Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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27.04.2024 - 01:34
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34/4-4

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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.
    34/4-4
    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).
    APPRAISAL
    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.
    34/4-4
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    SG 8020 - 201 SP 2295
    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.
    Saga Petroleum ASA
    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.
    315-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.
    146
    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,
    11.09.1982
    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.
    03.02.1983
    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.
    03.02.1985
    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.
    21.12.2012
    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
    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
    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.
    LATE TRIASSIC
    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.
    LUNDE FM
    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.
    345.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    3800.0
    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).
    3800.0
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    122
    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.
    MIDDLE 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.
    TEIST FM (INFORMAL)
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    61° 30' 20.85'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 14' 9.54'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6819527.92
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    459334.80
    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.
    41

  • Wellbore history
    General
    The primary objective of the exploration well 34/4 4 was to drill the untested Triassic sequence in the fault blocks west of well 34/4-1. The well location was chosen to be stratigraphically higher relative to the Triassic sequence in well 34/4-1. The purpose of the well location was also to penetrate and core the maximum oil column above the tentative oil water contact interpreted in well 34/4-1 and to test possible lateral fluid communication with 34/4-1.
    Operations and results
    Wildcat well 34/4-4 was spudded with the semi-submersible installation Dyvi Alpha on 11 September 1982 and drilled to TD at 3800 in Middle Triassic sediments, Teist Formation. As much as 15 % of total rig time was WOW due to bad weather. While coring, after core number 12 was taken, the mud was replaced with seawater by accident and caused a kick, resulting in a 20 bbls influx. The well was drilled with spud mud down to 493 m, with gel mud from 493 m to 1212 m, with gypsum/polymer mud from 1212 m to 2116 m, with Lignosulphonate mud from 2116 m to 2475 m, and with lignosulphonate/Chem-X mud from 2475 m to TD.
    First oil shows were recorded on cuttings from thin sandstone stringers below 2075 m, accompanied by increased gas readings. Sidewall cores from siltstone beds between 2100 and 2414 m also occasionally had oil shows.
    The Early Cretaceous Åsgard Formation rested unconformably on the Late Triassic Lunde Formation at 2425 m. The Lunde Formation sandstones were oil bearing down to the oil water contact at 2586 m. The OWC was set mostly on the intersection of the oil and water pressure gradients from RFT data. The oil bearing sand was separated from the water zone by a 22 m thick residual oil zone between 2586 and 2608 m. This interval had an average net sand porosity of 22%. In the water wet sand interval between 2608 and 2794 m, the average net sand porosity was 21%. No shows were recorded below 2612 m.
    A total of 180 m core was cut in 15 cores from 2433.7 to 2638.4 m in the Lunde Formation oil reservoir and down across the OWC. The core-log depth shifts were significant with the cored depth for core 1 being + 9.5 m relative to logger's depth. The shifts for the following cores decreased in a relatively regular fashion with increasing core depth to + 4.5 m for core 15. The RFT tool was run and good pressure data was obtained. RFT segregated fluid samples were taken at 2431.5 m (oil and gas), 2489.0 m (mud filtrate), 2573.0 m (oil and mud filtrate), 2605.5 m (mud filtrate), 2643.5 m (mud filtrate), and 2715.0 (water and mud filtrate).
    The well was permanently abandoned on 6 February 1985 as an oil appraisal well.
    Testing
    Four DST's were performed in the Late Triassic Lund Formation sandstones. The test results were considered to be some of the best so far in the North Sea.
    DST 1 tested the water zone from the interval 2618.0 - 2626.0 m. At stable conditions in the final flow the well produced 83.5 m3 water/day through a 32/64" flow. Bottom hole temperature was 95.6 deg C.
    DST 2 tested the interval 2572.5 - 2577.5 m. At stable conditions in the main flow the well produced 461 Sm3 oil/day through a 24/64" choke. The separator GOR was 94 Sm3/Sm3. Bottom hole temperature was 96.1 deg C. When opening up to a 52/64" choke the production reached 1606 Sm3 oil/day. No water or sand was produced.
    DST 3 tested the interval 2512.8 - 2515.8 m. After perforations the test was suspended for a week due to bad weather. The interval was re-perforated before the test was resumed. The production in this test never stabilized, possibly due to formation damage caused by the interruption period. An average oil rate of 54 Sm3/day was estimated. The oil density was 0.83 g/cm3. No water or sand was produced. Bottom hole temperature was 94.4 deg C.
    DST 4 tested the interval 2429.0 - 2437.0 m. During 8 hours main flow through a 44/64" choke the rated declined slowly from 1844 Sm3 to 1717 Sm3 /day. The separator GOR was 70 Sm3/Sm3. The dead oil density was 0.82 - 0.83 g/cm3. No water or sand was produced. Bottom hole temperature was 93.3 deg C.

