Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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21.11.2024 - 01:28
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7123/4-1 A

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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.
    7123/4-1 A
    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).
    APPRAISAL
    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.
    BARENTS 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.
    7123/4-1
    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.
    StatoilHydro Petroleum 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.
    1173-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.
    24
    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,
    21.04.2008
    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.
    14.05.2008
    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.
    14.05.2010
    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.
    14.05.2010
    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.
    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.
    23.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    413.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2855.0
    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).
    2626.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    45
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    94
    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.
    SNADD FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    71° 36' 49.3'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    23° 3' 48.7'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7947301.07
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    572637.44
    UTM zone
    Universal Transverse Mercator zone. Examples of legal values: 31, 32, 33, 34.
    34
    NPDID wellbore
    Norwegian Offshore Directorate's unique id for the wellbore.
    5808

  • Wellbore history
    General
    The 7123/4-1 S and its sidetrack 7123/4-1 A Tornerose wells were drilled ca 50 km east of the Snøhvit Field in the Hammerfest Basin. The primary objective was to prove additional gas reserves in the Tornerose structure, east of the discovery wells 7122/6-1 and 7122/6-2. The Triassic reservoir was prognosed as similar to the reservoir encountered in 7122/6-1.
    Operations and results
    Well 7123/4-1 S was spudded with the semi-submersible installation Polar Pioneer on 12 March 2008. Due to junk in hole in the 17 1/2" section it was impossible to drill beyond 726 m. The primary well was thus plugged back and a technical sidetrack was made with kick-off at 681 m (termed 7123/4-1 ST2 in well reports, but no such distinction is made here). 7123/4-1 S was drilled to TD at 2920 m (2706.4 m TVD) in the Triassic Snadd Formation. Thereafter, on 14 May, a sidetrack 7123/4-1 A was kicked off from 1659 m and drilled to a depth of 2855.1 m (2626.3 m TVD) in the Triassic Snadd Formation. No shallow gas was observed by the ROV at the wellhead or by the MWD while drilling the 36" hole and the 17 1/2" hole sections. The top hole down to 1106 m was drilled with seawater/bentonite and CaCl2/polymer mud. Below 1106 m FormPro mud was used in both well tracks.
    Well 7123/4-1 S penetrated rocks of Quaternary, Tertiary, Cretaceous, Jurassic and Triassic ages. In well 7123/4-1 S the Snadd reservoir was penetrated at 2266.2 m (2222.6 m TVD), 41 m shallower than prognosis. Top Carnian reservoir within the Snadd Formation was penetrated at 2459.0 m (2364.1 m TVD), 28.9 meter shallower than prognosis. Two cores were cut in 7123/4-1 S in the Snadd Formation. The first core was cut in a thin sand above the Carnian reservoir from 2435 to 2452 m, while the second core was cut covering middle to lower parts of Carnian reservoir T1 and upper parts of Carnian reservoir T2 from 2474 to 2501 m. Pressure points were taken in the Capp Toscana Group and the Snadd Formation, whereas 1 gallon sample (MDT fluid sample) was taken in Carnian reservoir T2 (Snadd Formation).
    In sidetrack 7123/4-1 A the Snadd reservoir was penetrated at 2259.0 m (2185.1 m TVD), 14.3 m deeper than prognosis. Top Carnian reservoir within the Snadd Formation was penetrated at 2525.0 m (2376 m TVD), 21 meter deeper than prognosis. In 7123/4-1 A one core was cut from 2670 to 2697 m in a thin sandy sequence approximately 17 meter below the base of the Carnian reservoir in the Snadd Formation. Pressure points were taken in the Capp Toscana Group, whereas MDT fluid samples were collected at 2165.9 m (water and oil), 2166.4 m (water only), 2534.1 m (water only), 2542.6 m (water and oil), and at 2551.5 m (water and oil).
    High gas readings and fluorescence with cut on sandstone cuttings and cores in the Snadd Formation were reported in both wells. These shows were interpreted as residual hydrocarbons.
    Well 7123/4-1 S was permanently abandoned on 21 April 2008, while the sidetrack 7123/4-1 A was permanently abandoned on 14 May 2008. Both were classified as dry as a dry with shows of residual hydrocarbons.
    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]
    1660.00
    2855.00

