Background technique
Induced polarization method (abbreviation induced polarization method) is to swash the difference of electrical effect as geophysical exploration using underground difference rock, oreElectrical effect is swashed by observing and studying the earth, in a kind of method of Underground geological condition in basis.Search for mineral deposit exploration andHydrogeology, engineering geology, resource of water supply explore various aspects extensive application.For China to look for mine cause to make hugeContribution, not only has found all kinds of non-ferrous metal deposits such as a large amount of copper, lead, zinc, molybdenum, and find noble metal ferrous metal,In terms of the mineral deposits such as rare metal, important function has also been played.
Lower stable DC is supplied to the earth by AB current electrode, is lying concealed the MN measurement electricity above natural electric conductivityIt can observe the charge and discharge curve changed over time between pole, the moment of power supply can observe primary current on MN ground resistancePrimary potential difference produced on the ore body with electronic conduction and the country rock interface with ionic conduction under the action of nonlocal fieldStored charge has been given birth to, and has formd additional electric field, has generated secondary current.Using this characteristic, by secondary in ground observationThe situation of change of electric current achievees the purpose that the occurrence status for inferring underground ore bodies.
Fig. 1 is that area measurement figure is intensified on ground, and wherein AB is emission electrode, respectively arranges three in emission electrode two sidesBar survey line, Hydrographic General Line direction is parallel with emission electrode, to carry out swashing electric area measurement.
Sounding of induced polarization is rock, ore body vertically apparent chargeability (η under a certain depth measurement point of researchs) variation sideMethod.Its electrode arrangement and moving method are identical with resistivity sounding, current electrode (A, B) the two sides measuring point O in opposite directionIt is displaced outwardly, and measuring electrode (M, N) is motionless or keeps certain proportion with ABGround is mobile simultaneously.It is commonly used to estimateThe buried depth of polarization body.Utilize ηsThe method of curve approximation estimation buried depth has turning point method, bathmometry and saturation value point method etc..
Fig. 2 is ground sounding of induced polarization schematic diagram, is symmetrical quadrupole device, electrodes of A, B and measuring electrode M, NIt is symmetrically arranged point-blank, AO ︰ BO=AB/2, MO ︰ NO=MN/2, therefore claims symmetrical quadrupole arrangement.As electrode spacing (AB/2) variation and the position of measuring point O it is constant when, then constitute symmetrical four-pole sounding arrangement.
In well the method for electrical method physical prospecting mainly have cross beam floor, IP in well, electromagnetic wave in well, borehole radar,Self-potential method in Low Frequency Electromagnetic Methods and well in well, can be with the geology knot between detecting shaft, around the borehole wall and in well between earth's surfaceStructure.Its main working method has ground-well method, well-ground mode and well-well mode, mainly measures apparent resistivity, secondary field electricityThe parameters such as potential difference or apparent chargeability.Be widely used in Solid Mineral exploration, the hydrology and engineering field, Petroleum finance withAnd coal exploration and exploitation, achieve preferable geological effect.
IP in well is that current electrode or measuring electrode are put into underground by drilling or probing engineering, carries out induced polarizationA kind of underlying geophysical prospecting of method observation, IP in well method powers or measures in well, by ground noise and ground mulching layerInfluence becomes smaller, and increases IP effect, thus this method is in widespread attention and develops.Induced polarization method is mainly adopted in well at presentWith time domain measurement, mainly there are ground-well, well-Jing Hejing-ground working method.
Fig. 3 is well-well working method, and well-well mode is well power supply, and in another well measurements, the pole A is placed on ore bed or hasNear the exception of meaning, the pole B is laid at earth's surface " infinity "；Arrangement of the measuring electrode " MN " in well is: upper, N's M existsUnder, record point is at the midpoint MN.Its feature is used to find between two holes ore body or determines that ore body seen in two holes is electrical connected problem.
