1887

Abstract

This method is founded on the base of a three-staged conception for alternative electromagnetic and seismic (in the dynamical variant) field interpretation for 3-d high complicated medium [1]. For it's practical realisation it had been developed such theoretical and practical results: [2,3]: 1.It had been elaborated and practical realised a new common observation system for alternating electromagnetic and seismic fields with using a local source of excitation. The choice of the excitation source type had been stated by such features: a) common geometry of the normal field, b) absence of one or more components in the field, excited in the onedimensional medium. In the case of electromagnetic field such features can be achieved by an excitation source of vertical magnetic dipole type, in the case of seismic field – by a source of vertical strength type. The fact, that the chosen excitation source is local allows to provide a regular overlapping for a given observation net for different angles of directions excitation source - heterogeneity). As the input data for the interpretation we use three components of the elastic displacement field and three components of the magnetic field as a function of space coordinates and time. The analysis of the straight problem solution for seismic and electromagnetic cases shows that a common numerical approach is realisable for both fields if we preliminary convert the electromagnetic data to the real axis and seismic data on the image axis of the complex frequency plane. And the whole interpretation process must be provided on that plane, not returning to the time domain.

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/content/papers/10.3997/2214-4609.201406482
1999-09-06
2020-03-31
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201406482
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