Device and method for measuring electrical parameters of loose sedimentary layer rock sample

Abstract

The invention discloses a loose sedimentary layer rock sample electrical parameter measuring device, which comprises a test box body, partition plates divide the internal space of the test box body into a plurality of layers, and the adjacent layers are isolated by an impermeable material with corresponding resistivity. Sand grains with different grades are put into each layer according to a geologic model, solutions with different mineralization degrees are injected according to hydrogeological survey data, and geologic models with different solid geometric forms are molded, so that the geologic models of water bodies with various stratigraphic structures, particle sizes and different mineralization degrees for indoor experiments are formed, and two power supply electrodes are placed on a test box body; the signal source is connected with the two power supply electrodes to establish a stable excitation signal field source; the receiving electrode is placed on the test box body and is coupled with the experimental test medium, and the receiver is connected with the receiving electrode to obtain electrical parameters. According to the invention, geologic models of water bodies with various stratigraphic structures, particle sizes and different mineralization degrees can be formed, and multi-dimensional, multi-scale and multi-offset observation can be carried out.

Description

Technical Field

[0001] The invention relates to the field of solid earth physics, and in particular to a device and method for measuring electrical parameters of loose sedimentary layer rock sample specimens. Background Art

[0002] In the exploration of groundwater in loose sedimentary layers, the stratification of salt and fresh water resources and the delineation of groundwater resources that meet national standards are an important part of the field practice of the electrical (magnetic) method, and also one of the difficulties.

[0003] The field practice of the electrical (magnetic) method mainly studies the electrical parameter indicators of rocks with different physical properties in nature, and based on this, makes a comprehensive judgment based on the electrical parameter indicators and geological conditions to infer the type of underground medium and the spatial distribution information of underground medium. The main physical factors affecting the electrical parameter indicators of groundwater in loose sedimentary layers are the particle size of the sedimentary layer, the mineralization of groundwater, that is, the sedimentary conditions and the total soluble solid content.

[0004] In order to provide regional geological and hydrological data for electrical (magnetic) exploration of resources, the traditional method is mainly to conduct regional hydrogeological surveys, that is, to investigate the exposed stratigraphic information in the region, collect water samples from different areas of regional wells, springs, and surface water for hydrochemical analysis, and form survey information of each sampling point on the regional plane to assist in the interpretation of electrical (magnetic) data and geological interpretation; however, the results of electrical (magnetic) exploration work mainly solve regional geological problems on lines and surfaces. Due to limited conditions, it is based on data support and speculation at hydrogeological survey points, resulting in no indoor geological model-geophysical experimental data support for salt and fresh water stratification or effective delineation of groundwater sources. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a device for measuring electrical parameters of loose sedimentary layer rock samples with a simple structure, stability and reliability, and provides a method for measuring electrical parameters of loose sedimentary layer rock samples.

[0006] The technical solution of the present invention to solve the above technical problems is: a device for measuring electrical parameters of loose sedimentary rock sample specimens, including a test box, a power supply electrode, a signal source, a receiving electrode and a receiver, the test box is spliced ​​by an insulating top plate, a bottom plate, a front side plate, a rear side plate, a left side plate and a right side plate, a plurality of reserved holes are arranged in the middle of the front side plate, the rear side plate, the left side plate and the right side plate according to a set size, the reserved holes are blocked by sealing plugs, and a plurality of rows of hollows are arranged on the top plate; a plurality of brackets for supporting partitions are fixedly arranged from top to bottom in the test box, and partitions are arranged on the brackets, and the partitions divide the internal space of the test box into a plurality of layers, and adjacent layers are isolated by anti-penetration materials with corresponding resistivity, Sand particles of different grades are placed in each layer according to the geological model, and solutions of different mineralization degrees are injected according to the hydrogeological survey data to shape geological models of different three-dimensional geometric forms, thereby forming geological models of various stratigraphic structures, particle sizes, and water bodies of different mineralization degrees for indoor experiments; according to experimental requirements and designs, the two power supply electrodes are placed in the corresponding reserved holes of the left and right plates, in pairs on the front side plates, in pairs on the rear side plates, and in pairs on the top plates, and the signal source is connected to the two power supply electrodes to establish a stable excitation signal field source; the receiving electrode is placed on the test box and coupled with the experimental test medium, and the receiver is connected to the receiving electrode to obtain electrical parameters.

