CN114609201B - Rock sample Zeta electric potential, induced polarization signal and permeability multi-parameter measuring platform - Google Patents
Rock sample Zeta electric potential, induced polarization signal and permeability multi-parameter measuring platform Download PDFInfo
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- CN114609201B CN114609201B CN202210262837.8A CN202210262837A CN114609201B CN 114609201 B CN114609201 B CN 114609201B CN 202210262837 A CN202210262837 A CN 202210262837A CN 114609201 B CN114609201 B CN 114609201B
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- 230000035699 permeability Effects 0.000 title claims abstract description 42
- 230000010287 polarization Effects 0.000 title claims abstract description 36
- 239000011435 rock Substances 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000000243 solution Substances 0.000 claims abstract description 31
- 238000005259 measurement Methods 0.000 claims abstract description 27
- 239000012085 test solution Substances 0.000 claims abstract description 7
- 238000009434 installation Methods 0.000 claims abstract 3
- 229910021607 Silver chloride Inorganic materials 0.000 claims description 24
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 16
- 230000005284 excitation Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 8
- 238000011160 research Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000000704 physical effect Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000011343 solid material Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000000733 zeta-potential measurement Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- Chemical Kinetics & Catalysis (AREA)
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- Molecular Biology (AREA)
- Fluid Mechanics (AREA)
- Dispersion Chemistry (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention provides a rock sample Zeta potential, induced polarization signal and permeability multi-parameter measuring platform, which comprises: sample clamping device, water supply installation, zeta current potential measurement system, induced polarization measurement system, permeability measurement system, sample clamping device can the rock sample of centre gripping arbitrary shape, and sample holder both sides have the cavity that can stabilize solution velocity of flow and guard electrode, water supply installation can adjust the flood peak height and supply test solution, zeta current potential measurement system is arbitrary model pressure sensor and sensitive voltmeter, induced polarization measurement system is arbitrary model induced polarization measuring apparatu, permeability measurement system includes stopwatch and graduated flask. The invention has the beneficial effects that: the whole set of measuring device can be assembled in a laboratory, rock samples of different sizes are met, measurement of three physical properties of a Zeta potential, an induced polarization signal and permeability of the sample is simultaneously met, errors generated by replacing the device are avoided, and the device has important significance for scientific research in the field.
Description
Technical Field
The invention relates to the technical field of instruments and meters, in particular to a rock sample Zeta potential, induced polarization signal and permeability multi-parameter measuring platform.
Background
The Zeta potential, the induced current and the permeability of the solid substance are three basic physical properties of the solid material, reflect the electrical and structural characteristics of the solid material and are research hotspots in scientific research. The Zeta potential here is a measure of the strength of the mutual repulsion or attraction forces between the particles.
The Zeta potential meter is a potential tester designed according to solution interface electrostatic double layer phenomenon described by Stern theory, and measures a flowing potential coefficient (C = Delta E/Delta P) according to Helmholtz-Smoluchowschi (H-S) equation, namely: and substituting the flow potential coefficient into an H-S equation according to the ratio of the voltage change value to the pressure change value to calculate the Zeta potential of the sample surface. At present, the domestic Zeta potential measurement market is mainly imported instruments, and the price is high about hundreds of thousands of RMB.
The frequency spectrum induced polarization method (SIP for short) is an induced polarization method of a frequency domain in geophysical exploration. The method measures apparent complex resistivity in a wider frequency range by emitting alternating current, analyzes the frequency spectrum characteristic of the complex resistivity and solves the geological problem. The SIP method adopts a dipole-dipole device on the ground, and the radial electric field is observed by frequency sweep, so that the method is a high-density geometric depth measurement method.
The permeability reflects the structural characteristics of solid materials, and Darcy's law is the most basic law in seepage, the form of which is concise (v = kJ), and the method clearly shows the direct relation between the seepage velocity v and the hydraulic slope drop J. The permeability measurement method is related to factors such as the pore geometry, the particle size and the arrangement direction of the material, is a basic parameter for researching the material structure, and adopts an experimental determination method based on Darcy's law.
At present, the existing electrical and structural measurement platforms have the following defects:
1. the domestic Zeta potential measurement market mainly depends on foreign instruments and is high in price, and the combined measurement cost of electricity and structure is overhigh due to the permeability instrument and the induced polarization instrument.
2. When the samples are respectively subjected to electrical and structural experiments, the combined research of various physical parameters generates large errors due to the reloading of the samples.
Disclosure of Invention
In order to solve the above problems, the invention provides a rock sample Zeta potential, induced polarization signal and permeability multi-parameter measuring platform, which mainly comprises: the sample clamping device is used for fixing a sample to be detected;
the water supply device is used for continuously providing the test solution;
the Zeta potential measuring system is used for measuring the Zeta potential of the sample;
the excitation measuring system is used for measuring an excitation signal of the sample;
a permeability measurement system for measuring the permeability of the sample;
and the sample clamping device is respectively connected with the water supply device, the Zeta potential measuring system, the induced polarization measuring system and the permeability measuring system.
