Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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15.07.2024 - 01:28
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2/9-3

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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.
    2/9-3
    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
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    2/9-3
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    ANO-8180-230 & SP 295
    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.
    Amoco Norway Oil Company
    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.
    618-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.
    93
    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,
    13.09.1989
    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.
    14.12.1989
    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.
    14.12.1991
    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.
    26.10.2009
    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 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.
    25.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    67.1
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    4859.0
    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).
    4855.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    9.2
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    148
    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.
    EARLY PERMIAN
    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.
    ROTLIEGEND GP
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    56° 26' 3.38'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    3° 47' 49.91'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6254838.58
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    549162.29
    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.
    1443
  • Wellbore history

    General
    Well 2/9-3 was drilled on the Piggvar Terrace, between the Central Graben to the west and the Mandal High and the Søgne Basin to the east. The primary objective was to test for hydrocarbons, reservoir quality, and source rock potential and maturation in Late and Middle Jurassic formations. Secondary objectives were to determine the Permian stratigraphy in this portion of the Piggvar Terrace, and the reservoir quality and possible hydrocarbon accumulation in Early Permian Rotliegendes sands.
    Operations and results
    Wildcat well 2/9-3 was spudded with the semi-submersible installation Dyvi Stena on13 September 1989. After drilling to 378 m the hole packed off, and the well had to be re-spudded. The re-spud took place 20 m from the original location on 15 September 1989 and the well was drilled to TD at 4859 m in the Early Permian Rotliegend Group. BHA component failures in the 12.25" and 8.5" hole sections accounted for 9.4 days of lost time, but generally drilling and operations went without significant problems, and the well was drilled within the scheduled time. Possible shallow gas had been warned pre-drill at 160, 425 and 535 m, but no shallow gas was encountered. The well was drilled with seawater and hi-vis pills down to 850 m, with KCl/PHPA/PAC mud from 850 m to 3875 m, and with HRM/polymer mud from 3875 m to TD.
    The lowermost part of the chalk was of Santonian age. The Coniacian, Turonian and Cenomanian were apparently absent as they where in well 2/9-2. A 12 m thick Early Cretaceous section was penetrated, dating Valanginian to Early Barremian. No evidence of Albian, Aptian and Ryazanian was seen. Top Late Jurassic came in at 3846 m, close to prognosed depth. A seismic event at 4190 m, originally interpreted to mark the top of Middle Jurassic, occurs within the Late Jurassic shale. The Late Jurassic sequence proved to be a good source rock for oil, with maturity in the upper part of the oil window. The well penetrated 57 m of Bryne Formation at 4543 m, and the Triassic section came in at 4600 m, 175 m deep to prognosis. The well drilled from Triassic "Red Beds" directly into the Lower Permian, without any Zechstein salt being penetrated. The Permian section consisted of a brick red and medium grey claystone at the top grading into varicoloured sandstone from 4730 m downwards. This sandstone was fine grained, hard, well cemented with volcanic fragments scattered throughout. The Permian Volcanic Basement was penetrated at 4852 m, and the final TD reached 7 m deeper at 4859 m.
    Occasional weak shows were seen on claystones and limestone of the Tyne Group from 3874 m down to 4155 m. Shows were recorded on sandstones throughout the interval 4542 m to 4677 m in the Bryne Formation and into the Triassic.
    Two cores were cut at 4524.6 m to 4552.2 m in the lower part of the Late Jurassic section. Core 1 (10.8 m) consisted of very fine, well cemented and tight sandstone with poor reservoir quality. Core 2 (16.6 m) consisted of claystone/shale with minor siltstone at the top. No fluid samples were taken in the well.
    The well was permanently abandoned on 14 December 1989 as a dry hole with minor oil 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]
    850.00
    4857.00
  • 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
    4524.6
    4535.4
    [m ]
    2
    4535.6
    4552.2
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    27.4
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES
  • Core photos

    Core photos
    Core photo at depth: 4524-4529m
    Core photo at depth: 4529-4534m
    Core photo at depth: 4534-4538m
    Core photo at depth: 4538-4543m
    Core photo at depth: 4543-4548m
    4524-4529m
    4529-4534m
    4534-4538m
    4538-4543m
    4543-4548m
    Core photo at depth: 4548-4552m
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    4548-4552m
  • Lithostratigraphy

  • Geochemical information

    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    1.01
  • 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
    57.30
  • Logs

