Well Data Manager / Well Summary / 23/21-T4

23/21-T4

Present

Well Header

Well No
23/21-T4
NSTA DEN No
4499
Well Name
--
Drill Seq No
4
Quadrant / Block
23 / 21
Surface Location
57.286905, 2.176629
Source Datum
ED50
Subsea Well
No
Platform
T
Slot No
13
Operator
CHRYSAOR LIMITED
Original Operator
--
Sub Area Operator
CHRYSAOR LIMITED
Licence No
P101
Licence Type
Production
Spud Date
1991-05-03
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (1)

23/21-T4 Original
Plugged Interpreted Data Survey
Current Intent
Development
Original Intent
Development
Flow Class
Gas and Condensate Well
Dev Type
Producer
Convention
--
Primary Target
--
Well Seq
WB1
Datum Type
Kelly Bushing
Datum Elev (m)
27.432
Ground Elev (m)
--
Water Depth (m)
84.43
TD MD (m)
4629.912
TD TVDSS (m)
3091.282
TD Datum Depth (m)
27.432
TD Datum Type
Kelly Bushing
Spud Date
1991-05-03
TD Reached
1991-08-09
Completion Date
1991-09-07
Release Date
1995-09-07

Formation Tops (10)

Wellbore Formation Era MD (m) TVDSS (m) Provider
23/21-T4 Unknown 112.000 84.568 BGS LithoStrat Upper
Unknown 3693.000 3665.568 BGS LithoStrat Upper
Balder Cenozoic 3854.000 3826.568 BGS LithoStrat Upper
Sele Mesozoic 3886.000 3858.568 BGS LithoStrat Upper
Forties Mesozoic 3934.000 3906.568 BGS LithoStrat Upper
Forties Mesozoic 3992.000 3964.568 BGS LithoStrat Upper
Forties Mesozoic 4075.000 4047.568 BGS LithoStrat Upper
Lista Mesozoic 4279.000 4251.568 BGS LithoStrat Upper
Andrew Cenozoic 4291.000 4263.568 BGS LithoStrat Upper
Maureen Mesozoic 4466.000 4438.568 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
23/21-T4 0 0 0 10 10 0 11 1 0 View

Hydrocarbon Occurrence (6)

Wellbore Category Code Formation / Litho Top MD (m) Base MD (m) Notes
23/21-T4 Gas shows GS Balder Formation 3854.1960000000004 -- 31 m thick
23/21-T4 Gas shows GS Forties Sandstone Member 3934.0536 -- 58 m thick
23/21-T4 Gas shows GS Forties Sandstone Member 3991.9656 -- 83 m thick
23/21-T4 Gas shows GS Forties Sandstone Member 4075.1760000000004 -- 204 m thick
23/21-T4 Gas shows GS Lista Formation 4278.7824 -- 12 m thick
23/21-T4 Gas shows GS Andrew Sandstone unit 4291.2792 -- 175 m thick

Rock Samples (12)

Wellbore Sample Top MD (m) Base MD (m) Key Lab Results Comments Notes
23/21-T4 Cuttings 3645.41 4629.91 -- -- .
23/21-T4 Core #1 3913.63 3933.75 -- -- .
23/21-T4 Core #2 3933.75 3961.79 -- -- .
23/21-T4 Core #3 3962.1 3990.44 -- -- .
23/21-T4 Core #4 3990.44 4027.93 -- -- .
23/21-T4 Core #5 4027.93 4065.42 -- -- .
23/21-T4 Core #6 4065.42 4096.21 -- -- .
23/21-T4 Core #7 4097.43 4117.54 -- -- .
23/21-T4 Core #8 4117.54 4140.4 -- -- .
23/21-T4 Core #9 4140.4 4168.75 -- -- .
23/21-T4 Core #10 4168.75 4197.1 -- -- .
23/21-T4 Core #11 4197.1 4250.74 -- -- .

Wireline Log Inventory (Ingested Curves)

No wireline log curves ingested for this well.

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser

No scanned LAS source files matched to this well.

Survey Inventory (Deviation)

Open full Survey detail
Wellbore Stations Max MD (m) Max TVDSS (m) Survey File
23/21-T4 0 -- -- --

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