Well Data Manager / Well Summary / 21/27- 4

21/27- 4

Decommissioned

Well Header

Well No

21/27- 4

NSTA DEN No

4147

Well Name

Drill Seq No

Quadrant / Block

21 / 27

Surface Location

57.043493, 0.273474

Source Datum

ED50

Subsea Well

Platform

Slot No

Operator

SPIRIT ENERGY NORTH SEA OIL LIMITED

Original Operator

Sub Area Operator

SPIRIT ENERGY NORTH SEA OIL LIMITED

Licence No

P595

Licence Type

Production

Spud Date

1990-07-13

Source File

nsta_feature_service

Imported

2026-05-22 15:28

Wellbores (1)

21/27- 4 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

Kelly Bushing

Datum Elev (m)

26.213

Ground Elev (m)

Water Depth (m)

81.99

TD MD (m)

1228.950

TD TVDSS (m)

1202.737

TD Datum Depth (m)

26.213

TD Datum Type

Kelly Bushing

Spud Date

1990-07-13

TD Reached

1990-07-28

Completion Date

1990-08-03

Release Date

1994-08-03

Formation Tops (12)

Wellbore	Formation	Era	MD (m)	TVDSS (m)	Provider
21/27- 4	Horda	Cenozoic	789.000	762.695	Lloyds Register
	Stronsay	Cenozoic	789.000	762.695	Lloyds Register
	Upper Tay Sandstone		807.000	780.695	Lloyds Register
	Lower Tay Sandstone		935.000	908.695	Lloyds Register
	Balder	Cenozoic	968.000	941.695	Lloyds Register
	Moray	Mesozoic	968.000	941.695	Lloyds Register
	Balder Tuff	Cenozoic	986.000	959.695	Lloyds Register
	Sele	Mesozoic	1031.000	1004.694	Lloyds Register
	Lista	Mesozoic	1140.000	1113.692	Lloyds Register
	Montrose	Mesozoic	1140.000	1113.692	Lloyds Register
	Upper Cretaceous Chalk	Mesozoic	1193.000	1166.692	Lloyds Register
	Chalk	Mesozoic	1193.000	1166.692	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
21/27- 4	4	5	3	22	12	4	4	1	0	View

Hydrocarbon Occurrence (0)

No hydrocarbon shows or DSTs recorded for this well.

Rock Samples (23)

