23/26a- 2

Decommissioned

Well Header

Well No
23/26a- 2
NSTA DEN No
1144
Well Name
--
Drill Seq No
2
Quadrant / Block
23 / 26 a
Surface Location
57.073989, 2.053672
Source Datum
ED50
Subsea Well
No
Platform
--
Slot No
--
Operator
ITHACA ENERGY (UK) LIMITED
Original Operator
--
Sub Area Operator
ITHACA ENERGY (UK) LIMITED
Licence No
P57
Licence Type
Production
Spud Date
1978-01-12
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (4)

23/26a- 2 Original
Current Intent
Exploration
Original Intent
Exploration
Flow Class
Oil Show
Dev Type
--
Convention
--
Primary Target
A
Well Seq
WB1
Datum Type
Kelly Bushing
Datum Elev (m)
27.430
Ground Elev (m)
--
Water Depth (m)
60.66
TD MD (m)
2268.020
TD TVDSS (m)
--
TD Datum Depth (m)
27.432
TD Datum Type
Kelly Bushing
Spud Date
1978-01-12
TD Reached
1978-02-09
Completion Date
1978-02-14
Release Date
1978-02-14
23/26a- 2J Sidetrack J parent: 23/26a- 2
Abandoned Phase 3 Survey
Current Intent
Exploration
Original Intent
Exploration
Flow Class
--
Dev Type
--
Convention
--
Primary Target
--
Well Seq
--
Datum Type
Rotary Table
Datum Elev (m)
27.400
Ground Elev (m)
--
Water Depth (m)
60.66
TD MD (m)
2784.000
TD TVDSS (m)
2756.600
TD Datum Depth (m)
--
TD Datum Type
--
Spud Date
1978-02-14
TD Reached
1978-02-28
Completion Date
1978-03-07
Release Date
1982-03-07
23/26a- 2K Sidetrack K parent: 23/26a- 2
Abandoned Phase 3 Survey
Current Intent
Exploration
Original Intent
Exploration
Flow Class
--
Dev Type
--
Convention
--
Primary Target
--
Well Seq
--
Datum Type
Rotary Table
Datum Elev (m)
27.400
Ground Elev (m)
--
Water Depth (m)
60.66
TD MD (m)
3263.000
TD TVDSS (m)
--
TD Datum Depth (m)
--
TD Datum Type
--
Spud Date
1978-03-07
TD Reached
1978-04-06
Completion Date
1978-04-08
Release Date
1982-04-08
23/26a- 2Z Sidetrack Z parent: 23/26a- 2K
Current Intent
Exploration
Original Intent
Exploration
Flow Class
Gas Show
Dev Type
--
Convention
--
Primary Target
A
Well Seq
WB2
Datum Type
Kelly Bushing
Datum Elev (m)
26.820
Ground Elev (m)
--
Water Depth (m)
60.66
TD MD (m)
5256.000
TD TVDSS (m)
5228.600
TD Datum Depth (m)
27.432
TD Datum Type
Kelly Bushing
Spud Date
1978-10-09
TD Reached
1979-02-10
Completion Date
1979-02-20
Release Date
1983-02-20

Formation Tops (34)

