Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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10.11.2024 - 01:25
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2/7-29

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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.
    2/7-29
    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
    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.
    2/7-29
    Seismic location
    Position of spud location on seismic survey lines. SP: shotpoint.
    BPN 10-500 X LINE 1170
    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.
    BP Norway Limited U.A.
    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.
    765-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.
    111
    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,
    18.09.1993
    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.
    06.01.1994
    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.
    06.01.1996
    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.
    24.09.2003
    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.
    YES
    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 JURASSIC
    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.
    ELDFISK FM
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    42.2
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    72.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    4900.0
    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).
    4893.0
    Maximum inclination [°]
    Maximum deviation, in degrees, from a vertical well path.Shown only for released wells.
    7.6
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    170
    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 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.
    ROTLIEGEND GP
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    56° 18' 43.62'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    3° 4' 55.28'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    6240959.65
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    505074.49
    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.
    2124
  • Wellbore history

    General
    Well 2/7-29 was the second commitment well on licence PL 145. The primary objective was to establish the presence, quality and fluid content of Jurassic sandstones in Prospects JU2 and JU7 via cores and wire line logs and to evaluate their productivity and fluid properties if hydrocarbon bearing. The pre-Cretaceous was to be accurately dated via biostratigraphy. The secondary objective was to verify the presence, quality and fluid content of Permian sandstones in Prospect P2, and if possible to test the margin of the Jurassic JU2-B Prospect located stratigraphically between JU2 and JU7.
    Operations and results
    Exploration well 2/7-29 was spudded with the jack-up installation "Maersk Guardian" on 18 September 1993 and drilled to TD at 4900 m in mudstones of the Permian Rotliegend Group. A 9 7/8"pilot hole was drilled to 310 m before opening to 36" to evaluate possible shallow gas. No shallow gas was observed and the 30" casing was set at 302 m. A further 9 7/8" pilot hole was drilled to 1155 m before opening to 26" and the 20" casing set at 1146 m. The well was drilled with seawater and hi-vis sweeps down to 310 m, with bentonite mud from 310 m to 1153 m, and with synthetic oil (ester) based "AQUAMUL B II EBM" mud from 1153 m to TD.
    Hydrocarbons were encountered in 129m of gross (49m net) sandstone in the JU2 prospect (Eldfisk Fm.), the shallower of the Jurassic prospects. Log evaluation established an Oil-Down-To at 4530 m TVDSS. Mean porosities of 12% and permeability in the range 0.01 to 80 mD were measured from core and log data over the pay zone. The mean reserves for the discovery are estimated at 9.3mmbbl (1.48mmcum). Two sand intervals of 12.5 and 19m gross thickness were encountered in the JU7 target. The upper interval contained hydrocarbons. A gross sandstone thickness of 46m was encountered in the Early Permian, although no hydrocarbons were present.
    A total of seven cores were cut, five in the Jurassic JU2 sandstone (Eldfisk Fm.), one in the Jurassic JU7 sandstone (Eldfisk Fm.) and one in the Permian P2 Rotliegend sandstone. JU2 was cored from 4474 to 4549 m and had moderate to good shows to 4539 m. However, two logging runs with the Schlumberger MDT tool showed the JU2 formation to be generally tight.
    JU7 was cored from 4684 to 4703 m and was found to grade to siltstone below 4688 m. Minor shows were present in the sandstone above this depth but from the MDT runs the formation was found to be tight. The Permian P2 Rotliegend sandstone was cored from 4853 m to 4872 m but did not contain hydrocarbons. This formation also proved tight from the second MDT logging run. Two PVT samples and a one-gallon dead-oil sample were obtained in JU2. The one-gallon sample proved to be oil when emptied at well site.
    The well was permanently abandoned as an oil discovery on 6 January 1994.
    Testing
    No drill stem test was performed.
  • 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
    4474.0
    4483.6
    [m ]
    2
    4483.6
    4501.3
    [m ]
    3
    4501.3
    4519.0
    [m ]
    4
    4519.0
    4538.0
    [m ]
    5
    4538.0
    4548.8
    [m ]
    6
    4684.1
    4703.3
    [m ]
    7
    4853.0
    4872.0
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    113.0
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES
  • Core photos

