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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34/7-15 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.
    34/7-15 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
    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.
    34/7-15
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    G/E 83 ROW 200 KOL 256
    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.
    638-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.
    104
    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,
    23.05.1990
    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.
    03.09.1990
    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.
    03.09.1992
    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.
    27.02.2004
    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
    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.
    26.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    306.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    4646.0
    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).
    4333.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    47.4
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    155
    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 JURASSIC
    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.
    DRAKE FM
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    61° 24' 38.59'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    2° 12' 53.22'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6808951.10
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    458078.95
    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.
    1544

  • Wellbore history
    General
    Well 34/7-15 S was the first well drilled on the east flank of the 34/7 block. This part of the block has mainly been subsiding during Late Jurassic, Early and Late Cretaceous on the Tampen high and hence not been exposed so heavily to the erosive events, whereas the structures elsewhere in the block have suffered periods of erosion and non-deposition. The westward tilting of the Tampen area developed in these periods, and a large part of the erosion products were deposited to the west. The eastern flank received coarse clastic sediments, developed as fans next to the Inner Snorre Fault. The Middle Jurassic Brent Group probably shows the same development as elsewhere in the Tampen area. Seismic anomalies indicate possibilities for shallow gas. The primary objectives of well 34/7-15 S were to test the prospectivity of the Brent Group, and thereby test the sealing capacity of the Inner Snorre Fault; to test the stratigraphy and prospectivity of the Early Cretaceous and Late Jurassic sediments; and to obtain better seismic and velocity control of the Cretaceous and Jurassic sediments. The well fulfilled the work commitment of PL 089.
    Operations and results
    Wildcat well 34/7-15 S was spudded with the semi-submersible rig Treasure Saga 23 May 1990 and drilled to TD at 4646 m in the Early Jurassic Drake Formation. The well was drilled as a deviated well to the east with kick-off point at 2900 m. It was drilled with seawater and gel down to 1038 m and with KCl mud from 1038 m to TD. No shallow gas was encountered.
    The sandstones of the Brent Group (Tarbert Formation) came in at 4376 m. Oil shows were recorded in thin Intra Draupne and Intra Heather Sandstones. The Brent Group proved to be water bearing with some insignificant oil shows. A total of 250 sidewall cores were attempted and 151 cores were recovered. One core was cut in the Tarbert Formation from 4379 m to 4394 m. One FMT segregated sample was taken at 3599.5 m in one of the Intra Draupne Formation Sandstones. It recovered water and mud. The well was permanently abandoned 3 September 1990 as a dry hole with  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]
    440.00
    4644.00

  • 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
    4379.0
    4393.2
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    14.2
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Lithostratigraphy
    Lithostratigraphy
    Top depth [mMD RKB]
    Lithostrat. unit
    332
    1100
    1114
    1367
    1450
    1804
    1804
    1832
    1977
    1977
    2246
    2957
    3165
    3165
    3397
    3440
    3440
    3550
    3555
    3581
    3590
    3597
    3601
    3656
    3667
    3675
    3677
    3802
    3805
    3846
    3848
    3855
    3901
    3908
    4120
    4123
    4168
    4172
    4376
    4376
    4434
    4460
    4513
    4571
    4571

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.66

  • Geochemical information
    Geochemical information
    Document name
    Document format
    Document size [MB]
    pdf
    1.49

  • 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
    18.12

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CBL VDL GR
    358
    2604
    CBL VDL GR
    2316
    3922
    CBL VDL GR
    3817
    4455
    CDL CNL GR
    2604
    3935
    CORGUN
    0
    0
    CORGUN
    0
    0
    CORGUN
    0
    0
    DIFL ACL CDL GR
    953
    2604
    DIFL ACL CDL GR
    4455
    4646
    DIFL ACL GR
    3785
    4431
    DIFL CDL CNL GR
    3919
    4482
    DIPLOG
    2609
    3910
    DLL ACL GR
    2604
    3933
    FMT
    3554
    3906
    FMT
    3921
    4439
    MWD - GR RES DIR
    428
    4487
    VSP
    800
    4590