Wellbore Formation Era MD (m) TVDSS (m) Provider
23/26a- 2 Nordland Cenozoic 88.000 60.570 BGS LithoStrat Upper
Nordland Cenozoic 200.000 172.569 BGS LithoStrat Upper
Nordland Cenozoic 570.000 542.563 BGS LithoStrat Upper
Nordland Cenozoic 820.000 792.559 BGS LithoStrat Upper
Nordland Cenozoic 1770.000 1742.314 BGS LithoStrat Upper
Nordland Cenozoic 2240.000 2211.976 BGS LithoStrat Upper
Nordland Cenozoic 2463.000 2239.926 BGS LithoStrat Upper
Balder Cenozoic 2557.000 2239.926 BGS LithoStrat Upper
Sele Mesozoic 2560.000 2239.926 BGS LithoStrat Upper
Undiff. Andrew/Forties Fmn.II 2599.000 2239.926 BGS LithoStrat Upper
Maureen Mesozoic 2703.000 2239.926 BGS LithoStrat Upper
Ekofisk Mesozoic 2705.000 2239.926 BGS LithoStrat Upper
23/26a- 2Z Balder Cenozoic 3161.000 3027.928 Lloyds Register
Moray Mesozoic 3161.000 3027.928 Lloyds Register
Balder Tuff Cenozoic 3164.000 3030.922 Lloyds Register
Sele Mesozoic 3175.000 3041.899 Lloyds Register
Forties Sandstone Mesozoic 3195.000 3061.856 Lloyds Register
Balmoral Sandstone Cenozoic 3326.000 3192.564 Lloyds Register
Montrose Mesozoic 3326.000 3192.564 Lloyds Register
Lista Mesozoic 3326.000 3192.564 Lloyds Register
Maureen Mesozoic 3422.000 3288.325 Lloyds Register
Maureen Sandstone Mesozoic 3422.000 3288.325 Lloyds Register
Ekofisk Mesozoic 3475.000 3341.219 Lloyds Register
Chalk Mesozoic 3476.000 3342.217 Lloyds Register
Upper Cretaceous Chalk Mesozoic 3559.000 3425.067 Lloyds Register
Rodby Mesozoic 4600.000 4458.688 Lloyds Register
Cromer Knoll Mesozoic 4600.000 4458.688 Lloyds Register
Sola 4740.000 4596.410 Lloyds Register
Valhall Mesozoic 4789.000 4644.828 Lloyds Register
Humber Mesozoic 4892.000 4746.812 Lloyds Register
Kimmeridge Clay 4893.000 4747.806 Lloyds Register
Heather Mesozoic 5012.000 4866.440 Lloyds Register
Pentland Mesozoic 5114.000 4968.007 Lloyds Register
Fladen Mesozoic 5114.000 4968.007 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- 2 0 0 0 12 12 0 5 1 0 View
23/26a- 2J 0 0 0 0 0 0 0 0 0
23/26a- 2K 0 0 0 0 0 0 0 0 0
23/26a- 2Z 6 12 4 14 22 7 3 0 0 View

Hydrocarbon Occurrence (2)

Wellbore Category Code Formation / Litho Top MD (m) Base MD (m) Notes
23/26a- 2 Mixed shows OGS UAF1 2599.127136 -- 104 m thick
23/26a- 2 Gas shows GS Maureen Formation 2703.1309920000003 -- 2 m thick

Rock Samples (57)

