Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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14.07.2024 - 01:28
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30/3-2 R

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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.
    30/3-2 R
    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
    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
    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.
    30/3-2
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    702 154 SP. 233
    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.
    Den norske stats oljeselskap 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.
    256-L2
    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.
    168
    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,
    02.09.1980
    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.
    16.02.1981
    Plugged and abondon date
    Date when the P&A-operations of the wellbore was finished, as reported by the operator to the Norwegian Offshore Directorate throught DDRS (Daily Drilling Reporting System). Only applied once pr. wellhead/surface location.
    16.02.1981
    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.
    16.02.1983
    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.
    17.10.2007
    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.
    YES
    Reentry activity
    Reason for reentry of the wellbore. Only relevant for exploration wellbores. Example of legal values: DRILLING, DRILLING/PLUGGING, LOGGING, PLUGGING, TESTING, TESTING/PLUGGING.
    DRILLING/PLUGGING
    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/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.
    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.
    MIDDLE JURASSIC
    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.
    BRENT GP
    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.
    186.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3567.0
    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).
    3566.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    2.75
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    125
    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.
    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.
    HEGRE GP
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    60° 47' 49.23'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 55' 18.06'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6740339.45
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    495736.96
    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.
    508
  • Wellbore history

    General
    Well 30/3-2 R is a re-entry of well 30/3-2, which was suspended at 955 m in Miocene sediments due to a strike. It is located ca 7 km north of the Oseberg Field in the Northern North Sea. The primary objective of the well was to test sandstones belonging to the Brent and Dunlin group. Secondary objective was sandstones in the Statfjord formation.
    Operations and results
    Wildcat well 30/3-2 was re-entered with the semi-submersible installation Deepsea Bergen on 2 September 1980 and drilled to TD at 3567 m in the Triassic Lunde Formation. The re-entry well track was drilled first with gel/lignosulphonate in 12 1/4" pilot hole from 955 m to 2350. Severe problems were experienced when opening up the pilot hole to 17 1/2". The mud system was changed, and a gypsum system was chosen. This change made it possible to complete the 17 1/2" section, but several days were lost due to hole problems and problems with the draw-works control circuits. The rest of the well was drilled with a gypsum/lignosulphonate mud and proceeded according to the program.
    The Brent group was encountered at 2825 m and consisted of the Ness Formation down to 2878 m and the Etive Formation from 2878 m to top Dunlin Group at 2949.5 m. The Statfjord Formation was encountered at 3228 m. The Brent Group contained two separate hydrocarbon-bearing reservoirs with one oil/water contact at 2839 m in the Ness formation, and another at 2932 m in the Oseberg Formation. RFT data also indicated a light hydrocarbon gradient (0.433 g/cc) in a 7 m thick Intra Dunlin (Cook) sand at 3071 m. The character of the fluorescence seen on this sand indicated gas. Frequent but discontinuous oil shows on limestone and claystone were observed beginning at 1930 m and down through Paleocene, Cretaceous and Late Jurassic to top reservoir in the Brent Group. Below OWC shows on sandstones were observed down to 3339 m.
    A total of 148 m core was recovered in 12 cores in the interval 2828 m to 3306.5 m in the Brent and Dunlin Groups and the Nansen Member of the Statfjord Formatoion. Three RFT segregated samples were taken in the Brent Group at 2833.5 m (mud filtrate and traces of oil and gas), 2872 m (mud filtrate, oil and some gas), and 2897.5 m (mud filtrate, 37 deg API oil and some gas). A fourth RFT segregated sample was taken in the upper Statfjord Formation, Nansen Member, at 3229.5 m (mud filtrate and gas). An FIT fluid sample was taken in the Dunlin Group at 3078 m (only mud filtrate and sand).
    The well was permanently abandoned on 16 February 1981 as an oil and gas discovery.
    Testing
    Three drill stem tests were attempted in the Brent Group reservoir, two of which were successful.
    DST 1 tested the interval 2916 - 2923 m in the Oseberg Formation. It produced 324 Sm3 oil and 26335 Sm3 gas /day through a 12.7 mm choke. The GOR was 81 Sm3/Sm3, the oil gravity was 38.8 deg API, and the gas gravity was 0.714 (air = 1). The DST temperature was 125.6 deg C.
    DST 2 tested the interval 2870 - 2874 m in the Ness Formation. It produced 370 Sm3 oil and 30865 Sm3 gas /day through a 12.7 mm choke. The GOR was 85.9 Sm3/Sm3, the oil gravity was 39.8 deg API, and the gas gravity was 0.710 (air = 1). The DST temperature was 122.2 deg C.
    DST 3 at 2832 - 2837 m in the Ness Formation failed for technical reasons.
  • 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
    2828.0
    2833.8
    [m ]
    2
    2834.5
    2842.0
    [m ]
    3
    2860.0
    2864.4
    [m ]
    4
    2879.0
    2893.5
    [m ]
    5
    2897.0
    2898.4
    [m ]
    6
    2898.5
    2916.0
    [m ]
    7
    2916.0
    2934.6
    [m ]
    8
    2934.6
    2951.2
    [m ]
    9
    3073.0
    3082.5
    [m ]
    10
    3083.7
    3102.0
    [m ]
    11
    3102.0
    3121.4
    [m ]
    12
    3295.0
    3306.6
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    144.8
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES
  • Core photos