Fig. 4 is well-ground working method, this working method is the mine being placed in current electrode " A " in drilling or in tunnelOn body, B is beaten in earth's surface pole at " infinity ", and measuring electrode lays Mo, Nx, Ny tri-, and by left hand, (middle finger is downward, and index finger refers toY, thumb refer to X) rectangular coordinate system arrangement, Mo is origin of coordinate, and is record point.In measurement process, observe along profile directionThe primary field and secondary field electric potential gradient (including charge rate) of (X-axis) and vertical section direction (Y-axis).It interrogates on the ground that it is solvedTopic is demanded and is drawn a circle to approve on the ground ore body areal extent, finds adjacent blind mineralization body, IP in well relative to surface electric survey,It is big with depth of exploration, the advantages that resolution capability is strong, and anomaly intensity is big, and Explanation Accuracy is high.The prior art is for gold by detecting shaftBelong to sulfide blind orebody and determine ore body counter bored holes spatial distribution range and state, is not provided with relevant programme, technologyPersonnel increase difficulty when surveying
Summary of the invention
In view of this, the embodiment of the invention provides a kind ofly-well induced-polarization measurement method and relevant devices.
A kind ofly-well induced-polarization measurement method is provided in the embodiment of the present invention, comprising:
The drilling for measurement is vertically arranged perpendicular to earth's surface in region to be measured；
Current electrode is arranged in earth's surface around the drilling, and the current electrode is located in the region to be measured；
Reference electrode is arranged in the position of drilling infinity described in the surface distance in the region to be measured；
The first measuring electrode and the second measuring electrode, first measuring electrode and described second are suspended in the drillingMeasuring electrode has preset interval in vertical direction；
Obtain the first location information of first measuring electrode and second measuring electrode in the drilling；
The second location information at test electrode midpoint is determined according to the positional information, wherein the test electrode midpointFor the midpoint between the first test electrode and the second test electrode；
The test electrode midpoint, which is obtained, using ground induced polarization method is in the first measurement position in the current electrodeWhen corresponding the first metrical information for including the first apparent resistivity and the first apparent chargeability and the test electrode midpoint existSecond including the second apparent resistivity and the second apparent chargeability that the current electrode is in corresponding when the second measurement position is surveyedInformation is measured, and repeats to measure；
First metrical information is obtained according to multiple measurement and second metrical information determines the region to be measuredThe areal extent of interior ore body, so that determining the adjacent blind mineralization body of the drilling according to the areal extent.
Optionally, the ground induced polarization method calculates apparent resistivity and the method for apparent chargeability includes:
K=2 π rAM·rAN/(rAN-rAM)
Wherein, k is electrode coefficient,Respectively first test electrode and the second test electricityPrimary field, secondary field and potential difference of total field on extremely.
Optionally, the basis repeatedly measures first metrical information and second metrical information determine it is described toThe areal extent of ore body in measured zone, comprising:
According to being demanded on the region to be measured with the primary field of Y direction and secondary field electric potential gradient along the x axisWith delineation ore body areal extent, wherein the X-direction is profile direction, the Y-axis is vertical section direction.
A kind ofly-well induced-polarization measurement device is provided in the embodiment of the present invention, described device includes:
Ground-well measurements device transmitting module, for establish in measurement environment-secondary field；
Ground-well measurements device receiving module, for obtaining the potential difference received in the primary field；
Data acquisition module, for by describedly-well measurements device receiving module acquisition in describedly-well measurements deviceThe potential difference that transmitting module is in the different location is converted into apparent resistivity and apparent chargeability, and according to ore body is calculatedAreal extent.
Optionally, describedly-well measurements device receiving module includes the first measuring electrode and the second measuring electrode, describedFirst measuring electrode and second measuring electrode are arranged at vertical direction interval.
Optionally, the operating mode of described device measurement and transmitting is automatic mode or fixed mode.
A kind ofly-well induced-polarization measurement device is provided in the embodiment of the present invention, described device includes:
First measuring unit, for being vertically arranged perpendicular to earth's surface the drilling for measurement in region to be measured；
Current electrode is arranged for the earth's surface around the drilling in first setting unit, and the current electrode is located at instituteIt states in region to be measured；
Ginseng is arranged in second setting unit, the position for the infinity that drills described in the surface distance in the region to be measuredExamine electrode；
Third setting unit, for suspending the first measuring electrode and the second measuring electrode in the drilling, described firstMeasuring electrode has preset interval in vertical direction with second measuring electrode；
First acquisition unit, for obtaining first measuring electrode and second measuring electrode in the drillingFirst location information；
First determination unit, for determining the second location information at test electrode midpoint according to the positional information, whereinThe test electrode midpoint is the midpoint between the first test electrode and the second test electrode；
Second measuring unit, for obtaining the test electrode midpoint in the current electrode using ground induced polarization methodCorresponding the first metrical information including the first apparent resistivity and the first apparent chargeability, Yi Jisuo when in the first measurement positionIt is corresponding including the second apparent resistivity and second when the current electrode be in the second measurement position to state test electrode midpointSecond metrical information of apparent chargeability, and repeat to measure；
Second determination unit, for according to repeatedly measurement obtains first metrical information and second metrical information is trueThe areal extent of ore body in the fixed region to be measured, so that determining the adjacent blind ore of the drilling according to the areal extentChange body.
