EOR第七章复合驱ppt课件.ppt

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1、第七章复合驱CombinationFloodingPrinciplesofEOR第一节复合驱的概念Combinationfloodingisthemethodwhichconsistsoftwoormoredisplacementingredient.复合驱是指两种或两种以上驱油成分组合起来的驱动。碱驱（Alkali）表面活性剂驱（Surfactant）聚合物驱（Polymer）表面活性剂强化碱驱（SA）碱强化表面活性剂驱（AS）稠化碱驱（PA）碱强化聚合物驱（AP）三元驱（ASP）SPPS牺牲

2、剂：碱性物质（碳酸钠）多元羧酸（草酸）低聚物（聚乙二醇）改性木质素磺酸盐（磺甲基化木质素磺酸盐）第二节复合驱提高采收率的机理EAP>EA+EP>EP+EA>EP>EAcomparisonofvariousdrivingmethodAlkali+polymerfloodingThenpolymerfloodingThenalkalifloodingPurepolymerfloodingPurealkalifloodingRecovery/%Volumeofinjectedfluid/VP复合驱中的

3、聚合物、表面活性剂和碱之间的协同效应。EASP>EAS+EAP>EAP>EAS协同效应:synergism2.1聚合物的作用(roleofpolymer)Polymercanimprovethemobilityratioofsurfactantandalkalisolutiontooil.Polymercanthickenthefloodingmediaandreducethediffusionrateofsurfactantandalkalireducingthedrugconsumption

4、.Polymercouldreactwithcalciumandmagnesiumionsthatcanprotectthesurfactantwhichmakeitdifficulttoformlowsurfaceactivityofcalciumandmagnesiumsalt.Polymercanenhancethestabilityofoilinwateremulsionformedbyalkaliandsurfactantwithoilandincreasethesweepeffici

5、ency(mechanismofemulsification-entrapment)anddisplacementefficiency(mechanismofemulsification-entrainment)greatly.Mechanismofthecombinationflooding2.2表面活性剂的作用Surfactantcouldreducetheinterfacialtensionofpolymersolutionandoil,andmakeithavetheabilityofw

6、ashingoil.Surfactantcouldemulsifyoilandimprovethefloodingmediumviscosity.Themoretheoilisemulsified,thehigheremulsionviscosityis.Ifthesurfactantandpolymerformcomplexstructure,itcouldincreasetheviscosifyingabilityofpolymers.Surfactantcouldaddthedeficie

7、ncy(不足)ofsurfactantwhichareformedbypetroleumacidwithalkalireaction.(roleofsurfactant)2.3碱的作用(roleofalkali)Alkalicanenhancetheviscosifyingabilityofthepolymer.Surfactantwhichareformedbypetroleumacidwithalkalireactioncanemulsifyoilandimprovethefloodingm

8、ediumviscosity,andstrengthenthemobilitycontrolabilityforpolymer.Surfactantwhichareformedbypetroleumacidwithalkalireactionhaveasynergisticeffectwithsyntheticsurfactant.Alkalicanreactwithcalciumandmagnesiumionsorexchangewithclay,itplaystheroleofsacrifi