    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL VDL GR
    500
    2768
    CBL VDL GR CCL
    1660
    2824
    CST GR
    3028
    3870
    CST GR
    3874
    4848
    DIL BHC GR CAL
    840
    2758
    DIL BHC GR CAL SP
    2776
    3873
    DIL BHC GR MSFL CAL SP
    3864
    4847
    LDL CNLGR
    3864
    4861
    MWD - GR RES DIR
    92
    4859
    RECT
    4590
    4598
    RFT GR
    4528
    4597
    RFT GR
    4590
    4599
    RSCT
    4526
    4527
    RSCT
    4587
    4587
    RSCT
    4777
    4777
    SHDT GR
    2776
    3875
    SHDT GR
    3864
    4848
    VELOCITY
    500
    4843
  • 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
    299.0
    36
    313.0
    0.00
    LOT
    INTERM.
    20
    840.0
    26
    850.0
    1.74
    LOT
    INTERM.
    13 3/8
    2780.0
    17 1/2
    2800.0
    1.87
    LOT
    INTERM.
    9 5/8
    3865.0
    12 1/4
    3875.0
    1.99
    LOT
    OPEN HOLE
    4859.0
    8 1/2
    4859.0
    0.00
    LOT
  • Drilling mud

    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    127
    1.03
    WATER BASED
    15.12.1989
    172
    1.20
    10.0
    21.5
    WATER BASED
    13.09.1989
    214
    1.03
    9.0
    30.6
    WATER BASED
    19.09.1989
    308
    1.03
    9.0
    24.4
    WATER BASED
    19.09.1989
    313
    1.03
    WATER BASED
    19.09.1989
    313
    1.03
    10.0
    23.0
    WATER BASED
    19.09.1989
    405
    1.03
    15.0
    20.1
    WATER BASED
    20.09.1989
    763
    1.03
    WATER BASED
    21.09.1989
    850
    1.03
    WATER BASED
    22.09.1989
    850
    1.03
    WATER BASED
    25.09.1989
    850
    1.03
    WATER BASED
    26.09.1989
    850
    1.20
    40.0
    9.6
    WATER BASED
    25.09.1989
    1047
    1.20
    16.0
    4.8
    WATER BASED
    27.09.1989
    1373
    1.28
    13.0
    4.8
    WATER BASED
    28.09.1989
    1560
    1.56
    27.0
    5.3
    WATER BASED
    29.09.1989
    1895
    1.56
    22.0
    3.8
    WATER BASED
    03.10.1989
    2090
    1.56
    24.0
    6.2
    WATER BASED
    03.10.1989
    2500
    1.56
    29.0
    10.0
    WATER BASED
    03.10.1989
    2698
    1.56
    24.0
    5.7
    WATER BASED
    03.10.1989
    2800
    1.57
    26.0
    7.2
    WATER BASED
    04.10.1989
    2800
    1.57
    30.0
    6.7
    WATER BASED
    05.10.1989
    2800
    1.57
    29.0
    4.3
    WATER BASED
    06.10.1989
    2800
    1.62
    25.0
    5.3
    WATER BASED
    10.10.1989
    2800
    1.62
    25.0
    4.8
    WATER BASED
    10.10.1989
    2800
    1.62
    23.0
    4.3
    WATER BASED
    10.10.1989
    2800
    1.62
    21.0
    4.3
    WATER BASED
    11.10.1989
    2800
    1.60
    24.0
    4.3
    WATER BASED
    10.10.1989
    2803
    1.62
    24.0
    6.7
    WATER BASED
    12.10.1989
    3016
    1.62
    32.0
    9.6
    WATER BASED
    13.10.1989
    3117
    1.62
    28.0
    6.2
    WATER BASED
    16.10.1989
    3201
    1.62
    23.0
    6.7
    WATER BASED
    16.10.1989
    3305
    1.62
    21.0
    6.7
    WATER BASED
    16.10.1989
    3321
    1.62
    18.0
    4.8
    WATER BASED
    17.10.1989
    3435
    1.62
    22.0
    5.7
    WATER BASED
    18.10.1989
    3546
    1.62
    21.0
    6.7
    WATER BASED
    19.10.1989
    3632
    1.62
    25.0
    5.3
    WATER BASED
    23.10.1989
    3632
    1.62
    25.0
    5.3
    WATER BASED
    23.10.1989
    3696
    1.62
    23.0
    6.7
    WATER BASED
    23.10.1989
    3696
    1.62
    23.0
    6.7
    WATER BASED
    23.10.1989
    3778
    1.62
    24.0
    5.7
    WATER BASED
