【7A文】WELL STIMULATION TECHNIQUES.pptx

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1、WELLSTIMULATIONTECHNIQUESOpeningupnewchannelsintherockfortheoilandgastoflowthroughiscalledstimulation.Threestimulationtreatmentsarecommonlyused:explosivestobreakuptherock,injectionofacidtopartiallydissolvetherock,andhydraulicfracturingtosplittherockandpropitopenwithproppants.TYPESOFFORM

2、ATIONFORMATIONDAMAGEACIDIZATIONHYDRAULICFRACTURINGWATERSHUTOFF/INJECTIONPROFILEMODIFICATIONSANDCONTROLCOURSEOUTLINETypesofformationrockSandstoneSandgrainscementedbysilica/calciumcarbonateLimestoneComposedmainlyofcarbonateShaleClaymineralandquartzClayKaolinite,Montmorillonite,Illite,Chlo

3、riteSourcesofFormationDamageFormationdamagemayoccurduringfollowingoperationsDrillingCompletionWorkoverStimulationProductionWater/GasInjectionIOR/EORFormationDamageMechanismsFinesMigrationClaySwellingInducedparticlepluggingAsphaltene&SludgedepositionEmulsionBlockScaleBacteriaWaterBlockWe

4、ttabilityAlterationDamagemechanismRemedialmeasuresParticleinvasion/FiltercakeMatrixacidization,Perforation,HydraulicfracturingSwellinganddispersionofindigenousreservoirclaysbythemudfiltrateMatrixacidizationMutualprecipitationofsolublesaltsinthefiltrateandformationwaterMatrixacidizationS

5、lumpingofunconsolidatedsandsSandconsolidationtechniques,FracandPackWaterblock/EmulsionblockSurfactanttreatment,MatrixacidizationOriginsofformationdamage&remediesFormationdamageduringdrillingFracturePluggingShallowMatrixDamageFormationdamage(drilling)FiltercakeWellboreCrossSectionPorePlu

6、ggingDamagemechanismRemedialmeasuresFinesmigrationfromthecementslurryintotheformationMatrixacidization,Perforation,HydraulicfracturingPrecipitationofsolidsfromthecementwithintheformationMatrixacidization,PerforationPrecipitationofsecondarymineralsfollowingreservoirmineraldissolutionMatr

7、ixacidizationOriginsofformationdamage&remediesFormationDamageduringcementingDamagebyOverbalancePerforationDamagemechanismRemedialmeasuresHydrationandswellingofclaymineralsMatrixacidization,ClaystabilizationMovementandpluggingbyclaysizeparticlesintheformationMatrixacidization,Cl