Oil Spills in Coastal Areas: Prevention and Control Victoria Broje Bren School of Environmental...
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Transcript of Oil Spills in Coastal Areas: Prevention and Control Victoria Broje Bren School of Environmental...
Oil Spills in Coastal Areas:Prevention and Control
Victoria BrojeBren School of Environmental Science and Management
University of California, Santa Barbara
Oil spill modeling
Oil spill location and properties depend on:
• Initial oil/oil product properties (Chemical composition, density, viscosity, pour point, flash point, maximum water uptake, etc)
• Environmental conditions (Air and sea temperature, wind speed, currents, wave height, water salinity, water sediment load, presence of ice etc.)
• Release conditions (instantaneous, continuous, contained, surface, underwater spill)
• Amount of oil spilled
• Response options
Oil spill modeling – Why even bother?
Application for oil spill modeling:
• Environmental risk assessment for offshore oil fields development.
• Contingency planning.
• Estimation of environmental impact.
Oil spill modeling
What we want to know:
• Where is it? – Hydrodynamic model
• How does it look like? – Oil weathering model
Oil spill modeling
Oil Weathering Model:
• density
• viscosity
• evaporation rate
• dispersion rate
• water content
• pour point
• flash point
• spreading rate
• Properties prediction
• Budget graph
• Response efficiency
• Affected areas and species
Hydrodynamic Model
• location
• surface exposure
• amount of stranded oil
• concentration in the water column
Response Actions Model
• amount of oil dispersed
• collected
• burned
Output:
Oil spill modeling - ADIOS
Instantaneous release:
1000 bbl of• Brent Blend
• Coal Oil Point
at sea temperature of 15ºC
at wind speed of 15 m/s
Laboratory modeling
Emulsification simulation
a) b)a) Emulsification of Kyrtael crude and its residues at 11C
b) Emulsification of Bolshepurgovskaya crude and its residues at 11C (from left to the right: 250C+, 200C+, 150C+, crude)