Generated 10.02.2012
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Generated 10.02.2012 |
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| NPDID wellbore: | 260 | |
| Well name: | 2/5-5 | |
| Drilling operator name: | Amoco Norway Oil Company | |
| Geodetic datum: | ED50 | |
| Coordinates: | 56° 34` 54.40`` N | 3° 25` 49.10`` E |
| UTM coordinates: | 6271055.43 N | 526433.88 E |
| UTM zone: | 31 | |
| Drilled in production licence: | 006 | |
| Area: | NORTH SEA | |
| Discovery: | 2/5-3 SØRØST TOR | |
| Field: | NOT YET DEVELOPED | |
| Drill permit: | 81-L | |
| Drilling facility: | ZAPATA EXPLORER | |
| Drilling days: | 63 | |
| Wellbore entry date: | 09.12.1972 | |
| Wellbore completion date: | 09.02.1973 | |
| Original wellbore purpose: | APPRAISAL | |
| Wellbore purpose: | APPRAISAL | |
| Wellbore status: | P&A | |
| Wellbore contents: | OIL | |
| Discovery wellbore: | NO | |
| Formation/age with hydrocarbons 1: | TOR FM / LATE CRETACEOUS | |
| Seismic location: | ||
| Kelly bushing elevation (KB) [m]: | 36 | |
| Water depth [m]: | 65 | |
| Total Depth (MD) [m]: | 3456 | |
| Final vertical depth (TVD) [m]: | ||
| Max inclination [°]: | ||
| Bottom hole temperature [°C]: | 107 | |
| Oldest penetrated age: | LATE CRETACEOUS | |
| Oldest penetrated formation: | TOR FM | |
| Note: All depths, except the water depth, are relative to kelly bushing (RKB) | ||
General
Well 2/5-5 was drilled ca 2 km southwest of the 2/5-3 S ør øst Tor Discovery well in the southern Norwegian North Sea. It was drilled to appraise the S ør øst Tor Discovery
Operations and results
Appraisal well 2/5-5 was spudded with the jack-up installation Zapata Explorer on 9 December 1972 and drilled to TD at 3456 m in the Late Cretaceous Tor Formation.
Top Paleocene was encountered at 3058 m, top Danian chalk (Ekofisk Formation) at 3176 m, and top Maastrichtian chalk (Tor Formation) at 3274 m. The only oil show reported above top Cretaceous was in thin dolomite stringers at 2940 - 2950 m. Oil shows were recorded in the Tor Formation from the top and down to 3383 m. Oil was confirmed by testing in the Tor Formation.
Two cores were cut in the interval 3284 - 3321 m in the Tor Formation. No wire line fluid sample was taken.
The well was permanently abandoned on 9 February 1973 as an oil appraisal.
Testing
Three drill stem tests were conducted in the Tor Formation. The following results are after acidizing:
DST 1 tested the interval 3428 - 3437 m in. At the end of the flow period only load water had come to surface and the pressure had dropped to zero.
DST 2 tested the interval 3355 - 3366 m. After 31 hours flow only acid and water cushion was produced to surface.
DST 3 tested the intervals 3297 to 3298 m + 3307 to 3308 + 3312.9 to 3313.5 m. This test produced 72 Sm3 oil, 12430 Sm3 gas, and 195 m3 water /day on a 64/64" choke. The GOR was 171 Sm3/Sm3 and the oil gravity was 39.4 deg API.
Interval [m]: 144.78 - 3441.19
Core length [m]: 36.58
| Core number | Interval |
|---|---|
| 1 | 10776-10838' |
| 2 | 10838-10896' |
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 | 151.0 | 36 | 151.0 | |
| SURF.COND. | 20 | 374.0 | 26 | 389.0 | |
| INTERM. | 13 3/8 | 1586.0 | 17 1/2 | 1601.0 | |
| INTERM. | 9 5/8 | 3061.0 | 12 1/4 | 3080.0 | |
| LINER | 7 | 3461.0 | 8 1/2 | 3456.0 |
No mud data available.
| Test no. | Test interval [m] | Choke size [mm] | Final shut in pressure [MPa] | Final flow pressure [MPa] | Bottom hole pressure [MPa] | Downhole temperature [°C] |
|---|---|---|---|---|---|---|
| 1.0 | 3425 - 3434 | 0 | ||||
| 3.0 | 3297 - 3313 | 25.4 | 0 |
| Test no. | Oil [Sm3/day] | Gas [Sm3/day] | Oil grav. [g/cm3] | Gas grav. rel.air | GOR [m3/m3] |
|---|---|---|---|---|---|
| 1.0 | 0 | 0 | 0 | ||
| 3.0 | 72 | 12430 | .829 | 171 |
| Log type | Intervals logged [m] |
|---|---|
| GR | 366 - 1650 |
| BHC-C | 1596 - 3456 |
| IES | 1589 - 3459 |
| FDC CNL | 3094 - 3459 |
| DL | 3064 - 3459 |
| CNL CCL | 2987 - 3441 |
| PML | 3064 - 3458 |
| DIR | 3064 - 3458 |
| CDM | 1589 - 3458 |
| CDM AP | 1589 - 3458 |
| CDM PP | 1589 - 3458 |
| CDM FP | 1598 - 3065 |
| CDM SP | 1589 - 3458 |
| CBL | 1015 - 3441 |
| VELOCITY | 1589 - 3456 |
| Top depth [m] | Litostratigraphic unit |
|---|---|
| 100 | NORDLAND GP |
| 1887 | HORDALAND GP |
| 3058 | ROGALAND GP |
| 3058 | BALDER FM |
| 3063 | SELE FM |
| 3069 | LISTA FM |
| 3161 | VÅLE FM |
| 3176 | SHETLAND GP |
| 3176 | EKOFISK FM |
| 3274 | TOR FM |
| Top depth [m] | Litostratigraphic unit |
|---|
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.
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