Well Data Manager / Well Summary / 21/23a- 10

21/23a- 10

Decommissioned

Well Header

Well No

21/23a- 10

NSTA DEN No

18044

Well Name

Drill Seq No

Quadrant / Block

21 / 23 a

Surface Location

57.291672, 0.546674

Source Datum

ED50

Subsea Well

Unknown

Platform

Slot No

Operator

PREMIER OIL ONS LIMITED

Original Operator

Sub Area Operator

PREMIER OIL ONS LIMITED

Licence No

P1220

Licence Type

Production

Spud Date

2007-08-10

Source File

nsta_feature_service

Imported

2026-05-22 15:28

Wellbores (2)

21/23a- 10 Original

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)

27.432

Ground Elev (m)

Water Depth (m)

81.38

TD MD (m)

2042.180

TD TVDSS (m)

1872.100

TD Datum Depth (m)

27.432

TD Datum Type

Kelly Bushing

Spud Date

2007-08-10

TD Reached

2007-08-21

Completion Date

2007-08-25

Release Date

2010-08-25

21/23a- 10Z Sidetrack Z parent: 21/23a- 10

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

WB2

Datum Type

Kelly Bushing

Datum Elev (m)

27.432

Ground Elev (m)

Water Depth (m)

81.38

TD MD (m)

2286.000

TD TVDSS (m)

1771.750

TD Datum Depth (m)

27.432

TD Datum Type

Kelly Bushing

Spud Date

2007-08-25

TD Reached

2007-08-27

Completion Date

2007-08-29

Release Date

2010-08-29

Formation Tops (13)

Wellbore	Formation	Era	MD (m)	TVDSS (m)	Provider
21/23a- 10	Unknown		109.000	81.568	BGS LithoStrat Upper
	Undifferentiated	Cenozoic	811.000	783.566	BGS LithoStrat Upper
	Lark Formation	Cenozoic	1038.000	1006.172	BGS LithoStrat Upper
	Horda Formation	Cenozoic	1753.000	1622.076	BGS LithoStrat Upper
	Tay Sands		1922.000	1766.040	BGS LithoStrat Upper
	Horda Formation	Cenozoic	2006.000	1839.827	BGS LithoStrat Upper
21/23a- 10Z	Unknown		109.000	81.568	BGS LithoStrat Upper
	Unknown		884.000	856.521	BGS LithoStrat Upper
	Undifferentiated	Cenozoic	899.000	871.483	BGS LithoStrat Upper
	Lark Formation	Cenozoic	1020.000	991.486	BGS LithoStrat Upper
	Horda Formation	Cenozoic	1887.000	1563.444	BGS LithoStrat Upper
	Tay Sands		2067.000	1649.428	BGS LithoStrat Upper
	Balder	Cenozoic	2198.000	1721.095	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
21/23a- 10	0	0	0	6	6	1	0	0	0	View
21/23a- 10Z	0	0	0	7	7	1	0	0	0	View

Hydrocarbon Occurrence (0)

No hydrocarbon shows or DSTs recorded for this well.

Rock Samples (0)

No cuttings, core, or plug samples recorded for this well.

Wireline Log Inventory (Ingested Curves)

Wellbore	Depth Start (m)	Depth Stop (m)	Typed Curves	Auto-scaled	Ingested
21/23a- 10	98.75520324707031	2042.1600341796875	10	0	2026-08-06 17:27:02.221882+00	View Log
21/23a- 10Z	820.5216064453125	2270.760009765625	4	0	2026-08-06 10:20:42.575252+00	View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser

21/23a- 10

Curve Type	Best Mnemonic	Source	Depth Start (m)	Depth Stop (m)	Samples
bulk_density	RHOZ	CGG Digital Well Logs	832.104	2022.0432	7809
caliper	HCAL	CGG Digital Well Logs	832.104	2022.3480000000002	7811
comp_sonic	DT4P	CGG Digital Well Logs	101.9556	2033.6256	12656
comp_sonic	DTCO	CGG Digital Well Logs	101.9556	2033.6256	12656
deep_resistivity	AT90	CGG Digital Well Logs	832.104	2042.16	7941
density_correction	HDRA	CGG Digital Well Logs	832.104	2022.0432	7809
gamma_ray	GR	CGG Digital Well Logs	98.7552	2016.5568	12585
med_resistivity	AT30	CGG Digital Well Logs	832.104	2042.16	7941
med_resistivity	AT20	CGG Digital Well Logs	832.104	2042.16	7941
med_resistivity	AT60	CGG Digital Well Logs	832.104	2042.16	7941
neutron_por	TNPH	CGG Digital Well Logs	832.104	2018.3856	7785
pef	PEFZ	CGG Digital Well Logs	832.104	2022.0432	7809
shallow_resistivity	AT10	CGG Digital Well Logs	832.104	2042.16	7941
shear_sonic	DTSM	CGG Digital Well Logs	101.9556	2033.6256	12676
shear_sonic	DT4S	CGG Digital Well Logs	101.9556	2030.5776	6800

21/23a- 10Z

Curve Type	Best Mnemonic	Source	Depth Start (m)	Depth Stop (m)	Samples
comp_sonic	DTCO	CGG Digital Well Logs	820.5216	2252.472	9397
deep_resistivity	A40H	CGG Digital Well Logs	825.5508000000001	2270.76	9484
deep_resistivity	P40H	CGG Digital Well Logs	825.5508000000001	2269.5408	9476
med_resistivity	P28H	CGG Digital Well Logs	825.5508000000001	2270.76	9484
neutron_por	TNPH	CGG Digital Well Logs	827.3796000000001	2269.5408	8963

Survey Inventory (Deviation)

Open full Survey detail

Wellbore	Stations	Max MD (m)	Max TVDSS (m)	Survey File
21/23a- 10	64	2042.160	1872.046	D:\BigSpatial\nsta_raw\CGG_Deviation\21-23a-10 29764t_CGG-Deviation.xlsx
21/23a- 10Z	75	2286.000	1771.725	D:\BigSpatial\nsta_raw\CGG_Deviation\21-23a-10Z 29772q_CGG-Deviation.xlsx

21/23a- 10

Well Header

Wellbores (2)

Formation Tops (13)

Lithology Intervals

Interpreted Data Inventory (LR / WellStrat)

Hydrocarbon Occurrence (0)

Rock Samples (0)

Wireline Log Inventory (Ingested Curves)

Source LAS Manifest (Best Curve per Type)

Survey Inventory (Deviation)

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