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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34/7-27

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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.
    34/7-27
    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.
    34/7-27
    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.
    Mobil Exploration Norway INC
    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.
    933-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.
    37
    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,
    01.09.1998
    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.
    07.10.1998
    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.
    07.10.2000
    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.
    18.12.2002
    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.
    311.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3000.0
    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).
    3000.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    2.48
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    103
    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.
    61° 29' 32.09'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 0' 21'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6818184.41
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    447062.53
    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.
    3214

  • Wellbore history
    General
    Well 34/7-27 was drilled in the northwestern corner of block 34/7, north of the Sygna and Statfjord North fields. The project was a joint operation involving three licence groups, PL 089, PL 206, and PL 037.
    The prospect was the Nordis Nord prospect, which was located immediately to the north of, and in a down flank position from, the Sygna (Nordis) discovery made in wells 33/9-19 S&A (PL 037). The Nordis Nord prospect was defined as a combined structural and stratigraphic trap where the expected hydrocarbon phase was oil.
    The main purpose of well 34/7-27 was to test the lithology and presence of hydrocarbons within the sandstone formations of the Brent Group. A secondary purpose of the well was to test a target in the Upper Jurassic, Draupne Formation and obtain pressure measurements in the Upper Jurassic and Brent to identify hydrocarbon communication in the area.
    Operations and results
    The wildcat well 34/7-27 was drilled with the semi-submersible installation "Byford Dolphin". The well was spudded on 1 September 1998 but, following problems running the 30"; casing, was respudded on 3 September and the well reached TD on 29 September 1998 at 3000 m in the Early Jurassic Drake Formation. The well was drilled with seawater and viscous sweeps down to 905 m and with water based silicate mud ("Barasilc") from 915 m to TD. Sands were encountered in the prospective levels. The well penetrated a 153 m thick Brent Group sequence (2777 - 2930 m) with excellent reservoir properties in the Etive Formation, reaching 28.7 % porosity and 2100 mD in the upper part. The well encountered no hydrocarbons. All penetrated sequences proved to be water filled with no shows. One core was cut in the Draupne and uppermost Heather formation (2742 - 2759 m). No fluid sampling was attempted. Well 34/7-27 was plugged and abandoned as a dry well on 7 October 1998.
    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]
    920.00
    3000.00

  • 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
    2742.0
    2756.4
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    14.4
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 2742-2747m
    Core photo at depth: 2747-2752m
    Core photo at depth: 2752-2756m
    Core photo at depth:  
    Core photo at depth:  
    2742-2747m
    2747-2752m
    2752-2756m

  • 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
    384.0
    36
    385.0
    0.00
    LOT
    INTERM.
    13 3/8
    905.0
    17 1/2
    905.0
    1.59
    LOT
    INTERM.
    9 5/8
    2102.0
    12 1/4
    2112.0
    1.80
    LOT
    OPEN HOLE
    3000.0
    8 1/2
    3000.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    FMI DSI HNGS
    2102
    2996
    HALS PEX
    2102
    2995
    MDT
    2749
    2918
    MSCT
    2732
    2951
    MWD - DIR GR EWR-P4
    2112
    3000
    MWD - DIR GR EWR-S PWD
    387
    2112
    VSP
    1630
    2880

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.35

  • 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
    3.32
    .pdf
    4.27
    .pdf
    111.60

