Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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22.11.2024 - 09:09
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16/7-1

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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.
    16/7-1
    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
    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.
    16/7-1
    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.
    Esso Exploration and Production Norway 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.
    6-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.
    45
    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,
    11.08.1967
    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.
    24.09.1967
    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.
    24.09.1969
    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.
    24.09.2004
    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.
    DRY
    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.
    26.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    80.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    2781.0
    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).
    2726.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    36
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    91
    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 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.
    ZECHSTEIN GP
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    58° 20' 22.38'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 18' 49.96'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6466866.76
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    459826.92
    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.
    146

  • Wellbore history
    General
    Wildcat well 16/7-1 is located in the Ling Depression between the Utsira High and the Danish Norwegian Basin. The main objectives were to test the hydrocarbon potential of the sedimentary section and to investigate the lithology and sequence in this portion of the North Sea basin.
    Operations and results
    Well 16/7-1 was spudded with the semi-submersible installation Ocean Traveller on 11 August 1967 and drilled to TD at 2781 m in salt of the Late Permian Zechstein Group. Initial drilling from the sea floor to 381 m was with seawater and gel without casing. Returns were to the sea floor. Below 381 m to a depth of 2150 m, a Spersene XP-20 Lignosulphonate mud with 3% to 8% diesel oil was used. From 2150 m to TD, the mud system contained salt saturated Spersene XP-20 Lignosulphonate mud with 5% to 9% diesel oil.
    After cementing the 30-inch casing at 131 m, the well was drilled to 213 m. On pulling out of the hole, it was found that the guide structure had sunk 5 m into the seabed or 2.5 m below the mud line. The ocean floor structures were retrieved and the platform was moved 30 m southwest and the well was re-spudded. The 30-inch casing was again cemented at 131 m. No abnormal drilling problems were encountered until a depth of 2150 m was reached. At this depth, high chloride and high viscosity mud indicated that salt had been encountered. The Continuous Dipmeter indicated that there was excessive natural deviation probably due to contorted bedding in the salt section. Deviation below 2225 m was calculated to increase at the rate of 1° per 15 m to a depth of 2637 m where the deviation was 27°. Extrapolating this deviation resulted in a deviation of 36° at TD. The direction of deviation at TD was 583° E. While drilling salt at 2780 m pipe stuck, and when attempting to pull free collars parted. Plug was set, and tagged at 2644 m. The hole was then logged. To avoid bad dog leg another plug was set and tagged at 2210 m. While attempting to sidetrack pipe again stuck and parted. It was then decided to abandon the hole. The pre-Zechstein section was thus not penetrated.
    The well penetrated Top Cretaceous at 1856 m and top of the Late Permian Zechstein Group at 2085 m. The Jurassic and Triassic were not present. No shows were encountered in any part of well 16/7-1. One conventional core was cut from 1793 m to 1809 m in the Lista Formation. Sidewall cores were not taken. No fluid samples were taken. The well was permanently abandoned as a dry hole on 24 September 1967.
    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]
    1250.00
    9130.00

  • 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
    1793.1
    1807.8
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    14.6
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • 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
    131.0
    36
    131.0
    0.00
    LOT
    INTERM.
    13 3/8
    368.0
    17 1/2
    381.0
    0.00
    LOT
    INTERM.
    9 5/8
    1427.0
    12 1/4
    1440.0
    0.00
    LOT
    OPEN HOLE
    2781.0
    8 1/2
    2781.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CDM
    1428
    2646
    DIR
    1428
    2647
    FDC
    1428
    2643
    GR
    100
    369
    IES
    369
    1444
    LL-7
    1428
    2630
    MLL C
    369
    2644
    SGR C
    369
    2630

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.28

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    0.03
    pdf
    9.01

  • 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
    4.23

  • Documents – Norwegian Offshore Directorate papers
    Documents – Norwegian Offshore Directorate papers
    Document name
    Document format
    Document size [MB]
    pdf
    11.37
    pdf
    46.64

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    453
    1.10
    32.0
    seawater
    625
    1.10
    42.0
    seawater
    1059
    1.14
    40.0
    seawater
    1440
    1.14
    56.0
    seawater
    1911
    1.19
    47.0
    seawater
    2092
    1.29
    70.0
    seawater
    2150
    1.36
    92.0
    seawater