    Core photos
    Core photo at depth: 2828-2830m
    Core photo at depth: 2830-2833m
    Core photo at depth: 2833-2834m
    Core photo at depth: 2834-2837m
    Core photo at depth: 2837-2839m
    2828-2830m
    2830-2833m
    2833-2834m
    2834-2837m
    2837-2839m
    Core photo at depth: 2839-2842m
    Core photo at depth: 2860-2862m
    Core photo at depth: 2862-2864m
    Core photo at depth: 2879-2882m
    Core photo at depth: 2881-2884m
    2839-2842m
    2860-2862m
    2862-2864m
    2879-2882m
    2881-2884m
    Core photo at depth: 2884-2887m
    Core photo at depth: 2887-2889m
    Core photo at depth: 2889-2892m
    Core photo at depth: 2892-2895m
    Core photo at depth: 2895-2896m
    2884-2887m
    2887-2889m
    2889-2892m
    2892-2895m
    2895-2896m
    Core photo at depth: 2897-2898m
    Core photo at depth: 2898-2901m
    Core photo at depth: 2901-2903m
    Core photo at depth: 2903-2906m
    Core photo at depth: 2906-2909m
    2897-2898m
    2898-2901m
    2901-2903m
    2903-2906m
    2906-2909m
    Core photo at depth: 2909-2912m
    Core photo at depth: 2912-2914m
    Core photo at depth: 2914-2915m
    Core photo at depth: 2916-2918m
    Core photo at depth: 2918-2921m
    2909-2912m
    2912-2914m
    2914-2915m
    2916-2918m
    2918-2921m
    Core photo at depth: 2921-2924m
    Core photo at depth: 2924-2926m
    Core photo at depth: 2926-2929m
    Core photo at depth: 2929-2932m
    Core photo at depth: 2932-2934m
    2921-2924m
    2924-2926m
    2926-2929m
    2929-2932m
    2932-2934m
    Core photo at depth: 2934-2937m
    Core photo at depth: 2937-2940m
    Core photo at depth: 2940-2942m
    Core photo at depth: 2942-2945m
    Core photo at depth: 2945-2948m
    2934-2937m
    2937-2940m
    2940-2942m
    2942-2945m
    2945-2948m
    Core photo at depth: 2948-2950m
    Core photo at depth: 2950-2951m
    Core photo at depth: 3073-3075m
    Core photo at depth: 3075-3078m
    Core photo at depth: 3078-3081m
    2948-2950m
    2950-2951m
    3073-3075m
    3075-3078m
    3078-3081m
    Core photo at depth: 3081-3082m
    Core photo at depth: 3083-3086m
    Core photo at depth: 3086-3089m
    Core photo at depth: 3089-3091m
    Core photo at depth: 3091-3094m
    3081-3082m
    3083-3086m
    3086-3089m
    3089-3091m
    3091-3094m
    Core photo at depth: 3094-3097m
    Core photo at depth: 3097-3099m
    Core photo at depth: 3099-3102m
    Core photo at depth: 3102-3104m
    Core photo at depth: 3104-3107m
    3094-3097m
    3097-3099m
    3099-3102m
    3102-3104m
    3104-3107m
    Core photo at depth: 3107-3110m
    Core photo at depth: 3110-3112m
    Core photo at depth: 3112-3115m
    Core photo at depth: 3115-3118m
    Core photo at depth: 3118-3120m
    3107-3110m
    3110-3112m
    3112-3115m
    3115-3118m
    3118-3120m
    Core photo at depth: 3120-3121m
    Core photo at depth: 3295-3297m
    Core photo at depth: 3297-3300m
    Core photo at depth: 3300-3303m
    Core photo at depth: 3303-3305m
    3120-3121m
    3295-3297m
    3297-3300m
    3300-3303m
    3303-3305m
    Core photo at depth: 3305-3306m
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    3305-3306m
  • Palynological slides at the Norwegian Offshore Directorate

