Well Data Manager / Well Summary / 21/08- 4

21/08- 4

Decommissioned

Well Header

Well No
21/08- 4
NSTA DEN No
19489
Well Name
--
Drill Seq No
4
Quadrant / Block
21 / 8
Surface Location
57.764429, 0.428203
Source Datum
ED50
Subsea Well
Unknown
Platform
--
Slot No
--
Operator
ENQUEST HEATHER LIMITED
Original Operator
--
Sub Area Operator
ENQUEST HEATHER LIMITED
Licence No
P1107
Licence Type
Production
Spud Date
2008-06-20
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (2)

21/08- 4 Original
Abandoned Phase 3 View Log Interpreted Data Survey
Current Intent
Exploration
Original Intent
Exploration
Flow Class
Gas and Oil Well
Dev Type
--
Convention
--
Primary Target
D
Well Seq
WB1
Datum Type
Rotary Table
Datum Elev (m)
23.165
Ground Elev (m)
--
Water Depth (m)
113.39
TD MD (m)
2492.350
TD TVDSS (m)
480.360
TD Datum Depth (m)
23.165
TD Datum Type
Rotary Table
Spud Date
2008-06-20
TD Reached
2008-07-05
Completion Date
2008-07-09
Release Date
2011-07-09
21/08- 4Z Sidetrack Z parent: 21/08- 4
Abandoned Phase 3 View Log Interpreted Data Survey
Current Intent
Appraisal
Original Intent
Appraisal
Flow Class
Gas and Oil Well
Dev Type
--
Convention
--
Primary Target
4Z
Well Seq
WB2
Datum Type
Rotary Table
Datum Elev (m)
23.165
Ground Elev (m)
--
Water Depth (m)
113.39
TD MD (m)
2209.800
TD TVDSS (m)
1756.562
TD Datum Depth (m)
23.165
TD Datum Type
Rotary Table
Spud Date
2008-07-09
TD Reached
2008-07-16
Completion Date
2008-07-24
Release Date
2011-07-24

Formation Tops (19)

Wellbore Formation Era MD (m) TVDSS (m) Provider
21/08- 4 Witch Ground Formation Cenozoic 137.000 113.835 BGS LithoStrat Upper
Swatchway Formation Cenozoic 143.000 119.835 BGS LithoStrat Upper
Ling Bank Formation Cenozoic 213.000 189.833 BGS LithoStrat Upper
Aberdeen Ground Formation Cenozoic 273.000 249.831 BGS LithoStrat Upper
Nordland Cenozoic 561.000 537.481 BGS LithoStrat Upper
Balder Cenozoic 2156.000 1712.983 BGS LithoStrat Upper
Sele Mesozoic 2200.000 1743.961 BGS LithoStrat Upper
Cromarty Member 2208.000 1749.605 BGS LithoStrat Upper
Sele Mesozoic 2258.000 1784.784 BGS LithoStrat Upper
Forties Member 2268.000 1791.824 BGS LithoStrat Upper
Lista Mesozoic 2378.000 1869.096 BGS LithoStrat Upper
Balmoral Member 2457.000 1924.446 BGS LithoStrat Upper
21/08- 4Z Unknown 137.000 113.835 BGS LithoStrat Upper
Aberdeen Ground Formation Cenozoic 457.000 433.835 BGS LithoStrat Upper
Nordland Cenozoic 561.000 537.835 BGS LithoStrat Upper
Balder Cenozoic 2103.000 2079.835 BGS LithoStrat Upper
Sele Mesozoic 2149.000 2125.835 BGS LithoStrat Upper
Cromarty Member 2156.000 2132.835 BGS LithoStrat Upper
Sele Mesozoic 2194.000 2170.835 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
21/08- 4 0 0 0 12 12 2 0 0 0 View
21/08- 4Z 0 0 0 7 7 1 0 0 0 View

Hydrocarbon Occurrence (1)

Wellbore Category Code Formation / Litho Top MD (m) Base MD (m) Notes
21/08- 4Z Gas shows GS Cromarty Sandstone Member 2155.8504000000003 -- 2 m thick

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
21/08- 4 762.609619140625 2478.7861328125 5 0 2026-08-06 10:11:20.198668+00 View Log
21/08- 4Z 762.609619140625 2196.236328125 5 0 2026-08-06 10:11:22.030505+00 View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser
21/08- 4
Curve Type Best Mnemonic Source Depth Start (m) Depth Stop (m) Samples
comp_sonic DTC CGG Digital Well Logs 762.6096 2460.9552000000003 11145
deep_resistivity A40H CGG Digital Well Logs 762.6096 2478.786 11262
deep_resistivity P40H CGG Digital Well Logs 762.6096 2478.786 11262
med_resistivity A34H CGG Digital Well Logs 762.6096 2478.786 11262
med_resistivity P28H CGG Digital Well Logs 762.6096 2478.786 11262
med_resistivity P34H CGG Digital Well Logs 762.6096 2478.786 11262
med_resistivity A28H CGG Digital Well Logs 762.6096 2478.786 11262
neutron_por TNPH CGG Digital Well Logs 762.6096 2477.5668 11254
shallow_resistivity P22H CGG Digital Well Logs 762.6096 2478.786 11262
shallow_resistivity P16H CGG Digital Well Logs 762.6096 2478.786 11262
shear_sonic DTS CGG Digital Well Logs 1965.96 2300.6304 2197
21/08- 4Z
Curve Type Best Mnemonic Source Depth Start (m) Depth Stop (m) Samples
comp_sonic DTCO CGG Digital Well Logs 765.048 2181.1488 9293
deep_resistivity P40H CGG Digital Well Logs 763.9812000000001 2196.2364000000002 9399
deep_resistivity A40H CGG Digital Well Logs 763.9812000000001 2196.2364000000002 9399
med_resistivity A28H CGG Digital Well Logs 763.9812000000001 2196.2364000000002 9399
med_resistivity P28H CGG Digital Well Logs 763.9812000000001 2196.2364000000002 9399
med_resistivity P34H CGG Digital Well Logs 763.9812000000001 2196.2364000000002 9399
med_resistivity A34H CGG Digital Well Logs 763.9812000000001 2196.2364000000002 9399
neutron_por TNPH CGG Digital Well Logs 762.6096 2194.8648000000003 9397
shallow_resistivity P22H CGG Digital Well Logs 763.9812000000001 2196.2364000000002 9399
shallow_resistivity P16H CGG Digital Well Logs 763.9812000000001 2196.2364000000002 9399

Survey Inventory (Deviation)

Open full Survey detail
Wellbore Stations Max MD (m) Max TVDSS (m) Survey File
21/08- 4 91 2492.350 1949.270 D:\BigSpatial\nsta_raw\CGG_Deviation\21-8-4 30002db_CGG-Deviation.xlsx
21/08- 4Z 0 -- -- --

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