A Borehole Electromagnetic Receiver for Detecting Subsurface Electrical Structures

A receiver and electromagnetic technology, which is applied in the field of low-frequency electromagnetic signal detection and in-well electromagnetic receivers. It can solve the problems of low-frequency noise processing, insufficient tunnel space operations, limited number of channels, and poor adaptability, etc., and achieves fast data transmission in real time. Effect

Active Publication Date: 2018-10-30
CHINA UNIV OF GEOSCIENCES (BEIJING)
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Problems solved by technology

[0009] Based on the TDEM method, the ground well three-component TEM of the Institute of Geophysics and Geochemistry uses fluxgate sensors to measure the three-component magnetic field. It has a single parameter and a limited number of channels. It has deficiencies in low-frequency noise processing and tunnel space operations, and its adaptability needs to be improved.

Method used

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  • A Borehole Electromagnetic Receiver for Detecting Subsurface Electrical Structures
  • A Borehole Electromagnetic Receiver for Detecting Subsurface Electrical Structures
  • A Borehole Electromagnetic Receiver for Detecting Subsurface Electrical Structures

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with accompanying drawing:

[0049] like figure 1 As shown, a well electromagnetic receiver for detecting underground electrical structures is composed of a wellhead control unit 10, a drawworks 11, a cable 12, and a well probe 13. The well probe 13 is connected to the drawworks 11 through the cable 12, and the wellhead The control unit 10 connects the cable 12 and controls the drawworks 11 to control the probe 13 in the well.

[0050] like figure 2 As shown, the probe tube in the well is a titanium steel pipe, the front end of the titanium steel pipe is provided with a front-end malaux head, and the inside of the titanium steel pipe is provided with a power supply module 20, a communication module 21, an inclinometer module 22, a control circuit 23, an acquisition circuit 24, and an upper electrode 25. A three-axis induction coil magnetic sensor 26 , a three-axis fluxgate magnetic sensor 27 and a l...

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Abstract

The invention discloses an in-well electromagnetic receiver for detecting underground electrical structure. Apparent resistivity and apparent polarizability of an underground medium are measured so as to acquire electrical abnormality around a well head. The in-well electromagnetic receiver is mainly composed of a well head control unit, a winch and cable and an in-well detection pipe, and measuring range includes a three-component magnetic field B, three-component dB / dt and electric field vertical component. The in-well electromagnetic receiver realizes multi-component and multi-parameter measurement, is high in real-time data transmission speed, has lower noise at low frequency and is suitable for exploration of deep metal ore.

Description

technical field [0001] The invention relates to the field of geophysical detection, in particular to the detection of low-frequency electromagnetic signals, and relates to an electromagnetic receiver in a well for detecting underground electrical structures. Background technique [0002] Electromagnetic method (or electromagnetic induction method) is an important branch of electrical prospecting. This method mainly utilizes the differences in electrical conductivity, magnetic permeability and dielectric properties of rock ore, applies the principle of electromagnetic induction, observes and studies the distribution law (frequency characteristics and time characteristics) of artificial or natural electromagnetic fields, and then solves various related problems. geological problem. [0003] The well-ground electromagnetic method refers to a type of electromagnetic sounding method that supplies high-power alternating current in the well and receives electromagnetic field signa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/10
CPCG01V3/10G01V3/101
Inventor 陈凯金胜魏文博邓明阿木尔史心语
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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