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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7122/4-1

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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.
    7122/4-1
    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.
    BARENTS SEA
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    7122/4-1
    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.
    Esso Exploration and Production Norway 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.
    706-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.
    62
    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,
    13.11.1991
    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.
    13.01.1992
    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.
    13.01.1994
    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.
    23.5
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    344.5
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3015.0
    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.
    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° 44' 50.47'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    22° 5' 6.39'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7961309.50
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    537933.23
    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.
    1869

  • Wellbore history
    General
    Wildcat well 7122/4-1 was drilled in the Northern part of the Hammerfest Basin. The objective of the well was to test the Åsgard prospect, a large, tilted horst with Middle-Lower Jurassic sandstones of the Stø formation as the primary objective. The underlying Nordmela and Tubåen formations were also considered to have potential for reservoired hydrocarbons. The trap was formed by a horst structure dipping towards the North-Northwest. Well 7122/4-1 was the first well on this prospect.
    Operations and results
    Well 7122/4-1 was spudded with the semi submersible installation Sonate Arcade Frontier on 13 November 1991 and drilled to a total depth of 3015 m in the Triassic Snadd Formation. The well was drilled with seawater and gel down to 815 m, with KCl/polymer from 815 m to 2015 m, and with KCl/NaCl/Polymer from 2015 m to TD.
    Good reservoir quality sandstones were encountered in the Stø and Nordmela Formations. Core analysis indicated generally good porosity and permeability. FMT's run in the Stø confirmed good permeability. However, analysis of the wire line logs indicated clearly that the Stø and Nordmela sandstones are water wet. The Tubåen Formation consisted primarily of sandstone, but was very thin in this well. Log analysis indicated that these sandstones are also water wet. Thin, tight sandstones (interbedded with claystone and siltstone) were present through much of the Triassic, generally decreasing in thickness with depth. From 2970 to 2990 m a Carnian sandstone was penetrated. The drill gas was higher through this zone than in any other sandstone in the well, averaging about 0.8 %. The cutting samples showed the reservoir quality to be quite poor, with no visible porosity. Numerous unsuccessful attempts with the FMT tool to obtain a pressure measurement indicated that this zone has extremely low permeability. This was confirmed by the log analysis.
    Hydrocarbon shows were first observed in the Early Cretaceous Knurr Formation. There was no fluorescence however a slow, pale milky-white cut was received from the claystone. At 2240 m in the Hekkingen Formation there was again no direct fluorescence, but with a milky-white cut being present. The Hekkingen is quite rich and is a good source rock. Residual hydrocarbon shows are present throughout the Stø and Nordmela Formations. The fluorescence varies from white to yellow and green in colour. The cuts also vary, from milky-white to yellow-white and to greenish. The differences in colour possibly represent variations in the gravity of the residual hydrocarbons. No shows were observed in the Carnian sandstone apart from the elevated drill gas.
    Geochemical analysis indicated that the Hekkingen Formation contains rich organic matter with fair to good potential for a mixed gas/oil generation. Poor to fair potential for generating gas exists in parts of the Knurr, Nordmela and Fruholmen formations. The pore pressure remained at 9.1 ppg EMW until approximately 2175 m, just above the top of the Jurassic. From this depth the pore pressure increased to just over 10 ppg EMW, at approximately 2250 m. The pressure then decreased to, and remained at, 9.5 ppg EMW. The top of the organic rich, Jurassic, Hekkingen Formation roughly coincides with the interpreted increase in pore pressure. Four conventional cores were cut, starting 7 meters into the Stø at 2333 m and continuing to 2410 m, 24 m into the Nordmela Formation. One FMT sample consisting predominantly of mud filtrate was obtained at 2327.5 m.
    The well was permanently abandoned on 13 January 1992 as a dry hole with shows.
    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]
    820.00
    3015.00

  • 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
    2333.0
    2351.0
    [m ]
    2
    2339.0
    2357.0
    [m ]
    3
    2357.0
    2381.6
    [m ]
    4
    2382.0
    2410.0
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    88.6
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 2333-2338m
    Core photo at depth: 2338-2343m
    Core photo at depth: 2343-2345m
    Core photo at depth: 2345-2350m
    Core photo at depth: 2350-2355m
    2333-2338m
    2338-2343m
    2343-2345m
    2345-2350m
    2350-2355m
    Core photo at depth: 2355-2357m
    Core photo at depth: 2357-2362m
    Core photo at depth: 2362-2367m
    Core photo at depth: 2367-2372m
    Core photo at depth: 2372-2377m
    2355-2357m
    2357-2362m
    2362-2367m
    2367-2372m
    2372-2377m
    Core photo at depth: 2377-2382m
    Core photo at depth: 2382-2383m
    Core photo at depth: 2382-2387m
    Core photo at depth: 2387-2392m
    Core photo at depth: 2392-2397m
    2377-2382m
    2382-2383m
    2382-2387m
    2387-2392m
    2392-2397m
    Core photo at depth: 2397-2402m
    Core photo at depth: 2402-2407m
    Core photo at depth: 2407-2410m
    Core photo at depth:  
    Core photo at depth:  
    2397-2402m
    2402-2407m
    2407-2410m

