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1、哈尔滨石油学院本科生毕业设计（论文）摘要近几年来，聚合物驱油技术在油田得到广泛应用。为适应油田聚合物驱的需求，本文在聚驱提高原油采收率原理的基础上，通过物理模拟实验和数值模拟技术，研究了聚合物的弹性效应、聚合物分子构型、聚合物段塞组合、油层厚度和油层垂向渗透率对聚驱开发效果的影响。结果表明：聚合物的弹性效应可提高原油采收率，其弹性作用最佳质量浓度为1.0～2.0g/L；清水聚合物溶液中聚合物分子以网状构型为主，增粘效果较好，污水聚合物溶液中聚合物分子以枝状构型为主，增粘效果较差；聚合物段塞尺寸和粘
2、度是影响聚驱效果的决定因素,段塞尺寸保持不变时，溶液粘度越高，采收率增幅越大，溶液粘度保持不变时，段塞尺寸越大，采收率增幅越大；对于水湿油层，油层越厚，增采效果越好，而油湿油层的厚度对聚驱采收率影响不大；对于正韵律油层，垂向渗透性越强，聚驱增采幅度越高，反之，越低，对于反韵律油层，垂向渗透性越差，聚驱增采幅度越高，反之，越低。文中还提出了一些改善聚驱开发效果的措施，包括：采用污水配制聚合物溶液、优选聚合物注入速度和优选井网井距。本文对油田进行聚合物驱油具有一定的指导意义。关键词：聚合物驱油；影响因
3、素；改善措施；物理模拟；数值模拟III哈尔滨石油学院本科生毕业设计（论文）AbstractInrecentyears,polymerfloodingtechnologywaswidelyappliedinoilfield.Inordertoadaptthedemandsofoilfieldpolymerflooding,inthispaper,onthebasisofpolymerfloodingEORmechanism,byphysicalsimulationexperimentsandnume
4、ricalsimulationtechniques,wemainlystudiedtheinfluentialfactorsofpolymerfloodingeffect,includingpolymersolutionelasticeffect,polymermolecularstructure,polymerslugcombination,reservoirthicknessandreservoirverticalpermeability.Theresultshowedthatthepolym
5、ersolutionelasticeffectcanenhanceoilrecovery,anditsoptimumqualityconcentrationwas1.0～2.0g/L.Polymermolecularhadthenetworkstructureinfreshwater,anditssolutionhadhigherviscosity,ontheotherhand,polymermolecularhaddendriticallystructureinsewagewater,andit
6、ssolutionhadlowerviscosity.Polymerslugsizeandviscositywerethedecisivefactorswhichinfluencedpolymerfloodingeffect.Inthecaseofunchangedpolymerslugsize,thehigherthesolutionviscositywas,thegreaterthepolymerfloodingincreasedrecovery.Whenpolymersolutionvisc
7、ositywasnotchanged,thelargertheslugsizewas,thehighertheoilincreased.Forwater-wetoilreservoir,thethickertheoilreservoirwas,thebetterthepolymerfloodingincreasedoilrecovery,butforoil-wetreservoir,reservoirthicknesshadlittleinfluenceonpolymerfloodingrecov
8、ery.Forpositiverhythmreservoir,thebettertheverticalpermeabilitywas,thehigherthepolymerfloodingincreasedoilrecovery,onthecontrary,thelower.Foranti-rhythmreservoir,theworsetheverticalpermeabilitywas,thehigherthepolymerfloodingincreasedoilrecover
