Transient electromagnetic step response acquisition method

A transient electromagnetic and step response technology, applied in the field of geophysical exploration, can solve problems such as the reduction of exploration accuracy, and achieve the effects of improving exploration accuracy, easy implementation, and simple operation
CN114355458APending Publication Date: 2022-04-15XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
Publication Date
2022-04-15

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Abstract

The invention provides a transient electromagnetic step response acquisition method, which comprises the following steps of: performing full-time sampling and recording on any transient electromagnetic emission waveform and response to obtain transient electromagnetic full waveform and transient electromagnetic full waveform response; discretizing the transient electromagnetic arbitrary transmitted waveform by adopting a pulse waveform, and obtaining a relational expression of transient electromagnetic arbitrary waveform response and transient electromagnetic step response after concluding and recurring a discretized result; transient electromagnetic arbitrary waveform response can be converted into step waveform response by adopting the relational expression. According to the method for acquiring the transient electromagnetic step response, the transient electromagnetic step response under an ideal condition can be acquired, so that the exploration precision is improved.
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Description

technical field

[0001] The invention belongs to the technical field of geophysical exploration and relates to transient electromagnetics, in particular to a method for acquiring transient electromagnetic step responses. Background technique

[0002] The transient electromagnetic method is an exploration method that observes the transient electromagnetic secondary magnetic field signal during the period when the transmitting current is turned off by passing the transmitting current into the ground transmitting loop. Due to the advantages of high construction efficiency and good exploration effect, the transient electromagnetic method has been widely used by geophysicists at home and abroad in fields such as coal fields, metal mines, and geological surveys. From a theoretical analysis, in the process of using the transient electromagnetic method for exploration, the faster the emission current is turned off, the more the measured response after the shutdown is in line with the...

Claims

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