Well Data Manager / Well Summary / 15/20a- 7

15/20a- 7

Decommissioned

Well Header

Well No

15/20a- 7

NSTA DEN No

4084

Well Name

Drill Seq No

Quadrant / Block

15 / 20 a

Surface Location

58.481387, 0.956736

Source Datum

ED50

Subsea Well

Platform

Slot No

Operator

BRITOIL LIMITED

Original Operator

Sub Area Operator

BRITOIL LIMITED

Licence No

P196

Licence Type

Production

Spud Date

1990-06-10

Source File

nsta_feature_service

Imported

2026-05-22 15:28

Wellbores (1)

15/20a- 7 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)

25.878

Ground Elev (m)

Water Depth (m)

142.95

TD MD (m)

1996.592

TD TVDSS (m)

1996.379

TD Datum Depth (m)

25.878

TD Datum Type

Kelly Bushing

Spud Date

1990-06-10

TD Reached

1990-06-22

Completion Date

1990-06-28

Release Date

1994-06-28

Formation Tops (15)

Wellbore	Formation	Era	MD (m)	TVDSS (m)	Provider
15/20a- 7	Balder	Cenozoic	1795.000	1600.092	Lloyds Register
	Moray	Mesozoic	1795.000	1600.092	Lloyds Register
	Balder Tuff	Cenozoic	1795.000	1600.092	Lloyds Register
	Sele	Mesozoic	1821.000	1626.086	Lloyds Register
	Lista	Mesozoic	1870.000	1675.073	Lloyds Register
	Montrose	Mesozoic	1870.000	1675.073	Lloyds Register
	Andrew Sandstone	Cenozoic	1939.000	1744.055	Lloyds Register
	Maureen	Mesozoic	1943.000	1748.054	Lloyds Register
	Maureen Sandstone	Mesozoic	1966.000	1771.047	Lloyds Register
	Chalk	Mesozoic	1989.000	1794.040	Lloyds Register
	Tor	Mesozoic	1989.000	1794.040	Lloyds Register
	Heather	Mesozoic	1995.000	1800.038	Lloyds Register
	Humber	Mesozoic	1995.000	1800.038	Lloyds Register
	Old Red	Palaeozoic	1997.000	1802.038	Lloyds Register
	Old Red Sandstone		1997.000	1802.038	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
15/20a- 7	5	7	3	11	15	2	2	1	0	View

Hydrocarbon Occurrence (2)

Wellbore	Category	Code	Formation / Litho	Top MD (m)	Base MD (m)	Notes
15/20a- 7	Oil shows	OS	Andrew Sandstone unit	1868.000328	--	83 m thick
15/20a- 7	Oil shows	OS	Maureen Formation	1951.000416	--	38 m thick

Rock Samples (56)

