Storegga Slide - NGI
Storegga Slide - NGI
Storegga Slide - NGI
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Risk Analysis PlanningSTOREGGA MODELUnderstanding of/mostlikely explanation of the<strong>Storegga</strong> <strong>Slide</strong>HAZARD IDENTIFICATION(trigger mechanisms):Shear stress increasingfactors---Shear strength decreasingfactors---ACCIDENT MODELLINGParametric studies to identifymost likely combination oftrigger mechanismsIDENTIFICATION OFSEDIMENT SOURCEAREAS FOR MAJOR &MEDIUM SLIDES IN THEORMEN LANGEINFLUENCE AREA.Influence areas determinedby potential effect ofOrmen Lange activities:- Reservoir subsidence- Underground blowout- Hydrate melting- Anchor forces- Rock fills- TrenchingPOTENTIAL TRIGGERMECHANISMS FORSLIDES CAUSED BYORMEN LANGEACTIVITIES.- Reservoir subsidence- Underground blowout- Hydrate melting- Anchor forces- Rock fills- TrenchingThe <strong>Storegga</strong> slideMajor slides todaySmall slidesCONSEQUENCE MODEL(3rd PARTY):RISKofSUB SEA SLIDESTSUNAMISize and mass/velocityrelationships and impactdistance from slide. Findminimum parameters tocause 3rd party fatalities.Major slides(Tsunami)MediumslidesSmall slides
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