Titlebook: Electromagnetic Depth Soundings; L. L. Vanyan,L. Z. Bobrovnikov,E. I. Terekhin Book 1967 Consultants Bureau 1967 ETA.Matching.behavior.bou

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Electrical Prospecting with the Transient Magnetic Field Method,In sedimentary basins in a number of regions of the country (as for example, the Volga—Ural platform), which are potentially productive of oil reserves, there are broad areas where evaporite beds and carbonates with high electrical resistivity occur within the section.

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Fundamentals of Electromagnetic Sounding,The application of electromagnetic sounding methods is based on differences in the electrical properties of various rocks, such as the electrical resistivity, ρ, and the dielectric constant, ε.

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Concerning the Factors Distorting Frequency Sounding Curves,In recent years, new techniques based on the study of nonstationary electromagnetic fields (frequency sounding method, ChZ, and transient method, ZS) have been widely used in applied electrical exploration.

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Oertlich wirkende Mittel, Topicaharacter. These distortions are most severe in the left-hand segments of the curves, and may substantially increase or decrease the value of ρ. computed for small times. In extreme cases, the value for ρ. computed for the left-most segment of the transient coupling curve may be negative (this part o

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Four-Layer Master Curves for Frequency Electromagnetic Sounding,. L. Vanyan and G. M. Morozova at the Computer Center of the Siberian Department of the Academy of Sciences of the USSR, and prepared for publication by E. I. Terekhin and A.I. Shtimmer at the All-Union Research Institute for Applied Petroleum Geophysics.

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