Wellbore	Sample	Top MD (m)	Base MD (m)	Key Lab Results	Comments	Notes
15/20a- 7	Cuttings	764.0	2022.0	--	--	curated April`02 to fill gap
15/20a- 7	Core #1	1938.99	1962.49	ROBERTSON GROUP PLC	SHALE NO ANALYSIS	UKCS 230 .
15/20a- 7	↳ Core Plug #1	1939.0	--	ROBERTSON GROUP PLC	SHALE NO ANALYSIS	--
15/20a- 7	Core #2	1963.6	1978.3	φ 22.8% (n=35) · Kh 141.7 mD (n=27) · Kv 294.5 mD (n=8) · So 15.0% (n=22) · Sw 61.8% (n=22) · Density 2.66 (n=35) · FSP 23.1 (n=22) · ROBERTSON GROUP PLC	FRACTURES NO ANALYSIS; NO PLUG TAKEN; SHALE NO ANALYSIS \| SLEEVED SAMPLE; SST, F, MOD IND, CMN CALC CMT, SL PYR NOD, SL MIC, TR LAM.; SST, F-MED, MOD IND, CMN CALC CMT, SL MIC, W/ SL PYR NOD, W/NO MIC.; SST, F-MED, MOD IND, CMN CALC CMT, SL MIC, W/ TR CARB SL MIC AND TR PYR NOD.; SST, F-MED, MOD IND, CMN CALC CMT, SL MIC.; SST, F-MED, MOD IND, CMN CALC CMT, TR CARB, TR LAM.; SST, F-MED, MOD IND, CMN CALC CMT, W/NO TR CARB OR TR LAM.; SST, MED, MOD IND, CMN CALC CMT, TR PYR NOD.	UKCS 230 see S92946
15/20a- 7	↳ Core Plug #2	1963.75	--	ROBERTSON GROUP PLC	SHALE NO ANALYSIS	--
15/20a- 7	↳ Core Plug #2	1964.5	--	ROBERTSON GROUP PLC	SHALE NO ANALYSIS	--
15/20a- 7	↳ Plug 100	1964.69	--	φ 11.2% · Kh 0.7 mD · So 9.1% · Sw 58.6% · Density 2.66 · FSP 9.7 · ROBERTSON GROUP PLC	SST, F, MOD IND, CMN CALC CMT, SL PYR NOD, SL MIC, TR LAM.	--
15/20a- 7	↳ Plug 101V	1964.89	--	φ 18.6% · Kv 12.0 mD · Density 2.64 · ROBERTSON GROUP PLC	SST, F-MED, MOD IND, CMN CALC CMT, SL MIC.	--
15/20a- 7	↳ Plug 101	1964.97	--	φ 19.3% · Kh 17.7 mD · So 14.1% · Sw 58.1% · Density 2.67 · FSP 23.0 · ROBERTSON GROUP PLC	SST, F-MED, MOD IND, CMN CALC CMT, SL MIC, W/ SL PYR NOD, W/NO MIC.	--
15/20a- 7	↳ Plug 102	1965.25	--	ROBERTSON GROUP PLC	SHALE NO ANALYSIS	--
15/20a- 7	↳ Plug 103	1965.45	--	φ 16.2% · Kh 0.2 mD · Density 2.64 · ROBERTSON GROUP PLC	SST, F-MED, MOD IND, CMN CALC CMT, SL MIC, W/ TR CARB SL MIC AND TR PYR NOD.	--
15/20a- 7	↳ Core Plug #2	1965.75	--	ROBERTSON GROUP PLC	SHALE NO ANALYSIS	--
15/20a- 7	↳ Core Plug #2	1966.75	--	ROBERTSON GROUP PLC	SHALE NO ANALYSIS	--
15/20a- 7	↳ Plug 109	1967.02	--	φ 34.5% · Kh 260.0 mD · So 14.4% · Sw 61.7% · Density 2.67 · FSP 36.6 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 110V	1967.16	--	φ 25.3% · Kv 134.0 mD · Density 2.64 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 110	1967.23	--	φ 22.9% · Kh 131.0 mD · So 17.0% · Sw 56.4% · Density 2.66 · FSP 28.4 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 111	1967.47	--	φ 24.7% · Kh 4.8 mD · So 20.4% · Sw 64.5% · Density 2.66 · FSP 30.6 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 112	1967.77	--	φ 32.1% · Kh 378.0 mD · So 38.7% · Sw 33.3% · Density 2.66 · FSP 20.7 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 113	1968.0	--	ROBERTSON GROUP PLC	SHALE NO ANALYSIS	--
15/20a- 7	↳ Plug 114	1968.33	--	φ 24.2% · Kh 23.2 mD · So 4.0% · Sw 68.8% · Density 2.67 · FSP 20.4 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 115	1968.54	--	φ 23.0% · Kh 9.6 mD · So 26.9% · Sw 60.6% · Density 2.66 · FSP 25.5 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 116	1968.75	--	ROBERTSON GROUP PLC	SHALE NO ANALYSIS	--
15/20a- 7	↳ Plug 117V	1969.06	--	φ 27.0% · Kv 86.3 mD · Density 2.64 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 117	1969.12	--	φ 24.0% · Kh 92.0 mD · So 6.8% · Sw 67.3% · Density 2.66 · FSP 20.5 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 118	1969.39	--	φ 23.0% · Kh 1.2 mD · So 13.7% · Sw 55.9% · Density 2.65 · FSP 17.6 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 119	1969.5	--	ROBERTSON GROUP PLC	SHALE NO ANALYSIS	--