  • 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
    2670.0
    2696.6
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    26.6
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • 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
    OPEN HOLE
    2855.0
    8 1/2
    2855.0
    1.44
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CMR+ PEX HRLA NHGS ECS
    1641
    2806
    FMI DSI
    1641
    2850
    MDT
    2094
    2850
    MDT MINI DST DP
    2166
    2490
    MWD - GVR6 ARCVRES6 POWERPULSE
    1656
    2855
    VSP ZO
    1450
    2855

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.34

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    txt
    0.00
    txt
    0.22

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    1150
    1.31
    14.0
    Form Pro
    1550
    1.32
    14.0
    FormPro
    1606
    1.33
    15.0
    FormPro
    1648
    1.32
    14.0
    Form Pro
    1730
    1.32
    15.0
    Form Pro
    1800
    1.32
    14.0
    Form Pro
    1861
    1.32
    15.0
    Form Pro
    2050
    1.32
    15.0
    Form Pro
    2102
    1.32
    14.0
    Form Pro
    2146
    1.32
    14.0
    Form Pro
    2194
    1.31
    15.0
    Form Pro
    2207
    1.31
    13.0
    Form Pro
    2220
    1.31
    14.0
    Form Pro
    2248
    1.31
    14.0
    Form Pro
    2252
    1.32
    14.0
    Form Pro
    2270
    1.31
    14.0
    Form Pro
    2288
    1.31
    14.0
    FormPro
    2317
    1.31
    15.0
    FormPro
    2324
    1.31
    14.0
    Form Pro
    2325
    1.31
    14.0
    Form Pro
    2360
    1.31
    14.0
    FormPro
    2440
    1.31
    14.0
    Form Pro
    2529
    1.32
    14.0
    Form Pro
    2615
    1.31
    14.0
    FormPro
    2700
    1.31
    13.0
    Form Pro
    2772
    1.31
    14.0
    FormPro
    2841
    1.31
    15.0
    FormPro
    2855
    1.31
    15.0
    FormPro

