Well Data Manager / Well Summary / 21/28a- 9

21/28a- 9

Decommissioned

Well Header

Well No

21/28a- 9

NSTA DEN No

19086

Well Name

Drill Seq No

Quadrant / Block

21 / 28 a

Surface Location

57.147505, 0.541360

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

2008-03-13

Source File

nsta_feature_service

Imported

2026-05-22 15:28

Wellbores (3)

21/28a- 9 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)

87.78

TD MD (m)

1625.194

TD TVDSS (m)

736.700

TD Datum Depth (m)

22.555

TD Datum Type

Rotary Table

Spud Date

2008-03-13

TD Reached

2008-03-26

Completion Date

2008-03-31

Release Date

2012-03-31

21/28a- 9Y Sidetrack Y parent: 21/28a- 9Z

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

WB3

Datum Type

Rotary Table

Datum Elev (m)

22.555

Ground Elev (m)

Water Depth (m)

87.78

TD MD (m)

1798.320

TD TVDSS (m)

1458.468

TD Datum Depth (m)

22.555

TD Datum Type

Rotary Table

Spud Date

2008-04-04

TD Reached

2008-04-05

Completion Date

2015-09-12

Release Date

2019-09-12

21/28a- 9Z Sidetrack Z parent: 21/28a- 9

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

WB2

Datum Type

Rotary Table

Datum Elev (m)

22.555

Ground Elev (m)

Water Depth (m)

87.78

TD MD (m)

1918.716

TD TVDSS (m)

1439.450

TD Datum Depth (m)

22.555

TD Datum Type

Rotary Table

Spud Date

2008-03-31

TD Reached

2008-04-01

Completion Date

2008-04-04

Release Date

2012-04-04

Formation Tops (25)

Wellbore	Formation	Era	MD (m)	TVDSS (m)	Provider
21/28a- 9	Undifferentiated	Cenozoic	109.000	86.445	BGS LithoStrat Upper
	Nordland	Cenozoic	498.000	475.436	BGS LithoStrat Upper
	Lark Formation	Cenozoic	863.000	840.430	BGS LithoStrat Upper
	Horda Formation	Cenozoic	1221.000	1198.411	BGS LithoStrat Upper
	Upper Tay Sandstone Member	Cenozoic	1312.000	1289.400	BGS LithoStrat Upper
	Middle Tay Sand Unit		1386.000	1363.391	BGS LithoStrat Upper
	Tay Sandstone Member (Lower)	Cenozoic	1429.000	1406.386	BGS LithoStrat Upper
	Lista	Mesozoic	1442.000	1419.385	BGS LithoStrat Upper
	Chalk	Mesozoic	1557.000	1534.375	BGS LithoStrat Upper
21/28a- 9Y	Unknown		109.000	86.445	BGS LithoStrat Upper
	Nordland	Cenozoic	732.000	709.433	BGS LithoStrat Upper
	Lark Formation	Cenozoic	866.000	843.290	BGS LithoStrat Upper
	Horda Formation	Cenozoic	1291.000	1202.389	BGS LithoStrat Upper
	Upper Tay Sandstone Member	Cenozoic	1473.000	1292.274	BGS LithoStrat Upper
	Middle Tay Sand Unit		1598.000	1353.277	BGS LithoStrat Upper
	Tay Sandstone Member (Lower)	Cenozoic	1671.000	1391.110	BGS LithoStrat Upper
	Lista	Mesozoic	1691.000	1401.688	BGS LithoStrat Upper
21/28a- 9Z	Unknown		109.000	86.445	BGS LithoStrat Upper
	Nordland	Cenozoic	701.000	678.434	BGS LithoStrat Upper
	Lark Formation	Cenozoic	868.000	844.916	BGS LithoStrat Upper
	Horda Formation	Cenozoic	1257.000	1185.755	BGS LithoStrat Upper
	Upper Tay Sandstone Member	Cenozoic	1451.000	1289.064	BGS LithoStrat Upper
	Middle Tay Sand Unit		1716.000	1374.086	BGS LithoStrat Upper
	Tay Sandstone Member (Lower)	Cenozoic	1825.000	1416.409	BGS LithoStrat Upper
	Lista	Mesozoic	1840.000	1423.364	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	DSTs
21/28a- 9	9	9	1	0	View
21/28a- 9Y	8	8	1	1	View
21/28a- 9Z	8	8	1	0	View