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    380
    1.03
    SEAWATER
    387
    1.20
    SEAWATER
    475
    1.20
    SEAWATER
    600
    1.55
    29.0
    KCL/SILICATE
    915
    1.35
    12.0
    KCL/SILICATE
    1088
    1.36
    25.0
    KCL/SILICATE
    1553
    1.39
    16.0
    KCL/SILICATE
    1816
    1.41
    19.0
    KCL/SILICATE
    1997
    1.55
    28.0
    KCL/SILICATE
    2035
    1.45
    21.0
    KCL/SILICATE
    2112
    1.45
    20.0
    KCL/SILICATE
    2230
    1.50
    22.0
    KCL/SILICATE
    2364
    1.52
    23.0
    KCL/SILICATE
    2462
    1.54
    26.0
    KCL/SILICATE
    2470
    1.54
    24.0
    KCL/SILICATE
    2510
    1.55
    24.0
    KCL/SILICATE
    2742
    1.55
    25.0
    KCL/SILICATE
    2746
    1.55
    28.0
    KCL/SILICATE
    2759
    1.55
    27.0
    KCL/SILICATE
    3000
    1.56
    28.0
    KCL/SILICATE

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    940.0
    [m]
    DC
    GEOCH
    980.0
    [m]
    DC
    GEOCH
    1020.0
    [m]
    DC
    GEOCH
    1060.0
    [m]
    DC
    GEOCH
    1100.0
    [m]
    DC
    GEOCH
    1140.0
    [m]
    DC
    GEOCH
    1180.0
    [m]
    DC
    GEOCH
    1220.0
    [m]
    DC
    GEOCH
    1260.0
    [m]
    DC
    GEOCH
    1300.0
    [m]
    DC
    GEOCH
    1340.0
    [m]
    DC
    GEOCH
    1380.0
    [m]
    DC
    GEOCH
    1420.0
    [m]
    DC
    GEOCH
    1460.0
    [m]
    DC
    GEOCH
    1500.0
    [m]
    DC
    GEOCH
    1540.0
    [m]
    DC
    GEOCH
    1580.0
    [m]
    DC
    GEOCH
    1620.0
    [m]
    DC
    GEOCH
    1660.0
    [m]
    DC
    GEOCH
    1700.0
    [m]
    DC
    GEOCH
    1740.0
    [m]
    DC
    GEOCH
    1780.0
    [m]
    DC
    GEOCH
    1820.0
    [m]
    DC
    GEOCH
    1860.0
    [m]
    DC
    GEOCH
    1880.0
    [m]
    DC
    GEOCH
    1900.0
    [m]
    DC
    GEOCH
    1920.0
    [m]
    DC
    GEOCH
    1940.0
    [m]
    DC
    GEOCH
    1955.0
    [m]
    DC
    GEOCH
    1980.0
    [m]
    DC
    GEOCH
    2000.0
    [m]
    DC
    GEOCH
    2020.0
    [m]
    DC
    GEOCH
    2040.0
    [m]
    DC
    GEOCH
    2060.0
    [m]
    DC
    GEOCH
    2080.0
    [m]
    DC
    GEOCH
    2100.0
    [m]
    DC
    GEOCH
    2120.0
    [m]
    DC
    GEOCH
    2140.0
    [m]
    DC
    GEOCH
    2160.0
    [m]
    DC
    GEOCH
    2180.0
    [m]
    DC
    GEOCH
    2200.0
    [m]
    DC
    GEOCH
    2220.0
    [m]
    DC
    GEOCH
    2240.0
    [m]
    DC
    GEOCH
    2260.0
    [m]
    DC
    GEOCH
    2280.0
    [m]
    DC
    GEOCH
    2300.0
    [m]
    DC
    GEOCH
    2320.0
    [m]
    DC
    GEOCH
    2340.0
    [m]
    DC
    GEOCH
    2360.0
    [m]
    DC
    GEOCH
    2380.0
    [m]
    DC
    GEOCH
    2400.0
    [m]
    DC
    GEOCH
    2420.0
