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一种基于局部倾角估计的倾角域绕射波分离与成像方法 Title:ALocalDipEstimation-basedMethodforSeparationandImagingofDip-angleDomainDiffractionWaves Abstract: Inseismicexploration,theabilitytoaccuratelyseparateandimagediffractionwavesiscrucialforreservoircharacterizationandundergroundstructuredelineation.Thispaperproposesanovelmethodfortheseparationandimagingofdip-angledomaindiffractionwavesbasedonlocaldipestimation.Themethodutilizestheconceptofdipandidentifiesthelocaldipdistributionintheseismicdata,whichisthenemployedtoseparatethediffractionwavesfromthebackgroundnoiseandotherseismicreflections.Subsequently,theseparateddiffractionwavesareimagedusinganadaptiveimagingalgorithm,facilitatinginterpretablesubsurfaceimaging. 1.Introduction: Diffractionisacommonseismicphenomenonthatprovidesvaluableinformationaboutsubsurfacestructures.However,theaccuratedetectionandimagingofdiffractionwavesarechallengingduetotheirweakamplitudesandinterferencewithotherseismicreflections.Existingmethodsoftenstruggleindistinguishingdiffractionwavesfromnoiseandreflectionsfromotherseismicevents.Therefore,thedevelopmentofeffectivemethodsfordiffractionseparationandimagingiscrucial. 2.BackgroundandRelatedWork: Numerousmethodshavebeenproposedtoaddressthediffractionseparationproblem,includingtraditionalfilter-basedapproaches,machinelearningalgorithms,andmodel-driventechniques.However,thesemethodsoftenrequirepriorinformationaboutthediffractioneventsorhavelimitationsinhandlingcomplexsubsurfaceconditions. 3.LocalDipEstimation-basedMethod: Ourproposedmethodisinspiredbytheconceptofdip,whichcharacterizesthelocalangleofchangebetweenneighboringseismicevents.Thefollowingstepsoutlineourmethodology: a)LocalDipEstimation:Theseismicdataisprocessedusingalocaldipestimationalgorithmthatcalculatesthedipvalueateachsamplepoint,providingadetaileddipmap. b)Dip-angleDomainSeparation:Thelocaldipmapisusedtoseparatethediffractionwavesfromotherseismicreflections,utilizingthefactthatdiffractioneventsexhibitdistinctivedip-angleresponses. c)AdaptiveImaging:Th