Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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6305/7-1

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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.
    6305/7-1
    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).
    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
    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
    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.
    6305/7-1
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    BPN 9603- INLINE 2008 & X-LINE 3170
    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.
    BP Norway Limited U.A.
    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.
    932-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.
    54
    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,
    08.07.1998
    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.
    30.08.1998
    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.
    30.08.2000
    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
    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.
    GAS
    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
    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.
    PALEOCENE
    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.
    EGGA (INFORMAL)
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    26.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    857.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3377.0
    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).
    3376.9
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    2.6
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    100
    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.
    SPRINGAR FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    63° 21' 47.6'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    5° 15' 43.73'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7028228.30
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    613145.72
    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.
    3535

  • Wellbore history
    General
    Well 6305/7-1 was the first well drilled in licence PL 208 and the second in the Møre Basin deep-water area. The well was targeted at the Barden prospect at Tertiary level. The main objectives of the well were to establish the presence, quality and fluid content of the Lower Tertiary Egga Member in the Tang Formation and to penetrate a seismic flat-spot within this unit.
    Operations and results
    Wildcat well 6305/7-1 was spudded in 857 m water depth with the semi-submersible installation "Ocean Alliance" on 6 July 1998 and drilled to TD at 3377 m in the Late Cretaceous Springar Formation. The well was drilled water based with seawater and hi-vis pills down to 1708 m and with KCl/NaCl/PAC mud from 1708 m to TD. Drilling went without major problems but was suspended from 20 July to 1 August (10 days) due to fishing regulations. Top Egga Member sandstone was penetrated at 2911 m. The reservoir was recognized by an abrupt increase in LWD resistivity and a decrease in LWD gamma. A total of 4 cores were cut from the Egga Member and top of the Springar Formation in the interval 2917 m to 3012.5 m with a total recovery of 94 m (98%). MDT samples were taken at 2921 and 2937 m in the Egga Member sandstone. The samples contained dry gas (93.5 % methane). Wire line coring and sampling proved a gas column from 2915 m to 2939.5 m. Both the reservoir thickness of the Egga formation and the net to gross were better than expected. The well was plugged and abandoned on 30 August 1998 and was classified as a gas appraisal well for the Ormen Lange 6305/5-1 gas discovery.
    Testing
    A drill stem test was performed in the interval 2915 m to 2931 m. The test flowed dry gas (93.3 % methane) with a GOR of 11000 Sm3/Sm3

  • 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]
    1710.00
    3377.00

  • 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
    2917.0
    2943.8
    [m ]
    2
    2944.0
    2971.2
    [m ]
    3
    2971.0
    2984.9
    [m ]
    4
    2985.5
    3011.8
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    94.1
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 2917-2922m
    Core photo at depth: 2922-2927m
    Core photo at depth: 2927-2932m
    Core photo at depth: 2932-2937m
    Core photo at depth: 2937-2942m
    2917-2922m
    2922-2927m
    2927-2932m
    2932-2937m
    2937-2942m
    Core photo at depth: 2942-2944m
    Core photo at depth: 2944-2949m
    Core photo at depth: 2949-2954m
    Core photo at depth: 2954-2959m
    Core photo at depth: 2959-2964m
    2942-2944m
    2944-2949m
    2949-2954m
    2954-2959m
    2959-2964m
    Core photo at depth: 2964-2969m
    Core photo at depth: 2969-2971m
    Core photo at depth: 2971-2976m
    Core photo at depth: 2976-2981m
    Core photo at depth: 2981-2985m
    2964-2969m
    2969-2971m
    2971-2976m
    2976-2981m
    2981-2985m
    Core photo at depth: 2985-2990m
    Core photo at depth: 2990-2995m
    Core photo at depth: 2995-3000m
    Core photo at depth: 3000-3005m
    Core photo at depth: 3005-3010m
    2985-2990m
    2990-2995m
    2995-3000m
    3000-3005m
    3005-3010m
    Core photo at depth: 3010-3012m
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    3010-3012m

