Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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26.11.2024 - 01:27
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6405/7-1

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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.
    6405/7-1
    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
    Press release
    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.
    NORWEGIAN SEA
    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.
    6405/7-1
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    GH0103 -Inline 1268 & Crossline 2342
    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.
    Statoil ASA (old)
    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.
    1060-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.
    113
    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,
    20.06.2003
    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.
    10.10.2003
    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.
    10.10.2005
    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.
    07.11.2005
    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
    Reentry
    Status whether the wellbore has been re-entered (YES) or not (NO). Re-entered wellbores are not included in the count when wellbores are presented in statistical overviews.
    NO
    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.
    OIL
    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.
    YES
    1st level with HC, age
    Age of lithostratigraphic unit, 1st level, where hydrocarbons were encountered. Examples of legal values: CRETACEOUS, EARLY CRETACEOUS, LATE JURASSIC, EOCENE. See also Norwegian Offshore Directorate bulletins.
    LATE CRETACEOUS
    1st level with HC, formation
    Name of lithostartigraphic unit, 1st level, where hydrocarbons were encountered. Shown only for released wells. Examples of legal values: BASEMENT, COOK FM, EKOFISK FM, HEIMDAL FM, SANDNES FM, SOGNEFJORD FM, TARBERT FM, BRENT GP. See also Norwegian Offshore Directorate bulletins.
    NISE FM
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    36.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    1206.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    4300.0
    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).
    4299.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    7.2
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    129
    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 CRETACEOUS
    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.
    LYSING FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    64° 17' 16.42'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    5° 7' 58.6'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7131004.00
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    603242.59
    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.
    4749

  • Wellbore history
    General
    Wildcat well 6405/7-1 was drilled in 1206 m water depth on the Grip High, ca 75 km due north of the Ormen Lange Field in the Norwegian Sea. The primary target was the Nise Formation of Campanian age. Secondary targets were the Lysing Formation of Coniacian age and a Danian lead, the Egga Member Equivalent. In addition, understanding of a mapped flat event was a main objective for this well.
    Operations and results
    Well 6405/7-1 was spudded with the dynamically positioned drill ship West Navigator on 21 June 2003 and drilled to TD at 4300 m in the Late Cretaceous Lysing Formation. In the 12 1/4" several incidents with high gas levels and also gain in the active system were recorded and responded to. In the end the mud weight had been increased from initially 1,33 g/cm3 when drilling to core point at 2816 m, to 1,42 g/cm3 prior to pulling out of the hole. The decision was made to plug back the 12 1/4" hole and initiate a technical side track (T2) with an 11 3/4" liner set above top of the reservoir. When the well was at TD and the discovery confirmed quality MWD data from the 26" section interval had to be collected. To obtain this a new 8 1/2" hole was drilled 15 m from the original hole from seafloor to 1920 m using LWD in one derrick, while performing wire line logging in the other. The well was drilled with seawater and hi-vis pills down to 1910 m and with Glydril DW (water based KCl/NaCl/Glycol/MEG/polymer) from 1910 m to TD. The post-TD 8 1/2" hole for MWD logging was drilled with seawater and hi-vis sweeps.
    The primary target, the Nise Formation, 2757 m to 2816 m in well 6405/7-1 and 2760.6 m to 2960 m in 6405/7-1T2, consists of layered/laminated and bioturbated claystones, siltstones and sandstones with poor reservoir quality. The Nise formation proved to be oil-bearing from the top at 2760.5 m and down to 2823 m. However, good oil shows are also described below this depth, to the base of the deepest core at 2881 m and on SWCs down to 2892 m. Oil samples were collected from wire line testing tool at 2763 m, 2770.5 m and 2828 m. Water samples were taken with wire line testing tool at 2828 m and 2850 m. The secondary target, the Lysing Formation, was encountered at 3665 m. The base of the Lysing Formation was not seen. The reservoir properties were poor. It consisted of highly bioturbated, very fine to fine grained sandstones, siltstones and claystones. Quartz cementation is common. The Lysing sands were water wet. No samples were taken due to tight formation. Five cores were cut in the interval 2754 m - 2881 m and two cores were cut in the interval 3751 m to 3784 m. All cores were cut in the T2 track.
    The well was permanently abandoned on 15 October 2003 as an oil discovery
    Testing
    A drill stem test was performed from the interval 2758 m - 2811.7 m. The production rate from the test was 40 m3 oil/day, with a GOR of 175 m3/m3. Stock tank oil density was measured to 868 kg/m3 (31 deg API). Geochemical analyses show that the oil contain relatively low-mature biomarkers from a post Jurassic source rock, but there may be several populations of oils in the reservoir.

