CN110907999A - Active power electrical prospecting method based on passive power electric field signal measurement - Google Patents
Active power electrical prospecting method based on passive power electric field signal measurement Download PDFInfo
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Abstract
An active power electrical prospecting method based on passive power electric field signal measurement. According to the method, the frequency and the strength of the passive source electric field signal in the exploration area are observed, the frequency with the weak passive source electric field signal is selected to send the active source signal, the receiver receives the electric field signal transmitted by the active source signal through the underground, and therefore electric field data with higher quality are obtained, and electric exploration with better exploration effect is achieved. The method has the characteristics of high data quality, high signal-to-noise ratio, good exploration effect and the like, and can indirectly improve exploration efficiency and reduce exploration cost.
Description
Technical Field
The invention relates to a novel electrical prospecting method in the field of geophysical prospecting.
Background
The current frequency domain electrical prospecting method generally transmits signals according to the frequency value of a transmitter for electrical prospecting, and a receiver measures signals on a measuring point based on the frequency value transmitted by the transmitter without considering the characteristics of the strength, the frequency and the like of a human electromagnetic interference signal in a prospecting area. With the enhancement of human activities, the human electromagnetic interference in the electrical prospecting area is stronger and stronger, and sometimes the strength of the human electromagnetic interference is higher than that of a signal transmitted by an electrical prospecting transmitter, so that the signal-to-noise ratio of data which cannot be or is difficult to develop or obtain in part of the prospecting area is low, and the application range of the electrical prospecting is reduced.
The invention content is as follows:
based on the problems of the conventional electrical prospecting method, the invention provides the characteristic of measuring or monitoring the passive source electric field signal in a prospecting area, and selects the frequency value with the weakest intensity of the passive source electric field signal as the frequency value of the power supply signal of the transmitter of the active source electrical prospecting, thereby improving the data quality of the active source electrical prospecting, improving the signal to noise ratio, finally realizing the improvement of the prospecting effect of the electrical prospecting, indirectly improving the prospecting efficiency of the electrical prospecting, reducing the prospecting cost of the electrical prospecting and expanding the application range of the electrical prospecting.
An active power electrical prospecting method based on passive power electric field signal measurement comprises the following specific steps:
a) determining an exploration area, arranging frequency domain passive source electric field signal observation or monitoring equipment in the exploration area, and acquiring potential difference and frequency values of different frequencies in the exploration area; in order to improve the observation or monitoring efficiency of the passive source electric field signal, the frequency difference of adjacent frequencies can be set as
Frequency doubling or 2 frequency doubling or other frequency doubling values; in order to obtain higher-precision potential difference and frequency value data, potential difference data within a period of time can be monitored at the same point, and average potential difference data of corresponding frequency values can be obtained; in order to obtain the overall characteristics of the passive source electric field signals in the exploration area, a plurality of points can be selected in the exploration area for detection or monitoring, and the average value of corresponding data is obtained; in order to obtain passive source electric field signal characteristic of key position in exploration areaThe key part in the exploration area can be used as the key area for observing or monitoring the passive source electric field signal;
b) comparing the potential differences with different frequencies obtained in the step a) to obtain the frequency value of the minimum potential difference; if only the potential difference of one frequency value is the minimum value, the frequency value is selected to be fUmin(ii) a If the potential differences having a plurality of frequency values are all the smallest, the lowest frequency value of the set of frequencies of the smallest potential difference is selected as fUmin；
c) According to the frequency value f of the minimum potential difference in step b)UminSetting the value f of the power supply frequency of the transmitter for active power electrical prospectingZLet f beUmin＝fZ(ii) a If the frequency of the active source's electrical prospecting transmitter is not very wide to choose from, the closest f can be chosenUminThe value of the supply frequency of (d);
d) measuring frequency values f at corresponding measuring points in an exploration area by adopting an electric field receiver for active source electrical explorationZPotential difference U ofΔAnd measuring the power supply frequency value f of the transmitter for active power electrical prospectingZThe current value of (1);
e) formula for calculating apparent resistivity according to conventional electrical prospecting
K is the coefficient of the device for electrical prospecting, and the apparent resistivity measurement result of the corresponding measuring point in the step d) is calculated;
f) processing the apparent resistivity result obtained in the step e) to obtain an electrical prospecting result of a corresponding measuring point. If data such as a series of measuring points, a series of potential differences with different receiving and transmitting distances and the like are obtained, two-dimensional or three-dimensional inversion can be carried out on all the data, and as the power supply frequency value transmitted by the transmitter for active source electrical prospecting avoids main interference signals of a human electric field in a prospecting area, the prospecting data with better signal-to-noise ratio can be obtained, and better prospecting effect can be obtained.
