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Method of acquiring apparent resistivity from arbitrary horizontal electric field component

A technology of horizontal electric field and apparent resistivity, applied in the field of geophysical exploration, can solve problems such as data quality errors and difficulties, achieve the effects of improving accuracy and reliability, reducing angle and distance layout requirements, and expanding the measurement range

Active Publication Date: 2017-06-20
CENT SOUTH UNIV
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Problems solved by technology

But with E-E x and In the wide-area electromagnetic method, the angular relationship between the two measuring electrode lines and the two power supply electrode lines is strictly fixed, and it is very difficult to achieve the above requirements in areas with complex terrain ， Angle or measurement electrode distance deviation will cause a large error in data quality, which undoubtedly brings many problems to field construction and data interpretation

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  • Method of acquiring apparent resistivity from arbitrary horizontal electric field component
  • Method of acquiring apparent resistivity from arbitrary horizontal electric field component
  • Method of acquiring apparent resistivity from arbitrary horizontal electric field component

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Embodiment Construction

[0033] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0034] see figure 1 As shown, a method for obtaining the apparent resistivity by any horizontal electric field component comprises the following steps:

[0035] Step S1, sending the current signal to the target area to be tested;

[0036] Step S2. According to the feedback response signal generated by the target area to be measured to the current signal, the measured value of the potential difference between the two measuring electrodes in the target area to be measured is obtained;

[0037] Step S3, constructing an electromagnetic effect function based on the position information of the two power supply electrodes and the two measurement electrodes;

[0038] Step S4, b...

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Abstract

The invention provides a method of acquiring the apparent resistivity from arbitrary horizontal electric field component, comprising the following steps: sending a current signal to a target area to be tested; acquiring the measured value of potential difference between two measurement electrodes in the target area to be tested according to a feedback response signal generated by the target area to be tested to the current signal; building an electromagnetic effect function based on position information of two power supply electrodes and the two measurement electrodes; based on the electromagnetic effect function, building a relation function used to calculate the calculated value of potential difference between the two measurement electrodes; and iteratively calculating the relationship function until the difference between the calculated value of potential difference and the measured value of potential difference satisfies the precision requirement, so as to acquire the apparent resistivity. Human error can be reduced effectively, and the arrangement flexibility and efficiency of the measurement electrodes in the target area to be tested can be improved.

Description

technical field [0001] The invention relates to geophysical prospecting technology, and more specifically, relates to a method for obtaining apparent resistivity from arbitrary horizontal electric field components. Background technique [0002] Apparent resistivity is a parameter used to reflect changes in the conductivity of rocks and ores. In the case of various rocks underground, the apparent resistivity is not the real resistivity of a certain rock, but is related to the resistivity of various underground rocks and ores. It is related to the comprehensive influencing factors such as distribution state and electrode arrangement. [0003] The apparent resistivity acquisition method of the artificial source frequency domain electromagnetic method can usually use the CSAMT method (Chinese explanation: controlled source audio magnetotelluric method), based on the definition of electromagnetic wave impedance, the apparent resistivity calculation formula is used to calculate th...

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Application Information

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IPC IPC(8): G01V3/08G01V3/38
CPCG01V3/08G01V3/38
Inventor 李帝铨何继善
Owner CENT SOUTH UNIV
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