Further, the sample holding device comprises: the measuring electrode copper ring I and the measuring electrode copper ring II are located at two ends of the central tube, and small holes are formed in two ends of the central tube and used for connecting a lead with the copper ring.
Further, the water supply device includes: telescopic bracket, water supply bottle and pipe, be connected through the couple between water supply bottle and the telescopic bracket, and water supply bottle bottom and pipe connection, the telescopic bracket is used for adjusting vertical height, be equipped with the stagnant water valve on the pipe for whether control solution circulates.
Further, the sample holding device and the water supply device are connected through a conduit.
Further, the Zeta potential measuring system includes: a pressure sensor and a sensitive voltmeter.
Further, the induced polarization measurement system comprises: an electrization instrument.
Further, the permeability measurement system includes: a measuring cylinder and a stopwatch.
Furthermore, the sample clamping device and the Zeta potential measuring system are connected with a sensitive voltmeter through a first Ag/AgCl electrode and a second Ag/AgCl electrode, a guide pipe in the water supply device is connected with the pressure sensor, and the sample clamping device is connected with the excitation instrument through the first Ag/AgCl electrode, the second Ag/AgCl electrode and a lead.
Compared with the prior art, the technical scheme provided by the invention has the beneficial effects that:
1. greatly saves the cost of the combined measurement of electricity and structural science of the experimental sample, and obtains better effect under the condition of ensuring low cost.
2. Rock samples with different sizes can be measured, and granular samples and fibrous samples can also be measured.
3. The Zeta potential, the induced polarization signal and the permeability data of the sample can be measured under the condition that the sample is filled only once, the joint analysis of multiple physical parameters is realized, and the scientific research is facilitated.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a structural diagram of a multi-parameter measurement platform for Zeta potential, induced polarization signal and permeability of a rock sample in an embodiment of the invention.
FIG. 2 is a schematic diagram of a sample holder according to an embodiment of the present invention.
Fig. 3 is an exemplary graph of the Zeta potential of the sample surface measured in the examples of the present invention.
Fig. 4 is an exemplary diagram of an excitation signal measured in an embodiment of the present invention.
FIG. 5 is an exemplary graph of sample permeability measured in an example of the invention.
Wherein: 1. a central tube; 2. a first solution chamber; 3. a second solution chamber; 4. an Ag/AgCl electrode I; 5. a second Ag/AgCl electrode; 6. measuring a first electrode copper ring; 7. measuring a second electrode copper ring; 8. a first inverted cone connector; 9. a second inverted cone joint; 10. a pagoda joint I; 11. a pagoda joint II; 12. an O-shaped waterproof gasket; 13. a small hole; 14. a wire; 15. a telescopic bracket; 16. a water supply bottle; 17. a conduit; 18. a water stop valve; 19. a pressure sensor; 20. a sensitive voltmeter; 21. an induced polarization instrument; 22. a measuring cylinder; 23. a stopwatch; and 24, hanging hooks.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
The embodiment of the invention provides a multi-parameter measuring platform for the Zeta potential, the induced polarization signal and the permeability of a rock sample, which can measure the Zeta potential, the induced polarization signal and the permeability of the sample simultaneously, and the measuring time of one sample is less than 1 hour, so that the measuring platform is very convenient and fast.
A structure diagram of a rock sample Zeta potential, induced polarization signal and permeability multi-parameter measuring platform is shown in figures 1-2, and the rock sample Zeta potential, induced polarization signal and permeability multi-parameter measuring platform comprises a sample clamping device, a water supply device, a Zeta potential measuring system, an induced polarization measuring system and a permeability measuring system, wherein the sample clamping device is used for fixing a sample to be measured; the water supply device is used for continuously providing the test solution; the Zeta potential measuring system is used for measuring the Zeta potential of the sample; the excitation measuring system is used for measuring an excitation signal of the sample; and the permeability measuring system is used for measuring the permeability of the sample.
The sample holding device comprises: the measuring electrode comprises a central tube 1, a solution chamber I2, a solution chamber II 3, an Ag/AgCl electrode I4, an Ag/AgCl electrode II 5, a measuring electrode copper ring I6, a measuring electrode copper ring II 7, an inverted cone joint I8, an inverted cone joint II 9, a pagoda joint I10, a pagoda joint II 11 and two pairs of O-shaped waterproof gaskets 12, wherein the central tube 1 is fixedly connected with the solution chamber I2 and the solution chamber II 3 on two sides through threads, the side surfaces of the solution chamber I2 and the solution chamber II 3 are connected with the pagoda joint I10 and the pagoda joint II 11 through threads, the Ag/AgCl electrode I3, the Ag/AgCl electrode II 4, the solution chamber I2 and the solution chamber II 3 are connected through the inverted cone joint I8 and the inverted cone joint II 9, the measuring electrode copper ring I6 and the measuring electrode copper ring II 7 are located at two ends of the central tube 1, and small holes 13 are formed at two ends of the central tube 1 and used for connecting a lead 14 with the copper rings.
