Well Data Manager / Well Summary / 21/03- 1

21/03- 1

Decommissioned

Well Header

Well No

21/03- 1

NSTA DEN No

472

Well Name

Drill Seq No

Quadrant / Block

21 / 3

Surface Location

57.949778, 0.465663

Source Datum

ED50

Subsea Well

Platform

Slot No

Operator

Original Operator

Sub Area Operator

TOTALENERGIES E&P UK LIMITED

Licence No

P118

Licence Type

Production

Spud Date

1973-02-19

Source File

UKCS_Wells_ConvtoWGS84.shp

Imported

2026-05-22 15:28

Wellbores (1)

21/03- 1A Sidetrack A

Abandoned Phase 3 View Log Interpreted Data Survey

Current Intent

Exploration

Original Intent

Exploration

Flow Class

Oil Show

Dev Type

Convention

Primary Target

Well Seq

WB1

Datum Type

Kelly Bushing

Datum Elev (m)

27.000

Ground Elev (m)

Water Depth (m)

142.50

TD MD (m)

3173.000

TD TVDSS (m)

3146.000

TD Datum Depth (m)

27.127

TD Datum Type

Kelly Bushing

Spud Date

1973-02-19

TD Reached

1973-05-14

Completion Date

1973-05-22

Release Date

1977-05-22

Formation Tops (21)

Wellbore	Formation	Era	MD (m)	TVDSS (m)	Provider
21/03- 1A	Horda	Cenozoic	1308.000	1280.888	Lloyds Register
	Stronsay	Cenozoic	1308.000	1280.888	Lloyds Register
	Balder	Cenozoic	1785.000	1757.847	Lloyds Register
	Moray	Mesozoic	1785.000	1757.847	Lloyds Register
	Balder Tuff	Cenozoic	1808.000	1780.845	Lloyds Register
	Sele	Mesozoic	1844.000	1816.841	Lloyds Register
	Cromarty Sandstone	Cenozoic	1891.000	1863.837	Lloyds Register
	Forties Sandstone	Mesozoic	1934.000	1906.834	Lloyds Register
	Lista	Mesozoic	1991.000	1963.829	Lloyds Register
	Montrose	Mesozoic	1991.000	1963.829	Lloyds Register
	Balmoral Sandstone	Cenozoic	1991.000	1963.829	Lloyds Register
	Glamis Tuff		2188.000	2160.812	Lloyds Register
	Andrew Sandstone	Cenozoic	2219.000	2191.809	Lloyds Register
	Maureen	Mesozoic	2336.000	2308.782	Lloyds Register
	Maureen Sandstone	Mesozoic	2336.000	2308.782	Lloyds Register
	Ekofisk	Mesozoic	2484.000	2456.710	Lloyds Register
	Chalk	Mesozoic	2484.000	2456.710	Lloyds Register
	Upper Cretaceous Chalk	Mesozoic	2530.000	2502.692	Lloyds Register
	Fladen	Mesozoic	3059.000	3029.077	Lloyds Register
	Rattray Volcanics	Mesozoic	3059.000	3029.077	Lloyds Register
	Pentland	Mesozoic	3059.000	3029.077	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
21/03- 1A	5	8	8	17	21	5	1	1	2	View

Hydrocarbon Occurrence (3)

Wellbore	Category	Code	Formation / Litho	Top MD (m)	Base MD (m)	Notes
21/03- 1A	Gas shows	GS	*	1808.0888400000001	--	541 m thick
21/03- 1A	DST	DST 1	--	1944.0	1951.0	Not used for labelling, multiple DSTs in same play / Forties
21/03- 1A	DST	DST 2	--	1944.0	1951.0	Label / Forties

Rock Samples (2)

Wellbore	Sample	Top MD (m)	Base MD (m)	Key Lab Results	Comments	Notes
21/03- 1A	Cuttings	460.0	3169.95	--	--	.
21/03- 1A	Core #1	3105.97	3114.96	--	--	.

Wireline Log Inventory (Ingested Curves)

Wellbore	Depth Start (m)	Depth Stop (m)	Typed Curves	Auto-scaled	Ingested
21/03- 1A	165.12539672851562	3167.710205078125	9	0	2026-08-06 10:08:47.415656+00	View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser

21/03- 1A

Curve Type	Best Mnemonic	Source	Depth Start (m)	Depth Stop (m)	Samples
bulk_density	RHOB	CGG Digital Well Logs	1341.0438	3167.4054	11985
caliper	CAL	CGG Digital Well Logs	1340.4342	3168.6246	10445
caliper	CALI	CGG Digital Well Logs	431.5206	3167.4054	17314
caliper	MCAL	CGG Digital Well Logs	1748.7138	2050.161	1979
comp_sonic	DT	CGG Digital Well Logs	432.435	3167.4054	17931
deep_resistivity	LL7	CGG Digital Well Logs	1340.1294	2053.0566	4679
deep_resistivity	ILD	CGG Digital Well Logs	432.8922	3164.8146	17927
density_correction	DRHO	CGG Digital Well Logs	1341.3486	3167.7102	11985
gamma_ray	GR	CGG Digital Well Logs	165.1254	3161.157	19660
gamma_ray	GRD	CGG Digital Well Logs	1335.1002	2282.7234	6219
micro_resistivity	MNOR	CGG Digital Well Logs	1749.0186	2050.6182	1980
micro_resistivity	MINV	CGG Digital Well Logs	1749.0186	2050.7706	1981
micro_resistivity	MLL	CGG Digital Well Logs	1748.7138	2050.6182	1982
neutron_por	NPHI	CGG Digital Well Logs	1341.1962	3162.5286	11923
sp	SP	CGG Digital Well Logs	431.8254	3167.7102	17946

Survey Inventory (Deviation)

Open full Survey detail

Wellbore	Stations	Max MD (m)	Max TVDSS (m)	Survey File
21/03- 1A	22	3173.000	3141.832	D:\BigSpatial\nsta_raw\CGG_Deviation\21-3-1A 20327as-CGG-deviation.xlsx

21/03- 1

Well Header

Wellbores (1)

Formation Tops (21)

Lithology Intervals

Interpreted Data Inventory (LR / WellStrat)

Hydrocarbon Occurrence (3)

Rock Samples (2)

Wireline Log Inventory (Ingested Curves)

Source LAS Manifest (Best Curve per Type)

Survey Inventory (Deviation)

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