  • 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]
    500.00
    3794.00

  • 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
    2433.7
    2444.1
    [m ]
    2
    2444.8
    2457.0
    [m ]
    3
    2457.9
    2471.3
    [m ]
    4
    2472.2
    2482.5
    [m ]
    5
    2482.6
    2486.0
    [m ]
    6
    2489.3
    2501.9
    [m ]
    7
    2501.9
    2519.5
    [m ]
    8
    2519.5
    2535.0
    [m ]
    9
    2535.0
    2548.6
    [m ]
    10
    2548.6
    2566.8
    [m ]
    11
    2566.8
    2576.1
    [m ]
    12
    2578.3
    2595.4
    [m ]
    13
    2596.2
    2607.5
    [m ]
    14
    2614.4
    2621.3
    [m ]
    15
    2624.0
    2634.6
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    182.4
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 2433-2437m
    Core photo at depth: 2437-2439m
    Core photo at depth: 2440-2442m
    Core photo at depth: 2443-2444m
    Core photo at depth: 2444-2447m
    2433-2437m
    2437-2439m
    2440-2442m
    2443-2444m
    2444-2447m
    Core photo at depth: 2448-2450m
    Core photo at depth: 2451-2454m
    Core photo at depth: 2455-2456m
    Core photo at depth: 2457-2460m
    Core photo at depth: 2461-2463m
    2448-2450m
    2451-2454m
    2455-2456m
    2457-2460m
    2461-2463m
    Core photo at depth: 2464-2467m
    Core photo at depth: 2468-2471m
    Core photo at depth: 2472-2475m
    Core photo at depth: 2475-2479m
    Core photo at depth: 2479-2482m
    2464-2467m
    2468-2471m
    2472-2475m
    2475-2479m
    2479-2482m
    Core photo at depth: 2482-2486m
    Core photo at depth: 2486-2488m
    Core photo at depth: 2489-2492m
    Core photo at depth: 2492-2496m
    Core photo at depth: 2496-2499m
    2482-2486m
    2486-2488m
    2489-2492m
    2492-2496m
    2496-2499m
    Core photo at depth: 2499-2501m
    Core photo at depth: 2501-2505m
    Core photo at depth: 2505-2507m
    Core photo at depth: 2508-2511m
    Core photo at depth: 2511-2514m
    2499-2501m
    2501-2505m
    2505-2507m
    2508-2511m
    2511-2514m
    Core photo at depth: 2514-2517m
    Core photo at depth: 2518-2519m
    Core photo at depth: 2519-2522m
    Core photo at depth: 2522-2525m
    Core photo at depth: 2525-2528m
    2514-2517m
    2518-2519m
    2519-2522m
    2522-2525m
    2525-2528m
    Core photo at depth: 2528-2532m
    Core photo at depth: 2532-2535m
    Core photo at depth: 2535-2537m
    Core photo at depth: 2537-2539m
    Core photo at depth: 2540-2547m
    2528-2532m
    2532-2535m
    2535-2537m
    2537-2539m
    2540-2547m
    Core photo at depth: 2547-2548m
    Core photo at depth: 2548-2551m
    Core photo at depth: 2551-2554m
    Core photo at depth: 2555-2558m
    Core photo at depth: 2558-2562m
    2547-2548m
    2548-2551m
    2551-2554m
    2555-2558m
    2558-2562m
    Core photo at depth: 2562-2565m
    Core photo at depth: 2565-2566m
    Core photo at depth: 2566-2570m
    Core photo at depth: 2570-2573m
    Core photo at depth: 2573-2576m
    2562-2565m
    2565-2566m
    2566-2570m
    2570-2573m
    2573-2576m
    Core photo at depth: 2578-2581m
    Core photo at depth: 2581-2585m
    Core photo at depth: 2585-2588m
    Core photo at depth: 2592-2594m
    Core photo at depth: 2594-2595m
    2578-2581m
    2581-2585m
    2585-2588m
    2592-2594m
    2594-2595m
    Core photo at depth: 2596-2598m
    Core photo at depth: 2599-2603m
    Core photo at depth: 2603-2606m
    Core photo at depth: 2606-2607m
    Core photo at depth: 2614-2617m
    2596-2598m
    2599-2603m
    2603-2606m
    2606-2607m
    2614-2617m
    Core photo at depth: 2617-2621m
    Core photo at depth: 2624-2627m
    Core photo at depth: 2627-2631m
    Core photo at depth: 2631-2634m
    Core photo at depth: 2603-2606m
    2617-2621m
    2624-2627m
    2627-2631m
    2631-2634m
    2603-2606m
    Core photo at depth: 2606-2607m
    Core photo at depth: 2614-2617m
    Core photo at depth: 2617-2621m
    Core photo at depth: 2624-2627m
    Core photo at depth: 2627-2631m
    2606-2607m
    2614-2617m
    2617-2621m
    2624-2627m
    2627-2631m
    Core photo at depth: 2631-2634m
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    2631-2634m