  • 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
    403.7
    36
    405.0
    0.00
    LOT
    INTERM.
    13 3/8
    804.0
    17 1/2
    806.0
    1.64
    LOT
    INTERM.
    9 5/8
    1985.6
    12 1/4
    1986.0
    0.00
    LOT
    OPEN HOLE
    3015.0
    8 1/2
    3015.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL
    1550
    1983
    CN ZDL GR SP CAL
    1983
    3012
    DIFL AC ZDL GR SP CAL
    804
    2004
    DIPLOG
    1983
    3012
    DLL MLL LSAC GR SP CAL
    1983
    3012
    FMT GR
    2441
    3005
    MWD
    404
    815
    SWC
    850
    2000
    SWC
    2026
    3012
    ZOVSP
    812
    3000

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.47

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    2.63

  • 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
    20.65

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    1676
    1.32
    22.0
    WATER BASED
    1678
    1.26
    18.0
    WATER BASED
    1886
    1.33
    20.0
    WATER BASED
    1966
    1.33
    22.0
    WATER BASED
    2015
    1.35
    20.0
    WATER BASED
    2073
    1.31
    19.0
    WATER BASED
    2116
    1.30
    21.0
    WATER BASED
    2327
    1.30
    22.0
    WATER BASED
    2342
    1.30
    20.0
    WATER BASED
    2345
    1.30
    21.0
    WATER BASED
    2372
    1.30
    20.0
    WATER BASED
    2382
    1.30
    20.0
    WATER BASED
    2410
    1.30
    21.0
    WATER BASED
    2450
    1.30
    19.0
    WATER BASED
    2508
    1.30
    19.0
    WATER BASED
    2579
    1.30
    19.0
    WATER BASED
    2648
    1.30
    20.0
    WATER BASED
    3000
    1.26
    22.0
    WATER BASED
    3015
    1.26
    20.0
    WATER BASED

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    850.0
    [m]
    SWC
    869.0
    [m]
    SWC
    875.0
    [m]
    SWC
    910.0
    [m]
    SWC
    930.0
    [m]
    SWC
    970.0
    [m]
    DC
    1000.0
    [m]
    SWC
    1050.0
    [m]
    DC
    1100.0
    [m]
    DC
    1155.0
    [m]
    SWC
    1175.0
    [m]
    DC
    1200.0
    [m]
    DC
    1250.0
    [m]
    DC
    1300.0
    [m]
    SWC
    1380.0
    [m]
    SWC
    1548.0
    [m]
    SWC
    1570.0
    [m]
    DC
    1600.0
    [m]
    DC
    1630.0
    [m]
    DC
    1658.0
    [m]
    SWC
    1690.0
    [m]
    DC
    1720.0
    [m]
    DC
    1750.0
    [m]
    SWC
    1790.0
    [m]
    SWC
    1803.0
    [m]
    SWC
    1805.0
    [m]
    SWC
    1810.0
    [m]
    SWC
    1850.0
    [m]
    SWC
    1955.0
    [m]
    SWC
    1974.0
    [m]
    SWC
    2000.0
    [m]
    SWC
    2026.5
    [m]
    SWC
    2075.0
    [m]
    SWC
    2118.0
    [m]
    SWC
    2148.0
    [m]
    SWC
    2150.0
    [m]
    DC
    2165.0
    [m]
    DC
    2180.0
    [m]
    DC
    2185.0
    [m]
    DC
    2200.0
    [m]
    SWC
    2224.0
    [m]
    SWC
    2240.0
    [m]
    DC
    2260.0
    [m]
    DC
    2287.0
    [m]
    SWC
    2290.0
    [m]
    DC
    2296.0
    [m]
    SWC
    2303.0
    [m]
    SWC
    2317.0
    [m]
    SWC
    2330.0
    [m]
    DC
    2342.0
    [m]
    DC
    2363.0
    [m]
    C
    2364.8
    [m]
    C
    FUGRO
    2386.0
    [m]
    C
    2389.3
    [m]
    C
    FUGRO
    2397.0
    [m]
    C
    2398.3
    [m]
    C
    FUGRO
    2409.8
    [m]
    C
    FUGRO
    2410.0
    [m]
    C
    2430.0
    [m]
    DC
    2450.0
    [m]
    DC
    2475.0
    [m]
    SWC
    2512.0
    [m]
    SWC
    2529.5
    [m]
    SWC
    2560.0
    [m]
    DC
    2590.0
    [m]
    DC
    2625.5
    [m]
    SWC
    2645.0
    [m]
    DC
    2701.0
    [m]
    SWC
    2715.0
    [m]
    DC
    2745.0
    [m]
    DC
    2745.0
    [m]
    DC
    2775.0
    [m]
    DC
    2792.5
    [m]
    SWC
    2835.0
    [m]
    DC
    2853.0
    [m]
    SWC
    2865.0
    [m]
    DC
    2895.0
    [m]
    DC
    2925.0
    [m]
    DC
    2948.0
    [m]
    SWC
    2955.0
    [m]
    DC
    2978.0
    [m]
    DC
    3000.0
    [m]
    DC
    3015.0
    [m]
    DC