    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    340.0
    [m]
    DC
    RRI
    640.0
    [m]
    DC
    RRI
    1140.0
    [m]
    DC
    RRI
    1840.0
    [m]
    DC
    RRI
    1940.0
    [m]
    DC
    RRI
    2031.0
    [m]
    DC
    RRI
    2331.0
    [m]
    DC
    RRI
    2655.0
    [m]
    DC
    RRI
    2721.0
    [m]
    DC
    RRI
    2724.0
    [m]
    DC
    FUGRO
    2748.0
    [m]
    DC
    FUGRO
    2772.0
    [m]
    DC
    FUGRO
    2790.0
    [m]
    DC
    FUGRO
    2820.0
    [m]
    DC
    FUGRO
    2826.0
    [m]
    DC
    FUGRO
    2947.9
    [m]
    C
    RRI
    2958.0
    [m]
    DC
    FUGRO
    2976.0
    [m]
    DC
    FUGRO
    2982.0
    [m]
    DC
    FUGRO
    3006.0
    [m]
    DC
    FUGRO
    3018.0
    [m]
    DC
    FUGRO
    3036.0
    [m]
    DC
    FUGRO
    3054.0
    [m]
    DC
    RRI
    3054.0
    [m]
    DC
    FUGRO
    3114.0
    [m]
    DC
    FUGRO
    3132.0
    [m]
    DC
    FUGRO
    3168.0
    [m]
    DC
    FUGRO
    3204.0
    [m]
    DC
    RRI
    3204.0
    [m]
    DC
    FUGRO
    3210.0
    [m]
    DC
    FUGRO
    3222.0
    [m]
    DC
    FUGRO
    3423.0
    [m]
    DC
    RRI
  • Lithostratigraphy

  • Geochemical information

    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    0.33
    pdf
    0.91
    pdf
    3.19
    pdf
    0.24
    pdf
    5.49
  • Drill stem tests (DST)

    Drill stem tests (DST)
    Test number
    From depth MD
    [m]
    To depth MD
    [m]
    Choke size
    [mm]
    1.0
    2916
    2923
    12.7
    2.0
    2870
    2874
    12.7
    3.0
    2832
    2837
    0.0
    Drill stem tests (DST)
    Test number
    Final shut-in pressure
    [MPa]
    Final flow pressure
    [MPa]
    Bottom hole pressure
    [MPa]
    Downhole temperature
    [°C]
    1.0
    32.000
    23.000
    2.0
    31.000
    23.000
    3.0
    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
    325
    27000
    0.831
    0.714
    86
    2.0
    369
    32000
    0.826
    0.710
    86
    3.0
  • Logs

    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL CCL GR
    1675
    3569
    CBL VDL GR
    2639
    3051
    DLL MSFL GR
    2332
    3562
    FDC CNL GR CAL
    940
    3567
    GEODIP
    2800
    3125
    HDT
    2332
    3567
    ISF SONIC GR SP
    259
    3567
    LDT CNT GR
    2332
    3059
    LDT GR CAL
    3051
    3567
    VELOCITY
    1900
    2500
  • 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
    260.0
    36
    261.0
    0.00
    LOT
    SURF.COND.
    20
    940.0
    26
    955.0
    1.72
    LOT
    INTERM.
    13 3/8
    2332.0
    17 1/2
    2355.0
    1.89
    LOT
    INTERM.
    9 5/8
    3057.0
    12 1/4
    3060.0
    1.80
    LOT
    LINER
    7
    3564.0
    8 1/2
    3567.0
    0.00
    LOT
  • Drilling mud

    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    600
    1.10
    50.0
    waterbased
    1250
    1.20
    50.0
    waterbased
    1530
    1.30
    54.0
    waterbased
    2020
    1.40
    57.0
    waterbased
    3050
    1.25
    56.0
    waterbased
    3400
    1.25
    57.0
    waterbased
  • Thin sections at the Norwegian Offshore Directorate

    Thin sections at the Norwegian Offshore Directorate
    Depth
    Unit
    2895.00
    [m ]
    3073.70
    [m ]
    3078.00
    [m ]
    3081.80
    [m ]
    3098.00
    [m ]
    3121.00
    [m ]
    3295.45
    [m ]
    3304.70
    [m ]
    3306.10
    [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
    0.23