The water supply device includes: the water supply bottle 16 is connected with the telescopic support 15 through a hook 24 positioned at the upper end of the telescopic support 15, the bottom of the water supply bottle 16 is connected with the guide pipe 17 with a water stop valve 18, the telescopic support 15 is used for adjusting the vertical height, and the water stop valve 18 is used for controlling whether a solution flows through. The sample holding means and the water supply means are connected by a conduit 17.
The Zeta potential measuring system comprises: a pressure sensor 19 and a sensitive voltmeter 20. The induced polarization measurement system in this embodiment is an induced polarization instrument 21, and the permeability measurement system includes: a measuring cylinder 22 and a stopwatch 23. The sample clamping device and the Zeta potential measuring system are connected with a sensitive voltmeter 20 through a first Ag/AgCl electrode 4 and a second Ag/AgCl electrode 5, a guide pipe 17 in the water supply device is connected with a pressure sensor 19, and the sample clamping device is connected with an induced polarization instrument 21 through the first Ag/AgCl electrode 4, the second Ag/AgCl electrode 5, a lead 14 and the induced polarization instrument.
As shown in fig. 1, a test sample is loaded into the sample holding means, a test solution is added to the water supply bottle 16, the pressure sensor 19 and the sample holding means are connected using a conduit 17, the sample holding means and the sensitive voltmeter 20 are connected using a lead according to a connection (1), and the sample holding means and the laser meter 21 are connected using a lead according to a connection (2). When a Zeta potential test is carried out, a loop (1) is switched on; when an excitation test is carried out, the loop (2) is switched on; when the permeability test is performed, the stopwatch 23 and the measuring cylinder 22 are used to close the circuit (1) and the circuit (2).
As shown in fig. 2, the test sample loading flow is as follows: fixing a first Ag/AgCl electrode 4 and a second Ag/AgCl electrode 5 at two ends of a first solution chamber 2 and a second solution chamber 3, screwing a first inverted cone connector 8 and a second inverted cone connector 9, placing a first test electrode copper ring 6 and a second test electrode copper ring 7 at two ends of a central tube 1, placing a sample into the central tube 1, arranging O-shaped waterproof gaskets 12 at two ends, and fixing the first solution chamber 2 and the second solution chamber 3 at two ends of the central tube 1 respectively through threads, so that the first solution chamber 2, the second solution chamber 3 and the central tube 1 are integrated.
As shown in fig. 1-2, the Zeta potential flow of the test sample is as follows: connecting the filled sample clamping device with a sensitive voltmeter 20 according to a loop (1), connecting the filled sample clamping device with a water supply bottle 16 through a conduit 17 and a pressure sensor 19, opening a water stop valve 18 to record the readings of the sensitive voltmeter 20 and the pressure sensor 19, changing the water head height of the water supply bottle 16 for three times through a telescopic bracket 15, and recording data of three groups of sensitive voltmeter 20 and pressure sensor 19 shown in fig. 3, wherein a in fig. 3 represents the pressure value recorded by the pressure sensor 19, and b in fig. 3 represents the voltage value recorded by the sensitive voltmeter 20, and the data are obtained through the formula C = delta E/delta P, namely: and obtaining a flow potential coefficient C by the ratio of the voltage change value to the pressure change value, and then substituting the flow potential coefficient into a Helmholtz-Smoluchowschi (H-S) equation to calculate the corresponding Zeta potential of the sample surface.
As shown in fig. 1, the flow of the test sample excitation signal is as follows: connecting the filled sample clamping device with an excitation instrument 21 according to a loop (2), connecting the sample clamping device with a water supply bottle 16 through a guide pipe 17, opening a water stop valve 18 to allow a test solution to pass through the sample clamping device, closing the water stop valve 18 when the sample clamping device is filled with a test liquid, opening a measurement switch of the excitation instrument 21 to start measuring sample excitation information, and recording excitation data of the measurement sample into a computer to obtain a real part S 'and an imaginary part S' of an excitation signal shown in figure 4 after the measurement is finished.
