大地電磁測深偏移成像.pdf

1、分類號UDCy93乏73G學校代碼：10616密級學號：——成都理工大學碩士學位論文大地電磁測深偏移成像指導教師姓名及職稱阮帥王緒本教授申請學位級別碩士專業(yè)名稱地球探測與信息技術論文提交日期200605論文答辯日期200605學位授予單位和日期答辯委員會主席評閱人2006年5月ABSTRCTInthispaper，basedontheessentialMTtheorywehavemainlydiscussedthefoHowingthr

2、eeaspectsoftechnology：1MagnetoteUuricfieldphaseshiftmigrationtomographyWeintroducehowtoapplytheseismicphaseshiftmigrationintoMTinterpretationBasedon1Dsingleinterfaceand1Dmultiinterfacemodelphaseshiftmigrationweanalyzesev

3、eralsignificantfactorswhichaffecttheresultsofMTmigrationThentheprocessof2DMTphaseshiftmigrationisexpatiatedWealsousethePSPImethodinseismicmigrationtomakeitsuitableinmorecomplexgeoelectricsectionFinallybothadvantagesanddi

4、sadvantagesofthistechnologyareconcluded，SOwasthefoundationstonewhichbringsthesedisadvantages2MagnetotelluricfieldfinitedifferencemigrationtomographyFoundontheresearchesofZhdanovetcinMTfinitedifferencemigrationtomographyw

5、eanalyzeandsummarizebothfruitsandlimitationofforegonepeoples’achievementsSomoreprecisefinitedifferenceextrapolationequationCanbededuced，anditCanbeeasilyappfiedintothemigrationtomographyNewequationreservedthederivativeter

6、msofwavenumberbothatverticalandhorizontaldirection，SOthatmoreexquisitegeoelectricdiversificationcarlstillbeaccommodated，thatistheveryrequirementofpracticaldatainterpolation3ImprovementofMTmigrationtomographytechnologyBas

7、edontheimmanentrelationshipbetweentomographypurposeandsuitablefrequencysegmentselection，weraiseanentire丹equencysegmentmulti。parametertomographyschemeofMTfinitedifferencemigrationWeestablishamathematicalrelationshipamonga

8、pparentelectromagnetismreflectance，migrationreflectance，backgroundresistivityandthetrueresistivitydistributionAftertheintroductionofTE／TMmodesuperposerate，wecarryouttheassociatedresistivitytomographyoftwopolarizationmode

9、toadaptthepracticaldatainterpolatingsituationUltimatelywecomparethecharacteristicsofphaseshiftmigrationandfinitedifferencemigration；contrastthedifferencesbetweenmigrationandcommoninversion；analyzeseveralsignificantfactor