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Coaxial one-emission eight-reception transient electromagnetic surveying logging instrument

A transient electromagnetic and logging tool technology, applied in the field of transient electromagnetic exploration, can solve the problems of inability to cover multiple measurements, inability to obtain formation conductivity of different radial depths, inability to realize array measurement, etc. Conductivity measurement, the effect of improving accuracy

Pending Publication Date: 2020-07-21
TIANJIN UNIV MARINE TECH RES INST
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the various transient electromagnetic instruments that appear at present use one receiving coil to receive data, which cannot realize array measurement, and can only measure the receiving waveform of one source distance, and at the same time cannot cover strata with different radial depths multiple times measurement, the conductivity of formations at different radial depths cannot be obtained

Method used

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  • Coaxial one-emission eight-reception transient electromagnetic surveying logging instrument
  • Coaxial one-emission eight-reception transient electromagnetic surveying logging instrument
  • Coaxial one-emission eight-reception transient electromagnetic surveying logging instrument

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings, specific data processing examples, and best implementation modes, but the protection scope of the present invention is not limited thereto.

[0018] Connect the acquisition board to the computer with a USB serial port, so that the acquisition board and Figure 4 The upper computer shown is connected, and at the same time the two pins of the acquisition board output control signals are connected with the figure 2 The two pins of the transmitting coil load access terminal P18 are connected, and the two pins of VCC5 and GND of the acquisition board are connected with figure 2 The two pins VCC and GND of the power access terminal J15 of the middle power system are connected to provide 5V voltage for the power system of the transmitting circuit. figure 2 The main power input terminal J4 of the middle transmitter circuit is connected to the external power supply, figure ...

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Abstract

A coaxial one-emission eight-reception transient electromagnetic surveying logging instrument is composed of an emission system, a coil system and a receiving system. The instrument can generate a good-quality emission waveform of a bipolar square wave. The instrument can also automatically store collected data into a text file in real time, and then data processing and use in a later period are facilitated. The one-emission eight-reception coil system receives eight channels of data, array measurement is achieved, repeated coverage measurement can be conducted on stratums of different radialdepths, the electrical conductivities of the stratums of the different radial depths can be obtained, repeated measurement of the electrical conductivity at the same position can be conducted, the electrical conductivity measurement precision is improved, high-resolution interface surveying at eight radial depths can be conducted, measurement of electrical conductivity distributions at different moments is achieved, and the electrical conductivity of a longitudinal deep stratum is effectively measured.

Description

technical field [0001] The invention belongs to the technical field of transient electromagnetic prospecting, in particular to a coaxial one-shot-eight-receive transient electromagnetic prospecting instrument. Background technique [0002] In recent years, the transient electromagnetic method has developed rapidly in electrical prospecting, and its application fields have also continued to expand, involving underground metal ore exploration, oil and gas fields, coal fields, underground (hot) water, marine zones, structural mapping, frozen soil zones, hydrological Structural geology and engineering testing and other aspects. The operation process of the transient electromagnetic method is divided into three parts, which are transmission, electromagnetic induction, and reception in sequence. These three parts constitute a complete transient electromagnetic instrument, namely the transmitting system, the coil system and the receiving system. When the current of the transmittin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B49/00
CPCE21B47/00E21B49/00
Inventor 沈建国董恺强
Owner TIANJIN UNIV MARINE TECH RES INST
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