Eksperter i Team

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Eksperter i Team Gullfakslandsbyen 2008

• Gullfaks historie et norsk svennestykke
• Leif-Kristian Teviterå, Corporate trainee,
  StatoilHydro Gullfaks satelitter Petec

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Structural Depthmap Base Cretaceous
Gullfaks reservoir data
Area 50
km2 Top Structure 1700 m
TVD Dipping 0-20
West Oil-water contact 1947 m
TVD Initial pressue 310
bar Bubblepoint pressure 220 bar Initial
temprature 72 deg C Formation
volume factor 1,2 Oil viscosity
1.2 cp Oil gravity
36.9 API
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Gullfaks main field, WE cross-section
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The Gullfaks-field
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For at en skal få danne et olje/gas felt er det
flere forhold som må oppfylles
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Infill of oil (migration)

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Implemented Oil Recovery Measures at Gullfaks

• Water injection from start
• Upgrading of water injection capacities
• 4D seismic and inversion
• Tracers
• Hydraulic fracturing in low perm reservoirs
• WAG (Water alternating gas) injection
• Huff and puff gas injection
• Extensive exploration activity within drilling
  reach from platforms gt new volumes

• Sand control in most wells
• Designer wells (horizontal, 3D)
• Extended reach drilling (10 km)
• Monobore completions
• DIACS -Smart wells
• Multilateral wells (ML)
• Coiled Tubing drilling (CT)
• Through tubing drilling (TTRD)
• Rig assisted snubbing (RAS)
• Underbalanced drilling (UBD)
• Expandable liners

NPD IOR award for 2004
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Oil Recovery Measures studied

• Currently being studied
• Reservoir characterisation, remaining saturation
  and relative permeability
• Temprature effects
• Building new reservoir simulation models
• WAG evaluations
• EOR with water based methods
• CO2 studies

• Studied, but discarded
• Surfactant injection (1992 pilot)
• Gel blocking (1992 pilot)
• CO2 miscible injection (2000)
• Aerobic Microbiological EOR (2006)

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Well targets Gullfaks in the past and present

Steak vs. ragu
Gullfaks
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Korleis drive eit felt som er på haleproduksjon?
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Finne nye boremål og planlegge nye brønnar utgjør
størsteparten av arbeidsoppgavene til
petroleumsteknisk (Petek) personell på Gullfaks
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• By repeated well-tests we can monitor how the
  flooding affect our reservoirs