Well Data Manager / Well Summary / 3/23a- 4

3/23a- 4

Decommissioned

Well Header

Well No

3/23a- 4

NSTA DEN No

4125

Well Name

Drill Seq No

Quadrant / Block

3 / 23 a

Surface Location

60.315296, 1.488052

Source Datum

ED50

Subsea Well

Unknown

Platform

Slot No

Operator

ITHACA OIL AND GAS LIMITED

Original Operator

CHEVRON U.K. LIMITED

Sub Area Operator

ITHACA OIL AND GAS LIMITED

Licence No

P190

Licence Type

Production

Spud Date

1990-07-23

Source File

nsta_feature_service

Imported

2026-05-22 15:28

Wellbores (3)

3/23a- 4 Original

Abandoned Phase 3 Interpreted Data Survey

Current Intent

Exploration

Original Intent

Exploration

Flow Class

Oil Well

Dev Type

Producer

Convention

Primary Target

Well Seq

WB1

Datum Type

Kelly Bushing

Datum Elev (m)

24.994

Ground Elev (m)

Water Depth (m)

123.44

TD MD (m)

0.000

TD TVDSS (m)

0.000

TD Datum Depth (m)

24.994

TD Datum Type

Kelly Bushing

Spud Date

1990-07-23

TD Reached

1990-07-24

Completion Date

1990-07-27

Release Date

1994-07-27

3/23a- 4A Sidetrack A parent: 3/23a- 4

Abandoned Phase 3 Survey

Current Intent

Exploration

Original Intent

Exploration

Flow Class

Oil Well

Dev Type

Producer

Convention

Primary Target

Well Seq

WB1

Datum Type

Kelly Bushing

Datum Elev (m)

24.994

Ground Elev (m)

Water Depth (m)

123.44

TD MD (m)

0.000

TD TVDSS (m)

0.000

TD Datum Depth (m)

24.994

TD Datum Type

Kelly Bushing

Spud Date

1990-07-25

TD Reached

1990-07-26

Completion Date

1990-07-28

Release Date

1994-07-28

3/23a- 4B Sidetrack B parent: 3/23a- 4

Abandoned Phase 3 View Log Interpreted Data Survey

Current Intent

Exploration

Original Intent

Exploration

Flow Class

Dry Hole

Dev Type

Convention

Primary Target

Well Seq

WB1

Datum Type

Kelly Bushing

Datum Elev (m)

24.994

Ground Elev (m)

Water Depth (m)

123.44

TD MD (m)

2316.480

TD TVDSS (m)

0.000

TD Datum Depth (m)

24.994

TD Datum Type

Kelly Bushing

Spud Date

1990-07-27

TD Reached

1990-08-22

Completion Date

1990-08-22

Release Date

1994-08-22

Formation Tops (5)

Wellbore	Formation	Era	MD (m)	TVDSS (m)	Provider
3/23a- 4	Shetland	Mesozoic	2216.000	2191.006	Ternan
3/23a- 4B	Upper Mousa	Cenozoic	926.000	900.983	Ternan
	Frigg Sst		1589.000	1563.893	Ternan
	Odin Sst	Cenozoic	1651.000	1625.871	Ternan
	Odin Sst	Cenozoic	1651.000	1625.871	Ternan

Lithology Intervals

No lithology intervals ingested for this well.

Interpreted Data Inventory (LR / WellStrat)

Open Interpreted Data Log

Wellbore	Strat Intervals	Tops	Cuttings
3/23a- 4	0	1	0	View
3/23a- 4A	0	0	0
3/23a- 4B	10	4	1	View

Hydrocarbon Occurrence (0)

No hydrocarbon shows or DSTs recorded for this well.

Rock Samples (1)

Wellbore	Sample	Top MD (m)	Base MD (m)	Key Lab Results	Comments	Notes
3/23a- 4B	Cuttings	813.82	2341.47	--	--	.

