CN103267980B - The geophysical prospecting method of earth electromagnetic field field source correction and measurement mechanism - Google Patents
The geophysical prospecting method of earth electromagnetic field field source correction and measurement mechanism Download PDFInfo
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Abstract
The geophysical prospecting method of earth electromagnetic field field source correction and measurement mechanism, the field source data measured with self-timing are run some not timing to the physical prospecting instrument in this moment and are measured value revision, by revising the instability of nagneto-telluric field field source, eliminating nagneto-telluric field field source own to the interference of instrument obtains data accurately, drawing contrast is carried out by these data, be exactly the situation of having reacted subsurface geology anomalous body more accurately, really, thus solve the problem that consequent surveyed data exist poor accuracy and poor stability.
Description
Technical field
The present invention relates to and relate to the geophysical Detection Techniques of International Classification of Patents G01V, the geophysical prospecting method of especially earth electromagnetic field field source correction and measurement mechanism.
Background technology
A kind of method of geophysical detection and applied physics principle mapping sub-surface mineral products, geologize structure and theory.Be called for short physical prospecting.It has and uses more widely in engineering construction and environmental protection etc.Physical property that the rock ore body deposited or tectonic structure have based on them, scale and residing position are composed in underground, and have corresponding physical phenomenon to be reflected to earth's surface or adjacent ground surface, this physical phenomenon is a part for the overall physical phenomenon of the earth.The working contents of geophysical survey is the information utilizing the geological instrument adapted to measure, receive the various physical phenomenons of perform region, apply the information that effective disposal route therefrom extracts needs, and according to rock ore body or structure and the physical difference of country rock, analyze in conjunction with geologic condition, make geologic interpretation, infer detected object composes in underground deposit position, magnitude range and occurrence, and reflect the physical quantity etc. of corresponding physical property characteristic, make the corresponding map explaining deduction.Geographic physical exploration is the indispensable a kind of measure of geologic examination and geology research.
The information of the various physical phenomenons that various geophysical method is measured on earth's surface or adjacent ground surface can be referred to as the information of geophysical field.Geophysical field can be divided into the geophysical field of naturally occurring geophysical field and artificial excitation.The gravity field of the earth, terrestrial magnetic field, earth electric field, Temperature Field, nuclear physics field are naturally occurring geophysical fields; Produce elastic wave at the elastic wave field of underground propagation, the internal field produced in underground of powering to underground, the electromagnetic field etc. inspired to underground emitting electromagnetic wave by secondary reflection, belong to the artificial geophysical field excited.Geophysical field also can be divided into normal field and anomalous field.
A large amount of use resistivity prospecting quasi-instrument in geophysical survey, field source uses made field source and nagneto-telluric field etc. as field source, made field source is too heavy, use in real process is not facilitate especially, the null gravity of mt field source own is fast very convenient in actual use, but because nagneto-telluric field can be shined upon, as distant place lightening activity, earth rotation, the impact of the factors such as geologic media, it is a field source changed at any time, unstable field source causes very large impact to geophysical measurement, solve the advantage of itself null gravity of stability recycling of mt field source, practical value that will be huge energetically.
Patent document as:
Chinese patent application 201,210,257,373 1 kinds of geophysical exploration data acquisition station, comprise the analog to digital conversion unit of interconnective front end and the processing unit of rear end; Analog to digital conversion unit is made up of variable gain amplifier and analog to digital converter; Processing unit is made up of field programmable gate array and the data transmission interface chip be connected on field programmable gate array.
Chinese patent application 201080033191, for detecting the close method and system of conduction, embedded structure, by putting in structure by electric current by soil conductivity, improves the detectability to the such as underground structure of pipeline, pipe etc. and accuracy.The electromagnetic field launched thus is detected by removable detecting unit on the ground.According to this electromagnetic field, detecting unit can be determined the close of structure and issue caution signal.This caution signal helps the operator of earthmoving equipment to avoid the collision with structure.
Summary of the invention
The object of this invention is to provide geophysical prospecting method and the measurement mechanism of the correction of earth electromagnetic field field source, the numerical value revising field source obtains measurement data accurately to adapt to the change of natural electric field field source.