[0007] In the above-mentioned loose sedimentary layer rock sample electrical parameter measuring device, the receiving electrodes are placed in pairs on the front side plate, in pairs on the rear side plate, in pairs in the hollow area of ​​the top plate, or in pairs on the reserved holes corresponding to the front side plate and the rear side plate.

[0008] In the above-mentioned loose sedimentary layer rock sample electrical parameter measuring device, the receiving electrodes are placed in an array on the reserved holes of the front side plate, in an array on the reserved holes of the rear side plate, in an array on the hollow area of ​​the top plate, or in an array on the reserved holes corresponding to the front side plate and the rear side plate.

[0009] In the above-mentioned loose sedimentary layer rock sample electrical parameter measuring device, the reserved holes on each side plate are arranged in a matrix on the entire side plate.

[0010] The electrical parameter measuring device for loose sedimentary layer rock sample specimens has scales on the sides of the front side plate, the rear side plate, the left side plate and the right side plate.

[0011] In the above-mentioned device for measuring electrical parameters of loose sedimentary rock sample specimens, the top plate adopts a movable connection form, and a ruler is provided at the edge of the hollow position on the top plate.

[0012] The above-mentioned loose sedimentary layer rock sample electrical parameter measurement device uses a single test box to measure the electrical parameters of loose sedimentary layer rocks. For the observation of electrical parameter characteristics of large-scale multi-layer geological models, multiple test box plates are spliced ​​according to actual needs to increase the geometric size.

[0013] A method for measuring electrical parameters of loose sedimentary rock samples comprises the following steps: Step 1: Assemble the bottom plate, front side plate, rear side plate, left side plate, and right side plate to form a test box with an upper opening; Step 2: Use sealing plugs to seal all the reserved holes on the front side panel, rear side panel, left side panel, and right side panel; Step 3: According to the experimental design requirements, the internal space of the test box is divided into multiple layers with partitions, and adjacent layers are isolated with anti-permeability materials of corresponding resistivity. Sand particles of different gradations are placed in each layer according to the geological model, and solutions of different mineralization degrees are injected according to the hydrogeological survey data to shape geological models of different three-dimensional geometric forms, thereby forming geological models of various stratigraphic structures, particle sizes, and water bodies of different mineralization degrees for indoor experiments; Step 4: Place the top plate movable cover on the upper opening of the test box; Step 5: Arrange the power supply electrodes according to the experimental design requirements, pull out the sealing plugs in the two corresponding reserved holes on the left and right plates, and seal the two power supply electrodes in the two corresponding reserved holes on the left and right plates with plasticine, and the two power supply electrodes are in contact with the medium in the corresponding layer. The signal generated by the signal source is connected through the power supply electrodes from the front side plate, rear side plate, top plate or the left and right end faces corresponding to the left and right plates of the test box in any way to establish a stable excitation signal field source; Step 6: Arrange the receiving electrodes according to the experimental design requirements, and place the receiving electrodes in pairs in the hollow area of ​​the top plate, the front side plate, the rear side plate, and the corresponding reserved holes of the front side plate and the rear side plate. Obtain the electric field signal through the receiving electrodes and connect it to the receiver to obtain electrical parameters.

[0014] In the above-mentioned method for measuring electrical parameters of loose sedimentary rock samples, the specific steps of step 3 are: S31: According to the geological model, the first graded sand is placed at the bottom of the test box, and the first mineralization solution is injected, and then the partition is covered and isolated with an anti-permeability material with corresponding resistivity to obtain the first layer at the bottom; S32: According to the geological model, the second graded sand is placed on the partition, and the second mineralization solution is injected, and then the partition is covered and isolated with an anti-permeability material with corresponding resistivity to obtain the second layer; S33: Repeat step S32 for multiple times to form geological models of various stratum structures, particle sizes, and water bodies with different mineralizations for indoor experiments.

