Well Data Manager / Well Summary / 21/20b- 3

21/20b- 3

Decommissioned

Well Header

Well No
21/20b- 3
NSTA DEN No
2571
Well Name
--
Drill Seq No
3
Quadrant / Block
21 / 20 b
Surface Location
57.467759, 0.809473
Source Datum
ED50
Subsea Well
No
Platform
--
Slot No
--
Operator
ORANJE-NASSAU ENERGIE HANZE (UK) LIMITED
Original Operator
--
Sub Area Operator
ORANJE-NASSAU ENERGIE HANZE (UK) LIMITED
Licence No
P421
Licence Type
Production
Spud Date
1984-12-22
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (1)

21/20b- 3 Original
Abandoned Phase 3 View Log Interpreted Data Survey
Current Intent
Exploration
Original Intent
Exploration
Flow Class
Dry Hole
Dev Type
--
Convention
--
Primary Target
D
Well Seq
WB1
Datum Type
Kelly Bushing
Datum Elev (m)
21.336
Ground Elev (m)
--
Water Depth (m)
93.88
TD MD (m)
4252.570
TD TVDSS (m)
4231.234
TD Datum Depth (m)
21.336
TD Datum Type
Kelly Bushing
Spud Date
1984-12-22
TD Reached
1985-02-28
Completion Date
1985-03-11
Release Date
1989-03-11

Formation Tops (26)

Wellbore Formation Era MD (m) TVDSS (m) Provider
21/20b- 3 Stronsay Cenozoic 2086.000 2064.604 Lloyds Register
Horda Cenozoic 2086.000 2064.604 Lloyds Register
Moray Mesozoic 2331.000 2309.594 Lloyds Register
Balder Cenozoic 2331.000 2309.594 Lloyds Register
Balder Tuff Cenozoic 2331.000 2309.594 Lloyds Register
Sele Mesozoic 2346.000 2324.594 Lloyds Register
Forties Sandstone Mesozoic 2369.000 2347.593 Lloyds Register
Montrose Mesozoic 2593.000 2571.579 Lloyds Register
Lista Mesozoic 2593.000 2571.579 Lloyds Register
Balmoral Sandstone Cenozoic 2643.000 2621.568 Lloyds Register
Maureen Mesozoic 2678.000 2656.556 Lloyds Register
Maureen Sandstone Mesozoic 2678.000 2656.556 Lloyds Register
Ekofisk Mesozoic 2737.000 2715.533 Lloyds Register
Chalk Mesozoic 2737.000 2715.533 Lloyds Register
Upper Cretaceous Chalk Mesozoic 2804.000 2782.503 Lloyds Register
Rodby Mesozoic 3402.000 3379.874 Lloyds Register
Cromer Knoll Mesozoic 3402.000 3379.874 Lloyds Register
Sola 3430.000 3407.816 Lloyds Register
Valhall Mesozoic 3548.000 3525.552 Lloyds Register
Kimmeridge Clay 4000.000 3975.436 Lloyds Register
Humber Mesozoic 4000.000 3975.436 Lloyds Register
Heather Mesozoic 4077.000 4051.891 Lloyds Register
Heron Palaeozoic 4114.000 4088.629 Lloyds Register
Skagerrak Mesozoic 4114.000 4088.629 Lloyds Register
Zechstein Palaeozoic 4245.000 4218.551 Lloyds Register
Turbot Anhydrite Palaeozoic 4245.000 4218.551 Lloyds Register

Lithology Intervals

21/20b- 3 Curve: SANDCOUNT 113 intervals  ·  MD 227.381 – 4231.996 m G:/NSTA_BigFiles/NSTA_Packages/Lloyds_Register/NSTA Centr...
Limestone (67)
Sandstone (46)

Interpreted Data Inventory (LR / WellStrat)

Open Interpreted Data Log
Wellbore Groups Formations Members Strat Intervals Tops HC Occ Core Cuttings DSTs
21/20b- 3 8 14 4 58 26 2 6 1 0 View

Hydrocarbon Occurrence (0)

No hydrocarbon shows or DSTs recorded for this well.

