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东河油田注气出砂主次影响因素及技术对策
Title:MainFactorsandTechnologicalMeasuresforSandProductionduringGasInjectionintheDongheOilfield
Abstract:
Theproductionofsandduringgasinjectionoperationsinoilfieldscanleadtosevereeconomiclossesandposevarioustechnicalchallenges.InthecaseoftheDongheOilfield,sandproductionhasbeenidentifiedasasignificantissueduringgasinjection.ThispaperaimstoanalyzethemainfactorsinfluencingsandproductionintheDongheOilfieldandproposeappropriatetechnologicalmeasurestomitigatethisproblem.
1.Introduction:
Gasinjectionisacommonenhancedoilrecovery(EOR)techniqueemployedtoincreaseoilrecoveryfrommatureoilfields.However,theprocesscanleadtosandproduction,whichhampersproductionefficiency,damagesdownholeequipment,andincreasesoperationalcosts.TheDongheOilfieldhasexperiencedsandproductionissuesduringgasinjection,makingitcrucialtoinvestigatethemainfactorscausingthisproblemandidentifyeffectivetechnologicalmeasures.
2.MainFactorsInfluencingSandProductionduringGasInjection:
2.1.ReservoirCharacteristics:
Thepermeabilityandporosityofthereservoirplayasignificantroleindeterminingsandproductionduringgasinjection.High-permeabilitychannelsorzonescanactaspreferentialpathsforgasflow,resultinginlocalizedpressuredropsandsubsequentsandmobilization.
2.2.FluidFlowRate:
Therateatwhichgasisinjectedintothereservoircanaffectsandproduction.Higherinjectionratestendtoincreasethevelocityoffluidsinthereservoir,leadingtoincreasedshearstressontheformationandconsequentsandproduction.
2.3.RockMechanics:
Themechanicalpropertiesoftherock,suchasitscompressivestrength,Young'smodulus,andPoisson'sratio,playacriticalroleindeterminingthepossibilityofsandproduction.Weakerrockformationsaremorepronetofailureandsandproductionduringgasinjection.
2.4.WaterSaturation:
Thepresenceofwaterinthereservoircancontributetosandproductionduringgasinjection.Wateractsasalubricant,reducingthefrictionalstrengthofgrainsandfacilitatingtheirmobilization.
2.5.OverburdenPressure:
Themagnitudeoftheoverburdenpressurealsoinfluencessandproduction.Hi