CN109001824A - A method of two poles of correction, which arrange non-infinite point, to be influenced - Google Patents
A method of two poles of correction, which arrange non-infinite point, to be influenced Download PDFInfo
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
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Abstract
A method of two poles of correction, which arrange non-infinite point, to be influenced.Since the cost of arrangement infinite point is excessive when carrying out the arrangement electrical prospecting of two poles, and non-infinite point is used to substitute infinite point, therefore the influence of the non-infinite point in the survey data arranged two poles is needed to be corrected.The present invention proposes that increasing an infinity supply terminals measures two non-infinite points to the correction parameter of two poles arrangement survey data, the survey data of two poles of actual measurement arrangement is corrected, to improve, there are survey data precision and exploration effects that non-two pole of infinite point arranges；And two infinite points in conventional two poles arrangement exploration are substituted with an infinity supply terminals, therefore exploration efficiency can be improved.
Description
Technical field
The present invention relates to a kind of two poles of correction in Key words exploration geophysics field to arrange the method that non-infinite electrode influences.
Background technique
Theoretic infinite electrode is used in two pole devices in electrical prospecting to be explored, according to theory calls,
It need to arrange infinity supply terminals B and infinity measuring point N, current electrode A, measuring point M；The distance of infinity supply terminals B to measuring point M
(LBM) otherwise less than 5 times electrodes of A to measuring point M distance (LAM), that is, meet relational expression LBM≥5LAM；Infinity measuring point N is arrived
Distance (the L of measuring point MNM) otherwise less than 5 times electrodes of A to measuring point M distance (LAM), that is, meet relational expression LNM≥5LAM；And
Infinity supply terminals B and infinity measuring point N cannot be located at the same side of survey line.But when the electrical method for carrying out the arrangement of two pole of medium and deep is surveyed
When spy, in order to obtain medium and deep resistivity anomaly, the distance (L of electrodes of A to measuring point MAM) generally require arrangement it is long
Distance.If desired the exception of 300 meters of depth, the distance (L of electrodes of A to measuring point are detectedAM) satisfaction is generally required greater than 600
Rice arranges electrical prospecting theory according to two poles, then infinite electrode B to measuring point M distance (LBM) need to reach 3 kms；Infinity
The arrangement of measuring point N requires also have similar requirement；Therefore so remote distance is to two pole arranged infinity supply terminals B of field and nothing
Poor remote measuring point N work belt carrys out very big difficulty, also increases exploration cost.Carry out the electrical prospecting work of two poles arrangement as another
With a varied topography, vegetation development, exploration area arrange the infinity supply terminals of vertical survey line and infinity measuring point be difficult to meet it is above-mentioned away from
From requiring, when field condition limitation can not infinity supply terminals and infinity measuring point in layout theory when or cause to explore
The non-infinity supply terminals and non-infinity measuring point that are unsatisfactory for electrical prospecting requirement can not be carried out or be arranged to work.If arrangement
Non- infinity supply terminals and non-infinity measuring point then contain non-infinity supply terminals in two pole of field arrangement electrical prospecting data
With the influence of non-infinity measuring point, if the two poles arrangement survey data obtained is theoretical according further to conventional two poles arrangement electrical prospecting
Calculation method calculate, then under non-infinity supply terminals and non-infinity measuring point mode two poles arrangement electrical prospecting data in by
In containing the influence of non-infinity supply terminals and non-infinity measuring point, and data skew is formed, to influence the arrangement of two poles
Electrical prospecting precision and effect, therefore need to reduce the two poles arrangement electrical prospecting number of non-infinity supply terminals and non-infinity measuring point
The influence of non-infinite electrode in improves surveying accuracy and effect.
Separately in the practical exploration process in field, infinity supply terminals and infinity measuring point workload in layout theory compared with
Greatly, and field data collections is waited to finish, needs to influence entire to collect infinity supply lines and electrode and preparing the more time
The exploration efficiency of method.Therefore need to improve conventional two poles arrangement electrical prospecting work, it improves two poles arrangement electrical method and surveys
Visit the efficiency of work.
