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Russian Geology and Geophysics

2010 year, number 3

TEM-TDEM SOUNDINGS WITH THE USE OF VERTICAL LOOPS

V.S. Mogilatov and A.Yu. No
A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia
Keywords: TEM-TDEM method, horizontal magnetic dipole, vertical loop, simulation
Pages: 322-327

Abstract

In the course of scientific collaboration, we were involved in discussion on the capacity of a vertical loop configuration to resolve thin high-resistivity layers, which is quite an interesting and largely debated point. We report a small forward modeling study including an algorithm based on an analytical solution by separation of variables and a respective program for computing the time-domain TEM field of a horizontal magnetic dipole. We infer that the subsurface vertical loop system shows no critical advantage in resolving thin insulating inclusions.