Well Data Manager / Well Summary / 15/21a-A4

15/21a-A4

Present

Well Header

Well No
15/21a-A4
NSTA DEN No
4916
Well Name
--
Drill Seq No
4
Quadrant / Block
15 / 21 a
Surface Location
58.283790, 0.170465
Source Datum
ED50
Subsea Well
Yes
Platform
A
Slot No
AF
Operator
CNOOC PETROLEUM EUROPE LIMITED
Original Operator
--
Sub Area Operator
CNOOC PETROLEUM EUROPE LIMITED
Licence No
P218
Licence Type
Production
Spud Date
1991-05-21
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (1)

15/21a-A4 Original
Completed (Shut In) View Log Interpreted Data Survey
Current Intent
Development
Original Intent
Development
Flow Class
Oil Well
Dev Type
Producer
Convention
--
Primary Target
I
Well Seq
WB1
Datum Type
Kelly Bushing
Datum Elev (m)
26.213
Ground Elev (m)
--
Water Depth (m)
42.74
TD MD (m)
4270.250
TD TVDSS (m)
3863.035
TD Datum Depth (m)
26.213
TD Datum Type
Kelly Bushing
Spud Date
1991-05-21
TD Reached
1992-12-22
Completion Date
1993-01-06
Release Date
1997-01-06

Formation Tops (9)

Wellbore Formation Era MD (m) TVDSS (m) Provider
15/21a-A4 Unknown 166.000 139.787 BGS LithoStrat Upper
Montrose Mesozoic 2494.000 2286.260 BGS LithoStrat Upper
Chalk Mesozoic 2614.000 2392.754 BGS LithoStrat Upper
Chalk Mesozoic 2653.000 2427.519 BGS LithoStrat Upper
Cromer Knoll Mesozoic 3348.000 3058.718 BGS LithoStrat Upper
Humber Mesozoic 3514.000 3211.313 BGS LithoStrat Upper
Piper Mesozoic 3937.000 3586.397 BGS LithoStrat Upper
Sgiath Formation 4043.000 3675.081 BGS LithoStrat Upper
Rattray 4206.000 3810.157 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
15/21a-A4 0 0 0 0 9 0 2 1 0 View

Hydrocarbon Occurrence (0)

No hydrocarbon shows or DSTs recorded for this well.

Rock Samples (3)

Wellbore Sample Top MD (m) Base MD (m) Key Lab Results Comments Notes
15/21a-A4 Cuttings 512.06 4270.25 -- -- wet samples .
15/21a-A4 Core #1 4019.4 4046.89 -- -- --
15/21a-A4 Core #2 4048.05 4073.65 -- -- --

Wireline Log Inventory (Ingested Curves)

Wellbore Depth Start (m) Depth Stop (m) Typed Curves Auto-scaled Ingested
15/21a-A4 1547.7744140625 4270.248046875 9 0 2026-08-06 08:25:00.702942+00 View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser
15/21a-A4
Curve Type Best Mnemonic Source Depth Start (m) Depth Stop (m) Samples
bulk_density DEN OGA Batch Unzipped 1547.7744 4258.2084 17781
caliper CALI OGA Batch Unzipped 1547.7744 4257.751200000001 17778
comp_sonic DT OGA Batch Unzipped 1547.7744 4265.9808 17832
deep_resistivity RES_DEP OGA Batch Unzipped 3474.4152000000004 4270.2480000000005 5223
density_correction DENC OGA Batch Unzipped 1547.7744 4258.2084 17781
gamma_ray GR OGA Batch Unzipped 1547.7744 4270.2480000000005 17846
med_resistivity RES_MED OGA Batch Unzipped 3450.3360000000002 4270.2480000000005 5381
neutron_por NEU OGA Batch Unzipped 1547.7744 4252.874400000001 17746
sp SP OGA Batch Unzipped 3450.3360000000002 4270.2480000000005 5381

Survey Inventory (Deviation)

Open full Survey detail
Wellbore Stations Max MD (m) Max TVDSS (m) Survey File
15/21a-A4 586 4270.248 3863.158 G:\NSTA_BigFiles\OGA_Batch_Unzipped\UK_15\15_21a-A4\WELL_PATH\WDD_QC\15_21a-A4_wdd_WDD_FILE_1678379_DATACO_MAPPED.csv

Related Documents

Open Document Search
Searching related documents...