Wellbore Sample Top MD (m) Base MD (m) Key Lab Results Comments Notes
23/26a- 2 Cuttings 210.01 5254.93 -- -- .
23/26a- 2 Core #1 2614.0 2620.6 Kh 0.6 mD (n=10) · So 4.4% (n=10) · Sw 71.9% (n=10) · Density 2.66 (n=10) · FSP 20.8 (n=10) · CORE LABS -- well re-boxed (originally curated Oct`79)
23/26a- 2 ↳ Plug 1 2614.0 -- Kh 1.0 mD · So 10.1% · Sw 61.2% · Density 2.68 · FSP 23.0 · CORE LABS -- --
23/26a- 2 ↳ Plug 2 2614.2 -- Kh 0.6 mD · So 15.2% · Sw 59.0% · Density 2.67 · FSP 22.0 · CORE LABS -- --
23/26a- 2 ↳ Plug 3 2614.5 -- Kh 0.8 mD · So 3.9% · Sw 65.7% · Density 2.66 · FSP 20.8 · CORE LABS -- --
23/26a- 2 ↳ Plug 4 2614.7 -- Kh 0.8 mD · So 0.0% · Sw 79.5% · Density 2.68 · FSP 21.1 · CORE LABS -- --
23/26a- 2 ↳ Plug 5 2615.0 -- Kh 0.5 mD · So 0.0% · Sw 80.3% · Density 2.66 · FSP 22.8 · CORE LABS -- --
23/26a- 2 ↳ Plug 6 2615.2 -- Kh 0.4 mD · So 0.0% · Sw 80.7% · Density 2.66 · FSP 21.2 · CORE LABS -- --
23/26a- 2 ↳ Plug 7 2615.5 -- Kh 0.7 mD · So 14.7% · Sw 58.0% · Density 2.66 · FSP 20.7 · CORE LABS -- --
23/26a- 2 ↳ Plug 8 2615.7 -- Kh 0.5 mD · So 0.0% · Sw 75.9% · Density 2.66 · FSP 22.1 · CORE LABS -- --
23/26a- 2 ↳ Plug 9 2616.0 -- Kh 0.3 mD · So 0.0% · Sw 76.7% · Density 2.65 · FSP 18.6 · CORE LABS -- --
23/26a- 2 ↳ Plug 18 2618.2 -- Kh 0.1 mD · So 0.0% · Sw 81.9% · Density 2.66 · FSP 15.3 · CORE LABS -- --
23/26a- 2 Core #2 2622.5 2627.0 Kh 0.1 mD (n=1) · So 0.0% (n=1) · Sw 40.3% (n=1) · Density 2.67 (n=1) · FSP 4.3 (n=1) · CORE LABS -- --
23/26a- 2 ↳ Plug 31 2623.2 -- Kh 0.1 mD · So 0.0% · Sw 40.3% · Density 2.67 · FSP 4.3 · CORE LABS -- --
23/26a- 2 Core #3 2627.0 2631.2 Kh 1.1 mD (n=8) · So 7.1% (n=8) · Sw 64.3% (n=8) · Density 2.67 (n=8) · FSP 18.8 (n=8) · CORE LABS -- --
23/26a- 2 ↳ Plug 52 2628.5 -- Kh 1.1 mD · So 9.3% · Sw 64.3% · Density 2.71 · FSP 22.3 · CORE LABS -- --
23/26a- 2 ↳ Plug 53 2628.7 -- Kh 0.4 mD · So 0.0% · Sw 77.7% · Density 2.66 · FSP 19.9 · CORE LABS -- --
23/26a- 2 ↳ Plug 54 2629.0 -- Kh 0.5 mD · So 3.1% · Sw 78.1% · Density 2.67 · FSP 18.4 · CORE LABS -- --
23/26a- 2 ↳ Plug 55 2629.2 -- Kh 0.5 mD · So 0.0% · Sw 72.5% · Density 2.65 · FSP 22.3 · CORE LABS -- --
23/26a- 2 ↳ Plug 56 2629.5 -- Kh 0.5 mD · So 0.0% · Sw 68.4% · Density 2.65 · FSP 19.0 · CORE LABS -- --
23/26a- 2 ↳ Plug 57 2629.7 -- Kh 0.2 mD · So 5.8% · Sw 66.3% · Density 2.66 · FSP 16.4 · CORE LABS -- --
23/26a- 2 ↳ Plug 60 2630.5 -- Kh 3.0 mD · So 20.4% · Sw 45.6% · Density 2.67 · FSP 16.4 · CORE LABS -- --
23/26a- 2 ↳ Plug 61 2630.7 -- Kh 2.9 mD · So 18.5% · Sw 41.9% · Density 2.69 · FSP 15.9 · CORE LABS -- --
23/26a- 2 Core #4 2633.3 2642.0 Kh 0.6 mD (n=25) · So 11.9% (n=25) · Sw 59.0% (n=25) · Density 2.68 (n=25) · FSP 19.8 (n=25) · CORE LABS -- --
23/26a- 2 ↳ Plug 64 2633.5 -- Kh 0.4 mD · So 15.6% · Sw 56.5% · Density 2.71 · FSP 16.6 · CORE LABS -- --
23/26a- 2 ↳ Plug 65 2633.7 -- Kh 0.7 mD · So 12.0% · Sw 54.5% · Density 2.68 · FSP 17.5 · CORE LABS -- --
23/26a- 2 ↳ Plug 66 2634.0 -- Kh 0.8 mD · So 15.0% · Sw 53.5% · Density 2.67 · FSP 20.2 · CORE LABS -- --
