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Determination system containing magnetosphere-shaped dielectric electromagnetic response

An electromagnetic and medium technology, applied in the application field of extracting petrophysical information, can solve problems affecting the accuracy of data processing and interpretation

Inactive Publication Date: 2016-10-26
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

Such a treatment method has little difference for those rock minerals with paramagnetic or diamagnetic; but for those minerals with ferromagnetic or superparamagnetic, when an external magnetic field acts on it, a stronger additional magnetic field will be generated, And recorded by the receiving device, if these changes brought about by the magnetic permeability are not considered, it will seriously affect the accuracy of the later data processing and interpretation (Ward and Hohamnn, 1991)

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  • Determination system containing magnetosphere-shaped dielectric electromagnetic response
  • Determination system containing magnetosphere-shaped dielectric electromagnetic response
  • Determination system containing magnetosphere-shaped dielectric electromagnetic response

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Embodiment 1

[0064] Adopt above-mentioned system of the present invention, take magnetite as an example to illustrate. Assuming that the ferromagnetic mineral layer is located in the middle layer of the model, the resistivity is 0.001Ω.m, the thickness is 80m, the resistivity of the overlying formation is 1Ω.m, the thickness is 10m, and the base resistivity is 2Ω.m. Figure 6 The forward apparent resistivity curves for different relative permeability of the middle magnetic layer are given. It can be seen from the figure that since magnetite is an ore layer with extremely low resistivity, when μ r = 2, the position of the minimum value has been greatly moved, and when it reaches 8, the shape of the curve is obviously changed. At this time, if the magnetic layer is used as the detection target, it can be seen from the curve drawn above for the calculation results of the geofrequency bathymetric apparent resistivity of the layers containing the magnetic rock layer that the existence of the m...

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Abstract

The present invention discloses a determination system containing magnetosphere-shaped dielectric electromagnetic response. The system comprises an electromagnetic response analyzing module and an electromagnetic response numerical value calculation module, and has the positive theoretical and practical significance for identifying a magnetic anomaly effect in the field actual measurement controlled source audiofrequency magnetotelluric (CASMT) data and improving the data explanation precision.

Description

technical field [0001] The invention relates to a system for determining the electromagnetic response of a magnetic layered medium, and further relates to the application of using the system to extract rock physical property information. Background technique [0002] The electromagnetic method for exploration is to obtain the electrical information of the underground target by observing different types of electromagnetic signals to achieve the purpose of detection. The traditional electromagnetic method mainly considers one of the various physical properties of the rock, that is, the electrical conductivity. Most of the widely used electromagnetic field theory, exploration technology and data interpretation methods are formed on this basis. However, with the application of electromagnetic methods becoming more and more extensive, people have higher and higher requirements for exploration accuracy, and data interpretation based only on rock resistivity properties can no longe...

Claims

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Application Information

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IPC IPC(8): G01V3/08G01V3/38
CPCG01V3/08G01V3/38
Inventor 薛国强闫述周楠楠侯东洋
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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