20/04- 1

Decommissioned

Well Header

Well No
20/04- 1
NSTA DEN No
720
Well Name
--
Drill Seq No
1
Quadrant / Block
20 / 4
Surface Location
57.883599, -0.347300
Source Datum
ED50
Subsea Well
No
Platform
--
Slot No
--
Operator
CHRYSAOR PETROLEUM COMPANY U.K. LIMITED
Original Operator
--
Sub Area Operator
CHRYSAOR PETROLEUM COMPANY U.K. LIMITED
Licence No
P225
Licence Type
Production
Spud Date
1975-06-26
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (2)

20/04- 1 Original parent: 20/04- 1J
Current Intent
Exploration
Original Intent
Exploration
Flow Class
Oil Show
Dev Type
--
Convention
--
Primary Target
--
Well Seq
WB1
Datum Type
Kelly Bushing
Datum Elev (m)
23.470
Ground Elev (m)
--
Water Depth (m)
108.81
TD MD (m)
3663.391
TD TVDSS (m)
3639.617
TD Datum Depth (m)
23.470
TD Datum Type
Kelly Bushing
Spud Date
1975-06-26
TD Reached
1975-08-07
Completion Date
1975-08-15
Release Date
1979-08-15
20/04- 1J Sidetrack J
Abandoned Phase 3 Survey
Current Intent
Exploration
Original Intent
Exploration
Flow Class
--
Dev Type
--
Convention
--
Primary Target
--
Well Seq
--
Datum Type
Rotary Table
Datum Elev (m)
23.470
Ground Elev (m)
--
Water Depth (m)
108.81
TD MD (m)
2004.060
TD TVDSS (m)
2004.060
TD Datum Depth (m)
--
TD Datum Type
--
Spud Date
1975-06-10
TD Reached
1975-06-19
Completion Date
1975-06-23
Release Date
1979-06-23

Formation Tops (31)

Wellbore Formation Era MD (m) TVDSS (m) Provider
20/04- 1 Balder Cenozoic 755.000 731.530 Lloyds Register
Balder Tuff Cenozoic 755.000 731.530 Lloyds Register
Moray Mesozoic 755.000 731.530 Lloyds Register
Beauly Cenozoic 777.000 753.530 Lloyds Register
Upper Dornoch Sandstone Cenozoic 842.000 818.530 Lloyds Register
Dornoch Mesozoic 842.000 818.530 Lloyds Register
Sele Mesozoic 980.000 956.530 Lloyds Register
Forties Sandstone Mesozoic 1198.000 1174.530 Lloyds Register
Montrose Mesozoic 1251.000 1227.530 Lloyds Register
Lista Mesozoic 1251.000 1227.530 Lloyds Register
Balmoral Sandstone Cenozoic 1295.000 1271.530 Lloyds Register
Glamis Tuff 1446.000 1422.530 Lloyds Register
Andrew Sandstone Cenozoic 1564.000 1540.530 Lloyds Register
Maureen Sandstone Mesozoic 1793.000 1769.530 Lloyds Register
Maureen Mesozoic 1793.000 1769.530 Lloyds Register
Chalk Mesozoic 1939.000 1915.530 Lloyds Register
Upper Cretaceous Chalk Mesozoic 1939.000 1915.530 Lloyds Register
Rodby Mesozoic 2477.000 2453.530 Lloyds Register
Cromer Knoll Mesozoic 2477.000 2453.530 Lloyds Register
Sola 2504.000 2480.530 Lloyds Register
Valhall Mesozoic 2605.000 2581.530 Lloyds Register
Humber Mesozoic 2741.000 2717.530 Lloyds Register
Kimmeridge Clay 2741.000 2717.530 Lloyds Register
Piper Mesozoic 2774.000 2750.530 Lloyds Register
Sgiath Mesozoic 2793.000 2769.530 Lloyds Register
Smith Bank Mesozoic 2960.000 2936.530 Lloyds Register
Heron Palaeozoic 2960.000 2936.530 Lloyds Register
Zechstein Palaeozoic 3357.000 3333.530 Lloyds Register
Turbot Anhydrite Palaeozoic 3357.000 3333.530 Lloyds Register
Old Red Palaeozoic 3473.000 3449.530 Lloyds Register
Old Red Sandstone 3473.000 3449.530 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
20/04- 1 8 16 7 21 31 6 0 1 0 View
20/04- 1J 0 0 0 0 0 0 0 0 0

Hydrocarbon Occurrence (1)

Wellbore Category Code Formation / Litho Top MD (m) Base MD (m) Notes
20/04- 1 Oil shows OS * 2741.0664 -- 23 m thick

Rock Samples (1)

Wellbore Sample Top MD (m) Base MD (m) Key Lab Results Comments Notes
20/04- 1 Cuttings 480.06 3663.7 -- -- .

Wireline Log Inventory (Ingested Curves)

No wireline log curves ingested for this well.

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser

No scanned LAS source files matched to this well.

Survey Inventory (Deviation)

Open full Survey detail
Wellbore Stations Max MD (m) Max TVDSS (m) Survey File
20/04- 1 0 -- -- --
20/04- 1J 0 -- -- --

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