21/01a- 20

Decommissioned

Well Header

Well No
21/01a- 20
NSTA DEN No
8834
Well Name
--
Drill Seq No
20
Quadrant / Block
21 / 1 a
Surface Location
57.945956, 0.177328
Source Datum
ED50
Subsea Well
Unknown
Platform
--
Slot No
--
Operator
NEO NEXT + ENERGY RESOURCES UK LIMITED
Original Operator
--
Sub Area Operator
NEO NEXT + ENERGY RESOURCES UK LIMITED
Licence No
P241
Licence Type
Production
Spud Date
2003-08-27
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (1)

21/01a- 20 Original
Current Intent
Exploration
Original Intent
Exploration
Flow Class
Oil Well
Dev Type
--
Convention
--
Primary Target
J5
Well Seq
WB1
Datum Type
Rotary Table
Datum Elev (m)
24.994
Ground Elev (m)
--
Water Depth (m)
130.76
TD MD (m)
4491.837
TD TVDSS (m)
4463.086
TD Datum Depth (m)
24.994
TD Datum Type
Rotary Table
Spud Date
2003-08-27
TD Reached
2003-10-09
Completion Date
2015-09-30
Release Date
2019-09-30

Formation Tops (8)

Wellbore Formation Era MD (m) TVDSS (m) Provider
21/01a- 20 Chalk Mesozoic 2466.000 2441.006 Lloyds Register
Cromer Knoll Mesozoic 3239.000 3214.006 Lloyds Register
Rodby Mesozoic 3239.000 3214.006 Lloyds Register
Sola 3352.000 3327.006 Lloyds Register
Valhall Mesozoic 3412.000 3387.006 Lloyds Register
Humber Mesozoic 4174.000 4149.006 Lloyds Register
Kimmeridge Clay 4174.000 4149.006 Lloyds Register
Claymore Sandstone Mesozoic 4270.000 4245.006 Lloyds Register

Lithology Intervals

21/01a- 20 Curve: SANDCOUNT 66 intervals  ·  MD 1690.421 – 4287.164 m G:/NSTA_BigFiles/NSTA_Packages/Lloyds_Register/NSTA Centr...
Sandstone (59)
Limestone (7)

Interpreted Data Inventory (LR / WellStrat)

Open Interpreted Data Log
Wellbore Groups Formations Members Strat Intervals Tops HC Occ Core Cuttings DSTs
21/01a- 20 3 4 1 18 8 1 2 1 1 View

Hydrocarbon Occurrence (2)

Wellbore Category Code Formation / Litho Top MD (m) Base MD (m) Notes
21/01a- 20 DST DST 1 -- 4270.2 4291.0 Label / Upper Jurassic
21/01a- 20 Mixed shows OWGS Burns Sandstone Member 4270.2480000000005 -- 21 m thick

Rock Samples (3)

Wellbore Sample Top MD (m) Base MD (m) Key Lab Results Comments Notes
21/01a- 20 Cuttings 762.0 4491.84 -- -- wet samples in as 21/1a-20 (J5)
21/01a- 20 Core #1 4257.14 4268.11 -- -- in as 21/1a-20 (J5)
21/01a- 20 Core #2 4269.33 4297.89 -- -- --

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
21/01a- 20 0 -- -- --

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