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1、JournalofPetroleumScienceandEngineering50(2006)83–101www.elsevier.com/locate/petrolExperimentalandtheoreticalinvestigationoftheZaoyuanfieldheavyoilflowthroughporousmediaShaojunWanga,*,YanzhangHuangb,FarukCivancaObjectReservoir,4301WestbankDr.,BuildingB,Suite200,Austin,TX78746,USAbP.O.Box
2、44,Langfang,Hebei,P.R.ChinacMewbourneSchoolofPetroleumandGeologicalEngineering,TheUniversityofOklahoma,T301SarkeysEnergyCenter,100EastBoydSt.,Norman,OK,73019,USAReceived10November2004;receivedinrevisedform9June2005;accepted10June2005AbstractThebehavioroftheheavyoilintheZaoyuanfieldofChin
3、aischaracterizedbyexperimentalandtheoreticalstudiesofitsrheologyandviscoelasticity,andflowpropertiesinporousmedia.TheZaoyuanheavyoilrequiresacertainstart-uppressuregradientpriortoflowinitiationandessentiallyobeystheHerschel-Bulkleyrheologicalmodel.Theconventionalrheologicalexperimentsrev
4、ealthattheZaoyuanheavyoilhasaweakthixotropy.ThestaticviscoelasticexperimentsindicatethattheviscoelasticityoftheZaoyuanheavyoilweakenswithincreasingtemperature.Thedynamicviscoelasticexperimentsdemonstratethatthisheavyoilhasanonlinearviscoelasticproperty,increasingnonlinearlywithincreasing
5、shearrate.Theseobservationsarejustifiedinaccordancewiththeequationmotionoftheheavyoilforsteadyone-dimensionalradialflowthroughporousmedia,yieldinginformationabouttheheavyoilpressureprofileandflowrate.D2005ElsevierB.V.Allrightsreserved.Keywords:Heavyoil;Porousmedia;ZaoyuanfieldofChina;Rhe
6、ology;Viscoelasticity;Thixotropy;Start-uppressuregradient;Thresholdpressuregradient;Herschel-Bulkleymodel1.Introduction1996;Nghiemetal.,1998).OthersconcludedthatasphalteneissuspendedcolloidallyincrudeoilandTherateandultimaterecoveryofheavyoilfromhencethecrudeoil,containingsuspendedasphal
7、tene,petroleumreservoirsarestronglyaffectedbytheirflow-formsacolloidalsystem(LeontaritisandMansoori,ingcharacteristicsinporousrock.Frequently,heavy1987;Mansoori,1994,1997).Yenetal.(1961)studiedoilscontainsomeasphaltenes.Inspiteofmanystudies,asphaltenemicellesincrudeoilswi