Summary of the invention:
The purpose of the present invention is based on using in infinity supply terminals and the arrangement electrical prospecting of two poles of infinity measuring point progress
Infinity supply terminals and infinity measuring point is caused to be adopted due to landform, vegetation, depth of exploration, exploration cost, exploration efficiency etc.
Lead to contain non-infinity supply terminals and non-infinite in survey data with non-infinity supply terminals and non-infinity measuring point mode
The influence of remote measuring point, affects surveying accuracy and effect, proposes that a kind of two poles of correction arrange the method that non-infinite point influences, subtracts
The influence of few non-infinity supply terminals and non-infinity measuring point to two poles arrangement electrical prospecting data improves two poles arrangement electrical method and surveys
Visit precision and effect.
A method of two poles of correction, which arrange non-infinite point, to be influenced, the specific steps of which are as follows:
A) an infinity supply terminals B, first non-infinite point C and second non-infinity are laid on exploration area periphery
Point N arranges supply terminals A and measuring point M according to conventional two pole arrangement modes.Temporarily laying an infinity supply terminals B is to survey
Non- infinite point is measured to two correction parameters of survey data, once obtain two correction parameters, then infinity supply terminals B and
Relevant current supply line can be withdrawn in advance, thus it is unlikely as conventional two poles arrangement electrical prospecting, it needs to wait and entirely survey
Visiting work terminates to withdraw infinity supply terminals B and relevant conducting wire and influence the efficiency entirely explored.
B) it is powered using electrical method transmitter by interim infinity supply terminals B and first non-infinite point C, using electricity
Method receiver measures the potential difference of second non-infinite point N and measuring point M, and seeks first correction parameter of apparent resistivity
f1.First correction parameter f of apparent resistivity1Formula beWherein ρC→MNIt indicates when using nothing
Poor remote supply terminals B and when first non-infinite point C power supply, the current potential measured between measuring point M and second non-infinite point N
The apparent resistivity of differential conversion, unit are ohm meter, which is calculated using the formula of conventional three poles arrangement；
KCMNFor the electrode coefficient between first non-infinite point C and measuring point M and second non-infinite point N,Wherein CM and CN is respectively first non-infinite point C and measuring point M
Distance and first non-infinite point C at a distance from second non-infinite point N, unit is rice；KAM=2 π AM, wherein AM
Indicate the distance between supply terminals A to measuring point M, unit is rice.Multiple measuring points if it exists then obtain in the way of this step every
First correction parameter of a measuring point.
C) it is powered using electrical method transmitter by infinity supply terminals B and second non-infinite point N, is received using electrical method
Machine measures the potential difference of first non-infinite point C and supply terminals A, and seeks second correction parameter f of apparent resistivity2.Depending on
Second correction parameter f of resistivity2Formula beWherein ρN→ACIt indicates when using infinity
When supply terminals B and second non-infinite point N power supply, the potential difference that is measured between supply terminals A and first non-infinite point C
The apparent resistivity of conversion, unit are ohm meter, which is calculated using the formula of conventional three poles arrangement；KNAC
For the electrode coefficient of second non-infinite point N and supply terminals A and first non-infinite point C,Wherein NA and NC is respectively second non-infinite point N and power supply
At a distance from second non-infinite point N, unit is rice by the distance of point A and first non-infinite point C；KAM=2 π AM,
Middle AM indicates the distance between supply terminals A to measuring point M, and unit is rice.Multiple supply terminals if it exists, then in the way of this step
Obtain second correction parameter of each supply terminals.After the correction parameter for obtaining each measuring point and each supply terminals, then infinity
Supply terminals B and its associated tracks are recoverable to, and without waiting follow-up work to terminate, therefore are avoided that the infinite of conventional two poles arrangement
Remote supply terminals B and associated tracks have to wait for entire investigation and prospecting and terminate the problem of could withdrawing, and also only need to temporarily arrange one
A infinity supply terminals B, without arranging infinity measuring point.Therefore the efficiency of entire investigation and prospecting can be improved.
