68827.地震子波零相位化與反褶積

1、青島海洋大學(xué)博士學(xué)位論文地震子波零相位化與反褶積姓名：劉金俊申請學(xué)位級別：博士專業(yè)：海洋地質(zhì)指導(dǎo)教師：徐世浙王修田2000.4.1ZEROPHASINGTHESEISMICDATAANDDECoNVoLUTIONAbstractThewaveletphasespectrumeliminationmethodproposedinthispaperisanewseismicdataprocessingmethodwhichcanmaketh

2、ephaseofthetracewavelettobezero，andalsoisadeconvolutionmethodthatfitstoanywaveletnomatterwhatkindofphaseitisThismethodeanalsoobtainthewaveletofaseismictraceTomaketheseismictracetobezerophasemeanstochangethenonzerophasewa

3、velettozerophasewaveletAtierbeingchangedtozerophasewavelet，theamplitudeofthewaveletbecomesbiggeranditcorrespondstothestratummorecorrectlysothiscanadvancetheresolutionoftheseismicrecordThewaveletphasespectrumeliminationme

4、tbodisanewmethodtomaketheseismictracetobezerophaseThespectrumofthewaveletisobtainedbythefactoranalysisofthewaveletspectrumandusingthemaximvarianeenormcriterlonasthediscriminationcriterionandthenitiseliminatedfromthatofth

5、eseismicrecordThismethoddoesn’trequirethespectrumofthewavelettobeaconstant，whichisnecessaryfortheAPCmethod；Comparedwiththewaveletphaseeliminationmethodthatwasusedbeforethismethoddoesn’trequirethephaseofthewavelettobemini

6、mum1’estbythemodelandthefielddataindicatesthatthismethodhasgoodeffectThismethodhasgoodstabilityandhasgoodadaptabilitytothefrequencychangeofthewaveletofthetracewhenthefrequencydifferenceofthefirstandthelastwaveletisasbigg

7、eras30hzitcanalsogetsagoodresultThismakesitconvenientforustoprocessthewholetracenotbysegmentationbutbyonceatimeWhenthewaveletofthetraceisminimumphaseormixedphasebutclosingtominimumphase，thismethodhasagoodnoiseresistantab

8、ili何Whenthewaveletofthetraceismaximumphaseormixed—phasebutelosingtomaximumphase，thismethodrequirethetracehaveahighers／nratioFromthefrequencydomain，wecanknowthatthegoalofthedeconvolutionprocessionistoeliminatethewaveletco

9、mponents，tomakethewaveletphasetobezeroisactuallyastepofthedeeonvolutionSo，afterthewaveletphaseofaseismictracehavebeenmadetobezero，wethendoanamplitudedeconvolution，thusthedeconvolutionisrealizedThismethodfitstoanywaveletn

10、omatterwhatkindofphaseitisThismethodcanalsoobtainthewaveletofaseismictraceTbstsbymodelsandfielddataindicatethatthismethodhasgoodeffectKeyWords：waveletphasespectrumscanningmethodzero，phasingseismicdatawaveletestimationdee