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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16/7-5

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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.
    16/7-5
    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.
    16/7-5
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    ST 8122 - 552 SP. 615.5
    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.
    423-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.
    33
    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,
    02.07.1984
    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.
    03.08.1984
    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.
    03.08.1986
    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.
    15.08.2008
    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.
    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.
    26.8
    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).
    2900.0
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    95
    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.
    SMITH BANK FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    58° 21' 6.3'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 4' 56.16'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6468386.64
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    446284.86
    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.
    134

  • Wellbore history
    Well 16/7-5 is located ca 10 km east of the Sleipner Øst field in the North Sea. The primary objective was to test potential gas bearing Jurassic/Triassic sandstones.
    Operations and results
    Wildcat well 16/7-5 was spudded with the semi-submersible installation Zapata Ugland on 2 July 1984 and drilled to TD at 2900 m in the Triassic Smith Bank Formation. Due to turning of the permanent guide base the 30" casing had to be re-landed. No other major problems occurred during drilling. The well was drilled with gel/sea water down to 170 m, and with seawater/lignosulphonate gel from 470 m to TD.
    The ?Jurassic/Triassic (Skagerrak Formation) was encountered at 2594, underlying an interpreted one-meter layer of Draupne shale. A 306 m gross / 120.5 m net (22% average porosity) sequence of sands was penetrated. No significant hydrocarbon shows were encountered while drilling the well. Electric log analysis also confirmed that the Jurassic/Triassic Sandstone (primary objective) was water bearing. RFT pressure measurements and samples suggested the possible presence of minor amount of gas in the upper part (2594 m to 2642.6 m) where the pressure gradient was lower than the water gradient (below 2662.5 m). However, the pressure readings were scattered in this interval and very much subject to interpretation.
    One core was cut from 2590 to 2603 m (2596 - 2612.5 m logger's depth) in the top of the target sands in the Skagerrak Formation. Three successful RFT fluid samples were taken. The first sample, at 2691 m, recovered "2800 cc. of light brown fluid, mainly mud filtrate and mud, no gas, no fluorescence". The second, at 2806.5 m, recovered "8600 cc. of clear medium brown fluid, mainly mud filtrate with a few cc's of gas. The fluid had no odour or taste but it had a very pale bluish white fluorescence". The third, at 2603 m, recovered "8700 cc. of none clear (turbid) fluid + few cc's of gas. The fluid had no odour or taste, but a pale bluish white fluorescence".
    The well was permanently abandoned on 3 August as a dry well.
    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]
    170.00
    2897.00

  • 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
    2590.0
    2603.1
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    13.1
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 2590-2596m
    Core photo at depth: 2596-2602m
    Core photo at depth: 2602-2603m
    Core photo at depth:  
    Core photo at depth:  
    2590-2596m
    2596-2602m
    2602-2603m

