Well Data Manager / Well Summary / 21/27a- 5

21/27a- 5

Decommissioned

Well Header

Well No
21/27a- 5
NSTA DEN No
6472
Well Name
--
Drill Seq No
5
Quadrant / Block
21 / 27 a
Surface Location
57.072935, 0.269209
Source Datum
ED50
Subsea Well
Unknown
Platform
--
Slot No
--
Operator
SPIRIT ENERGY NORTH SEA OIL LIMITED
Original Operator
--
Sub Area Operator
SPIRIT ENERGY NORTH SEA OIL LIMITED
Licence No
P595
Licence Type
Production
Spud Date
1998-09-16
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (4)

21/27a- 5 Original
Abandoned Phase 3 View Log Interpreted Data Survey
Current Intent
Appraisal
Original Intent
Appraisal
Flow Class
Oil Well
Dev Type
--
Convention
--
Primary Target
E
Well Seq
WB1
Datum Type
Kelly Bushing
Datum Elev (m)
25.908
Ground Elev (m)
--
Water Depth (m)
81.08
TD MD (m)
1088.440
TD TVDSS (m)
1062.532
TD Datum Depth (m)
25.908
TD Datum Type
Kelly Bushing
Spud Date
1998-09-16
TD Reached
1998-09-27
Completion Date
1998-10-02
Release Date
2002-10-02
21/27a- 5X Sidetrack X parent: 21/27a- 5Y
Abandoned Phase 3 Interpreted Data Survey
Current Intent
Appraisal
Original Intent
Appraisal
Flow Class
Gas and Oil Well
Dev Type
--
Convention
--
Primary Target
E
Well Seq
WB4
Datum Type
Kelly Bushing
Datum Elev (m)
25.908
Ground Elev (m)
--
Water Depth (m)
81.08
TD MD (m)
2057.400
TD TVDSS (m)
2031.492
TD Datum Depth (m)
25.908
TD Datum Type
Kelly Bushing
Spud Date
1998-10-12
TD Reached
1998-10-14
Completion Date
1998-11-18
Release Date
2002-11-18
21/27a- 5Y Sidetrack Y parent: 21/27a- 5Z
Abandoned Phase 3 Interpreted Data Survey
Current Intent
Appraisal
Original Intent
Appraisal
Flow Class
Oil Well
Dev Type
--
Convention
--
Primary Target
E
Well Seq
WB3
Datum Type
Kelly Bushing
Datum Elev (m)
25.908
Ground Elev (m)
--
Water Depth (m)
81.08
TD MD (m)
1318.870
TD TVDSS (m)
1292.962
TD Datum Depth (m)
25.908
TD Datum Type
Kelly Bushing
Spud Date
1998-10-11
TD Reached
1998-10-11
Completion Date
1998-10-12
Release Date
2002-10-12
21/27a- 5Z Sidetrack Z parent: 21/27a- 5
Abandoned Phase 3 View Log Interpreted Data Survey
Current Intent
Appraisal
Original Intent
Appraisal
Flow Class
Oil Well
Dev Type
--
Convention
--
Primary Target
E
Well Seq
WB2
Datum Type
Kelly Bushing
Datum Elev (m)
25.908
Ground Elev (m)
--
Water Depth (m)
81.08
TD MD (m)
1350.569
TD TVDSS (m)
1324.661
TD Datum Depth (m)
25.908
TD Datum Type
Kelly Bushing
Spud Date
1998-10-02
TD Reached
1998-10-11
Completion Date
1998-10-12
Release Date
2002-10-12

Formation Tops (19)

Wellbore Formation Era MD (m) TVDSS (m) Provider
21/27a- 5 Unknown 108.000 82.091 BGS LithoStrat Upper
Nordland Cenozoic 454.000 428.072 BGS LithoStrat Upper
Lark Formation Cenozoic 620.000 594.065 BGS LithoStrat Upper
Horda Formation Cenozoic 832.000 806.059 BGS LithoStrat Upper
Tay Sandstone Member (Lower) Cenozoic 843.000 817.059 BGS LithoStrat Upper
Tay Sandstone Member (Lower) Cenozoic 865.000 839.058 BGS LithoStrat Upper
Horda Formation Cenozoic 976.000 950.051 BGS LithoStrat Upper
Balder Cenozoic 985.000 959.050 BGS LithoStrat Upper
Sele Mesozoic 1003.000 977.049 BGS LithoStrat Upper
21/27a- 5X Tay Sandstone Member (Lower) Cenozoic 1219.000 811.236 BGS LithoStrat Upper
Tay Sandstone Member (Lower) Cenozoic 1238.000 813.141 BGS LithoStrat Upper
21/27a- 5Y Tay Sandstone Member (Lower) Cenozoic 1213.000 806.021 BGS LithoStrat Upper
Tay Sandstone Member (Lower) Cenozoic 1238.000 823.167 BGS LithoStrat Upper
21/27a- 5Z Nordland Cenozoic 427.000 401.040 BGS LithoStrat Upper
Nordland Cenozoic 450.000 424.037 BGS LithoStrat Upper
Lark Formation Cenozoic 630.000 596.883 BGS LithoStrat Upper
Horda Formation Cenozoic 892.000 768.468 BGS LithoStrat Upper
Tay Sandstone Member (Lower) Cenozoic 1227.000 811.985 BGS LithoStrat Upper
Tay Sandstone Member (Lower) Cenozoic 1324.000 840.155 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
21/27a- 5 0 0 0 9 9 1 3 1 0 View
21/27a- 5X 0 0 0 2 2 1 0 1 1 View
21/27a- 5Y 0 0 0 1 2 1 0 1 0 View
21/27a- 5Z 0 0 0 6 6 1 0 1 0 View

