Well Data Manager / Well Summary / 21/28a- 10

21/28a- 10

Decommissioned

Well Header

Well No

21/28a- 10

NSTA DEN No

19566

Well Name

Drill Seq No

Quadrant / Block

21 / 28 a

Surface Location

57.156430, 0.525254

Source Datum

ED50

Subsea Well

Unknown

Platform

Slot No

Operator

ANTRIM ENERGY (VENTURES) LIMITED

Original Operator

Sub Area Operator

ANTRIM ENERGY (VENTURES) LIMITED

Licence No

P77

Licence Type

Production

Spud Date

2008-07-13

Source File

nsta_feature_service

Imported

2026-05-22 15:28

Wellbores (2)

21/28a- 10 Original

Abandoned Phase 3 View Log Interpreted Data Survey

Current Intent

Appraisal

Original Intent

Appraisal

Flow Class

Oil Well

Dev Type

Convention

Primary Target

Well Seq

WB1

Datum Type

Rotary Table

Datum Elev (m)

22.555

Ground Elev (m)

Water Depth (m)

88.39

TD MD (m)

1486.814

TD TVDSS (m)

1453.340

TD Datum Depth (m)

22.555

TD Datum Type

Rotary Table

Spud Date

2008-07-13

TD Reached

2008-07-20

Completion Date

2008-07-23

Release Date

2012-07-23

21/28a- 10Z Sidetrack Z parent: 21/28a- 10

Abandoned Phase 3 View Log Interpreted Data Survey

Current Intent

Appraisal

Original Intent

Appraisal

Flow Class

Oil Well

Dev Type

Convention

Primary Target

ST1

Well Seq

WB2

Datum Type

Rotary Table

Datum Elev (m)

22.555

Ground Elev (m)

Water Depth (m)

88.39

TD MD (m)

1454.201

TD TVDSS (m)

1389.888

TD Datum Depth (m)

22.555

TD Datum Type

Rotary Table

Spud Date

2008-07-24

TD Reached

2008-07-28

Completion Date

2015-09-13

Release Date

2019-09-13

Formation Tops (14)

Wellbore	Formation	Era	MD (m)	TVDSS (m)	Provider
21/28a- 10	Horda	Cenozoic	1226.000	1197.130	Lloyds Register
	Stronsay	Cenozoic	1226.000	1197.130	Lloyds Register
	Upper Tay Sandstone		1306.000	1275.896	Lloyds Register
	Lower Tay Sandstone		1421.000	1388.869	Lloyds Register
	Montrose	Mesozoic	1431.000	1398.682	Lloyds Register
	Lista	Mesozoic	1431.000	1398.682	Lloyds Register
21/28a- 10Z	Undifferentiated	Cenozoic	111.000	88.445	BGS LithoStrat Upper
	Nordland	Cenozoic	510.000	487.416	BGS LithoStrat Upper
	Lark Formation	Cenozoic	863.000	839.607	BGS LithoStrat Upper
	Horda Formation	Cenozoic	1227.000	1195.231	BGS LithoStrat Upper
	Upper Tay Shale Unit	Palaeozoic	1308.000	1274.667	BGS LithoStrat Upper
	Middle Tay Sand Unit		1380.000	1345.064	BGS LithoStrat Upper
	Lower Tay Sands		1423.000	1387.047	BGS LithoStrat Upper
	Lista	Mesozoic	1436.000	1399.743	BGS LithoStrat Upper

Lithology Intervals

21/28a- 10 Curve: SANDCOUNT 16 intervals · MD 1306.525 – 1431.036 m G:/NSTA_BigFiles/NSTA_Packages/Lloyds_Register/NSTA Centr...

Sandstone (16)

Interpreted Data Inventory (LR / WellStrat)

Open Interpreted Data Log

Wellbore	Groups	Formations	Members	Strat Intervals	Tops	HC Occ	Core	Cuttings	DSTs
21/28a- 10	2	2	2	9	6	1	0	0	0	View
21/28a- 10Z	0	0	0	8	8	1	0	0	1	View

Hydrocarbon Occurrence (3)

Wellbore	Category	Code	Formation / Litho	Top MD (m)	Base MD (m)	Notes
21/28a- 10Z	Mixed shows	OWGS	MTSU	1379.5248000000001	--	44 m thick
21/28a- 10Z	DST	DST 1	--	1389.3	1443.8	Label / Alba
21/28a- 10Z	Mixed shows	OWGS	LTSS	1423.4160000000002	--	12 m thick

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
21/28a- 10	182.4228057861328	1479.8040771484375	8	0	2026-08-08 17:43:20.210387+00	View Log
21/28a- 10Z	780.8975830078125	1453.286376953125	5	0	2026-08-06 17:29:05.326551+00	View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser

21/28a- 10

Curve Type	Best Mnemonic	Source	Depth Start (m)	Depth Stop (m)	Samples
bulk_density	RHOB	CGG Digital Well Logs	762.0	1456.3344000000002	4557
caliper	CALI	CGG Digital Well Logs	767.4864	1456.944	4525
density_correction	DRHO	CGG Digital Well Logs	762.0	1456.3344000000002	4557
gamma_ray	GR	CGG Digital Well Logs	1280.16	1475.0796	1280
gamma_ray	GRC	CGG Digital Well Logs	182.4228	1471.2696	8458
neutron_por	NLIM	CGG Digital Well Logs	758.952	1456.3344000000002	4577
nmr_free_fluid_index	CMFF	CGG Digital Well Logs	1280.16	1479.804	1311
nmr_porosity	TCMR	CGG Digital Well Logs	1280.16	1479.804	1311
nmr_porosity	CMRP_3MS	CGG Digital Well Logs	1280.16	1479.804	1311
nmr_t2	T2LM	CGG Digital Well Logs	1280.16	1479.804	1311

21/28a- 10Z

Curve Type	Best Mnemonic	Source	Depth Start (m)	Depth Stop (m)	Samples
bulk_density	RHOB	CGG Digital Well Logs	1389.2784000000001	1420.9776000000002	209
caliper	CALI	CGG Digital Well Logs	1389.2784000000001	1421.2824	211
density_correction	DRHO	CGG Digital Well Logs	1389.2784000000001	1420.9776000000002	209
gamma_ray	GRC	CGG Digital Well Logs	780.8976	1453.2864000000002	4413
neutron_por	NLIM	CGG Digital Well Logs	1386.8400000000001	1421.13	226

Survey Inventory (Deviation)

Open full Survey detail

Wellbore	Stations	Max MD (m)	Max TVDSS (m)	Survey File
21/28a- 10	48	1486.814	1453.340	D:\BigSpatial\nsta_raw\CGG_Deviation\21-28a-10 30021ch-CGG-deviation.xlsx
21/28a- 10Z	47	1454.201	1417.519	D:\BigSpatial\nsta_raw\CGG_Deviation\21-28a-10Z 30040aa-CGG-deviation.xlsx

21/28a- 10

Well Header

Wellbores (2)

Formation Tops (14)

Lithology Intervals

Interpreted Data Inventory (LR / WellStrat)

Hydrocarbon Occurrence (3)

Rock Samples (0)

Wireline Log Inventory (Ingested Curves)

Source LAS Manifest (Best Curve per Type)

Survey Inventory (Deviation)

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