粘彈性介質(zhì)中提高地震資料分辨率方法研究.pdf

1、大慶石油學(xué)院碩士學(xué)位論文粘彈性介質(zhì)中提高地震資料分辨率方法研究姓名：鄭江峰申請學(xué)位級別：碩士專業(yè)：地球探測與信息技術(shù)指導(dǎo)教師：王云專裴江云20060315MethodologyandResearchonImprovingSeismicResolutioninViscoelasticMediaAbstractAsknowntoall。theattenuationeffectbyear也absorptioneaBSeSthehigh丘equ

2、encylossofseismicwave，thusdamagingseismicresolutionTllepapersteppedOUtfromtheviscoelsticwaveeqvationwhichcharacterizedattenuationbyearthabsorption，andworkedovertheabsorptioncompensationmethodbyinversescatteringimagingthe

3、oryandwavelettransform1nchapteronefirstlyaclassifiedintroductionofsomeconceptsandformulasaboutseismicresolutionwasgiven，andsomeopinionsanddiscussionwerefollowedaswell。Thensomeprocessingmethodsusedinpracticeforimprovingre

4、solutionofseismicdatawereintroduced，andtheperfectinversescatteringinragingmethodbasedonelasticWaveequationwasreviewedHowever，thismethodhasnoconsiderationofattenuationbyearthabsorption，thusrestrictingitsimagingresolutionF

5、inallysomemathematicmodelswhichcharacterizeattenuationbyearthabsorptionⅥ鍬introduced，andtheKetvinVoi【gtSOlidmodelwasselectedfortheresearehinfollowingchaptersoninversescatteringimaginginviscoelasticmediaFortheneedoftheoryd

6、eductionwavelettransformandsoineofitsmathematicpropertieswereintroducedinchaptertWOMakinguseofinversescatteringimagingtheoryandwavelettransform，formulasforinversescatteringimagingin1Dand3Dviscoetastiemediawerededucedresp

7、ectivelyinchapterthreeandfourandalsothecorrespondingcomputingprocessesweregivenInthelastchapter：firstlyatheoreticgeologicalmodelbasedonpracticalattenuationbyearthabsorptioninSongliaobasinwasbuilt，andseismicforwardmodelin

8、gbywaveequ破ionwascarriedOUI‘respectivelyintWOsituations，oneconsideredattenuationbyearthabsorptionandtheothernotThepropagationlawsseismicwaveobeysandthecharactersofattenu氌tionbyearthabsorptionwereshownupbycomparingsnapsho

9、tsofwavefieldandsyntheticseismogramsobtainedinthetwosituationsThenthesyntheticseismogramwasprocessedbyinversescatteringimagingformulastoimproveitsresolutionbycomparingtheresultwiththatobtmnedbyspectrumwhiteningandpredict

10、ivedeconvolution，thetheoryandmethodwereprovedtoberightandeffectiveFinallythismethodWasappliedtealdataprocessing，andquitegoodoutcomeWasobtainedKeywords：Viscoelasticmedia；Seismicresolution；Greenfimction；Inversescatteringim