21/20b- 4Y
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
- 21/20b- 4
- Borehole / source record ID
- 21/20b- 4Y
- Sector
- Oil and gas
- Derived purpose group
- Exploration
- Operator in source snapshot
- SPIRIT ENERGY NORTH SEA OIL LIMITED
- Recorded spud date
- 1990-09-03
- Recorded completion date
- 1991-02-14
- Latitude / longitude (WGS84)
- 57.402044 / 0.878133
- Source-reported measurements
- 4339.74 m MD · Kelly Bushing
- Status reported by source
- Decomissioned
- 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
- 1991-01-12
- Source completion status
- Abandoned Phase 3
- Source wellbore status
- EXTANT
- Source well-origin status
- Decommissioned
- Flow class
- Oil Well
- Source fluid types
- Oil
- Parent well
- 21/20b- 4Z
- Parent-well relationship
- Sidetrack
- Licence number
- P421
- Total-depth licence number
- P421
Company roles reported by source
- Responsible wellbore operatorSPIRIT ENERGY NORTH SEA OIL LIMITED
- Licence operator at well originSPIRIT ENERGY NORTH SEA OIL LIMITED
- Licence operator at total depthSPIRIT ENERGY NORTH SEA OIL LIMITED
| Source-reported measurements | Value | Reference |
|---|---|---|
| TDMDDEPM | 4,339.74 m | Kelly Bushing |
| TDTVDSSM | 4,313.83 m | subsea |
| WATDEP_M | 119.48 m | Not reported / not verified |
NSTA — UK offshore wellbore top holes ↗
Source accessed:
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.
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.
| Name | Distance | Source-reported measurements | Source catalogues |
|---|---|---|---|
| 21/20b- 4 | 0.00 km | 2,911 m | NSTA — UK offshore wellbore top holes |
| 21/20b- 4Z | 0.00 km | 3,741 m | NSTA — UK offshore wellbore top holes |
| 21/20d- 8 | 3.14 km | 4,606 m | NSTA — UK offshore wellbore top holes |
| 21/20b- 6 | 3.83 km | 4,557 m | NSTA — UK offshore wellbore top holes |
| 21/20b- 6Z | 3.83 km | 4,557 m | NSTA — UK offshore wellbore top holes |
| 21/20a- 5 | 4.59 km | 4,634 m | NSTA — UK offshore wellbore top holes |
| 21/20a- 2 | 5.21 km | 3,986 m | NSTA — UK offshore wellbore top holes |
| 21/20a-WI | 5.49 km | 3,976 m | NSTA — UK offshore wellbore top holes |
| 21/20a-P1 | 5.52 km | 3,883 m | NSTA — UK offshore wellbore top holes |
| 21/19- 4 | 6.25 km | 4,176 m | NSTA — UK offshore wellbore top holes |
| 21/19- 3 | 6.43 km | 4,058 m | NSTA — UK offshore wellbore top holes |
| 21/19- 5 | 6.82 km | 3,999 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.
| Name | Distance | Subsurface temperature and heat flow | Quality flags |
|---|---|---|---|
| R24-P003236 | 22.49 km | 53.00 mW/m2 | {"qualityScores":["Ux.Mx.-------"]} |
| R24-P003229 | 30.47 km | 58.00 mW/m2 | {"qualityScores":["Ux.Mx.-------"]} |
| R24-P003234 | 31.85 km | 66.00 mW/m2 | {"qualityScores":["Ux.Mx.-------"]} |
| R24-P003235 | 32.21 km | 61.00 mW/m2 | {"qualityScores":["Ux.Mx.-------"]} |
| R24-P003225 | 32.71 km | 64.00 mW/m2 | {"qualityScores":["Ux.Mx.-------"]} |
IHFC · Global Heat Flow Database, Release 2024 (v. 2026.03) ↗
Source accessed:
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.