The object of the invention is to be realized by following technical measures: correction instrument and physical prospecting instrument configure the high-precision identical time service of high-precision clock and GPS, and correction instrument is measured automatically according to setting-up time, physical prospecting instrument runs some not timing and measures; Measured by correction instrument is the change of field source itself, the change that field source measured by physical prospecting instrument is formed by the impact of differently plastid afterwards, because field source is unstable time measured, so measured data carry out field source correction according to the change of field source, modification method is:
A) utilize the data of the correction instrument after denoising smooth as the raw data A corrected;
The data of above-mentioned a) step process of b) learning from else's experience are T, then T0=A as the value that arithmetic mean obtains;
C) according to the Measuring Time of physical prospecting instrument one point data, the data T1 of same time correction instrument is found;
D) value that T1-T0 obtains is the corrected value T3 of one point data, and T3 can just can bear, that is: T1-T0=T3, one point data T4 add T3 be diurnal correction after value T5, that is: T4+T3=T5; T5 needs to be shown as separately row at one point data, and one point data file needs to show original value and the value after correcting.
The invention has the beneficial effects as follows: the field source data measured with self-timing are run some not timing to the physical prospecting instrument in this moment and measured value revision, by revising the instability of nagneto-telluric field field source, eliminating nagneto-telluric field field source own to the interference of instrument obtains data accurately, drawing contrast is carried out by these data, be exactly the situation of having reacted subsurface geology anomalous body more accurately, really, thus solve the problem that consequent surveyed data exist poor accuracy and poor stability.
Accompanying drawing explanation
Fig. 1 revises measuring principle schematic diagram in the present invention
Fig. 2 revises measurement mechanism structural principle schematic diagram in the present invention
Reference numeral comprises: physical prospecting instrument 1, electrode bar 2, the earth 3, correction instrument 4.
Embodiment
The present invention is according to the characteristic changed at any time of mt field source, use a correction instrument 4 observe mt field source with time situation of change, record its field source Changing Pattern, re-use simultaneously other physical prospecting instrument 1 carry out run point measure data according to, the field source situation of change that measured data record according to correction instrument 4 carries out field source correction to the data measured by physical prospecting instrument 1, so just can obtain field source and manufacture the same stable field source of field source to artificial, just equally accurate with manually manufacturing field source quasi-instrument through field source revised race point data.So not only eliminated determination that the artificial heaviness manufacturing field source not easily moves but also obtained equally accurate measurement result, having obtained very large practical value in practical application.
Realize device of the present invention to comprise, physical prospecting instrument 1, electrode bar 2 and correction instrument 4.
Further illustrate below in conjunction with drawings and Examples.
In the present invention, as shown in Figure 1, correction instrument 4 and physical prospecting instrument 1 configure the high-precision identical time service of high-precision clock and GPS, and correction instrument 4 is measured automatically according to setting-up time, and physical prospecting instrument 1 runs some not timing and measures; Measured by correction instrument 4 is the change of field source itself, the change that field source measured by physical prospecting instrument 1 is formed by the impact of differently plastid afterwards, because field source is unstable time measured, so measured data carry out field source correction according to the change of field source, modification method is:
A) utilize the data of the correction instrument 4 after denoising smooth as the raw data A corrected;
The data of above-mentioned a) step process of b) learning from else's experience are T, then T0=A as the value that arithmetic mean obtains;
C) according to the Measuring Time of physical prospecting instrument 1 one point data, the data T1 of same time correction instrument 4 is found;
D) value that T1-T0 obtains is the corrected value T3 of one point data, and T3 can just can bear, that is: T1-T0=T3, one point data T4 add T3 be diurnal correction after value T5, that is: T4+T3=T5; T5 needs to be shown as separately row at one point data, and one point data file needs to show original value and the value after correcting.
In aforementioned, physical prospecting instrument 1 and correction instrument 4 connecting electrode rod 2, electrode bar 2 lower end is implanted and is measured field source the earth 3, and wherein, physical prospecting instrument 1 is identical equipment with correction instrument 4, comprises seismic instrument, electrical instrument, magnetometer and gravity apparatus.