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    470.0
    [m]
    DC
    500.0
    [m]
    DC
    530.0
    [m]
    DC
    560.0
    [m]
    DC
    590.0
    [m]
    DC
    620.0
    [m]
    DC
    650.0
    [m]
    DC
    680.0
    [m]
    DC
    710.0
    [m]
    DC
    740.0
    [m]
    DC
    770.0
    [m]
    DC
    800.0
    [m]
    DC
    830.0
    [m]
    DC
    860.0
    [m]
    DC
    890.0
    [m]
    DC
    920.0
    [m]
    DC
    940.0
    [m]
    DC
    950.0
    [m]
    DC
    970.0
    [m]
    DC
    980.0
    [m]
    DC
    1010.0
    [m]
    DC
    1040.0
    [m]
    DC
    1070.0
    [m]
    DC
    1100.0
    [m]
    DC
    1100.0
    [m]
    DC
    1130.0
    [m]
    DC
    1140.0
    [m]
    DC
    1160.0
    [m]
    DC
    1190.0
    [m]
    DC
    1220.0
    [m]
    DC
    1250.0
    [m]
    DC
    1280.0
    [m]
    DC
    1310.0
    [m]
    DC
    1340.0
    [m]
    DC
    1370.0
    [m]
    DC
    1400.0
    [m]
    DC
    1430.0
    [m]
    DC
    1460.0
    [m]
    DC
    1490.0
    [m]
    DC
    1520.0
    [m]
    DC
    1550.0
    [m]
    DC
    1580.0
    [m]
    DC
    1610.0
    [m]
    DC
    1640.0
    [m]
    DC
    1670.0
    [m]
    DC
    1690.5
    [m]
    SWC
    1700.0
    [m]
    DC
    1712.5
    [m]
    SWC
    1730.0
    [m]
    DC
    1760.0
    [m]
    DC
    1790.0
    [m]
    DC
    1800.0
    [m]
    SWC
    1820.0
    [m]
    DC
    1840.0
    [m]
    DC
    1850.0
    [m]
    DC
    1870.0
    [m]
    DC
    1880.0
    [m]
    DC
    1910.0
    [m]
    DC
    1917.0
    [m]
    SWC
    1940.0
    [m]
    DC
    1970.0
    [m]
    DC
    2006.0
    [m]
    DC
    2036.0
    [m]
    SWC
    2048.0
    [m]
    SWC
    2051.5
    [m]
    SWC
    2066.0
    [m]
    DC
    2069.0
    [m]
    DC
    2078.0
    [m]
    DC
    GEOLAB
    2078.0
    [m]
    DC
    2087.0
    [m]
    DC
    GEOLAB
    2093.0
    [m]
    SWC
    2093.0
    [m]
    DC
    GEOLAB
    2096.0
    [m]
    DC
    2102.0
    [m]
    DC
    GEOLAB
    2111.0
    [m]
    DC
    GEOLAB
    2120.0
    [m]
    DC
    GEOLAB
    2126.0
    [m]
    DC
    2129.0
    [m]
    DC
    GEOLAB
    2138.0
    [m]
    DC
    GEOLAB
    2140.5
    [m]
    SWC
    2147.0
    [m]
    DC
    GEOLAB
    2152.5
    [m]
    SWC
    2156.0
    [m]
    DC
    2156.0
    [m]
    DC
    GEOLAB
    2160.5
    [m]
    SWC
    2165.0
    [m]
    DC
    GEOLAB
    2174.0
    [m]
    DC
    GEOLAB
    2177.0
    [m]
    DC
    2183.0
    [m]
    DC
    GEOLAB
    2184.5
    [m]
    SWC
    2186.0
    [m]
    DC
    2192.0
    [m]
    DC
    GEOLAB
    2201.0
    [m]
    DC
    GEOLAB
    2210.0
    [m]
    DC
    GEOLAB
    2216.0
    [m]
    DC
    2219.0
    [m]
    DC
    GEOLAB
    2228.0
    [m]
    DC
    GEOLAB
    2228.0
    [m]
    DC
    2237.0
    [m]
    DC
    GEOLAB
    2237.0
    [m]
    DC
    2246.0
    [m]
    DC
    2246.0
    [m]
    DC
    GEOLAB
    2252.5
    [m]
    SWC
    2255.0
    [m]
    DC
    GEOLAB
    2264.0
    [m]
    DC
    GEOLAB
    2273.0
    [m]
    DC
    GEOLAB
    2276.0
    [m]
    DC
    2282.0
    [m]
    DC
    GEOLAB
    2286.5
    [m]
    SWC
    2288.0
    [m]
    DC
    2291.0
    [m]
    DC
    GEOLAB
    2300.0
    [m]
    DC
    GEOLAB
    2302.0
    [m]
    SWC
    2306.0
    [m]
    DC
    2309.0
    [m]
    DC
    GEOLAB
    2318.0
    [m]
    DC
    GEOLAB
    2323.5
    [m]
    SWC
    2327.0
    [m]
    DC
    GEOLAB
    2336.0
    [m]
    DC
    GEOLAB
    2336.0
    [m]
    DC
    2348.0
    [m]
    DC
    2375.0
    [m]
    SWC
    2381.0
    [m]
    DC
    2411.0
    [m]
    DC
    2441.0
    [m]
    DC
    2471.0
    [m]
    DC
    2482.0
    [m]
    SWC
    2501.0
    [m]
    DC
    2528.0
    [m]
    DC
    2540.0
    [m]
    DC
    2551.5
    [m]
    SWC
    2552.0
    [m]
    DC
    2582.0
    [m]
    SWC
    2591.0
    [m]
    SWC
    2593.0
    [m]
    SWC
    2593.5
    [m]
    SWC
    2595.0
    [m]
    SWC
    2600.0
    [m]
    DC
    2612.0
    [m]
    DC
    2620.0
    [m]
    SWC
    2621.0
    [m]
    DC
    2623.0
    [m]
    SWC
    2637.0
    [m]
    SWC
    2654.0
    [m]
    SWC
    2660.0
    [m]
    SWC
    2687.5
    [m]
    SWC
    2703.5
    [m]
    SWC
    2708.0
    [m]
    SWC
    2711.0
    [m]
    DC
    2725.0
    [m]
    SWC
    2754.0
    [m]
    SWC
    2762.5
    [m]
    SWC
    2771.0
    [m]
    DC
    2787.0
    [m]
    SWC
    2825.0
    [m]
    SWC
    2831.0
    [m]
    DC
    2838.0
    [m]
    SWC
    2874.0
    [m]
    SWC

