Generated 10.02.2012
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Generated 10.02.2012 |
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| NPDID wellbore: | 250 | |
| Well name: | 2/1-2 | |
| Drilling operator name: | BP Norway Limited U.A. | |
| Geodetic datum: | ED50 | |
| Coordinates: | 56° 57` 30.76`` N | 3° 12` 32.07`` E |
| UTM coordinates: | 6312932.05 N | 512705.46 E |
| UTM zone: | 31 | |
| Drilled in production licence: | 019-B | |
| Area: | NORTH SEA | |
| Drill permit: | 187-9L | |
| Drilling facility: | NORSKALD | |
| Drilling days: | 75 | |
| Wellbore entry date: | 14.12.1977 | |
| Wellbore completion date: | 26.02.1978 | |
| Original wellbore purpose: | WILDCAT | |
| Wellbore purpose: | WILDCAT | |
| Wellbore status: | P&A | |
| Wellbore contents: | DRY | |
| Discovery wellbore: | NO | |
| Seismic location: | ||
| Kelly bushing elevation (KB) [m]: | 24 | |
| Water depth [m]: | 70 | |
| Total Depth (MD) [m]: | 3556 | |
| Final vertical depth (TVD) [m]: | ||
| Max inclination [°]: | 3.50 | |
| Bottom hole temperature [°C]: | ||
| Oldest penetrated age: | LATE PERMIAN | |
| Oldest penetrated formation: | ZECHSTEIN GP | |
| Note: All depths, except the water depth, are relative to kelly bushing (RKB) | ||
General
Well 2/1-2 is located on the Sørvestlandet High, ca 6 km northwest of the Gyda Field in The North Sea. The objective was to test possible Late Jurassic sands within a salt-induced structural high.
The well is Reference Well for the Mandal and Ula Formations.
Operations and results
Wildcat well 2/1-2 was spudded with the semi-submersible installation Nordskald on 14 December 1977 and drilled to TD at 3555 m, 15 m into Late Permian Zechstein anhydrite. The well was drilled with seawater and gel down to 174 m, with Lime Drispac from 174 m to 3135 m, and with Lignosulphonate from 3551 m to TD.
Fifty-two meter of Maureen Formation was encountered at 2692 m, directly overlying the Tor Formation at 2743.5 m. The Cromer Knoll Group came in at 3121.5 m, and top Jurassic shales (Mandal Formation), at 3299 m. The Mandal Formation was seen as a potentially excellent source rock for major oil, but was marginally mature on-structure. The well penetrated water-bearing Late Jurassic sandstone (Ula Formation) at a depth of 3316 m. The sandstone was 30.5 m thick and had porosities of less than 10% and permeabilities less than 1 md. The well then penetrated 37.5 m of argillaceous Middle Jurassic sandstone and 156 m of interbedded Triassic sandstones and siltstones with occasional mudstones. No shows were observed in the well while drilling.
One full hole core was cut within the Ula Formation sandstone from 3318 to 3336 m. No wire line fluid samples were taken.
The well was permanently abandoned on 26 February 1978 as a dry well.
Testing
No drill stem test was performed.
Interval [m]: 180.00 - 3551.00
Core length [m]: 18.18
| Core number | Interval |
|---|---|
| 1 | 3318-3336.18 |
 3318-3322m |
 3322-3327m |
 3327-3331m |
 3331-3336m |
 3336-3336m |
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 | 169.0 | 36 | 174.0 | |
| SURF.COND. | 20 | 557.0 | 26 | 562.0 | |
| INTERM. | 13 3/8 | 2226.0 | 17 1/2 | 2231.0 | |
| INTERM. | 9 5/8 | 3138.0 | 12 1/4 | 3140.0 | |
| OPEN HOLE | 3551.0 | 8 1/2 | 3551.0 |
| Depth MD [m] | Mud weight [g/cm3] | Visc. [MPa.s] | Yield [pnt Pa.] | Mud type | Date measured |
|---|---|---|---|---|---|
| 174 | sea water | ||||
| 310 | spud mud | ||||
| 774 | 1.40 | 43.0 | waterbased | ||
| 1303 | 1.41 | 43.0 | waterbased | ||
| 2104 | 1.50 | 52.0 | waterbased | ||
| 2482 | 1.49 | 49.0 | waterbased | ||
| 2672 | 1.48 | 49.0 | waterbased | ||
| 2853 | 1.52 | 50.0 | waterbased | ||
| 3277 | 1.49 | 52.0 | waterbased | ||
| 3550 | 1.56 | 48.0 | waterbased |
No drill stem test in this wellbore.
| Log type | Intervals logged [m] |
|---|---|
| ISF SONIC | 90 - 3555 |
| FDC CNL | 2445 - 3555 |
| CDM | 3132 - 3285 |
| CDM AP | 3151 - 3274 |
| CDM PP | 3146 - 3274 |
| TEMP | 1413 - 2350 |
| Top depth [m] | Litostratigraphic unit |
|---|---|
| 94 | NORDLAND GP |
| 1624 | HORDALAND GP |
| 2524 | ROGALAND GP |
| 2524 | BALDER FM |
| 2581 | SELE FM |
| 2603 | LISTA FM |
| 2692 | MAUREEN FM |
| 2744 | SHETLAND GP |
| 2744 | TOR FM |
| 3015 | HOD FM |
| 3122 | CROMER KNOLL GP |
| 3122 | RØDBY FM |
| 3299 | TYNE GP |
| 3299 | MANDAL FM |
| 3316 | VESTLAND GP |
| 3316 | ULA FM |
| 3347 | BRYNE FM |
| 3384 | NO GROUP DEFINED |
| 3384 | SMITH BANK FM |
| 3540 | ZECHSTEIN GP |
No composite log presently available.
| File 1 | (Format:PDF. Size: 2.143 Mb ) |
| File 2 | (Format:PDF. Size: 3.681 Mb ) |
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| Completion_Report_and_Completion_Log | (Format:PDF. Size: 13.241 Mb ) |
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| WDSS_General_Information | (Format:PDF. Size: 0.201 Mb ) |
| WDSS_lithlog | (Format:PDF. Size: 0.064 Mb ) |
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