陣列側(cè)向測井反演研究.pdf

1、西安石油大學(xué)碩士學(xué)位論文陣列側(cè)向測井反演研究姓名：謝尉尉申請學(xué)位級別：碩士專業(yè)：測試計(jì)量技術(shù)及儀器指導(dǎo)教師：仵杰20080520Subject：Speciality：Name：Instructor：AStudyonInversionofArrayLaterologLoggingTechnology＆InstrumentsofTestandMeasurementXieWeiwei(signaWuJie(signatureABSTRAC’I

2、’TheArrayLaterologLoggingtool(ALL)carlprovide56loggingcurvesthathavedifferentinvestigationdepthsTheycontainnumerousdowninformationDuetotheborehole，invasionthemeasureddataCallnotdirectlyusetoevaluatereservoiroftheoilorgas

3、Therefore，theproblemhowtoinvertformationparameterfromthemeasurementmustbesolvedinthetooldesign，developmentandapplicationThethesisstudiesindetailtheinversionformationparameterfromtheALLdataBasedontllefunctionalextremumpri

4、ncipleandtheworkingmodelofALL，wewriteacodetocomputetheloggingresponseusingtheFiniteElementMethod(FEM)underthedi最rent2DstratummodelsWeanalyzethetoolcharacteristicsincludingtoolconstant，pseudogeometricalfactor，andboreholec

5、orrect，anddiscusstheeffectontheloggingresponseTheefleethasthechangeofthetargetzonethicknessandinvasionradiusinthehighorlowiIlvasionmodelsTheseresultsprovidethebasisoftheextractingtheaprioriinformationforbelowinversionRes

6、earchingonthecommonlinearinversiontheoryandestablishingthecommonloggingirlversionmodel。welinearizethenonlinearinversionproblem，usesingularvaluedecotoposition(SVD)tosolveJacobimatrix，andchooseMarquardtmethodasthealgorithm

7、forALLinversionproblem，discusshowchoosethedampingfactorthefinalistocompileprogranlInordertOgetthebestsolution，studyontheanalysisofthetooloriginalresponse，thedivisionoflayerandestimationoftheinitialparametersTheJacobimatr

8、ixistransformedintologarithmformaccordingthedifferentchangingrangeoftheparameterForinversionofthefonnationresistivityinvasionresistivityandradius，threeinversionmodelsarestudiedThenatureofALLinversionisanalyzedthroughthen