Well Data Manager / Well Summary / 30/25a- 4

30/25a- 4

Decommissioned

Well Header

Well No
30/25a- 4
NSTA DEN No
3598
Well Name
--
Drill Seq No
4
Quadrant / Block
30 / 25 a
Surface Location
56.236661, 2.806350
Source Datum
ED50
Subsea Well
No
Platform
--
Slot No
--
Operator
WOODSIDE ENERGY (GREAT BRITAIN) LIMITED
Original Operator
--
Sub Area Operator
WOODSIDE ENERGY (GREAT BRITAIN) LIMITED
Licence No
P73
Licence Type
Production
Spud Date
1988-10-10
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (1)

30/25a- 4 Original
Abandoned Phase 3 View Log Interpreted Data Survey
Current Intent
Exploration
Original Intent
Exploration
Flow Class
Oil Well
Dev Type
--
Convention
--
Primary Target
D
Well Seq
WB1
Datum Type
Kelly Bushing
Datum Elev (m)
25.908
Ground Elev (m)
--
Water Depth (m)
79.25
TD MD (m)
4134.307
TD TVDSS (m)
1933.040
TD Datum Depth (m)
26.213
TD Datum Type
Kelly Bushing
Spud Date
1988-10-10
TD Reached
1988-11-20
Completion Date
1988-11-28
Release Date
1992-11-28

Formation Tops (23)

Wellbore Formation Era MD (m) TVDSS (m) Provider
30/25a- 4 Stronsay Cenozoic 106.000 80.092 Lloyds Register
Horda Cenozoic 106.000 80.092 Lloyds Register
Moray Mesozoic 3040.000 3013.705 Lloyds Register
Balder Cenozoic 3040.000 3013.705 Lloyds Register
Balder Tuff Cenozoic 3040.000 3013.705 Lloyds Register
Sele Mesozoic 3057.000 3030.698 Lloyds Register
Montrose Mesozoic 3109.000 3082.674 Lloyds Register
Lista Mesozoic 3109.000 3082.674 Lloyds Register
Maureen Mesozoic 3155.000 3128.654 Lloyds Register
Chalk Mesozoic 3203.000 3176.636 Lloyds Register
Ekofisk Mesozoic 3203.000 3176.636 Lloyds Register
Upper Cretaceous Chalk Mesozoic 3289.000 3262.609 Lloyds Register
Lower Cretaceous Undifferentiated Mesozoic 4021.000 3994.079 Lloyds Register
Cromer Knoll Mesozoic 4021.000 3994.079 Lloyds Register
Kimmeridge Clay 4109.000 4081.931 Lloyds Register
Humber Mesozoic 4109.000 4081.931 Lloyds Register
Zechstein Palaeozoic 4333.000 4305.549 Lloyds Register
Zechstein Undifferentiated 4333.000 4305.549 Lloyds Register
Kupferschiefer Palaeozoic 4367.000 4339.488 Lloyds Register
Rotliegend 4368.000 4340.486 Lloyds Register
Auk 4368.000 4340.486 Lloyds Register
Old Red Sandstone 4390.000 4362.446 Lloyds Register
Old Red Palaeozoic 4390.000 4362.446 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
30/25a- 4 9 13 1 26 23 4 2 1 3 View

Hydrocarbon Occurrence (8)

Wellbore Category Code Formation / Litho Top MD (m) Base MD (m) Notes
30/25a- 4 Oil shows OS Ekofisk Formation 3203.4480000000003 -- 86 m thick
30/25a- 4 Oil shows OS Tor Formation 3289.4016 -- 395 m thick
30/25a- 4 Oil shows OS Hod Formation [Norwegian Classification - reserved for possible future use] 3782.568 -- 124 m thick
30/25a- 4 Oil shows OS Hidra Formation 3913.0224000000003 -- 108 m thick
30/25a- 4 DST DST 3 -- 4329.7 4358.6 Label / Zechstein
30/25a- 4 DST DST 2 -- 4367.8 4388.2 Label / Rotliegend
30/25a- 4 Oil shows OS Old Red Sandstone Supergroup 4390.0344000000005 -- 123 m thick
30/25a- 4 DST DST 1 -- 4401.6 4515.6 Label / Devonian

Rock Samples (3)

Wellbore Sample Top MD (m) Base MD (m) Key Lab Results Comments Notes
30/25a- 4 Cuttings 1524.0 4511.04 -- -- .
30/25a- 4 Core #1 4238.24 4251.66 -- -- .
30/25a- 4 Core #2 4366.87 4385.46 -- -- .

Wireline Log Inventory (Ingested Curves)

Wellbore Depth Start (m) Depth Stop (m) Typed Curves Auto-scaled Ingested
30/25a- 4 89.61119842529297 4513.783203125 8 0 2026-08-06 14:03:00.329481+00 View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser
30/25a- 4
Curve Type Best Mnemonic Source Depth Start (m) Depth Stop (m) Samples
bulk_density RHOB CGG Digital Well Logs 4127.6016 4513.7832 2479
caliper CALI CGG Digital Well Logs 2284.476 4513.6308 14563
comp_sonic DT CGG Digital Well Logs 2285.0856000000003 4500.6768 14492
deep_resistivity ILD CGG Digital Well Logs 2285.8476 4511.802000000001 14580
density_correction DRHO CGG Digital Well Logs 4127.6016 4513.7832 2479
gamma_ray SGR CGG Digital Well Logs 4107.18 4503.2676 2600
gamma_ray CGR CGG Digital Well Logs 4107.18 4503.2676 2600
gamma_ray GR CGG Digital Well Logs 89.61120000000001 4503.2676 28962
med_resistivity ILM CGG Digital Well Logs 2285.8476 4512.8688 14586
neutron_por NPHI CGG Digital Well Logs 4127.754 4507.3824 2400
thorium THOR CGG Digital Well Logs 4107.18 4503.2676 2600
uranium URAN CGG Digital Well Logs 4107.18 4503.2676 2600

Survey Inventory (Deviation)

Open full Survey detail
Wellbore Stations Max MD (m) Max TVDSS (m) Survey File
30/25a- 4 137 4515.612 4487.692 D:\BigSpatial\nsta_raw\CGG_Deviation\30-25a-4 7441s_CGG-Deviation.xlsx

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