Well Data Manager / Well Summary / 211/23b- 12

211/23b- 12

Decommissioned

Well Header

Well No

211/23b- 12

NSTA DEN No

5359

Well Name

Drill Seq No

Quadrant / Block

211 / 23 b

Surface Location

61.203586, 1.495203

Source Datum

ED50

Subsea Well

Unknown

Platform

Slot No

Operator

FAIRFIELD BETULA LIMITED

Original Operator

Sub Area Operator

FAIRFIELD BETULA LIMITED

Licence No

P721

Licence Type

Production

Spud Date

1994-10-25

Source File

nsta_feature_service

Imported

2026-05-22 15:28

Wellbores (2)

211/23b- 12 Original

Abandoned Phase 3 View Log Interpreted Data Survey

Current Intent

Exploration

Original Intent

Exploration

Flow Class

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)

149.35

TD MD (m)

3368.040

TD TVDSS (m)

3340.608

TD Datum Depth (m)

25.908

TD Datum Type

Rotary Table

Spud Date

1994-10-25

TD Reached

1994-12-06

Completion Date

1994-12-24

Release Date

1998-12-24

211/23b- 12Z Sidetrack Z parent: 211/23b- 12

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

WB2

Datum Type

Kelly Bushing

Datum Elev (m)

25.908

Ground Elev (m)

Water Depth (m)

149.35

TD MD (m)

3764.280

TD TVDSS (m)

3065.983

TD Datum Depth (m)

25.908

TD Datum Type

Rotary Table

Spud Date

1994-12-24

TD Reached

1995-02-03

Completion Date

1995-02-16

Release Date

1999-02-16

Formation Tops (7)

Wellbore	Formation	Era	MD (m)	TVDSS (m)	Provider
211/23b- 12	Shetland	Mesozoic	1835.000	1809.012	Ternan
	Brent	Mesozoic	2940.000	2913.936	Ternan
	Cook	Mesozoic	3178.000	3151.548	Ternan
	Nansen	Mesozoic	3295.000	3267.989	Ternan
	Cormorant	Mesozoic	3308.000	3280.918	Ternan
211/23b- 12Z	Shetland	Mesozoic	1915.000	1889.092	Ternan
	Brent	Mesozoic	3493.000	3467.092	Ternan

Lithology Intervals

211/23b- 12 Curve: SANDCOUNT 109 intervals · MD 173.736 – 3358.744 m G:/NSTA_BigFiles/NSTA_Packages/Lloyds_Register/NNS, ESP, ...

Sandstone (84)

Limestone (21)

Coal (4)

Interpreted Data Inventory (LR / WellStrat)

Open Interpreted Data Log

Wellbore	Groups	Formations	Members	Strat Intervals	Tops	HC Occ	Core	Cuttings	DSTs
211/23b- 12	0	0	0	24	5	0	2	1	0	View
211/23b- 12Z	0	0	0	18	2	0	0	1	0	View

Hydrocarbon Occurrence (4)

Wellbore	Category	Code	Formation / Litho	Top MD (m)	Base MD (m)	Notes
211/23b- 12	Oil	OW	Heather Formation	2929.128	--	11 m thick
211/23b- 12	Oil	OW	Tarbert Formation	2940.1008	--	20 m thick
211/23b- 12Z	Oil shows	OS	Heather Formation	3453.9936000000002	--	39 m thick
211/23b- 12Z	Oil shows	OS	Ness Formation	3493.0080000000003	--	109 m thick

Rock Samples (4)

Wellbore	Sample	Top MD (m)	Base MD (m)	Key Lab Results	Comments	Notes
211/23b- 12	Cuttings	502.92	3368.04	--	--	--
211/23b- 12	Core #1	2939.49	2964.73	--	--	--
211/23b- 12	Core #2	2964.79	2981.58	--	--	--
211/23b- 12Z	Cuttings	1307.59	3764.28	--	--	--

Wireline Log Inventory (Ingested Curves)

Wellbore	Depth Start (m)	Depth Stop (m)	Typed Curves	Auto-scaled	Ingested
211/23b- 12	151.7904052734375	3371.697509765625	13	0	2026-08-06 11:23:37.972706+00	View Log
211/23b- 12Z	3169.767578125	3761.07958984375	10	0	2026-08-06 11:23:43.943799+00	View Log

Source LAS Manifest (Best Curve per Type)