  • 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]
    1920.00
    4300.00

  • 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
    2754.0
    2764.0
    [m ]
    2
    2781.0
    2806.6
    [m ]
    3
    2808.0
    2831.6
    [m ]
    4
    2835.0
    2861.5
    [m ]
    5
    2862.0
    2869.4
    [m ]
    6
    3751.0
    3756.0
    [m ]
    7
    3757.0
    3783.1
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    124.2
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 2754-2758m
    Core photo at depth: 2758-2762m
    Core photo at depth: 2762-2764m
    Core photo at depth: 2781-2785m
    Core photo at depth: 2785-2789m
    2754-2758m
    2758-2762m
    2762-2764m
    2781-2785m
    2785-2789m
    Core photo at depth: 2789-2793m
    Core photo at depth: 2793-2797m
    Core photo at depth: 2797-2801m
    Core photo at depth: 2801-2805m
    Core photo at depth: 2805-2806m
    2789-2793m
    2793-2797m
    2797-2801m
    2801-2805m
    2805-2806m
    Core photo at depth: 2808-2812m
    Core photo at depth: 2812-2816m
    Core photo at depth: 2816-2820m
    Core photo at depth: 2820-2824m
    Core photo at depth: 2824-2828m
    2808-2812m
    2812-2816m
    2816-2820m
    2820-2824m
    2824-2828m
    Core photo at depth: 2828-2831m
    Core photo at depth: 2835-2839m
    Core photo at depth: 2839-2843m
    Core photo at depth: 2843-2847m
    Core photo at depth: 2847-2851m
    2828-2831m
    2835-2839m
    2839-2843m
    2843-2847m
    2847-2851m
    Core photo at depth: 2851-2855m
    Core photo at depth: 2855-2859m
    Core photo at depth: 2859-2861m
    Core photo at depth: 2862-2866m
    Core photo at depth: 2866-2869m
    2851-2855m
    2855-2859m
    2859-2861m
    2862-2866m
    2866-2869m
    Core photo at depth: 3751-3755m
    Core photo at depth: 3755-3756m
    Core photo at depth: 3757-3761m
    Core photo at depth: 3761-3765m
    Core photo at depth: 3765-3769m
    3751-3755m
    3755-3756m
    3757-3761m
    3761-3765m
    3765-3769m
    Core photo at depth: 3769-3773m
    Core photo at depth: 3773-3777m
    Core photo at depth: 3777-3781m
    Core photo at depth: 3781-3783m
    Core photo at depth:  
    3769-3773m
    3773-3777m
    3777-3781m
    3781-3783m

  • Oil samples at the Norwegian Offshore Directorate
    Oil samples at the Norwegian Offshore Directorate
    Test type
    Bottle number
    Top depth
    MD [m]
    Bottom depth
    MD [m]
    Fluid type
    Test time
    Samples available
    DST
    2811.70
    2758.00
    OIL
    02.10.2003 - 21:00
    YES

  • Lithostratigraphy
    Lithostratigraphy
    Top depth [mMD RKB]
    Lithostrat. unit
    1242
    1242
    1935
    1935
    2506
    2506
    2602
    2664
    2664
    2757
    2960
    3665
    3665

