End user requirements (2) – some examples Alaska summer operations
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Shell Exploration & Production
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End user requirements (2) – some examples
Alaska summer operations
Paul Verlaan
Assess Select Design Construct Operations
Phases of a project
1. Preliminary area description
• historical data on ice type and ice concentration at one location (offshore structure) or along a certain route (shipping, pipeline)
Assess Select Design Construct Operations
Phases of a project
2. drilling
• ice type, ice thickness, ice drift, floe size data around drilling rig
• continuous data around one location
3. seismic operations
• ice edge
• avoid small floes of ice
• cover a wide area once per day
Assess Select Design Construct Operations
Phases of a project
Geotechnical, surveys
• ice edge
• cover a wide area once per day
Assess Select Design Construct Operations
Phases of a project
Local and global ice loads
• historical data on ice type, ice drift, floe size data
• historical data on ice thickness, keel depth, sail height, consolidated layer thickness
• mechanical properties of ice
• full-scale ice load data
• ice-structure interaction data
Assess Select DesignConstruct+ install Operations
Phases of a project
Installation of structures, pipelines
• ice edge
• cover a wide area once per day
Assess Select Design Construct Operations
Phases of a project
1. Marine transportation of oil and gas
• ice concentration, ice type, ice thickness, ice pressure
• cover a wide area once per day
2. Evacuation, oil spill response, platform operations
• ice type, ice thickness, ice pressure, ice drift
• continuous data around one location
Assess Select Design Construct Operations
Phases of a project
3. Supply vessels
• ice concentration, ice type, ice thickness, ice pressure data
• cover a wide area once per day
Limitations of present ice data
1. Limited temporal resolution
• Operations around one location (drilling, EER, OSR)
2. Limited insight in ice-thickness parameters
• Design
• Navigation
Alaska summer 2007 operations
ICCShell VesselDrilling
Ice Command Center
Relay Tower
ICCShell VesselDrilling
Ice Command Center
Relay Tower
ICC
• Two drill rigs + 2 ice breakers + 2 anchor handlers + 2 supply vessels
• Seismic vessel + 2 support vessels
• Geotechnical barge + anchor handler
• Survey vessel + support vessels
• Oil spill response vessels
Kulluk Frontier discovery
IIC -Anchorage
Produce:•Metocean forecast•Ice forecast
Metocean and ice data
Seismic
Geotechnical
Survey
Ice management Team
Drilling
Sources of satellite data:
1. SAR data from RADARSAT-1 satellite (June – December 2007)
• 31 images from Beaufort (100 x 100 km)
• 23 images from Chukchi (100 x 100 km)
• 187 images from Beaufort- Chukchi (450 x 450 km)
2. NOAA - AVHRR data
3. MODIS data from TERRA / AQUA
4. Passive microwave data