Flank Platforms
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Valhall flank platforms
The Valhall flank platforms are two identical unmanned wellhead platforms equipped with 16 drilling slots each.
The flank platforms are important for production and to improve the field recovery rate including reach of more remote resources.
| Date Discovered | 1975 | |||
Ownership: |
35.953125% 64.046875% |
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| Estimated production | Included in Valhall main field figures | |||
| Remaining reserves | Included in Valhall main field figures | |||
| Cummulative production | Included in Valhall main field figures | |||
| No. of Wells/Depth | 16 slots each WHP | |||
| Formation | Tor Formation chalk | |||
| Field Life | 30 years | |||
| Pipeline Details | Duplex, rating 310 barg design pressure. Pipeline was trenched & buried | |||
| Power Cable | 1.6 Mega-watt cable to each WHP | |||
| Design Weight | 1600 Tons (dry) Topsides 2250 Tons (dry) Jacket 1400 Tons (dry) Piles, 4@ 96" dia. |
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| Control/Communication System | Fibre optic cable to Valhall host platform | |||
| Water Depth | South WHP 66.7m (LAT) North WHP 69.4 m (LAT) |
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| Oil Export Route | Teeside, England via Ekofisk | |||
| Gas Export Route | EMDEN, Germany via Norpipe | |||
| Recoverable Reserves | 40-70 MMbbl + gas each WHP | |||
| Reservoir Pressure | 6600 psi | |||
| Reservoir Temperature | 90º C | |||
| No drilling rig | Based on jack up rig drilling | |||
Consists of two identical unmanned wellhead platforms each equipped with 16 drilling slots and located about 6
km (one to the North and one to the South) from the existing Valhall Facilities where well streams are processed.
Currently about eight wells are drilled from each platform, one waste injector and seven producers. There is room for future water injection and gas lift at either wellhead platform. The two wellhead platforms are powered from Valhall and monitored from the existing Valhall facilities via a fiber optic cable.
Each flank has a multiphase pipeline back to the Valhall field centre for processing. Pipeline material is of 13 percent chrome. Pipelines have been welded together at their fabrication site before being reeled onto a vessel for offshore installation. Tie-in facilities to Valhall basically consist of pig receiving and heating.
The South Flank started production 8th May 2003. While the North Flank came on stream 7th January 2004.
Drilling was resumed in January 2012 on the North Flank with the jack up drilling rig "Maersk Reacher". This followed on from initially being used as hotel the first three months for VFG - Valhall Flank Gas Lift Project. The plan is to drill 3 wells at Valhall Flank South summer 2013 with an option of one extra if the results from the pilot give the desired result. On Valhall Flank North, 3-4 production wells will be drilled from the same wellhead platform. After the drilling campaign is finished on the Flank North, the rig will be moved to Flank South where three wells will be drilled.
Currently about eight wells are drilled from each platform, one waste injector and seven producers. There is room for future water injection and gas lift at either wellhead platform. The two wellhead platforms are powered from Valhall and monitored from the existing Valhall facilities via a fiber optic cable.
Each flank has a multiphase pipeline back to the Valhall field centre for processing. Pipeline material is of 13 percent chrome. Pipelines have been welded together at their fabrication site before being reeled onto a vessel for offshore installation. Tie-in facilities to Valhall basically consist of pig receiving and heating.
The South Flank started production 8th May 2003. While the North Flank came on stream 7th January 2004.
Drilling was resumed in January 2012 on the North Flank with the jack up drilling rig "Maersk Reacher". This followed on from initially being used as hotel the first three months for VFG - Valhall Flank Gas Lift Project. The plan is to drill 3 wells at Valhall Flank South summer 2013 with an option of one extra if the results from the pilot give the desired result. On Valhall Flank North, 3-4 production wells will be drilled from the same wellhead platform. After the drilling campaign is finished on the Flank North, the rig will be moved to Flank South where three wells will be drilled.
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