    23.10.1989
    3778
    1.62
    24.0
    5.7
    WATER BASED
    23.10.1989
    3782
    1.62
    21.0
    5.3
    WATER BASED
    24.10.1989
    3807
    1.62
    22.0
    5.3
    WATER BASED
    25.10.1989
    3807
    1.62
    21.0
    5.7
    WATER BASED
    27.10.1989
    3808
    1.62
    22.0
    5.3
    WATER BASED
    27.10.1989
    3831
    1.62
    24.0
    5.7
    WATER BASED
    30.10.1989
    3831
    1.62
    23.0
    6.7
    WATER BASED
    30.10.1989
    3839
    1.62
    24.0
    5.3
    WATER BASED
    30.10.1989
    3841
    1.62
    23.0
    4.3
    WATER BASED
    02.11.1989
    3843
    1.62
    22.0
    5.3
    WATER BASED
    02.11.1989
    3843
    1.62
    20.0
    3.8
    WATER BASED
    02.11.1989
    3859
    1.03
    1.0
    WATER BASED
    14.12.1989
    3867
    1.62
    25.0
    3.3
    WATER BASED
    03.11.1989
    3875
    1.63
    21.0
    3.3
    WATER BASED
    06.11.1989
    3875
    1.62
    21.0
    4.3
    WATER BASED
    07.11.1989
    3875
    1.62
    21.0
    3.3
    WATER BASED
    06.11.1989
    3875
    1.62
    24.0
    4.8
    WATER BASED
    08.11.1989
    3875
    1.62
    23.0
    5.3
    WATER BASED
    09.11.1989
    3876
    1.63
    20.0
    3.3
    WATER BASED
    06.11.1989
    3877
    1.80
    19.0
    3.8
    WATER BASED
    10.11.1989
    3878
    1.80
    21.0
    2.9
    WATER BASED
    13.11.1989
    3901
    1.80
    25.0
    7.2
    WATER BASED
    13.11.1989
    3975
    1.80
    26.0
    3.8
    WATER BASED
    13.11.1989
    4040
    1.80
    28.0
    3.8
    WATER BASED
    14.11.1989
    4107
    1.80
    27.0
    3.8
    WATER BASED
    15.11.1989
    4169
    1.80
    27.0
    3.8
    WATER BASED
    16.11.1989
    4200
    1.80
    25.0
    3.3
    WATER BASED
    17.11.1989
    4218
    1.80
    25.0
    3.3
    WATER BASED
    20.11.1989
    4294
    1.80
    24.0
    3.8
    WATER BASED
    20.11.1989
    4353
    1.80
    23.0
    3.8
    WATER BASED
    20.11.1989
    4413
    1.80
    22.0
    3.8
    WATER BASED
    21.11.1989
    4488
    1.80
    20.0
    3.3
    WATER BASED
    22.11.1989
    4524
    1.80
    22.0
    3.3
    WATER BASED
    23.11.1989
    4524
    1.80
    20.0
    3.3
    WATER BASED
    24.11.1989
    4536
    1.80
    19.0
    3.8
    WATER BASED
    28.11.1989
    4564
    1.80
    17.0
    3.3
    WATER BASED
    28.11.1989
    4614
    1.80
    19.0
    3.3
    WATER BASED
    28.11.1989
    4682
    1.82
    20.0
    4.8
    WATER BASED
    28.11.1989
    4715
    1.82
    19.0
    4.3
    WATER BASED
    29.11.1989
    4715
    1.82
    18.0
    3.3
    WATER BASED
    30.11.1989
    4772
    1.82
    18.0
    5.3
    WATER BASED
    01.12.1989
    4858
    1.82
    19.0
    5.3
    WATER BASED
    04.12.1989
    4859
    1.82
    19.0
    4.3
    WATER BASED
    04.12.1989
    4859
    1.82
    17.0
    3.3
    WATER BASED
    04.12.1989
    4859
    1.85
    19.0
    3.3
    WATER BASED
    05.12.1989
    4859
    1.85
    19.0
    3.8
    WATER BASED
    06.12.1989
    4862
    1.85
    21.0
    4.3
    WATER BASED
    07.12.1989
    4862
    1.85
    22.0
    4.8
    WATER BASED
    08.12.1989
    4862
    1.85
    16.0
    3.8
    WATER BASED
    11.12.1989
    4862
    1.85
    18.0
    3.8
    WATER BASED
    11.12.1989
    4862
    1.85
    20.0
    5.3
    WATER BASED
    11.12.1989
    4862
    1.85
    210.0
    5.7
    WATER BASED
    12.12.1989
    4862
    1.03
    WATER BASED
    13.12.1989
  • 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
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