  • 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
    428.0
    36
    433.0
    0.00
    LOT
    INTERM.
    20
    954.0
    26
    970.0
    1.93
    LOT
    INTERM.
    13 3/8
    2606.0
    17 1/2
    2621.0
    1.73
    LOT
    INTERM.
    9 5/8
    3921.0
    12 1/4
    3936.0
    1.98
    LOT
    LINER
    7
    4455.0
    8 1/2
    4487.0
    1.65
    LOT
    OPEN HOLE
    4646.0
    5 7/8
    4646.0
    0.00
    LOT

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    358
    1.05
    WATER BASED
    06.06.1990
    432
    1.05
    WATER BASED
    06.06.1990
    433
    1.05
    WATER BASED
    06.06.1990
    433
    1.05
    WATER BASED
    06.06.1990
    433
    1.05
    WATER BASED
    06.06.1990
    687
    1.12
    12.0
    36.0
    WATER BASED
    06.06.1990
    970
    1.15
    6.0
    28.0
    WATER BASED
    06.06.1990
    970
    1.18
    8.0
    34.0
    WATER BASED
    06.06.1990
    970
    1.18
    8.0
    34.0
    WATER BASED
    06.06.1990
    970
    1.10
    WATER BASED
    06.06.1990
    970
    0.00
    WATER BASED
    06.06.1990
    1038
    1.12
    26.0
    12.0
    WATER BASED
    11.06.1990
    1381
    1.20
    29.0
    9.0
    WATER BASED
    11.06.1990
    1709
    1.20
    32.0
    11.0
    WATER BASED
    11.06.1990
    1999
    1.27
    28.0
    9.0
    WATER BASED
    11.06.1990
    2120
    1.30
    36.0
    10.0
    WATER BASED
    11.06.1990
    2230
    1.38
    37.0
    14.0
    WATER BASED
    18.06.1990
    2350
    1.42
    38.0
    14.0
    WATER BASED
    18.06.1990
    2420
    1.42
    30.0
    12.0
    WATER BASED
    18.06.1990
    2555
    1.45
    46.0
    13.0
    WATER BASED
    18.06.1990
    2839
    1.45
    28.0
    15.0
    WATER BASED
    28.06.1990
    2839
    1.45
    28.0
    15.0
    WATER BASED
    04.07.1990
    2900
    1.45
    27.0
    13.0
    WATER BASED
    04.07.1990
    2900
    1.45
    27.0
    13.0
    WATER BASED
    28.06.1990
    2956
    1.45
    34.0
    31.0
    WATER BASED
    04.07.1990
    2956
    1.45
    34.0
    31.0
    WATER BASED
    28.06.1990
    2990
    1.45
    37.0
    35.0
    WATER BASED
    28.06.1990
    2990
    1.45
    37.0
    35.0
    WATER BASED
    04.07.1990
    3057
    1.45
    34.0
    36.0
    WATER BASED
    28.06.1990
    3057
    1.45
    34.0
    36.0
    WATER BASED
    04.07.1990
    3153
    1.45
    33.0
    32.0
    WATER BASED
    04.07.1990
    3153
    1.45
    33.0
    32.0
    WATER BASED
    28.06.1990
    3236
    1.45
    33.0
    31.0
    WATER BASED
    28.06.1990
    3236
    1.45
    33.0
    31.0
    WATER BASED
    04.07.1990
    3351
    1.48
    31.0
    36.0
    WATER BASED
    04.07.1990
    3376
    1.48
    31.0
    36.0
    WATER BASED
    04.07.1990
    3404
    1.48
    34.0
    37.0
    WATER BASED
    04.07.1990
    3520
    1.50
    34.0
    38.0
    WATER BASED
    04.07.1990
    3581
    1.52
    34.0
    34.0
    WATER BASED
    04.07.1990
    3599
    1.58
    34.0
    34.0
    WATER BASED
    01.08.1990
    3639
    1.52
    33.0
    31.0
    WATER BASED
    04.07.1990
    3639
    1.52
    35.0
    39.0
    WATER BASED
    05.07.1990
    3639
    1.52
    35.0
    36.0
    WATER BASED
    09.07.1990
    3678
    1.54
    37.0
    36.0
    WATER BASED
    10.07.1990
    3701
    1.58
    35.0
    31.0
    WATER BASED
