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Eksperter i Team – Gullfakslandsbyen 2008

Eksperter i Team – Gullfakslandsbyen 2008. Gullfaks historie – et norsk svennestykke Leif-Kristian Teviterå, Corporate trainee, StatoilHydro Gullfaks satelitter Petec. Structural Depthmap – Base Cretaceous. Gullfaks reservoir data. Area : 50 km2

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Eksperter i Team – Gullfakslandsbyen 2008

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  1. Eksperter i Team – Gullfakslandsbyen 2008 Gullfaks historie – et norsk svennestykke Leif-Kristian Teviterå, Corporate trainee, StatoilHydro Gullfaks satelitter Petec

  2. 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

  3. Gullfaks main field, WE cross-section

  4. The Gullfaks-field

  5. Reservoar Reservoir Felle Trap Seal Segl Modning og migrasjon av hydrokarboner For at en skal få danne et olje/gas felt er det flere forhold som må oppfylles :

  6. Infill of oil (migration)

  7. 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 => 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 Implemented Oil Recovery Measures at Gullfaks NPD IOR award for 2004

  8. Studied, but discarded: Surfactant injection (1992 pilot) Gel blocking (1992 pilot) CO2 miscible injection (2000) Aerobic Microbiological EOR (2006) Oil Recovery Measuresstudied 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

  9. Well targets Gullfaks in the past and present; Steak vs. ragu Gullfaks

  10. Korleis drive eit felt som er på haleproduksjon?

  11. Finne nye boremål og planlegge nye brønnar utgjør størsteparten av arbeidsoppgavene til petroleumsteknisk (Petek) personell på Gullfaks

  12. By repeated well-tests we can monitor how the flooding affect our reservoirs

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