D) it is powered using electrical method transmitter by supply terminals A and first non-infinite point C, is measured using electrical method receiver
The potential difference U of second non-infinite point N and measuring point MMN, according to conventional first non-infinite point C and second non-nothing
Poor far point N regards the apparent resistivity formula of the two poles arrangement of infinity supply terminals and infinity measuring point respectivelyCalculate apparent resistivity ρAM, wherein AM indicates the distance between supply terminals A to measuring point M, single
Position is rice；UMNFor the potential difference of second non-infinite point N and measuring point M, unit is millivolt；IAFor the electric current that supply terminals A passes through,
Unit is milliampere.
E) the apparent resistivity ρ of each measuring point obtained in step d)AMUtilize first correction parameter f1With second school
Positive parameter f2Using formula ρJ=ρAM+f1+f2It is corrected, wherein ρJIt is non-to correct first non-infinite point C and second
The apparent resistivity under reaction measuring point M after infinite point N influence；First non-infinite point C and second is corrected to obtain
The apparent resistivity result that a non-infinity N point influences.
A method of two poles of correction, which arrange non-infinite point, to be influenced, it is characterised in that: first non-infinity supply terminals C
It is no less than at a distance from second non-infinity measuring point N twice of longest distance between supply terminals A and measuring point M.And first non-
Infinity supply terminals C and second non-infinity measuring point N is arranged in the vertical direction of survey line as far as possible, is located at the difference of survey line
Side.
A method of two poles of correction, which arrange non-infinite point, to be influenced, it is characterised in that: infinity supply terminals B is arranged as far as possible
In the vertical direction of survey line, and the distance of infinity supply terminals B to measuring point M is not less than longest distance between supply terminals A and measuring point M
Three times.So arrangement can reduce influence of the infinity supply terminals B to exploration results to the greatest extent, thus close to theoretic infinite
It is remote to require.
A kind of two poles of correction proposed by the present invention arrange the resistivity correction derivation of equation for the method that non-infinite point influences
Process is as follows:
If using two pole arrangeds supply terminals A, non-infinite point C, measuring point M and the non-infinite point of non-infinite point
N, another temporarily one infinity supply terminals B of arrangement.Supply current on supply terminals A is I, the supply current on non-infinite point C
Potential difference to measure on-I, measuring point M and non-infinite point N is UMN, current potential that the electric current on supply terminals A contributes measuring point M
Difference is UAM, the electric current on non-infinite point C is U to the potential difference that measuring point M is contributedCM, the electric current on supply terminals A is to non-infinity
The potential difference of point N contribution is UAN, the electric current on non-infinite point C is U to the potential difference that non-infinite point N is contributedCN, supply terminals A
Distance to measuring point M and non-infinite point N is respectively AM and AN, non-infinite electrode C to measuring point M and non-infinite point N away from
From respectively CM and CN.
Regard electrode A, M, N, C as four two pole collating units, i.e. bis- pole collating unit of AM, bis- pole collating unit of CM, AN
Two pole collating units, bis- pole collating unit of CN.
The apparent resistivity that measuring point M is measured when defining bis- pole collating unit of AM is ρAM(apparent resistivity belongs to actual response
Apparent resistivity under measuring point as a result, and this method using the result for needing to obtain after correction), measuring point when bis- pole collating unit of CM
The apparent resistivity that M is measured is ρCM.The apparent resistivity that non-infinite point N is measured when defining bis- pole collating unit of AN is ρAN, CN
The apparent resistivity that non-infinite point N is measured when two pole collating units is ρCN°
According to the theory of two poles arrangement electrical prospecting, just like drawing a conclusion:
Wherein KAM=2 π AM, KAN=2 π AN, KCM=2 π CM, KCN=2 π CN.
If not infinite point C and non-infinite point N meet infinite remote requirement, then KAN→+∞, KCM→+∞, KCN
→+∞, so that (1) formula simplifies are as follows:
So as to obtain:
(3) formula is to meet two poles arrangement apparent resistivity when infinity requires as non-infinite point C and non-infinite point N
Theoretical calculation formula.But due to increase of with a varied topography, vegetation development, depth of exploration etc., lead to non-infinite point C
When being unsatisfactory for the condition of infinity with the distance of non-infinite point N to measuring point M, if calculating two pole direct current electrical measurements according further to (3) formula
Deep resistivity data, then will affect the authenticity and reliability of survey data, to influence surveying accuracy and effect.
