低界面张力体系改变岩石润湿性机理分析

《低界面张力体系改变岩石润湿性机理分析》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、-7户ResearchofRockWettabilityAlterationMechanismsConcerningLowInterfacialTensionSystemWangSuoliang(Oil&GasFieldDevelopmentEngineering)DirectedbyPro￡WangYefeiAbstractQuartzwasusedastypicallysurfaceofsandstonereservoirinthispaper，compositionsofoilwhichinducedwe

2、ttabilityalterationofquartzsurfacewasstudiedandquartzsurfacewithdifferentwettabilityWasobtained．Themechanismsofwettabilityalterationinducedbydifferentsurfactantsystemwerestudied．Optimizedsurfactantsystemswithdifferentabilityofinterracialtensionreductionandwe

3、ttabilityalterationwereselected．Staticwashingoilandoildisplacementexperimentwareconductedtostudythesynergisticeffectofinterracialtensionreductionofoilwaterinterfaceandwettabilityalterationofrocksurfaceonoilrecovery．Thedataofexperimentsshowthattheadvancingang

4、leofformationwateronwaterwetquartzsurfaceisabout10．030．WhenthequartzWassoakedbyoilacidtoluenesolution，theadvancinganglechangestoabout71．400；ifthequartzWastremedbyasphaltenetoluenesolutionorformationoil，theadvancingangleisabout93．510．Quartzwasagedby20％heptane

5、—oilmixture，theadvancinganglechangestoabout138．6。．AnalysisofIRspectraindicatesthatasphalteneinteractwithhydroxylsonquartzsurfacebypolarreaction，andasphalteneCanabsorbedonquartzsurfacewithionboad她．SurfactantCallaltersthewettabilityofquartzsurfaceatverylowconc

6、entration，anionicsurfactanthassmallinfluenceofthewettabilityofwaterwetquartzsurfaceandCallchangestheintermediateoroilwetquartzsurfacetostrongwaterwet．Thestaticwashingoilandoildisplacementexperimentresultsareallsuggestthatlowerinterfacialtensionofoilwaterinte

7、rfaceorchangetherockwettabilitytowaterwetonlyCannotgetthehighestoilrecoveryratioexcepttoperformingthesynergisticeffectofinterracialtensionreducfionandrocksurfacewettabilityalteration．Keywords：quartz，surfactant，wettability，wettabilityalteration，interfacialten

8、sion，synergeticeffect●l^目录．．第一章前言⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯1第二章油藏岩石润湿性研究概述⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯32．1油藏岩石润湿性的表征⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．32．1．1定量测定方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯32．1。2定性测定方法⋯⋯⋯⋯