15/20a- 7	↳ Plug 120	1969.81	--	φ 25.6% · Kh 197.0 mD · Density 2.65 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Core Plug #2	1970.0	--	ROBERTSON GROUP PLC	FRACTURES NO ANALYSIS	--
15/20a- 7	↳ Core Plug #2	1970.25	--	ROBERTSON GROUP PLC	FRACTURES NO ANALYSIS	--
15/20a- 7	↳ Plug 123	1970.57	--	φ 23.6% · Kh 7.9 mD · So 7.2% · Sw 59.3% · Density 2.66 · FSP 22.8 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 124V	1970.7	--	φ 25.6% · Kv 57.4 mD · Density 2.65 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 124	1970.75	--	φ 23.9% · Kh 97.5 mD · So 13.0% · Sw 62.6% · Density 2.65 · FSP 22.9 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 125	1971.03	--	φ 24.4% · Kh 75.7 mD · So 10.0% · Sw 66.9% · Density 2.65 · FSP 22.4 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 126	1971.26	--	φ 23.2% · Kh 93.1 mD · So 9.8% · Sw 47.4% · Density 2.65 · FSP 24.1 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 127	1971.5	--	ROBERTSON GROUP PLC	NO PLUG TAKEN	--
15/20a- 7	↳ Plug 128V	1971.7	--	φ 7.9% · Kv 0.2 mD · Density 2.66 · ROBERTSON GROUP PLC	SST, F-MED, MOD IND, CMN CALC CMT, TR CARB, TR LAM.	--
15/20a- 7	↳ Plug 128	1971.75	--	φ 7.3% · Kh 0.0 mD · So 3.1% · Sw 85.9% · Density 2.66 · FSP 6.6 · ROBERTSON GROUP PLC	SST, F-MED, MOD IND, CMN CALC CMT, W/NO TR CARB OR TR LAM.	--
15/20a- 7	↳ Plug 129	1972.0	--	ROBERTSON GROUP PLC	NO PLUG TAKEN	--
15/20a- 7	↳ Plug 130	1972.35	--	φ 28.6% · Kh 395.0 mD · So 0.7% · Sw 86.4% · Density 2.66 · FSP 24.6 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 131	1972.5	--	φ 26.1% · Kh 8.0 mD · Density 2.69 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 132	1972.73	--	φ 22.9% · Kh 10.5 mD · Density 2.71 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 132V	1972.8	--	φ 24.1% · Kv 3.0 mD · Density 2.67 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 133	1973.0	--	ROBERTSON GROUP PLC	FRACTURES NO ANALYSIS	--
15/20a- 7	↳ Plug 134	1973.4	--	φ 22.5% · Kh 84.9 mD · Density 2.64 · ROBERTSON GROUP PLC	SST, MED, MOD IND, CMN CALC CMT, TR PYR NOD.	--
15/20a- 7	↳ Plug 135	1973.5	--	ROBERTSON GROUP PLC	FRACTURES NO ANALYSIS	--
15/20a- 7	↳ Plug 136	1973.75	--	φ 25.2% · Kh 122.0 mD · So 25.7% · Sw 63.9% · Density 2.66 · FSP 30.0 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Core Plug #2	1974.0	--	ROBERTSON GROUP PLC	SHALE NO ANALYSIS	--
15/20a- 7	↳ Core Plug #2	1976.75	--	ROBERTSON GROUP PLC	SHALE NO ANALYSIS	--
15/20a- 7	↳ Plug 149	1977.03	--	φ 12.8% · Kh 0.6 mD · So 4.9% · Sw 76.2% · Density 2.66 · FSP 25.0 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 150V	1977.18	--	φ 25.0% · Kv 1770.0 mD · Density 2.65 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 150	1977.29	--	φ 23.6% · Kh 125.0 mD · So 5.3% · Sw 68.5% · Density 2.66 · FSP 15.9 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 151	1977.5	--	ROBERTSON GROUP PLC	SHALE NO ANALYSIS	--
15/20a- 7	↳ Plug 152	1977.65	--	φ 25.8% · Kh 175.0 mD · So 32.5% · Sw 46.4% · Density 2.65 · FSP 28.8 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 152V	1977.68	--	φ 28.7% · Kv 293.0 mD · Density 2.65 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 153	1977.9	--	φ 15.7% · Kh 34.9 mD · So 32.7% · Sw 45.6% · Density 2.66 · FSP 28.1 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--
15/20a- 7	↳ Plug 154	1978.15	--	φ 27.8% · Kh 1480.0 mD · So 20.8% · Sw 66.0% · Density 2.64 · FSP 23.2 · ROBERTSON GROUP PLC	SLEEVED SAMPLE	--