[0015] In the above-mentioned method for measuring electrical parameters of loose sedimentary rock samples, the specific steps of step 6 are: S61: Pull out the sealing plugs in the two reserved holes on the front side plate, seal the two receiving electrodes in the two reserved holes on the front side plate with plasticine, obtain the electric field signal through the receiving electrodes and connect to the receiver, so as to obtain the electrical parameters; S62: Pull out the sealing plugs in the two reserved holes on the rear side plate, seal the two receiving electrodes in the two reserved holes on the rear side plate with plasticine, obtain the electric field signal through the receiving electrodes and connect it to the receiver, so as to obtain the electrical parameters; S63: Connect two receiving electrodes to two hollow areas of the top plate respectively, obtain electric field signals through the receiving electrodes and connect them to a receiver, thereby obtaining electrical parameters; S64: Pull out the sealing plugs in the two corresponding reserved holes on the front side plate and the rear side plate, and seal the two receiving electrodes in the two corresponding reserved holes on the front side plate and the rear side plate with plasticine, respectively, and obtain the electric field signal through the receiving electrodes and connect to the receiver to obtain the electrical parameters; S65: placing receiving electrodes in an array on the reserved holes of the front side plate, obtaining electric field signals through the receiving electrodes and connecting them to a receiver, thereby obtaining electrical parameters; S66: placing receiving electrodes in an array on the reserved holes of the rear side plate, obtaining electric field signals through the receiving electrodes and connecting them to a receiver, thereby obtaining electrical parameters; S67: placing receiving electrodes in an array manner in the hollow area of ​​the top plate, obtaining electric field signals through the receiving electrodes and connecting them to a receiver, thereby obtaining electrical parameters; S68: placing receiving electrodes in an array at corresponding positions of the front side plate and the rear side plate, obtaining electric field signals through the receiving electrodes and connecting them to a receiver, thereby obtaining electrical parameters; S69: Repeat steps S61 to S68 to send an excitation signal once, and multiple receivers perform multi-dimensional, multi-scale, and multi-offset observations to form electrical parameter characterization information of undiagenerated rocks in loose sedimentary layers in three-dimensional space.

[0016] The beneficial effects of the present invention are: 1. The present invention uses partitions to divide the internal space of the test box into multiple layers, and adjacent layers are isolated by anti-penetration materials with corresponding resistivity. Sand particles of different grades are placed in each layer according to the geological model, and solutions of different mineralization degrees are injected according to the hydrogeological survey data to shape geological models with different three-dimensional geometric shapes, thereby forming geological models of various stratigraphic structures, particle sizes, and water bodies with different mineralization degrees for indoor experiments.

[0017] 2. Arrange the power supply electrodes and the receiving electrodes according to the experimental design requirements. The signal generated by the signal source is connected through the power supply electrodes from the left and right end faces of the test box, or from the front side plate, or from the rear side plate, or from the top plate in any way. After establishing a stable excitation signal field source, the receiving electrodes can be placed in pairs in the reserved holes corresponding to the front side plate and the rear side plate, in pairs in the reserved holes on the front side plate, in pairs in the reserved holes on the rear side plate, and in pairs in the hollow area of ​​the top plate according to the observation design requirements; they can also be placed in the reserved holes of the front side plates placed in pairs, in the reserved holes of the rear side plates placed in pairs, in the hollow area of ​​the top plate in arrays according to different scale sizes, and in the corresponding positions of the front side plates and the rear side plates in arrays. Through this multi-dimensional, multi-scale, and multi-offset observation, the electrical parameter characterization information of the undiagenerated rocks in the loose sedimentary layer in three-dimensional space is formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the electrical parameter measuring device for loose sedimentary layer rock sample specimens of the present invention.

[0019] Figure 2 for Figure 1 Top view of the hollow measuring box.