Optionally, second measuring unit is specifically used for:
K=2 π rAM·rAN/(rAN-rAM)
Wherein, k is electrode coefficient,Respectively first test electrode and the second test electricityPrimary field, secondary field and potential difference of total field on extremely.
Optionally, second determination unit is specifically used for:
According to being demanded on the region to be measured with the primary field of Y direction and secondary field electric potential gradient along the x axisWith delineation ore body areal extent, wherein the X-direction is profile direction, the Y-axis is vertical section direction.
As can be seen from the above technical solutions, the embodiment of the present invention has the advantage that
A kind ofly-well induced-polarization measurement the method and relevant device provided in the embodiment of the present invention, using IP in well,There is its unique prospecting result, essentially consist in it in production, using drilling or tunnel, power supply or measuring device are closerIn detection purpose object, therefore the signal for the deep anomaly source observed is stronger, relatively increases depth of exploration, can also be from differenceIpsilateral does not measure electric field depth space distribution characteristics caused by detected object to depth, can obtain more acurrate richer ground electricity moneyMaterial, can solve the insoluble certain geological problems of surface electric survey.
Description and claims of this specification and term " first ", " second ", " third " " in above-mentioned attached drawingThe (if present)s such as four " are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should manageThe data that solution uses in this way are interchangeable under appropriate circumstances, so that the embodiments described herein can be in addition to illustrating hereinOr the sequence other than the content of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended thatCover it is non-exclusive include, for example, containing the process, method, system, product or equipment of a series of steps or units need not limitIn step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, produceThe other step or units of product or equipment inherently.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, completeSite preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based onEmbodiment in the present invention, those skilled in the art's every other implementation obtained without creative effortsExample, shall fall within the protection scope of the present invention.
Effect of induced polarization: under the secondary field of artificial current field-or excitation field action, the rock with different electrochemical propertiesStone or ore, the secondary electrical field (induced polarization field) for being changed over time generation due to electrochemical action.This physical chemistry is madeWith referred to as effect of induced polarization.It includes the effect of induced polarization of electronic conductor and the effect of induced polarization of ion conductor.
Influence effect of induced polarization factor include:
1, rock and ore material composition: general, the induced polarization intensity of electronic conduction mineral is larger, and polarizability (η) is 10%More than；
2, the content and structure of of metalliferous mineral: general, metalliferous mineral content is more under same structural condition, polarizability (η)It is bigger；In the case where metalliferous mineral content is equal, disseminated structure ore than compact shape structure ore polarizability (η) greatly,
3, supply current: current density is within the scope of tens microamperes/square centimeter, voltage of secondary field Δ U2；With power supplyThe variation of electric current I direct ratio, polarization field potential difference Δ U also increase with multiple, and there are also substantial connections for power-on time.
Induced polarization method: English: induced polarization method is the induced polarization according to rock, oreEffect is come one group of electrical prospecting method the problems such as finding metal and solve hydrogeology, engineering geology.It is divided into direct current again and swashsSend out polarization method (time domain method) and alternating current induced polarization method (frequency domain method (SIP)).Common electrode arrangement has Middle-gradient rowColumn, composite profile arrangement, fixed point source arrangement, symmetrical four-pole sounding arrangement etc..It can also be with filling ore body directly or indirectlyElectricity method come draw a circle to approve ore body extension and increase depth of exploration.