Wellbore	Sample	Top MD (m)	Base MD (m)	Key Lab Results	Comments	Notes
21/27- 4	Core #1	809.24	813.51	φ 33.2% (n=5) · Kh 0.0 mD (n=5) · Density 2.65 (n=5) · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 30.7, 900-psi-perc - 30.4 ; HOR PERM-KA 200-psi-millidarcies - 25.8, KL 900-psi-mD millidarcies - 0.006; POROSITY Est Overburden 600-psi-perc - 31.2, 900-psi-perc - 30.8 ; HOR PERM-KA 200-psi-millidarcies - 76.6, KL 900-psi-mD millidarcies - 0.023; POROSITY Est Overburden 600-psi-perc - 32.7, 900-psi-perc - 32.3 ; HOR PERM-KA 200-psi-millidarcies - 42.6, KL 900-psi-mD millidarcies - 0.012; POROSITY Est Overburden 600-psi-perc - 35, 900-psi-perc - 34.7 ; HOR PERM-KA 200-psi-millidarcies - 16.5, KL 900-psi-mD millidarcies - 0.019; POROSITY Est Overburden 600-psi-perc - 35.5, 900-psi-perc - 34.8 ; HOR PERM-KA 200-psi-millidarcies - 71.1, KL 900-psi-mD millidarcies - 0.062 \| SLEEVED SAMPLE	.
21/27- 4	↳ Plug 03	810.036	--	φ 31.5% · Kh 0.0 mD · Density 2.65 · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 31.2, 900-psi-perc - 30.8 ; HOR PERM-KA 200-psi-millidarcies - 76.6, KL 900-psi-mD millidarcies - 0.023 \| SLEEVED SAMPLE	--
21/27- 4	↳ Plug 05	810.463	--	φ 35.8% · Kh 0.0 mD · Density 2.66 · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 35.5, 900-psi-perc - 34.8 ; HOR PERM-KA 200-psi-millidarcies - 71.1, KL 900-psi-mD millidarcies - 0.062 \| SLEEVED SAMPLE	--
21/27- 4	↳ Plug 08	811.378	--	φ 32.9% · Kh 0.0 mD · Density 2.65 · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 32.7, 900-psi-perc - 32.3 ; HOR PERM-KA 200-psi-millidarcies - 42.6, KL 900-psi-mD millidarcies - 0.012 \| SLEEVED SAMPLE	--
21/27- 4	↳ Plug 11	812.292	--	φ 35.1% · Kh 0.0 mD · Density 2.66 · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 35, 900-psi-perc - 34.7 ; HOR PERM-KA 200-psi-millidarcies - 16.5, KL 900-psi-mD millidarcies - 0.019 \| SLEEVED SAMPLE	--
21/27- 4	↳ Plug 13	812.963	--	φ 30.7% · Kh 0.0 mD · Density 2.64 · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 30.7, 900-psi-perc - 30.4 ; HOR PERM-KA 200-psi-millidarcies - 25.8, KL 900-psi-mD millidarcies - 0.006 \| SLEEVED SAMPLE	--
21/27- 4	Core #2	819.0	825.55	φ 31.2% (n=5) · Kh 86.5 mD (n=5) · Density 2.72 (n=5) · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 25.8, 900-psi-perc - 25.7 ; HOR PERM-KA 200-psi-millidarcies - 76.5, KL 900-psi-mD millidarcies - 4.3; POROSITY Est Overburden 600-psi-perc - 26.7, 900-psi-perc - 26.3 ; HOR PERM-KA 200-psi-millidarcies - 66.1, KL 900-psi-mD millidarcies - 0.031; POROSITY Est Overburden 600-psi-perc - 31.3, 900-psi-perc - 31.1 ; HOR PERM-KA 200-psi-millidarcies - 428, KL 900-psi-mD millidarcies - 20.1; POROSITY Est Overburden 600-psi-perc - 34.5, 900-psi-perc - 34.3 ; HOR PERM-KA 200-psi-millidarcies - 184, KL 900-psi-mD millidarcies - 17.5; POROSITY Est Overburden 600-psi-perc - 35.5, 900-psi-perc - 35.3 ; HOR PERM-KA 200-psi-millidarcies - 849, KL 900-psi-mD millidarcies - 232 \| SLEEVED SAMPLE	.
21/27- 4	↳ Plug 30	823.204	--	φ 26.0% · Kh 4.7 mD · Density 2.84 · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 25.8, 900-psi-perc - 25.7 ; HOR PERM-KA 200-psi-millidarcies - 76.5, KL 900-psi-mD millidarcies - 4.3 \| SLEEVED SAMPLE	--
21/27- 4	↳ Plug 33	824.362	--	φ 26.8% · Kh 0.0 mD · Density 2.75 · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 26.7, 900-psi-perc - 26.3 ; HOR PERM-KA 200-psi-millidarcies - 66.1, KL 900-psi-mD millidarcies - 0.031 \| SLEEVED SAMPLE	--
21/27- 4	↳ Plug 34	824.575	--	φ 32.0% · Kh 22.9 mD · Density 2.66 · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 31.3, 900-psi-perc - 31.1 ; HOR PERM-KA 200-psi-millidarcies - 428, KL 900-psi-mD millidarcies - 20.1 \| SLEEVED SAMPLE	--
21/27- 4	↳ Plug 35	824.972	--	φ 36.0% · Kh 384.0 mD · Density 2.66 · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 35.5, 900-psi-perc - 35.3 ; HOR PERM-KA 200-psi-millidarcies - 849, KL 900-psi-mD millidarcies - 232 \| SLEEVED SAMPLE	--
