Cloud Computing: GMPP, rCAC and the Importance of Component Level Analysis
PWSRCAC Response System Optimization Project Response System Optimization Project PWS RCAC Board...
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PWSRCAC Response System Optimization Project PWS RCAC Board Meeting Meeting May 4, 2017
Transcript of PWSRCAC Response System Optimization Project Response System Optimization Project PWS RCAC Board...
PWSRCACResponseSystemOptimization
Project
PWSRCACBoardMeetingMeeting
May4,2017
ResearchQuestion
• Whatistheoptimalconfigurationofcontainment,skimming,andstorage(primaryandsecondary) forninePWSrecoverysystems(threeopen-waterandsixnearshore)overafive-daysimulatedspillresponseassumingfavorableweatherconditions?
WeirSkimmer
Oleophilic DiscSkimmer
Scenario
OperationalPeriods
WhatAreWeOptimizing?
• Theamountofoilrecoveredforagivenoperationalperiod
• TryingtomatchDe-ratedEncounterRatewithDe-ratedSkimmerRateandmakebothashighaspossible
RESULTS
• Open-WaterResponseSystems– BaseCase– Optimized
• Nearshore ResponseSystems– BaseCase– Optimized
• SecondaryStorageAnalysis– Nearshore
RecoveredFluids
TRANSREC/GRAMREC - BASECASE
38,067bbl
CB8BARGE- BASECASE
53,012bbl
VALDEZSTAR- BASECASE
14,290bbl
TRANSREC/GRAMREC - OPTMIZE
CB8BARGE- OPTIMIZE
VALDEZ STAR- OPTIMIZE
NEARSHORE BASECASE
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1 2 3 4 5 6 7 8 9 10
BBL
OP
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1 2 3 4 5 6 7 8 9 10OP
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BBL
FreeWater
WaterinEmulsion
Oil
CB4
CB2
J-boo
m
Weir Disc
BBL
BBL
BBL
OP OP
2,236bbl
1,573bbl
2,236bbl
2,076bbl
1,860bbl
593bbl
CB4WEIR- OPTIMIZE
CB4DISC- OPTIMIZE
CB2WEIR- OPTIMIZE
CB2DISC- OPTIMIZE
J-BOOMWEIR- OPTIMIZE
EssentiallythesameasCB4Weir
SECONDARYSTORAGE-OPTIMIZE
SecondaryStorageOptimalOperatingAreaSizefor10OffloadStations
SecondaryStorageModel
RadiusXnm
SecondaryStorageModel
SecondaryStorageBarge
SecondaryStorageModel
SkimmingSystem
PrimaryStorageBarge
SecondaryStorageModel
SecondaryStorageModel
SecondaryStorageModel
SecondaryStorageModel
SecondaryStorageModelInputs:• Radius• Slickthickness• OPlength• Timesteplength• Numberandspecs.ofskimmingsystems• Numberandspecs.ofmini-barges• Numberofoffloadstations• Numberofiterations
Outputs:• Statusofeverythingateachtimestep• Totalfluidsrecovered• Totaloilrecovered
SecondaryStorageModelScenarios:• Assumed120vesselsinascenario• Variednumberofskimmersandandmini-bargestoutilizeall120vessels(eachskimmingsystemuses3vesselsandeachmini-bargeusesonevessel)• e.g.20skimmersand60mini-barges(20x3+60=120)• Raneverycombinationfrom
• zeroskimmers,120mini-barges• 60skimmers,zeromini-barges
• Ranforweirskimmingsystemwith10and18offloadstationsonsecondarystoragebarge• Ranfordiscskimmingsystemwith6and10offloadstationsonsecondarystoragebarge• Ranfor2nmto40nmradius• Raneachscenario100times
SecondaryStorageModel
0 40
20 skimmers60 mini-barges
19,419 bbl
18 Offload StationsWEIR SKIMMERS
2 nm area
SecondaryStorageModel
00 40
14 skimmers78 mini-barges
13,040 bbl
10 Offload StationsWEIR SKIMMERS
2 nm area
SecondaryStorageModel
0 40
Mini-barge-limitedSkim
mer-lim
ited
18 Offload StationsWEIR SKIMMERS
2 nm area
SecondaryStorageModel
00 40
Mini-barge-limited
Skimmer
-limited
Station-limited
10 Offload StationsWEIR SKIMMERS
2 nm area
SecondaryStorageModel
SecondaryStorageOptimal
WeirSkimmingSystems
SecondaryStorageOptimal
DiscSkimmingSystems
SecondaryStorageOptimalDecantingMini-Barges
• InOP4aweirskimmercanfillamini-bargein22minutes• Whenfull,themini-bargewillhold189bbl offree-water• Thecapacityofthede-cantpumpis17bbl/hr• Thusitwillrequire8.9hourstodecant80%ofthatfree-water
• ConsideringthetimeitwouldtakerunbackandforthtotheSecondaryStorageBargeat5kts,rig/de-rig,andpump-outthemini-barge,themini-bargewouldhavetobeatleast20.8nmawayfromtheSecondaryStorageBargefordecantingtomakesense.
Considerations• Potentialoilrecoveryisvaluableasacomparativemetriconly.
• Real-worldtestingandtrainingarecritical.
• Oilpropertiesandweatherconditionsimpactresults.
• Realisticequipmentassumptionsarecritical.
• Resultsregardingdiscskimmerscouldapplytooleophilicskimmersgenerally.
FINDINGS• Oleophilic skimmershavesignificantadvantagesoverweirskimmersduetothelackoffree-waterrecovered.
• Thesoonersystemsaredeployedthebettertotaloilrecoverywillbefortheresponse.
• Open-watersystemsareencounterratelimited.Improvementstothesesystemscanbeachievedbyincreasingtheswath-width.
FINDINGS• Nearshore systemsarepumpratelimitedandcanbeimprovedbyincreasingskimmercapacity.
• Secondarystoragewillrequiremoreoffloadstationsifweirskimmersareused,comparedtodiscskimmers.
• Theoptimalconfigurationforweirskimmingsystemsis18offloadstations,20skimmingsystemsand60mini-barges.
• Theoptimalconfigurationfordiscskimmingsystemsis10offloadstations,26skimmingsystemsand42mini-barges.
FINDINGS• Totaloilrecoverdeclinesbyabout2%pernmfromthesecondarystoragebarge.
• Largeoperatingareasrequiremoremini-bargestooperateefficiently.
• Decantingmini-bargesisnotefficient.