    12.07.1990
    3701
    1.58
    33.0
    30.0
    WATER BASED
    12.07.1990
    3729
    1.54
    39.0
    37.0
    WATER BASED
    10.07.1990
    3729
    1.54
    36.0
    35.0
    WATER BASED
    10.07.1990
    3734
    1.58
    33.0
    31.0
    WATER BASED
    13.07.1990
    3747
    1.58
    31.0
    25.0
    WATER BASED
    16.07.1990
    3768
    1.58
    33.0
    29.0
    WATER BASED
    16.07.1990
    3782
    1.58
    35.0
    30.0
    WATER BASED
    16.07.1990
    3782
    1.58
    36.0
    32.0
    WATER BASED
    19.07.1990
    3782
    1.58
    36.0
    32.0
    WATER BASED
    01.08.1990
    3936
    1.58
    34.0
    17.0
    WATER BASED
    01.08.1990
    3936
    1.58
    30.0
    22.0
    WATER BASED
    01.08.1990
    3936
    1.58
    31.0
    22.0
    WATER BASED
    01.08.1990
    3936
    1.58
    36.0
    33.0
    WATER BASED
    01.08.1990
    3936
    1.58
    36.0
    34.0
    WATER BASED
    01.08.1990
    3936
    1.58
    34.0
    17.0
    WATER BASED
    31.07.1990
    3936
    1.58
    27.0
    20.0
    WATER BASED
    01.08.1990
    3982
    1.58
    29.0
    27.0
    WATER BASED
    31.07.1990
    3982
    1.58
    29.0
    27.0
    WATER BASED
    01.08.1990
    4029
    1.58
    32.0
    28.0
    WATER BASED
    01.08.1990
    4059
    1.58
    30.0
    25.0
    WATER BASED
    01.08.1990
    4092
    1.58
    23.0
    18.0
    WATER BASED
    01.08.1990
    4166
    1.64
    23.0
    17.0
    WATER BASED
    01.08.1990
    4243
    1.64
    23.0
    20.0
    WATER BASED
    01.08.1990
    4265
    1.70
    24.0
    10.0
    WATER BASED
    20.08.1990
    4265
    1.70
    28.0
    11.0
    WATER BASED
    21.08.1990
    4265
    1.70
    28.0
    11.0
    WATER BASED
    21.08.1990
    4265
    1.70
    26.0
    9.0
    WATER BASED
    17.08.1990
    4293
    1.68
    24.0
    18.0
    WATER BASED
    03.08.1990
    4326
    1.70
    23.0
    15.0
    WATER BASED
    03.08.1990
    4379
    1.70
    21.0
    16.0
    WATER BASED
    03.08.1990
    4439
    1.70
    28.0
    11.0
    WATER BASED
    21.08.1990
    4439
    1.70
    29.0
    10.0
    WATER BASED
    22.08.1990
    4439
    1.70
    29.0
    15.0
    WATER BASED
    22.08.1990
    4447
    1.72
    21.0
    12.0
    WATER BASED
    13.08.1990
    4447
    1.70
    28.0
    13.0
    WATER BASED
    14.08.1990
    4447
    1.70
    28.0
    14.0
    WATER BASED
    14.08.1990
    4447
    1.70
    27.0
    13.0
    WATER BASED
    15.08.1990
    4447
    1.70
    27.0
    13.0
    WATER BASED
    14.08.1990
    4490
    1.50
    23.0
    10.0
    WATER BASED
    23.08.1990
    4536
    1.50
    20.0
    10.0
    WATER BASED
    28.08.1990
    4581
    1.50
    19.0
    8.0
    WATER BASED
    28.08.1990
    4615
    1.50
    20.0
    8.0
    WATER BASED
    28.08.1990
    4644
    1.50
    19.0
    9.0
    WATER BASED
    30.08.1990
    4646
    1.50
    19.0
    9.0
    WATER BASED
    30.08.1990
    4646
    1.50
    19.0
    9.0
    WATER BASED
    30.08.1990
    4646
    1.50
    19.0
    11.0
    WATER BASED
    31.08.1990
    4646
    1.50
    21.0
    8.0
    WATER BASED
    04.09.1990
    4646
    1.50
    21.0
    8.0
    WATER BASED
    04.09.1990
    4646
    1.50
    20.0
    11.0
    WATER BASED
    04.09.1990

  • 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