Rock Samples (34)

Wellbore Sample Top MD (m) Base MD (m) Key Lab Results Comments Notes
21/20b- 3 Cuttings 225.55 4251.96 -- -- .
21/20b- 3 Core #1 2371.34 2389.17 CORE LABORATORIES UK LTD. NO ANALYSIS .
21/20b- 3 ↳ Core Plug #1 2372.258 -- CORE LABORATORIES UK LTD. NO ANALYSIS --
21/20b- 3 Core #2 4036.77 4055.06 CORE LABORATORIES UK LTD. NO ANALYSIS JUMBLED .
21/20b- 3 ↳ Core Plug #2 4036.771 -- CORE LABORATORIES UK LTD. NO ANALYSIS --
21/20b- 3 Core #3 4130.04 4140.56 φ 11.1% (n=7) · Kh 0.1 mD (n=6) · Density 2.75 (n=7) · CORE LABORATORIES UK LTD. P SRT SST GRY SLT-PBL SIL CMT CARB PYR FE STN; SLTY CLST GRY/BRN SIL CMT SH PBL PYR DOL; SLTY CLST RD/BRN SIL CMT DOL PYR FE STN FRAC; SST BRN/GRY VFGR SIL CMT DOL PYR CL FE STN; SST BRN/GRY VFGR SIL CMT DOL PYR CL FE STN W QTZ VNS; SST BRN/GRY VFGR SIL CMT DOL PYR CL FE STN W QTZ VNS W SLTY LEN; SST/SLTST YEL/BRN VFGR SIL CMT MIC FE STN FRAC .
21/20b- 3 ↳ Plug 01 4130.741 -- φ 9.2% · Kh 0.0 mD · Density 3.07 · CORE LABORATORIES UK LTD. SLTY CLST RD/BRN SIL CMT DOL PYR FE STN FRAC --
21/20b- 3 ↳ Plug 02 4131.655 -- φ 11.1% · Kh 0.0 mD · Density 2.71 · CORE LABORATORIES UK LTD. SST BRN/GRY VFGR SIL CMT DOL PYR CL FE STN --
21/20b- 3 ↳ Plug 03 4134.063 -- φ 7.2% · Kh 0.1 mD · Density 2.61 · CORE LABORATORIES UK LTD. SST BRN/GRY VFGR SIL CMT DOL PYR CL FE STN W QTZ VNS --
21/20b- 3 ↳ Plug 04 4135.435 -- φ 10.9% · Kh 0.1 mD · Density 2.69 · CORE LABORATORIES UK LTD. SST BRN/GRY VFGR SIL CMT DOL PYR CL FE STN W QTZ VNS W SLTY LEN --
21/20b- 3 ↳ Plug 05 4136.928 -- φ 13.3% · Kh 0.3 mD · Density 2.73 · CORE LABORATORIES UK LTD. P SRT SST GRY SLT-PBL SIL CMT CARB PYR FE STN --
21/20b- 3 ↳ Plug 06 4138.483 -- φ 13.2% · Density 2.75 · CORE LABORATORIES UK LTD. SLTY CLST GRY/BRN SIL CMT SH PBL PYR DOL --
21/20b- 3 ↳ Plug 07 4139.855 -- φ 12.9% · Kh 0.2 mD · Density 2.68 · CORE LABORATORIES UK LTD. SST/SLTST YEL/BRN VFGR SIL CMT MIC FE STN FRAC --
21/20b- 3 Core #4 4142.23 4152.96 φ 12.7% (n=4) · Kh 0.1 mD (n=2) · Density 2.75 (n=4) · CORE LABORATORIES UK LTD. CLST GRY SIL CMT DOL PYR; SLTST BRN SIL CMT CL MIC PYR FE STN; SLTY SST GRY/BRN VFGR SIL CMT CL PYR FE STN; SLTY SST GRY/BRN VFGR SIL CMT CL PYR FE STN W SH PBL .
21/20b- 3 ↳ Plug 08 4142.598 -- φ 13.3% · Density 2.73 · CORE LABORATORIES UK LTD. CLST GRY SIL CMT DOL PYR --
21/20b- 3 ↳ Plug 09 4145.371 -- φ 11.6% · Kh 0.0 mD · Density 2.64 · CORE LABORATORIES UK LTD. SLTY SST GRY/BRN VFGR SIL CMT CL PYR FE STN --
21/20b- 3 ↳ Plug 10 4147.779 -- φ 13.1% · Kh 0.1 mD · Density 2.70 · CORE LABORATORIES UK LTD. SLTY SST GRY/BRN VFGR SIL CMT CL PYR FE STN W SH PBL --
21/20b- 3 ↳ Plug 11 4152.87 -- φ 12.6% · Density 2.93 · CORE LABORATORIES UK LTD. SLTST BRN SIL CMT CL MIC PYR FE STN --
