21/18- 4Z
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
- 21/18- 4
- Borehole / source record ID
- 21/18- 4Z
- Sector
- Oil and gas
- Derived purpose group
- Appraisal
- Operator in source snapshot
- ENQUEST HEATHER LIMITED
- Recorded spud date
- 1983-04-08
- Recorded completion date
- 1983-04-09
- Latitude / longitude (WGS84)
- 57.471150 / 0.544019
- Source-reported measurements
- 3420.16 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
- 1983-04-09
- Source completion status
- Abandoned Phase 3
- Source wellbore status
- EXTANT
- Source well-origin status
- Decommissioned
- Target field
- KITTIWAKE
- Flow class
- Oil Well
- Source fluid types
- Oil
- Parent well
- 21/18- 4
- Parent-well relationship
- Sidetrack
- Licence number
- P351
- Total-depth licence number
- P351
Company roles reported by source
- Responsible wellbore operatorENQUEST HEATHER LIMITED
- Licence operator at well originENQUEST HEATHER LIMITED
- Licence operator at total depthENQUEST HEATHER LIMITED
| Source-reported measurements | Value | Reference |
|---|---|---|
| TDMDDEPM | 3,420.16 m | Kelly Bushing |
| TDTVDSSM | 3,295.02 m | subsea |
| WATDEP_M | 88.09 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 |
|---|---|---|---|
| 21/18- 4 | 0.00 km | 3,444 m | NSTA — UK offshore wellbore top holes |
| 21/18- 2 | 1.71 km | Not reported / not verified m | NSTA — UK offshore wellbore top holes |
| 21/18- 2A | 1.71 km | 3,255 m | NSTA — UK offshore wellbore top holes |
| 21/18- 2AJ | 1.71 km | 2,137 m | NSTA — UK offshore wellbore top holes |
| KA-16S1 | 2.03 km | 4,161 m | NSTA — UK offshore wellbore top holes |
| KA-16 | 2.03 km | 2,783 m | NSTA — UK offshore wellbore top holes |
| 21/18a-K2 | 2.04 km | 4,617 m | NSTA — UK offshore wellbore top holes |
| 21/18a-K3 | 2.04 km | 3,999 m | NSTA — UK offshore wellbore top holes |
| KA-14 | 2.04 km | 3,814 m | NSTA — UK offshore wellbore top holes |
| 21/18a-K7 | 2.04 km | 3,275 m | NSTA — UK offshore wellbore top holes |
| 21/18a-K6 | 2.04 km | 4,085 m | NSTA — UK offshore wellbore top holes |
| 21/18a-K6Z | 2.04 km | 4,170 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-P003219 | 30.78 km | 51.00 mW/m2 | {"qualityScores":["Ux.Mx.-------"]} |
| R24-P003224 | 33.11 km | 63.00 mW/m2 | {"qualityScores":["Ux.Mx.-------"]} |
| R24-P003230 | 34.40 km | 44.00 mW/m2 | {"qualityScores":["Ux.Mx.-------"]} |
| R24-P003229 | 36.81 km | 58.00 mW/m2 | {"qualityScores":["Ux.Mx.-------"]} |
| R24-P003220 | 38.62 km | 53.00 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.