Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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31.10.2024 - 01:27
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2/10-1 S

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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.
    2/10-1 S
    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.
    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.
    2/10-1
    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.
    Phillips Petroleum Company Norway
    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.
    141-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.
    221
    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,
    16.09.1975
    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.
    23.04.1976
    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.
    23.04.1978
    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.
    01.07.2004
    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.
    GAS 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.
    27.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    66.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    4609.0
    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).
    4267.2
    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.
    CARBONIFEROUS
    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.
    NO GROUP DEFINED
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    56° 7' 32.15'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    3° 18' 6.68'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6220236.98
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    518765.86
    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.
    284

  • Wellbore history
    General
    The 2/10-1 S "South East Eel" well is located in the Grensen Nose, close to the southern tip of the Norwegian sector. It was drilled in the Tertiary basin of the North Sea approximately 20 km south of the Embla discovery. The primary objective horizons were the Early Cretaceous - Late Jurassic clastic sediments and the Danian - Late Cretaceous limestones. Seismic data were interpreted as wedging out of the Early Cretaceous - Late Jurassic sediments up-dip to the west of the well location. These sediments produced oil in the Phillips 2/7-3 and 2/7-9 wells while Late Jurassic turbidite sands were present in the Eldfisk 2/7-1 well. In addition a small Danian/Late Cretaceous structure was defined on a seismic. The 2/7-2 well a few miles to the north in a similar geological situation produced 345 BOPD from the Danian. Secondary objectives were Tertiary and possible Rotliegendes sandstones.
    Operations and results
    Exploration well 2/10-1 S was spudded with the semi-submersible installation Ocean Viking on 16 September 1975 and drilled deviated to TD at 4609 m (4267 m TVD RKB) in rocks of possibly Carboniferous age. While drilling the 8 1/2" section at 4028 m the weather deteriorated. The drill string was hung off before the rig started to drift, and had to be towed to Stavanger. Winds were reported up to 30 m/s and waves up to 22 m. Altogether 34 days were lost before the rig again was on location and could continue drilling. The well was drilled with sea water and gel down to 442 m and with PAC/sea water with 4% oil from 442 m to TD.
    No oil shows were encountered during the drilling, however, a gas kick was noted when drilling into the top of the Rotliegendes sandstone section. No testing was carried out due to engineering difficulties although three drill stem tests in the Permian were planned. The well was drilled as per progress down to the base of the Cretaceous sediments. No clastics were developed in the Tertiary whilst the Danian/Late Cretaceous limestones were wet. The limestones exhibited good porosity. The Early Cretaceous consisted of the Rødby Formation and the Mandal Formation. No sands were present. Below the Cretaceous, the sediments wedging out proved to be older than expected. No Jurassic sediments were encountered. The well went first into barren red measures of possible Triassic age and then into Zechstein carbonates followed by the Rotliegendes. Three sandstone members (net 35 m thick) were developed in upper part of the Rotliegendes, the upper sand showing a good gas kick drilling at 4343 m, while the Lower Rotliegendes consisted of interbedded shales and volcanics. The possibly Carboniferous sediments at TD also consisted of interbedded shales and volcanics. Although the well proved to be different from the prognosis, the sand development and shows in the Rotliegendes are very encouraging. No cores were cut in the well and no fluid samples taken. The well was permanently abandoned on 23 April 1976 as a well with strong gas shows in Rotliegendes.
    Testing
    Preparations for testing were made and two zones in Rotliegendes in the interval 4337 m to 4371 m were perforated, but the test was not carried out due to a leak in the casing.

  • Cuttings at the Norwegian Offshore Directorate
    Cuttings at the Norwegian Offshore Directorate
    Cuttings available for sampling?
    NO
    Cuttings at the Norwegian Offshore Directorate
    Cutting sample, top depth [m]
    Cutting samples, bottom depth [m]
    1197.86
    4609.19

  • 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
    130.0
    36
    130.0
    0.00
    LOT
    SURF.COND.
    20
    441.0
    26
    462.0
    0.00
    LOT
    INTERM.
    13 3/8
    1240.0
    17 1/2
    1250.0
    0.00
    LOT
    INTERM.
    9 5/8
    3267.0
    12 1/4
    3277.0
    0.00
    LOT
    LINER
    7
    4135.0
    8 1/2
    4144.0
    0.00
    LOT
    LINER
    5
    4609.0
    6
    4609.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    BCS GR
    129
    4606
    CBL
    3962
    4328
    CBL
    3962
    4328
    CBL
    4039
    4589
    CCL PERF
    4267
    4462
    CNL
    4127
    4589
    FDC
    3267
    4135
    IES
    441
    4606
    TEMP
    30
    3261

  • 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
    1.53

  • 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
    15.70

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    463
    0.87
    WATER BASED
    22.04.1976
    1251
    0.98
    WATER BASED
    22.04.1976
    1283
    1.00
    WATER BASED
    22.04.1976
    1832
    1.29
    WATER BASED
    22.04.1976
    3276
    1.37
    WATER BASED
    22.04.1976
    4028
    1.36
    WATER BASED
    22.04.1976
    4144
    1.46
    WATER BASED
    22.04.1976
    4228
    1.45
    WATER BASED
    22.04.1976
    4609
    1.45
    WATER BASED
    22.04.1976

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    4267.0
    [m]
    DC
    OD
    4276.0
    [m]
    DC
    OD
    4285.0
    [m]
    DC
    OD
    4295.0
    [m]
    DC
    OD
    4304.0
    [m]
    DC
    OD
    4319.0
    [m]
    DC
    OD
    4325.0
    [m]
    DC
    OD
    4334.0
    [m]
    DC
    OD
    4343.0
    [m]
    DC
    OD
    4353.0
    [m]
    DC
    OD
    4362.0
    [m]
    DC
    OD
    4371.0
    [m]
    DC
    OD
    4380.0
    [m]
    DC
    OD
    4389.0
    [m]
    DC
    OD
    4398.0
    [m]
    DC
    OD
    4407.0
    [m]
    DC
    OD
    4417.0
    [m]
    DC
    OD
    4423.0
    [m]
    DC
    OD
    4429.0
    [m]
    DC
    OD
    4438.0
    [m]
    DC
    OD
    4447.0
    [m]
    DC
    OD
    4456.0
    [m]
    DC
    OD
    4465.0
    [m]
    DC
    OD
    4474.0
    [m]
    DC
    OD
    4484.0
    [m]
    DC
    OD
    4493.0
    [m]
    DC
    OD
    4502.0
    [m]
    DC
    OD
    4511.0
    [m]
    DC
    OD
    4520.0
    [m]
    DC
    OD
    4529.0
    [m]
    DC
    OD
    4538.0
    [m]
    DC
    OD
    4551.0
    [m]
    DC
    OD
    4557.0
    [m]
    DC
    OD
    4566.0
    [m]
    DC
    OD
    4575.0
    [m]
    DC
    OD
    4584.0
    [m]
    DC
    OD
    4593.0
    [m]
    DC
    OD
    4602.0
    [m]
    DC
    OD