About the journal
NAUKA I TEKHNOLOGICHESKIE RAZRABOTKI (SCIENCE AND TECHNOLOGICAL DEVELOPMENTS), ISSN: 2079-5165, eISSN: 2410-7948, DOI: 10.21455/std; https://elibrary.ru/title_about.asp?id=32295; http://std.ifz.ru/. The journal was founded in 1992.
The
technique of quantitative estimation
of the static shift
distortion with the use
of magnetic field of controlled source
A.A. Zhamaletdinov1,2
1
St.
Petersburg Branch of Pushkov Institute of Terrestrial Magnetism,
Ionosphere and Radio Wave Propagation
Russian Academy of
Sciences (IZMIRAN), St. Petersburg, Russia
2
Geological Institute FRC “Kola Science Center of the Russian
Academy of Sciences”,
Murmansk region, Apatity, Russia
e-mail: abd.zham@mail.ru
Highlights
– The analysis of the known methods of accounting for static shift is carried out.
– A new method is proposed for taking into account static shift based on measurements of apparent resistivity by the total magnetic field of a control source.
– The theoretical justification of the new method.
– An experimental substantiation of a new method for accounting for static shift is given on the example of control source soundings.
Abstract. Static distortions are known abroad under the term “static shift distortions”. They have a strong influence on the results of deep electromagnetic soundings with both natural (AMT-MTS) and control (CSAMT) sources. The main cause of static distortion is the local, in comparison with the electromagnetic wavelength in the ground, heterogeneity of the upper half-space. Static distortion is frequency-independent in nature and manifests itself in a parallel shift of the apparent electrical resistivity curves relative to the resistivity scale. Moreover, the shape of the apparent resistivity, non-existent information about the model of the section, is preserved, but ideas about the depths of the location of the layers and about the magnitude of their electrical conductivity change. To date, many methods have been developed to account for static shift. But they all have a qualitative, phenomenological character. In this paper, a quantitative method for correcting staticshift distortions is proposed. The technique is based on the use of the apparent resistivity curve of a control source, normalized by the value of the total horizontal magnetic field. The use of magnetic measurements with induction coils that do not have a galvanic connection with the Earth allows one to quantitatively calculate static shift distortions by comparing the magnetic field with apparent resistance curves normalized by the total electric field or by the value of the total input impedance. The proposed methodology is applicable only for control source frequency soundings of CSAMT. Nevertheless, it allows you to correct the MTS and AMT curves measured on the same setup and with the same sensors in the low-frequency region, outside the wave zone, where the CSAMT method loses its sounding functions. The results of experimental work are presented that justify the applicability of the new method on the example of control source soundings.
Keywords: sounding, controlled sources, static shift distortion, Baltic shield
Cite this article as: Zhamaletdinov A.A. The technique of quantitative estimation of the static shift distortion with the use of magnetic field of controlled source, Nauka i Tekhnologicheskie razrabotki (Science and Technological Developments). 2019, vol. 98, no. 4, pp. 5–18. [Special issue “Methodological developments for electromagnetic controlled source soundings”]. [in Russian]. https://doi.org/10.21455/std2019.4-1
References
Barannik M.B., Danilin A.N., Efimov B.V., Kolobov V.V., Prokopchuk P.I., Selivanov V.N., Shevtsov A.N., Kopytenko Yu.A., Zhamaletdinov A.A. High-voltage power inverter of the generator “Energy-2” for electromagnetic soundings and monitoring of the earthquake source zones, Seismic Instruments, 2010, vol. 46, no. 1, pp. 49–61, https://doi.org/10.3103/ S0747923910010068
Barannik M.B., Danilin A.N., Efimov B.V., Kolobov V.V., Prokopchuk P.I., Selivanov V.N., Kopytenko Yu.A., Zhamaletdinov A.A. High-voltage rectifier of the Energy-2 generator for electromagnetic sounding and monitoring of earthquake source zones, Seismic Instruments, 2010, vol. 46, no. 3, pp. 207–212, https://doi.org/10.3103/S0747923910030011
Berdichevsky M.N. Electrical intelligence by magnetotelluric profiling. Moscow, Nedra, 1968. 255 p.
Caldwell T.G., Bibby H.M., Brown C. The magnetotelluric phase tensor, Geophys. J. Int., 2004, vol. 158, no. 2, pp. 457–469, https://doi.org/10.1111/j.1365-246X.2004.02281.x
Feldman I.S., Okulessky B.A., Ingerov A.I., Solodilov L.N., Egorkin A.V., Kadurin I.N., Konovalov Y.F., Shempelev A.G., Trofimenko E.A. Magnetotelluric and seismic study of the Earth crust and upper mantle in the Caucasus region, 12th Workshop “Induction electromagnetique dans la terre”. Brest: Univ. de Bretagne, France, 1994. pp. 65.
Groom R.W., Bailey R.C. decomposition of magnetotelluric impedance tensors in the presence of local tree-dimensional galvanic distortion, J. Geophys. Res., 1989, vol. 94, no. B2, pp. 1913–1925.