23/26a- 2 ↳ Plug 67 2634.2 -- Kh 0.8 mD · So 14.8% · Sw 56.3% · Density 2.67 · FSP 20.7 · CORE LABS -- --
23/26a- 2 ↳ Plug 68 2634.5 -- Kh 0.8 mD · So 3.5% · Sw 56.1% · Density 2.67 · FSP 18.4 · CORE LABS -- --
23/26a- 2 ↳ Plug 69 2634.7 -- Kh 0.8 mD · So 15.4% · Sw 52.8% · Density 2.66 · FSP 20.2 · CORE LABS -- --
23/26a- 2 ↳ Plug 70 2635.0 -- Kh 0.5 mD · So 15.8% · Sw 54.2% · Density 2.69 · FSP 19.4 · CORE LABS -- --
23/26a- 2 ↳ Plug 71 2635.2 -- Kh 0.7 mD · So 14.2% · Sw 58.7% · Density 2.68 · FSP 21.3 · CORE LABS -- --
23/26a- 2 ↳ Plug 72 2635.5 -- Kh 0.4 mD · So 13.0% · Sw 64.8% · Density 2.66 · FSP 24.5 · CORE LABS -- --
23/26a- 2 ↳ Plug 73 2635.7 -- Kh 2.1 mD · So 12.0% · Sw 63.7% · Density 2.66 · FSP 24.8 · CORE LABS -- --
23/26a- 2 ↳ Plug 74 2636.0 -- Kh 0.1 mD · So 11.8% · Sw 65.8% · Density 2.67 · FSP 24.2 · CORE LABS -- --
23/26a- 2 ↳ Plug 75 2636.2 -- Kh 0.3 mD · So 11.0% · Sw 67.0% · Density 2.66 · FSP 25.0 · CORE LABS -- --
23/26a- 2 ↳ Plug 76 2636.5 -- Kh 0.3 mD · So 14.1% · Sw 55.2% · Density 2.67 · FSP 18.1 · CORE LABS -- --
23/26a- 2 ↳ Plug 77 2636.7 -- Kh 0.3 mD · So 14.0% · Sw 54.7% · Density 2.69 · FSP 16.8 · CORE LABS -- --
23/26a- 2 ↳ Plug 78 2637.0 -- Kh 0.2 mD · So 11.7% · Sw 25.8% · Density 2.69 · FSP 13.8 · CORE LABS -- --
23/26a- 2 ↳ Plug 79 2637.2 -- Kh 0.2 mD · So 13.3% · Sw 55.6% · Density 2.68 · FSP 17.4 · CORE LABS -- --
23/26a- 2 ↳ Plug 81 2637.7 -- Kh 0.0 mD · So 0.0% · Sw 43.1% · Density 2.68 · FSP 6.6 · CORE LABS -- --
23/26a- 2 ↳ Plug 82 2638.0 -- Kh 0.3 mD · So 13.0% · Sw 56.5% · Density 2.67 · FSP 18.1 · CORE LABS -- --
23/26a- 2 ↳ Plug 83 2638.2 -- Kh 0.1 mD · So 10.0% · Sw 74.3% · Density 2.66 · FSP 21.1 · CORE LABS -- --
23/26a- 2 ↳ Plug 84 2638.5 -- Kh 0.4 mD · So 12.4% · Sw 64.5% · Density 2.70 · FSP 22.6 · CORE LABS -- --
23/26a- 2 ↳ Plug 85 2638.7 -- Kh 1.2 mD · So 13.3% · Sw 60.5% · Density 2.69 · FSP 18.7 · CORE LABS -- --
23/26a- 2 ↳ Plug 86 2639.0 -- Kh 2.1 mD · So 12.4% · Sw 67.6% · Density 2.68 · FSP 24.6 · CORE LABS -- --
23/26a- 2 ↳ Plug 87 2639.2 -- Kh 0.6 mD · So 12.6% · Sw 73.8% · Density 2.67 · FSP 20.9 · CORE LABS -- --
23/26a- 2 ↳ Plug 91 2640.2 -- Kh 0.1 mD · So 13.6% · Sw 57.1% · Density 2.66 · FSP 20.7 · CORE LABS -- --
23/26a- 2 ↳ Plug 94 2641.0 -- Kh 0.1 mD · So 2.5% · Sw 83.1% · Density 2.67 · FSP 23.2 · CORE LABS -- --
23/26a- 2 Core #5 2642.0 2650.5 Kh 0.9 mD (n=4) · So 5.6% (n=4) · Sw 78.0% (n=4) · Density 2.66 (n=4) · FSP 24.7 (n=4) · CORE LABS -- --
23/26a- 2 ↳ Plug 101 2642.7 -- Kh 1.2 mD · So 8.9% · Sw 67.4% · Density 2.66 · FSP 23.2 · CORE LABS -- --
23/26a- 2 ↳ Plug 102 2643.0 -- Kh 0.9 mD · So 7.5% · Sw 78.4% · Density 2.67 · FSP 25.2 · CORE LABS -- --
23/26a- 2 ↳ Plug 103 2643.2 -- Kh 0.8 mD · So 2.1% · Sw 81.4% · Density 2.66 · FSP 26.6 · CORE LABS -- --
23/26a- 2 ↳ Plug 104 2643.5 -- Kh 0.6 mD · So 4.0% · Sw 84.8% · Density 2.66 · FSP 23.7 · CORE LABS -- --
23/26a- 2Z Core #6 3236.75 3246.0 -- -- for cores 1-5 see 23/26a-2 (S143112-20)
23/26a- 2Z Core #7 3246.2 3252.56 -- -- --
23/26a- 2Z Core #8 5022.0 5151.1 -- -- junk core sample (one bag)