In order to reduce the influence of non-infinite point C and non-infinite point N to survey data, improves two poles and arrange electrical prospecting
Precision and effect convert (1) formula are as follows:
Since distance of the non-infinite point C and non-infinite point N in above-mentioned 4 points belongs to farthest, i.e. UCNIt is general and
Speech signal in the arrangement of two poles is most weak.
Therefore formula (4) can be approximated to be:
U in formula (6)CM-UCNIn measuring point M and non-nothing when to be powered using non-infinite point C and infinity supply terminals B
The potential difference generated between poor far point N；According to the principle of reciprocity U of electrical prospectingAN-UCN=UN→AC, UN→ACIt indicates by non-infinite
The potential difference that far point N and infinity supply terminals B is generated between supply terminals A and non-infinite point C when powering.Therefore formula (6) can
To become:
IfThen formula (7) becomes:
Then formula (8) is the electrical prospecting apparent resistivity updating formula of the two poles arrangement comprising non-infinite point.
Detailed description of the invention:
Fig. 1 is the method simple flow chart that two pole of correction of the invention arranges that non-infinite point influences；
Fig. 2 is the method field arrangement schematic diagram (acquisition first that two pole of correction of the invention arranges that non-infinite point influences
A correction parameter)；
Fig. 3 is the method field arrangement schematic diagram (acquisition second that two pole of correction of the invention arranges that non-infinite point influences
A correction parameter)；
The method field arrangement schematic diagram that Fig. 4 arranges non-infinite point for two pole of correction of the invention and influences (obtains non-nothing
The electrical prospecting information of the two poles arrangement of poor far point mode)；
Fig. 5 is two conventional pole DC detecting deep method schematic diagrams；
M in figurei(i=1,2 ... 11) represent multiple measurement points, and A represents supply terminals A, and B represents the infinity temporarily arranged
Supply terminals B, C represent non-infinite point C, and N represents non-infinite point N, and N ∞ represents infinity measuring point, and 1 represents electrical method transmitter, and 2
Electrical method receiver is represented, 3 represent conducting wire.
Specific embodiment:
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4 combination specific embodiment, the present invention will be further described.
An infinity supply terminals B is temporarily laid on exploration area periphery, separately lays first non-infinite point C and second
Non- infinite point N arranges supply terminals A and measuring point M according to conventional two pole arrangement modesi(i=1,2 ... 11).It is interim to lay one
Infinity supply terminals B is two correction parameters in order to measure non-infinite point to survey data, once obtain two corrections
Parameter, then infinity supply terminals B and relevant current supply line can be withdrawn in advance, thus unlikely as conventional two poles arrangement electrical method is surveyed
It visits like that, needs that entire investigation and prospecting is waited to terminate to withdraw infinity supply terminals B and relevant conducting wire and influence entirely to survey
The efficiency of spy.
It is powered using electrical method transmitter by infinity supply terminals B and first non-infinite point C, using electrical method receiver
Measurement second non-infinite point N and measuring point Mi(i=1,2 ... 11) potential difference, and seek the apparent resistivity of each measuring point
First correction parameter f1.Some measuring point MiFirst correction parameter f of the apparent resistivity of (i=1,2 ... 11)1Formula beWhereinIt indicates when using infinity supply terminals B and first non-infinite point
When C powers, in some measuring point MiThe view electricity of the current potential differential conversion measured between (i=1,2 ... 11) and second non-infinite point N
Resistance rate；For first non-infinite point C and some measuring point MiBetween (i=1,2 ... 11) and second non-infinite point N
Electrode coefficient,Wherein CMiIt is respectively first non-nothing with CN
Poor far point C and some measuring point MiThe distance of (i=1,2 ... 11) and first non-infinite point C and second non-infinite point N's
Distance, unit are rice；Wherein AMiIndicate supply terminals A to some measuring point Mi(i=1,2 ... 11) it
Between distance, unit is rice.First correction parameter of each measuring point is obtained in the way of this step.
