Well Data Manager / Well Summary / 15/21a- 20

15/21a- 20

Decommissioned

Well Header

Well No
15/21a- 20
NSTA DEN No
3264
Well Name
--
Drill Seq No
20
Quadrant / Block
15 / 21 a
Surface Location
58.281728, 0.179650
Source Datum
ED50
Subsea Well
No
Platform
--
Slot No
--
Operator
CNOOC PETROLEUM EUROPE LIMITED
Original Operator
--
Sub Area Operator
CNOOC PETROLEUM EUROPE LIMITED
Licence No
P218
Licence Type
Production
Spud Date
1987-10-23
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (1)

15/21a- 20 Original
Abandoned Phase 3 View Log Interpreted Data Survey
Current Intent
Appraisal
Original Intent
Appraisal
Flow Class
Oil and Gas Shows
Dev Type
--
Convention
--
Primary Target
AC
Well Seq
WB1
Datum Type
Kelly Bushing
Datum Elev (m)
27.740
Ground Elev (m)
--
Water Depth (m)
141.12
TD MD (m)
4094.988
TD TVDSS (m)
4058.740
TD Datum Depth (m)
27.432
TD Datum Type
Kelly Bushing
Spud Date
1987-10-23
TD Reached
1987-12-16
Completion Date
1988-01-23
Release Date
1992-01-23

Formation Tops (17)

Wellbore Formation Era MD (m) TVDSS (m) Provider
15/21a- 20 Horda Cenozoic 688.000 660.244 Lloyds Register
Grid Sandstone Cenozoic 688.000 660.244 Lloyds Register
Stronsay Cenozoic 688.000 660.244 Lloyds Register
Caran Sanstone 1116.000 1088.232 Lloyds Register
Balder Cenozoic 1344.000 1316.225 Lloyds Register
Moray Mesozoic 1344.000 1316.225 Lloyds Register
Dornoch Mesozoic 1481.000 1453.216 Lloyds Register
Sele Mesozoic 1498.000 1470.214 Lloyds Register
Lower Dornoch Sandstone Cenozoic 1526.000 1498.211 Lloyds Register
Montrose Mesozoic 1581.000 1553.203 Lloyds Register
Lista Mesozoic 1581.000 1553.203 Lloyds Register
Balmoral Sandstone Cenozoic 1720.000 1692.173 Lloyds Register
Andrew Sandstone Cenozoic 1980.000 1952.119 Lloyds Register
Maureen Sandstone Mesozoic 2329.000 2301.069 Lloyds Register
Maureen Mesozoic 2329.000 2301.069 Lloyds Register
Chalk Mesozoic 2433.000 2405.048 Lloyds Register
Ekofisk Mesozoic 2433.000 2405.048 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
15/21a- 20 4 7 6 22 17 2 10 1 3 View

Hydrocarbon Occurrence (5)

Wellbore Category Code Formation / Litho Top MD (m) Base MD (m) Notes
15/21a- 20 Mixed shows OGS Pibroch Sandstone Member 3752.6976 -- 164 m thick
15/21a- 20 DST DST 3 -- 3764.9 3774.3 Label / Upper Jurassic
15/21a- 20 DST DST 2 -- 3822.2 3834.1 Not used for labelling, multiple DSTs in same play / Upper Jurassic
15/21a- 20 DST DST 1 -- 3890.5 3914.9 Not used for labelling, multiple DSTs in same play / Upper Jurassic
15/21a- 20 Mixed shows OGS PISH 3916.6800000000003 -- 151 m thick

Rock Samples (11)

Wellbore Sample Top MD (m) Base MD (m) Key Lab Results Comments Notes
15/21a- 20 Cuttings 579.12 4093.46 -- -- .
15/21a- 20 Core #1 3755.75 3781.35 -- -- .
15/21a- 20 Core #2 3781.35 3791.25 -- -- .
15/21a- 20 Core #3 3792.02 3818.69 -- -- .
15/21a- 20 Core #4 3818.53 3821.89 -- -- .
15/21a- 20 Core #5 3822.8 3850.54 -- -- .
15/21a- 20 Core #6 3850.23 3857.91 -- -- .
15/21a- 20 Core #7 3857.55 3865.78 -- -- .
15/21a- 20 Core #8 3866.39 3893.76 -- -- .
15/21a- 20 Core #9 3894.12 3906.62 -- -- .
15/21a- 20 Core #10 3906.62 3929.45 -- -- .

Wireline Log Inventory (Ingested Curves)

Wellbore Depth Start (m) Depth Stop (m) Typed Curves Auto-scaled Ingested
15/21a- 20 168.8592071533203 4094.988037109375 10 0 2026-08-06 08:23:38.389283+00 View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser
15/21a- 20
Curve Type Best Mnemonic Source Depth Start (m) Depth Stop (m) Samples
bulk_density DEN OGA Batch Unzipped 1491.3864 4091.0256000000004 17054
caliper CALI OGA Batch Unzipped 168.85920000000002 4087.5204000000003 25444
comp_sonic DT OGA Batch Unzipped 1542.8976 4079.2908 16639
deep_resistivity RES_DEP OGA Batch Unzipped 168.85920000000002 4091.7876 25720
density_correction DENC OGA Batch Unzipped 1491.3864 4090.8732 17053
gamma_ray GR OGA Batch Unzipped 168.85920000000002 4094.9880000000003 25657
med_resistivity RES_MED OGA Batch Unzipped 168.85920000000002 4094.9880000000003 25753
micro_resistivity RES_MIC OGA Batch Unzipped 3137.4588000000003 4094.9880000000003 6284
shallow_resistivity RES_SLW OGA Batch Unzipped 168.85920000000002 4094.9880000000003 25614
sp SP OGA Batch Unzipped 168.85920000000002 4094.9880000000003 25752

Survey Inventory (Deviation)

Open full Survey detail
Wellbore Stations Max MD (m) Max TVDSS (m) Survey File
15/21a- 20 469 4094.988 4058.753 G:\NSTA_BigFiles\OGA_Batch_Unzipped\UK_15\15_21a- 20\WELL_PATH\WDD_QC\15_21a-_20_wdd_WDD_FILE_1678389_DATACO_MAPPED.csv

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