Well Data Manager / Well Summary / 21/12- 4

21/12- 4

Decommissioned

Well Header

Well No
21/12- 4
NSTA DEN No
7702
Well Name
--
Drill Seq No
4
Quadrant / Block
21 / 12
Surface Location
57.512372, 0.337646
Source Datum
ED50
Subsea Well
Unknown
Platform
--
Slot No
--
Operator
ENQUEST HEATHER LIMITED
Original Operator
--
Sub Area Operator
ENQUEST HEATHER LIMITED
Licence No
P73
Licence Type
Production
Spud Date
2001-07-12
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (1)

21/12- 4 Original
Abandoned Phase 3 View Log Interpreted Data Survey
Current Intent
Appraisal
Original Intent
Appraisal
Flow Class
Dry Hole
Dev Type
--
Convention
--
Primary Target
CCC
Well Seq
WB1
Datum Type
Rotary Table
Datum Elev (m)
25.298
Ground Elev (m)
--
Water Depth (m)
86.56
TD MD (m)
3026.664
TD TVDSS (m)
3000.451
TD Datum Depth (m)
25.298
TD Datum Type
Rotary Table
Spud Date
2001-07-12
TD Reached
2001-07-29
Completion Date
2001-08-01
Release Date
2005-08-01

Formation Tops (23)

Wellbore Formation Era MD (m) TVDSS (m) Provider
21/12- 4 Unknown 112.000 86.702 BGS LithoStrat Upper
Unknown 976.000 950.684 BGS LithoStrat Upper
Horda Formation Cenozoic 1387.000 1361.676 BGS LithoStrat Upper
Tay Formation Cenozoic 1759.000 1733.642 BGS LithoStrat Upper
Balder Cenozoic 1859.000 1833.621 BGS LithoStrat Upper
Sele Mesozoic 1886.000 1860.615 BGS LithoStrat Upper
Cromarty Member 1891.000 1865.614 BGS LithoStrat Upper
Sele Mesozoic 1903.000 1877.612 BGS LithoStrat Upper
Lista Mesozoic 1907.000 1881.611 BGS LithoStrat Upper
Andrew Member Palaeozoic 1942.000 1916.603 BGS LithoStrat Upper
Lista Mesozoic 2049.000 2023.578 BGS LithoStrat Upper
Maureen Mesozoic 2113.000 2087.562 BGS LithoStrat Upper
Ekofisk Mesozoic 2211.000 2185.525 BGS LithoStrat Upper
Tor Mesozoic 2272.000 2246.497 BGS LithoStrat Upper
Mackerel Formation Mesozoic 2424.000 2398.403 BGS LithoStrat Upper
Rodby Mesozoic 2594.000 2568.223 BGS LithoStrat Upper
Sola Formation 2645.000 2619.167 BGS LithoStrat Upper
Valhall Mesozoic 2679.000 2653.127 BGS LithoStrat Upper
Kimmeridge Clay 2829.000 2803.042 BGS LithoStrat Upper
Heather Mesozoic 2884.000 2858.013 BGS LithoStrat Upper
Fulmar Formation Mesozoic 2893.000 2867.006 BGS LithoStrat Upper
Smith Bank Mesozoic 2924.000 2897.983 BGS LithoStrat Upper
Zechstein Palaeozoic 2969.000 2942.956 BGS LithoStrat Upper

Lithology Intervals

No lithology intervals ingested for this well.

Interpreted Data Inventory (LR / WellStrat)

Open Interpreted Data Log
Wellbore Groups Formations Members Strat Intervals Tops HC Occ Core Cuttings DSTs
21/12- 4 0 0 0 23 23 2 0 0 0 View

Hydrocarbon Occurrence (0)

No hydrocarbon shows or DSTs recorded for this well.

Rock Samples (0)

No cuttings, core, or plug samples recorded for this well.

Wireline Log Inventory (Ingested Curves)

Wellbore Depth Start (m) Depth Stop (m) Typed Curves Auto-scaled Ingested
21/12- 4 183.0323944091797 3017.062744140625 10 0 2026-08-06 17:22:55.30043+00 View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser
21/12- 4
Curve Type Best Mnemonic Source Depth Start (m) Depth Stop (m) Samples
bulk_density RHOZ CGG Digital Well Logs 2477.4144 2993.4408000000003 3387
caliper HCAL CGG Digital Well Logs 2477.4144 2993.4408000000003 3387
comp_sonic DT4P CGG Digital Well Logs 2447.6964000000003 3003.4992 3648
comp_sonic DTCO CGG Digital Well Logs 2447.6964000000003 3003.4992 3648
deep_resistivity AHT90 CGG Digital Well Logs 2479.5480000000002 3017.0628 3528
density_correction HDRA CGG Digital Well Logs 2477.4144 2993.4408000000003 3387
gamma_ray GR CGG Digital Well Logs 183.0324 2987.4972000000002 18282
med_resistivity AHT30 CGG Digital Well Logs 2479.5480000000002 3017.0628 3528
med_resistivity AHT20 CGG Digital Well Logs 2479.5480000000002 3017.0628 3528
med_resistivity AHT60 CGG Digital Well Logs 2479.5480000000002 3017.0628 3528
neutron_por TNPH CGG Digital Well Logs 2434.4376 2989.326 3642
pef PEFZ CGG Digital Well Logs 2477.4144 2993.4408000000003 3387
shallow_resistivity AHT10 CGG Digital Well Logs 2479.5480000000002 3014.1672000000003 3509
shear_sonic DTSM CGG Digital Well Logs 2447.6964000000003 3003.4992 3648
shear_sonic DT4S CGG Digital Well Logs 2447.6964000000003 3003.4992 2623

Survey Inventory (Deviation)

Open full Survey detail
Wellbore Stations Max MD (m) Max TVDSS (m) Survey File
21/12- 4 90 3026.664 3000.595 D:\BigSpatial\nsta_raw\CGG_Deviation\21-12-4 13351bm_CGG-Deviation.xlsx

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