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Directional transient electromagnetic device in drill hole and measurement method thereof

A transient electromagnetic and in-drilling technology, applied in the direction of electric/magnetic detection for well logging records, can solve the problems of less information, poor pertinence, misjudgment of geological structures and mine disaster sources, etc., to ensure The effect of quality and effect

Active Publication Date: 2012-02-15
ANHUI HUIZHOU GEOLOGY SECURITY INST
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Problems solved by technology

[0004] The purpose of the present invention is to provide a directional transient electromagnetic device and measurement method in a borehole, firstly to solve the problem that conventional logging methods cannot be used for all-round boreholes in underground space, resulting in uncontrollable drilling engineering quality The problem of misjudgment; secondly, the distribution of resistance value within a certain depth of the borehole wall and inside the borehole wall is solved, and the problem of understanding the lithology and its change of the borehole is achieved; finally, the traditional geophysical logging method has overcome the lack of information, Problems such as poor pertinence and limitation of drilling media

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  • Directional transient electromagnetic device in drill hole and measurement method thereof
  • Directional transient electromagnetic device in drill hole and measurement method thereof
  • Directional transient electromagnetic device in drill hole and measurement method thereof

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Embodiment Construction

[0024] Such as figure 1 , figure 2 , image 3 shown. The directional transient electromagnetic device in the borehole includes a DSP processing unit, an embedded CPU connected to the DSP processing unit, an electronic compass communicating with the embedded CPU through the RS232 interface, and an excitation receiving unit, which supplies power to the excitation receiving unit The excitation power supply and multi-frequency transmitter, the multi-channel A / D acquisition device that collects the output signal of the excitation receiving unit and transmits the signal to the DSP processing unit, the excitation receiving unit includes regular polygonal prisms, and the surfaces of the regular polygonal prisms are respectively provided with multiple turns Coil, and the number of turns of the multi-turn coil on each surface of the regular polygonal prism is the same, the excitation power supply is electrically connected to the multi-turn coils on each surface of the regular polygon...

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Abstract

The invention discloses a directional transient electromagnetic device in a drill hole and a measurement method thereof. A novel well logging system of a special transient electromagnetic detector in the drill hole is formed through combining a transient electromagnetic method with the omnibearing well logging technology. Transient electromagnetic field information of different bearings from random depth is provided for the drill hole, including induced potential and apparent resistivity parameters within a certain range of the hole wall of the drill hole and the interior of the hole wall. Byusing the device, well logging can be performed on the drill hole with a random filling medium. The directional transient electromagnetic device in the drill hole especially adapts to the well logging of dry holes, such as mine gas discharging holes, roadway drift boring drill holes and the like, can be used for performing imaging well logging on a geological occurrence state within the range of the drill hole, and can be used for probing gas geological features around the drill hole, the water-bearing ability of a rock stratum and geological lithology and structures.

Description

technical field [0001] The invention relates to the field of geological borehole measurement devices and methods, in particular to a directional transient electromagnetic device and measurement method in boreholes. This invention provides a solution to the directional transient electromagnetic device in the borehole, and constitutes a new logging system for the directional transient electromagnetic device in the borehole, which is not affected by the presence or absence of coupling media in the borehole. It can serve the drilling inclinometer and lithology measurement in the fields of geotechnical engineering, underground engineering, geological disasters and mine safety. Has a wide range of applications. Background technique [0002] At present, underground engineering detection and underground disaster prevention and control are mainly carried out by means of drilling combined with geophysical exploration. The daily geological prediction of mine roadways and traffic tunn...

Claims

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Application Information

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IPC IPC(8): G01V3/28
Inventor 刘盛东倪圣军张平松王汪根潘乐荀周官群吴荣新
Owner ANHUI HUIZHOU GEOLOGY SECURITY INST
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