Well Data Manager / Well Summary / 23/26a- 12

23/26a- 12

Decommissioned

Well Header

Well No
23/26a- 12
NSTA DEN No
3767
Well Name
--
Drill Seq No
12
Quadrant / Block
23 / 26 a
Surface Location
57.092567, 2.087284
Source Datum
ED50
Subsea Well
No
Platform
--
Slot No
--
Operator
BP EXPLORATION OPERATING COMPANY LIMITED
Original Operator
--
Sub Area Operator
BP EXPLORATION OPERATING COMPANY LIMITED
Licence No
P57
Licence Type
Production
Spud Date
1989-05-04
Source File
nsta_feature_service
Imported
2026-05-22 15:28

Wellbores (2)

23/26a- 12 Original
Abandoned Phase 3 View Log Interpreted Data Survey
Current Intent
Exploration
Original Intent
Exploration
Flow Class
Oil Show
Dev Type
--
Convention
--
Primary Target
R
Well Seq
WB1
Datum Type
Rotary Table
Datum Elev (m)
25.908
Ground Elev (m)
--
Water Depth (m)
85.01
TD MD (m)
2201.500
TD TVDSS (m)
2173.800
TD Datum Depth (m)
25.908
TD Datum Type
Kelly Bushing
Spud Date
1989-05-04
TD Reached
1989-06-01
Completion Date
1989-07-24
Release Date
1993-07-24
23/26a- 12Z Sidetrack Z parent: 23/26a- 12
Abandoned Phase 3 View Log Interpreted Data Survey
Current Intent
Exploration
Original Intent
Exploration
Flow Class
Oil Well
Dev Type
--
Convention
--
Primary Target
R
Well Seq
WB2
Datum Type
Rotary Table
Datum Elev (m)
25.910
Ground Elev (m)
--
Water Depth (m)
85.01
TD MD (m)
2478.000
TD TVDSS (m)
2448.840
TD Datum Depth (m)
25.999
TD Datum Type
Kelly Bushing
Spud Date
1989-06-07
TD Reached
1989-06-20
Completion Date
1989-07-24
Release Date
1993-07-24

Formation Tops (17)

Wellbore Formation Era MD (m) TVDSS (m) Provider
23/26a- 12 Nordland Cenozoic 109.000 83.092 BGS LithoStrat Upper
Nordland Cenozoic 569.000 543.076 BGS LithoStrat Upper
Balder Cenozoic 2146.000 2118.494 BGS LithoStrat Upper
Sele Mesozoic 2162.000 2134.437 BGS LithoStrat Upper
Montrose Mesozoic 2165.000 2137.426 BGS LithoStrat Upper
Tor Mesozoic 2168.000 2140.416 BGS LithoStrat Upper
23/26a- 12Z Balder Cenozoic 2155.000 2127.518 Lloyds Register
Moray Mesozoic 2156.000 2128.514 Lloyds Register
Balder Tuff Cenozoic 2157.000 2129.510 Lloyds Register
Sele Mesozoic 2169.000 2141.458 Lloyds Register
Forties Sandstone Mesozoic 2185.000 2157.388 Lloyds Register
Upper Cretaceous Chalk Mesozoic 2202.000 2174.313 Lloyds Register
Chalk Mesozoic 2202.000 2174.313 Lloyds Register
Cromer Knoll Mesozoic 2382.000 2353.364 Lloyds Register
Lower Cretaceous Undifferentiated Mesozoic 2382.000 2353.364 Lloyds Register
Zechstein Palaeozoic 2434.000 2405.038 Lloyds Register
Shearwater Salt 2434.000 2405.038 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- 12 0 0 0 6 6 0 2 0 0 View
23/26a- 12Z 4 5 2 9 11 2 8 1 5 View

Hydrocarbon Occurrence (9)

Wellbore Category Code Formation / Litho Top MD (m) Base MD (m) Notes
23/26a- 12 Oil shows OS Montrose Group 2165.107176 -- 3 m thick
23/26a- 12 Oil shows OS Tor Formation 2168.106408 -- 33 m thick
23/26a- 12Z DST DST 3 -- 2185.1 2235.1 Label / Forties
23/26a- 12Z DST DST 3 -- 2185.1 2235.1 Not used for labelling, multiple DSTs in same play / Upper Cretaceous
23/26a- 12Z Oil O Montrose Group 2185.5074400000003 -- 16 m thick
23/26a- 12Z Oil O Tor Formation 2201.606976 -- 139 m thick
23/26a- 12Z DST DST 2 -- 2204.9 2235.1 Not used for labelling, multiple DSTs in same play / Upper Cretaceous
23/26a- 12Z DST DST 2A -- 2204.9 2235.1 Label / Upper Cretaceous
23/26a- 12Z DST DST 1 -- 2315.9 2347.9 Not used for labelling, multiple DSTs in same play / Upper Cretaceous