A kind ofly-well induced-polarization measurement method is provided in conjunction with shown in Fig. 5 and Fig. 6, in the embodiment of the present invention, comprising:
S101, the drilling for measurement is vertically arranged perpendicular to earth's surface in region to be measured；
Current electrode is arranged in S102, the earth's surface around the drilling, and the current electrode is located at the region to be measuredIt is interior；
Reference electrode is arranged in S103, the position of drilling infinity described in the surface distance in the region to be measured；
The first measuring electrode and the second measuring electrode, first measuring electrode and institute are suspended in S104, the drillingStating the second measuring electrode has preset interval in vertical direction；
S105, the first position letter of first measuring electrode and second measuring electrode in the drilling is obtainedBreath；
S106, the second location information for determining test electrode midpoint according to the positional information, wherein the test electrodeMidpoint is the midpoint between the first test electrode and the second test electrode；
S107, the test electrode midpoint is obtained using ground induced polarization method in the current electrode in the first measurementWhen position it is corresponding include the first apparent resistivity and the first apparent chargeability the first metrical information and the test electrode inPoint corresponding the including the second apparent resistivity and the second apparent chargeability when the current electrode be in the second measurement positionTwo metrical informations, and repeat to measure；
S108, first metrical information is obtained according to repeatedly measurement and second metrical information determine it is described to be measuredThe areal extent of ore body in region, so that determining the adjacent blind mineralization body of the drilling according to the areal extent.
In step s 107, in order to be more conducive to find out the trend of mineralization body and spatial situation, it is also necessary to change power supplyThe position of electrode A is emitted in different positions, and same position is received in well.According to A1, A2, A3, A4 in Fig. 6Position lay emission electrode respectively.The orientation of target geological body counter bored holes is known as best orientation A1, also referred to as main orientation, phaseReverse claims reverse A3, other two orientation are auxiliary orientation A2 and A4, to this without limiting.
Optionally, the ground induced polarization method calculates apparent resistivity and the method for apparent chargeability includes:
K=2 π rAM·rAN/(rAN-rAM)
Wherein, k is electrode coefficient,Respectively first test electrode and the second test electricityPrimary field, secondary field and potential difference of total field on extremely.
Optionally, the basis repeatedly measures first metrical information and second metrical information determine it is described toThe areal extent of ore body in measured zone, comprising:
According to being demanded on the region to be measured with the primary field of Y direction and secondary field electric potential gradient along the x axisWith delineation ore body areal extent, wherein the X-direction is profile direction, the Y-axis is vertical section direction.
Referring to figs. 7 and 8, a kind ofly-well mentioned in the embodiment of the present invention is excited below with reference to concrete scenePolarization measurement method is illustrated, with the validity of verification method:
Ground-well method induced-polarization measurement has been carried out in the village the Mu Jia Copper Mine hole ZK5901.
28 ° of the village the Mu Jia Copper Mine hole ZK5901 aperture orientation, does not get to copper mine body in drilling process, then carries out ground-The induced polarization method of well mode measures.Electric logging observed result show to have near 165 meters of well sections a stronger natural potential,Charge rate is coincide abnormal well.Ground-well swashs the azimuthal measurement of electricity, at upper and lower tens meters of the position of the well section, has apparentIt is good to lead high polarization anomalous reflection, especially the Δ V in two orientation A3, A41、ΔV2Anomalous reflection amplitude is big, combines in positive and negative valueOff-note, show that A3, A4 electrode spacing anomaly source are nearest, accordingly infer anomaly source (ore body) main body be located at the orientation A3, A4 (brillHole southwest side), this measurement result is the strong supplement to drilling data.
59 line generalization sectional view of the village Tu8Wei Mujia, it is seen that the orientation A3 secondary field is in anti-s type, and the orientation A1 secondary field is in s type,Infer that anomaly source (ore body) is to well inclined accordingly, that is to say, that ZK5901 beats in hole the tail by the nearly well of anomaly source (ore body)Portion.The hole ZK5902,208 ° of aperture orientation are then laid again.Copper mine body is got to, it was confirmed that the above-mentioned ore body of deduction is oppositeThe hole ZK5901 spatial distribution state is correct.
Detection result shows: IP in well, has its unique prospecting result, essentially consists in it in production, utilize drillingOr tunnel, power supply or measuring device, closer to detection purpose object, therefore the signal for the deep anomaly source observed is stronger, phaseDepth of exploration is increased over the ground.Moreover, ipsilateral, does not measure electric field depth space caused by detected object also from different depthDistribution characteristics can obtain more acurrate, richer ground electricity data, can solve that surface electric survey is insoluble to interrogate certainlyTopic.