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    2917.7
    [m]
    C
    GEUS
    2923.2
    [m]
    C
    GEUS
    2930.1
    [m]
    C
    GEUS
    2951.4
    [m]
    C
    GEUS
    2952.6
    [m]
    C
    OD
    2955.6
    [m]
    C
    GEUS
    2958.2
    [m]
    C
    GEUS
    2959.4
    [m]
    C
    OD
    2959.7
    [m]
    C
    GEUS
    2961.5
    [m]
    C
    OD
    2961.8
    [m]
    C
    GEUS
    2963.7
    [m]
    C
    GEUS
    2965.3
    [m]
    C
    OD
    2965.5
    [m]
    C
    GEUS
    2968.8
    [m]
    C
    GEUS
    2969.0
    [m]
    C
    OD
    2971.3
    [m]
    C
    GEUS
    2973.9
    [m]
    C
    OD
    2974.4
    [m]
    C
    GEUS
    2976.5
    [m]
    C
    OD
    2977.0
    [m]
    C
    GEUS
    2980.0
    [m]
    C
    GEUS
    2980.6
    [m]
    C
    OD
    2982.0
    [m]
    C
    GEUS
    2983.6
    [m]
    C
    GEUS
    2987.2
    [m]
    C
    GEUS
    2989.0
    [m]
    C
    OD
    2989.0
    [m]
    C
    GEUS
    2989.4
    [m]
    C
    GEUS
    2992.2
    [m]
    C
    GEUS
    2992.5
    [m]
    C
    GEUS
    2992.7
    [m]
    C
    GEUS
    2993.4
    [m]
    C
    GEUS
    2995.0
    [m]
    C
    GEUS
    2995.1
    [m]
    C
    OD
    2995.7
    [m]
    C
    GEUS
    2995.7
    [m]
    C
    GEUS
    2998.5
    [m]
    C
    GEUS
    3001.0
    [m]
    C
    GEUS
    3001.1
    [m]
    C
    OD
    3006.3
    [m]
    C
    OD
    3007.7
    [m]
    C
    GEUS
    3009.8
    [m]
    C
    OD
    3010.7
    [m]
    C
    GEUS

  • 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
    DST 1
    2931.00
    2915.00
    CONDENSATE
    23.08.1998 - 00:00
    NO

  • Lithostratigraphy
    Lithostratigraphy
    Top depth [mMD RKB]
    Lithostrat. unit
    883
    883
    1529
    1529
    2562
    2562
    2657
    2911
    2992
    2992

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.33

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    1.96
    pdf
    1.86
    pdf
    1.82
    pdf
    0.97

  • 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
    2.10
    .pdf
    56.29

  • Drill stem tests (DST)
    Drill stem tests (DST)
    Test number
    From depth MD
    [m]
    To depth MD
    [m]
    Choke size
    [mm]
    1.0
    2915
    2931
    23.8
    Drill stem tests (DST)
    Test number
    Final shut-in pressure
    [MPa]
    Final flow pressure
    [MPa]
    Bottom hole pressure
    [MPa]
    Downhole temperature
    [°C]
    1.0
    28.960
    90
    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
    58
    638000
    0.770
    0.610
    11000

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CSAT GR
    1920
    2780
    CSAT GR
    2720
    3360
    CST GR
    2832
    3360
    FMI DSI
    2000
    3373
    HALS DSI PEX EMS
    883
    2819
    MDT GR
    2914
    3047
    MWD - DIR
    904
    925
    MWD - DIR FE
    2819
    2917
    MWD - DIR FE
    2917
    2919
    MWD - DIR PWD GR
    941
    2819
    MWD - RLL GR
    2944
    3012
    PEX GPIT
    2761
    3380

  • 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
    907.0
    36
    907.0
    0.00
    LOT
    INTERM.
    13 3/8
    1696.0
    17 1/2
    1696.0
    1.40
    LOT
    INTERM.
    9 5/8
    2810.0
    12 1/4
    2819.0
    0.00
    LOT
    LINER
    7
    3377.0
    8 1/2
    3377.0
    0.00
    LOT

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    961
    1.03
    20.0
    WATER BASED MUD
    1269
    1.03
    15.0
    WATER BASED MUD
    1708
    0.00
    WATER BASED MUD
    2071
    1.28
    40.0
    WATER BASED MUD
    2819
    1.30
    44.0
    WATER BASED MUD
    2852
    1.30
    27.0
    WATER BASED MUD
    2944
    1.30
    33.0
    WATER BASED MUD
    2968
    1.30
    29.0
    WATER BASED MUD
    2980
    1.30
    28.0
    WATER BASED MUD
    2993
    1.30
    28.0
    WATER BASED MUD
    3377
    1.08
    1.0
    WATER BASED MUD

  • 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
    0.29