    [m]
    DC
    GEOCH
    2440.0
    [m]
    DC
    GEOCH
    2460.0
    [m]
    DC
    GEOCH
    2480.0
    [m]
    DC
    GEOCH
    2500.0
    [m]
    DC
    GEOCH
    2520.0
    [m]
    DC
    GEOCH
    2540.0
    [m]
    DC
    GEOCH
    2560.0
    [m]
    DC
    GEOCH
    2580.0
    [m]
    DC
    GEOCH
    2600.0
    [m]
    DC
    GEOCH
    2620.0
    [m]
    DC
    GEOCH
    2640.0
    [m]
    DC
    GEOCH
    2660.0
    [m]
    DC
    GEOCH
    2680.0
    [m]
    DC
    GEOCH
    2700.0
    [m]
    DC
    GEOCH
    2720.0
    [m]
    DC
    GEOCH
    2740.0
    [m]
    DC
    GEOCH
    2742.0
    [m]
    C
    GEOCH
    2743.0
    [m]
    C
    GEOCH
    2744.8
    [m]
    C
    GEOCH
    2745.0
    [m]
    DC
    GEOCH
    2745.2
    [m]
    C
    GEOCH
    2746.6
    [m]
    C
    GEOCH
    2746.8
    [m]
    C
    GEOCH
    2747.0
    [m]
    C
    GEOCH
    2748.0
    [m]
    C
    GEOCH
    2748.0
    [m]
    DC
    GEOCH
    2749.9
    [m]
    C
    GEOCH
    2750.2
    [m]
    C
    GEOCH
    2751.0
    [m]
    C
    GEOCH
    2751.0
    [m]
    DC
    GEOCH
    2752.5
    [m]
    C
    GEOCH
    2754.0
    [m]
    DC
    GEOCH
    2754.9
    [m]
    C
    GEOCH
    2755.1
    [m]
    C
    GEOCH
    2756.0
    [m]
    C
    GEOCH
    2757.0
    [m]
    DC
    GEOCH
    2758.9
    [m]
    SWC
    GEOCH
    2763.8
    [m]
    SWC
    GEOCH
    2766.0
    [m]
    DC
    GEOCH
    2769.0
    [m]
    DC
    GEOCH
    2769.7
    [m]
    SWC
    GEOCH
    2772.0
    [m]
    DC
    GEOCH
    2776.7
    [m]
    SWC
    GEOCH
    2779.5
    [m]
    SWC
    GEOCH
    2780.3
    [m]
    SWC
    GEOCH
    2784.0
    [m]
    DC
    GEOCH
    2787.0
    [m]
    DC
    GEOCH
    2802.0
    [m]
    DC
    GEOCH
    2808.0
    [m]
    DC
    GEOCH
    2814.0
    [m]
    DC
    GEOCH
    2823.0
    [m]
    DC
    GEOCH
    2829.0
    [m]
    DC
    GEOCH
    2832.0
    [m]
    DC
    GEOCH
    2841.0
    [m]
    DC
    GEOCH
    2856.0
    [m]
    DC
    GEOCH
    2862.0
    [m]
    DC
    GEOCH
    2868.0
    [m]
    DC
    GEOCH
    2871.0
    [m]
    DC
    GEOCH
    2877.0
    [m]
    DC
    GEOCH
    2886.0
    [m]
    DC
    GEOCH
    2889.0
    [m]
    DC
    GEOCH
    2901.0
    [m]
    DC
    GEOCH
    2907.0
    [m]
    DC
    GEOCH
    2913.5
    [m]
    DC
    GEOCH
    2916.0
    [m]
    DC
    GEOCH
    2922.0
    [m]
    DC
    GEOCH
    2925.0
    [m]
    DC
    GEOCH
    2928.8
    [m]
    SWC
    GEOCH
    2932.5
    [m]
    SWC
    GEOCH
    2940.0
    [m]
    DC
    GEOCH
    2949.0
    [m]
    DC
    GEOCH
    2955.0
    [m]
    DC
    GEOCH
    2967.0
    [m]
    DC
    GEOCH
    2976.0
    [m]
    DC
    GEOCH
    2985.0
    [m]
    DC
    GEOCH
    2994.0
    [m]
    DC
    GEOCH
    3000.0
    [m]
    DC
    GEOCH