ISSN1008-9446CN13-1265/TE承德石油高等专科学校学报JournalofChengdePetroleumCollege第25卷第1期,2023年2月Vol.25,No.1,Feb.2023红河长9油藏微乳降压驱油体系性能评价及现场应用方群(中石化华北油气分公司石油工程技术研究院,河南郑州450000)摘要:为解决红河长9低孔特低渗储层基质区注水井注入压力高,已接近80%地层破裂压力的问题,通过降低界面张力及增溶原油来实现基质区的降压增油,结合室内评价,优选微乳液体系配方,可降低界面张力至10-2mN/m,每30mL微乳液增溶原油达到3~7mL,同时优化微乳注入参数,质量分数为1%,驱替体积为2PV,现场试验1井次,降压率达17.8%,对应油井含水降低4~6个百分点,日增油47.6%。关键词:特低渗储层;微乳体系;降压驱油中图分类号:TE357文献标志码:B文章编号:1008-9446(2023)01-0017-04PerformanceEvaluationandFieldApplicationofMicro-emulsionDepressurizationandOilDisplacementinChang9ReservoirofHongheOilfieldFANGQun(ResearchInstituteofPetroleumEngineering,SinopecNorthChinaOil&GasBranch,Zhengzhou450000,Henan,China)Abstract:Duetopoorphysicalfeaturesoflowporosityandsuper-lowpermeabilityinChang9Res-ervoirofHongheOilfield,formationfracturingpressurehasreachednearly80%withincreasedwaterinjectionpressure.Byreducinginterfacialtensionandsolubilizingcrudeoil,thepressurereductionandoilincreaseinthematrixareacanberealized.Micro-emulsionsystemisselectedaccordingtoindoorevaluation,thesystemcanreduceinterfacialtensionto10-2mN/m,andevery30mLofmi-cro-emulsionsolubilizescrudeoilto3~7mL,themicro-emulsioninjectionparameterisoptimized.Themassfractionis1%andthedisplacementvolumeis2PV.Thefieldtestshowsthatthereduc-tionofinjectionpressureis17.8%andwatercontentofcorrespondingwellisdecreasedby4~6pointsofpercentage,dailyoilproductionisincreasedby47.6%.Keywords:super-lowpermeabilityreservoir;micro-emulsion;depressurizationandoildisplace-ment基金项目:中国石化科技部项目(鄂尔多斯盆地中生界“断缝体”油藏高效开发关键技术):P21026收稿日期:2021-12-07第一作者简介:方群(1988-),女,山东东营人,助理研究员,硕士,主要从事提高采收率工艺研究工作,E-mail:fan-gqun0319@126.com。红河油田长9储层平...