Wireline Log Inventory (Ingested Curves)

Wellbore	Depth Start (m)	Depth Stop (m)	Typed Curves	Auto-scaled	Ingested
3/23a- 4B	115.8239974975586	2343.607177734375	9	0	2026-08-06 18:24:51.252684+00	View Log

Source LAS Manifest (Best Curve per Type)

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3/23a- 4B

Curve Type	Best Mnemonic	Source	Depth Start (m)	Depth Stop (m)	Samples
bulk_density	DEN	OGA Batch Unzipped	795.528	2338.7304	10123
bulk_density	RHOB	CGG Digital Well Logs	794.7660000000001	2339.4924	10137
bulk_density	CDEN	Energective CorrectedLOGS	811.0728	2343.6072	10057
cable_tension	TENS	OGA Batch Unzipped	785.6220000000001	2335.0728	10164
caliper	C13	CGG Digital Well Logs	794.4612000000001	2312.2128000000002	9960
caliper	CLD	Energective CorrectedLOGS	796.7472	2341.7784	10139
caliper	C24	CGG Digital Well Logs	794.4612000000001	2312.3652	9961
caliper	CALI	CGG Digital Well Logs	794.4612000000001	2339.34	10138
comp_sonic	DT	CGG Digital Well Logs	794.9184	2321.9664000000002	10021
comp_sonic	DTC	Energective CorrectedLOGS	810.4632	2329.434	9968
deep_resistivity	ILD	Energective CorrectedLOGS	796.7472	2335.2252000000003	10096
deep_resistivity	RES_DEP	OGA Batch Unzipped	795.528	2335.0728	10099
density_correction	DRHO	CGG Digital Well Logs	795.2232	2339.4924	10134
density_correction	CDRH	Energective CorrectedLOGS	810.9204000000001	2343.6072	10058
density_correction	DENC	OGA Batch Unzipped	795.528	2338.7304	10123
gamma_ray	GRI	Energective CorrectedLOGS	115.82400000000001	2332.9392000000003	14549
gamma_ray	GR	CGG Digital Well Logs	335.58480000000003	2335.2252000000003	13122
gamma_ray	GRLW	Energective CorrectedLOGS	810.768	1911.8580000000002	7226
med_resistivity	RES_MED	OGA Batch Unzipped	795.528	2335.0728	10099
med_resistivity	ILM	Energective CorrectedLOGS	796.7472	2335.2252000000003	10096
neutron_por	NEU	OGA Batch Unzipped	795.528	2338.7304	10123
neutron_por	NPHI	CGG Digital Well Logs	794.4612000000001	2338.1208	10130
neutron_por	CNEU	Energective CorrectedLOGS	811.6824	2343.6072	10053
pef	PEF	CGG Digital Well Logs	794.7660000000001	2339.4924	10137
pef	CPEF	Energective CorrectedLOGS	811.0728	2343.6072	10057
potassium	POTA	OGA Batch Unzipped	784.7076000000001	2332.9392000000003	10156
thorium	THOR	OGA Batch Unzipped	784.7076000000001	2332.9392000000003	10156
tvdss	SS	Energective CorrectedLOGS	115.82400000000001	2343.9120000000003	14621
uranium	URAN	OGA Batch Unzipped	784.7076000000001	2332.9392000000003	10156

Survey Inventory (Deviation)

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Wellbore	Stations	Max MD (m)	Max TVDSS (m)	Survey File
3/23a- 4	0	--	--	--
3/23a- 4A	0	--	--	--
3/23a- 4B	74	2341.474	2315.713	G:\NSTA_BigFiles\OGA_Batch_Unzipped\UK_3\3_23a- 4B\WELL_PATH\WDD_QC\3_23a-_4B_wdd_WDD_FILE_1918224_DATACO_MAPPED.csv

3/23a- 4

Well Header

Wellbores (3)

Formation Tops (5)

Lithology Intervals

Interpreted Data Inventory (LR / WellStrat)

Hydrocarbon Occurrence (0)

Rock Samples (1)

Wireline Log Inventory (Ingested Curves)

Source LAS Manifest (Best Curve per Type)

Survey Inventory (Deviation)

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