sele Formation consisted of silty claystones with traces of limestones. At 1838 m the Shetland Group was penetrated. The Shetland Group consisted predominantly of silty clay stone with some limestones and thin sandstone beds. The Cromer Knoll Group had marl as the main lithology. The marl was interbedded with silty claystones and sandstones. The Dunlin Group consisted of claystone interbedded with marl and minor sandstone beds. The Statfjord Formation was penetrated at 2799 m and consisted of sandstones alternating with shale/claystones. The Hegre Group proved to be generally alternating sandstones and claystones.
    Weak hydrocarbon shows were seen in the cuttings from 2210 m to 2490 m in the Shetland Group. The shows were seen in the sandstones and in the sandy parts of the claystones. There were bright yellow fluorescence, slow streaming moderate weak cut and yellow white residuum upon evaporation. No shows were seen in the sidewall cores. No hydrocarbons were found neither in the Statfjord nor the Lunde Formations. The only core attempted was in the Statfjord Formation but it jammed off and gave no recovery. No fluid samples were taken.
    The well was permanently abandoned as a dry well on 21 June 1994.
    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]
    510.00
    3110.00

  • 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
    498.0
    36
    500.0
    0.00
    LOT
    SURF.COND.
    13 3/8
    1445.0
    17 1/2
    1465.0
    1.66
    LOT
    INTERM.
    9 5/8
    2681.0
    12 1/2
    2693.0
    1.86
    LOT
    OPEN HOLE
    3110.0
    8 1/2
    3110.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    DPIL MAC ZDL CN DSL TTRM
    2650
    3108
    DPIL MAC ZDL GR TTRM
    1334
    2692
    FMT GR CHT
    2801
    3080
    HDIP GR
    2681
    3108
    MWD - DIR GR IND RES
    0
    499
    MWD - DIR GR IND RES
    1460
    2693
    MWD - DIR GR IND RES
    2693
    3108
    MWD - GR DPRS DIR
    499
    1460
    SWC GR
    1548
    2572
    SWC GR
    2681
    3108
    VSP
    2681
    3108

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.32

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    1.91

  • 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
    12.36

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    435
    1.51
    26.0
    DUMMY
    499
    1.12
    GEL MUD
    996
    1.17
    15.0
    GEL MUD
    1410
    1.17
    8.0
    GEL MUD
    1460
    1.26
    5.0
    GEL MUD
    2064
    1.59
    30.0
    DUMMY
    2179
    1.59
    27.0
    DUMMY
    2396
    1.59
    34.0
    DUMMY
    2485
    1.59
    29.0
    DUMMY
    2655
    1.59
    30.0
    DUMMY
    2693
    1.60
    32.0
    DUMMY
    2707
    1.60
    28.0
    DUMMY
    2791
    1.62
    27.0
    DUMMY
    2911
    1.62
    27.0
    DUMMY
    3110
    1.62
    23.0
    DUMMY

  • 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
    1020.0
    [m]
    DC
    1040.0
    [m]
    DC
    1060.0
    [m]
    DC
    1080.0
    [m]
    DC
    1100.0
    [m]
    DC
    1120.0
    [m]
    DC
    1140.0
    [m]
    DC
    1160.0
    [m]
    DC
    1180.0
    [m]
    DC
    1200.0
    [m]
    DC
    1220.0
    [m]
    DC
    1240.0
    [m]
    DC
    1260.0
    [m]
    DC
    1280.0
    [m]
    DC
    1310.0
    [m]
    DC
    1320.0
    [m]
    DC
    1340.0
    [m]
    DC
    1360.0
    [m]
    DC
    1380.0
    [m]
    DC
    1400.0
    [m]
    DC
    1420.0
    [m]
    DC
    1440.0
    [m]
    DC
    1460.0
    [m]
    DC
    1480.0
    [m]
    DC
    1500.0
    [m]
    DC
    1520.0
    [m]
    DC
    1540.0
    [m]
    DC
    1560.0
    [m]
    DC
    1580.0
    [m]
    DC
    1600.0
    [m]
    DC
    1620.0
    [m]
    DC
    1640.0
    [m]
    DC
    1660.0
    [m]
    DC
    1680.0
    [m]
    DC
    1700.0
    [m]
    DC
    1720.0
    [m]
    DC
    1740.0
    [m]
    DC
    1760.0
    [m]
    DC
    1780.0
    [m]
    DC
    1800.0
    [m]
    DC
    1820.0
    [m]
    DC
    1840.0
    [m]
    DC
    1860.0
    [m]
    DC
    1880.0
    [m]
    DC
    1900.0
    [m]
    DC
    1920.0
    [m]
    DC
    1940.0
    [m]
    DC
    1960.0
    [m]
    DC
    1980.0
    [m]
    DC
    2000.0
    [m]
    DC
    2020.0
    [m]
    DC
    2040.0
    [m]
    DC
    2060.0
    [m]
    DC
    2080.0
    [m]
    DC
    2100.0
    [m]
    DC
    2120.0
    [m]
    DC
    2140.0
    [m]
    DC
    2160.0
    [m]
    DC
    2420.0
    [m]
    DC
    2440.0
    [m]
    DC
    2460.0
    [m]
    DC
    2480.0
    [m]
    DC
    2500.0
    [m]
    DC
    2520.0
    [m]
    DC
    2540.0
    [m]
    DC
    2560.0
    [m]
    DC
    2580.0
    [m]
    DC
    2600.0
    [m]
    DC
    2620.0
    [m]
    DC
    2640.0
    [m]
    DC
    2665.0
    [m]
    DC
    2675.0
    [m]
    DC
    2685.0
    [m]
    DC
    2693.0
    [m]
    DC
    2700.0
    [m]
    DC
    2710.0
    [m]
    DC
    2720.0
    [m]
    DC
    2730.0
    [m]
    DC
    2740.0
    [m]
    DC
    2745.0
    [m]
    DC
    2755.0
    [m]
    DC
    2765.0
    [m]
    DC
    2774.0
    [m]
    DC
    2783.0
    [m]
    DC
    2792.0
    [m]
    DC
    2801.0
    [m]
    DC
    2919.0
    [m]
    DC
    2936.0
    [m]
    DC
    2945.0
    [m]
    DC
    2954.0
    [m]
    DC
    2963.0
    [m]
    DC
    2972.0
    [m]
    DC
    2981.0
    [m]
    DC
    2990.0
    [m]
    DC
    2999.0
    [m]
    DC
    3008.0
    [m]
    DC
    3017.0
    [m]
    DC
    3026.0
    [m]
    DC
    3035.0
    [m]
    DC