Well Data Manager / Well Summary / 21/15a- 1

21/15a- 1

Decommissioned

Well Header

Well No
21/15a- 1
NSTA DEN No
1209
Well Name
--
Drill Seq No
1
Quadrant / Block
21 / 15 a
Surface Location
57.561938, 0.882575
Source Datum
ED50
Subsea Well
No
Platform
--
Slot No
--
Operator
CNOOC PETROLEUM EUROPE LIMITED
Original Operator
--
Sub Area Operator
CNOOC PETROLEUM EUROPE LIMITED
Licence No
P120
Licence Type
Production
Spud Date
1978-05-09
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (1)

21/15a- 1 Original
Abandoned Phase 3 View Log Interpreted Data Survey
Current Intent
Exploration
Original Intent
Exploration
Flow Class
Gas Show
Dev Type
--
Convention
--
Primary Target
A
Well Seq
WB1
Datum Type
Kelly Bushing
Datum Elev (m)
24.079
Ground Elev (m)
--
Water Depth (m)
100.89
TD MD (m)
4920.996
TD TVDSS (m)
4892.576
TD Datum Depth (m)
24.079
TD Datum Type
Kelly Bushing
Spud Date
1978-05-09
TD Reached
1978-08-15
Completion Date
1978-08-22
Release Date
1982-08-22

Formation Tops (28)

Wellbore Formation Era MD (m) TVDSS (m) Provider
21/15a- 1 Horda Cenozoic 2003.000 1978.696 Lloyds Register
Stronsay Cenozoic 2003.000 1978.696 Lloyds Register
Balder Tuff Cenozoic 2301.000 2276.592 Lloyds Register
Balder Cenozoic 2301.000 2276.592 Lloyds Register
Moray Mesozoic 2301.000 2276.592 Lloyds Register
Sele Mesozoic 2334.000 2309.578 Lloyds Register
Forties Sandstone Mesozoic 2378.000 2353.558 Lloyds Register
Montrose Mesozoic 2437.000 2412.528 Lloyds Register
Lista Mesozoic 2437.000 2412.528 Lloyds Register
Balmoral Sandstone Cenozoic 2454.000 2429.520 Lloyds Register
Glamis Tuff 2649.000 2624.461 Lloyds Register
Andrew Sandstone Cenozoic 2691.000 2666.455 Lloyds Register
Maureen Mesozoic 2746.000 2721.450 Lloyds Register
Maureen Sandstone Mesozoic 2746.000 2721.450 Lloyds Register
Ekofisk Mesozoic 2832.000 2807.432 Lloyds Register
Chalk Mesozoic 2832.000 2807.432 Lloyds Register
Upper Cretaceous Chalk Mesozoic 2904.000 2879.418 Lloyds Register
Rodby Mesozoic 3655.000 3630.231 Lloyds Register
Cromer Knoll Mesozoic 3655.000 3630.231 Lloyds Register
Sola 3679.000 3654.216 Lloyds Register
Valhall Mesozoic 3803.000 3778.182 Lloyds Register
Kimmeridge Clay 4176.000 4150.662 Lloyds Register
Humber Mesozoic 4176.000 4150.662 Lloyds Register
Fulmar Mesozoic 4237.000 4211.244 Lloyds Register
Pentland Mesozoic 4278.000 4251.915 Lloyds Register
Fladen Mesozoic 4278.000 4251.915 Lloyds Register
Zechstein Undifferentiated 4318.000 4291.640 Lloyds Register
Zechstein Palaeozoic 4318.000 4291.640 Lloyds Register

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
21/15a- 1 8 14 6 14 28 5 0 1 0 View

Hydrocarbon Occurrence (2)

Wellbore Category Code Formation / Litho Top MD (m) Base MD (m) Notes
21/15a- 1 Mixed shows OGS * 4175.76 -- 60 m thick
21/15a- 1 Gas shows GS * 4278.1728 -- 40 m thick

Rock Samples (1)

Wellbore Sample Top MD (m) Base MD (m) Key Lab Results Comments Notes
21/15a- 1 Cuttings 496.82 4921.0 -- -- .

Wireline Log Inventory (Ingested Curves)

Wellbore Depth Start (m) Depth Stop (m) Typed Curves Auto-scaled Ingested
21/15a- 1 3.962399959564209 4449.927734375 10 0 2026-08-06 10:14:32.287657+00 View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser
21/15a- 1
Curve Type Best Mnemonic Source Depth Start (m) Depth Stop (m) Samples
bulk_density RHOB CGG Digital Well Logs 3683.3556000000003 4275.4296 3886
caliper CAL CGG Digital Well Logs 3683.2032000000004 4356.5064 4419
caliper CALI CGG Digital Well Logs 3683.2032000000004 4276.8012 3896
caliper CALS CGG Digital Well Logs 4114.9524 4356.6588 1587
comp_sonic DT CGG Digital Well Logs 489.204 4432.0968 18813
deep_resistivity ILD CGG Digital Well Logs 489.8136 4348.124400000001 18229
deep_resistivity LLD CGG Digital Well Logs 4115.1048 4352.0868 1556
density_correction DRHO CGG Digital Well Logs 3683.2032000000004 4275.4296 3887
gamma_ray GR CGG Digital Well Logs 3.9624 4445.965200000001 29148
gamma_ray GRL CGG Digital Well Logs 4114.9524 4347.6672 1528
gamma_ray GRD CGG Digital Well Logs 3683.2032000000004 4270.095600000001 3852
micro_resistivity MSFL CGG Digital Well Logs 4114.9524 4350.562800000001 1547
neutron_por NPHI CGG Digital Well Logs 3683.2032000000004 4272.9912 3871
shallow_resistivity SFLU CGG Digital Well Logs 489.966 4348.276800000001 18228
shallow_resistivity LLS CGG Digital Well Logs 4115.1048 4352.0868 1556
sp SPL CGG Digital Well Logs 4114.9524 4351.02 1550
sp SP CGG Digital Well Logs 489.0516 4449.9276 18601

Survey Inventory (Deviation)

Open full Survey detail
Wellbore Stations Max MD (m) Max TVDSS (m) Survey File
21/15a- 1 1573 4921.000 4890.522 D:\BigSpatial\nsta_raw\CGG_Deviation\21-15a-1 1046ak_CGG-Deviation.xlsx

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