It is powered using electrical method transmitter by infinity supply terminals B and second non-infinite point N, using electrical method receiver
The potential difference of first non-infinite point C and supply terminals A are measured, and seeks second correction parameter f of apparent resistivity2.Depending on electricity
Second correction parameter f of resistance rate2Formula beWherein ρN→ACIt indicates when using infinity
When supply terminals B and second non-infinite point N power supply, the potential difference that is measured between supply terminals A and first non-infinite point C
The apparent resistivity of conversion；KNACFor the electrode coefficient of second non-infinite point N and supply terminals A and first non-infinite point C,Wherein NA and NC is respectively second non-infinite point N and power supply
At a distance from second non-infinite point N, unit is rice by the distance of point A and first non-infinite point C；Wherein AMiIndicate supply terminals A to some measuring point MiThe distance between (i=1,2 ... 11), and unit is
Rice.Multiple supply terminals if it exists then obtain second correction parameter of each supply terminals in the way of this step.It obtains each
After the correction parameter of measuring point and each supply terminals, then infinity supply terminals B and its associated tracks are recoverable to, after waiting
Continuous work terminates, therefore is avoided that the infinity supply terminals B of conventional two poles arrangement and associated tracks have to wait for entire investigation and prospecting
The problem of end could be withdrawn, and also only need temporarily to arrange an infinity supply terminals B, without arranging infinity measuring point.Therefore
The efficiency of entire investigation and prospecting can be improved.
It is powered using electrical method transmitter by supply terminals A and first non-infinite point C, measures the using electrical method receiver
Two non-infinite point N and some measuring point MiThe potential difference of (i=1,2 ... 11)According to conventional first non-nothing
Poor far point C and second non-infinite point N regards the apparent resistivity formula of the two poles arrangement of infinity supply terminals and measuring point respectivelyCalculate apparent resistivityWherein AMiIndicate supply terminals A to some measuring point Mi(i
The distance between=1,2 ... 11), and unit is rice；For second non-infinite point N and some measuring point Mi(i=1,2 ...
11) potential difference, unit are millivolt；IAFor the electric current that supply terminals A passes through, unit is milliampere.
Each measuring point M of acquisitioniThe apparent resistivity of (i=1,2 ... 11)Utilize first correction parameter f1With
Two correction parameter f2Using formulaIt is corrected, wherein ρJTo correct first
Non- infinite point C and second non-infinite point N influence after some measuring point of reaction MiApparent resistivity under (i=1,2 ... 11)；
To obtain some measuring point Mi(i=1,2 ... 11), which corrects first non-infinite point C and second non-infinity N point, to be influenced
Apparent resistivity result.
First non-infinity supply terminals C is no less than supply terminals A and measuring point M at a distance from second non-infinity measuring point Ni
Twice of longest distance between (i=1,2 ... 11).And first non-infinity supply terminals C and second non-infinity measuring point N are most
Amount is arranged in the vertical direction of survey line, is located at the not ipsilateral of survey line.
Infinity supply terminals B is arranged in the vertical direction of survey line, and infinity supply terminals B to measuring point M as far as possiblei(i=1,
2 ... 11) distance is not less than supply terminals A and measuring point MiThree times of longest distance between (i=1,2 ... 11).So arrangement can be with
Influence of the infinity supply terminals B to exploration results is reduced to the greatest extent, to require close to theoretic infinity.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should be included in the present invention.
Claims (6)
1. a kind of two poles of correction arrange the method that non-infinite point influences, the specific steps of which are as follows:
A) an infinity supply terminals B, first non-infinite point C and second non-infinite point N are laid on exploration area periphery,
Supply terminals A and measuring point M is arranged according to conventional two pole arrangement modes；
B) it is powered using electrical method transmitter by infinity supply terminals B and first non-infinite point C, is surveyed using electrical method receiver
The potential difference of flow control two non-infinite point N and measuring point M, and seek first correction parameter f of apparent resistivity1；
C) it is powered using electrical method transmitter by infinity supply terminals B and second non-infinite point N, is surveyed using electrical method receiver
The potential difference of flow control one non-infinite point C and supply terminals A, and seek second correction parameter f of apparent resistivity2；
D) it is powered using electrical method transmitter by supply terminals A and first non-infinite point C, using electrical method receiver measurement second
The potential difference U of a non-infinite point N and measuring point MMN, according to conventional first non-infinite point C and second non-infinity
Point N regards the apparent resistivity formula of the two poles arrangement of infinity supply terminals and infinity measuring point respectivelyCalculate apparent resistivity ρAM, wherein AM indicates the distance between supply terminals A to measuring point M, single
Position is rice；UMNFor the potential difference of second non-infinite point N and measuring point M, unit is millivolt；IAFor the electric current that supply terminals A passes through,
Unit is milliampere；
E) the apparent resistivity ρ obtained in step d)AMUtilize first correction parameter f1With second correction parameter f2Using formula
ρJ=ρAM+f1+f2It is corrected, wherein ρJAfter correcting first non-infinite point C and second non-infinite point N influence
Reaction measuring point M under apparent resistivity；First non-infinite point C and second non-infinity N point shadow are corrected to obtain
Loud apparent resistivity result.
