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Generated 11.02.2012 |
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| NPDID wellbore: | 167 | |
| Well name: | 7/11-4 | |
| Drilling operator name: | Phillips Petroleum Company Norway | |
| Geodetic datum: | ED50 | |
| Coordinates: | 57° 7` 30.50`` N | 2° 29` 21.40`` E |
| UTM coordinates: | 6331573.79 N | 469077.56 E |
| UTM zone: | 31 | |
| Drilled in production licence: | 018 | |
| Area: | NORTH SEA | |
| Discovery: | 7/11-5 MIME | |
| Field: | MIME | |
| Drill permit: | 28-L | |
| Drilling facility: | OCEAN VIKING | |
| Drilling days: | 30 | |
| Wellbore entry date: | 02.07.1969 | |
| Wellbore completion date: | 31.07.1969 | |
| Original wellbore purpose: | WILDCAT | |
| Wellbore purpose: | WILDCAT | |
| Wellbore status: | P&A | |
| Wellbore contents: | DRY | |
| Discovery wellbore: | NO | |
| Seismic location: | line PW 7-11 B & SP44 | |
| Kelly bushing elevation (KB) [m]: | 27 | |
| Water depth [m]: | 79 | |
| Total Depth (MD) [m]: | 3322 | |
| Final vertical depth (TVD) [m]: | ||
| Max inclination [°]: | 4.60 | |
| Bottom hole temperature [°C]: | 106 | |
| 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 7/11-4 is located ca 8 km north-east of the Cod Field in the North Sea. The objective of the well was to test the Late Paleocene "Cod Formation" sands, gas bearing in the Cod 7/11-1 and -2 wells; and the Early Paleocene, Danian, which had gas and oil shows in the 7/11-1 well. Other objectives with possible but less likely development of porosity were sands of the Late - Middle Eocene and the top of the Late Cretaceous chalk.
Operations and results
Wildcat well 7/11-4 was spudded with the semi-submersible installation Ocean Viking on 2 July 1969 and drilled to TD at 3321 m in the Late Cretaceous Tor Formation. No significant problems were encountered in the operations.
None of the objectives, the Late - Middle Eocene, the Paleocene Forties Formation, the Danian, or the Late Cretaceous materialized as productive zones. Sand was lacking in the Eocene, and was shaly and tight in the top of the Paleocene Rogaland Group. Only 9 m net of porous sand was encountered in the interval 3082 - 3098 m in the Middle and Lower Rogaland Group. This was below the postulated water table and from logs the net sand interval was water wet. Sands in the Danian section were tight and calcareous, and no porosity was present in the Late Cretaceous chalk. Shows reported from SWC's from the well were described as "oil specks" and "bituminous specks" in sandstones and shales in the interval 3024 - 3093 m in the Rogaland Group.
No cores were cut and no wire line fluid samples were taken.
The well was permanently abandoned on 31 July 1969 as a dry well.
The next well on the structure, well 7/11-5, was drilled in 1982 and found oil in Jurassic Ula sands.
Testing
No drill stem test was performed.
Interval [m]: 640.08 - 3321.10
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 | 20 | 160.0 | 26 | 160.0 | |
| SURF.COND. | 13 3/8 | 589.0 | 17 1/2 | 610.0 | |
| INTERM. | 9 5/8 | 2370.0 | 12 1/4 | 2378.0 | |
| OPEN HOLE | 3322.0 | 8 1/2 | 3322.0 |
| Depth MD [m] | Mud weight [g/cm3] | Visc. [MPa.s] | Yield [pnt Pa.] | Mud type | Date measured |
|---|---|---|---|---|---|
| 610 | 1.02 | waterbased | |||
| 1524 | 1.55 | 47.0 | waterbased | ||
| 2377 | 1.66 | 49.0 | waterbased | ||
| 3170 | 1.50 | 48.0 | waterbased | ||
| 3321 | 1.50 | 47.0 | waterbased |
No drill stem test in this wellbore.
| Log type | Intervals logged [m] |
|---|---|
| IES | 605 - 3319 |
| SGR -C | 595 - 3316 |
| GR | 107 - 595 |
| FDC | 2957 - 3319 |
| SNP | 2957 - 3319 |
| CDM | 2957 - 3319 |
| VELOCITY | 107 - 3322 |
| Top depth [m] | Litostratigraphic unit |
|---|---|
| 106 | NORDLAND GP |
| 1545 | HORDALAND GP |
| 3017 | ROGALAND GP |
| 3017 | BALDER FM |
| 3036 | SELE FM |
| 3042 | FORTIES FM |
| 3107 | LISTA FM |
| 3167 | MAUREEN FM |
| 3183 | SHETLAND GP |
| 3183 | EKOFISK FM |
| 3311 | TOR 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.
| Completion_Report_and_Completion_Log | (Format:PDF. Size: 44.481 Mb ) |
| Daily_Drilling_Report | (Format:PDF. Size: 5.790 Mb ) |
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| WDSS_General_Information | (Format:PDF. Size: 0.173 Mb ) |
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| NPD_Paper_No.10_Lithology__Well_7_11_4 | (Format:PDF. Size: 23.875 Mb ) |
| NPD_Paper_No.10_Lithologic_Correlation_chart__Well_7_11_4 | (Format:PDF. Size: 31.808 Mb ) |
| NPD_Paper_No.10_Paleocene_Correlation_map__Well_7_11_4 | (Format:PDF. Size: 12.072 Mb ) |
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