CN107340548A - Swash the method that the electric non-infinity current electrode of three pole depth measurements influences in a kind of correction time domain - Google Patents
Swash the method that the electric non-infinity current electrode of three pole depth measurements influences in a kind of correction time domain Download PDFInfo
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Abstract
Swash the method that the electric non-infinity current electrode of three pole depth measurements influences in a kind of correction time domain, the present invention due to reasons such as landform, signal intensities based on causing the infinity current electrode of the pole depth measurement of IP of time domain three to use non-infinity current electrode pattern, and the non-infinity current electrode for needing to reject in the apparent resistivity and apparent chargeability data of the pole depth measurement of IP of time domain three influences, proposing, which increases an infinity current electrode C, measures non-infinity current electrode B to the apparent resistivity of the pole depth measurement data of IP of time domain three, the affecting parameters ρ of apparent chargeabilityBAnd ηBApparent resistivity and apparent chargeability correction are carried out to the measured data of the pole depth measurement of IP of time domain three, obtain real apparent resistivity and apparent chargeability data under reaction measuring point, so as to improve the pole depth measurement data precision of IP of time domain three and exploration effects, application of the pole depth measurement of IP of time domain three in complicated landform is widened.
Description
Technical field
The present invention relates to a kind of correction time domain in Key words exploration geophysics field to swash the non-infinity power supply electricity of electric three pole depth measurements
The method that pole influences.
Background technology
In electrical prospecting theoretic infinity current electrode is employed in the pole depth measurement equipment of IP of time domain three
Explored, according to theory calls, if infinity current electrode is B, current electrode A, measuring point intermediate point is O, then infinity
Current electrode B to measuring point distance (LBO) otherwise be less than 5 times of electrodes of A to the distance (L of measuring pointAO), that is, meet relational expression LBO≥
5LAO.But it is abnormal in order to obtain medium and deep resistivity and polarizability when carrying out the three pole depth measurement of medium and deep IP of time domain, power
Distance (L of the electrode A to measuring pointAO) generally require and arrange long distance.If desired for the exception of 300 meters of depth of detection, power supply
Distance (L of the electrode A to measuring pointAO) satisfaction is generally required more than 600 meters, according to the pole depth measurement electrical prospecting reason of IP of time domain three
By, then current electrode B in infinity needs to meet vertical and remote survey line, and to each measuring point apart from (LBO) no less than 3 kms
Condition.Such qualifications bring very big difficulty to the pole electric sounding arrangement infinity current electrode work of field three, also increase
Exploration cost；Another with a varied topography, the vegetation development for carrying out three pole depth measurement work, the infinity power supply of vertical survey line is arranged in exploration area
Electrode is difficult to meet above-mentioned required distance, when field condition limitation can not be in layout theory infinity current electrode when, or
Investigation and prospecting is caused not carry out, otherwise arrangement is unsatisfactory for the non-infinity current electrode of electrical prospecting requirement, now time-domain
The influence that non-infinity current electrode is contained in three pole depth measurement electrical prospecting data of electricity is swashed, if the pole of IP of time domain three obtained
Depth measurement data calculate according further to the theoretical computational methods of the pole depth measurement of IP of time domain three, then in the pole depth measurement data of IP of time domain three
Due to containing the influence of non-infinity current electrode, data skew is formed, so as to which the pole depth measurement exploration of electricity three is swashed in influence time domain
Precision and effect, therefore need to reject the influence of non-infinity current electrode in the pole depth measurement survey data of IP of time domain three, obtain
To the apparent resistivity and apparent chargeability data objectively responded under MN measuring electrodes, surveying accuracy and effect are improved, while also improve
The versatility and applicability of this method.
The content of the invention：
The purpose of the present invention is due to landform, vegetation, depth of exploration, exploration in being explored based on the pole depth measurement of IP of time domain three
The reasons such as cost, exploration efficiency cause infinity current electrode to cause survey data using non-infinity current electrode working method
In include the influence of non-infinity current electrode, influence the precision and exploration effects of apparent resistivity and apparent chargeability data, propose
The method that the electric non-infinity current electrode of three pole depth measurements influences is swashed in a kind of correction time domain, when reducing non-infinity current electrode pair
Between domain swash the influences of electric three pole depth measurement apparent resistivities and apparent chargeability data, improve the surveying accuracy of the pole depth measurement of IP of time domain three
And effect.
