The Proactima way Hvordan bruke oljedriftsimuleringer til å forbedre planlegging av brønner og optimalisere oljevernberedskap Tekna Beredskapsdagene 2014 Espen Hoell og Jared Eckroth PREPARED.
Proactima fokus - miljørisikoanalyse Bedre planlegging av brønner Valg av beste tidspunkt Sammenlikning av ulike brønndesign Reduksjon av miljørisiko Kvantifisering av nytte av risikoreduserende tiltak Større nytte av miljørisikoanalysene Dette oppnås ved å kjøre Et standardisert oppsett av et begrenset antall simuleringer og naturressurser Gjentas for hvert tiltak som vurderes (årstid, i brønn/på rigg, beredskapsalternativ,...)
Proactima fokus beredskapsanalyse Bedre planlegging av oljevernberedskap Optimal anvendelse av ressurser og bekjempelsesmetoder Bedre forståelse av hvordan ressursene virker under ulike forhold Mer realistiske øvelser og bedre informasjon under reelle hendelser Bedre planlegging av kystnær beredskap Redusert miljøkonsekvens av utslipp
Gjennomført og pågående utviklingsarbeid Oljedriftsimuleringer med beredskap 3D animasjon av oljedrift og beredskapstiltak Utviklingsarbeidet i samarbeid med DHI høyoppløselige oljedriftsmodell MIKE 3 HD OS utviklet av DHI Modellen dekker alle norske havområder med høy oppløsning i tid og rom Tidevannskrefter er inkludert
3 case studies using the oil spill modeling tool MIKE 3HD BY JARED ECKROTH
Case study 1 Well planning How can simple oil drift simulations be used to reduce risk during well planning? Factors which influence environmental risk 1. Seasonal changes in oil drift 2. Changes in BOR - an important factor in environmental risk Questions to be answered from simulations 1. Stranding amounts 2. Shortest drift time to NCS 3. Recommendations for best times of the year to commence drilling operations 4. Effect of emergency preparedness 5. Planning coastal oil spill response
Case study 1 Well planning Simulations setup Location of spill Norwegian Sea Oil type Light crude Blowout rate 3500 Sm3/day Blowout duration 12 days Tracking of oil -30 days Duration of entire simulation 42 days Position of blowout sea surface 12 hour time frames
Case study 1 - Legend Volume of oil at sea (Sm3). As oil weathers it will go from red colors to purple colors
Case study 2 - oil spill cleanup simulations Purpose Improve understanding during oil spill exercises Better positioning of resources during real spill situations Verify emergency measures for oil spill cleanup operations Plan for contingencies Test various cleanup methods (mechanical recovery & chemical dispersion) Training of emergency response personnel Understand the influences of weather on oil spills
Case study 2 - oil spill cleanup simulations Simulation setup Location of spill North Sea Oil type Medium crude Blowout rate 4220 Sm3/day Blowout duration 24 hours Tracking of oil -24 hours days Duration of entire simulation 48 hours Position of blowout subsea
Case study 2 - oil spill cleanup simulations Animation guide 15 min time steps Total particles released 920 1 particle equals 4.6 Sm3 oil In total 4220 Sm3 of medium crude released over 24 hours
Case study 2 - oil spill cleanup simulations 1 NOFO systems catchment distance (300m) is represented by two black dots e.g. 1 NOFO system = Dots get further apart as more NOFO systems arrive on the scene. e.g. 9 NOFO systems NOFO systems arrival time is according to response times Two barriers Number of systems needed calculated by oil spill dimensioning rate. As oil passes through the barrier and is removed from the simulation at a rate governed by the weather conditions and the equipment uptake capacities.
Case study 2 - oil spill cleanup simulations - Red is oil particles that are on the surface and down to 1 meter in water depth - Blue are oil particels that are greater then 1 meter depth
Results 9 booms removed 51 % of the emulsion after 48 hours. Factors effecting uptake efficiency Spreading of oil Changes in ocean current direction Oil being pushed under the surface Wave height Amount of daylight
Case study 3-3D simulations Simulation inputs Location of spill Norwegian Sea Oil type Light crude Blowout rate 7100 Sm3/day Blowout duration 30 days Tracking of oil -30 days Duration of entire simulation 60 days Position of blowout Subsea
Case study 3-3D simulations Animation guide Time steps is 45 min Total particles released 860 In total 214620 Sm3 of light crude released over 30 days
Case study 3 Coastal response planning -Time taken for first stranding 22 days -No emergency measures applied to the spill -Double the size of the spill as compared to case 1 (7000 Sm3/day for 30 days) Aim identification of stranding areas and volumes
Case study 3-3D simulations Map overlays
Case study 3-3D simulations Volume of oil at sea (Sm3). As oil weathers it will go from brown colors to black colors
Sammendrag og konklusjon - Espen Integrasjon av oljedriftsimulering og testing av risikonivå i brønnplanlegging kan redusere miljørisiko Risikoreduksjon kan kvantifiseres Planlegging av oljevernberedskap kan forbedres ved bruk av detaljerte oljedriftsimuleringer Bedre muligheter for visualisering av oljedrift er svært nyttig i beredskapsøvelser og reelle hendelser
Prepared.