Testing of low contrast object by resistivity

A. Zlobinskiy, V. Mogilatov

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Abstract

Testing of low-contrast resistivity objects is a difficult problem for electromagnetic methods. If we identify electrical exploration with electrical exploration of TE-polarization, i.e. electromagnetic methods that uses classical sources of the electromagnetic field - a loop or a horizontal line, the problem really looks insoluble. We can suggest the solution of the problem on the other hand - use a circular electric dipole as the source of the electromagnetic field, and excite only the electromagnetic field of the TM polarization in the medium. When electromagnetic field in the medium is only the TM polarization then on the surface will be magnetic field from various three-dimensional objects only. Three-dimensional objects have differences by some electrodynamic parameters with a horizontally layered medium. Anomalous field, as our experience shows, significantly exceeds the field calculated by classical models, using only anomalies of specific isotropic resistance. Such an anomalous field can be interpreted by complicating the generally accepted model, and introducing additional electrodynamic parameters into the calculations. The large anomalous field, which is created not only by a change in the specific isotropic resistance, allows us to confidently solve the problem of identifying three-dimensional objects that are not solvable for the classic TE-polarization.

Translated title of the contributionВыявление слабоконтрастных по удельному сопротивлению объектов
Original languageEnglish
Title of host publicationTyumen 2019
Subtitle of host publication6th Conference
PublisherEuropean Association of Geoscientists and Engineers, EAGE
ISBN (Electronic)9789462822801
DOIs
Publication statusPublished - 1 Jan 2019
Event6th Scientific Conference - Tyumen 2019 - Tyumen, Russian Federation
Duration: 25 Mar 201929 Mar 2019

Publication series

NameTyumen 2019: 6th Conference

Conference

Conference6th Scientific Conference - Tyumen 2019
CountryRussian Federation
CityTyumen
Period25.03.201929.03.2019

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