Swash the tool for the method that the electric non-infinity current electrode of three pole depth measurements influences in a kind of correction time domain proposed by the present invention
Body realizes that step is as follows：
A) measurement of arrangement electrodes of A, non-infinite electrode B, infinite electrode C and all measuring points is required according to exploration
Electrode M, N, measuring point O are the centre position of measuring electrode M, N；
B) powered by non-infinity current electrode B and infinity current electrode C, get the apparent resistance of corresponding measuring point
The affecting parameters ρ of rate, apparent chargeabilityBAnd ηB；
C) powered by electrodes of A and non-infinity current electrode B, carry out the conventional pole depth measurement work of IP of time domain three
Make, measure the apparent resistivity ρ in measuring electrode M, N of measuring pointABWith apparent chargeability ηAB；
D) the affecting parameters ρ the non-infinity current electrode B got to the measuring pointBSubstitute into formula
(wherein KAFor the electrode coefficient calculated according to measuring electrode M, the N coordinate of some electrodes of A of measuring point and identical measuring point；KBFor
The electrode coefficient of identical measuring point is calculated according to non-infinite electrode B and identical measuring point measuring electrode M, N coordinate；ρABTo pass through
When some electrodes of A, non-infinity current electrode B power supplies, in the apparent resistivity measured by identical measuring point), pass through the formula
The apparent resistivity data correction of each electrodes of A of measuring point is carried out, measuring point is regarded so as to eliminate non-infinity current electrode B
Resistivity effects, obtain the true apparent resistivity ρ for reflecting the measuring pointAData；
E) apparent resistivities of the non-infinity current electrode B got to the measuring point, apparent chargeability affecting parameters ρBAnd ηB
Substitute into formula(wherein KAFor some electrodes of A according to measuring point and identical measuring point
The electrode coefficient that calculates of measuring electrode M, N coordinate；KBFor the measuring electrode M according to non-infinite electrode B and identical measuring point,
N coordinates calculate the electrode coefficient of identical measuring point；ρABDuring for by some electrodes of A, non-infinity current electrode B power supplies,
In the apparent resistivity measured by identical measuring point；ηABDuring for by some electrodes of A, non-infinity current electrode B power supplies, in phase
With the apparent chargeability measured by measuring point), the apparent chargeability data school of each electrodes of A of the measuring point is carried out by the formula
Just, the apparent chargeability of the measuring point is influenceed so as to eliminate non-infinity current electrode B, obtains and reflect that the true of the measuring point regards polarization
Rate ηAData.
If the supply current in the pole depth measurement electrodes of A of IP of time domain three of non-infinity current electrode working method is
Supply current on I, non-infinity current electrode B is-I, and the potential difference measured on measuring electrode M and N is UMN, current electrode
Electric current on A is U to the potential difference that measuring electrode M and N are contributedA, the electric current on non-infinity current electrode B is to measuring electrode M
Potential difference with N contributions is UB, electrodes of A to measuring electrode M and N distance is respectively AM and AN, and non-infinity power supply is electric
Pole B to measuring electrode M and N distance are respectively BM and BN.
Regard electrode A, M, N, B as the two pole depth measurement dresses of the IP of time domain for meeting infinity current electrode qualifications three
Put, i.e. AMN devices, BMN devices.
The apparent resistivity that measuring electrode M and N are measured when defining AMN three pole sounding gears of IP of time domain is ρA, regarding pole
Rate is ηA, the apparent resistivity that measuring electrode M and N are measured during tri- pole electric sounding apparatus of BMN is ρB, apparent chargeability ηB(ρBWith
ηBAlso it is non-infinity current electrode B to the apparent resistivity of measuring point and the affecting parameters of apparent chargeability).
According to the theory of electrical prospecting, just like drawing a conclusion：
Wherein
If not infinity current electrode B meets infinite requirement at a distance, then KB→+∞, so as to which (1) formula is reduced to：
So as to draw：
(3) formula is to meet the pole depth measurement theoretical formula of IP of time domain three of infinity current electrode requirement, formula reaction
Real change in resistance situation under measuring point.
But when due to the reason such as increase of with a varied topography, vegetation development, depth of exploration, causing non-infinity current electrode B
Distance to measuring point is unsatisfactory for LBO≥5LAOCondition when, if according further to (3) formula calculate the pole depth measurement of IP of time domain three regard electricity
Resistance rate data, then the authenticity and reliability of survey data will be influenceed, so as to influence surveying accuracy and effect.
