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Generated 10.02.2012 |
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| NPDID wellbore: | 512 | |
| Well name: | 25/10-1 | |
| Drilling operator name: | Esso Exploration and Production Norway A/S | |
| Geodetic datum: | ED50 | |
| Coordinates: | 59° 11` 21.72`` N | 2° 19` 14.40`` E |
| UTM coordinates: | 6561487.72 N | 461183.74 E |
| UTM zone: | 31 | |
| Drilled in production licence: | 028 | |
| Area: | NORTH SEA | |
| Discovery: | 25/11-1 BALDER | |
| Field: | BALDER | |
| Drill permit: | 32-L2 | |
| Drilling facility: | GLOMAR GRAND ISLE | |
| Drilling days: | 27 | |
| Wellbore entry date: | 09.07.1970 | |
| Wellbore completion date: | 03.08.1970 | |
| Reentry activity: | DRILLING/PLUGGING | |
| Original wellbore purpose: | WILDCAT | |
| Wellbore purpose: | APPRAISAL | |
| Wellbore status: | P&A | |
| Wellbore contents: | SHOWS | |
| Discovery wellbore: | NO | |
| Seismic location: | LINE SC 70-shotpoint 136 | |
| Kelly bushing elevation (KB) [m]: | 10 | |
| Water depth [m]: | 124 | |
| Total Depth (MD) [m]: | 2091 | |
| Final vertical depth (TVD) [m]: | 2092 | |
| Max inclination [°]: | 6.00 | |
| Bottom hole temperature [°C]: | 76 | |
| Oldest penetrated age: | EARLY JURASSIC | |
| Oldest penetrated formation: | STATFJORD FM | |
| Note: All depths, except the water depth, are relative to kelly bushing (RKB) | ||
General
Well 25/10-1 R is a re-entry of well 25/10-1, which found strong shows in thin Early Eocene sands, but was suspended at top Paleocene level due to heavy autumn storms. The purpose of the re-entry was to test the Early Eocene sands and to extend the well into deeper Paleocene sands, which were anticipated to be oil-bearing.
Operations and results
Appraisal well 25/10-1 was re-entered (25/10-1 R) with the vessel Glomar Grand Isle on 9 July 1970. The re-entry well was kicked off at 1664 m in 25/10-1 and drilled to final TD at 2091 m in the Early Jurassic Statfjord Formation. No significant problems were encountered in the operations. The well was drilled with seawater/spersene XP-20, Splinex mud from kick-off to TD.
From kick-off down to 1747 m the well drilled the same lithology as the primary well. The underlying Paleocene section was composed of sands and shales, with the sand bed thicknesses ranging from about 4 to 40 m. These Paleocene sands were highly porous and permeable, but only the top 5 m had good oil shows and this section produced water only on wire line formation test. The Paleocene section rested directly on the Early Jurassic Statfjord Formation. Sands within the Statfjord Formation were of reservoir quality, but were water-wet with only streaks of non-fluorescing dead oil.
The section from 1731 to 1804.1 m was cored all through in five cores, with near 100% total recovery. The upper two of these (core #9 and #10) were partially overlapping with the lower three cores (core #6, #7, and #8) in well 25/10-1. A total of twelve wire line FIT samples were attempted and five of them were reported to contain formation fluid. FIT no 1 and 2 were taken in the Paleocene sands (Heimdal Formation) at 1789.2 m and 1778.2 m. These recovered only water and mud. The remaining successful FIT recovered hydrocarbons: FIT no 4 at 1760.8 m (Heimdal Formation) recovered gas and 4800 cm3 oil, FIT no 6 at 1762.4 m (Heimdal Formation) recovered gas and 8250 cm3 oil, while FIT no 7 at 1701.4 m (Balder Formation) recovered about 1000 cm3 oil and oil-cut mud.
The well was permanently abandoned on 3 August 1970. It is classified as a well with shows.
Testing
No drill stem test was performed.
No cuttings in this wellbore.
Core length [m]: 142.04
| Core number | Interval |
|---|---|
| 1 | 5480-5517' |
| 2 | 5517-5549' |
| 3 | 5550-5605' |
| 4 | 5605-5645' |
| 5 | 5645-5688' |
| 6 | 5688-5705' |
| 7 | 5705-5719' |
| 8 | 5719-5733' |
| 9 | 5680-5714' |
| 10 | 5725-5756' |
| 11 | 5767-5797' |
| 12 | 5799-5859' |
| 13 | 5859-5919' |
No scanned core photos available
No palynological slides in this wellbore.
No oil samples available.
| Type | Casing diam. [inch] | Depth below KB [m] | Hole diam. [inch] | Hole depth below KB [m] | Lot mud eqv. [g/cm3] |
|---|---|---|---|---|---|
| OPEN HOLE | 2092.0 | 8 1/2 | 2092.0 |
| Depth MD [m] | Mud weight [g/cm3] | Visc. [MPa.s] | Yield [pnt Pa.] | Mud type | Date measured |
|---|---|---|---|---|---|
| 2092 | spersen/wat |
No drill stem test in this wellbore.
| Log type | Intervals logged [m] |
|---|---|
| IEL | 1645 - 2090 |
| SON BHC GR | 1368 - 2090 |
| MLL CAL | 1369 - 2090 |
| FDC | 1369 - 2090 |
| DIP | 1645 - 2090 |
| Top depth [m] | Litostratigraphic unit |
|---|---|
| 134 | NORDLAND GP |
| 555 | UTSIRA FM |
| 675 | NO FORMAL NAME |
| 733 | HORDALAND GP |
| 733 | SKADE FM |
| 1045 | NO FORMAL NAME |
| 1192 | NO FORMAL NAME |
| 1247 | NO FORMAL NAME |
| 1682 | ROGALAND GP |
| 1682 | BALDER FM |
| 1699 | INTRA BALDER FM SS |
| 1705 | BALDER FM |
| 1717 | SELE FM |
| 1730 | HERMOD FM |
| 1745 | SELE FM |
| 1756 | HERMOD FM |
| 1762 | SELE FM |
| 1763 | LISTA FM |
| 1775 | HEIMDAL FM |
| 1800 | LISTA FM |
| 1804 | HEIMDAL FM |
| 1844 | LISTA FM |
| 1859 | HEIMDAL FM |
| 1901 | LISTA FM |
| 1911 | HEIMDAL FM |
| 1916 | LISTA FM |
| 1928 | HEIMDAL FM |
| 1932 | LISTA FM |
| 1960 | SHETLAND GP |
| 1960 | EKOFISK FM |
| 1963 | NO GROUP DEFINED |
| 1963 | STATFJORD FM |
No composite log presently available.
No geochemical data presently available. Regional geochemical studies which include data from this well may however be filed on a different well.
No documents presently available.
