subsea water injection treatment
TRANSCRIPT
8/6/2019 Subsea Water Injection Treatment
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TheRequirement:Injectingseawaterintoreservoirsormaintenanceoreservoirpressureandincreasedoilrecovery(IOR)isalongestablishedandcommonpractice.Treatmentothewaterbeoreinjectionishoweveressentialtoavoidpluggingandsouringothereservoir.Thetreatedseawaterisinjectedintothemaineldreservoirthroughplatorm-basedinjectionwells,orcanbetransported
outtosubseainjectionwellsthroughlongfowlines.Whilethisapproachhasservedtheindustryormanyyears,itdoesimposesomechallenges,mainlyimplicationsassociatedwithbeingabletoeectivelydrainaeld.
AsanalternativesolutiontoenhanceIORandmaximiseproduction,SWIThasbeenunderdevelopmentandtestingsince2003.SincethenithasbeenawardedourpatentsandwonaninnovationawardatONSin2006.
Aspartoitscontinueddevelopment,ullscalesubseapilotplanttrialswererequiredandITFworkedincollaborationwithWellProcessingtosecureindustryundingromseveralinternationaloilcompaniesoreldtrialling.ThisalsobroughtabouttheopportunitytosecureurtherundsromDEMO2000andmarked
thersttimethatthetwobodieshaveworkedinconjunctiontosecuresupportoraJointIndustryProject(JIP).
TheSolution:The18monthlongSWITJIPwaslaunchedinDecember2008withsupportromourmajoroilandgasoperatorsandDEMO2000.Thetechnologyallowsorsigniicantreductioninsolidscontent,providestwoindependentmethodsor‘online’sterilisationoseawater–electro-chlorinationandanewmethodorsterilisationviahydroxylradicalgeneration-andalsoincludessystemsterilisation.
TheMethod:WellProcessingdevelopedtheSWITtechnologytoallowreservoirengineersthereedomtothinkoutsidethebox.Becauseatopsideswatertreatmentandinjectionplantisreliantonthedatagatheredrominitialappraisalwellinormation,itmaybeinadequateortheeldsneedsoveritsentirelietime.
SWITgivesreedomochoicewithrespecttothenumberandlocationoinjectionwells–itallowsorinjectionoasmuchtreatedseawaterasrequired,whererequired–withouttypicalhostplatormrestrictions.Thistechnologyessentiallyallowsthedecisiononwaterinjectionneedstobedelayeduntilthereservoirisupandrunningbecauseoperatorscanseehowareservoirreactsthenprovidewaterinjectionasrequiredratherthanhavingtoestimateuturerequirementsanddesignthemintotheplatormattheoutset.
Implementation:TherstphaseotheSWITproject,engineeringdesignandabrication,isnownearingcompletionandthepilotplantisduetobetransportedtoNIVA’smarineresearchcentreinOslojordorsubsea
testing.Onceproven,thesubseawatertreatmentsystemwillbecombinedwithexistingsubseawaterinjectionpumpingequipment.
TheOutcomes:SWITexpandsthechoicesavailabletooperatorsandallowsorinjectionoasmuchtreatedseawaterasrequired,whererequired–withouttherestictionsandlimitationsassociatedwithusingahostplatorm.ThetechnologyisbeingcontinuallydevelopedandotherapplicationsorSWITincludeboostingpressureinolderreservoirsandthedevelopmentosatelliteeldsthatwouldotherwisebeuneconomical.
Well Processing’s innovative subsea water injectiontreatment (SWIT) system is undergoing full-scalepilot plant trials thanks to support from ITF andNorway’s DEMO 2000 initiative. SWIT provides analternative to topsides seawater treatment by doingeverything on the seabed. The system offers a subsea
seawater treatment solution to add to existingsubsea pumping and christmas tree technology.
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Hydrogen VentingSubseaControl Unit
Hydroxyl RadicalGenerator
Electrochlorinator
‘Still’ Room
Subsea water injectiontreatment (SWIT)
Case Study:
TheIndustryTechnologyFacilitatorTheEnterpriseCentreExplorationDriveBridgeoDonAberdeenAB238GX+44(0)[email protected]