As shown in fig. 1-2, the test sample permeability flow is as follows: the filled sample clamping device is connected with a water supply bottle 16 through a conduit 17 and a pressure sensor 19, a water stop valve 18 is opened to allow a test solution to pass through the sample clamping device, when the test liquid can pass through the sample clamping device at a constant speed, a stopwatch 23 and a volumetric flask 22 are used for recording the volume of the solution in a certain time at the outlet of the conduit, the numerical value of the pressure sensor 19 at the height is recorded, the water head height of the water supply bottle 16 for three times is changed through a telescopic support 15, the numerical values of three groups of pressures and the volume of the solution in unit time are recorded, data are recorded into a computer after the test is finished, and then the sample permeability as shown in fig. 5 is obtained through Darcy's law.
The invention has the beneficial effects that: greatly saves the cost of the electricity and structural tests of the experimental sample and obtains better effect under the condition of ensuring low cost. Rock samples with different sizes can be measured, and granular samples and fibrous samples can also be measured. The Zeta potential, the induced polarization signal and the permeability data of the sample can be measured under the condition that the sample is filled only once, the joint analysis of multiple physical parameters is realized, and the scientific research is facilitated.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A rock sample Zeta electric potential, induced polarization signal and permeability multi-parameter measuring platform is characterized in that: the method comprises the following steps:
the sample clamping device is used for fixing a sample to be detected;
the water supply device is used for continuously providing the test solution;
the Zeta potential measuring system is used for measuring a Zeta potential of the sample;
the excitation measuring system is used for measuring an excitation signal of the sample;
a permeability measurement system for measuring the permeability of the sample;
the sample clamping device is respectively connected with the water supply device, the Zeta potential measuring system, the induced polarization measuring system and the permeability measuring system;
the sample holding device comprises: the measuring device comprises a central tube (1), a first solution chamber (2), a second solution chamber (3), a first Ag/AgCl electrode (4), a second Ag/AgCl electrode (5), a first measuring electrode copper ring (6), a second measuring electrode copper ring (7), a first inverted cone joint (8), a second inverted cone joint (9), a first pagoda joint (10), a second pagoda joint (11) and two pairs of O-shaped waterproof gaskets (12), wherein the central tube (1) is fixedly connected with the first solution chamber (2) and the second solution chamber (3) on the two sides through threads, the first solution chamber (2) and the second solution chamber (3) are connected with the first pagoda joint (10) and the second pagoda joint (11) through the threads, the first Ag/AgCl electrode (4), the second Ag/AgCl electrode (5) are connected with the first solution chamber (2) and the second solution chamber (3) through the first inverted cone joint (8) and the second inverted cone joint (9), the first measuring electrode copper ring (6) and the second measuring electrode copper ring (7) are located at two ends of the central tube (1), and small holes (13) are arranged at two ends of the central tube (1) and are connected with wires.
2. The multi-parameter measurement platform for the Zeta potential, the induced polarization signal and the permeability of the rock sample as claimed in claim 1, wherein: the water supply device includes: telescopic bracket (15), water supply bottle (16) and pipe (17), be connected through couple (24) between water supply bottle (16) and telescopic bracket (15), and water supply bottle (16) bottom is connected with pipe (17), telescopic bracket (15) are used for adjusting vertical height, be equipped with stop valve (18) on pipe (17) for whether control solution circulates.
3. The multi-parameter measurement platform for the Zeta potential, the induced polarization signal and the permeability of the rock sample as claimed in claim 2, wherein: the sample holding device and the water supply device are connected by a conduit (17).
4. The multi-parameter measurement platform for the Zeta potential, the induced polarization signal and the permeability of the rock sample as claimed in claim 1, wherein: the Zeta potential measuring system comprises: a pressure sensor (19) and a sensitive voltmeter (20).
5. The rock sample Zeta potential, induced polarization signal and permeability multiparameter measuring platform of claim 4, wherein: the induced polarization measurement system comprises: an electriferous instrument (21).
6. The multi-parameter measurement platform for the Zeta potential, the induced polarization signal and the permeability of the rock sample as claimed in claim 1, wherein: the permeability measurement system includes: a measuring cylinder (22) and a stopwatch (23).
7. The rock sample Zeta potential, induced polarization signal and permeability multiparameter measuring platform of claim 5, wherein: sample clamping device and Zeta electric potential measurement system pass through Ag AgCl electrode one (4), ag AgCl electrode two (5) and are connected with sensitive voltmeter (20), and pipe (17) among the water supply installation are connected with pressure sensor (19), sample clamping device passes through Ag AgCl electrode one (4), ag AgCl electrode two (5), wire (14) and sharp electrograph (21) and connects.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210262837.8A CN114609201B (en) | 2022-03-17 | 2022-03-17 | Rock sample Zeta electric potential, induced polarization signal and permeability multi-parameter measuring platform |
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| CN202210262837.8A CN114609201B (en) | 2022-03-17 | 2022-03-17 | Rock sample Zeta electric potential, induced polarization signal and permeability multi-parameter measuring platform |
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