[0020] Figure 3 for Figure 1 Schematic diagram of the structure of the middle top plate.

[0021] Figure 4 for Figure 1 Schematic diagram of the structure of the center front side panel.

[0022] Figure 5 The present invention is a flow chart of the method for measuring electrical parameters of loose sedimentary layer rock samples. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] like Figure 1-Figure 4As shown, a device for measuring electrical parameters of loose sedimentary rock specimens comprises a test box 5, a power supply electrode 1, a signal source 2, a receiving electrode 3 and a receiver 4. The test box 5 is composed of an insulating top plate 7, a bottom plate, a front side plate, a rear side plate, a left side plate and a right side plate. A plurality of reserved holes 6 are arranged in the middle of the front side plate, the rear side plate, the left side plate and the right side plate according to a set size. The reserved holes 6 are blocked by sealing plugs. A plurality of rows of hollows 8 are arranged on the top plate 7. A plurality of brackets 9 for supporting partitions are fixedly arranged from top to bottom in the test box 5. A partition is arranged on the bracket 9. The partition divides the internal space of the test box 5 into a plurality of layers. The space between adjacent layers is The anti-seepage materials with corresponding resistivity are used for isolation. Sand particles of different gradations are placed in each layer according to the geological model, and solutions of different mineralization degrees are injected according to the hydrogeological survey data to shape geological models with different three-dimensional geometric shapes, thereby forming geological models of various stratigraphic structures, particle sizes, and water bodies with different mineralization degrees for indoor experiments; in the embodiment, two power supply electrodes 1 are respectively arranged in the reserved holes 6 corresponding to the left plate and the right plate, and the signal source 2 is connected to the two power supply electrodes 1 to establish a stable excitation signal field source; the receiving electrode 3 is placed on the test box 5 and coupled with the experimental test medium, and the receiver 4 is connected to the receiving electrode 3 to obtain electrical parameters.

[0025] Corresponding resistivity means: groundwater resources are generally composed of shallow to deep groundwater and confined water. Taking the Quaternary loose sedimentary layer groundwater as an example, there is generally a transition zone with lower resistance between groundwater bodies under different sedimentary conditions. This transition zone is generally an impermeable layer. During the experiment, it is necessary to establish a hydrogeological-geophysical electrical (magnetic) method model. Assuming that the resistivity of the first layer of the medium is 200 ohm·m, the resistivity of the second layer of the medium is also 200 ohm·m, and the middle area is treated with 100 ohm·m material to form an impermeable layer.

[0026] The receiving electrodes 3 may be placed in pairs on the front side panels, placed in pairs on the rear side panels, placed in pairs on the hollowed-out area of ​​the top panel 7, or placed in pairs on the reserved holes corresponding to the front side panels and the rear side panels. The receiving electrodes 3 may also be placed in an array on the reserved holes of the front side panels, in an array on the reserved holes of the rear side panels, in an array on the hollowed-out area of ​​the top panel 7, or in an array on the reserved holes corresponding to the front side panels and the rear side panels.

[0027] The reserved holes 6 on each side plate are arranged in a matrix on the entire side plate.

[0028] The sides of the front side plate, the rear side plate, the left side plate and the right side plate are provided with scales 10. The top plate 7 is in a movable connection form, and a scale 11 is provided at the edge of the hollow position on the top plate 7.

[0029] A single test box 5 is used to measure the electrical parameters of loose sedimentary layer rocks. For the observation of the electrical parameter characteristics of large-scale multi-layer geological models, when the size of the test box 5 cannot meet the size of the established hydrogeological model, multiple test box 5 plates (i.e., top plate 7, bottom plate, front side plate, rear side plate, left side plate, and right side plate) can be spliced ​​according to actual needs to increase the geometric size.

[0030] like Figure 5 As shown, a method for measuring electrical parameters of loose sedimentary rock samples comprises the following steps: Step 1: Assemble the bottom plate, front side plate, rear side plate, left side plate, and right side plate to form a test box with an upper opening.

