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Long-lead source transient electromagnetic ground-air detecting method

A transient electromagnetic and detection method technology, applied in the field of geophysical exploration, can solve the problems of inability to obtain accurate and detailed geological information of deep geological targets, inability to accurately explore deep geological targets, and limited exploration accuracy, and achieve signal-to-noise High ratio, better signal-to-noise ratio, and better spatial resolution

Inactive Publication Date: 2012-04-18
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0007] However, the above-mentioned traditional transient electromagnetic sounding method has limited exploration accuracy and cannot realize accurate exploration of deep geological targets, so that accurate and detailed geological information of deep geological targets cannot be obtained

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Embodiment Construction

[0059] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0060] One of the core ideas of the present invention is that the invention provides a long wire source transient electromagnetic ground-space detection method, which is a new type of transient electromagnetic sounding method, which can accurately explore deep geological targets, thereby obtaining deep geological targets Accurate and detailed geological information of the body to achieve the purpose of finding various deep geological targets.

[0061] refer to figure 1 , which shows a flow chart of an embodiment of the long wire source transient electromagnetic ground-space detection method of the present invention, which may specifically include:

[0062] Step 101, using the working device of the long wire source transient elect...

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Abstract

The invention provides a long-lead source transient electromagnetic ground-air detecting method which comprises the following steps of: detecting a deep geologic target body by a working device adopting a long-lead source transient electromagnetic terra-air detecting method to obtain transient electromagnetic observing data; converting the transient electromagnetic observing data into transient electromagnetic virtual wave data and obtaining a transient electromagnetic synthetic aperture data volume by adopting a multipoint data synthesis method to finish data reserve for carrying out fine explanation on the deep geologic target body; and obtaining a transient electromagnetic synthetic aperture imaging profile by adopting a Kirchhoff offset imaging method and a speed modeling method and processing and explaining the transient electromagnetic synthetic aperture data volume to finish fine detection on the deep geologic target body and obtain the information of the deep geologic target body. The long-lead source transient electromagnetic ground-air detecting method can be used for carrying out accurate exploration on the deep geologic target body, thereby obtaining the accurate and detailed geologic information of the deep geologic target body so as to achieve the aim of searching various deep geologic target bodies.

Description

technical field [0001] The invention relates to the field of geophysical prospecting, in particular to a long wire source transient electromagnetic ground-space detection method. Background technique [0002] Transient Electromagnetic Field (TEM) is a time-domain artificial source electromagnetic detection method based on the principle of electromagnetic induction. It is excited by a step-shaped wave electromagnetic pulse, and uses an ungrounded return line or a grounded wire to emit a primary field underground. After the primary field is powered off, it measures the change of the induced secondary field generated by the underground medium over time to achieve the search. A geophysical prospecting method for various geological targets. [0003] The ground center loop type transient electromagnetic method device was used more in the early days. Because this device is generally simple and easy to explain, it has been widely used. When the side length is large (greater than 3...

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Application Information

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IPC IPC(8): G01V3/08
Inventor 薛国强李貅
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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