Well Data Manager / Well Summary / 23/26a- 21

23/26a- 21

Decommissioned

Well Header

Well No
23/26a- 21
NSTA DEN No
6282
Well Name
--
Drill Seq No
21
Quadrant / Block
23 / 26 a
Surface Location
57.032467, 2.168363
Source Datum
ED50
Subsea Well
Unknown
Platform
--
Slot No
--
Operator
NEO NEXT+ ENERGY E&P NORTH SEA UK LIMITED
Original Operator
--
Sub Area Operator
NEO NEXT+ ENERGY E&P NORTH SEA UK LIMITED
Licence No
P51
Licence Type
Production
Spud Date
1997-12-28
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (1)

23/26a- 21 Original
Abandoned Phase 3 View Log Interpreted Data Survey
Current Intent
Exploration
Original Intent
Exploration
Flow Class
Dry Hole
Dev Type
--
Convention
--
Primary Target
AA
Well Seq
WB1
Datum Type
Rotary Table
Datum Elev (m)
26.370
Ground Elev (m)
--
Water Depth (m)
89.00
TD MD (m)
5145.630
TD TVDSS (m)
5117.290
TD Datum Depth (m)
25.908
TD Datum Type
Kelly Bushing
Spud Date
1997-12-28
TD Reached
1998-03-06
Completion Date
1998-03-16
Release Date
2002-03-16

Formation Tops (28)

Wellbore Formation Era MD (m) TVDSS (m) Provider
23/26a- 21 Horda Cenozoic 2847.000 2820.017 Lloyds Register
Stronsay Cenozoic 2847.000 2820.017 Lloyds Register
Balder Cenozoic 3096.000 3068.935 Lloyds Register
Balder Tuff Cenozoic 3096.000 3068.935 Lloyds Register
Moray Mesozoic 3096.000 3068.935 Lloyds Register
Sele Mesozoic 3109.000 3081.933 Lloyds Register
Forties Sandstone Mesozoic 3133.000 3105.931 Lloyds Register
Lista Mesozoic 3292.000 3264.916 Lloyds Register
Montrose Mesozoic 3292.000 3264.916 Lloyds Register
Balmoral Sandstone Cenozoic 3315.000 3287.915 Lloyds Register
Maureen Mesozoic 3382.000 3354.912 Lloyds Register
Maureen Reworked Unit Mesozoic 3406.000 3378.911 Lloyds Register
Ekofisk Mesozoic 3434.000 3406.908 Lloyds Register
Chalk Mesozoic 3434.000 3406.908 Lloyds Register
Tor Mesozoic 3530.000 3502.899 Lloyds Register
Mackerel Mesozoic 4040.000 4012.876 Lloyds Register
Herring Mesozoic 4575.000 4547.770 Lloyds Register
Hidra Mesozoic 4640.000 4612.728 Lloyds Register
Rodby Mesozoic 4654.000 4626.718 Lloyds Register
Cromer Knoll Mesozoic 4654.000 4626.718 Lloyds Register
Sola 4759.000 4731.582 Lloyds Register
Valhall Mesozoic 4767.000 4739.567 Lloyds Register
Humber Mesozoic 4859.000 4831.357 Lloyds Register
Heather Mesozoic 4859.000 4831.357 Lloyds Register
Freshney Sandstone Mesozoic 4868.000 4840.334 Lloyds Register
Freshney Sandstone Mesozoic 4921.000 4893.200 Lloyds Register
Pentland Mesozoic 5083.000 5054.986 Lloyds Register
Fladen Mesozoic 5083.000 5054.986 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
23/26a- 21 7 15 6 35 28 2 0 1 0 View

Hydrocarbon Occurrence (0)

No hydrocarbon shows or DSTs recorded for this well.

Rock Samples (1)

Wellbore Sample Top MD (m) Base MD (m) Key Lab Results Comments Notes
23/26a- 21 Cuttings 975.36 5145.02 -- -- --

Wireline Log Inventory (Ingested Curves)

Wellbore Depth Start (m) Depth Stop (m) Typed Curves Auto-scaled Ingested
23/26a- 21 82.90560150146484 5158.13037109375 10 0 2026-08-06 18:03:37.244553+00 View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser
23/26a- 21
Curve Type Best Mnemonic Source Depth Start (m) Depth Stop (m) Samples
bulk_density RHOB CGG Digital Well Logs 941.832 5158.1304 27541
caliper CALI CGG Digital Well Logs 941.832 5158.1304 27555
comp_sonic DTLF CGG Digital Well Logs 941.832 4701.8448 24673
comp_sonic DT CGG Digital Well Logs 941.832 4701.8448 24673
comp_sonic DT4P CGG Digital Well Logs 4601.2608 5139.6900000000005 3534
comp_sonic DTC CGG Digital Well Logs 941.832 5139.6900000000005 27546
comp_sonic DTCO CGG Digital Well Logs 4601.2608 5139.6900000000005 3534
deep_resistivity AT90 CGG Digital Well Logs 4701.8448 5154.3204000000005 2970
deep_resistivity RESD CGG Digital Well Logs 943.0512 5154.3204000000005 27634
deep_resistivity IDPH CGG Digital Well Logs 943.0512 4715.8656 24757
density_correction DRHO CGG Digital Well Logs 941.832 5158.1304 24760
gamma_ray HCGR CGG Digital Well Logs 4621.8348000000005 5145.4812 3437
gamma_ray GR CGG Digital Well Logs 82.9056 5145.1764 33218
gamma_ray HSGR CGG Digital Well Logs 4621.8348000000005 5145.4812 3437
med_resistivity AT60 CGG Digital Well Logs 4701.8448 5154.3204000000005 2970
med_resistivity ATR CGG Digital Well Logs 3574.6944000000003 4710.0744 7451
med_resistivity RESM CGG Digital Well Logs 943.0512 5154.3204000000005 27634
med_resistivity AT30 CGG Digital Well Logs 4701.8448 5154.3204000000005 2970
med_resistivity AT20 CGG Digital Well Logs 4701.8448 5154.3204000000005 2970
med_resistivity IMPH CGG Digital Well Logs 943.0512 4715.8656 24757
med_resistivity PSR CGG Digital Well Logs 3574.6944000000003 4710.0744 7451
neutron_por NPHI CGG Digital Well Logs 3572.8656 5152.4916 10366
pef PEF CGG Digital Well Logs 951.5856 3563.7216000000003 17141
shallow_resistivity AT10 CGG Digital Well Logs 4701.8448 5154.3204000000005 2970
shear_sonic DT4S CGG Digital Well Logs 4601.2608 5139.6900000000005 3532
shear_sonic DTSM CGG Digital Well Logs 4601.2608 5139.6900000000005 3532

Survey Inventory (Deviation)

Open full Survey detail
Wellbore Stations Max MD (m) Max TVDSS (m) Survey File
23/26a- 21 494 5145.634 5117.550 D:\BigSpatial\nsta_raw\CGG_Deviation\23-26a-21 26648cg_CGG-Deviation.xlsx

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