21/27- 4	↳ Plug 36	825.155	--	φ 35.1% · Kh 20.9 mD · Density 2.67 · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 34.5, 900-psi-perc - 34.3 ; HOR PERM-KA 200-psi-millidarcies - 184, KL 900-psi-mD millidarcies - 17.5 \| SLEEVED SAMPLE	--
21/27- 4	Core #3	828.75	829.82	φ 36.6% (n=2) · Kh 340.0 mD (n=2) · Density 2.63 (n=2) · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 35.2, 900-psi-perc - 35 ; HOR PERM-KA 200-psi-millidarcies - 1900, KL 900-psi-mD millidarcies - 238; POROSITY Est Overburden 600-psi-perc - 37.2, 900-psi-perc - 37 ; HOR PERM-KA 200-psi-millidarcies - 2060, KL 900-psi-mD millidarcies - 254 \| SLEEVED SAMPLE	.
21/27- 4	↳ Plug 38	828.812	--	φ 35.6% · Kh 318.0 mD · Density 2.66 · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 35.2, 900-psi-perc - 35 ; HOR PERM-KA 200-psi-millidarcies - 1900, KL 900-psi-mD millidarcies - 238 \| SLEEVED SAMPLE	--
21/27- 4	↳ Plug 39	829.026	--	φ 37.7% · Kh 362.0 mD · Density 2.61 · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 37.2, 900-psi-perc - 37 ; HOR PERM-KA 200-psi-millidarcies - 2060, KL 900-psi-mD millidarcies - 254 \| SLEEVED SAMPLE	--
21/27- 4	Core #5	842.77	858.62	φ 29.7% (n=6) · Kh 1951.8 mD (n=6) · Density 2.65 (n=6) · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 2.3, 900-psi-perc - 1.7 ; HOR PERM-KA 200-psi-millidarcies - 0.01, KL 900-psi-mD millidarcies - 0.011; POROSITY Est Overburden 600-psi-perc - 33.6, 900-psi-perc - 33.4 ; HOR PERM-KA 200-psi-millidarcies - 6140, KL 900-psi-mD millidarcies - 800; POROSITY Est Overburden 600-psi-perc - 34, 900-psi-perc - 33.6 ; HOR PERM-KA 200-psi-millidarcies - 6430, KL 900-psi-mD millidarcies - 498; POROSITY Est Overburden 600-psi-perc - 34.4, 900-psi-perc - 34 ; HOR PERM-KA 200-psi-millidarcies - 6410, KL 900-psi-mD millidarcies - 883; POROSITY Est Overburden 600-psi-perc - 36, 900-psi-perc - 35.5 ; HOR PERM-KA 200-psi-millidarcies - 11240, KL 900-psi-mD millidarcies - 1670; POROSITY Est Overburden 600-psi-perc - 36.5, 900-psi-perc - 35.1 ; HOR PERM-KA 200-psi-millidarcies - 9310, KL 900-psi-mD millidarcies - 1750 \| SLEEVED SAMPLE; SST, VERY FINE, MODERATELY ARGILLACEOUS, WELL INDURATED, COMMON CALCAREOUS CEMENT, SL PYRITE, SL MICA, TRACES OF ?GLAUCONITE, TRACES OF LAMINATIONS.	no core 4 - see transmittal .
21/27- 4	↳ Plug 57	847.222	--	φ 2.4% · Kh 0.0 mD · Density 2.67 · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 2.3, 900-psi-perc - 1.7 ; HOR PERM-KA 200-psi-millidarcies - 0.01, KL 900-psi-mD millidarcies - 0.011 \| SST, VERY FINE, MODERATELY ARGILLACEOUS, WELL INDURATED, COMMON CALCAREOUS CEMENT, SL PYRITE, SL MICA, TRACES OF ?GLAUCONITE, TRACES OF LAMINATIONS.	--
21/27- 4	↳ Plug 84	855.65	--	φ 34.7% · Kh 1280.0 mD · Density 2.65 · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 34.4, 900-psi-perc - 34 ; HOR PERM-KA 200-psi-millidarcies - 6410, KL 900-psi-mD millidarcies - 883 \| SLEEVED SAMPLE	--
21/27- 4	↳ Plug 85	855.878	--	φ 33.8% · Kh 931.0 mD · Density 2.64 · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 33.6, 900-psi-perc - 33.4 ; HOR PERM-KA 200-psi-millidarcies - 6140, KL 900-psi-mD millidarcies - 800 \| SLEEVED SAMPLE	--
21/27- 4	↳ Plug 86	856.183	--	φ 34.4% · Kh 1200.0 mD · Density 2.64 · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 34, 900-psi-perc - 33.6 ; HOR PERM-KA 200-psi-millidarcies - 6430, KL 900-psi-mD millidarcies - 498 \| SLEEVED SAMPLE	--
21/27- 4	↳ Plug 89	857.235	--	φ 36.8% · Kh 4600.0 mD · Density 2.65 · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 36.5, 900-psi-perc - 35.1 ; HOR PERM-KA 200-psi-millidarcies - 9310, KL 900-psi-mD millidarcies - 1750 \| SLEEVED SAMPLE	--
21/27- 4	↳ Plug 90	857.463	--	φ 36.3% · Kh 3700.0 mD · Density 2.64 · ROBERTSON GROUP PLC	POROSITY Est Overburden 600-psi-perc - 36, 900-psi-perc - 35.5 ; HOR PERM-KA 200-psi-millidarcies - 11240, KL 900-psi-mD millidarcies - 1670 \| SLEEVED SAMPLE	--
21/27- 4	Cuttings	1289.97	4031.96	--	--	.