As shown in Figure 2, instrument system is formed by a correction instrument 4 and one group of multiple stage physical prospecting instrument 1, the time service mode of the high-precision clock of every platform instrument configuration and GPS, correction instrument 4 and physical prospecting instrument 1 is made to keep high-precision identical clock, correction instrument 4 can be measured with reference to automatic process of measurement automatically according to setting the time, and physical prospecting instrument 1 runs some not timing and measures.Measured by correction instrument 4 is the change of field source itself, the change that field source measured by correction instrument 4 is formed by the impact of differently plastid afterwards, because field source is unstable time measured, so measured data carry out field source correction according to the change of field source, method is as described below:
1), because the interference on instrument itself and ground, first noise is removed in first smoothing for the data measured by correction instrument 4 computing, 53 times average formula is as follows:
Y
0=（-3y
-2+12y
-1+17y
0+12y
1-3y
2）/35
Wherein Y
0represent the data in new array, y
-2,
, y
1, y
2represent 5 data of the adjacent continuous in former array.
2) data, measured by physical prospecting instrument 1 race point carry out field source correction simultaneously measured by instrument A, and method is:
A) utilize the data of the correction instrument 4 after denoising smooth as the raw data corrected, such as A1, A2, A3, A4, A5, A6;
The data of above-mentioned a) step process of b) learning from else's experience are T0 as the value that arithmetic mean obtains,
Then T0=(A1+A2+A3+A4+A5+A6)/6;
C) according to the Measuring Time of physical prospecting instrument 1 one point data, the data T1 of same time correction instrument 4 is found;
D) value that T1-T0 obtains is the corrected value T3 of one point data, and T3 can just can bear, that is: T1-T0=T3, one point data T4 add T3 be diurnal correction after value T5, that is: T4+T3=T5; This value T5 needs to be shown as separately row at one point data, and one point data file needs to show original value and the value after correcting; One point data and day parameter show respectively according to being divided into two data forms.
In aforementioned, the progress that the present invention gives prominence to is, be not to provide anti-interference with device such as raising measuring accuracy etc., neither increase device by artificial method to go to compensate earth electromagnetic field field source, but the change adapting to natural electric field field source obtains data accurately only by the numerical value revising field source carries out contrasting.And be compared to and increase means for anti-jamming, improve the instrument such as measuring accuracy, cost is lower, and accuracy is higher, thus solve the field source of natural electric field own unstable thus cause instrument survey the shortcoming of the inaccuracy of data.
The invention solves in prior art, cause the defect of data inaccuracy because earth electromagnetic field field source is unstable, obtain important breakthrough for geophysical prospecting technology, detection efficiency and precision increase substantially, actual test Be very effective.Compared with prior art, have the following advantages:
1), light and fast: omit the artificial heaviness manufacturing field source, greatly decrease beyond the weight of 80%, be easy to resettlement and use;
2), data are accurate: no matter which kind of change natural electric field field source does, by repairing field source change numerical value thus having ensured the accuracy of measurement data;
3), cost is lower: instrument without the need to adopt anti-interference with raising measuring accuracy etc. device, save cost.
4), applied widely: by the shielding of low-resistance geologic body with high resistant geologic body is nonconducting affects, to be suitable for the exploration in various area.
Claims (3)
1. the geophysical prospecting method of earth electromagnetic field field source correction, it is characterized in that: correction instrument (4) configures the high-precision identical time service of high-precision clock and GPS with physical prospecting instrument (1), correction instrument (4) is measured automatically according to setting-up time, and physical prospecting instrument (1) runs some not timing and measures; Measured by correction instrument (4) is the change of field source itself, the change that field source measured by physical prospecting instrument (1) is formed by the impact of differently plastid afterwards, when measuring because field source is unstable, so measured data carry out field source correction according to the change of field source, modification method is:
A) utilize the data of the correction instrument (4) after denoising smooth as the raw data A corrected;
B) the raw data A getting correction is T0 as the value that arithmetic mean obtains,
Then T0=A;
C) according to the Measuring Time of physical prospecting instrument (1) one point data, the data T1 of same time correction instrument (4) is found;
D) value that T1-T0 obtains is the corrected value T3 of one point data, and T3 can just can bear, that is: T1-T0=T3, one point data T4 add T3 be diurnal correction after value T5, that is: T4+T3=T5; T5 needs to be shown as separately row at one point data, and one point data file needs to show original value and the value after correcting.