21/20b- 3 Core #5 4154.12 4172.41 φ 14.0% (n=7) · Kh 0.0 mD (n=7) · Density 2.66 (n=7) · CORE LABORATORIES UK LTD. SST BRN/GRY VFGR SIL CMT MIC SLT TR PYR FE STN; SST YEL/GRY VFGR SIL CMT CL TR PYR DOL FE STN .
21/20b- 3 ↳ Plug 12 4154.637 -- φ 12.3% · Kh 0.0 mD · Density 2.65 · CORE LABORATORIES UK LTD. SST BRN/GRY VFGR SIL CMT MIC SLT TR PYR FE STN --
21/20b- 3 ↳ Plug 13 4157.015 -- φ 13.9% · Kh 0.0 mD · Density 2.67 · CORE LABORATORIES UK LTD. SST YEL/GRY VFGR SIL CMT CL TR PYR DOL FE STN --
21/20b- 3 ↳ Plug 14 4158.295 -- φ 14.8% · Kh 0.0 mD · Density 2.67 · CORE LABORATORIES UK LTD. SST YEL/GRY VFGR SIL CMT CL TR PYR DOL FE STN --
21/20b- 3 ↳ Plug 15 4159.88 -- φ 16.6% · Kh 0.1 mD · Density 2.67 · CORE LABORATORIES UK LTD. SST YEL/GRY VFGR SIL CMT CL TR PYR DOL FE STN --
21/20b- 3 ↳ Plug 16 4162.166 -- φ 12.4% · Kh 0.0 mD · Density 2.67 · CORE LABORATORIES UK LTD. SST YEL/GRY VFGR SIL CMT CL TR PYR DOL FE STN --
21/20b- 3 ↳ Plug 17 4167.287 -- φ 14.9% · Kh 0.0 mD · Density 2.66 · CORE LABORATORIES UK LTD. SST YEL/GRY VFGR SIL CMT CL TR PYR DOL FE STN --
21/20b- 3 ↳ Plug 18 4171.554 -- φ 13.3% · Kh 0.0 mD · Density 2.65 · CORE LABORATORIES UK LTD. SST YEL/GRY VFGR SIL CMT CL TR PYR DOL FE STN --
21/20b- 3 Core #6 4172.41 4189.17 φ 13.4% (n=7) · Kh 0.1 mD (n=7) · Density 2.65 (n=7) · CORE LABORATORIES UK LTD. SST BRN/GRY VFGR SIL CMT CL MIC TR PYR FE STN; SST RD/GRY F-VFGR SIL CMT CL MIC CL PBL FE STN; SST RD/GRY FGR SIL CMT CL MIC CARB LAMS FE STN; SST YEL/GRY VFGR SIL CMT CL TR MIC FE SIN FRAC; SST YEL/GRY VFGR SIL CMT CL TR MIC FE SIN FRAC W TR CARB; SST YEL/GRY VFGR SIL CMT MIC FE STN FRAC .
21/20b- 3 ↳ Plug 19 4172.864 -- φ 10.0% · Kh 0.0 mD · Density 2.69 · CORE LABORATORIES UK LTD. SST BRN/GRY VFGR SIL CMT CL MIC TR PYR FE STN --
21/20b- 3 ↳ Plug 20 4175.73 -- φ 16.5% · Kh 0.1 mD · Density 2.66 · CORE LABORATORIES UK LTD. SST YEL/GRY VFGR SIL CMT CL TR MIC FE SIN FRAC --
21/20b- 3 ↳ Plug 21 4178.259 -- φ 10.8% · Kh 0.0 mD · Density 2.64 · CORE LABORATORIES UK LTD. SST YEL/GRY VFGR SIL CMT CL TR MIC FE SIN FRAC --
21/20b- 3 ↳ Plug 22 4180.423 -- φ 13.5% · Kh 0.1 mD · Density 2.62 · CORE LABORATORIES UK LTD. SST YEL/GRY VFGR SIL CMT CL TR MIC FE SIN FRAC W TR CARB --
21/20b- 3 ↳ Plug 23 4183.106 -- φ 8.8% · Kh 0.1 mD · Density 2.63 · CORE LABORATORIES UK LTD. SST RD/GRY F-VFGR SIL CMT CL MIC CL PBL FE STN --
21/20b- 3 ↳ Plug 24 4185.971 -- φ 16.8% · Kh 0.1 mD · Density 2.63 · CORE LABORATORIES UK LTD. SST RD/GRY FGR SIL CMT CL MIC CARB LAMS FE STN --
21/20b- 3 ↳ Plug 25 4187.83 -- φ 17.1% · Kh 0.1 mD · Density 2.65 · CORE LABORATORIES UK LTD. SST YEL/GRY VFGR SIL CMT MIC FE STN FRAC --