In order to reduce influences of the non-infinity current electrode B to survey data, the pole depth measurement exploration of IP of time domain three is improved
Precision and effect, (1) formula are transformed to：
(4) ρ in formulaABFor measuring electrode M and N are real during three pole electric sounding apparatus under non-infinity current electrode working method
The apparent resistivity of border measurement, ρBFor tri- pole electric sounding apparatus of BMN when the apparent resistivity that measures of measuring electrode M and N.Due to non-nothing
Poor remote current electrode B is fixed, i.e. ρ for measuring pointB、KBNumerical value be to immobilize for some measuring point
, even if the position of electrodes of A changes, the numerical value of above-mentioned two coefficient is constant.KAIt is some electrodes of A with measuring point
The electrode coefficient relevant with measuring electrode MN positions, for some measuring point and A points, ρABIt is that can actually measure regarding for acquisition
Resistivity data.Therefore the apparent resistivity ρ of truth under reflection measuring point is obtained in formula (4)A, then only need to obtain ρBNumber
Value.
Under non-infinity current electrode working method, non-infinity current electrode B equally influences to regard pole on all measuring points
Rate measure data precision, therefore need regarding for the pole depth measurement of IP of time domain three to non-infinity current electrode working method to polarize
Rate data are corrected.
If under non-infinity current electrode working method, the apparent chargeability measured on measuring electrode M and N is ηAB, regarding electricity
Resistance rate is ρAB, the electric current in electrodes of A is η to the apparent chargeability that measuring electrode M and N are contributedA, non-infinity current electrode B
On electric current be η to the apparent chargeability that measuring electrode M and N are contributedB, then the updating formula of apparent chargeability be：
Corrected by the apparent chargeability of formula (5), non-infinity current electrode B is eliminated to measuring point regarding polarization so as to obtain
Rate influences, and obtains real apparent chargeability η under reflection measuring pointAData.
In order to realize the correction of the apparent resistivity of all measuring points and apparent chargeability, it is only necessary to which acquisition meets infinity power supply electricity
The apparent resistivity ρ that the measuring electrode M and N of each measuring point are measured during the tri- pole electric sounding apparatus of BMN of limited conditionBAnd apparent chargeability
ηB.To obtain the ρ of each measuring pointBAnd ηBData, the pole of IP of time domain three under non-infinity current electrode working method is surveyed
An infinity current electrode C for meeting electrical prospecting requirement is arranged in depth temporarily, infinity current electrode C can be along survey line side
To can both be arranged in the direction of electrodes of A, arrangement of measuring-line can also be deviateed, it is only necessary to meet following condition：LCO≥
5LBO.Therefore infinity current electrode C restriction requires to meet B points than electrical prospecting specification that the requirement of infinity current electrode will
It is low, easily realized in actually exploring.
In the electrical prospecting of field, infinity current electrode C, non-infinity current electrode B and all measuring points survey are arranged
After measuring electrode, electrical prospecting emitter is powered by infinity current electrode C and non-infinity current electrode B.Use electrical prospecting
Receiver measures the apparent resistivity ρ on the measuring electrode MN of all measuring pointsBWith apparent chargeability ηB(ρBAnd ηBAlso it is that non-infinity supplies
Electrode B is to the apparent resistivity of measuring point and the affecting parameters of apparent chargeability), the apparent resistivity ρ gotBOr apparent chargeability ηB
Formula (4) and (5) is substituted into, electricity is regarded to the pole depth measurement of all measuring point IP of time domain three under non-infinity current electrode working method
Resistance rate and apparent chargeability data are corrected, and truth, survey data that precision is higher under reflection measuring point are obtained, so as to carry
Its high exploration effects.
Brief description of the drawings：
Fig. 1 is the aligning step schematic diagram of the present invention；
Fig. 2 is the bearing calibration field work schematic diagram of the present invention；
Fig. 3 is the conventional pole depth detecting method schematic diagram of IP of time domain three；
M in figurei(i=1,2 ... 10) and Ni(i=1,2 ... 10) represent measuring electrode, and A represents electrodes of A, and C is represented
Infinity current electrode C, B represent non-infinity current electrode B.
Embodiment：
Referring to Fig. 1, Fig. 2, Fig. 3 and combination embodiment, the present invention will be further described.
Fig. 1 is the aligning step schematic diagram of the present invention；Fig. 2 is the bearing calibration field work schematic diagram of the present invention, and Fig. 3 is
The conventional pole depth detecting method schematic diagram of IP of time domain three.M in figurei(i=1,2,3 ... 10) and Ni(i=1,2,3 ... 10) generation
Table measuring electrode, A represent electrodes of A, and C represents infinity current electrode C, and B represents non-infinity current electrode B.