2. the geophysical prospecting method of earth electromagnetic field field source correction as claimed in claim 1, it is characterized in that, physical prospecting instrument (1) and correction instrument (4) connecting electrode rod (2), electrode bar (2) lower end is implanted and is measured field source the earth (3), wherein, physical prospecting instrument (1) is identical equipment with correction instrument (4), comprises seismic instrument, electrical instrument, magnetometer and gravity apparatus.
3. the geophysical prospecting method of earth electromagnetic field field source correction, it is characterized in that, instrument system is formed by a correction instrument (4) and one group of multiple stage physical prospecting instrument (1), the time service mode of the high-precision clock of every platform instrument configuration and GPS, correction instrument (4) is made to keep high-precision identical clock with physical prospecting instrument (1), correction instrument (4) can be measured with reference to automatic process of measurement automatically according to setting the time, and physical prospecting instrument (1) runs some not timing and measures; Measured by correction instrument (4) is the change of field source itself, the change that field source measured by correction instrument (4) is formed by the impact of differently plastid afterwards, when measuring because field source is unstable, so measured data carry out field source correction according to the change of field source, method is as described below:
(1), because the interference on instrument itself and ground, first noise is removed in smoothing for the data measured by correction instrument (4) computing, 53 times average formula is as follows:
Y
0＝(-3y
-2+12y
-1+17y
0+12y
1-3y
2)/35
Wherein Y
0represent the data in new array, y
-2, y
-1, y
0, y
1, y
2represent 5 data of the adjacent continuous in former array, the data that physical prospecting instrument (1) runs measured by point carry out field source correction simultaneously measured by correction instrument (4), and method is:
A) utilize the data of the correction instrument (4) after denoising smooth as the raw data corrected, i.e. A1, A2, A3, A4, A5, A6;
The raw data of b) getting correction is T0 as the value that arithmetic mean obtains,
Then T0=(A1+A2+A3+A4+A5+A6)/6;
C) according to the Measuring Time of physical prospecting instrument (1) one point data, the data T1 of same time correction instrument (4) is found;
D) value that T1-T0 obtains is the corrected value T3 of one point data, and T3 can just can bear, that is: T1-T0=T3, one point data T4 add T3 be diurnal correction after value T5, that is: T4+T3=T5; This value T5 needs to be shown as separately row at one point data, and one point data file needs to show original value and the value after correcting; One point data and day parameter show respectively according to being divided into two data forms.
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| CN102879828A (en) * | 2012-10-11 | 2013-01-16 | 甘肃铁道综合工程勘察院有限公司 | Audio magnetotelluric optimized collection method |
| CN203350464U (en) * | 2013-05-29 | 2013-12-18 | 上海艾都能源科技有限公司 | Earth electromagnetic field measuring device for field source correction |
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| US8392119B2 (en) * | 2009-04-29 | 2013-03-05 | Schlumberger Technology Corporation | Analysis of subsurface electromagnetic data through inversion with constrained casing correction coefficients |
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| WO2012052770A2 (en) * | 2010-10-20 | 2012-04-26 | Emon (Uk) Limited | Methods and apparatus for geophysical prospecting to detect bodies of fluids in underground formations |
| CN102879828A (en) * | 2012-10-11 | 2013-01-16 | 甘肃铁道综合工程勘察院有限公司 | Audio magnetotelluric optimized collection method |
| CN203350464U (en) * | 2013-05-29 | 2013-12-18 | 上海艾都能源科技有限公司 | Earth electromagnetic field measuring device for field source correction |
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