[0031] Step 2: Use sealing plugs to seal all the reserved holes on the front side panel, rear side panel, left side panel, and right side panel.

[0032] Step 3: According to the experimental design requirements, the internal space of the test box is divided into multiple layers with partitions, and adjacent layers are isolated with anti-penetration materials of corresponding resistivity. Sand particles of different grades are placed in each layer according to the geological model, and solutions of different mineralization degrees are injected according to the hydrogeological survey data to shape geological models with different three-dimensional geometric shapes, thereby forming geological models of various stratigraphic structures, particle sizes, and water bodies with different mineralization degrees for indoor experiments.

[0033] The specific steps of step three are: S31: According to the geological model, the first graded sand is placed at the bottom of the test box, and the first mineralization solution is injected, and then the partition is covered and isolated with an anti-permeability material with corresponding resistivity to obtain the first layer at the bottom; S32: According to the geological model, the second graded sand is placed on the partition, and the second mineralization solution is injected, and then the partition is covered and isolated with an anti-permeability material with corresponding resistivity to obtain the second layer; S33: Repeat step S32 for multiple times to form geological models of various stratum structures, particle sizes, and water bodies with different mineralizations for indoor experiments.

[0034] Step 4: Place the top plate movable cover on the upper opening of the test box.

[0035] Step 5: Arrange the power supply electrodes according to the experimental design requirements. In the embodiment, the sealing plugs in the two corresponding reserved holes on the left and right plates are pulled out, and the two power supply electrodes are sealed in the two corresponding reserved holes on the left and right plates with plasticine, and the two power supply electrodes are in contact with the medium in the corresponding layer. In actual work, the signal generated by the signal source can also be connected through two power supply electrodes in any of the reserved holes corresponding to the left and right plates, placed in pairs on the front side plate, placed in pairs on the rear side plate, and placed in pairs on the top plate, to establish a stable excitation signal field source.

[0036] Step six: Arrange the receiving electrodes according to the experimental design requirements. The receiving electrodes can be placed in pairs in the hollow area of ​​the top plate, the front side plate, the rear side plate, and the corresponding reserved holes of the front side plate and the rear side plate. The electric field signal is obtained through the receiving electrodes and connected to the receiver to obtain electrical parameters.

[0037] The specific steps of step six are: S61: Pull out the sealing plugs in the two reserved holes on the front side plate, seal the two receiving electrodes in the two reserved holes on the front side plate with plasticine, obtain the electric field signal through the receiving electrodes and connect to the receiver, so as to obtain the electrical parameters; S62: Pull out the sealing plugs in the two reserved holes on the rear side plate, seal the two receiving electrodes in the two reserved holes on the rear side plate with plasticine, obtain the electric field signal through the receiving electrodes and connect it to the receiver, so as to obtain the electrical parameters; S63: Connect two receiving electrodes to two hollow areas of the top plate respectively, obtain electric field signals through the receiving electrodes and connect them to a receiver, thereby obtaining electrical parameters; S64: Pull out the sealing plugs in the two corresponding reserved holes on the front side plate and the rear side plate, and seal the two receiving electrodes in the two corresponding reserved holes on the front side plate and the rear side plate with plasticine, respectively, and obtain the electric field signal through the receiving electrodes and connect to the receiver to obtain the electrical parameters; S65: placing receiving electrodes in an array on the reserved holes of the front side plate, obtaining electric field signals through the receiving electrodes and connecting them to a receiver, thereby obtaining electrical parameters; S66: placing receiving electrodes in an array on the reserved holes of the rear side plate, obtaining electric field signals through the receiving electrodes and connecting them to a receiver, thereby obtaining electrical parameters; S67: placing receiving electrodes in an array manner in the hollow area of ​​the top plate, obtaining electric field signals through the receiving electrodes and connecting them to a receiver, thereby obtaining electrical parameters; S68: placing receiving electrodes in an array at corresponding positions of the front side plate and the rear side plate, obtaining electric field signals through the receiving electrodes and connecting them to a receiver, thereby obtaining electrical parameters; S69: Repeat steps S61 to S68, send the excitation signal once, and use multiple receivers to perform multi-dimensional, multi-scale, and multi-offset observations to form electrical parameter characterization information of undiagenerated rocks in loose sedimentary layers in three-dimensional space.