Wireline Log Inventory (Ingested Curves)

Wellbore Depth Start (m) Depth Stop (m) Typed Curves Auto-scaled Ingested
21/20b- 3 184.0991973876953 4254.55078125 10 0 2026-08-06 10:18:45.536764+00 View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser
21/20b- 3
Curve Type Best Mnemonic Source Depth Start (m) Depth Stop (m) Samples
bulk_density RHOB CGG Digital Well Logs 2756.154 4254.5508 9833
caliper CALI CGG Digital Well Logs 2752.4964 4243.4256000000005 9784
comp_sonic DT CGG Digital Well Logs 217.77960000000002 4241.7492 26405
deep_resistivity ILD CGG Digital Well Logs 222.50400000000002 4251.5028 26438
density_correction DRHO CGG Digital Well Logs 2756.154 4254.5508 9833
gamma_ray SGR CGG Digital Well Logs 3897.3252 4242.054 2263
gamma_ray CGR CGG Digital Well Logs 3897.3252 4242.054 2263
gamma_ray GR CGG Digital Well Logs 184.2516 4241.9016 26621
neutron_por NPHI CGG Digital Well Logs 2760.8784 4242.2064 9721
pef PEF CGG Digital Well Logs 2768.0412 4242.6636 9677
potassium POTA CGG Digital Well Logs 3897.3252 4242.054 2263
shallow_resistivity SFLU CGG Digital Well Logs 218.38920000000002 941.3748 4745
sp SP CGG Digital Well Logs 184.0992 945.642 4780
thorium THOR CGG Digital Well Logs 3897.3252 4242.054 2263
uranium URAN CGG Digital Well Logs 3897.3252 4242.054 2263

Survey Inventory (Deviation)

Open full Survey detail
Wellbore Stations Max MD (m) Max TVDSS (m) Survey File
21/20b- 3 125 4252.570 4226.058 D:\BigSpatial\nsta_raw\CGG_Deviation\21-20b-3 1700an_CGG-Deviation.xlsx

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