Well Data Manager / Well Summary / 21/28a- 6

21/28a- 6

Decommissioned

Well Header

Well No

21/28a- 6

NSTA DEN No

4060

Well Name

Drill Seq No

Quadrant / Block

21 / 28 a

Surface Location

57.105748, 0.498977

Source Datum

ED50

Subsea Well

Platform

Slot No

Operator

NEO NEXT+ ENERGY (ZNI) LIMITED

Original Operator

Sub Area Operator

NEO NEXT+ ENERGY (ZNI) LIMITED

Licence No

P77

Licence Type

Production

Spud Date

1990-05-10

Source File

nsta_feature_service

Imported

2026-05-22 15:28

Wellbores (1)

21/28a- 6 Original

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

WB1

Datum Type

Kelly Bushing

Datum Elev (m)

25.908

Ground Elev (m)

Water Depth (m)

85.34

TD MD (m)

1584.960

TD TVDSS (m)

1499.616

TD Datum Depth (m)

25.908

TD Datum Type

Kelly Bushing

Spud Date

1990-05-10

TD Reached

1990-05-25

Completion Date

1990-06-19

Release Date

1994-06-19

Formation Tops (12)

Wellbore	Formation	Era	MD (m)	TVDSS (m)	Provider
21/28a- 6	Horda	Cenozoic	1161.000	1135.080	Lloyds Register
	Stronsay	Cenozoic	1161.000	1135.080	Lloyds Register
	Upper Tay Sandstone		1248.000	1222.078	Lloyds Register
	Lower Tay Sandstone		1323.000	1297.077	Lloyds Register
	Balder	Cenozoic	1359.000	1329.827	Lloyds Register
	Moray	Mesozoic	1359.000	1329.827	Lloyds Register
	Balder Sandstone		1359.000	1329.827	Lloyds Register
	Sele	Mesozoic	1403.000	1329.827	Lloyds Register
	Montrose	Mesozoic	1509.000	1329.827	Lloyds Register
	Lista	Mesozoic	1509.000	1329.827	Lloyds Register
	Chalk	Mesozoic	1526.000	1329.827	Lloyds Register
	Upper Cretaceous Chalk	Mesozoic	1526.000	1329.827	Lloyds Register

Lithology Intervals

21/28a- 6 Curve: SANDCOUNT 24 intervals · MD 911.047 – 1589.380 m G:/NSTA_BigFiles/NSTA_Packages/Lloyds_Register/NSTA Centr...

Sandstone (16)

Limestone (8)

Interpreted Data Inventory (LR / WellStrat)

Open Interpreted Data Log

Wellbore	Groups	Formations	Members	Strat Intervals	Tops	HC Occ	Core	Cuttings	DSTs
21/28a- 6	4	5	3	14	12	1	0	1	1	View

Hydrocarbon Occurrence (2)

Wellbore	Category	Code	Formation / Litho	Top MD (m)	Base MD (m)	Notes
21/28a- 6	Mixed shows	OGS	Strathtay Formation	1247.8512	--	75 m thick
21/28a- 6	DST	DST 1	--	1252.7	1267.4	Label / Alba

Rock Samples (1)

Wellbore	Sample	Top MD (m)	Base MD (m)	Key Lab Results	Comments	Notes
21/28a- 6	Cuttings	847.34	1584.96	--	--	too small to sample .

Wireline Log Inventory (Ingested Curves)

Wellbore	Depth Start (m)	Depth Stop (m)	Typed Curves	Auto-scaled	Ingested
21/28a- 6	89.91600036621094	1584.9599609375	12	0	2026-08-06 10:23:46.113199+00	View Log

Source LAS Manifest (Best Curve per Type)

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21/28a- 6

Curve Type	Best Mnemonic	Source	Depth Start (m)	Depth Stop (m)	Samples
bulk_density	RHOB	CGG Digital Well Logs	834.6948	1584.8076	4923
caliper	CAL	CGG Digital Well Logs	834.5424	1564.8432	4793
caliper	CALI	CGG Digital Well Logs	834.5424	1584.8076	4924
caliper	CALS	CGG Digital Well Logs	834.6948	1573.8348	4851
comp_sonic	DT	CGG Digital Well Logs	834.6948	1571.2440000000001	4834
deep_resistivity	LLG	CGG Digital Well Logs	836.3712	1581.15	4888
deep_resistivity	ILD	CGG Digital Well Logs	836.2188	1582.9788	4901
deep_resistivity	LLD	CGG Digital Well Logs	836.5236	1581.15	4887
density_correction	DRHO	CGG Digital Well Logs	792.0228000000001	1584.8076	5067
gamma_ray	GR	CGG Digital Well Logs	89.91600000000001	1577.0352	9759
gamma_ray	GRD	CGG Digital Well Logs	792.3276000000001	1576.7304000000001	5148
gamma_ray	GRL	CGG Digital Well Logs	790.8036000000001	1575.054	5147
med_resistivity	ILM	CGG Digital Well Logs	836.3712	1583.7408	4905
micro_resistivity	MSFL	CGG Digital Well Logs	835.7616	1573.8348	4844
neutron_por	NPHI	CGG Digital Well Logs	834.6948	1579.626	4889
pef	PEF	CGG Digital Well Logs	834.5424	1584.96	4925
shallow_resistivity	LLS	CGG Digital Well Logs	836.5236	1581.15	4887
shallow_resistivity	SFLU	CGG Digital Well Logs	836.3712	1583.5884	4904
sp	SP	CGG Digital Well Logs	834.6948	1582.674	4909

Survey Inventory (Deviation)

Open full Survey detail

Wellbore	Stations	Max MD (m)	Max TVDSS (m)	Survey File
21/28a- 6	43	1355.750	1329.827	D:\BigSpatial\nsta_raw\CGG_Deviation\21-28a-6 10912av_CGG-Deviation.xlsx

21/28a- 6

Well Header

Wellbores (1)

Formation Tops (12)

Lithology Intervals

Interpreted Data Inventory (LR / WellStrat)

Hydrocarbon Occurrence (2)

Rock Samples (1)

Wireline Log Inventory (Ingested Curves)

Source LAS Manifest (Best Curve per Type)

Survey Inventory (Deviation)

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