Well Data Manager / Well Summary / 20/04a- 8

20/04a- 8

Decommissioned

Well Header

Well No
20/04a- 8
NSTA DEN No
12601
Well Name
--
Drill Seq No
8
Quadrant / Block
20 / 4 a
Surface Location
57.877824, -0.384233
Source Datum
ED50
Subsea Well
Unknown
Platform
--
Slot No
--
Operator
CNOOC PETROLEUM EUROPE LIMITED
Original Operator
--
Sub Area Operator
CNOOC PETROLEUM EUROPE LIMITED
Licence No
P1100
Licence Type
Production
Spud Date
2005-05-31
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (2)

20/04a- 8 Original
Abandoned Phase 3 Interpreted Data Survey
Current Intent
Exploration
Original Intent
Exploration
Flow Class
Oil Well
Dev Type
--
Convention
--
Primary Target
H
Well Seq
WB1
Datum Type
Rotary Table
Datum Elev (m)
24.384
Ground Elev (m)
--
Water Depth (m)
114.30
TD MD (m)
3352.800
TD TVDSS (m)
3326.587
TD Datum Depth (m)
24.384
TD Datum Type
Rotary Table
Spud Date
2005-05-31
TD Reached
2005-06-22
Completion Date
2005-07-04
Release Date
2008-07-04
20/04a- 8Z Sidetrack Z parent: 20/04a- 8
Abandoned Phase 3 Interpreted Data Survey
Current Intent
Exploration
Original Intent
Exploration
Flow Class
Dry Hole
Dev Type
--
Convention
--
Primary Target
Z
Well Seq
WB2
Datum Type
Rotary Table
Datum Elev (m)
24.384
Ground Elev (m)
--
Water Depth (m)
114.30
TD MD (m)
3575.304
TD TVDSS (m)
3373.231
TD Datum Depth (m)
24.384
TD Datum Type
Rotary Table
Spud Date
2005-07-04
TD Reached
2005-07-23
Completion Date
2005-08-04
Release Date
2008-08-04

Formation Tops (55)

Wellbore Formation Era MD (m) TVDSS (m) Provider
20/04a- 8 Unknown 139.000 114.616 BGS LithoStrat Upper
Unknown 210.000 185.616 BGS LithoStrat Upper
Balder Tuff Member 744.000 719.616 BGS LithoStrat Upper
Beauly Cenozoic 752.000 727.616 BGS LithoStrat Upper
Dornoch Mesozoic 831.000 806.616 BGS LithoStrat Upper
Sele Mesozoic 949.000 924.616 BGS LithoStrat Upper
Forties Sand Mesozoic 1147.000 1122.616 BGS LithoStrat Upper
Lista Mesozoic 1166.000 1141.616 BGS LithoStrat Upper
Balmoral Sandstone Unit Cenozoic 1269.000 1244.616 BGS LithoStrat Upper
Lista Mesozoic 1363.000 1338.616 BGS LithoStrat Upper
Glamis Member Pre-Cambrian 1436.000 1411.616 BGS LithoStrat Upper
Andrew Member Palaeozoic 1528.000 1503.616 BGS LithoStrat Upper
Maureen Mesozoic 1799.000 1774.616 BGS LithoStrat Upper
Ekofisk Mesozoic 1864.000 1839.616 BGS LithoStrat Upper
Tor Mesozoic 1900.000 1875.616 BGS LithoStrat Upper
Hod Mesozoic 1930.000 1905.616 BGS LithoStrat Upper
Herring Mesozoic 2363.000 2338.616 BGS LithoStrat Upper
Plenus Marl 2391.000 2366.616 BGS LithoStrat Upper
Hidra Mesozoic 2397.000 2372.616 BGS LithoStrat Upper
Rodby Mesozoic 2470.000 2445.616 BGS LithoStrat Upper
Sola Formation 2547.000 2522.616 BGS LithoStrat Upper
Valhall Mesozoic 2632.000 2607.616 BGS LithoStrat Upper
Upper Hot Shale Member 2793.000 2768.616 BGS LithoStrat Upper
Middle Siltstone Member 2859.000 2834.616 BGS LithoStrat Upper
Lower Hot Shale Member 2966.000 2941.616 BGS LithoStrat Upper
Buzzard Sandstone Member 3034.000 3009.616 BGS LithoStrat Upper
Lower Hot Shale Member 3130.000 3105.616 BGS LithoStrat Upper
Heather Mesozoic 3155.000 3130.616 BGS LithoStrat Upper
Sgiath Formation 3273.000 3248.616 BGS LithoStrat Upper
Smith Bank Mesozoic 3297.000 3272.616 BGS LithoStrat Upper
20/04a- 8Z Unknown 138.000 113.616 BGS LithoStrat Upper
Unknown 1082.000 1057.616 BGS LithoStrat Upper
Unknown 1099.000 1074.616 BGS LithoStrat Upper
Forties Sand Mesozoic 1144.000 1119.616 BGS LithoStrat Upper
Lista Mesozoic 1163.000 1138.616 BGS LithoStrat Upper
Balmoral Member 1265.000 1240.616 BGS LithoStrat Upper
Lista Mesozoic 1370.000 1345.616 BGS LithoStrat Upper
Glamis Member Pre-Cambrian 1447.000 1422.616 BGS LithoStrat Upper
Andrew Member Palaeozoic 1546.000 1521.616 BGS LithoStrat Upper
Maureen Mesozoic 1862.000 1837.616 BGS LithoStrat Upper
Ekofisk Mesozoic 1923.000 1898.616 BGS LithoStrat Upper
Tor Mesozoic 1967.000 1942.616 BGS LithoStrat Upper
Hod Mesozoic 2003.000 1978.616 BGS LithoStrat Upper
Herring Mesozoic 2485.000 2460.616 BGS LithoStrat Upper
Plenus Marl 2516.000 2491.616 BGS LithoStrat Upper
Hidra Mesozoic 2523.000 2498.616 BGS LithoStrat Upper
Rodby Mesozoic 2616.000 2591.616 BGS LithoStrat Upper
Sola Formation 2713.000 2688.616 BGS LithoStrat Upper
Valhall Mesozoic 2807.000 2782.616 BGS LithoStrat Upper
Kimmeridge Clay 3034.000 3009.616 BGS LithoStrat Upper
Middle Siltstone Member 3132.000 3107.616 BGS LithoStrat Upper
Lower Hot Shale Member 3258.000 3233.616 BGS LithoStrat Upper
Buzzard Sandstone Member 3350.000 3325.616 BGS LithoStrat Upper
Kimmeridge Clay 3467.000 3442.616 BGS LithoStrat Upper
Heather Mesozoic 3526.000 3501.616 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
20/04a- 8 0 0 0 30 30 1 0 1 0 View
20/04a- 8Z 0 0 0 25 25 0 0 1 0 View

Hydrocarbon Occurrence (1)

Wellbore Category Code Formation / Litho Top MD (m) Base MD (m) Notes
20/04a- 8 Oil shows OS Pibroch Sandstone Member 3272.9424000000004 -- 24 m thick

Rock Samples (2)

Wellbore Sample Top MD (m) Base MD (m) Key Lab Results Comments Notes
20/04a- 8 Cuttings 1097.28 3352.8 -- -- --
20/04a- 8Z Cuttings 1103.38 3575.3 -- -- many packets empty

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
20/04a- 8 0 -- -- --
20/04a- 8Z 0 -- -- --

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