Wireline Log Inventory (Ingested Curves)

Wellbore Depth Start (m) Depth Stop (m) Typed Curves Auto-scaled Ingested
23/26a- 2 651.0527954101562 5252.58642578125 8 0 2026-08-06 12:24:38.599475+00 View Log
23/26a- 2Z 1520.3424072265625 5253.990234375 10 0 2026-08-06 12:26:24.759093+00 View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser
23/26a- 2
Curve Type Best Mnemonic Source Depth Start (m) Depth Stop (m) Samples
bulk_density DENS LR Petrophysical Mid Jur/CNS 5079.3306 5252.5866 1138
caliper CALI LR Petrophysical Mid Jur/CNS 5079.3306 5252.5866 1138
comp_sonic DT CGG Digital Well Logs 651.0528 2559.558 12524
comp_sonic DTC LR Petrophysical Mid Jur/CNS 5079.3306 5252.5866 1138
deep_resistivity RDEP LR Petrophysical Mid Jur/CNS 5079.3306 5252.5866 1138
deep_resistivity ILD CGG Digital Well Logs 651.0528 2569.464 12589
gamma_ray GR LR Petrophysical Mid Jur/CNS 5079.3306 5252.5866 1138
neutron_por NEUT LR Petrophysical Mid Jur/CNS 5079.3306 5252.5866 1138
shallow_resistivity SFLU CGG Digital Well Logs 651.0528 2570.0736 12593
sp SP CGG Digital Well Logs 651.0528 2569.3116 12588
23/26a- 2Z
Curve Type Best Mnemonic Source Depth Start (m) Depth Stop (m) Samples
bulk_density RHOB CGG Digital Well Logs 2851.0992 5252.7708 6082
caliper CALI CGG Digital Well Logs 2850.0324 5253.6852 6074
caliper CALS CGG Digital Well Logs 2850.0324 3255.1116 2659
comp_sonic DT CGG Digital Well Logs 1592.7324 5242.8648 23922
deep_resistivity LLD CGG Digital Well Logs 2850.0324 3255.1116 2659
deep_resistivity ILD CGG Digital Well Logs 1592.7324 5251.704 14214
density_correction DRHO CGG Digital Well Logs 2850.0324 5253.228 6077
gamma_ray GRL CGG Digital Well Logs 2850.0324 3255.1116 2659
gamma_ray GR CGG Digital Well Logs 1520.3424 5246.0652 24448
micro_resistivity MSFL CGG Digital Well Logs 2850.0324 3255.1116 2659
neutron_por NPHI CGG Digital Well Logs 2850.0324 5248.3512 6036
shallow_resistivity LLS CGG Digital Well Logs 2850.0324 3255.1116 2659
shallow_resistivity SFLU CGG Digital Well Logs 1592.4276 3238.0428 10799
sp SP CGG Digital Well Logs 1592.4276 5253.99 14239

Survey Inventory (Deviation)

Open full Survey detail
Wellbore Stations Max MD (m) Max TVDSS (m) Survey File
23/26a- 2 53 2267.970 2239.926 D:\BigSpatial\nsta_raw\CGG_Deviation\23-26a-2 10200bb_CGG-Deviation.xlsx
23/26a- 2J 0 -- -- --
23/26a- 2K 0 -- -- --
23/26a- 2Z 151 5255.998 5109.031 D:\BigSpatial\nsta_raw\CGG_Deviation\23-26a-2Z 10254x_CGG-Deviation.xlsx

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