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基于迭代虚同相轴方法的叠后层间多次波衰减（英文）.docx

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基于迭代虚同相轴方法的叠后层间多次波衰减（英文） Title:IterativePseudocode-basedStackedPost-migrationInterbedMultipleAttenuation Abstract: Thefieldofseismicdataprocessingplaysacrucialroleininterpretingsubsurfacestructures,estimatingreservoirpropertiesandidentifyingpotentialhydrocarbonreservoirs.ThepresenceofinterbedmultiplesgeneratedwithintheEarth'ssubsurfaceposeschallengesforaccurateimagingandinterpretation.Thispaperpresentsaninnovativeapproachforattenuatinginterbedmultiplesinpost-migrationseismicdatausinganiterativepseudocode-basedmethod. 1.Introduction Seismicdataacquiredinhydrocarbonexplorationisoftencontaminatedwithinterbedmultiples,causingimagingdistortionsandreducingtheclarityofsubsurfacestructures.Accurateattenuationofthesemultiplesisessentialforobtainingreliableseismicimages.Conventionalmethodsoftenstruggletoeffectivelysuppressthem.Thispaperproposesanalternativeapproachbasedontheiterativepseudocode-basedmethodtoenhancepost-migrationdataquality. 2.Theory 2.1.IterativePseudocode-basedMethod Theiterativepseudocode-basedmethodhasbeensuccessfullyappliedinvariousfieldsandhasshownpromiseforattenuatinginterbedmultiples.Thismethodusesiterativestepsofmodeling,subtraction,andre-modelingtoiterativelyseparatetheprimaryreflectionsfrommultiplereflections,leadingtoimproveddataquality. 2.2.Stack-basedMigrationandPost-migration Stack-basedmigrationisawidelyusedtechniquetogenerateseismicimages.Itinvolvessummingseismictraces,eithercommonmidpointorcommonoffset,toenhancethesignal-to-noiseratio.Post-migration,theimagesareenhancedfurtherbyapplyingmigrationvelocityanalysisandpost-stackdepthmigration. 3.Workflow 3.1.Pre-processing Theseismicdataundergoesstandardpre-processingsteps,includingnoisereduction,traceinterpolation,andamplitudescaling. 3.2.Stack-basedMigration Stack-basedmigrationisappliedtogenerateaninitialimagethatservesasareferenceforsubsequentiterations. 3.3.MultipleModeling Multiplereflectionsaremodeledusingtheknownsubsurfaceinformationandthemigrationvelocityfield.Themultiplesareseparatedintop