Hydrocarbon Occurrence (6)

Wellbore Category Code Formation / Litho Top MD (m) Base MD (m) Notes
21/27a- 5 Mixed shows OGS Tay Sandstone Member 842.772 -- 22 m thick
21/27a- 5 Oil shows OS Tay Sandstone Member 864.7176000000001 -- 111 m thick
21/27a- 5X Oil OW Tay Sandstone Member 1238.0976 -- 819 m thick
21/27a- 5X DST DST 1 -- 1417.3 2026.9 Label / Alba
21/27a- 5Z Oil shows OS Tay Sandstone Member 1226.8200000000002 -- 98 m thick
21/27a- 5Z Oil shows OS Tay Sandstone Member 1324.356 -- 26 m thick

Rock Samples (7)

Wellbore Sample Top MD (m) Base MD (m) Key Lab Results Comments Notes
21/27a- 5 Cuttings 475.49 1088.14 -- -- --
21/27a- 5 Core #1 842.77 847.95 -- -- --
21/27a- 5 Core #2 851.76 852.83 -- -- --
21/27a- 5 Core #3 861.06 868.83 -- -- --
21/27a- 5X Cuttings 1261.87 2057.4 -- -- --
21/27a- 5Y Cuttings 1271.02 1307.59 -- -- --
21/27a- 5Z Cuttings 475.49 1344.17 -- -- --

Wireline Log Inventory (Ingested Curves)

Wellbore Depth Start (m) Depth Stop (m) Typed Curves Auto-scaled Ingested
21/27a- 5 75.89520263671875 1082.649658203125 10 0 2026-08-06 17:28:46.537236+00 View Log
21/27a- 5Z 1238.09765625 1334.71923828125 2 0 2026-08-06 17:28:48.676213+00 View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser
21/27a- 5
Curve Type Best Mnemonic Source Depth Start (m) Depth Stop (m) Samples
bulk_density RHOZ CGG Digital Well Logs 449.27520000000004 1082.6496 4157
caliper C2 CGG Digital Well Logs 449.27520000000004 1082.3448 4155
caliper HCAL CGG Digital Well Logs 449.27520000000004 1082.6496 4157
caliper C1 CGG Digital Well Logs 449.27520000000004 1082.3448 4155
comp_sonic DT4P CGG Digital Well Logs 431.29200000000003 1065.276 4161
deep_resistivity HLLD CGG Digital Well Logs 449.27520000000004 1081.8876 4152
density_correction HDRA CGG Digital Well Logs 449.27520000000004 1082.6496 4157
gamma_ray GR CGG Digital Well Logs 75.8952 1076.5536 6567
neutron_por NPHI CGG Digital Well Logs 430.37760000000003 1078.3824 4253
pef PEFZ CGG Digital Well Logs 449.27520000000004 1082.6496 4157
rxo_resistivity RXOZ CGG Digital Well Logs 449.27520000000004 1082.6496 4157
shallow_resistivity HLLS CGG Digital Well Logs 449.27520000000004 1081.8876 4152
21/27a- 5Z
Curve Type Best Mnemonic Source Depth Start (m) Depth Stop (m) Samples
density_correction DRHM CGG Digital Well Logs 1238.0976 1334.7192 635
neutron_por NPLM CGG Digital Well Logs 1250.5944 1333.0428000000002 189

Survey Inventory (Deviation)

Open full Survey detail
Wellbore Stations Max MD (m) Max TVDSS (m) Survey File
21/27a- 5 78 1088.441 1062.483 D:\BigSpatial\nsta_raw\CGG_Deviation\21-27a-5 27695ar_CGG-Deviation.xlsx
21/27a- 5X 179 2057.400 823.575 D:\BigSpatial\nsta_raw\CGG_Deviation\21-27a-5X 27896x_CGG-Deviation.xlsx
21/27a- 5Y 5 1318.870 840.087 D:\BigSpatial\nsta_raw\CGG_Deviation\21-27a-5Y 27897n_CGG-Deviation.xlsx
21/27a- 5Z 93 1350.569 853.585 D:\BigSpatial\nsta_raw\CGG_Deviation\21-27a-5Z 27892r_CGG-Deviation.xlsx

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