1/9-3 R

Exploration · Appraisal · P&A · Gas/condensate · Den norske stats oljeselskap a.s · Tommeliten A · PL 044

1/9-3 R is an appraisal exploration wellbore in the North Sea, drilled by Den norske stats oljeselskap a.s, entered May 27, 1978, to 4,570 m in the Haugesund Fm.

Discovery 1/9-1 Tommeliten Alpha · On the map →

4,570: m total depth · 4,566 m vertical
76.5: m water depth
May 27, 1978: entered · completed Sep 30, 1978
Haugesund Fm: at total depth · Late Jurassic
95.9: m of core in 8 cores
—: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED SEP 30, 1980

On file for this wellbore

What the Directorate holds from this wellbore. Each opens the section that lists it.

Drilling

Drilling facility: DYVI BETA · Jack-up 3 legs
Drilling days: 127
Kelly bushing elevation: 35.8 m
Maximum inclination: 8.30000019°
Drilling permit: 181-L2
Licensing round: 3
Plugged and abandoned: Sep 30, 1978
Core samples available: Yes
Cuttings samples available: Yes
Position · ED50: 56.41547° N, 2.90423° E
Hydrocarbons in: Ekofisk Fm · Paleocene
Hydrocarbons in: Tor Fm · Late Cretaceous

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

Well 1/9-3 is located in the Feda Graben, close to the UK border southwest in the Norwegian North Sea. The primary objective of the well was to evaluate the Jurassic sandstones. The secondary objective was to appraise and test the hydrocarbon bearing zones of Danian and Maastrichtian age (Shetland Group) encountered in 1/9-1. The well was drilled in two phases, of which Phase I is named 1/9-3 and Phase II is named 1/9-3 R. This procedure was a requirement from the Norwegian Petroleum Directorate since Dyvi Gamma came directly from the yard and had therefore not accumulated the experience needed to drill the high pressure Jurassic well to a planned TD of 5000 m. The re-entry 1/9-3 R was to be drilled with the rig Dyvi Beta.

Operations and results

Well 1/9-3 was re-entered (1/9-3 R) with the semi-submersible installation Dyvi Beta on 27 May 1978 and drilled to TD at 4570 m in the Late Jurassic Haugesund Formation. When running the 9 5/8" casing problems occurred with stuck pipe. This resulted in severe delays, but the casing was landed at planned depth. In the 8 1/2" hole the progress was delayed due to hole problems with high pressure and mud weight combined with lost returns. Tight hole and stuck pipe occurred on several occasions. Max mud weight was 2.04 g/cm. The well was drilled water based, but with several additions of diesel from 9 5/8" casing depth and downwards, resulting in 1 - 12 % diesel in the mud at all times below 3835 m.

Several problems arose during the logging operations, which in the end resulted in a poor suit of logs over the reservoir.

In summary the problems were due to uncontrolled stretch in the logging cable, generally poor log quality, especially for FDC/CNL logs, and difficult hole conditions with high pressure/temperature and excessive sticking. Logs that normally are run in combination had to be run separately. This made petrophysical evaluation difficult, and several

Around this wellbore

This wellbore on Sodir FactPages →

About this data

Norwegian Offshore Directorate (Sodir) FactPages, mirrored nightly and used under the Norwegian Licence for Open Government Data (NLOD). Depths are metres along the wellbore from the kelly bushing unless a row gives its own unit; older cores are filed in feet. A zero the Directorate files for an unmeasured pressure, density, or temperature is shown as a dash.

Developers: this page as JSON is GET /v1/data/norway/wells/246, documented in the API reference.