Poorly studied phenomena in geoelectrics
- Ph.D., Dr.Sci. Chief researcher A.A.Trofimuk Institute of Oil and Gas Geology and Geophysics, Siberian Branch
Abstract
Undoubtedly, modern geoelectric technologies emerge in the result of the development of traditional approaches and techniques. However of more interest is the appearance of completely new technologies based on new effects and new models of interaction of geological medium and electromagnetic field. The author does not commit to indicate principally new directions, but only wants to discuss some poorly known facts from the theory and practice of geoelectrics. The outcome of this study could be considered attracting the attention of experts to non-traditional signals in geoelectrics. The reviewed phenomena of interest, not fully implemented in practice in the author’s opinion, are field split into two polarizations: transverse electric (the ТЕ-field) and transverse magnetic (the ТМ-field), then some poorly known properties of ТМ-field, the role of bias currents, the anisotropy of horizontal resistances, the role of geomagnetic field in geoelectric sounding, the unique resolution of CSEM (Controlled Source Electro-Magnetic) techniques at sea.
References
- Ваньян Л.Л. Основы электромагнитных зондирований. М.: Недра, 1965. 109 с.
- Могилатов В.С. Импульсная геоэлектрика. Новосибирск: Изд-во НГУ, 2014. 182 с.
- Могилатов В.С. О влиянии геомагнитного поля на процесс установления токов в земле // Геофизика. 2013. № 4. C. 70-75.
- Могилатов В.С. Учет двухосной анизотропии проводимости среды в геоэлектрических исследованиях / В.С.Могилатов, А.Н.Беспалов // Изв. РАН. Сер. Физика Земли. 2009. № 9. С. 97-103.
- Тихонов А.Н. О становлении электрического тока в неоднородной среде / А.Н.Тихонов, О.А.Скугаревская // Изв. АН СССР. Сер. геогр. и геоф. 1950. Т. 14. № 4. С. 281-293.
- Bhattacharyya B.K. Electromagnetic fields of a transient magnetic dipole on the earth’s surface // Geophysics. 1959. 24. P. 89-108.
- Constable S. An introduction to marine controlled source electromagnetic methods for hydrocarbon exploration / S.Constable, L.J. Srnka // Geophysics, 2007. 72. WA3-WA12.
- Constable S.C. Ten years of marine CSEM for hydrocarbon exploration // Geophysics. 2010. Vol. 75 (5). P. 75A67-75A81.
- Displacement currents in geoelectromagnetic problems / V.Mogilatov, M.Goldman, M.Persova, Y.Soloveichik // Journal of Applied Geophysics. 2014. Vol. 105. P. 133-137.
- Signal detectability of marine electromagnetic methods in the exploration of resistive targets / M.Goldman, V.Mogilato, A.Haroo, E.Levi, B.Tezkan // Geophysical Prospecting. 2015. 63. P. 192-210.
- Wait J.R. Electromagnetic response of a thin layer // Electronics Letters. 1986. Vol. 22. N 17. P. 898-899.