12/23- 1

Decommissioned

Well Header

Well No
12/23- 1
NSTA DEN No
85
Well Name
--
Drill Seq No
1
Quadrant / Block
12 / 23
Surface Location
58.291003, -2.447540
Source Datum
ED50
Subsea Well
No
Platform
--
Slot No
--
Operator
NEO NEXT+ ENERGY E&P UK LIMITED
Original Operator
--
Sub Area Operator
NEO NEXT+ ENERGY E&P UK LIMITED
Licence No
P89
Licence Type
Production
Spud Date
1967-08-22
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (1)

12/23- 1 Original
Current Intent
Exploration
Original Intent
Exploration
Flow Class
Dry Hole
Dev Type
--
Convention
--
Primary Target
--
Well Seq
WB1
Datum Type
Kelly Bushing
Datum Elev (m)
29.870
Ground Elev (m)
--
Water Depth (m)
59.13
TD MD (m)
2644.440
TD TVDSS (m)
2614.570
TD Datum Depth (m)
29.870
TD Datum Type
Kelly Bushing
Spud Date
1967-08-22
TD Reached
1967-09-29
Completion Date
1967-10-06
Release Date
1971-10-06

Formation Tops (27)

Wellbore Formation Era MD (m) TVDSS (m) Provider
12/23- 1 Cromer Knoll Mesozoic 89.000 59.129 Lloyds Register
Lower Cretaceous Undifferentiated Mesozoic 89.000 59.129 Lloyds Register
Captain Sandstone Mesozoic 222.000 192.126 Lloyds Register
Kimmeridge Clay 781.000 751.113 Lloyds Register
Humber Mesozoic 781.000 751.113 Lloyds Register
Burns Sandstone Mesozoic 812.000 782.111 Lloyds Register
Alness Spiculite Mesozoic 870.000 840.107 Lloyds Register
Heather Mesozoic 870.000 840.107 Lloyds Register
Fladen Mesozoic 906.000 876.103 Lloyds Register
Beatrice 906.000 876.103 Lloyds Register
Lower Jurassic Undifferentiated Mesozoic 917.000 887.102 Lloyds Register
Dunrobin Bay Mesozoic 917.000 887.102 Lloyds Register
Stotfield Calcrete Mesozoic 937.000 907.100 Lloyds Register
Heron Palaeozoic 937.000 907.100 Lloyds Register
Lossiehead Mesozoic 955.000 925.098 Lloyds Register
Hopeman Sst 1272.000 1241.982 Lloyds Register
Zechstein Palaeozoic 1360.000 1329.932 Lloyds Register
Bosies Bank Palaeozoic 1360.000 1329.932 Lloyds Register
Kupferschiefer Palaeozoic 1506.000 1475.850 Lloyds Register
Auk 1509.000 1478.848 Lloyds Register
Rotliegend 1509.000 1478.848 Lloyds Register
Carboniferous Undifferentiated Palaeozoic 2201.000 2170.768 Lloyds Register
Carboniferous Palaeozoic 2201.000 2170.768 Lloyds Register
Old Red Palaeozoic 2259.000 2228.763 Lloyds Register
Old Red Sandstone 2259.000 2228.763 Lloyds Register
Basement 2593.000 2562.734 Lloyds Register
Palaeozoic Pre-Cambrian 2593.000 2562.734 Lloyds Register

Lithology Intervals

12/23- 1 Curve: SANDCOUNT 132 intervals  ·  MD 131.521 – 2288.286 m G:/NSTA_BigFiles/NSTA_Packages/Lloyds_Register/NSTA Centr...
Sandstone (85)
Limestone (47)

Interpreted Data Inventory (LR / WellStrat)

Open Interpreted Data Log
Wellbore Groups Formations Members Strat Intervals Tops HC Occ Core Cuttings DSTs
12/23- 1 10 14 3 18 27 8 5 1 1 View

Hydrocarbon Occurrence (3)

Wellbore Category Code Formation / Litho Top MD (m) Base MD (m) Notes
12/23- 1 Oil shows OS * 524.256 -- 159 m thick
12/23- 1 Oil shows OS * 683.3616000000001 -- 98 m thick
12/23- 1 DST DST 1 -- 683.4 702.6 Label / Lower Cretaceous

Rock Samples (10)

Wellbore Sample Top MD (m) Base MD (m) Key Lab Results Comments Notes
12/23- 1 Cuttings 134.11 2633.47 -- -- .
12/23- 1 Core #1 1406.96 1412.14 φ 11.1% (n=4) · Kh 3.0 mD (n=4) · Kv 0.0 mD (n=1) DOLOMITE .
12/23- 1 ↳ Core Plug #1 1407.566 -- φ 16.0% · Kh 5.8 mD -- --
12/23- 1 ↳ Core Plug #1 1407.643 -- φ 18.6% · Kh 6.0 mD DOLOMITE --
12/23- 1 ↳ Core Plug #1 1408.481 -- φ 6.7% · Kh 0.0 mD -- --
12/23- 1 ↳ Core Plug #1 1408.786 -- φ 3.0% · Kh 0.0 mD · Kv 0.0 mD DOLOMITE --
12/23- 1 Core #2 2251.86 2254.0 -- -- .
12/23- 1 Core #3 2333.24 2335.07 -- -- .
12/23- 1 Core #4 2565.2 2566.42 -- -- .
12/23- 1 Core #5 2636.52 2638.04 -- -- .

Wireline Log Inventory (Ingested Curves)

Wellbore Depth Start (m) Depth Stop (m) Typed Curves Auto-scaled Ingested
12/23- 1 83.6676025390625 2644.44482421875 8 0 2026-08-06 07:41:47.961057+00 View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser
12/23- 1
Curve Type Best Mnemonic Source Depth Start (m) Depth Stop (m) Samples
bulk_density RHOB CGG Digital Well Logs 124.5108 2644.4448 16536
caliper CAL CGG Digital Well Logs 432.35880000000003 2644.4448 14516
caliper CALI CGG Digital Well Logs 124.3584 2644.4448 16537
caliper MCAL CGG Digital Well Logs 432.96840000000003 2644.4448 14512
comp_sonic DT CGG Digital Well Logs 124.3584 2644.1400000000003 16471
deep_resistivity ILD CGG Digital Well Logs 434.64480000000003 1379.6772 6202
deep_resistivity LL7 CGG Digital Well Logs 124.8156 2644.4448 16534
density_correction DRHO CGG Digital Well Logs 124.3584 2644.4448 16537
gamma_ray GR CGG Digital Well Logs 83.66760000000001 2638.0440000000003 16762
micro_resistivity MLL CGG Digital Well Logs 432.81600000000003 1379.5248000000001 6213
sp SP CGG Digital Well Logs 433.12080000000003 2644.4448 14511

Survey Inventory (Deviation)

Open full Survey detail
Wellbore Stations Max MD (m) Max TVDSS (m) Survey File
12/23- 1 16 2644.445 2614.175 D:\BigSpatial\nsta_raw\CGG_Deviation\12-23-1 810bk-CGG_Deviation.xlsx

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