Well Data Manager / Well Summary / 13/21a- 4

13/21a- 4

Decommissioned

Well Header

Well No

13/21a- 4

NSTA DEN No

5984

Well Name

Drill Seq No

Quadrant / Block

13 / 21 a

Surface Location

58.294485, -1.826097

Source Datum

ED50

Subsea Well

Unknown

Platform

Slot No

Operator

ITHACA ENERGY (UK) LIMITED

Original Operator

Sub Area Operator

ITHACA ENERGY (UK) LIMITED

Licence No

P185

Licence Type

Production

Spud Date

1996-11-16

Source File

nsta_feature_service

Imported

2026-05-22 15:28

Wellbores (1)

13/21a- 4 Original

Abandoned Phase 3 View Log Interpreted Data Survey

Current Intent

Appraisal

Original Intent

Appraisal

Flow Class

Oil Show

Dev Type

Convention

Primary Target

Well Seq

WB1

Datum Type

Kelly Bushing

Datum Elev (m)

24.994

Ground Elev (m)

17.678

Water Depth (m)

102.41

TD MD (m)

1049.122

TD TVDSS (m)

TD Datum Depth (m)

24.994

TD Datum Type

Kelly Bushing

Spud Date

1996-11-16

TD Reached

1996-11-29

Completion Date

1996-12-04

Release Date

2000-12-04

Formation Tops (10)

Wellbore	Formation	Era	MD (m)	TVDSS (m)	Provider
13/21a- 4	Montrose	Mesozoic	168.000	143.003	Lloyds Register
	Andrew Sandstone	Cenozoic	168.000	143.003	Lloyds Register
	Lista	Mesozoic	168.000	143.003	Lloyds Register
	Maureen	Mesozoic	385.000	359.989	Lloyds Register
	Upper Cretaceous Chalk	Mesozoic	467.000	441.984	Lloyds Register
	Chalk	Mesozoic	467.000	441.984	Lloyds Register
	Cromer Knoll	Mesozoic	884.000	858.970	Lloyds Register
	Lower Cretaceous Undifferentiated	Mesozoic	884.000	858.970	Lloyds Register
	Captain Sandstone	Mesozoic	885.000	859.970	Lloyds Register
	Wick Sandstone		885.000	859.970	Lloyds Register

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
13/21a- 4	3	5	2	12	10	1	0	1	0	View

Hydrocarbon Occurrence (2)

Wellbore	Category	Code	Formation / Litho	Top MD (m)	Base MD (m)	Notes
13/21a- 4	Oil shows	OS	LCAP	885.4440000000001	--	61 m thick
13/21a- 4	Oil shows	OS	LCAP	946.404	--	69 m thick

Rock Samples (1)

Wellbore	Sample	Top MD (m)	Base MD (m)	Key Lab Results	Comments	Notes
13/21a- 4	Cuttings	539.5	1091.79	--	--	--

Wireline Log Inventory (Ingested Curves)

Wellbore	Depth Start (m)	Depth Stop (m)	Typed Curves	Auto-scaled	Ingested
13/21a- 4	125.12039947509766	1092.2508544921875	11	0	2026-08-06 07:43:49.517338+00	View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser

13/21a- 4

Curve Type	Best Mnemonic	Source	Depth Start (m)	Depth Stop (m)	Samples
bulk_density	RHOB	CGG Digital Well Logs	526.8468	1064.2092	3527
caliper	CALS	CGG Digital Well Logs	187.9092	1091.0316	5871
comp_sonic	DTCO	CGG Digital Well Logs	187.9092	1075.7916	5650
comp_sonic	DT	CGG Digital Well Logs	526.8468	1075.7916	3603
comp_sonic	DTLF	CGG Digital Well Logs	526.8468	1075.7916	3603
deep_resistivity	LLD	CGG Digital Well Logs	187.9092	1081.8876	5831
density_correction	DRHO	CGG Digital Well Logs	526.8468	1064.2092	3527
gamma_ray	CGR	CGG Digital Well Logs	353.11080000000004	1055.6748	4611
gamma_ray	GR	CGG Digital Well Logs	125.1204	1069.3908000000001	6197
gamma_ray	SGR	CGG Digital Well Logs	353.11080000000004	1055.6748	4611
micro_resistivity	MSFL	CGG Digital Well Logs	187.9092	1092.2508	5881
neutron_por	NPHI	CGG Digital Well Logs	526.8468	1060.5516	3503
pef	PEF	CGG Digital Well Logs	526.8468	1064.2092	3527
potassium	POTA	CGG Digital Well Logs	526.8468	1055.0652	3467
shallow_resistivity	LLS	CGG Digital Well Logs	187.9092	1081.8876	5831
shear_sonic	DTSM	CGG Digital Well Logs	187.9092	1075.7916	5670
shear_sonic	DT4S	CGG Digital Well Logs	187.9092	959.9676000000001	3326
sp	SP	CGG Digital Well Logs	187.9092	1045.3116	5387
thorium	THOR	CGG Digital Well Logs	526.8468	1055.0652	3467
uranium	URAN	CGG Digital Well Logs	526.8468	1055.0652	3467

Survey Inventory (Deviation)

Open full Survey detail

Wellbore	Stations	Max MD (m)	Max TVDSS (m)	Survey File
13/21a- 4	25	1091.797	1066.736	D:\BigSpatial\nsta_raw\CGG_Deviation\13-21a-4 24743ar_CGG-Deviation.xlsx

13/21a- 4

Well Header

Wellbores (1)

Formation Tops (10)

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)

Related Documents