Well Data Manager / Well Summary / 9/23b-A4

9/23b-A4

Present

Well Header

Well No
9/23b-A4
NSTA DEN No
5917
Well Name
--
Drill Seq No
4
Quadrant / Block
9 / 23 b
Surface Location
59.278909, 1.514934
Source Datum
ED50
Subsea Well
Unknown
Platform
A
Slot No
9
Operator
TAQA BRATANI LIMITED
Original Operator
--
Sub Area Operator
TAQA BRATANI LIMITED
Licence No
P478
Licence Type
Production
Spud Date
1996-08-28
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (1)

9/23b-A4 Original
Abandoned Phase 1 View Log Interpreted Data Survey
Current Intent
Development
Original Intent
Development
Flow Class
--
Dev Type
Injector
Convention
--
Primary Target
WC2
Well Seq
WB1
Datum Type
Kelly Bushing
Datum Elev (m)
44.196
Ground Elev (m)
--
Water Depth (m)
109.73
TD MD (m)
2891.942
TD TVDSS (m)
1876.654
TD Datum Depth (m)
44.196
TD Datum Type
Kelly Bushing
Spud Date
1996-08-28
TD Reached
1996-10-03
Completion Date
1996-10-24
Release Date
2000-10-24

Formation Tops (10)

Wellbore Formation Era MD (m) TVDSS (m) Provider
9/23b-A4 Unknown 154.000 -44.096 BGS LithoStrat Upper
Hordaland Cenozoic 258.000 59.874 BGS LithoStrat Upper
Lark Formation Cenozoic 306.000 107.805 BGS LithoStrat Upper
Stronsay Group Cenozoic 945.000 697.048 BGS LithoStrat Upper
Grid Member 1030.000 755.443 BGS LithoStrat Upper
Horda Formation Cenozoic 1437.000 970.669 BGS LithoStrat Upper
Balder Cenozoic 2528.000 1525.785 BGS LithoStrat Upper
Massive Sand Subunit 2619.000 1573.584 BGS LithoStrat Upper
Balder Cenozoic 2783.000 1661.748 BGS LithoStrat Upper
Sele Mesozoic 2837.000 1691.805 BGS LithoStrat Upper

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
9/23b-A4 0 0 0 10 10 0 2 0 0 View

Hydrocarbon Occurrence (2)

Wellbore Category Code Formation / Litho Top MD (m) Base MD (m) Notes
9/23b-A4 Oil shows OS Balder Formation 2527.7064 -- 91 m thick
9/23b-A4 Oil shows OS BAMS 2618.8416 -- 164 m thick

Rock Samples (2)

Wellbore Sample Top MD (m) Base MD (m) Key Lab Results Comments Notes
9/23b-A4 Core #1 2552.7 2567.76 -- -- in as 9/23b-WC2
9/23b-A4 Core #2 2657.55 2675.75 -- -- --

Wireline Log Inventory (Ingested Curves)

Wellbore Depth Start (m) Depth Stop (m) Typed Curves Auto-scaled Ingested
9/23b-A4 31.242000579833984 2878.37890625 10 0 2026-08-06 16:13:40.40041+00 View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser
9/23b-A4
Curve Type Best Mnemonic Source Depth Start (m) Depth Stop (m) Samples
bulk_density DEN OGA Batch Unzipped 813.9684000000001 2860.8528 8465
bulk_density CDEN Energective CorrectedLOGS 813.9684000000001 2859.4812 8446
caliper CALI OGA Batch Unzipped 780.8976 2859.6336 7836
caliper CLD Energective CorrectedLOGS 811.0728 2857.5 7637
comp_sonic DTC Energective CorrectedLOGS 813.9684000000001 2861.6148000000003 8439
deep_resistivity ILD Energective CorrectedLOGS 813.9684000000001 2875.4832 7669
deep_resistivity RES_DEP OGA Batch Unzipped 813.9684000000001 2875.4832 7658
density_correction DENC OGA Batch Unzipped 813.9684000000001 2859.4812 8439
density_correction CDRH Energective CorrectedLOGS 813.9684000000001 2856.5856000000003 8422
gamma_ray GR OGA Batch Unzipped 31.242 2852.166 18511
gamma_ray GRI Energective CorrectedLOGS 31.242 2852.166 18511
gamma_ray GRLW Energective CorrectedLOGS 762.0 2651.6076000000003 12400
med_resistivity ILM Energective CorrectedLOGS 813.9684000000001 2878.3788 7685
med_resistivity RES_MED OGA Batch Unzipped 813.9684000000001 2878.3788 7696
neutron_por CNEU Energective CorrectedLOGS 813.816 2854.1472000000003 8237
neutron_por NEU OGA Batch Unzipped 806.3484000000001 2855.3664000000003 8301
pef CPEF Energective CorrectedLOGS 813.9684000000001 2858.8716 8430
shallow_resistivity RES_SLW OGA Batch Unzipped 1287.018 2651.4552000000003 8954
tvdss SS Energective CorrectedLOGS 31.0896 2878.5312000000004 18685

Survey Inventory (Deviation)

Open full Survey detail
Wellbore Stations Max MD (m) Max TVDSS (m) Survey File
9/23b-A4 362 2891.900 1722.959 G:\NSTA_BigFiles\OGA_Batch_Unzipped\UK_9\9_23b-A4\WELL_PATH\WDD_QC\9_23b-A4_wdd_WDD_FILE_46703259_DATACO_MAPPED.csv

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