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Generated 10.02.2012 |
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| NPDID wellbore: | 64 | |
| Well name: | 2/6-3 | |
| Drilling operator name: | Elf Petroleum Norge AS | |
| Geodetic datum: | ED50 | |
| Coordinates: | 56° 31` 49.32`` N | 3° 49` 25.38`` E |
| UTM coordinates: | 6265553.75 N | 550669.46 E |
| UTM zone: | 31 | |
| Drilled in production licence: | 008 | |
| Area: | NORTH SEA | |
| Drill permit: | 352-L | |
| Drilling facility: | BYFORD DOLPHIN | |
| Drilling days: | 109 | |
| Wellbore entry date: | 09.11.1982 | |
| Wellbore completion date: | 25.02.1983 | |
| Original wellbore purpose: | WILDCAT | |
| Wellbore purpose: | WILDCAT | |
| Wellbore status: | P&A | |
| Wellbore contents: | DRY | |
| Discovery wellbore: | NO | |
| Seismic location: | 8180 223 SP 84,5 & 980 401 SP 267 | |
| Kelly bushing elevation (KB) [m]: | 25 | |
| Water depth [m]: | 71 | |
| Total Depth (MD) [m]: | 4060 | |
| Final vertical depth (TVD) [m]: | 4060 | |
| Max inclination [°]: | ||
| Bottom hole temperature [°C]: | 134 | |
| Oldest penetrated age: | PRE-DEVONIAN | |
| Oldest penetrated formation: | BASEMENT | |
| Note: All depths, except the water depth, are relative to kelly bushing (RKB) | ||
General
Well 2/6-3 is located on the north western flank of the Mandal High between the Søgne Basin and the Central Graben in the North Sea.It was drilled to test possible hydrocarbon accumulations in Late and Middle Jurassic sandstones. A third objective was to reconnoitre below base Permian.
Operations and results
Wildcat well 2/6-3 was spudded with the semi-submersible installation Byford Dolphin on 9 November 1982 and drilled to TD at 4060 m, 270 meter into pre-Late Devonian basement rock. Technical problems occurred in the 12 1/4" section due to twist-off of Kelly saver, loss of 2700 m logging cable in hole, and 9 5/8" casing hanger collapse, causing a total of 203 hrs lost time. In the 8 1/2" section an anchor chain parted during a storm and four days were lost waiting on weather and re-anchoring. The well was drilled with water based mud.
In the Late Jurassic only marine shales were encountered. At 3545 m, 200 m higher than prognosed a Middle Jurassic, fluvial sandstone of Bajocian age (Bryne Formation) was found water bearing. A sequence of anhydrite, dolomite and pure anhydrite was found below the Triassic red-shales, but no salt or Rotliegendes reservoir rocks were encountered. The Permian anhydrite was followed by a series of slated shales and phyllitic rocks, getting progressively more and more deformed, and with an introduction of metamorphism towards TD. Rb-Sr dating on 1-micron fraction material from 3875 m gave an age of 376 Ma in the Late Devonian. No oil shows were reported from the well. Background gas was recorded down to top Permian. No gas was recorded below top Permian.
Three cores were cut. K1was cut at 3551 - 3560 m in Bryne Formation sandstone with 85% recovery. K2 was cut at 3886 - 3895 m in basement rock with 11% recovery (one meter, presumed to be from the top of the interval), and K3 was cut in basement at TD with 58% recovery. RFT pressure points were obtained but no wire line fluid samples were taken.
The well was permanently abandoned on 25 February 1983 as a dry well.
Testing
No drill stem test was performed.
Interval [m]: 180.00 - 4053.00
Core length [m]: 12.60
| Core number | Interval |
|---|---|
| 1 | 3551-3558.7 |
| 2 | 3886-3887 |
| 3 | 4053-4056.9 |
No scanned core photos available
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 | 155.0 | 36 | ||
| SURF.COND. | 20 | 793.0 | 26 | 803.0 | 1.75 |
| INTERM. | 13 3/8 | 2494.0 | 17 1/2 | 2504.0 | 1.70 |
| INTERM. | 9 5/8 | 3435.0 | 12 1/4 | 3449.0 | 1.95 |
| LINER | 7 | 3910.0 | 8 1/2 | 4060.0 |
| Depth MD [m] | Mud weight [g/cm3] | Visc. [MPa.s] | Yield [pnt Pa.] | Mud type | Date measured |
|---|---|---|---|---|---|
| 100 | 1.06 | waterbased | |||
| 350 | 1.11 | waterbased | |||
| 820 | 1.14 | waterbased | |||
| 1350 | 1.18 | waterbased | |||
| 1700 | 1.24 | waterbased | |||
| 2545 | 1.34 | waterbased | |||
| 3160 | 1.52 | waterbased | |||
| 3520 | 1.61 | waterbased | |||
| 3780 | 1.57 | waterbased |
No drill stem test in this wellbore.
| Log type | Intervals logged [m] |
|---|---|
| ISF SLS GR | 157 - 4061 |
| LDL CAL GR | 157 - 2503 |
| LDL CNL CAL GR | 2417 - 4062 |
| HDT | 2417 - 3450 |
| HDT | 3437 - 4062 |
| CBL VDL | 91 - 2497 |
| CST GR | 2505 - 3443 |
| CST GR | 3452 - 4025 |
| CST GR | 3464 - 3850 |
| NGS | 3437 - 4052 |
| VELOCITY | 840 - 3889 |
| RFT | 3602 - 3548 |
| Top depth [m] | Litostratigraphic unit |
|---|---|
| 96 | NORDLAND GP |
| 1530 | HORDALAND GP |
| 2818 | ROGALAND GP |
| 2818 | BALDER FM |
| 2827 | SELE FM |
| 2870 | LISTA FM |
| 2918 | VÅLE FM |
| 2940 | SHETLAND GP |
| 2940 | EKOFISK FM |
| 3020 | TOR FM |
| 3225 | HOD FM |
| 3391 | TYNE GP |
| 3391 | MANDAL FM |
| 3427 | FARSUND FM |
| 3545 | VESTLAND GP |
| 3545 | BRYNE FM |
| 3638 | NO GROUP DEFINED |
| 3638 | SMITH BANK FM |
| 3729 | ZECHSTEIN GP |
| 3790 | NO FORMAL NAME |
| 3918 | BASEMENT |
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.
| 2_6_3_Completion_Report_Geological | (Format:PDF. Size: 15.622 Mb ) |
| 2_6_3_Completion_log | (Format:PDF. Size: 1.920 Mb ) |
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| WDSS_General_Information | (Format:PDF. Size: 0.159 Mb ) |
| WDSS_completion_log | (Format:PDF. Size: 0.331 Mb ) |
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