Well Data Manager / Well Summary / 21/23a- 8

21/23a- 8

Decommissioned

Well Header

Well No

21/23a- 8

NSTA DEN No

14724

Well Name

Drill Seq No

Quadrant / Block

21 / 23 a

Surface Location

57.248330, 0.462829

Source Datum

ED50

Subsea Well

Unknown

Platform

Slot No

Operator

ONE-DYAS UK LIMITED

Original Operator

Sub Area Operator

ONE-DYAS UK LIMITED

Licence No

P1220

Licence Type

Production

Spud Date

2006-04-14

Source File

nsta_feature_service

Imported

2026-05-22 15:28

Wellbores (3)

21/23a- 8 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

Rotary Table

Datum Elev (m)

25.908

Ground Elev (m)

Water Depth (m)

86.56

TD MD (m)

2490.216

TD TVDSS (m)

2114.398

TD Datum Depth (m)

25.908

TD Datum Type

Rotary Table

Spud Date

2006-04-14

TD Reached

2006-04-27

Completion Date

2006-05-02

Release Date

2009-05-02

21/23a- 8Y Sidetrack Y parent: 21/23a- 8Z

Abandoned Phase 3 View Log Interpreted Data Survey

Current Intent

Appraisal

Original Intent

Appraisal

Flow Class

Gas and Oil Well

Dev Type

Convention

Primary Target

Well Seq

WB3

Datum Type

Rotary Table

Datum Elev (m)

25.908

Ground Elev (m)

Water Depth (m)

86.56

TD MD (m)

2675.534

TD TVDSS (m)

1496.263

TD Datum Depth (m)

25.908

TD Datum Type

Rotary Table

Spud Date

2006-05-08

TD Reached

2006-05-10

Completion Date

2006-05-14

Release Date

2009-05-14

21/23a- 8Z Sidetrack Z parent: 21/23a- 8

Abandoned Phase 3 Interpreted Data Survey

Current Intent

Exploration

Original Intent

Exploration

Flow Class

Oil Well

Dev Type

Convention

Primary Target

Well Seq

WB2

Datum Type

Rotary Table

Datum Elev (m)

25.908

Ground Elev (m)

Water Depth (m)

86.56

TD MD (m)

2693.518

TD TVDSS (m)

1502.054

TD Datum Depth (m)

25.908

TD Datum Type

Rotary Table

Spud Date

2006-05-02

TD Reached

2006-05-05

Completion Date

2006-05-08

Release Date

2009-05-08

Formation Tops (41)

Wellbore	Formation	Era	MD (m)	TVDSS (m)	Provider
21/23a- 8	Nordland	Cenozoic	112.000	86.092	BGS LithoStrat Upper
	Nordland	Cenozoic	869.000	843.041	BGS LithoStrat Upper
	Lark Formation	Cenozoic	990.000	963.681	BGS LithoStrat Upper
	Horda Formation	Cenozoic	1402.000	1324.638	BGS LithoStrat Upper
	Tay Formation	Cenozoic	1667.000	1516.449	BGS LithoStrat Upper
	Forties	Mesozoic	1739.000	1568.732	BGS LithoStrat Upper
	Lista	Mesozoic	1754.000	1579.781	BGS LithoStrat Upper
	Maureen	Mesozoic	1867.000	1663.200	BGS LithoStrat Upper
	Chalk	Mesozoic	1886.000	1677.451	BGS LithoStrat Upper
	Chalk	Mesozoic	1913.000	1697.622	BGS LithoStrat Upper
	Plenus Marl		2102.000	1837.953	BGS LithoStrat Upper
	Hidra	Mesozoic	2103.000	1838.685	BGS LithoStrat Upper
	Cromer Knoll	Mesozoic	2135.000	1862.054	BGS LithoStrat Upper
	Kimmeridge Clay		2297.000	1978.943	BGS LithoStrat Upper
	Fulmar Member		2362.000	2025.083	BGS LithoStrat Upper
	Skagerrak	Mesozoic	2420.000	2065.947	BGS LithoStrat Upper
	Turbot Anhydrite Formation	Palaeozoic	2462.000	2095.064	BGS LithoStrat Upper
21/23a- 8Y	Unknown		112.000	86.092	BGS LithoStrat Upper
	Unknown		893.000	867.038	BGS LithoStrat Upper
	Unknown		899.000	873.025	BGS LithoStrat Upper
	Lark Formation	Cenozoic	1018.000	990.307	BGS LithoStrat Upper
	Lark Formation	Cenozoic	1348.000	1265.899	BGS LithoStrat Upper
	Horda Formation	Cenozoic	1439.000	1314.999	BGS LithoStrat Upper
	Horda Formation	Cenozoic	1740.000	1365.397	BGS LithoStrat Upper
	Horda Formation	Cenozoic	2222.000	1374.000	BGS LithoStrat Upper
	Tay Sands		2553.000	1438.384	BGS LithoStrat Upper
	Balder	Cenozoic	2637.000	1477.736	BGS LithoStrat Upper
	Sele	Mesozoic	2641.000	1479.664	BGS LithoStrat Upper
	Lista	Mesozoic	2661.000	1489.405	BGS LithoStrat Upper
21/23a- 8Z	Unknown		112.000	86.092	BGS LithoStrat Upper
	Nordland	Cenozoic	869.000	843.092	BGS LithoStrat Upper
	Nordland	Cenozoic	893.000	867.092	BGS LithoStrat Upper
	Nordland	Cenozoic	899.000	873.092	BGS LithoStrat Upper
	Lark Formation	Cenozoic	1018.000	992.092	BGS LithoStrat Upper
	Lark Formation	Cenozoic	1348.000	1322.092	BGS LithoStrat Upper
	Horda Formation	Cenozoic	1439.000	1413.092	BGS LithoStrat Upper
	Horda Formation	Cenozoic	2289.000	2263.092	BGS LithoStrat Upper
	Tay Sands		2557.000	2531.092	BGS LithoStrat Upper
	Balder	Cenozoic	2672.000	2646.092	BGS LithoStrat Upper
	Sele	Mesozoic	2675.000	2649.092	BGS LithoStrat Upper
	Lista	Mesozoic	2688.000	2662.092	BGS LithoStrat Upper

