1. Ocean Prediction Networking Final Seminar 12.05.2011
Metocean
Metocean at Statoil
Ocean Prediction Networking Final Seminar
Kenneth Eik

3. Need for metocean information
Design basis for marine structures – extreme values and fatigue
Floating and fixed structures
Pipelines and subsurface structures
Land terminals
Basis for evaluation of marine operations
Reliable weather and ocean forecasts
Data as input to EIA studies (i.e. oil drift)
Design- and energy basis for offshore renewable energy
Huldra jacket
Alt som skal bygges offshore og på land har behov for design verdier for vær.
Bølger har normalt vært den viktigste designparameteren i Nordsjøen.
Denne benytte blant annet til å beregne dekkshøyde.
På dypere vann kan strøm være viktigere enn bølger i design.
Mindre og mer marginale utbygginger setter store krav til kvaliteten på værdata.
Rørledninger har behov for strømdata for stabilitetsvurderinger og for utmattingsberegninger.
De aller fleste operasjoner offshore og på land har operasjonelle værbegrensninger.
Værsensitive operasjoner setter stor krav til pålitelig værmelding
Det er behov for værdata til alle typer miljøstudier, for eksempel oljedrift.
Energiproduksjon for vindmøller går som tredje potes av vinden. Relativt så feil i vindestimatene vil gi relativt større feil i produksjonen. Eksempelvis vil 10% feil i vindestimatet føre til ca 30% feil i energiproduksjonen.
Det er behov for bølgedata til potensielle bølgekraftverk og strømdata til potensielle tidevannskraftverk (som i Kvalsundet i Finnkmark)
Tidal plant in Kvalsundet

4. Tasks – data collection and analyses
Wind and waves
Currents and water level
Sera ice, icebergs, waves in ice/ice in waves
Oceanographic parameters
Temperature, salinity, density, oxygen, etc
Marine growth
Meteorological parameters
Temperature, precipitation, humidity, icing, wind chill, etc.
Always a need to provide data (own initiative or as JIPs)
Measurement campaigns
Hindcast studies
Data purchase
Modelling
Icing at Melkøya January 2006

5. Who ? Einar Nygaard – Oceanographer - UiB
Børge Kvingedal – Meteorologist - UiB
Kjersti Bruserud – Oceanographer –UiB
Odd Jan Andersen – Meteorologist – UiB
Kenneth J. Eik – Civil Engineer Marin Technology – NTNU
Richard Gaches – Oceanographer- UK
Sverre Haver - Civil Engineer Marin Technology – NTNU
Martin Mathiesen - POLYTEC

6. Operations needing current forecasts
Seismic surveys
Oil spill drift
Operations in ice
Rig moves

7. What are the requirements to current forecasts
Not totally wrong!
Direction forecasted 90° compared with real direction or worse
Magnitude more than 200% or less than 50% compared to real magnitude
Need to capture severe and extreme events!
Today most Statoil operations are performed without current forecasts
The skills of oceanographic models need to be documented and communicated!

8. LOfoten and VEsterålen CURrents (LOVECUR)

9. Real-time current data

10. Arctic operations

11. Conclusions
Oceanographic models are needed in a wide range of offshore operations
Hindcast
Forecasts
The quality of oceanographic models need to be known!
Studies performed by the offshore industry so far shows that further developments are needed in a number of ocean basins.
Access to good ice-ocean models even more important in the future
Statoil may provide real time current measurements on request.