    Core photos
    Core photo at depth: 4474-4479m
    Core photo at depth: 4479-4483m
    Core photo at depth: 4483-4488m
    Core photo at depth: 4488-4493m
    Core photo at depth: 4493-4498m
    4474-4479m
    4479-4483m
    4483-4488m
    4488-4493m
    4493-4498m
    Core photo at depth: 4498-4501m
    Core photo at depth: 4501-4506m
    Core photo at depth: 4506-4511m
    Core photo at depth: 4511-4516m
    Core photo at depth: 4516-4519m
    4498-4501m
    4501-4506m
    4506-4511m
    4511-4516m
    4516-4519m
    Core photo at depth: 4519-4524m
    Core photo at depth: 4524-4529m
    Core photo at depth: 4529-4534m
    Core photo at depth: 4534-4538m
    Core photo at depth: 4538-4543m
    4519-4524m
    4524-4529m
    4529-4534m
    4534-4538m
    4538-4543m
    Core photo at depth: 4543-4548m
    Core photo at depth: 4548-4549m
    Core photo at depth: 4684-4689m
    Core photo at depth: 4689-4694m
    Core photo at depth: 4694-4699m
    4543-4548m
    4548-4549m
    4684-4689m
    4689-4694m
    4694-4699m
    Core photo at depth: 4699-4703m
    Core photo at depth: 4853-4858m
    Core photo at depth: 4858-4863m
    Core photo at depth: 4863-4868m
    Core photo at depth: 4868-4872m
    4699-4703m
    4853-4858m
    4858-4863m
    4863-4868m
    4868-4872m
  • Lithostratigraphy

  • Composite logs

    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    0.43
  • 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
    34.83
  • Logs

    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    CST GR
    4225
    4371
    DIL AS CAL GR
    3126
    4371
    DIL AS GR
    71
    3133
    DIL MSFL GR
    4363
    4906
    DSI LDL CNL GR
    4363
    4892
    MDT GR
    4491
    4688
    MDT GR
    4491
    4868
    MWD
    114
    308
    MWD
    309
    3130
    MWD
    3308
    3483
    MWD - LWD CDR
    114
    310
    MWD - LWD CDR
    309
    1154
    MWD - LWD CDR
    3140
    3308
    MWD - LWD CDR
    3483
    4900
    OBDT GR
    4363
    4907
    VSP
    1160
    4880
  • 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
    302.0
    36
    310.0
    0.00
    LOT
    SURF.COND.
    20
    1146.0
    26
    1155.0
    0.00
    LOT
    INTERM.
    13 3/8
    3124.0
    17 1/2
    3130.0
    0.00
    LOT
    INTERM.
    9 7/8
    4356.0
    12 1/4
    4366.0
    0.00
    LOT
    OPEN HOLE
    4900.0
    8 3/8
    4900.0
    0.00
    LOT
  • Drilling mud

    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    301
    1.05
    WATER BASED
    308
    1.08
    WATER BASED
    554
    1.11
    8.0
    WATER BASED
    949
    1.81
    20.0
    WATER BASED
    1148
    1.15
    5.0
    WATER BASED
    1153
    1.17
    5.0
    OIL BASED
    2028
    1.60
    49.0
    OIL BASED
    2259
    1.59
    48.0
    OIL BASED
    2498
    1.60
    48.0
    OIL BASED
    2705
    1.59
    46.0
    OIL BASED
    2812
    1.60
    47.0
    OIL BASED
    3013
    1.81
    22.0
    WATER BASED
    3130
    0.00
    OIL BASED
    3138
    1.62
    51.0
    OIL BASED
    3308
    1.61
    44.0
    OIL BASED
    3457
    1.62
    43.0
    OIL BASED
    3483
    1.62
    45.0
    OIL BASED
    3738
    1.62
    50.0
    OIL BASED
    3843
    1.62
    50.0
    OIL BASED
    3901
    1.62
    46.0
    OIL BASED
    4009
    1.62
    47.0
    OIL BASED
    4224
    1.62
    48.0
    OIL BASED
    4274
    1.81
    24.0
    WATER BASED
    4291
    1.81
    61.0
    OIL BASED
    4352
    1.81
    56.0
    OIL BASED
    4366
    1.81
    61.0
    OIL BASED
    4366
    1.82
    50.0
    OIL BASED
    4366
    1.82
    53.0
    OIL BASED
    4387
    1.82
    67.0
    OIL BASED
    4395
    1.87
    67.0
    OIL BASED
    4501
    1.87
    60.0
    OIL BASED
    4519
    1.87
    59.0
    OIL BASED
    4574
    1.87
    59.0
    OIL BASED
    4599
    1.87
    61.0
    OIL BASED
    4684
    1.87
    68.0
    OIL BASED
    4703
    1.87
    62.0
    OIL BASED
    4900
    1.90
    67.0
    OIL BASED
  • Thin sections at the Norwegian Offshore Directorate

    Thin sections at the Norwegian Offshore Directorate
    Depth
    Unit
    4544.00
    [m ]
    4540.65
    [m ]
    4532.00
    [m ]
    4529.65
    [m ]
    4523.30
    [m ]
    4517.65
    [m ]
    4514.00
    [m ]
    4508.85
    [m ]
    4506.00
    [m ]
    4504.05
    [m ]
    4500.80
    [m ]
    4493.35
    [m ]
    4490.70
    [m ]
    4487.85
    [m ]
    4482.65
    [m ]
    4477.65
    [m ]
  • 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