基于一阶速度-胀缩-旋转方程的纵横波地震偏移角度域共成像点道集提取方法（英文）.docx

基于一阶速度-胀缩-旋转方程的纵横波地震偏移角度域共成像点道集提取方法（英文）
Title:Angle-domainCoherentImagingofShot-recordGatherofPandSWavesbasedonFirst-orderVelocity-Scaling-RotatingEquation
Abstract:
Waveforminversionplaysavitalroleinseismicimagingandhasbeenwidelyappliedtoextractsubsurfacestructuresandproperties.Inthisstudy,weproposeanovelmethodforangle-domaincoherentimagingofshot-recordgatherbasedonthefirst-ordervelocity-scaling-rotatingequation.Byincorporatingthewaveequationswithseismicdata,weaimtoextractimagingpointgatherofPandSwavesaccurately.Theproposedmethodisappliedtosyntheticandfielddatatodemonstrateitseffectivenessandreliability.Theresultsshowthattheproposedmethodprovidesrobustandaccurateimagingofsubsurfacestructures.
1.Introduction
Seismicimagingisafundamentaltechniqueusedingeophysicsforidentifyingsubsurfacestructuresandproperties.Waveforminversionmethodshaveshowngreatpotentialinprovidinghigh-resolutionimagesfromseismicdata.However,accurateimagingofseismicdataischallengingduetolimiteddataquality,complexwavepropagation,andotherfactors.Theangle-domainimagingtechniquehasemergedasapowerfultoolforimprovingseismicimagingqualityandresolution.Thispaperpresentsanovelmethodforangle-domaincoherentimagingofshot-recordgatherusingthefirst-ordervelocity-scaling-rotatingequation.
2.Theory
Theproposedmethodisbasedonthefirst-ordervelocity-scaling-rotatingequation.Bysolvingthisequation,wecanobtainthecoherentimagingpointgatherofPandSwaves.Thewaveequationsareincorporatedwiththeseismicdatatoaccuratelyextractthesubsurfacestructures.Thevelocity-scaling-rotatingequationaccountsfortheeffectsofwavevelocity,scaling,androtation,resultinginimprovedimagingaccuracy.
3.Methodology
Theangle-domaincoherentimagingmethodconsistsofseveralsteps.First,theshot-recordgatherdataarepreprocessedtoremovenoiseandenhancethesignal-to-noiseratio.Then,thefirst-ordervelocity-scaling-rotatingequationisappliedtothepreprocesseddatatoobtainthephase-shiftmigrations.Thephase-shiftmigrationsarethencombinedtoformtheangle-domaincoherentimagingpointg