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.58

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    6.05

  • 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
    0.99
    .PDF
    6.81

  • Drill stem tests (DST)
    Drill stem tests (DST)
    Test number
    From depth MD
    [m]
    To depth MD
    [m]
    Choke size
    [mm]
    1.0
    2758
    2812
    12.7
    Drill stem tests (DST)
    Test number
    Final shut-in pressure
    [MPa]
    Final flow pressure
    [MPa]
    Bottom hole pressure
    [MPa]
    Downhole temperature
    [°C]
    1.0
    72
    Drill stem tests (DST)
    Test number
    Oil
    [Sm3/day]
    Gas
    [Sm3/day]
    Oil density
    [g/cm3]
    Gas grav. rel.air
    GOR
    [m3/m3]
    1.0
    40
    7000
    175

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    MRIL GR
    2750
    3112
    MRIL GR
    3200
    4300
    MWD LWD - DIR RES GR
    1312
    2425
    MWD LWD - DIR RES GR
    2440
    4300
    MWD LWD - DIR RES GR NUC.SON
    1242
    1920
    MWD LWD - DIR RES GR NUCL.SON
    2428
    2816
    PFC GR EZSV BRIDGE PLUG
    2650
    2840
    RCI GR
    2754
    2886
    RCI GR
    2760
    3158
    RCI GR
    2763
    2824
    RCI GR
    3227
    4195
    RCI GR
    3757
    3757
    RCOR GR
    2765
    3174
    RCOR GR
    4099
    4293
    SBT CCL GR
    2180
    3185
    STAR GR
    2736
    3197
    TTRM DSL CN ZDL DLL
    3187
    4300
    TTRM DSL CN ZDL XMAC DLL MLL
    3200
    2625
    TTRM DSL ORIT XMAC DLL MLL
    1900
    2416
    TTRM DSL ORIT XMACII.HDLL MLL
    3187
    4300
    VSP
    1885
    4295

  • 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
    SURF.COND.
    30
    1310.0
    36
    1310.0
    0.00
    LOT
    INTERM.
    20
    1900.0
    26
    1910.0
    1.33
    LOT
    INTERM.
    13 3/8
    2417.0
    17
    2425.0
    1.42
    LOT
    INTERM.
    11 3/4
    2741.0
    14
    2741.0
    1.60
    LOT
    INTERM.
    9 5/8
    3187.0
    12 1/4
    3200.0
    1.70
    LOT
    OPEN HOLE
    4300.0
    8 1/2
    4300.0
    0.00
    LOT

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    1421
    1.03
    SW / BENTONITE 7
    1910
    1.35
    SEAWATER/CMC
    2070
    1.23
    20.0
    GLYDRIL DW 37
    2425
    1.23
    18.0
    GLYDRIL DW 37
    2742
    1.37
    18.0
    GLYDRIL DW 37
    2805
    1.45
    19.0
    GLYDRIL DW 37
    2816
    1.35
    20.0
    GLYDRIL DW 37
    2862
    1.45
    22.0
    GLYDRIL DW 37
    3200
    1.45
    19.0
    GLYDRIL DW 37
    3411
    1.41
    21.0
    GLYDRIL DW 37
    3764
    1.41
    21.0
    GLYDRIL DW 37
    4062
    1.41
    21.0
    GLYDRIL DW 37
    4300
    1.41
    22.0
    GLYDRIL DW 37

  • Thin sections at the Norwegian Offshore Directorate
    Thin sections at the Norwegian Offshore Directorate
    Depth
    Unit
    2840.10
    [m ]
    2762.60
    [m ]

  • Pressure plots
    Pressure plots
    The pore pressure data is sourced from well logs if no other source is specified. In some wells where pore pressure logs do not exist, information from Drill stem tests and kicks have been used. The data has been reported to the NPD, and further processed and quality controlled by IHS Markit.
    Pressure plots
    Document name
    Document format
    Document size [MB]
    pdf
    0.28