油層物理課件chap4

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

EnhancedOilRecoveryMethodsShandongProvincialExcellentCourse,2008Contents

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

Polymersoftenused:increasessweepefficiencyduetoimprovedmobilityratioandreducesthetotalvolumeofwaterrequiredtoreachtheultimateresidualoilsaturation.

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

Decreasetheinterfacialtensiontoimprovethedisplacementefficiency1.2Surfactantflooding(表面活性劑驅)Mechanism:Capillarynumber(毛管數(shù)):Methods:LowconcentrationsurfactantslugHighconcentrationsurfactantslugAdsorptionprevention----preflushShandongProvincialExcellentCourse,2008(1).Loweringofinterfacialtension(2).Wettabilitychangefromoil-wettowater-wet(3).Wettabilitychangefromwater-wettooil-wet(4).Emulsificationandentrapment(5).Emulsificationandentrainment(6).Solubilizingtherigidfilmsattheoil-waterinterface.1.3Causticflooding(堿水驅)Mechanism:ShandongProvincialExcellentCourse,2008(1).Steamstimulation(2).Steamflooding(3).Combustionin-situ(4).Hotwaterflooding(5).Electromagneticheating2ThermalProcess(熱力采油)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(蒸汽驅)WellpatternFourzonesduringsteamflooding:(1)Steamzone(2)Hotwaterzone(3)Coldwaterzone(4)OilbankShandongProvincialExcellentCourse,20082.3In-situcombustion(火燒油層)(1)Forwardcombustion(正向燃燒)ShandongProvincialExcellentCourse,20082.3In-situcombustion(火燒油層)(2)Reversecombustion(反向燃燒)ShandongProvincialExcellentCourse,20083Gasinjectionmethod(注氣開采)3.1Classifications3.2Gasused(1)Miscibledisplacement(2)Near-miscibledisplacement(3)Immiscibled