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1、JournalofAppliedGeophysics109(2014)281–291ContentslistsavailableatScienceDirectJournalofAppliedGeophysicsjournalhomepage:www.elsevier.com/locate/jappgeoA3Dstaggered-gridfinitedifferenceschemeforporoelasticwaveequationYijieZhang,JinghuaiGao⁎InstituteofWaveandInformation,Xi'anJ

2、iaotongUniversity,710049Xi'an,ChinaNationalEngineeringLaboratoryforOffshoreOilExploration,710049Xi'an,ChinaarticleinfoabstractArticlehistory:Threedimensionalnumericalmodelinghasbeenaviabletoolforunderstandingwavepropagationinrealmedia.Received8May2014Theporoelasticmediacanbe

3、tterdescribethephenomenaofhydrocarbonreservoirsthanacousticandelasticAccepted16August2014media.However,thenumericalmodelingin3Dporoelasticmediademandssignificantlymorecomputa-Availableonline23August2014tionalcapacity,includingbothcomputationaltimeandmemory.Inthispaper,weprese

4、nta3Dporoelasticstaggered-gridfinitedifference(SFD)scheme.Duringtheprocedure,parallelcomputingisimplementedtoKeywords:reducethecomputationaltime.Parallelizationisbasedondomaindecomposition,andcommunicationbe-3DPoroelastictweenprocessorsisperformedusingmessagepassinginterface(

5、MPI).ParallelanalysisshowsthattheFinitedifferenceparallelizedSFDschemesignificantlyimprovesthesimulationefficiencyand3DdecompositionindomainMPIisthemostefficient.Wealsoanalyzethenumericaldispersionandstabilityconditionofthe3DporoelasticNumericaldispersionSFDmethod.Numericalresu

6、ltsshowthatthe3DnumericalsimulationcanprovidearealdescriptionofStabilityconditionwavepropagation.©2014ElsevierB.V.Allrightsreserved.1.Introductionimplemented.Themostefficientparallelimplementationsareoneswhichareoptimizedtobalancethecomputationalloadandmini-Seismicmodelinghas

7、beenlargelylimitedtothemediaofasin-mizethecommunicationbetweenprocessors.Thiscanbeeasilyglephaseelasticsolid.However,theenvironmentofhydrocarbonachievedforanexplicitSFDmethodbydomaindecompositionreservoirsisacompositemultiphasemediumwithgasand/or(Bohlen,2002;Sheenetal.,2006)

8、.Eachprocessorsolvestheproblemliquidoccupyingthevoidsbetweensolidgrains,whi