Lithology Intervals

No lithology intervals ingested for this well.

Interpreted Data Inventory (LR / WellStrat)

Open Interpreted Data Log

Wellbore	Strat Intervals	Tops	HC Occ
21/23a- 8	17	17	2	View
21/23a- 8Y	12	12	1	View
21/23a- 8Z	12	12	1	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- 8	112.7760009765625	2474.82373046875	10	0	2026-08-06 17:27:28.85692+00	View Log
21/23a- 8Y	1645.9200439453125	2662.73291015625	5	0	2026-08-06 17:27:56.628195+00	View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser

21/23a- 8

Curve Type	Best Mnemonic	Source	Depth Start (m)	Depth Stop (m)	Samples
bulk_density	RHOZ	CGG Digital Well Logs	872.0328000000001	2474.8236	10518
caliper	HCAL	CGG Digital Well Logs	863.1936000000001	2462.6316	10496
comp_sonic	DT	CGG Digital Well Logs	863.1936000000001	2466.8988	10524
deep_resistivity	AHT90	CGG Digital Well Logs	865.3272000000001	2472.5376	10547
density_correction	HDRA	CGG Digital Well Logs	872.0328000000001	2474.8236	10518
gamma_ray	GR	CGG Digital Well Logs	112.77600000000001	2470.8612000000003	15432
med_resistivity	AHT30	CGG Digital Well Logs	865.3272000000001	2472.5376	10547
med_resistivity	AHT60	CGG Digital Well Logs	865.3272000000001	2472.5376	10547
med_resistivity	AHT20	CGG Digital Well Logs	865.3272000000001	2472.5376	10547
neutron_por	NPHI	CGG Digital Well Logs	836.0664	2472.3852	10738
neutron_por	HNPO	CGG Digital Well Logs	836.0664	2472.9948	10741
pef	PEFZ	CGG Digital Well Logs	872.0328000000001	2474.8236	10518
shallow_resistivity	AHT10	CGG Digital Well Logs	865.3272000000001	2472.5376	10547

21/23a- 8Y

Curve Type	Best Mnemonic	Source	Depth Start (m)	Depth Stop (m)	Samples
bulk_density	RHOB	CGG Digital Well Logs	1645.92	2647.7976000000003	6575
caliper	CALI	CGG Digital Well Logs	1673.6568	2648.1024	6395
density_correction	DRHO	CGG Digital Well Logs	1645.92	2647.7976000000003	6575
gamma_ray	GRC	CGG Digital Well Logs	1656.2832	2662.7328	6605
neutron_por	NLIM	CGG Digital Well Logs	1645.92	2647.9500000000003	6576

Survey Inventory (Deviation)

Open full Survey detail

Wellbore	Stations	Max MD (m)	Max TVDSS (m)	Survey File
21/23a- 8	73	2490.216	2114.512	D:\BigSpatial\nsta_raw\CGG_Deviation\21-23a-8 29432bd-CGG_Deviation.xlsx
21/23a- 8Y	83	2675.534	1496.516	D:\BigSpatial\nsta_raw\CGG_Deviation\21-23a-8Y 29448v-CGG_Deviation.xlsx
21/23a- 8Z	0	--	--	--

21/23a- 8

Well Header

Wellbores (3)

Formation Tops (41)

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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