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Russian Geology and Geophysics

2008 year, number 10

Improving inversion quality for IP-affected TDEM data

E.Yu. Antonov and A.N. Shein
Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the RAS, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia
Keywords: Induced polarization (IP); time-domain electromagnetic (TDEM) method; forward modeling and inversion
Pages: 790-802


We suggest new inversion techniques for IP-affected TDEM data. The method implies joint inversion of inductive and galvanic measurements, the galvanic array being configured in a way to separate the polarization and induction components of transient responses from a layered polarizable earth. The IP effects turned out to be reducible at a certain receiver configuration, which was predicted theoretically and proved valid in field tests.