Generated 11.02.2012
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Generated 11.02.2012 |
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| NPDID wellbore: | 264 | |
| Well name: | 2/7-5 | |
| Drilling operator name: | Phillips Petroleum Company Norway | |
| Geodetic datum: | ED50 | |
| Coordinates: | 56° 28` 43.00`` N | 3° 9` 28.00`` E |
| UTM coordinates: | 6259500.11 N | 509718.77 E |
| UTM zone: | 31 | |
| Drilled in production licence: | 018 | |
| Area: | NORTH SEA | |
| Discovery: | 2/7-4 EDDA | |
| Field: | EDDA | |
| Drill permit: | 77-L | |
| Drilling facility: | OCEAN VIKING | |
| Drilling days: | 122 | |
| Wellbore entry date: | 03.09.1972 | |
| Wellbore completion date: | 01.01.1973 | |
| Original wellbore purpose: | APPRAISAL | |
| Wellbore purpose: | APPRAISAL | |
| Wellbore status: | P&A | |
| Wellbore contents: | SHOWS | |
| Discovery wellbore: | NO | |
| Seismic location: | ||
| Kelly bushing elevation (KB) [m]: | 27 | |
| Water depth [m]: | 72 | |
| Total Depth (MD) [m]: | 3353 | |
| Final vertical depth (TVD) [m]: | ||
| Max inclination [°]: | 1.50 | |
| Bottom hole temperature [°C]: | 100 | |
| 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 2/7-5 was drilled ca 4.5 km north-northeast of the 2/7-4 well, which found oil in the Ekofisk and Tor Formations, the Edda Discovery. The objective of the 2/7-5 well was to test the Ekofisk and Tor Formations in order to appraise the extension of this discovery.
Operations and results
Appraisal well 2/7-5 was spudded with the semi-submersible installation Ocean Viking on 3 September 1972 and drilled to TD at 3353 m in the Late Cretaceous Tor Formation. The well was drilled water based with 3 - 6 % oil addition below 1217 m.
The Ekofisk Formation was encountered at 3110 m, and the Tor Formation at 3205 m. Both formations appeared to be hydrocarbon bearing, but the water saturation was high and the permeability was generally low, which probably explained the low flow rates of the zones tested.
Eight conventional cores were cut in the interval 3120 - 3158 m in the Ekofisk Formation, and another five cores were cut in the interval 3219 - 3300 m in the Tor Formation. The cores were reported to bleed gas and oil. Scattered shows (fluorescence) were observed from top of the cored interval and down to 3285 m in the deepest core (core 13).& No wire line fluid samples were taken.
The well was permanently abandoned on 1 January 1973 as a dry well with shows.
Testing
Several drill stem tests were conducted in the limestone and chalk of the Ekofisk and Tor Formations. Many were unsuccessful. Of the technically successful tests DST 1 from 3274 m to 3293 m and DST 2 from 3225 - 3237 m flowed water. DST 3 from 3210 - 3219 m flowed water with gas and trace of oil. DST 4 from 3160 - 3185 m and DST 5 from 3120 - 3130 m flowed minor amounts of gas and water.
Interval [m]: 1525.00 - 3352.80
Core length [m]: 143.87
| Core number | Interval |
|---|---|
| 1 | 10237-10293' |
| 2 | 10293-10350' |
| 3 | 10350-10367' |
| 4 | 10367-10417' |
| 5 | 10417-10431.5' |
| 6 | 10431.5-10490' |
| 7 | 10490-10504' |
| 8 | 10504-10562' |
| 9 | 10562-10570' |
| 10 | 10619-10655' |
| 11 | 10658-10713' |
| 12 | 10714-10771' |
| 13 | 10772-10822' |
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 | 134.0 | 36 | 136.0 | |
| SURF.COND. | 20 | 480.0 | 26 | 494.0 | |
| INTERM. | 13 3/8 | 1217.0 | 17 1/2 | 1217.0 | |
| INTERM. | 9 5/8 | 2433.0 | 12 1/4 | 2443.0 | |
| INTERM. | 7 | 3349.0 | 8 1/2 | 3353.0 |
| Depth MD [m] | Mud weight [g/cm3] | Visc. [MPa.s] | Yield [pnt Pa.] | Mud type | Date measured |
|---|---|---|---|---|---|
| 121 | 1.08 | seawater | |||
| 488 | 1.31 | seawater | |||
| 1219 | 1.43 | 45.0 | waterbased | ||
| 2438 | 1.71 | waterbased | |||
| 3353 | 1.73 | 50.0 | waterbased |
| 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 | 3274 - 3293 | 0 | ||||
| 2.0 | 3225 - 3237 | 0 | ||||
| 3.0 | 3210 - 3219 | 0 | ||||
| 4.0 | 3160 - 3185 | 0 | ||||
| 5.0 | 3120 - 3230 | 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 | ||
| 2.0 | 0 | 0 | 0 | ||
| 3.0 | 0 | 0 | 0 | ||
| 4.0 | 0 | 0 | 0 | ||
| 5.0 | 0 | 0 | 0 |
| Log type | Intervals logged [m] |
|---|---|
| GR | 91 - 481 |
| BHC | 481 - 1230 |
| BHC C | 1216 - 2441 |
| BHC C | 2432 - 3349 |
| IES | 481 - 3352 |
| FDC CNL | 2432 - 3352 |
| DL | 2957 - 3349 |
| CNL | 3002 - 3305 |
| PML | 3048 - 3352 |
| CDM AP PP | 2432 - 3352 |
| CBL | 2359 - 3301 |
| VELOCITY | 481 - 3349 |
| Top depth [m] | Litostratigraphic unit |
|---|---|
| 99 | NORDLAND GP |
| 1748 | HORDALAND GP |
| 2968 | ROGALAND GP |
| 2968 | BALDER FM |
| 2980 | SELE FM |
| 3033 | LISTA FM |
| 3087 | VÅLE FM |
| 3110 | SHETLAND GP |
| 3110 | EKOFISK FM |
| 3205 | TOR FM |
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Composite log (Format:PDF. Size: 0.314 Mb) |
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No geochemical data presently available. Regional geochemical studies which include data from this well may however be filed on a different well.
| 2_7_5_Completion_log.1 | (Format:PDF. Size: 1.165 Mb ) |
| 7_5_Completion_Report | (Format:PDF. Size: 19.100 Mb ) |
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| WDSS_General_Information | (Format:PDF. Size: 0.241 Mb ) |
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