精选学习资料---------MEORFieldtestatBlockLuo801ofShengliOilFieldinChinaAbstractAMicrobialEnhancedOilRecovery〔MEOR〕fieldtesthasbeenimplementedfor10consecutiveyearsatthe75℃-80℃BlockLuo801inShengliOilFieldinChina,wheremicrobialformulationandnutrient,producingbiosurfactant,wereinjectedintooilwells.AftertheimplementationofMEOR,theproducedfluidsamplesfromtheoilwellswereanalyzedandfoundanincreaseofbacteriaandarchaeainwaterphasestabilizingat103-4cell/mlandasoarofacetateinconcentrationfrom70mg/Lto523.0mg/Lwithoutfindingthetypeofinjectedmicrobialtypes,suggestingthenutrientinjectedhasactivatedtheindigenousbacteriainthereservoir,whoseactivitieswereenhancedtopreventthewatercutfromrisingupintheblocksoastoincreasetheoiloutput.UptoDecember2022,thecumulativeincreasedproductionofoilhasbeen9.75104twiththetotaloutputsurpassingthatofWaterFloodingOilRecovery〔WFOR〕by3.35%.Consideringthecostofinjectedmicrobialfluidandnutrient,oilincreasedpertonnecostsaboutRMB339.56.Keywords:MicrobialEnhancedOilRecovery〔MEOR〕,FieldTest,WaterFlooding1.IntroductionFaultblockoilreservoirsoccupyanimportantproportioninShengliOilFieldofChina,whosedevelopedgeologicalreserveshavereached9.22×108tbutwiththecomprehensivewatercut91.5%.Thushowtostoptheproductiondeclineandenhancethecrudeoilrecoverybecomesamajorchallengetodevelopfaultblockoilreservoirswithhighwatercut.Duetothesmallerareabearingoilandtheincompleteproductionwellgrid,itisnotsuitabletocarryoutchemicalenhancedoilrecoverytechnologyforfaultblockoilreservoirsandalternativeoilrecoverytechnologyisexpectedtobedevelopedforthem.MicrobialEnhancedOilRecovery〔MEOR〕technologyisconsideredpromisingforfaultblockoilreservoirs,whoserelatedresearchwasnotlauncheduntil1990sinShengliOilFieldbyaspecializedteamengagedinresearchandtestinMEOR.Oncetheirpurposewastoselectthebacteriatype,suitableforthereservoirenvironmentandcapabletoenhancetheoildisplacementefficiently,whichwasfirstgroundculturedtheninjectedintothereservoirs.Atthebeginningofthiscentury,researchrevealedindigenousbacteriainreservoirsareveryactive,sotheresearchfocusshiftedtoindigenousbacteriaenhancedoilrecovery.Currently,oilreservoirshavebeenconsideredasanecosystemintowhichmaterialsuchasspecificmicrobialformulation,inorganicororganicnutrientandairhavebeeninjectedtoregulatethem:themicrobialcommunity---本文来源于网络，仅供参考，勿照抄，如有侵权请联系删除---名师归纳总结-----第1页,共9页---本文来源于网络，仅供参考，勿照抄，如有侵权请联系删除---精选学习资料---------structureandfunctioninsidemightchange,increasingthebacteriadensity,producingbiosurfactantandimprovingtheoil-washefficiencythrough"insitubreeding".Basedonresearchinthelaboratory,aMEORfieldtesthasbeencarriedoutinBlockLuo801inShengliOilFieldsince1999.Thetestmethodhasbeenadjustedtwiceinthe10yearperiodinthehopeofexploringthepotentialofMEORtechnologytoimproveoilrecoveryinfaultblockoilreservoirs.2.TestAreaReservoirGeologyBlockLuo801isasmallblockinShengliOilField,alithologic-structuralreservoirwithatemperaturerangingfrom75℃to80℃.Itisopeninthenorthandthesouthernpartisclosedbyaneast-westarcthehangingwall.Theareabearingoilis1.95k104t.Thereservoirdepthisfrom1680mto1pressureis17.5MPa.TheoilpoolofthetestareaislocatedontheWestWingofthenose-likestructure,whosestrataarehighinthesouthandlowinthenorthwithananglerangingfrom5oto6o.Itpassesthroug...