Analysis of 2D MT inversion in approximately explaining 3D model

PreviousNext No AccessInternational Workshop and Gravity, Electrical & Magnetic Methods and their Applications, Chenghu, China, 19-22 April 2015Analysis of 2D MT inversion in approximately explaining 3D modelAuthors: Gengen QiuHui FangQing ZhongXiaobo ZhangFagen PeiYongzhen YuanGengen QiuInstitute of Geophysical and Geochemical Exploration, Langfang, Hebei, ChinaSearch for more papers by this author, Hui FangInstitute of Geophysical and Geochemical Exploration, Langfang, Hebei, ChinaSearch for more papers by this author, Qing ZhongInstitute of Geophysical and Geochemical Exploration, Langfang, Hebei, ChinaSearch for more papers by this author, Xiaobo ZhangInstitute of Geophysical and Geochemical Exploration, Langfang, Hebei, ChinaSearch for more papers by this author, Fagen PeiInstitute of Geophysical and Geochemical Exploration, Langfang, Hebei, ChinaSearch for more papers by this author, and Yongzhen YuanInstitute of Geophysical and Geochemical Exploration, Langfang, Hebei, ChinaSearch for more papers by this authorhttps://doi.org/10.1190/GEM2015-117 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract There are a series of problems in approximately explaining 3D geological model by using MT 2D inversion methods. This paper designed multiple 1D/3D, 2D/3D models for numerical simulation, we analyzed the response differences inspired by three-dimensional model and corresponding two-dimensional model, as well as their inversion results. Experiments and research results show that: the two dimension feature requirements of TM polarization mode is far lower than TE polarization mode; Through the study of the numerical simulation of multiple models, we found that model of three-dimensional features enhanced gradually in the process of the abnormal body shorten along the strike length. The inversion results of using TM polarization mode remain unchanged, while the inversion results of TE polarization mode produce distortion gradually. Company inversion effect of TE/TM polarization mode is usually between the former two, sometimes is better than TM polarization mode inversion results. So we get comprehensive conclusion: according to the general geological situation, using the 2D inversion results of TM polarization mode can often be better reconstruction of the original model. Under the condition of overall electrical structure inversion results between TE/TM company inversion and TM polarization inversion are similar, sometimes the inversion result of TE/TM company inversion may be superior to result of TM polarization mode. The inversion results of TE polarization mode are usually prone to distortion. Keywords: 2D, magnetotelluric, inversion, polarization Permalink: https://doi.org/10.1190/GEM2015-117FiguresReferencesRelatedDetails International Workshop and Gravity, Electrical & Magnetic Methods and their Applications, Chenghu, China, 19-22 April 2015ISSN (online):2159-6832Copyright: 2015 Pages: 520 publication data© 2015 Published in electronic format with permission by the Society of Exploration Geophysicists and the Chinese Geophysical SocietyPublisher:Society of Exploration Geophysicists HistoryPublished Online: 22 Apr 2015 CITATION INFORMATION Gengen Qiu, Hui Fang, Qing Zhong, Xiaobo Zhang, Fagen Pei, and Yongzhen Yuan, (2015), "Analysis of 2D MT inversion in approximately explaining 3D model," SEG Global Meeting Abstracts : 450-453. https://doi.org/10.1190/GEM2015-117 Plain-Language Summary Keywords2Dmagnetotelluricinversionpolarization PDF DownloadLoading ...