Give whole or part of name of wellbore, licence, field, company, discovery etc. E.g. Aker, Statfjord, 24/12, ABP21014. The main content is not searched.
Official name of wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
6406/12-G-1 H
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.
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.
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.
Neptune Energy Norge AS
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.
1815-L
Drilling facility
Norwegian Offshore Directorate's name of the facility which the wellbore was drilled from.
The Norwegian Offshore Directorate's name for the production facility, for development wells.
FENJA G
Drilling days
Number of days from wellbore entry to wellbore completion.
53
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,
02.09.2020
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.
24.10.2020
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.
24.10.2022
Predrilled entry date
Date when the predrilling activity of the wellbore started (see also Entry date).
03.05.2020
Plugged date
Date when plugging operations was finished, as reported by the operator to the Norwegian Offshore Directorate through DDRS (Daily Drilling Reporting System).
24.10.2020
Predrilled completion date
Date when the predrilling activity of the wellbore was completed (see also completion date).
05.05.2020
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.
24.10.2022
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.
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.
MIDDLE 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.
MELKE FM
Kelly bushing elevation [m]
Elevation of the rotary kelly bushing (RKB) above mean sea level.
38.6
Water depth [m]
Depth in metres betweem mean sea level and sea floor.
322.4
Total depth (MD) [m RKB]
Total measured length of wellbore from kelly bushing to total depth (driller's depth).
4235.0
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).
3734.0
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 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.
MELKE FM
Geodetic datum
Reference system for coordinates. Example of legal values: ED50.
ED50
NS degrees
Geographic coordinate of the wellhead, north-south degrees.
64° 1' 50.48'' N
EW degrees
Geographic coordinate of the wellhead, east-west degrees.
6° 45' 2.87'' E
NS UTM [m]
Universal Transverse Mercator coordinate of the wellhead, north-south.
7102548.56
EW UTM [m]
Universal Transverse Mercator coordinate of the wellhead, east-west.
Well 6406/12-G-1 H is an extension of an observation well for the 6406/12-3 A (Bue) oil discovery. The well was drilled on the Fenja field on the southern end of the Halten Terrace in the Norwegian Sea. The primary objective of the exploration section was to confirm oil in Rogn Formation sandstones in the north-eastern part of the Fenja Field, and thereby reduce uncertainty in the resource estimates. Secondary objective was to test Intra Melke Formation sandstones.
Operations and results
A 9 7/8" pilot hole designated 6406-12-U-1 was drilled down to 1240 m to check for shallow gas. No shallow gas was detected.
Well 6406/12-G-1 H was spudded with the semi-submersible installation West Phoenix on 3 May 2020 and drilled to TD at 4235 m (3734 m TVD) in Middle Jurassic (Callovian) claystone belonging to the Melke Formation. The well was drilled in 67.7 days vs. the planned 38.4 days with 13 days (19%) WOW and 8.4 days (12.3%) NPT. Main source of WOW was related to running the 20" casing and while running the 13-5/8" casing. NPT was mainly due to loosing and fishing of Wireline tool string, as well as reduced crew availability due to Covid-19 outbreak on the rig. The well was drilled with seawater and hi-vis pills down to 1244 m, with RheGuard oil-based mud from 1244 to 2477 m, and with Exploradrill oil-based mud from 2477 to TD.
Well 6406/12-G-1 H did not encounter reservoir rocks in the primary Bue/Rogn Formation target. The well did however encounter moveable hydrocarbons in Intra-Melke Formation sandstones just below a thin Spekk Formation. These sandstones were penetrated from 3861 to 3956 m (3376.6 to 3462.6 m TVD). The best sands were in the upper part with progressively poorer sands and increasing claystone interbeds downwards. Petrophysical analysis indicated pay zones down to 3872 m (3386.6 m TVD). A possible Oil-Down-To (ODT) is indicated at 3955.2m MD (3462.5 m TVD) based on weakening fluorescence in core three. The hydrocarbons in the Intra Melke Formation sandstones were in in a different pressure regime compared to both the Pil (intra-Melke Formation sandstones) and the Bue (Rogn Formation) discoveries.
Three cores were cut. Core one was cut from 3868 to 3871.3 m with 51.5% recovery. The core jammed of in what appeared to be a coal bed. Core two was cut from 3871.3 to 3925.9 m with 100% recovery. Core three was cut from 3925.9 to 3962.3 m with 99.4% recovery. MDT oil samples were taken at 3865.8 m (3381.1 m TVD).
The well was permanently abandoned on 24 October 2020 as an oil discovery.
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