Groot-Hedlin C., Constable S. Occam’s inversion to generate smooth, two-dimensional models from magnetotelluric data, Geophysics, 1990, vol. 55, no. 12, pp. 1613–1624.
Jones A.G. Static shift of magnetotelluric data and its removal in a sedimentary basin environment, Geophysics, 1988, vol. 53, no. 7, pp. 967–978.
Kolobov V.V., Kuklin D.N., Shevtsov A.N., Zhamaletdinov A.A. The KVVN-7 multifunction digital measuring station for electromagnetic monitoring of seismoactive zones, Seismic Instruments, 2012, vol. 48, no. 1, pp. 75–84, https://doi.org/10.3103/S0747923912010069
Kolobov V.V., Barannik M.B., Efimov B.V., Zhamaletdinov A.A., Shevtsov A.N., Kopytenko Yu.A. Energy-4 Generator for monitoring seismically active regions and electromagnetic sounding of the Earth’s crust. Experience of application in the Kovdor-2015 Experiment, Seismic Instruments, 2018a, vol. 54, no. 3, pp. 268–280, https://doi.org/10.3103/ S0747923918030143
Kolobov V.V., Barannik M.B., Ivonin V.V., Selivanov V.N., Zhamaletdinov A.A., Shevtsov A.N., Skorokhodov A.A. Experience of generator “Energy-4” application for the distance and frequency electromagnetic soundings in the experiment “Murman-2018”, Proceedings of Kola Science Centre of RAS, 2018b, no. 17, pp. 7–20, https://doi.org/10.25702/KSC.2307-5252.2018.9.8.7-20
Rokityansky I.I. Deep magnetotelluric sounding in the presence of distortions from horizontal inhomogeneities, Geophysical collection, Kiev: Naukova Dumka, 1971, issue 43. pp. 71–78.
Shevtsov A.N. About some methods of normalization and transformation of the results of electromagnetic soundings, Deep geoelectric studies using industrial power lines. Apatity, 1989. pp. 90–95.
Vanyan L.L. Principles of electromagnetic soundings. Moscow: Nedra, 1965. 107 p.
Veshev A.V. Electroprofiling on direct and alternating current. Leningrad: Nedra, 1980. 391 p.
Zhamaletdinov A.A. Model of electrical conductivity of lithosphere by results of studies with controlled sources (Baltic shield, Russian platform). Leningrad: Nauka, 1990. 159 p.
Zhamaletdinov A.A. Theory and methodology of deep electromagnetic soundings with powerful controlled sources (critical analysis experience). St. Petersburg: Publishing House of St. Petersburg State University, 2012. 163 p. ISBN 978-5-98340-271-0
Zhamaletdinov A.A., Shevtsov A.N. On the concept of the wave zone for deep sounding in the ELF-VLF range, Interaction of electromagnetic fields of the ELF-VLF range with the ionosphere and the Earth's crust, Materials of the 1st All-Russian (with international participation) Scientific and Practical Seminar. Apatity, 2015. pp. 25–32. ISBN 978-5-902643-32-6
Zhamaletdinov A.A., Shevtsov A.N., Velikhov E.P., Skorokhodov A.A., Kolesnikov V.E., Korotkova T.G., Ryazantsev P.A., Efimov B.V., Kolobov V.V., Barannik M.B., Prokopchuk P.I., Selivanov V.N., Kopytenko Yu.A., Kopytenko E.A., Ismagilov V.S., Petrishchev M.S., Sergushin P.A., Tereshchenko P.E., Samsonov B.V., Birulya M.A., Smirnov M.Yu., Korja T., Yampolski Yu.M., Koloskov A.V., Baru A., Poljakov S.V., Shchennikov A.V., Druzhin G.I., Jozwiak W., Reda J., Shchors Yu.G. Study of interaction of ELF–ULF range (0.1–200 Hz) electromagnetic waves with the Earth’s crust and the ionosphere in the field of industrial power transmission lines (FENICS Experiment), Izvestiya, Atmospheric and Oceanic Physics, 2015, vol. 51, no. 8, pp. 826–857, https://doi.org/10.1134/S0001433815080083
Zhamaletdinov A.A., Velikhov E.P., Shevtsov A.N., Kolobov V.V., Kolesnikov V.E., Skorokhodov A.A., Korotkova T.G., Ivonin V.V., Ryazantsev P.A., Birulya M.A. The Kovdor-2015 Experiment: Study of the parameters of a conductive layer of dilatancy–diffusion nature (DD Layer) in the Archaean Crystalline Basement of the Baltic Shield, Doklady Earth Sciences, 2017, vol. 474, no. 2. pp. 641–645, https://doi.org/10.1134/S1028334X17060095
Zhdanov M.S. Electrical prospecting. Moscow: Nedra, 1986. 316 p.
About the author
ZHAMALETDINOV Abdulkhai Azymovich – Chief Researcher, St. Petersburg Branch of Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation Russian Academy of Sciences. 199034, St. Petersburg, Universitetskaya nab., 5, lit. B; Chief Researcher, Geological Institute FRC “Kola Science Center of the Russian Academy of Sciences”. 184209 Apatity, Murmansk region, st. Fersman, 14. E-mail: abd.zham@mail.ru