二类油层复合驱配方中化学剂适应性及选取.pdf

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1、2010年6月大庆石油地质与开发June，2010第29卷第3期PetroleumGeologyandOilfieldDevelopmentinDaqingV01．29NO．3DOI：10．3969／J．ISSN．1000—3754．2010．03．032二类油层复合驱配方中化学剂适应性及选取陈广宇'田燕春鹿守亮赵新李星(1．西南石油大学石油工程学院，四川成都610500；2．大庆油田有限责任公司勘探开发研究院，黑龙江大庆163712)摘要：三元复合驱技术在大庆油田的应用将主要集中于剩余地质储量相对较大的二类油层。与一类油层相比，二类油层孔隙半径明显变小、黏土含量及

2、泥质含量显著增加、粒度中值明显降低。针对二类油层储层物性条件相对较差的变化特点，采用多种室内实验相结合的方法，开展了二类油层复合体系配方中化学剂的适应性及优选研究。通过研究给出了二类油层复合驱体系配方中碱及聚合物的选取原则，研究认为强碱对于储层渗透率的影响明显大于弱碱，二类油层复合体系配方中应以弱碱为主；同时给出了三元条件下不同相对分子质量线性聚合物与大庆油田天然岩心渗透率的匹配关系，矿场应用中应根据具体的渗透率分布情况，选择满足80％以上储量分布的渗透率所对应的聚合物相对分子质量为宜。关键词：二类油层；三元复合驱；体系配方；适应性中图分类号：TE351．12文献标

3、识码：A文章编号：1000—3754(2010)03-0150-04ADAPTABILITYANDSELECTIoNoFCHEMICALAGENTSINASPFLooDINGFoRMULAFoRSECOND．CLASSoILLAYERSCHENGuangyu，TIANYah．chun，LUShou—liang，ZHAOXin，LIXing(1．PetroleumEngineeringInstituteofSouthwestPetroleumUniversity，Chengdu601500，China；2．ExplorationandDevelopmentResear

4、chInstituteofDaqingOildCompanyLtd．，Daqing163712，China)Abstract：TheapplicationofASPfloodingtechnologyinDaqingoilfieldwillbefocusedonsecond—classoillayerswithrelativelylargeremaininggeologicalreserves．Comparingwithmajorreservoirs，second—classoillayersproper-tieschangealot，suchassmallerpo

5、reradius，significantincreaseofclaycontentandshalecontent，decreaseofmedianparticlesize．Accordingtothepoorerreservoirpropertiesofthesecond-classoillayers。thestudyofadapta—bilityandoptimizationofchemicalagentsforsecond—classoillayersASPfloodingformulaiscarriedoutthroughmanykindsoflabexper

6、iments．TheselectionprinciplesofalkaliandpolymerinASPformulaforsecond—classoil1ayershavebeenestablishedbasedonstudies．ThestudyindicatesthattheeffectofNaOHOfcorepermeabilityisbiggerthanthatofNa2CO3．Thematchingrelationshipbetweenlinearpolymerwithdifferentmolecularweightandthepermeabilityo

7、fthenaturalcorefromDaqingOilfieldundertheASPfloodingisprovided．Itisrecommendedthat，forpilotapplication，thepolymer，ofwhichitsmolecularweightiscorrespondingtothepermeabilitydistribu。tionrelatedtomorethan80％reserves，shouldbeselected．Keywords：second．classsoillayers：ASPflooding；formulaofA