Claims

1. A device for measuring electrical parameters of loose sedimentary rock samples, comprising a test box, a power supply electrode, a signal source, a receiving electrode and a receiver, characterized in that: The test box is composed of an insulating top plate, a bottom plate, a front side plate, a rear side plate, a left side plate, and a right side plate. A plurality of reserved holes are arranged in the middle of the front side plate, the rear side plate, the left side plate, and the right side plate according to set sizes. The reserved holes are blocked by sealing plugs, and a plurality of rows of hollows are arranged on the top plate. A plurality of brackets for supporting partitions are fixedly arranged from top to bottom in the test box. Partitions are arranged on the brackets. The partitions divide the internal space of the test box into a plurality of layers. Adjacent layers are isolated by anti-penetration materials with corresponding resistivity. Sand particles of different grades are placed in each layer according to the geological model, and different layers are injected according to the hydrogeological survey data. The solution of different mineralization degrees is shaped into geological models of different three-dimensional geometric forms, thereby forming geological models of various stratigraphic structures, particle sizes, and water bodies of different mineralization degrees for indoor experiments; according to the experimental requirements and design, the two power supply electrodes are placed in the corresponding reserved holes of the left plate and the right plate, in pairs on the front plate, in pairs on the rear plate, and in pairs on the top plate. The signal source is connected to the two power supply electrodes to establish a stable excitation signal field source; the receiving electrode is placed on the test box and coupled with the experimental test medium, and the receiver is connected to the receiving electrode to obtain electrical parameters.

2. The electrical parameter measuring device for loose sedimentary rock sample according to claim 1 is characterized in that: The receiving electrodes are placed in pairs on the front side plate, placed in pairs on the rear side plate, placed in pairs in the hollow area of ​​the top plate, or placed in pairs on the reserved holes corresponding to the front side plate and the rear side plate.

3. The electrical parameter measuring device for loose sedimentary rock sample according to claim 1 is characterized in that: The receiving electrodes are placed in an array on the reserved holes of the front side plate, in an array on the reserved holes of the rear side plate, in an array on the hollow area of ​​the top plate, or in an array on the reserved holes corresponding to the front side plate and the rear side plate.

4. The electrical parameter measuring device for loose sedimentary rock specimens according to claim 1 is characterized in that: The reserved holes on each side panel are arranged in a matrix on the entire side panel.

5. The device for measuring electrical parameters of loose sedimentary rock samples according to claim 1, characterized in that: Scales are arranged on the sides of the front side plate, the rear side plate, the left side plate and the right side plate.

6. The device for measuring electrical parameters of loose sedimentary rock samples according to claim 1, characterized in that: The top plate is in a movable connection form, and a ruler is provided at the edge of the hollow position on the top plate.

7. The electrical parameter measuring device for loose sedimentary rock sample according to claim 1, characterized in that: A single test box is used to measure the electrical parameters of loose sedimentary rock. For the observation of electrical parameter characteristics of large-scale multi-layer geological models, the plates of multiple test boxes are spliced ​​together to increase the geometric size according to actual needs.

