简介：Forthethree-dimensionalcompressiblemulticomponentdisplacementproblemweputforwardthemodifiedmethodofcharacteristicswithfiniteelementoperator-splittingproceduresandmakeuseofoperator-splitting,characteristicmethod,calculusofvariations,energymethod,negativenormestimate,twokindsoftestfunctionsandthetheoryofpriorestimatesandtechniques.OptimalorderestimatesinL^2normarederivedfortheerrorintheapproximatesolution.Thesemethodshavebeensuccessfullyusedinoil-gasresourcesestimation,enhancedoilrecoverysimulationandseawaterintrusionnumericalsimulation.
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