1 metocean metocean at statoil ocean prediction networking final seminar 12.05.2011 kenneth eik
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Metocean
Metocean at Statoil
Ocean Prediction Networking Final Seminar 12.05.2011
Kenneth Eik
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www.statoil.com
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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
Tidal plant in Kvalsundet
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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
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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
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Operations needing current forecastsSeismic surveys Oil spill drift
Rig movesOperations in ice
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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!
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LOfoten and VEsterålen CURrents (LOVECUR)
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Real-time current data
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Arctic operations
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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.