可控源音频大地电磁测深最小构造反演的中期报告摘要：地球物理勘探中，大地电磁测深技术是一种非常重要的方法，用于研究地下物质的电导率分布。在大地电磁测深的实测中，源音频的不可控性导致测量误差，因此需要利用可控源音频进行测深。本文旨在研究可控源音频大地电磁测深的最小构造反演方法，并进行中期报告。首先，介绍了可控源音频大地电磁测深的基本原理和反演方法，包括最小构造反演和正则化反演两种方法。针对最小构造反演方法的优点和局限性，提出了加权最小构造反演方法。然后，应用该方法对模拟数据进行了反演实验。经过分析和对比，得出了反演结果并验证了方法的可行性和有效性。最后，根据反演结果，讨论了模型参数对反演效果的影响，并对进一步研究进行了展望。关键词：大地电磁测深；可控源音频；最小构造反演；加权最小构造反演Abstract:Ingeophysicalexploration,themethodofmagnetotelluric(MT)soundingisanimportantmethodforstudyingthedistributionofundergroundmaterialconductivity.Intheactualmeasurementofmagnetotelluricsounding,theuncontrollabilityofthesourceaudiofrequencyleadstomeasurementerrors,whereuponthecontrolled-sourceMTsoundinghasbeendeveloped.Thispaperaimstostudytheminimumstructureinversionmethodofcontrolled-sourceMTsoundingandtoreportthemid-termresults.Firstly,thebasicprinciplesandinversionmethodsofcontrolled-sourceMTsoundingwereintroduced,includingminimumstructureinversionandregularizationinversion.Inviewoftheadvantagesandlimitationsoftheminimumstructureinversionmethod,aweightedminimumstructureinversionmethodwasproposed.Then,theinversionexperimentwascarriedoutusingtheproposedmethodonsimulateddata.Afteranalysisandcomparison,theinversionresultswereobtainedandthefeasibilityandeffectivenessofthemethodwereverified.Finally,basedontheinversionresults,theeffectofmodelparametersontheinversioneffectwasdiscussedandtheprospectsforfurtherresearchwerepresented.Keywords:magnetotelluricsounding;controlled-source;minimumstructureinversion;weightedminimumstructureinversion