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Generated 04.02.2012 |
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| NPDID wellbore: | 6106 | |
| Well name: | 6407/2-4 | |
| Drilling operator name: | Det norske oljeselskap ASA (old) | |
| Geodetic datum: | ED50 | |
| Coordinates: | 64° 57` 47.40`` N | 7° 26` 51.20`` E |
| UTM coordinates: | 7205429.55 N | 426693.13 E |
| UTM zone: | 32 | |
| Drilled in production licence: | 380 | |
| Area: | NORWEGIAN SEA | |
| Drill permit: | 1244-L | |
| Drilling facility: | SONGA DELTA | |
| Drilling days: | 40 | |
| Wellbore entry date: | 23.07.2009 | |
| Wellbore completion date: | 31.08.2009 | |
| Original wellbore purpose: | WILDCAT | |
| Wellbore purpose: | WILDCAT | |
| Wellbore status: | P&A | |
| Wellbore contents: | DRY | |
| Discovery wellbore: | NO | |
| Seismic location: | inline 4603 & crossline 2292 | |
| Kelly bushing elevation (KB) [m]: | 29 | |
| Water depth [m]: | 269 | |
| Total Depth (MD) [m]: | 3001 | |
| Final vertical depth (TVD) [m]: | 3000 | |
| Max inclination [°]: | 2.10 | |
| Bottom hole temperature [°C]: | ||
| Oldest penetrated age: | MIDDLE JURASSIC | |
| Oldest penetrated formation: | ILE FM | |
| Note: All depths, except the water depth, are relative to kelly bushing (RKB) | ||
General
The Fongen prospect in PL380 is located northernmost in the Gimsan Basin, to the west of the Midgard Discovery on the Halten Terrace in the Norwegian Sea. Well 6407/2-4 was drilled to test the hydrocarbon and reservoir potential of the large Jurassic pre-rift fault block, named the Midgard West Block. The fault block is down faulted to the west with respect to the Midgard Horst. The primary target of the well was the shallow marine sandstones of the Garn Formation of Middle Jurassic age. Planned TD was TD 30 m into the first water bearing sandstone formation below the Garn Formation.
Operations and results
Wildcat well 6407/2-4 was spudded with the semi-submersible installation Songa Delta on 23 July 2009 and drilled to TD at 3001 m, 30 m into the Middle Jurassic Ile Formation. After drilling to 17 1/2" TD at 1777 m operations were suspended in three hours due to a fire in the generator switch board. During drilling the interval 2630 m to 2800 m significant gas peaks from 1.5% - 9% was observed, matching connection depths. Peaks were regarded as formation gas during drilling, but later experiences on the well indicate that mud weight should have been increased.
The Garn Formation primary target was encountered at 2892 m, 19 m deeper than the prognosis. It proved to be 10.5 m thicker than the prognosticated thickness of 41 m. Petrophysical evaluation of the MWD logs showed that Fangst Group section penetrated by the well had porosities up to 30%, with 67 m net reservoir having 24% average porosity. Water saturation was 95-100% in the entire reservoir range, indicating no residual hydrocarbon saturation. A questionable show on cuttings at 2891 m could be due to the oil based mud, otherwise no fluorescence or oil stain was seen from the cuttings. Apart from gas peaks caused by low mud weight gas readings were very low throughout the reservoir section.
No cores were cut. No wire line logging was performed and no fluid samples were taken.
The well was permanently abandoned on 31 August 2009 as a dry well.
Testing
No drill stem test was performed.
Interval [m]: 1790.00 - 3001.00
No cores in this wellbore.
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] |
|---|---|---|---|---|---|
| CONDUCTOR | 30 | 351.0 | 36 | 354.0 | |
| SURF.COND. | 20 | 749.0 | 26 | 755.0 | 1.49 |
| PILOT HOLE | 755.0 | 9 7/8 | 755.0 | ||
| INTERM. | 13 3/8 | 1773.0 | 17 1/2 | 1777.0 | 2.25 |
| INTERM. | 9 5/8 | 2869.0 | 12 1/4 | 2876.0 | 1.77 |
| OPEN HOLE | 3001.0 | 8 1/2 | 3001.0 |
| Depth MD [m] | Mud weight [g/cm3] | Visc. [MPa.s] | Yield [pnt Pa.] | Mud type | Date measured |
|---|---|---|---|---|---|
| 500 | 1.32 | 21.0 | AQUACOL KCL/POLYMER/GLYCOL | ||
| 1192 | 1.25 | 15.0 | AQUACOL KCL/POLYMER/GLYCOL | ||
| 1639 | 1.64 | 20.0 | CARBO TECH | ||
| 1777 | 1.30 | 19.0 | AQUACOL KCL/POLYMER/GLYCOL | ||
| 1900 | 1.60 | 38.0 | CARBO TECH | ||
| 2876 | 1.62 | 40.0 | CARBO TECH | ||
| 2876 | 1.62 | 43.0 | CARBO TECH | ||
| 3001 | 1.63 | 41.0 | CARBO TECH | ||
| 3001 | 1.25 | 24.0 | CARBO TECH |
No drill stem test in this wellbore.
| Log type | Intervals logged [m] |
|---|---|
| LWD - GR RES | 356 - 2876 |
| LWD - GR RES DEN NEU SON | 2876 - 3001 |
| Top depth [m] | Litostratigraphic unit |
|---|---|
| 298 | NORDLAND GP |
| 298 | NAUST FM |
| 1391 | KAI FM |
| 1594 | HORDALAND GP |
| 1594 | BRYGGE FM |
| 1976 | ROGALAND GP |
| 1976 | TARE FM |
| 2019 | TANG FM |
| 2117 | SHETLAND GP |
| 2117 | SPRINGAR FM |
| 2227 | NISE FM |
| 2386 | KVITNOS FM |
| 2547 | CROMER KNOLL GP |
| 2547 | LANGE FM |
| 2800 | LYR FM |
| 2819 | VIKING GP |
| 2819 | SPEKK FM |
| 2858 | MELKE FM |
| 2892 | FANGST GP |
| 2892 | GARN FM |
| 2943 | NOT FM |
| 2973 | ILE 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.
