41/25a- 1

Decommissioned

Well Header

Well No
41/25a- 1
NSTA DEN No
234
Well Name
--
Drill Seq No
1
Quadrant / Block
41 / 25 a
Surface Location
54.286449, -0.127320
Source Datum
ED50
Subsea Well
No
Platform
--
Slot No
--
Operator
NEO NEXT+ ENERGY E&P UK LIMITED
Original Operator
--
Sub Area Operator
NEO NEXT+ ENERGY E&P UK LIMITED
Licence No
P39
Licence Type
Production
Spud Date
1969-07-15
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (1)

41/25a- 1 Original
Current Intent
Exploration
Original Intent
Exploration
Flow Class
Gas Well
Dev Type
--
Convention
--
Primary Target
--
Well Seq
WB1
Datum Type
Kelly Bushing
Datum Elev (m)
34.500
Ground Elev (m)
--
Water Depth (m)
53.00
TD MD (m)
1792.000
TD TVDSS (m)
0.000
TD Datum Depth (m)
34.442
TD Datum Type
Kelly Bushing
Spud Date
1969-07-15
TD Reached
1969-09-02
Completion Date
1969-09-23
Release Date
1973-09-23

Formation Tops (19)

Wellbore Formation Era MD (m) TVDSS (m) Provider
41/25a- 1 Lias Mesozoic 87.000 52.500 BGS LithoStrat Upper
Rhaetic Undifferentiated 203.000 168.500 BGS LithoStrat Upper
Haisborough Mesozoic 203.000 168.500 BGS LithoStrat Upper
Keuper Undifferentiated 223.000 188.500 BGS LithoStrat Upper
Bunter Sandstone Mesozoic 641.000 606.500 BGS LithoStrat Upper
Bunter Sandstone Mesozoic 641.000 606.500 BGS LithoStrat Upper
Bunter Shale Mesozoic 759.000 724.500 BGS LithoStrat Upper
Lower Bunter 759.000 724.500 BGS LithoStrat Upper
Upper Evaporite 1091.000 1056.500 BGS LithoStrat Upper
Zechstein Palaeozoic 1091.000 1056.500 BGS LithoStrat Upper
Carnallitic Marls Palaeozoic 1177.000 1142.500 BGS LithoStrat Upper
Middle Evaporite Cenozoic 1215.000 1180.500 BGS LithoStrat Upper
Upper Magnesian Limestone 1258.000 1223.500 BGS LithoStrat Upper
Grauer Salzton Palaeozoic 1302.000 1267.500 BGS LithoStrat Upper
Lower Evaporite 1303.000 1268.500 BGS LithoStrat Upper
Lower Magnesian Limestone Palaeozoic 1647.000 1612.500 BGS LithoStrat Upper
Rotliegendes 1723.000 1688.500 BGS LithoStrat Upper
Rotliegendes 1723.000 1688.500 BGS LithoStrat Upper
Unknown 1751.000 1716.500 BGS LithoStrat Upper

Lithology Intervals

41/25a- 1 Curve: SANDCOUNT 77 intervals  ·  MD 203.454 – 1722.577 m G:/NSTA_BigFiles/NSTA_Packages/Lloyds_Register/LR_SNS/San...
Sand (47)
Anhydrite (16)
Halite (12)
Limestone (2)

Interpreted Data Inventory (LR / WellStrat)

Open Interpreted Data Log
Wellbore Groups Formations Members Strat Intervals Tops HC Occ Core Cuttings DSTs
41/25a- 1 5 1 0 14 19 2 12 1 12 View

Hydrocarbon Occurrence (13)

Wellbore Category Code Formation / Litho Top MD (m) Base MD (m) Notes
41/25a- 1 DST DST 1 -- 1253.0 1271.0 Label / Zechstein
41/25a- 1 DST DST 10 -- 1260.4 1405.7 Not used for labelling, multiple DSTs in same play / Zechstein
41/25a- 1 DST DST 2 -- 1266.4 1304.5 Not used for labelling, multiple DSTs in same play / Zechstein
41/25a- 1 DST DST 3 -- 1266.5 1304.6 Not used for labelling, multiple DSTs in same play / Zechstein
41/25a- 1 DST DST 9 -- 1632.2 1728.3 Not used for labelling, multiple DSTs in same play / Zechstein
41/25a- 1 DST DST 8 -- 1632.2 1728.2 Label / Rotliegend
41/25a- 1 DST DST 8 -- 1632.2 1728.2 Not used for labelling, multiple DSTs in same play / Zechstein
41/25a- 1 DST DST 9 -- 1632.3 1728.3 Not used for labelling, multiple DSTs in same play / Rotliegend
41/25a- 1 DST DST 6 -- 1645.9 1686.5 Not used for labelling, multiple DSTs in same play / Zechstein
41/25a- 1 DST DST 4 -- 1646.8 1666.3 Not used for labelling, multiple DSTs in same play / Zechstein
41/25a- 1 DST DST 5 -- 1646.8 1678.5 Not used for labelling, multiple DSTs in same play / Zechstein
41/25a- 1 Gas G Lower Magnesian Limestone (Durham) [Obsolete: use CDF, RML] 1647.1392 -- 76 m thick
41/25a- 1 DST DST 7 -- 1681.9 1723.3 Not used for labelling, multiple DSTs in same play / Zechstein

Rock Samples (13)

Wellbore Sample Top MD (m) Base MD (m) Key Lab Results Comments Notes
41/25a- 1 Cuttings 118.87 1770.89 -- -- .
41/25a- 1 Core #1 1239.32 1256.69 -- -- .
41/25a- 1 Core #2 1257.0 1270.71 -- -- .
41/25a- 1 Core #3 1271.02 1288.08 -- -- .
41/25a- 1 Core #4 1288.08 1304.54 -- -- .
41/25a- 1 Core #5 1304.54 1322.22 -- -- .
41/25a- 1 Core #6 1650.19 1666.34 -- -- .
41/25a- 1 Core #7 1666.34 1678.53 -- -- .
41/25a- 1 Core #8 1678.53 1686.46 -- -- .
41/25a- 1 Core #9 1686.46 1704.14 -- -- .
41/25a- 1 Core #10 1704.14 1721.82 -- -- .
41/25a- 1 Core #11 1721.82 1739.49 -- -- .
41/25a- 1 Core #12 1773.94 1791.92 -- -- .

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
41/25a- 1 0 -- -- --

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