2. a kind of two poles of correction as described in claim 1 arrange the method that non-infinite point influences, it is characterised in that: apparent resistance
First correction parameter f of rate1Formula beWherein ρC→MNIt indicates to power when using infinity
When point B and first non-infinite point C power supply, the current potential differential conversion that is measured between measuring point M and second non-infinite point N
Apparent resistivity, unit are ohm meter；KCMNBetween first non-infinite point C and measuring point M and second non-infinite point N
Electrode coefficient,Wherein CM and CN is respectively first non-infinity
At a distance from point C and measuring point M and first non-infinite point C is at a distance from second non-infinite point N, and unit is rice；KAM=2
π·AM,Wherein AM indicates the distance between supply terminals A to measuring point M, and unit is rice.
3. a kind of two poles of correction as described in claim 1 arrange the method that non-infinite point influences,It is characterized in that:Apparent resistance
Second correction parameter f of rate2Formula beWherein ρN→ACIt indicates to power when using infinity
When point B and second non-infinite point N power supply, the current potential differential conversion that is measured between supply terminals A and first non-infinite point C
Apparent resistivity, unit is ohm meter；KNACFor second non-infinite point N and supply terminals A and first non-infinite point C
Electrode coefficient,Wherein NA and NC is respectively second non-infinity
At a distance from point N and supply terminals A and first non-infinite point C is at a distance from second non-infinite point N, and unit is rice；KAM=2
π AM, wherein AM indicates the distance between supply terminals A to measuring point M, and unit is rice.
4. a kind of two poles of correction as described in claim 1 arrange the method that non-infinite point influences, it is characterised in that: first
Non- infinity supply terminals C is no less than longest distance between supply terminals A and measuring point M at a distance from second non-infinity measuring point N
Twice.
5. a kind of two poles of correction as described in claim 1 arrange the method that non-infinite point influences, it is characterised in that: first
Non- infinity supply terminals C and second non-infinity measuring point N are arranged in the vertical direction of survey line as far as possible, and are located at survey line
It is not ipsilateral.
6. a kind of two poles of correction as described in claim 1 arrange the method that non-infinite point influences, it is characterised in that: infinity
Supply terminals B is arranged in the vertical direction of survey line as far as possible, and the distance of infinity supply terminals B to measuring point M not less than supply terminals A and is surveyed
Three times of longest distance between point M.
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| CN113608271A (en) * | 2021-08-02 | 2021-11-05 | 中国地质科学院 | Geological exploration data processing method and system |
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|---|---|---|---|---|
| CN113093291A (en) * | 2021-04-06 | 2021-07-09 | 湖南省地质调查院(湖南省地质矿产勘查开发局油气资源调查中心) | Differential electrical prospecting method for detecting leakage of pollutants |
| CN113093291B (en) * | 2021-04-06 | 2023-10-27 | 湖南省地质调查院(湖南省地质矿产勘查开发局油气资源调查中心) | Differential electrical prospecting method for pollutant leakage detection |
| CN113608271A (en) * | 2021-08-02 | 2021-11-05 | 中国地质科学院 | Geological exploration data processing method and system |
| CN113608271B (en) * | 2021-08-02 | 2024-01-30 | 中国地质科学院 | Geological exploration data processing method and system |
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