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1.0
    [unknown]
    C
    3510.0
    [ft]
    DC
    3590.0
    [ft]
    DC
    3680.0
    [ft]
    DC
    3800.0
    [ft]
    DC
    3890.0
    [ft]
    DC
    3980.0
    [ft]
    DC
    4010.0
    [ft]
    DC
    4070.0
    [ft]
    DC
    4100.0
    [ft]
    DC
    4160.0
    [ft]
    DC
    4190.0
    [ft]
    DC
    4250.0
    [ft]
    DC
    4280.0
    [ft]
    DC
    4310.0
    [ft]
    DC
    4340.0
    [ft]
    DC
    4370.0
    [ft]
    DC
    4400.0
    [ft]
    DC
    4430.0
    [ft]
    DC
    4460.0
    [ft]
    DC
    4490.0
    [ft]
    DC
    4520.0
    [ft]
    DC
    4580.0
    [ft]
    DC
    4580.0
    [ft]
    DC
    4610.0
    [ft]
    DC
    4724.0
    [ft]
    DC
    4770.0
    [ft]
    DC
    4800.0
    [ft]
    DC
    4830.0
    [ft]
    DC
    4880.0
    [ft]
    DC
    4900.0
    [ft]
    DC
    4920.0
    [ft]
    DC
    4980.0
    [ft]
    DC
    5000.0
    [ft]
    DC
    5020.0
    [ft]
    DC
    5080.0
    [ft]
    DC
    5120.0
    [ft]
    DC
    5180.0
    [ft]
    DC
    5200.0
    [ft]
    DC
    5220.0
    [ft]
    DC
    5280.0
    [ft]
    DC
    5300.0
    [ft]
    DC
    5320.0
    [ft]
    DC
    5400.0
    [ft]
    DC
    5420.0
    [ft]
    DC
    5480.0
    [ft]
    DC
    5500.0
    [ft]
    DC
    5520.0
    [ft]
    DC
    5580.0
    [ft]
    DC
    5600.0
    [ft]
    DC
    5620.0
    [ft]
    DC
    5680.0
    [ft]
    DC
    5700.0
    [ft]
    DC
    5720.0
    [ft]
    DC
    5780.0
    [ft]
    DC
    5800.0
    [ft]
    DC
    5820.0
    [ft]
    DC
    5883.0
    [ft]
    DC
    5885.0
    [ft]
    DC
    5885.0
    [ft]
    C
    5896.0
    [ft]
    C
    5903.0
    [ft]
    DC
    5904.0
    [ft]
    DC
    5909.0
    [ft]
    DC
    5913.0
    [ft]
    DC
    5915.0
    [ft]
    C
    5915.0
    [ft]
    DC
    5918.0
    [ft]
    C
    5927.0
    [ft]
    C
    5931.0
    [ft]
    DC
    5935.0
    [ft]
    DC
    5960.0
    [ft]
    DC
    5980.0
    [ft]
    DC
    6000.0
    [ft]
    DC
    6020.0
    [ft]
    DC
    6060.0
    [ft]
    DC
    6080.0
    [ft]
    DC
    6100.0
    [ft]
    DC
    6160.0
    [ft]
    DC
    6200.0
    [ft]
    DC
    6240.0
    [ft]
    DC
    6400.0
    [ft]
    DC
    6450.0
    [ft]
    DC
    6500.0
    [ft]
    DC
    6550.0
    [ft]
    DC
    6590.0
    [ft]
    DC
    6650.0
    [ft]
    DC
    6700.0
    [ft]
    DC
    6750.0
    [ft]
    DC
    6790.0
    [ft]
    DC
    6800.0
    [ft]
    DC
    6820.0
    [ft]
    DC
    6830.0
    [ft]
    DC
    6840.0
    [ft]
    DC
    6850.0
    [ft]
    DC
    6850.0
    [ft]
    DC
    6860.0
    [ft]
    DC
    6870.0
    [ft]
    DC
    6900.0
    [ft]
    DC
    6940.0
    [ft]
    DC
    7000.0
    [ft]
    DC
    7040.0
    [ft]
    DC
    7100.0
    [ft]
    DC
    7140.0
    [ft]
    DC
    7190.0
    [ft]
    DC
    7200.0
    [ft]
    DC
    7240.0
    [ft]
    DC
    7340.0
    [ft]
    DC
    7420.0
    [ft]
    DC
    7540.0
    [ft]
    DC
    7640.0
    [ft]
    DC
    7740.0
    [ft]
    DC
    7840.0
    [ft]
    DC
    7940.0
    [ft]
    DC
    8030.0
    [ft]
    DC
    8120.0
    [ft]
    DC
    8240.0
    [ft]
    DC
    8340.0
    [ft]
    DC
    8400.0
    [ft]
    DC
    8440.0
    [ft]
    DC
    8530.0
    [ft]
    DC
    8620.0
    [ft]
    DC
    8740.0
    [ft]
    DC
    8830.0
    [ft]
    DC
    8950.0
    [ft]
    DC
    9040.0
    [ft]
    DC
    9100.0
    [ft]
    DC