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211/23b- 12

Curve Type	Best Mnemonic	Source	Depth Start (m)	Depth Stop (m)	Samples
bulk_density	CDEN	Energective CorrectedLOGS	2748.8388	3369.5640000000003	4074
bulk_density	DEN	OGA Batch Unzipped	1623.0600000000002	3368.04	11446
caliper	CALI	OGA Batch Unzipped	2439.6192	3368.04	6088
caliper	CLD	Energective CorrectedLOGS	2746.4004	3362.2488000000003	4042
comp_sonic	DTC	Energective CorrectedLOGS	1646.0724	3356.61	10808
comp_sonic	DT	OGA Batch Unzipped	1628.2416	3365.2968	11318
deep_resistivity	ILD	Energective CorrectedLOGS	1631.5944000000002	2690.4696000000004	6949
deep_resistivity	LLD	Energective CorrectedLOGS	2746.4004	3363.7728	4052
deep_resistivity	RES_DEP	OGA Batch Unzipped	1628.2416	3368.04	11235
density_correction	CDRH	Energective CorrectedLOGS	2746.4004	3369.5640000000003	4090
gamma_ray	GR	OGA Batch Unzipped	175.26000000000002	3368.04	20655
gamma_ray	GRI	Energective CorrectedLOGS	151.7904	3357.0672	21033
med_resistivity	RES_MED	OGA Batch Unzipped	1628.2416	3331.464	11000
med_resistivity	ILM	Energective CorrectedLOGS	1631.5944000000002	2692.2984	6961
micro_resistivity	MSF	Energective CorrectedLOGS	2746.4004	3371.6976	4104
micro_resistivity	RES_MIC	OGA Batch Unzipped	2439.6192	3368.04	6093
neutron_por	CNEU	Energective CorrectedLOGS	2722.1688	3364.0776	4213
pef	CPEF	Energective CorrectedLOGS	2746.4004	3369.1068	4087
shallow_resistivity	RES_SLW	OGA Batch Unzipped	1628.2416	3368.04	11401
shallow_resistivity	LLS	Energective CorrectedLOGS	2746.4004	3364.3824	4056
shallow_resistivity	SFL	Energective CorrectedLOGS	1631.8992	2691.384	6953
sp	SP	Energective CorrectedLOGS	1631.5944000000002	3352.6476000000002	11294
tvdss	SS	Energective CorrectedLOGS	151.7904	3371.6976	21129
vshale	VSH	Energective CorrectedLOGS	1641.6528	3357.0672	11257
vshale	VSGR	Energective CorrectedLOGS	1641.6528	3357.0672	11257

211/23b- 12Z

Curve Type	Best Mnemonic	Source	Depth Start (m)	Depth Stop (m)	Samples
bulk_density	CDEN	Energective CorrectedLOGS	3278.4288	3758.184	3149
caliper	CLD	Energective CorrectedLOGS	3278.4288	3741.1152	3037
comp_sonic	DTC	Energective CorrectedLOGS	3278.4288	3751.1736	3103
deep_resistivity	ILD	Energective CorrectedLOGS	3279.1908000000003	3758.9460000000004	3149
density_correction	CDRH	Energective CorrectedLOGS	3278.4288	3758.0316000000003	3148
gamma_ray	GRI	Energective CorrectedLOGS	3173.5776	3748.2780000000002	3772
gamma_ray	GRLW	Energective CorrectedLOGS	3261.5124	3758.9460000000004	3265
med_resistivity	ILM	Energective CorrectedLOGS	3278.5812	3761.0796	3167
neutron_por	CNEU	Energective CorrectedLOGS	3169.7676	3751.4784	3818
pef	CPEF	Energective CorrectedLOGS	3278.4288	3758.184	3149
tvdss	SS	Energective CorrectedLOGS	3169.6152	3761.232	3883
vshale	VSGR	Energective CorrectedLOGS	3279.3432000000003	3747.516	3073
vshale	VSH	Energective CorrectedLOGS	3279.3432000000003	3747.516	3073

Survey Inventory (Deviation)

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Wellbore	Stations	Max MD (m)	Max TVDSS (m)	Survey File
211/23b- 12	105	3368.040	3340.643	G:\NSTA_BigFiles\OGA_Batch_Unzipped\UK_211\211_23b- 12\WELL_PATH\WDD_QC\211_23b-_12_wdd_WDD_FILE_1923587_DATACO_MAPPED.csv
211/23b- 12Z	0	--	--	--

211/23b- 12

Well Header

Wellbores (2)

Formation Tops (7)

Lithology Intervals

Interpreted Data Inventory (LR / WellStrat)

Hydrocarbon Occurrence (4)

Rock Samples (4)

Wireline Log Inventory (Ingested Curves)

Source LAS Manifest (Best Curve per Type)

Survey Inventory (Deviation)

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