Rock Samples (60)

Wellbore Sample Top MD (m) Base MD (m) Key Lab Results Comments Notes
23/26a- 12 Core #1 2172.98 2183.04 φ 22.0% (n=7) · Kh 0.3 mD (n=3) · So 74.6% (n=6) · Sw 16.2% (n=6) · Density 2.71 (n=7) · FSP 22.2 (n=6) · THE ROBERTSON GROUP PLC CHK, CHK, CHK, SL ARG, W.IND, STYL, W/ FRAC, W/ CMN FRACS.; CHK, CHK, SL ARG, W.IND, STYL, W/ FRAC.; CHK, MOD ARG, W.IND, STYL, FRAC.; CHK, SL ARG, W.IND, CALT CMT IN FRACS, STYL.; CHK, SL ARG, W.IND, DAM.; CHK, SL ARG, W.IND, FRACS CMTD W/ CALT.; CHK, SL ARG, W.IND, STYL.; NO ANALYSIS REQUESTED .
23/26a- 12 ↳ Core Plug #1 2173.0 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Core Plug #1 2173.25 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Plug 3 2173.48 -- φ 24.1% · Kh 0.5 mD · So 81.0% · Sw 14.4% · Density 2.71 · FSP 22.4 · THE ROBERTSON GROUP PLC CHK, SL ARG, W.IND, CALT CMT IN FRACS, STYL. --
23/26a- 12 ↳ Core Plug #1 2173.75 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Core Plug #1 2174.5 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Plug 8 2174.81 -- φ 22.5% · Kh 0.3 mD · So 67.2% · Sw 18.2% · Density 2.71 · FSP 23.1 · THE ROBERTSON GROUP PLC CHK, SL ARG, W.IND, STYL. --
23/26a- 12 ↳ Core Plug #1 2175.0 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Core Plug #1 2176.25 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Plug 15 2176.39 -- φ 23.3% · So 76.8% · Sw 16.2% · Density 2.71 · FSP 22.6 · THE ROBERTSON GROUP PLC CHK, CHK, SL ARG, W.IND, STYL, W/ FRAC. --
23/26a- 12 ↳ Core Plug #1 2176.75 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Core Plug #1 2177.0 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Plug 18 2177.2 -- φ 25.9% · So 77.0% · Sw 13.3% · Density 2.70 · FSP 24.2 · THE ROBERTSON GROUP PLC CHK, CHK, CHK, SL ARG, W.IND, STYL, W/ FRAC, W/ CMN FRACS. --
23/26a- 12 ↳ Core Plug #1 2177.5 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Core Plug #1 2180.25 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Plug 31 2180.48 -- φ 19.4% · Density 2.70 · THE ROBERTSON GROUP PLC CHK, MOD ARG, W.IND, STYL, FRAC. --
23/26a- 12 ↳ Plug 32 2180.75 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Plug 33 2180.93 -- φ 23.1% · So 74.3% · Sw 18.0% · Density 2.70 · FSP 23.2 · THE ROBERTSON GROUP PLC CHK, SL ARG, W.IND, DAM. --
23/26a- 12 ↳ Plug 39 2182.56 -- φ 15.5% · Kh 0.1 mD · So 71.4% · Sw 17.0% · Density 2.71 · FSP 17.7 · THE ROBERTSON GROUP PLC CHK, SL ARG, W.IND, FRACS CMTD W/ CALT. --
23/26a- 12 ↳ Core Plug #1 2182.75 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Core Plug #1 2183.0 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 Core #2 2182.98 2192.27 φ 22.5% (n=12) · Kh 0.4 mD (n=10) · So 73.2% (n=7) · Sw 18.7% (n=7) · Density 2.71 (n=12) · FSP 23.0 (n=7) · THE ROBERTSON GROUP PLC CHK, CHK, CHK, CHK, CHK, SL ARG, W.IND, SL CALT CMT IN FRACS, W/ STYL, W/ STYL, W/ STYL.; CHK, CHK, CHK, CHK, SL ARG, W.IND, SL CALT CMT IN FRACS, W/ STYL, W/ STYL.; CHK, CHK, CHK, SL ARG, W.IND, CALT CMT IN FRACS, STYL, W/ BIOCL.; CHK, CHK, CHK, SL ARG, W.IND, SL CALT CMT IN FRACS, W/ STYL.; CHK, CHK, SL ARG, W.IND, CALT CMT IN FRACS, STYL, W/ BIOCL.; CHK, CHK, SL ARG, W.IND, FRACS CMTD W/ CALT, W/ STYL.; CHK, CHK, SL ARG, W.IND, SL CALT CMT IN FRACS, W/ STYL.; CHK, SL ARG, W.IND, CALT CMT IN FRACS, STYL.; CHK, SL ARG, W.IND, SL CALT CMT IN FRACS, STYL, ?SL DOL.; CHK, SL ARG, W.IND, SL CALT CMT IN FRACS.; CHK, SL ARG, W.IND, TR CALT CMT IN FRAC.; CHK, SL ARG, W.IND, TR PYR, CALT, CMT IN FRACS.; NO ANALYSIS REQUESTED .