Wireline Log Inventory (Ingested Curves)

Wellbore	Depth Start (m)	Depth Stop (m)	Typed Curves	Auto-scaled	Ingested
21/27- 4	103.7844009399414	1228.191650390625	12	0	2026-08-06 10:23:11.675916+00	View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser

21/27- 4

Curve Type	Best Mnemonic	Source	Depth Start (m)	Depth Stop (m)	Samples
bulk_density	RHOB	CGG Digital Well Logs	769.3152	989.8380000000001	1448
caliper	CALI	CGG Digital Well Logs	769.0104	989.8380000000001	1450
caliper	CALS	CGG Digital Well Logs	769.0104	979.1700000000001	1380
caliper	CAL	CGG Digital Well Logs	374.2944	1206.7032000000002	5377
comp_sonic	DTLF	CGG Digital Well Logs	374.5992	1216.152	5489
deep_resistivity	LLD	CGG Digital Well Logs	770.3820000000001	987.2472	1424
deep_resistivity	IDER	CGG Digital Well Logs	770.9916000000001	1226.8200000000002	2992
deep_resistivity	ILD	CGG Digital Well Logs	375.5136	774.0396000000001	2616
density_correction	DRHO	CGG Digital Well Logs	769.9248	989.8380000000001	1444
gamma_ray	GRL	CGG Digital Well Logs	755.142	980.3892000000001	1479
gamma_ray	SGR	CGG Digital Well Logs	757.5804	981.9132000000001	1473
gamma_ray	GR	CGG Digital Well Logs	103.7844	1218.7428	7317
gamma_ray	CGR	CGG Digital Well Logs	757.7328	981.9132000000001	1472
med_resistivity	IMER	CGG Digital Well Logs	770.8392	1227.582	2998
med_resistivity	ILM	CGG Digital Well Logs	374.904	774.8016	2625
micro_resistivity	MSFL	CGG Digital Well Logs	770.3820000000001	979.1700000000001	1371
neutron_por	NPHI	CGG Digital Well Logs	769.1628000000001	984.0468000000001	1411
pef	PEF	CGG Digital Well Logs	769.1628000000001	989.8380000000001	1449
potassium	POTA	CGG Digital Well Logs	757.5804	981.9132000000001	1473
shallow_resistivity	SFLU	CGG Digital Well Logs	374.5992	1228.1916	5602
shallow_resistivity	LLS	CGG Digital Well Logs	770.2296	987.3996000000001	1426
sp	SP	CGG Digital Well Logs	374.5992	772.3632	2611
thorium	THOR	CGG Digital Well Logs	757.5804	981.9132000000001	1473
uranium	URAN	CGG Digital Well Logs	757.428	981.9132000000001	1474

Survey Inventory (Deviation)

Open full Survey detail

Wellbore	Stations	Max MD (m)	Max TVDSS (m)	Survey File
21/27- 4	8	1228.954	1202.645	D:\BigSpatial\nsta_raw\CGG_Deviation\21-27-4 11361bj_CGG-Deviation.xlsx

21/27- 4

Well Header

Wellbores (1)

Formation Tops (12)

Lithology Intervals

Interpreted Data Inventory (LR / WellStrat)

Hydrocarbon Occurrence (0)

Rock Samples (23)

Wireline Log Inventory (Ingested Curves)

Source LAS Manifest (Best Curve per Type)

Survey Inventory (Deviation)

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