A kind ofly-well induced-polarization measurement device is additionally provided in the embodiment of the present invention, described device includes:
Ground-well measurements device transmitting module, for establish in measurement environment-secondary field；
Ground-well measurements device receiving module, for obtaining the potential difference received in the primary field；
Data acquisition module, for by describedly-well measurements device receiving module acquisition in describedly-well measurements deviceThe potential difference that transmitting module is in the different location is converted into apparent resistivity and apparent chargeability, and according to ore body is calculatedAreal extent.
Optionally, describedly-well measurements device receiving module includes the first measuring electrode and the second measuring electrode, describedFirst measuring electrode and second measuring electrode are arranged at vertical direction interval.
Optionally, the operating mode of described device measurement and transmitting is automatic mode or fixed mode.
A kind ofly-well induced-polarization measurement device is additionally provided in the embodiment of the present invention, described device includes:
First measuring unit, for being vertically arranged perpendicular to earth's surface the drilling for measurement in region to be measured；
Current electrode is arranged for the earth's surface around the drilling in first setting unit, and the current electrode is located at instituteIt states in region to be measured；
Ginseng is arranged in second setting unit, the position for the infinity that drills described in the surface distance in the region to be measuredExamine electrode；
Third setting unit, for suspending the first measuring electrode and the second measuring electrode in the drilling, described firstMeasuring electrode has preset interval in vertical direction with second measuring electrode；
First acquisition unit, for obtaining first measuring electrode and second measuring electrode in the drillingFirst location information；
First determination unit, for determining the second location information at test electrode midpoint according to the positional information, whereinThe test electrode midpoint is the midpoint between the first test electrode and the second test electrode；
Second measuring unit, for obtaining the test electrode midpoint in the current electrode using ground induced polarization methodCorresponding the first metrical information including the first apparent resistivity and the first apparent chargeability, Yi Jisuo when in the first measurement positionIt is corresponding including the second apparent resistivity and second when the current electrode be in the second measurement position to state test electrode midpointSecond metrical information of apparent chargeability, and repeat to measure；
Second determination unit, for according to repeatedly measurement obtains first metrical information and second metrical information is trueThe areal extent of ore body in the fixed region to be measured, so that determining the adjacent blind ore of the drilling according to the areal extentChange body.
Optionally, second measuring unit is specifically used for:
K=2 π rAM·rAN/(rAN-rAM)
Wherein, k is electrode coefficient,Respectively first test electrode and the second test electricityPrimary field, secondary field and potential difference of total field on extremely.
Optionally, second determination unit is specifically used for:
According to being demanded on the region to be measured with the primary field of Y direction and secondary field electric potential gradient along the x axisWith delineation ore body areal extent, wherein the X-direction is profile direction, the Y-axis is vertical section direction.
A kind ofly-well induced-polarization measurement the method and relevant device provided in the embodiment of the present invention, using IP in well,There is its unique prospecting result, essentially consist in it in production, using drilling or tunnel, power supply or measuring device are closerIn detection purpose object, therefore the signal for the deep anomaly source observed is stronger, relatively increases depth of exploration, can also be from differenceIpsilateral does not measure electric field depth space distribution characteristics caused by detected object to depth, can obtain more acurrate richer ground electricity moneyMaterial, can solve the insoluble certain geological problems of surface electric survey.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be withIt realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unitIt divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or componentsIt can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown orThe mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unitIt closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unitThe component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multipleIn network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unitIt is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated listMember both can take the form of hardware realization, can also realize in the form of software functional units.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of above-described embodiment is canIt is completed with instructing relevant hardware by program, which can be stored in a computer readable storage medium, storageMedium may include: read-only memory (ROM, Read Only Memory), random access memory (RAM, RandomAccess Memory), disk or CD etc..
Those of ordinary skill in the art will appreciate that implement the method for the above embodiments be can be withRelevant hardware is instructed to complete by program, the program can store in a kind of computer readable storage medium, onStating the storage medium mentioned can be read-only memory, disk or CD etc..
Above to it is provided by the present invention a kind ofly-well induced-polarization measurement method and relevant device carried out detailed JieIt continues, for those of ordinary skill in the art, thought according to an embodiment of the present invention, in specific embodiments and applicationsThere will be changes, in conclusion the contents of this specification are not to be construed as limiting the invention.