油层物理课件chap4

SUNRen-yuanRoom648,EngineeringBuildingBNov.,2008ShandongProvincialExcellentCourse,2008chapter4.2

EnhancedOilRecoveryMethodsShandongProvincialExcellentCourse,2008Contents

ChemicalprocessesThermalprocessesGasinjectionmethodOtherprocessesShandongProvincialExcellentCourse,2008HPAMXanthan1Chemicalprocesses1.1Polymerflooding(聚合物驱)Mechanisms:

Polymersoftenused:increasessweepefficiencyduetoimprovedmobilityratioandreducesthetotalvolumeofwaterrequiredtoreachtheultimateresidualoilsaturation.

ShandongProvincialExcellentCourse,2008retentionAdsorptionInaccessibleporevolumeEntrapmentSheardegradationSaltsensitivity1.1Polymerflooding(聚合物驱)Factorsshouldbeconsidered:ShandongProvincialExcellentCourse,2008ShandongProvincialExcellentCourse,2008

Decreasetheinterfacialtensiontoimprovethedisplacementefficiency1.2Surfactantflooding(表面活性剂驱)Mechanism:Capillarynumber(毛管数):Methods:LowconcentrationsurfactantslugHighconcentrationsurfactantslugAdsorptionprevention----preflushShandongProvincialExcellentCourse,2008(1).Loweringofinterfacialtension(2).Wettabilitychangefromoil-wettowater-wet(3).Wettabilitychangefromwater-wettooil-wet(4).Emulsificationandentrapment(5).Emulsificationandentrainment(6).Solubilizingtherigidfilmsattheoil-waterinterface.1.3Causticflooding(碱水驱)Mechanism:ShandongProvincialExcellentCourse,2008(1).Steamstimulation(2).Steamflooding(3).Combustionin-situ(4).Hotwaterflooding(5).Electromagneticheating2ThermalProcess(热力采油)Methods:ShandongProvincialExcellentCourse,2008(1)Thermalexpansionoffluids(2)Compressionofsolutiongas(3)Reducedresidualoilsaturation(4)Wellborecleanupeffect2.1SteamStimulation(蒸汽吞吐)Mechanism:Cyclicsteaminjection,steamsoak,steamhuffandpuffShandongProvincialExcellentCourse,2008SteamstimulationProcess:(1)Steaminjection(2)shut-in(3)productionSinglewell2.1SteamStimulation(蒸汽吞吐)ShandongProvincialExcellentCourse,2008Steamflooding2.2Steamflooding(蒸汽驱)WellpatternFourzonesduringsteamflooding:(1)Steamzone(2)Hotwaterzone(3)Coldwaterzone(4)OilbankShandongProvincialExcellentCourse,20082.3In-situcombustion(火烧油层)(1)Forwardcombustion(正向燃烧)ShandongProvincialExcellentCourse,20082.3In-situcombustion(火烧油层)(2)Reversecombustion(反向燃烧)ShandongProvincialExcellentCourse,20083Gasinjectionmethod(注气开采)3.1Classifications3.2Gasused(1)Miscibledisplacement(2)Near-miscibledisplacement(3)Immiscibled