31/5-4 S

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: 31/5-4
Borehole / source record ID: 1669
Sector: Oil and gas
Derived purpose group: Appraisal
Operator in source snapshot: Norsk Hydro Produksjon AS
Recorded spud date: 1990-09-13
Recorded completion date: 1990-10-10
Latitude / longitude (WGS84): 60.720660 / 3.560268
Source-reported measurements: 1909 m MD · RKB
Status reported by source: P&A
Source accessed: 2026-10-02
Source snapshot date: Not reported / not verified
Original coordinate reference system: ED50 / service geometry EPSG:4326
Drilling facility reported by source: TRANSOCEAN 8

Company roles reported by source

Drilling operatorNorsk Hydro Produksjon AS Open source record ↗

Source-reported measurements
Source-reported measurements	Value	Reference
wlbTotalDepth	1,909.00 m	RKB
wlbFinalVerticalDepth	1,706.00 m	RKB
wlbWaterDepth	316.00 m	Not reported / not verified
wlbBottomHoleTemperature	57.00 °C	Not reported / not verified

Norwegian Offshore Directorate — Wellbores ↗

Source accessed: 2026-10-02

Reuse terms: review-source-terms

Source terms and attribution ↗

Norwegian Offshore Directorate (NOD/SODIR), NLOD 2.0. Normalized by Wellficent.

Open source record ↗

JSON ↗Explore 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
31/5-4 A	0.00 km	2,603 m	Norwegian Offshore Directorate — Wellbores
31/5-4 AR	0.00 km	2,603 m	Norwegian Offshore Directorate — Wellbores
31/5-4 AR2	0.00 km	2,610 m	Norwegian Offshore Directorate — Wellbores
31/5-1	0.87 km	860 m	Norwegian Offshore Directorate — Wellbores
31/5-2	0.93 km	2,500 m	Norwegian Offshore Directorate — Wellbores
31/5-2 R	0.93 km	2,500 m	Norwegian Offshore Directorate — Wellbores
31/5-I-23 H	1.18 km	2,040 m	Norwegian Offshore Directorate — Wellbores
31/5-I-23 AH	1.18 km	4,798 m	Norwegian Offshore Directorate — Wellbores
31/5-I-23 BY1H	1.18 km	5,594 m	Norwegian Offshore Directorate — Wellbores
31/5-I-23 BY2H	1.18 km	5,372 m	Norwegian Offshore Directorate — Wellbores
31/5-I-23 BY3H	1.18 km	6,723 m	Norwegian Offshore Directorate — Wellbores
31/5-I-22 H	1.18 km	2,002 m	Norwegian Offshore Directorate — Wellbores

Digital well log

SODIR formation tops, drilling-mud samples and well tests on one measured-depth section.

Total depth: 1909
True vertical depth (RKB): 1706
Water depth: 316
Bottom-hole temperature: 57

Depth (m MD, RKB)

Digital well log
Group	Formation	Depth (m MD, RKB)
GROUP	NORDLAND GP	340 / 654
GROUP	HORDALAND GP	654 / 1,205
GROUP	ROGALAND GP	1,205 / 1,449
FORMATION	BALDER FM	1,205 / 1,292
FORMATION	SELE FM	1,292 / 1,393
FORMATION	LISTA FM	1,393 / 1,449
GROUP	SHETLAND GP	1,449 / 1,470
FORMATION	HARDRÅDE FM	1,449 / 1,461
FORMATION	UNDIFFERENTIATED	1,461 / 1,470
GROUP	CROMER KNOLL GP	1,470 / 1,515
FORMATION	RØDBY FM	1,470 / 1,507
FORMATION	ÅSGARD FM	1,507 / 1,515
GROUP	VIKING GP	1,515 / 1,909
FORMATION	DRAUPNE FM	1,515 / 1,619
FORMATION	SOGNEFJORD FM	1,619 / 1,830
FORMATION	HEATHER FM	1,830 / 1,879
FORMATION	FENSFJORD FM	1,879 / 1,909

Mud density (g/cm³)
Depth (m MD, RKB)	Mud density (g/cm³)	Quality flags
376	1.05
425	1.05
425	1.05
710	1.05
943	1.05
943	1.3	zero-meaning-unresolved
943	1.05	zero-meaning-unresolved
943	1.05	zero-meaning-unresolved
943	1.35
943	1.31
1005	1.31
1261	1.32
1440	1.32
1508	1.25
1529	1.32
1569	1.24
1571	1.32
1571	1.26
1575	1.26
1648	1.25
1659	1.25
1728	1.25
1803	1.25
1803	1.25
1803	1.25
1803	1.25
1803	1.26
1803	1.15
1803	1.25
1805	1.25
1805	1.25
1805	1.25
1809	1.25
1811	1.25
1865	1.25
1879	1.25
1908	1.24
1908	1.25
1959	1.25
2025	1.25
2089	1.25
2133	1.25
2227	1.25
2366	1.25
2518	1.25
2585	1.2	zero-meaning-unresolved
2601	1.25
2601	1.25
2601	1.2	zero-meaning-unresolved
2601	1.2	zero-meaning-unresolved
2601	1.25
2601	1.19	zero-meaning-unresolved
2601	1.2	zero-meaning-unresolved
2601	1.2	zero-meaning-unresolved
2601	1.2	zero-meaning-unresolved
2601	1.2	zero-meaning-unresolved
2601	1.2	zero-meaning-unresolved
2603	1.25
2603	1.25
2603	1.25
2603	1.25
2603	1.25
2603	1.25
2603	1.25
2603	1.25
2603	1.25
2603	1.25
2603	1.25

Group tops in offset wells

Group tops below each borehole's own RKB. Not TVD below sea level; deviation and kelly-bushing elevations affect apparent depths.

Group tops in offset wells
Group	31/5-4 S	31/5-4 A	31/5-4 AR	31/5-4 AR2	31/5-1
NORDLAND GP	339.5	339.5	339.5	347	342
HORDALAND GP	654	654	654	661	670
ROGALAND GP	1205	1205	1205	1212	—
SHETLAND GP	1449	1449	1449	1456	—
CROMER KNOLL GP	1470	1470	1470	1477	—
VIKING GP	1515	1515	1515	1522	—

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-P055259	103.16 km	50.00 mW/m2	{"qualityScores":["U3.Mx.-------"]}
R24-P038356	112.27 km	44.00 mW/m2	{"qualityScores":["Ux.Mx.-------"]}
R24-P038365	154.56 km	57.00 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