Hydrocarbon Occurrence (1)

Wellbore	Category	Code	Formation / Litho	Top MD (m)	Base MD (m)	Notes
21/28a- 9Y	DST	DST 1	--	1612.1	1664.2	Label / Alba

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	Ingested
21/28a- 9	194.1575927734375	1612.54443359375	9	2026-08-08 17:43:21.867371+00	View Log
21/28a- 9Y	805.1292114257812	1781.251220703125	4	2026-08-06 10:23:56.932479+00	View Log
21/28a- 9Z	799.4904174804688	1905.3048095703125	5	2026-08-06 10:23:57.536946+00	View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser

21/28a- 9

Curve Type	Best Mnemonic	Source	Depth Start (m)	Depth Stop (m)	Samples
bulk_density	RHOB	CGG Digital Well Logs	760.6284	1590.4464	5446
caliper	CALI	CGG Digital Well Logs	759.5616	1590.7512000000002	5455
density_correction	DRHO	CGG Digital Well Logs	760.6284	1590.4464	5446
gamma_ray	GRC	CGG Digital Well Logs	194.1576	1612.5444	9308
gamma_ray	GR_EDTC	CGG Digital Well Logs	1295.4	1462.8876	1100
neutron_por	NLIM	CGG Digital Well Logs	748.5888	1590.5988	5526
nmr_free_fluid_index	CMFF	CGG Digital Well Logs	1295.4	1462.8876	1100
nmr_porosity	TCMR	CGG Digital Well Logs	1295.4	1462.8876	1100
nmr_porosity	CMRP_3MS	CGG Digital Well Logs	1295.4	1462.8876	1100
nmr_t2	T2LM	CGG Digital Well Logs	1295.4	1462.8876	1100
pef	PE	CGG Digital Well Logs	762.0	1590.4464	5437

21/28a- 9Y

Curve Type	Best Mnemonic	Source	Depth Start (m)	Depth Stop (m)	Samples
bulk_density	RHOB	CGG Digital Well Logs	805.1292000000001	1759.458	6263
caliper	CALI	CGG Digital Well Logs	805.1292000000001	1759.7628000000002	6265
density_correction	DRHO	CGG Digital Well Logs	805.1292000000001	1759.458	6263
gamma_ray	GRC	CGG Digital Well Logs	805.1292000000001	1781.2512000000002	6406

21/28a- 9Z

Curve Type	Best Mnemonic	Source	Depth Start (m)	Depth Stop (m)	Samples
bulk_density	RHOB	CGG Digital Well Logs	799.4904	1883.2068000000002	7112
caliper	CALI	CGG Digital Well Logs	799.4904	1883.5116	7114
comp_sonic	DTC	CGG Digital Well Logs	868.5276	1876.6536	6300
density_correction	DRHO	CGG Digital Well Logs	799.4904	1883.2068000000002	7112
gamma_ray	GRC	CGG Digital Well Logs	799.6428000000001	1905.3048000000001	7256

Survey Inventory (Deviation)

Open full Survey detail

Wellbore	Stations	Max MD (m)	Max TVDSS (m)	Survey File
21/28a- 9	53	1625.194	1602.565	D:\BigSpatial\nsta_raw\CGG_Deviation\21-28a-9 7026ch-CGG-deviation.xlsx
21/28a- 9Y	58	1798.320	1458.336	D:\BigSpatial\nsta_raw\CGG_Deviation\21-28a-9Y 29946v-CGG-deviation.xlsx
21/28a- 9Z	64	1918.716	1462.008	D:\BigSpatial\nsta_raw\CGG_Deviation\21-28a-9Z 29947u-CGG-deviation.xlsx

21/28a- 9

Well Header

Wellbores (3)

Formation Tops (25)

Lithology Intervals

Interpreted Data Inventory (LR / WellStrat)

Hydrocarbon Occurrence (1)

Rock Samples (0)

Wireline Log Inventory (Ingested Curves)

Source LAS Manifest (Best Curve per Type)

Survey Inventory (Deviation)

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