23/26a- 12 ↳ Core Plug #2 2183.0 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Core Plug #2 2183.07 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Core Plug #2 2183.75 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Plug 45 2184.05 -- φ 23.2% · Kh 0.4 mD · So 71.3% · Sw 19.9% · Density 2.70 · FSP 23.8 · THE ROBERTSON GROUP PLC CHK, CHK, SL ARG, W.IND, FRACS CMTD W/ CALT, W/ STYL. --
23/26a- 12 ↳ Plug 46 2184.25 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Plug 47 2184.61 -- φ 22.7% · Density 2.70 · THE ROBERTSON GROUP PLC CHK, SL ARG, W.IND, TR PYR, CALT, CMT IN FRACS. --
23/26a- 12 ↳ Core Plug #2 2184.75 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Core Plug #2 2185.0 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Plug 50 2185.3 -- φ 23.7% · Kh 0.2 mD · So 70.3% · Sw 22.2% · Density 2.71 · FSP 24.4 · THE ROBERTSON GROUP PLC CHK, SL ARG, W.IND, CALT CMT IN FRACS, STYL. --
23/26a- 12 ↳ Plug 51 2185.59 -- φ 23.1% · Kh 0.3 mD · Density 2.71 · THE ROBERTSON GROUP PLC CHK, CHK, SL ARG, W.IND, CALT CMT IN FRACS, STYL, W/ BIOCL. --
23/26a- 12 ↳ Core Plug #2 2185.75 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Core Plug #2 2186.0 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Plug 54 2186.29 -- φ 23.8% · Kh 0.8 mD · Density 2.70 · THE ROBERTSON GROUP PLC CHK, CHK, CHK, SL ARG, W.IND, CALT CMT IN FRACS, STYL, W/ BIOCL. --
23/26a- 12 ↳ Plug 55 2186.65 -- φ 23.2% · So 74.6% · Sw 15.1% · Density 2.71 · FSP 22.7 · THE ROBERTSON GROUP PLC CHK, SL ARG, W.IND, TR CALT CMT IN FRAC. --
23/26a- 12 ↳ Core Plug #2 2186.75 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Core Plug #2 2188.25 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Plug 63 2188.65 -- φ 22.6% · Kh 0.5 mD · So 78.6% · Sw 15.9% · Density 2.72 · FSP 22.8 · THE ROBERTSON GROUP PLC CHK, SL ARG, W.IND, SL CALT CMT IN FRACS, STYL, ?SL DOL. --
23/26a- 12 ↳ Plug 64 2188.75 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Plug 65 2189.1 -- φ 17.6% · Kh 0.1 mD · Density 2.71 · THE ROBERTSON GROUP PLC CHK, SL ARG, W.IND, SL CALT CMT IN FRACS. --
23/26a- 12 ↳ Plug 66 2189.25 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Plug 67 2189.59 -- φ 24.4% · Kh 0.4 mD · So 67.0% · Sw 19.0% · Density 2.70 · FSP 24.9 · THE ROBERTSON GROUP PLC CHK, CHK, SL ARG, W.IND, SL CALT CMT IN FRACS, W/ STYL. --
23/26a- 12 ↳ Plug 68 2189.75 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Plug 69 2190.09 -- φ 20.0% · Kh 0.2 mD · Density 2.71 · THE ROBERTSON GROUP PLC CHK, CHK, CHK, SL ARG, W.IND, SL CALT CMT IN FRACS, W/ STYL. --
23/26a- 12 ↳ Plug 70 2190.25 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Plug 71 2190.57 -- φ 23.8% · Kh 0.5 mD · So 71.5% · Sw 22.5% · Density 2.70 · FSP 22.4 · THE ROBERTSON GROUP PLC CHK, CHK, CHK, CHK, SL ARG, W.IND, SL CALT CMT IN FRACS, W/ STYL, W/ STYL. --
23/26a- 12 ↳ Core Plug #2 2190.75 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Core Plug #2 2191.0 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12 ↳ Plug 74 2191.27 -- φ 21.4% · Kh 0.2 mD · So 78.8% · Sw 16.5% · Density 2.71 · FSP 20.2 · THE ROBERTSON GROUP PLC CHK, CHK, CHK, CHK, CHK, SL ARG, W.IND, SL CALT CMT IN FRACS, W/ STYL, W/ STYL, W/ STYL. --
23/26a- 12 ↳ Core Plug #2 2191.5 -- THE ROBERTSON GROUP PLC NO ANALYSIS REQUESTED --
23/26a- 12Z Cuttings 1540.0 2475.0 -- -- --
23/26a- 12Z Core #2 2173.99 2205.96 -- -- .
23/26a- 12Z Core #3 2205.96 2213.76 -- -- .
23/26a- 12Z Core #4 2213.98 2224.22 -- -- .
23/26a- 12Z Core #5 2224.46 2234.15 -- -- .
23/26a- 12Z Core #6 2234.46 2247.72 -- -- .
23/26a- 12Z Core #7 2247.72 2266.46 -- -- .
23/26a- 12Z Core #8 2265.97 2278.87 -- -- .
23/26a- 12Z Core #9 2279.48 2295.85 -- -- .

