Well Data Manager / Well Summary / 21/05a- 2

21/05a- 2

Decommissioned

Well Header

Well No
21/05a- 2
NSTA DEN No
3689
Well Name
--
Drill Seq No
2
Quadrant / Block
21 / 5 a
Surface Location
57.998180, 0.930559
Source Datum
ED50
Subsea Well
No
Platform
--
Slot No
--
Operator
CHRYSAOR PRODUCTION (U.K.) LIMITED
Original Operator
--
Sub Area Operator
CHRYSAOR PRODUCTION (U.K.) LIMITED
Licence No
P103
Licence Type
Production
Spud Date
1989-01-31
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (1)

21/05a- 2 Original
Abandoned Phase 3 View Log Interpreted Data Survey
Current Intent
Exploration
Original Intent
Exploration
Flow Class
Oil Show
Dev Type
--
Convention
--
Primary Target
C
Well Seq
WB1
Datum Type
Kelly Bushing
Datum Elev (m)
24.384
Ground Elev (m)
--
Water Depth (m)
140.82
TD MD (m)
2393.290
TD TVDSS (m)
2368.030
TD Datum Depth (m)
24.384
TD Datum Type
Kelly Bushing
Spud Date
1989-01-31
TD Reached
1989-02-17
Completion Date
1989-02-28
Release Date
1993-02-28

Formation Tops (11)

Wellbore Formation Era MD (m) TVDSS (m) Provider
21/05a- 2 Horda Cenozoic 1718.000 1692.879 Lloyds Register
Stronsay Cenozoic 1718.000 1692.879 Lloyds Register
Grid Sandstone Cenozoic 1781.000 1755.878 Lloyds Register
Caran Sanstone 1864.000 1838.876 Lloyds Register
Balder Cenozoic 2235.000 2209.801 Lloyds Register
Balder Tuff Cenozoic 2235.000 2209.801 Lloyds Register
Moray Mesozoic 2235.000 2209.801 Lloyds Register
Sele Mesozoic 2276.000 2250.788 Lloyds Register
Forties Sandstone Mesozoic 2315.000 2289.778 Lloyds Register
Montrose Mesozoic 2378.000 2352.761 Lloyds Register
Lista Mesozoic 2378.000 2352.761 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
21/05a- 2 3 4 4 15 11 1 1 1 0 View

Hydrocarbon Occurrence (0)

No hydrocarbon shows or DSTs recorded for this well.

Rock Samples (2)

Wellbore Sample Top MD (m) Base MD (m) Key Lab Results Comments Notes
21/05a- 2 Cuttings 780.29 2393.29 -- -- .
21/05a- 2 Core #1 1867.81 1886.41 -- -- preserved samples taken .

Wireline Log Inventory (Ingested Curves)

Wellbore Depth Start (m) Depth Stop (m) Typed Curves Auto-scaled Ingested
21/05a- 2 151.0283966064453 2392.679931640625 9 0 2026-08-06 10:10:30.421212+00 View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser
21/05a- 2
Curve Type Best Mnemonic Source Depth Start (m) Depth Stop (m) Samples
bulk_density RHOB CGG Digital Well Logs 765.048 2392.5276000000003 10680
caliper CALI CGG Digital Well Logs 765.2004000000001 2392.5276000000003 10679
comp_sonic DT CGG Digital Well Logs 765.5052000000001 2379.5736 10592
deep_resistivity ILD CGG Digital Well Logs 766.1148000000001 2390.2416000000003 10658
density_correction DRHO CGG Digital Well Logs 765.8100000000001 2392.6800000000003 10676
gamma_ray SGR CGG Digital Well Logs 753.7704 2383.3836 10694
gamma_ray CGR CGG Digital Well Logs 753.618 2383.3836 10695
gamma_ray GR CGG Digital Well Logs 151.0284 2383.2312 14648
med_resistivity ILM CGG Digital Well Logs 766.2672 2391.6132000000002 10666
neutron_por NPHI CGG Digital Well Logs 765.2004000000001 2387.0412 10643
pef PEF CGG Digital Well Logs 765.8100000000001 2392.5276000000003 10675
potassium POTA CGG Digital Well Logs 753.618 2383.536 10696
thorium THOR CGG Digital Well Logs 753.618 2383.536 10696
uranium URAN CGG Digital Well Logs 753.618 2383.536 10696

Survey Inventory (Deviation)

Open full Survey detail
Wellbore Stations Max MD (m) Max TVDSS (m) Survey File
21/05a- 2 30 2393.290 2368.047 D:\BigSpatial\nsta_raw\CGG_Deviation\21-5a-2 7932cr-CGG_Deviation.xlsx

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