低渗透油藏注气提高采收率评价

:1000-2634(2002)05-0046-05X,,,,(,637001):,,,,,,,,,:;;;:TE348:A,,K=(1050)10-3m2[1];K=(110)10-3m2;K0.110-3m2;,,,,,,21,,()()CO2(),,,(90%),,,(K=210-3m2),;(K=7.510-3m2)CO2,[2];[3],(K=(1020)10-3m2),,,(K=0.810-3m2)1,[4]:(1),,;(2),;(3),,;(4),,;(5),;(6),,[3,5],,,,245Vol.24No.5200210JournalofSouthwestPetroleumInstituteOct2002X:2001-11-30:(1965-),(),,,2,,,(K=(17)10-3m2)[4],Ekofisk[6](K=(0.15)10-3m2),(K=1.510-3m2)CO2,AntelopeLostHills(K=0.0810-3m2)CO2;31(K=110-3m2);(K=9.310-3m2),(K=210-3m2)[2],EOR1998420EORCO266,62,1010-3m242;,1010-3m28,,1010-3m24,,1984-1998EOR()1,,CO2,,;,,,10;(2),CO21500m15002000m;15002000m,25003000m;,,,(3),CO2,0.80.85g/cm30.850.9g/cm3,,(4),,,,0.8mPas,CO2,,CO22530MPa,,,,CO2123211CO2CO2,,744:,,K=7.510-3m2,55104t,7.510-3m2,11.8%,0.8324g/cm3,1.6mPas70%,40%,19.49MPa,102.5CO2,:,,10%,,15.82,89%4212[7],,5000104t,,11.7%,0.9710-3m2,(0.840.85)g/cm3,(23)mPas,8.31MPa,(4.656.79)MPa,45,0.46,0.54,,80%C2H6,20.6%,26.3%,5%2132[9]2,K=8.8410-3m2,,,2,,228%,20%,16%,,,,,,,,[3](K=(0.008860.03848)10-3m2,K=0.110-3m2),,1.2PV,,,6.21%;(K=0.810-3m2);,,;,,3[9],:311,,,;,312,,,,,,313,,,,;,,,314[10]842002,CO2,,,54,,,,72,,,5,CO2,,,,,,,6,,,,7,,,,,,,,,,,,,,,,,,,,,,,,,,,,,67944:5(1)21,,;(2),,;(3),CO2;(4),,,,,;(5)CO2,CO2;;(6),,,,,,,,,,,;(7),,;,;(8),,,;,:[1],,,.[A].[C].:,2001.145-175.[2],.CO2[J].,1997,4(4):7-13.[3],,,.[J].,2001,28(2):76-78.[4],,.[J].,1999,22(2):20-23.[5]FK1[M].:,1989.[6]JakobssonNM,ChristianTM.Historyperformanceofgasinjectionofekofisk[C].SPE28933.[7],.[J].,1999,14(1):10-12.[8],,.[J].,1998,3(3):26-28.[9],,.[M].:,1999.[10]MinLi,PingGuo,ShilunLi.Modelingtechniqueofas2phalteneprecipitation[C].SPE70048,2001.[11],,.[J].,2001,28(2):41-44.[12],,.[J].,2000,22(1):9-11.[13],,,.J22[J].,2000,20(3):75-78.[14],,,.[J].,2000,27(1):84-86.[15],,,.CO2[J]..2000,20(2):76-79.[16],,,.[J].,2000,22(3):57-60.[17],,.,[A].()[C].:,1999,371-389.[18],,,.[J].,2000,22(3):41-45.[19],,.CO2[J].,2001,23(2):33-36.()052002Keywords:Combinedreservoir/wellboremodel;gaswatertwoOphaseflow;numericalsimulation;finitevolumemethodNONLINEARFLOWOFGASATLOWVELOCITYINPOROUSMEDIACHENDaiOxun(SouthwestPetroleumInstitute,NanchongSichuan637001,China),WANGZhangOrui,GAOJiaObi.JOURNALOFSOUTHWESTPETROLEUMINSTITUTE,VOL.24,NO.5,40-42,2002(ISSN1000-2634,INCHI2NESE)TheexperimentdataaboutfrictionresistancecoefficientsfandReynoidnumbersReareanalyzedtostudythelawofgasflowatlowvelocityintightporousmedia.AsRedecreases,theporousflowofgasshowsnonlinearphenomenadeviationoffDarcyslawlinearphenomena,andcorrespondingRec=(1.04.4)10-4.Thecollisionsoccurredbetweengasmoleculeandporewallcausethenonlinearphenomena.TherelationshipofflowvelocityVandpressuregradep/Lisgivenaccord2ingtotheoryanalysis.KeyWords:porousmedia;gasflow;lowvelocity;reynoidsnumber;nonlinearANEWDERIVATIONMETHODANDTHEAPPLICATIONOFYOUNGOLAPLACEEQUATIONZHANGMaoOlin(SouthwestPetroleumInstitute,Nan2chongSichuan637001,China),MEIHaiOyan,LIMin,etal.JOURNALOFSOUTHWESTPETROLEUMINSTITUTE,VOL.24,NO.5,43-45,2002(ISSN1000-2634,INCHI2NESE)Thederivationmethodofthethermodynamicequilibriumcriterionisbasedonthebasicconceptionofphysicalchemistryandthebasicthermodynamicprinciple,andcombinedwiththethermodynamicbasicequationandthedefinitionofthechemicalpotential.ThewellOknownYoungOLaplaceequationisobtainedasaresultofthederivation.AnewderivationmethodoftheYoungOLaplaceequationisalsopresented,basedontheinterfa2cialenergy,thepotentialenergy,andthetotalenergyofthewholematerialsystemwhichshouldbeminimumonthether2modynamicequilibriumcondition.Thephaseequilibriumcalcu2lationmodelandapplicationexamplesconsideredcapillarypres2sureisshowedattheendofthispaper.Keywords:YoungOLaplaceequation;thermodynamics;interfacialenergy;potentialenergy;phaseequilibrium.EVALUATIONONIORBYGASINJECTIONINLOWPER2MEABILITYOILRESERVOIRGUOPing(SouthwestPetroleumInstitute,NanchongSichuan637001,China),LIShiOlun,DUZhiOmin,etal.JOURNALOFSOUTHWESTPETROLEUMINSTITUTE,VOL.24,NO.5,46-50,2002(ISSN1000-2634,INCHI2NESE)The21stcenturyisthenaturalgascenturywiththein2creaseofnaturalgasreserveandproductiononalargescale.Ontheotherhand,theproportionofthereservehardtodevelopduetolowpermeabilityincreasesastheoilandgasexplorationanddevelopmentfurthersindepth.Itisestimatedthattherearearound1.8ObillionOtonoilleftinundergroundduetolowpermeabilitywithinCNPC.Becauseoflowpermeability,waterfloodingandnormalEORmethodsaregreatlylimited.Fortu2nately,alargenumberofgasresourceshasbeenfound,whichprovidegasenoughtocarryoutgasOinjectiontoenhanceoilre2covery.Inthispaper,thecharacteristicsoflowpermeabilityreservoirandthepresentsituationofgasOinjectiontoenhanceoilrecoveryinthelowpermeabilityreservoirinourcountryandabroadareanalyzedindetail.Then,thepointsandsuggestionswhenconductinggasOinjectionarepresented,whichhavesignif2icantguidanceindevelopinglowpermeabilityreservoirsinourcountry.Keywords:lowpermeability;oilreservoir;gasinjection;oilrecoveryDETERMINATIONOFREASONABLEWATERINJECTIONRATEBYUSINGCAPILLARYPRESSURECURVETANGHai(SouthwestPetroleumInstitute,NanchongSichuan637001,China),YANGXiaoObei,MAXiaoOming,etal.JOURNALOFSOUTHWESTPETR