Wireline Log Inventory (Ingested Curves)

Wellbore Depth Start (m) Depth Stop (m) Typed Curves Auto-scaled Ingested
23/26a- 12 98.60279846191406 2005.8887939453125 7 0 2026-08-06 12:23:21.105883+00 View Log
23/26a- 12Z 1261.1099853515625 2479.852783203125 9 0 2026-08-06 12:23:22.663139+00 View Log

Source LAS Manifest (Best Curve per Type)

Open full Manifest browser
23/26a- 12
Curve Type Best Mnemonic Source Depth Start (m) Depth Stop (m) Samples
caliper CALS CGG Digital Well Logs 569.3664 1994.3064 9351
comp_sonic DT CGG Digital Well Logs 569.0616 1999.9452 9200
deep_resistivity ILD CGG Digital Well Logs 569.5188 2004.9744 9351
gamma_ray GR CGG Digital Well Logs 98.6028 2001.4692 12487
med_resistivity ILM CGG Digital Well Logs 569.976 2005.8888 9355
shallow_resistivity SFLU CGG Digital Well Logs 569.0616 991.362 2717
sp SP CGG Digital Well Logs 569.0616 991.362 2711
23/26a- 12Z
Curve Type Best Mnemonic Source Depth Start (m) Depth Stop (m) Samples
bulk_density RHOB CGG Digital Well Logs 2165.4516 2479.8528 2064
caliper CALI CGG Digital Well Logs 2165.2992 2479.8528 2065
caliper CALS CGG Digital Well Logs 2165.2992 2479.8528 2065
comp_sonic DT CGG Digital Well Logs 2165.1468 2466.8988 1981
deep_resistivity ILD CGG Digital Well Logs 2166.5184 2479.8528 2057
density_correction DRHO CGG Digital Well Logs 2165.4516 2479.8528 2064
gamma_ray GR CGG Digital Well Logs 1261.11 2470.8612 7939
gamma_ray CGR CGG Digital Well Logs 2148.5352 2470.8612 2116
gamma_ray SGR CGG Digital Well Logs 2148.5352 2470.8612 2116
med_resistivity ILM CGG Digital Well Logs 2166.5184 2479.8528 2057
neutron_por NPHI CGG Digital Well Logs 2165.4516 2474.8236 2031
pef PEF CGG Digital Well Logs 2165.4516 2479.8528 2064
potassium POTA CGG Digital Well Logs 2148.5352 2470.8612 2116
thorium THOR CGG Digital Well Logs 2148.5352 2470.8612 2116
uranium URAN CGG Digital Well Logs 2148.5352 2470.8612 2116

Survey Inventory (Deviation)

Open full Survey detail
Wellbore Stations Max MD (m) Max TVDSS (m) Survey File
23/26a- 12 196 2201.000 2173.299 D:\BigSpatial\nsta_raw\CGG_Deviation\23-26a-12 8206al_CGG-Deviation.xlsx
23/26a- 12Z 239 2478.120 2448.845 D:\BigSpatial\nsta_raw\CGG_Deviation\23-26a-12Z 17169dn_CGG-Deviation.xlsx

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