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    2444.9
    [m]
    C
    RRI
    2833.7
    [m]
    SWC
    RRI
    2851.5
    [m]
    SWC
    RRI
    2925.6
    [m]
    SWC
    RRI
    2930.4
    [m]
    SWC
    RRI
    2938.2
    [m]
    SWC
    RRI
    3359.2
    [m]
    SWC
    RRI

  • Oil samples at the Norwegian Offshore Directorate
    Oil samples at the Norwegian Offshore Directorate
    Test type
    Bottle number
    Top depth
    MD [m]
    Bottom depth
    MD [m]
    Fluid type
    Test time
    Samples available
    DST
    DST2
    2572.00
    2578.00
    31.12.1982 - 08:30
    YES
    DST
    DST4
    2429.00
    2437.00
    OIL
    22.01.1983 - 22:00
    YES

  • Lithostratigraphy

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    1.01
    pdf
    8.32
    pdf
    1.83

  • 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
    23.91

  • Drill stem tests (DST)
    Drill stem tests (DST)
    Test number
    From depth MD
    [m]
    To depth MD
    [m]
    Choke size
    [mm]
    1.0
    2618
    2626
    12.7
    2.0
    2572
    2578
    10.3
    3.0
    2512
    2516
    6.3
    4.0
    2429
    2437
    17.5
    Drill stem tests (DST)
    Test number
    Final shut-in pressure
    [MPa]
    Final flow pressure
    [MPa]
    Bottom hole pressure
    [MPa]
    Downhole temperature
    [°C]
    1.0
    2.0
    3.0
    4.0
    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
    2.0
    461
    94
    3.0
    54
    4.0
    1749
    200000
    0.830
    70

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL VDL GR
    1850
    2083
    CBL VDL GR CCL
    1750
    2785
    CST
    2105
    2428
    CST
    2639
    2794
    CST
    2810
    3359
    CST
    3363
    3776
    DIP
    2097
    2793
    DIP
    2788
    3797
    DLL MSFL NGS
    2097
    2793
    ISF DDBHC GR
    2098
    2796
    ISF DDBHC MSFL NGL
    2788
    3798
    ISF LSS SP GR
    494
    1213
    ISF LSS SP GR
    1213
    1713
    ISF LSS SP GR
    1213
    2115
    LDL CNL CAL GR
    494
    1213
    LDL CNL GR
    1213
    2115
    LDL CNL GR
    2098
    2797
    LDL CNL GR
    2788
    3797
    RFT
    2432
    2762
    RFT
    2893
    3491
    VSP
    500
    3798

  • 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
    493.0
    36
    493.0
    0.00
    LOT
    SURF.COND.
    20
    1200.0
    26
    1212.0
    1.26
    LOT
    INTERM.
    13 3/8
    2098.0
    17 1/2
    2115.0
    1.59
    LOT
    INTERM.
    9 5/8
    2792.0
    12 1/4
    2800.0
    1.87
    LOT
    OPEN HOLE
    3800.0
    8 1/2
    3800.0
    0.00
    LOT

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    530
    1.03
    15.0
    waterbased
    900
    1.11
    7.0
    waterbased
    1070
    1.14
    7.0
    waterbased
    1610
    1.13
    9.0
    waterbased
    1910
    1.28
    18.0
    waterbased
    2140
    1.42
    27.0
    waterbased
    2350
    1.50
    25.0
    waterbased
    2810
    1.60
    23.0
    waterbased
    3360
    1.62
    16.0
    waterbased
    3620
    1.60
    20.0
    waterbased

  • 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