Wireline Log Inventory (Ingested Curves)

Wellbore	Depth Start (m)	Depth Stop (m)	Typed Curves	Auto-scaled	Ingested
15/20a- 7	137.00759887695312	2025.24365234375	9	0	2026-08-06 08:20:43.352103+00	View Log

Source LAS Manifest (Best Curve per Type)

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15/20a- 7

Curve Type	Best Mnemonic	Source	Depth Start (m)	Depth Stop (m)	Samples
bulk_density	RHOB	CGG Digital Well Logs	1699.26	2025.0912	2139
bulk_density	DEN	OGA Batch Unzipped	1699.1076	2024.7864000000002	2138
cable_tension	TENS	OGA Batch Unzipped	137.0076	2024.7864000000002	12388
caliper	CALI	CGG Digital Well Logs	749.9604	2025.2436	8369
comp_sonic	DT	CGG Digital Well Logs	750.1128	2011.8324	8280
deep_resistivity	IDER	CGG Digital Well Logs	755.4468	2018.538	8289
deep_resistivity	ILD	CGG Digital Well Logs	751.9416	2022.8052	8340
density_correction	DENC	OGA Batch Unzipped	1699.1076	2024.7864000000002	2138
density_correction	DRHO	CGG Digital Well Logs	1699.26	2025.0912	2139
gamma_ray	GRD	CGG Digital Well Logs	1699.4124	2015.0328	2072
gamma_ray	GR	CGG Digital Well Logs	137.0076	2015.3376	12326
med_resistivity	IMER	CGG Digital Well Logs	755.4468	2018.538	8289
med_resistivity	ILM	CGG Digital Well Logs	740.2068	2023.872	8424
neutron_por	NPHI	CGG Digital Well Logs	1699.4124	2019.3	2100
neutron_por	NEU	OGA Batch Unzipped	1699.1076	2024.7864000000002	2138
pef	PEF	OGA Batch Unzipped	1699.1076	2024.7864000000002	2138

Survey Inventory (Deviation)

Open full Survey detail

Wellbore	Stations	Max MD (m)	Max TVDSS (m)	Survey File
15/20a- 7	245	2022.988	1828.019	G:\NSTA_BigFiles\OGA_Batch_Unzipped\UK_15\15_20a- 7\WELL_PATH\WDD_QC\15_20a-_7_wdd_WDD_FILE_46702730_DATACO_MAPPED.csv

15/20a- 7

Well Header

Wellbores (1)

Formation Tops (15)

Lithology Intervals

Interpreted Data Inventory (LR / WellStrat)

Hydrocarbon Occurrence (2)

Rock Samples (56)

Wireline Log Inventory (Ingested Curves)

Source LAS Manifest (Best Curve per Type)

Survey Inventory (Deviation)

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