As shown in Fig. 2 arrange infinity current electrode C, nothing at the position selection one away from non-infinity current electrode B
Poor remote current electrode C meets condition to the distance CO of each measuring point and the distance BO of non-infinity current electrode B to each measuring point：
LCO≥5LBO。
Infinity current electrode C and non-infinity current electrode B is powered using electrical prospecting emitter, record power supply electricity
Flow valuve, each measuring electrode is measured to (the M in such as Fig. 2 with electrical prospecting receiver1N1、M2N2……M10N10) on potential difference,
And calculate the apparent resistivity ρ of all measuring pointsBiAnd apparent chargeability η (i=1,2,3...10)Bi(i=1,2,3...10), so as to
Get the apparent resistivity of all measuring points and the affecting parameters ρ of apparent chargeabilityBiAnd η (i=1,2,3...10)Bi(i=1,2,
3...10).The apparent resistivity ρ of all measuring pointsBiAnd apparent chargeability η (i=1,2,3...10)Bi(i=1,2,3...10) measured
Bi Hou, then withdraw infinity current electrode C.
Then according to shown in Fig. 3, electrodes of A and non-infinity current electrode B are combined into current electrode pair, with transmitting
Machine is powered to electrodes of A and non-infinity current electrode B, according to the Conventional Time under non-infinity current electrode working method
Swash the apparent resistivity ρ that electric three pole depth measurement modes obtain all measuring points in domainABWith apparent chargeability ηABData.
The non-infinity current electrode B of some measuring point apparent resistivity and apparent chargeability affecting parameters ρBi(i=1,2,
3...10) and ηBi(i=1,2,3...10), the apparent resistivity ρ of corresponding measuring pointABWith apparent chargeability ηABData, the dress of corresponding measuring point
Put COEFFICIENT KA、KBi(i=1,2,3...10) (wherein KAFor the measurement electricity of some electrodes of A according to measuring point and identical measuring point
The electrode coefficient that pole M, N coordinate calculates；KBFor measuring electrode M, the N coordinate meter according to non-infinite electrode B and identical measuring point
Calculate the electrode coefficient of identical measuring point), substitute into the apparent resistivity and apparent chargeability updating formula for corresponding to measuring pointWithFrom
And realize the Conventional Time domain under the non-infinity current electrode working method obtained to each measuring point and swash regarding for electric three pole depth measurements
Resistivity and apparent chargeability data are corrected, and get the AMN IP of time domain for meeting infinity current electrode code requirement
Three pole depth measurement apparent resistivities and apparent chargeability data, the correction influenceed on non-infinity current electrode is realized, improve survey data
Precision.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the present invention.
Claims (2)
1. the method that the electric non-infinity current electrode of three pole depth measurements influences is swashed in a kind of correction time domain, it is characterised in that：Selectively
Shape flat place lays an infinity current electrode C, and a current electrode pair is combined into non-infinity current electrode B, infinite
Remote current electrode C to measuring point O distance LCOWith non-infinity current electrode B to measuring point O distance LBOMeet LCO≥5LBO, O is
Measuring electrode M and N centre position；Powered, obtained non-infinite by infinity current electrode C and non-infinity current electrode B
Remote current electrode B is to the apparent resistivity of measuring point, the affecting parameters ρ of apparent chargeabilityBAnd ηB；Then by electrodes of A and non-infinite
Remote current electrode B, three pole depth measurement data of measuring point are measured, utilize the apparent resistivity of corresponding measuring point, the affecting parameters of apparent chargeability
ρBAnd ηBOn the pole depth measurement apparent resistivity of IP of time domain three and apparent chargeability that have non-infinity current electrode influence of corresponding measuring point
Data are corrected, so as to obtain real apparent resistivity and apparent chargeability data under reaction measuring point；Concretely comprise the following steps：
A) measuring electrode M, N of electrodes of A, non-infinity current electrode B, infinity current electrode C and measuring point, measuring point are arranged
O is the centre position of measuring electrode M, N；
B) powered by non-infinity current electrode B and infinity current electrode C, get the apparent resistivity of corresponding measuring point, regard
The affecting parameters ρ of polarizabilityBAnd ηB；
C) powered by electrodes of A and non-infinity current electrode B, carry out the conventional pole depth measurement work of IP of time domain three,
Measure the apparent resistivity ρ in measuring electrode M, N of measuring pointABWith apparent chargeability ηAB；
D) the affecting parameters ρ the non-infinity current electrode B got to the measuring pointBSubstitute into formulaIts
