Generated 10.03.2010
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The NPD's Fact-pages |
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Generated 10.03.2010 |
| NPDID wellbore: | 5465 | |
| Well name: | 7122/7-5 | |
| Drilling operator name: | Eni Norge AS | |
| Geodetic datum: | ED50 | |
| Coordinates: | 71° 16` 24.70`` N | 22° 16` 40.43`` E |
| UTM coordinates: | 7908600.89 N | 545789.79 E |
| UTM zone: | 34 | |
| Drilled in production licence: | 229 | |
| Area: | BARENTS SEA | |
| Discovery: | 7122/7-1 GOLIAT | |
| Field: | GOLIAT | |
| Drill permit: | 1130-L | |
| Drilling facility: | POLAR PIONEER | |
| Drilling days: | 22 | |
| Wellbore entry date: | 23.12.2006 | |
| Wellbore completion date: | 13.01.2007 | |
| Original wellbore purpose: | WILDCAT | |
| Wellbore purpose: | WILDCAT&APPRAISAL | |
| Wellbore status: | P&A | |
| Wellbore contents: | OIL | |
| Discovery wellbore: | NO | |
| Formation/age with hydrocarbons 1: | KOBBE FM / MIDDLE TRIASSIC | |
| Seismic location: | inline 1579 & crossline 2978 (survey NA01M1 3D) | |
| Kelly bushing elevation (KB) [m]: | 23 | |
| Water depth [m]: | 370 | |
| Total Depth (MD) [m]: | 2186 | |
| Final vertical depth (TVD) [m]: | 1973 | |
| Max inclination [°]: | 46.10 | |
| Bottom hole temperature [°C]: | 51 | |
| Oldest penetrated age: | MIDDLE TRIASSIC | |
| Oldest penetrated formation: | KOBBE FM | |
| Note: All depths, except the water depth, are relative to kelly bushing (RKB) | ||
General
Well 7122/7-5 A is a side track to well 7122/7-5 well, which was as an exploration/appraisal well on the Goliat West Prospect, a downthrown fault compartment compared to the proved hydrocarbon accumulations of Goliat. Well 7122/7-5 penetrated reservoirs in the Early Jurassic/Late Triassic Realgrunnen Group, the Late Triassic Snadd Formation, and the Middle Triassic Kobbe Formation and into the Early Triassic Havert Formation. All reservoirs were found water bearing. Sidetrack well 7122/7-5 A was drilled to explore the potential of the Kobbe Formation on the east up thrown side of the fault.
Operations and results
Well 7122/7-5 A was drilled with the semi-submersible installation Polar Pioneer. The well was kicked off below the 13 3/8" casing from 1075 m on 23 December 2006 and drilled to TD at 2186 m (1973 m TVD RKB) in the Middle Triassic Kobbe Formation. Some problems with the MWD and with tight hole were experienced. Formate mud previously used for drilling the 7122/7-1, -2, -3, -4S, and -5 was used from kick-off to TD.
Top Triassic was encountered at 1200 m. The top Snadd Formation was encountered at 1286 m, 4 m TVD deeper than prognosis. Top Kobbe Formation was encountered at 1844 m, with top of the oil-bearing reservoir at 1944 m (1761.8 m TVD MSL), 9.2 m TVD shallower than prognosis.The oil-water contact was interpreted to be at 2014 m (1817m MSL) based on intersecting oil and water gradients. No oil shows were observed above Kobbe level. Shows on cuttings were observed from 1940 m down to Total Depth at 2186 m.
No conventional cores were taken in the well. The MDT (Modular Dynamic Tester) was used for fluid sampling. Oil was sampled from the Kobbe reservoir at 1998.5 m, and at 1978.0 m.
Testing
No drill stem test was performed.
Interval [m]: 1100.00 - 2186.00
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] |
|---|---|---|---|---|---|
| INTERM. | 9 5/8 | 1895.0 | 12 1/4 | 1907.0 | 1.73 |
| OPEN HOLE | 2186.0 | 8 1/2 | 2186.0 |
| Depth MD [m] | Mud weight [g/cm3] | Visc. [MPa.s] | Yield [pnt Pa.] | Mud type | Date measured |
|---|---|---|---|---|---|
| 1760 | 1.31 | 13.0 | FORMPRO | ||
| 1839 | 1.31 | 15.0 | FORMPRO | ||
| 2186 | 1.30 | 13.0 | FORMPRO | ||
| 2186 | SEAWATER |
No drill stem test in this wellbore.
| Log type | Intervals logged [m] |
|---|---|
| MWD - HR RES | 1030 - 2186 |
| AC HRLA TLD HGNS ECS HNGS | 1985 - 2050 |
| MDT GR PPC MSIP | 1945 - 2033 |
| MSCT GR | 1940 - 2015 |
| VSP GR ACT | 574 - 2060 |
| Top depth [m] | Litostratigraphic unit |
|---|---|
| 394 | NORDLAND GP |
| 643 | NYGRUNNEN GP |
| 643 | KVITING FM |
| 655 | ADVENTDALEN GP |
| 655 | KOLMULE FM |
| 961 | KOLJE FM |
| 998 | KNURR FM |
| 1080 | HEKKINGEN FM |
| 1168 | FUGLEN FM |
| 1200 | KAPP TOSCANA GP |
| 1200 | TUBÅEN FM |
| 1218 | FRUHOLMEN FM |
| 1286 | SNADD FM |
| 1844 | SASSENDALEN GP |
| 1844 | KOBBE 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.
No documents presently available.