Preferably, all frequency values measured by the frequency domain passive source electric field signal measuring device are the same as all frequency values of the power supply signal output by the active source electrical prospecting transmitter, so that the corresponding frequency can be found in the active source electrical prospecting transmitter according to the frequency value of the minimum potential difference measured by the frequency domain passive source electric field signal measuring device.
Description of the drawings:
FIG. 1 is a flow chart of an active source electrical prospecting method based on passive source electric field signal measurement according to the present invention;
FIG. 2 is a flow chart of a conventional electrical prospecting method;
the specific implementation mode is as follows:
the present invention is further described with reference to the following embodiments with reference to fig. 1 and 2.
a, step a: determining an exploration area, arranging frequency domain passive source electric field signal measuring equipment at a key focus position in the exploration area, detecting or monitoring passive source electric field signals of various frequencies in the exploration area, and acquiring potential difference and frequency values of different frequencies in the exploration area; in order to improve the detection or monitoring efficiency, the frequency difference of adjacent frequencies of the passive source electric field signal measuring equipment is set to be 2 times, for example, the minimum frequency is set to be 0.125 Hz, 14 frequency values (for example, 0.125, 0.25, 0.5, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 and 1024 Hz) are selected according to the frequency difference of the 2 times, and the potential difference of the 14 frequency values in the exploration area is measured (respectively recorded as U, 512 and 1024 Hz)0.125、U0.25、U0.5、U1、U2、U4、U8、U16、U32、U64、U128、U256、U512、U1024)；
b, step (b): comparing the potential differences with different frequencies obtained in the step a to obtain the frequency value of the minimum potential difference; if only the potential difference of one frequency value is the minimum value, the frequency value is selected to be fUmin(ii) a If there are a plurality of frequency values for which the potential difference is all at a minimum, then one frequency value of the set of frequencies for which the potential difference is at a minimum is selected as fUmin(ii) a E.g. for a potential difference (U) of 14 frequencies in step a0.125、U0.25、U0.5、U1、U2、U4、U8、U16、U32、U64、U128、U256、U512、U1024) For comparison, assume U1Is the minimum of 14 potential differences, fUmin1 Hz;
c, step (c): according to the frequency value f of the minimum potential difference in the step bUminSetting the value f of the power supply frequency of the transmitter for active power electrical prospectingZLet f beUmin＝fZ(ii) a According to the comparison result of the potential differences of 14 frequencies in the step b, if the potential difference of 1 Hz is the minimum value of the 14 frequencies, fUmin＝fZSetting the power supply frequency value of a transmitter for active power electrical prospecting to be 1 Hz;
d, step: measuring frequency values f at corresponding measuring points in an exploration area by adopting an electric field receiver for active source electrical explorationZThe potential difference of (a); if the frequency of the minimum value of the potential difference in the 14 frequencies obtained in the step c is 1 Hz, and the power supply frequency value output by the transmitter of the active power supply electrical prospecting is 1 Hz, setting the electric field receiver of the active power supply electrical prospecting to measure the potential difference signal of 1 Hz; if the 1 Hz power supply current of the active source electrical prospecting transmitter is I, the 1 Hz potential difference acquired by the active source electrical prospecting receiver at a certain measuring point is UΔ(ii) a The detection or monitoring result in the step b shows that the potential difference of the passive source at 1 Hz is minimum, so that the signal-to-noise ratio at 1 Hz is highest under the condition that the power supply current of the transmitter for active source electrical prospecting is the same, and the prospecting data with higher quality can be obtained, so that higher prospecting precision and effect can be obtained;
e, step (e): d, calculating the apparent resistivity measurement result of the corresponding measuring point in the step d according to a conventional apparent resistivity calculation formula for electrical prospecting; apparent resistivity formula using conduction electrical method
Thereby obtaining the apparent resistivity of a certain measuring point; wherein K is the device coefficient for electrical prospecting;
f, step: and e, processing the apparent resistivity result obtained in the step e to obtain an electrical prospecting result of the corresponding measuring point. If the data volume is sufficient, two-dimensional or three-dimensional inversion processing can be carried out on apparent resistivity results of different measuring points, different power supply distances and the like, so that the resistivity distribution characteristics of different positions and different exploration depths are obtained, and the purpose of high-precision electrical prospecting in a prospecting area is realized.
The above description is only exemplary of the invention and should not be taken as limiting, since any modifications, equivalents, improvements and the like, which are within the spirit and principle of the invention, are intended to be included therein.