  • Lithostratigraphy

  • 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
    16.76
    pdf
    25.17
    pdf
    35.39
    pdf
    4.41
    pdf
    11.92
    pdf
    0.47

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL VDL GR
    334
    1264
    CST
    1366
    2337
    ISF BHC GR CAL
    459
    1280
    ISF SLS GR CAL
    106
    470
    ISF SLS GR CAL
    2335
    2903
    ISF SLS GR SP CAL
    1264
    2350
    LDT CNL GR CAL
    2335
    2903
    LDT CNT GR CAL
    1264
    2350
    RFT
    2375
    2897
    RFT
    2583
    2888
    RFT
    2603
    2636
    SHDT
    1600
    2350
    SHDT
    2335
    2903
    VSP
    300
    2900

  • 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
    168.0
    36
    170.0
    0.00
    LOT
    SURF.COND.
    20
    458.7
    26
    474.0
    1.91
    LOT
    INTERM.
    13 3/8
    1264.0
    17 1/2
    1313.0
    1.78
    LOT
    INTERM.
    9 5/8
    2335.0
    12 1/4
    2368.0
    2.00
    LOT
    OPEN HOLE
    2900.0
    8 1/2
    2900.0
    0.00
    LOT

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    420
    1.06
    5.0
    4.8
    WATER BASED
    02.07.1984
    474
    1.08
    6.0
    5.3
    WATER BASED
    02.07.1984
    474
    1.15
    7.0
    7.0
    WATER BASED
    03.07.1984
    474
    1.15
    8.0
    7.2
    WATER BASED
    05.07.1984
    474
    1.15
    7.0
    7.2
    WATER BASED
    05.07.1984
    474
    1.15
    8.0
    8.6
    WATER BASED
    10.07.1984
    474
    1.15
    7.0
    7.0
    WATER BASED
    03.07.1984
    474
    1.15
    7.0
    7.2
    WATER BASED
    05.07.1984
    474
    1.15
    8.0
    8.6
    WATER BASED
    10.07.1984
    474
    1.08
    6.0
    5.3
    WATER BASED
    02.07.1984
    474
    1.15
    8.0
    7.2
    WATER BASED
    05.07.1984
    568
    1.07
    6.0
    8.6
    WATER BASED
    10.07.1984
    900
    1.15
    7.0
    7.5
    WATER BASED
    10.07.1984
    1200
    1.14
    8.0
    10.5
    WATER BASED
    10.07.1984
    1280
    1.15
    8.0
    9.5
    WATER BASED
    12.07.1984
    1280
    1.15
    13.0
    14.4
    WATER BASED
    10.07.1984
    1280
    1.15
    13.0
    14.4
    WATER BASED
    10.07.1984
    1280
    1.15
    8.0
    9.5
    WATER BASED
    12.07.1984
    1302
    1.15
    9.0
    10.1
    WATER BASED
    12.07.1984
    1579
    1.10
    8.0
    8.1
    WATER BASED
    17.07.1984
    1986
    1.14
    11.0
    7.7
    WATER BASED
    17.07.1984
    2310
    1.16
    12.0
    10.5
    WATER BASED
    17.07.1984
    2350
    1.27
    10.0
    11.0
    WATER BASED
    20.07.1984
    2350
    1.21
    12.0
    9.5
    WATER BASED
    17.07.1984
    2350
    1.21
    12.0
    9.5
    WATER BASED
    19.07.1984
    2350
    1.27
    10.0
    11.0
    WATER BASED
    20.07.1984
    2350
    1.27
    14.0
    13.4
    WATER BASED
    20.07.1984
    2350
    1.24
    16.0
    9.5
    WATER BASED
    23.07.1984
    2350
    1.21
    12.0
    9.5
    WATER BASED
    17.07.1984
    2350
    1.21
    12.0
    9.5
    WATER BASED
    19.07.1984
    2350
    1.27
    14.0
    13.4
    WATER BASED
    20.07.1984
    2350
    1.24
    16.0
    9.5
    WATER BASED
    23.07.1984
    2510
    1.25
    17.0
    8.1
    WATER BASED
    25.07.1984
    2580
    1.30
    18.0
    8.6
    WATER BASED
    25.07.1984
    2590
    1.33
    22.0
    9.6
    WATER BASED
    25.07.1984
    2644
    1.33
    21.0
    9.6
    WATER BASED
    31.07.1984
    2886
    1.33
    19.0
    8.1
    WATER BASED
    31.07.1984
    2900
    1.33
    18.0
    8.1
    WATER BASED
    31.07.1984

  • 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
    0.22