8. A method for measuring electrical parameters of loose sedimentary layer rock sample specimens according to the device for measuring electrical parameters of loose sedimentary layer rock sample specimens according to claim 1, characterized in that: The following steps are involved: Step 1: Assemble the bottom plate, front side plate, rear side plate, left side plate, and right side plate to form a test box with an upper opening; Step 2: Use sealing plugs to seal all the reserved holes on the front side panel, rear side panel, left side panel, and right side panel; Step 3: According to the experimental design requirements, the internal space of the test box is divided into multiple layers with partitions, and adjacent layers are isolated with anti-permeability materials of corresponding resistivity. Sand particles of different gradations are placed in each layer according to the geological model, and solutions of different mineralization degrees are injected according to the hydrogeological survey data to shape geological models of different three-dimensional geometric forms, thereby forming geological models of various stratigraphic structures, particle sizes, and water bodies of different mineralization degrees for indoor experiments; Step 4: Place the top plate movable cover on the upper opening of the test box; Step 5: Arrange the power supply electrodes according to the experimental design requirements, pull out the sealing plugs in the two corresponding reserved holes on the left and right plates, and seal the two power supply electrodes in the two corresponding reserved holes on the left and right plates with plasticine, and the two power supply electrodes are in contact with the medium in the corresponding layer. The signal generated by the signal source is connected through the power supply electrodes from the front side plate, rear side plate, top plate or the left and right end faces corresponding to the left and right plates of the test box in any way to establish a stable excitation signal field source; Step 6: Arrange the receiving electrodes according to the experimental design requirements, and place the receiving electrodes in pairs in the hollow area of ​​the top plate, the front side plate, the rear side plate, and the corresponding reserved holes of the front side plate and the rear side plate. Obtain the electric field signal through the receiving electrodes and connect it to the receiver to obtain electrical parameters.

9. The method for measuring electrical parameters of loose sedimentary rock samples according to claim 8, characterized in that: The specific steps of step three are: S31: According to the geological model, the first graded sand is placed at the bottom of the test box, and the first mineralization solution is injected, and then the partition is covered and isolated with an anti-permeability material with corresponding resistivity to obtain the first layer at the bottom; S32: According to the geological model, the second graded sand is placed on the partition, and the second mineralization solution is injected, and then the partition is covered and isolated with an anti-permeability material with corresponding resistivity to obtain the second layer; S33: Repeat step S32 for multiple times to form geological models of various stratum structures, particle sizes, and water bodies with different mineralizations for indoor experiments.

10. The method for measuring electrical parameters of loose sedimentary rock samples according to claim 8, characterized in that: The specific steps of step six are: S61: Pull out the sealing plugs in the two reserved holes on the front side plate, seal the two receiving electrodes in the two reserved holes on the front side plate with plasticine, obtain the electric field signal through the receiving electrodes and connect to the receiver, so as to obtain the electrical parameters; S62: Pull out the sealing plugs in the two reserved holes on the rear side plate, seal the two receiving electrodes in the two reserved holes on the rear side plate with plasticine, obtain the electric field signal through the receiving electrodes and connect it to the receiver, so as to obtain the electrical parameters; S63: Connect two receiving electrodes to two hollow areas of the top plate respectively, obtain electric field signals through the receiving electrodes and connect them to a receiver, thereby obtaining electrical parameters; S64: Pull out the sealing plugs in the two corresponding reserved holes on the front side plate and the rear side plate, and seal the two receiving electrodes in the two corresponding reserved holes on the front side plate and the rear side plate with plasticine, respectively, and obtain the electric field signal through the receiving electrodes and connect to the receiver to obtain the electrical parameters; S65: placing receiving electrodes in an array on the reserved holes of the front side plate, obtaining electric field signals through the receiving electrodes and connecting them to a receiver, thereby obtaining electrical parameters; S66: placing receiving electrodes in an array on the reserved holes of the rear side plate, obtaining electric field signals through the receiving electrodes and connecting them to a receiver, thereby obtaining electrical parameters; S67: placing receiving electrodes in an array manner in the hollow area of ​​the top plate, obtaining electric field signals through the receiving electrodes and connecting them to a receiver, thereby obtaining electrical parameters; S68: placing receiving electrodes in an array at corresponding positions of the front side plate and the rear side plate, obtaining electric field signals through the receiving electrodes and connecting them to a receiver, thereby obtaining electrical parameters; S69: Repeat steps S61 to S68 to send an excitation signal once, and multiple receivers perform multi-dimensional, multi-scale, and multi-offset observations to form electrical parameter characterization information of undiagenerated rocks in loose sedimentary layers in three-dimensional space.

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