Claims (2)
1. An active power electrical prospecting method based on passive power electric field signal measurement comprises the following specific steps:
a) determining an exploration area, arranging frequency domain passive source electric field signal measuring equipment in the exploration area, and acquiring potential difference and frequency values of different frequencies in the exploration area;
b) comparing the potential differences with different frequencies obtained in the step a) to obtain the frequency value of the minimum potential difference; if only the potential difference of one frequency value is the minimum value, the frequency value is selected to be fUmin(ii) a If the potential differences having a plurality of frequency values are all the smallest, the lowest frequency value of the set of frequencies of the smallest potential difference is selected as fUmin；
c) According to the frequency value f of the minimum potential difference in step b)UminSetting the frequency value f of the power supply signal of the transmitter of active power electrical prospectingZLet f beUmin＝fZ；
d) Measuring frequency values f at corresponding measuring points in an exploration area by adopting an electric field receiver for active source electrical explorationZPotential difference U ofΔAnd measuring the power supply frequency value f of the transmitter for active power electrical prospectingZThe current value of (1);
e) formula for calculating apparent resistivity according to conventional electrical prospecting
K is the coefficient of the device for electrical prospecting, and the apparent resistivity measurement result of the corresponding measuring point in the step d) is calculated;
f) processing the apparent resistivity result obtained in the step e) to obtain an electrical prospecting result of a corresponding measuring point.
2. The active source electrical prospecting method based on passive source electric field signal measurement according to claim 1, characterized in that: preferably, all frequency values that can be measured by the frequency domain passive source electric field signal measuring device are the same as all frequency values of the power supply signal that can be output by the transmitter of the active source electrical prospecting.
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| CN111665569A (en) * | 2020-07-09 | 2020-09-15 | 中南大学 | Dual-mode frequency domain passive source electric field method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325031A (en) * | 2000-05-19 | 2001-12-05 | 何继善 | Electrical active-source frequency domain exploration method |
| EA020745B1 (en) * | 2011-12-05 | 2015-01-30 | Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет" (Сфу) | Electrical exploration device |
| CN106646635A (en) * | 2016-12-26 | 2017-05-10 | 张鑫 | Modified line source resistivity continuous measurement method |
| CN106873041A (en) * | 2017-04-19 | 2017-06-20 | 中南大学 | A kind of method that apparent resistivity is obtained by any level electric field component |
| CN107748395A (en) * | 2017-10-19 | 2018-03-02 | 中南大学 | A kind of multifrequency electric resistivity exploration method |
| CN108873083A (en) * | 2018-05-06 | 2018-11-23 | 东华理工大学 | A kind of artificial field source frequency domain electromagnetism apparent resistivity measurement method |
| CN110031901A (en) * | 2019-03-20 | 2019-07-19 | 武汉捷探科技有限公司 | One kind deepening electric prospecting system and a kind of investigation method |
-
2019
- 2019-12-26 CN CN201911369689.4A patent/CN110907999B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325031A (en) * | 2000-05-19 | 2001-12-05 | 何继善 | Electrical active-source frequency domain exploration method |
| EA020745B1 (en) * | 2011-12-05 | 2015-01-30 | Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет" (Сфу) | Electrical exploration device |
| CN106646635A (en) * | 2016-12-26 | 2017-05-10 | 张鑫 | Modified line source resistivity continuous measurement method |
| CN106873041A (en) * | 2017-04-19 | 2017-06-20 | 中南大学 | A kind of method that apparent resistivity is obtained by any level electric field component |
| CN107748395A (en) * | 2017-10-19 | 2018-03-02 | 中南大学 | A kind of multifrequency electric resistivity exploration method |
| CN108873083A (en) * | 2018-05-06 | 2018-11-23 | 东华理工大学 | A kind of artificial field source frequency domain electromagnetism apparent resistivity measurement method |
| CN110031901A (en) * | 2019-03-20 | 2019-07-19 | 武汉捷探科技有限公司 | One kind deepening electric prospecting system and a kind of investigation method |
Non-Patent Citations (3)
| Title |
|---|
| 寻峰 等: "频率域激电法在广西某金矿区的找矿应用", 《黄金科学技术》 * |
| 张继锋 等: "被动源电磁测深三维有限元数值模拟", 《成都理工大学学报(自然科学版)》 * |
| 龙西亭 等: "对人工源频域电磁法视电阻率的探讨", 《物探与化探》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111665569A (en) * | 2020-07-09 | 2020-09-15 | 中南大学 | Dual-mode frequency domain passive source electric field method |
| CN111665569B (en) * | 2020-07-09 | 2021-04-16 | 中南大学 | Dual-mode frequency domain passive source electric field method |
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