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1600.0
    [m]
    DC
    STATHYD
    1680.0
    [m]
    DC
    STATHY
    1700.0
    [m]
    DC
    STATHY
    1720.0
    [m]
    DC
    STATHY
    1740.0
    [m]
    DC
    STATHY
    1760.0
    [m]
    DC
    STATHY
    1780.0
    [m]
    DC
    STATHY
    1800.0
    [m]
    DC
    STATHY
    1810.0
    [m]
    DC
    STATHY
    1830.0
    [m]
    DC
    STATHY
    1840.0
    [m]
    DC
    STATHY
    1860.0
    [m]
    DC
    STATHY
    1870.0
    [m]
    DC
    STATHY
    1890.0
    [m]
    DC
    STATHY
    1900.0
    [m]
    DC
    STATHY
    1930.0
    [m]
    DC
    STATHY
    1940.0
    [m]
    DC
    STATHY
    1960.0
    [m]
    DC
    STATHY
    1970.0
    [m]
    DC
    STATHY
    1990.0
    [m]
    DC
    STATHY
    2000.0
    [m]
    DC
    STATHY
    2020.0
    [m]
    DC
    STATHY
    2030.0
    [m]
    DC
    STATHY
    2050.0
    [m]
    DC
    STATHY
    2060.0
    [m]
    DC
    STATHY
    2080.0
    [m]
    DC
    STATHY
    2090.0
    [m]
    DC
    STATHY
    2108.0
    [m]
    DC
    STATHY
    2120.0
    [m]
    DC
    STATHY
    2144.0
    [m]
    DC
    STATHY
    2156.0
    [m]
    DC
    STATHY
    2162.0
    [m]
    DC
    STATHY
    2180.0
    [m]
    DC
    STATHY
    2186.0
    [m]
    DC
    STATHY
    2198.0
    [m]
    DC
    STATHY
    2204.0
    [m]
    DC
    STATHY
    2216.0
    [m]
    DC
    STATHY
    2228.0
    [m]
    DC
    STATHY
    2240.0
    [m]
    DC
    STATHY
    2246.0
    [m]
    DC
    STATHY
    2264.0
    [m]
    DC
    STATHY
    2270.0
    [m]
    DC
    STATHY
    2282.0
    [m]
    DC
    STATHY
    2288.0
    [m]
    DC
    STATHY
    2300.0
    [m]
    DC
    STATHY
    2306.0
    [m]
    DC
    STATHY
    2318.0
    [m]
    DC
    STATHY
    2330.0
    [m]
    DC
    STATHY
    2342.0
    [m]
    DC
    STATHY
    2348.0
    [m]
    DC
    STATHY
    2360.0
    [m]
    DC
    STATHY
    2366.0
    [m]
    DC
    STATHY
    2378.0
    [m]
    DC
    STATHY
    2384.0
    [m]
    DC
    STATHY
    2396.0
    [m]
    DC
    STATHY
    2402.0
    [m]
    DC
    STATHY
    2414.0
    [m]
    DC
    STATHY
    2420.0
    [m]
    DC
    STATHY
    2432.0
    [m]
    DC
    STATHY
    2438.0
    [m]
    DC
    STATHY
    2450.0
    [m]
    DC
    STATHY
    2456.0
    [m]
    DC
    STATHY
    2468.0
    [m]
    DC
    STATHY
    2474.0
    [m]
    DC
    STATHY
    2486.0
    [m]
    DC
    STATHY
    2492.0
    [m]
    DC
    STATHY
    2504.0
    [m]
    DC
    STATHY
    2510.0
    [m]
    DC
    STATHY
    2522.0
    [m]
    DC
    STATHY
    2528.0
    [m]
    DC
    STATHY
    2540.0
    [m]
    DC
    STATHY
    2546.0
    [m]
    DC
    STATHY
    2558.0
    [m]
    DC
    STATHY
    2564.0
    [m]
    DC
    STATHY
    2576.0
    [m]
    DC
    STATHY
    2582.0
    [m]
    DC
    STATHY
    2594.0
    [m]
    DC
    STATHY
    2600.0
    [m]
    DC
    STATHY
    2612.0
    [m]
    DC
    STATHY
    2618.0
    [m]
    DC
    STATHY
    2630.0
    [m]
    DC
    STATHY
    2636.0
    [m]
    DC
    STATHY
    2648.0
    [m]
    DC
    STATHY
    2654.0
    [m]
    DC
    STATHY
    2666.0
    [m]
    DC
    STATHY
    2672.6
    [m]
    CC
    STATHY
    2675.9
    [m]
    CC
    STATHY
    2677.6
    [m]
    CC
    STATHY
    2680.5
    [m]
    CC
    STATHY
    2682.4
    [m]
    CC
    STATHY
    2686.9
    [m]
    CC
    STATHY
    2687.6
    [m]
    CC
    STATHY
    2689.5
    [m]
    CC
    STATHY
    2691.2
    [m]
    CC
    STATHY
    2692.6
    [m]
    CC
    STATHY
    2695.9
    [m]
    CC
    STATHY
    2700.0
    [m]
    DC
    STATHY
    2712.0
    [m]
    DC
    STATHY
    2724.0
    [m]
    DC
    STATHY
    2730.0
    [m]
    DC
    STATHY
    2742.0
    [m]
    DC
    STATHY
    2748.0
    [m]
    DC
    STATHY
    2760.0
    [m]
    DC
    STATHY
    2766.0
    [m]
    DC
    STATHY
    2778.0
    [m]
    DC
    STATHY
    2784.0
    [m]
    DC
    STATHY
    2796.0
    [m]
    DC
    STATHY
    2802.0
    [m]
    DC
    STATHY
    2814.0
    [m]
    DC
    STATHY
    2820.0
    [m]
    DC
    STATHY
    2832.0
    [m]
    DC
    STATHY
    2838.0
    [m]
    DC
    STATHY
    2850.0
    [m]
    DC
    STATHY
    2855.0
    [m]
    DC
    STATHY