Middle KAFor the electrode coefficient calculated according to measuring electrode M, the N coordinate of some electrodes of A of measuring point and identical measuring point；KBFor root
The electrode coefficient of identical measuring point is calculated according to non-infinite electrode B and identical measuring point measuring electrode M, N coordinate；ρABTo pass through certain
When individual electrodes of A, non-infinity current electrode B power supplies, in the apparent resistivity measured by identical measuring point；Carried out by the formula
The apparent resistivity data correction of each electrodes of A of measuring point, so as to eliminate apparent resistances of the non-infinity current electrode B to measuring point
Rate influences, and obtains the true apparent resistivity ρ for reflecting the measuring pointAData；
E) apparent resistivities of the non-infinity current electrode B got to the measuring point, apparent chargeability affecting parameters ρBAnd ηBSubstitute into
FormulaWherein KAFor the measurement according to some electrodes of A of measuring point and identical measuring point
The electrode coefficient that electrode M, N coordinate calculates；KBFor measuring electrode M, the N coordinate according to non-infinite electrode B and identical measuring point
Calculate the electrode coefficient of identical measuring point；ρABDuring for by some electrodes of A, non-infinity current electrode B power supplies, identical
Apparent resistivity measured by measuring point；ηABDuring for by some electrodes of A, non-infinity current electrode B power supplies, in identical measuring point
Measured apparent chargeability；The apparent chargeability Data correction of each electrodes of A of the measuring point is carried out by the formula, so as to disappear
Unless infinity current electrode B influences on the apparent chargeability of the measuring point, the true apparent chargeability η for reflecting the measuring point is obtainedAData.
2. the method that the electric non-infinity current electrode of three pole depth measurements influences is swashed in a kind of correction time domain as claimed in claim 1,
It is characterized in that：When the Sounding Profile for the pole depth measurement of IP of time domain three for carrying out non-infinity powering mode has multiple depth measurement points
When, an infinity current electrode C is only arranged, and make infinity current electrode C to the distance L of all measuring pointsCOWith non-infinity
Distance Ls of the current electrode B to all measuring pointsBOIt is satisfied by LCO≥5LBORequirement；Obtain and reflect that the real of all measuring points regards electricity
Resistance rate and apparent chargeability data, then follow-up data processing is carried out to real apparent resistivity and the apparent chargeability data of all measuring points
And interpretation.
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| CN108508491A (en) * | 2018-05-03 | 2018-09-07 | 湖南师范大学 | A kind of ultra high density electrical method electrode planing method for eliminating polarity effect interference |
| CN109001824A (en) * | 2018-06-06 | 2018-12-14 | 中南大学 | A method of two poles of correction, which arrange non-infinite point, to be influenced |
| CN109184671A (en) * | 2018-08-28 | 2019-01-11 | 中国地质大学（武汉） | A kind of electromagnetic measurement while drilling underground signal reception pup joint equipment |
| CN110231661A (en) * | 2019-05-05 | 2019-09-13 | 湖南省地质调查院 | The corresponding method of rock sample and ground observation measurement parameters of electrical induction |
| CN113031080A (en) * | 2021-04-21 | 2021-06-25 | 中南大学 | New induced polarization method adopting simple polarization constant |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108508491A (en) * | 2018-05-03 | 2018-09-07 | 湖南师范大学 | A kind of ultra high density electrical method electrode planing method for eliminating polarity effect interference |
| CN108508491B (en) * | 2018-05-03 | 2019-11-08 | 湖南师范大学 | A kind of ultra high density electrical method electrode planing method for eliminating polarity effect interference |
| CN109001824A (en) * | 2018-06-06 | 2018-12-14 | 中南大学 | A method of two poles of correction, which arrange non-infinite point, to be influenced |
| CN109001824B (en) * | 2018-06-06 | 2019-06-25 | 中南大学 | A method of two poles of correction, which arrange non-infinite point, to be influenced |
| CN109184671A (en) * | 2018-08-28 | 2019-01-11 | 中国地质大学（武汉） | A kind of electromagnetic measurement while drilling underground signal reception pup joint equipment |
| CN110231661A (en) * | 2019-05-05 | 2019-09-13 | 湖南省地质调查院 | The corresponding method of rock sample and ground observation measurement parameters of electrical induction |
| CN110231661B (en) * | 2019-05-05 | 2021-03-23 | 湖南省地质调查院 | Rock specimen and corresponding method for field exploration measurement of induced polarization parameters |
| CN113031080A (en) * | 2021-04-21 | 2021-06-25 | 中南大学 | New induced polarization method adopting simple polarization constant |
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