油藏中的渗吸作用及其影响因素研究

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(),,:,,,;,,;,0,::,;;,,[1],,,,NPR23[2],,1ö1,Warren2Root[3],ö,,,(1):1998205213:1999202226,,1989,4419996:,;;,;,;(1)A1A(x)55xA(x)KL0Kro+LwKrw5Pc5Sw5Sw5x=-5Sw5tSwx=0=15Sw5xx=Lö2=0(1)A(x)=(2x-L)2(2)A;Sw,;Pc,MPa;,;K,Lm2;KroKrw,LoLw,mPaõs;x,m;A(x),m2;L,m;t,s;(2)R1A(x)55xA(x)5T5x=MK5T5tTx=0=Ts5T5xx=Lö2=0(3)R;M,Jö(m3);K,Jö(dm);t,d;T,;Ts,2,,,,,,,,,3::5462:Kro=K3o1-Sw-Sor(T)1-Swc(T)-Sor(T)No(4)Krw=K3wSw-Swc(T)1-Swc(T)-Sor(T)Nw(5):Swc(T)=0.36ö1+e50-T50(6):Sor(T)=Sori-$Sor(T-Ti)(7)[4]:Pc=Sw-C-1(8)[5]:Lo=Loe100.01587(Te-T)(9):M=(1-)QrCr+(SwQwCw+SoQoCo)(10):=i[1-B(T-Ti)](11)1(%)2510(%)3510(%)3010(mPas)015(m-1)1100153.5(10-3Lm2)51011050.0(mPas)300.040.0500.0K3o0.15K3w0.10.050.15No2.01.52.5Nw2.5C1.50.53.0()5010()50105010200.0(1ö)212210-5(Jödm)371265103(Jög)31347(göcm3)213(Jög)21092(göcm3)0197(Jög)4.184(göcm3)1K3o,;K3w,;No,;Nw,;Sori,;Sor,;Swc,;$Sor,1ö;SoSw,;LoeTe,mPaõs;CrCwCo,Jö(gõ);QrQwQo,göcm3;B,1ö;Ti,;C,1,64199961%,,22()(mPas)(10-3Lm2)(m-1)CNoK3wÉ504060.50.51.50.05Ê125270282.01.752.00.10Ë200500503.53.02.50.15É28.5548.8141.6333.4539.1644.3947.36Ê48.6846.6448.9549.2751.4148.3742.87Ë62.0543.8348.6956.5548.7146.5249.0433.504.987.3223.0912.253.986.17,:,,,,,,,,,;(2),,;,,;,,,,2331,[1],,,,(4),,,,,,7462:4,,,,,,2,4,,:(1),,,(2),,(3),1111,19882OlsenDK,SarathiPS.CaseHistoryofSteamInjectionOperationsatNPR23,TeapotDomeField,Wyoming:AShallowHeterogeneousLight2oilReservoir.SPE257863WarrenJE,RootPJ.ThebehaviorofNaturallyFracturedReservoirs.SPEJ(Sept.1963)245554ChenZ,LiuH.NewCapillaryPressureModlesforParameterEstimationtoInterpretCentrifugeData.SPE25045511211987(PA),PA,PA,PA(),,,PA58419996ItisshownbytheoreticalresearchandpracticalstatisticsthattherelationshipNp=f(fw)isdependedmainlyontheviscosityrateofoilandwater.Subjectwords:reservoir,water2drivecharacteristiccurve,application,limitationZhangHongling.Researchontheimbibitionanditseffectfactorsoffracturedreservoir.O-GRT,1999,6(2):4448Amathematicalmodeltakingspontaneousimbibitionasmainrecoverymechanismforfrac2turedreservoirhasbeenbuilt,andsensitivitystudyonrecoverywasperformed.Ithasbeenshownthatfracturedensityisthemajoreffectfactoronimbibitionforisothermalprocess,thegreaterthedensity,thehighertherecovery.Whilefracturesisfilledwithhightempera2turefluid,theeffectoftemperatureatrocksurfaceonrecoveryisgreaterthanfractureden2sity.Changingtemperaturecandecreasecrudeviscosity,increasetheelasticenergyandim2provewettabilityofrocksurface,andenhancetheultimateoilrecovery.Recoveryshowsanexponenttrendtofracturedensity,anddeclineindexisrelatedtomatrixsurface’stempera2ture.Subjectwords:fracturedreservoir,matrix,imbibition,capillarypressure,modelXiangXiaoli,ZhangXi.Applicationoffiniteelementmethodinpredictingreservoirporosi-tyandpermeability.OGRT,1999,6(2):4953Thepaperappliesfiniteelementmethodtoconstructtrianglegrid,andthewellsarelookedasnods.Arealdistributionofreservoirpropertiesispredictedbycalculatingthefiniteele2mentequationwithlinearLagrangeinterpolationfunctionandover2relaxation.TheupperlayerS4ofLuojiaoilfieldisusedasanexampletopredictthechangesofporosityandperme2ability.Theaveragerelativeerrorbetweenthepredictedandactualvalueis9.36%and14.6%respectivelybytesting12wells.Itisprovedthatfiniteelementmethodisfeasibletopre2dictarealdistributionofporosityandpermeability.Subjectwords:finiteelementmethod,porosity,permeabilityLiDongqing,SunYumin,YouDongqingetal.ApplicationofacidizingwithtemporaryyplugginginblockJin45ofJingqiuoilfield.OGRT,1999,6(2):5460BlockJin45ofJingqiuoilfieldisatertiarysystemsandstonereservoir,thefieldisinhighwa2tercutlaterstageaftermanyyearsdevelopment,mostofitsoilwellsandinjectionwellshasbeenacidizedmanytimes.Withtheincreasingofwatercutinoilwells,theunevenamonglayersbecomemoreandmoreseriousandtheconventionalacidizingtechnicscouldnotmeettheneedofpresentfieldproduction.Sothetechnicofacidizingwithtemporarypluggingwastestedinthisblockandgoodresulthasbeenobtained,1.62104taccumulationincrementaloiland6.2104m3incrementalinjectionhavebeenreached,anditprovidesusefulexperi2encetothesametypereservoirs’development.Subjectwords:acidizing,temporaryplugging,research,application,JingqiuoilfieldÌOil&GasRecoveryTechnology:EnglishAbstractsJune1999

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