15/21a-A4

Partial source coverage. Status and company roles are reported by each source, not independently verified as current. Unknown does not mean zero.

Name / source ID: 15/21a-A4
Borehole / source record ID: 15/21a-A4
Sector: Oil and gas
Derived purpose group: Development
Operator in source snapshot: CNOOC PETROLEUM EUROPE LIMITED
Recorded spud date: 1991-05-21
Recorded completion date: 1993-01-06
Latitude / longitude (WGS84): 58.283790 / 0.170465
Source-reported measurements: 4270.25 m MD · Kelly Bushing
Status reported by source: Constructed
Source accessed: 2026-10-02
Source snapshot date: Not reported / not verified
Original coordinate reference system: EPSG:4326 WGS84 service geometry; source TOPHOLEDTM attributes vary
Total depth reached date: 1992-12-22
Source completion status: Completed (Shut In)
Source wellbore status: EXTANT
Source well-origin status: Present
Target field: SCOTT
Flow class: Oil Well
Source fluid types: Oil
Licence number: P218
Total-depth licence number: P218

Company roles reported by source

Responsible wellbore operatorCNOOC PETROLEUM EUROPE LIMITED
Licence operator at well originCNOOC PETROLEUM EUROPE LIMITED
Licence operator at total depthCNOOC PETROLEUM EUROPE LIMITED

Source-reported measurements
Source-reported measurements	Value	Reference
TDMDDEPM	4,270.25 m	Kelly Bushing
TDTVDSSM	3,863.04 m	subsea
WATDEP_M	42.74 m	Not reported / not verified

NSTA — UK offshore wellbore top holes ↗

Source accessed: 2026-10-02

Reuse terms: unconfirmed

Contains information provided by the North Sea Transition Authority and/or other third parties.

ArcGIS item metadata does not specify a reuse licence; public access alone is not a licence.

Open source record ↗

JSON ↗Explore measurements →Data API · Measurements ↗Data API ↗

Nearby wells and heat flow

These tools are descriptive: not forecasts, reserve estimates or investment advice. Source coverage is partial; unknown does not mean zero.

Nearby wells and heat flow
Name	Distance	Source-reported measurements	Source catalogues
15/21a-A3	0.03 km	4,444 m	NSTA — UK offshore wellbore top holes
15/21a-AI	0.04 km	498 m	NSTA — UK offshore wellbore top holes
15/21a-A8	0.05 km	4,493 m	NSTA — UK offshore wellbore top holes
15/21a-A6	0.06 km	4,436 m	NSTA — UK offshore wellbore top holes
15/21a-A9	0.06 km	4,371 m	NSTA — UK offshore wellbore top holes
15/21a-A2	0.06 km	4,311 m	NSTA — UK offshore wellbore top holes
15/21a-A5	0.06 km	4,307 m	NSTA — UK offshore wellbore top holes
15/21a-A1	0.06 km	4,823 m	NSTA — UK offshore wellbore top holes
15/21a-A1Z	0.06 km	4,438 m	NSTA — UK offshore wellbore top holes
15/21a-A7	0.07 km	4,699 m	NSTA — UK offshore wellbore top holes
15/21a- 20	0.58 km	4,095 m	NSTA — UK offshore wellbore top holes
15/21a- 35	0.73 km	4,421 m	NSTA — UK offshore wellbore top holes

Subsurface temperature and heat flow

Compare bottom-hole temperatures with depth and see measured heat flow near wells: context for geothermal reuse.

Subsurface temperature and heat flow
Name	Distance	Subsurface temperature and heat flow	Quality flags
R24-P003214	71.20 km	50.00 mW/m2	{"qualityScores":["Ux.Mx.-------"]}
R24-P003228	72.44 km	54.00 mW/m2	{"qualityScores":["Ux.Mx.-------"]}
R24-P003230	73.74 km	44.00 mW/m2	{"qualityScores":["Ux.Mx.-------"]}
R24-P003224	74.16 km	63.00 mW/m2	{"qualityScores":["Ux.Mx.-------"]}
R24-P003219	74.76 km	51.00 mW/m2	{"qualityScores":["Ux.Mx.-------"]}

IHFC · Global Heat Flow Database, Release 2024 (v. 2026.03) ↗

Source accessed: 2026-10-04T21:47:13.346812+00:00

Reuse terms: CC-BY-4.0

Source terms and attribution ↗

Global Heat Flow Data Assessment Group et al. (2024): The Global Heat Flow Database: Release 2024. V. 2026.03. GFZ Data Services. https://doi.org/10.5880/fidgeo.2024.014 Licensed under CC BY 4.0. Wellficent shows parent-level site values and selected metadata; values are not modified.