Electromagnetic wave resistivity logging instrument antenna system adjustable ground verification device and method

Abstract

The invention relates to the technical field of antenna system design verification, in particular to an adjustable ground verification device and method for an antenna system of an electromagnetic wave resistivity logging instrument. Winding a preset number of turns of copper wire coils on the antenna model and installing a magnetizer; fixing the assembled antenna model on the processed scale according to a preset antenna arrangement scheme; connecting cables are arranged along the scales; connecting a connecting cable, and performing functional test and debugging after the connection is completed; an antenna model prototype made of PLA or non-magnetic materials is rapidly manufactured through 3D printing, a modular test system capable of flexibly adjusting the antenna position and the number of turns of coils is constructed, parallel verification of a circuit and a mechanical structure is achieved, the research and development period is greatly shortened, and the research and development efficiency is improved. And the material and processing cost waste caused by repeated design is obviously reduced.

Description

Technical Field

[0001] This invention relates to the field of antenna system design and verification technology, and in particular to an adjustable ground verification device and method for electromagnetic wave resistivity logging instrument antenna systems. Background Technology

[0002] Electromagnetic resistivity logging instruments are key equipment used in oil exploration to assess formation resistivity, and the design of their core antenna system directly determines the instrument's detection accuracy and reliability. Antenna systems typically consist of multiple transmitting and receiving antennas arranged in a specific spatial configuration, requiring efficient transmission and reception of electromagnetic signals in complex downhole environments. In traditional design processes, the development and verification of antenna structure, spatial layout, and electronic circuitry are often mutually constrained, making it a complex process involving multiple disciplines and requiring iterative optimization.

[0003] Existing antenna design verification methods have significant limitations. Circuit testing is typically performed on the final machined metal parts, resulting in a sequential relationship between machining and circuit development. If test results are unsatisfactory, modifications are extremely costly and time-consuming. The fixed antenna position and the difficulty in modifying coil parameters online make the optimization process inefficient and lacking in data guidance. Furthermore, the test platform is often crudely constructed, with connecting cables frequently exposed around the antenna, introducing additional electromagnetic interference that severely impacts the accuracy and reliability of test data, leaving subsequent design optimizations without a reliable and effective basis.

[0004] This invention provides instrument R&D teams with an effective solution for functional verification in a ground-based environment by constructing a modular, flexibly adjustable rapid prototyping system. 3D printing technology is used to rapidly manufacture various types of non-magnetic material antenna models. Combined with a graduated scale, detachable fixing mechanism, and built-in wiring channels, a test platform supporting flexible adjustment of antenna position and coil turns is built. Through a data-driven iterative testing method, adjustments are made while testing, enabling parallel development and rapid verification of circuit and mechanical structures. This fundamentally shortens the R&D cycle and reduces development costs and risks. Summary of the Invention

[0005] To overcome the problems mentioned in the background art, this invention proposes an antenna system design verification device suitable for electromagnetic wave resistivity measuring instruments. This device can be used as a testing tool for antenna systems after manufacturing, efficiently and accurately testing and evaluating the performance indicators (such as gain, impedance matching, self-resonant frequency, etc.) of the finished antenna system. It can also be applied during the antenna system design stage, enabling rapid and low-cost verification of the feasibility and performance expectations of the design scheme. By simulating actual working conditions or comparing test data, it effectively identifies design defects or deviations. This verification capability, spanning the entire design-manufacturing process, significantly reduces the risk of repeated modifications, rework, or even design failures due to discrepancies between design expectations and actual application results. This avoids the resulting huge R&D costs and wasted production resources, and is of great significance for improving the R&D efficiency and product reliability of electromagnetic wave resistivity measuring instruments.

[0006] The technical solution of this invention is: an adjustable ground verification method for electromagnetic wave resistivity logging instrument antenna systems, comprising the following steps: S11: Design the antenna according to the requirements to obtain the antenna design scheme. The antenna design scheme includes the number of transmitting antennas, the number of receiving antennas, the types of antennas, and the preset antenna arrangement scheme. The preset arrangement scheme includes the spacing and spatial orientation configuration of the transmitting and receiving antennas. S12: Fabricate antenna models, scales, and support bases according to the number of transmitting antennas, the number of receiving antennas, and the type of antennas in the antenna design scheme; S13: Wrap a copper wire coil with a preset number of turns around the antenna model and install a magnetic conductor to assemble the antenna model; S14: Fix the assembled antenna model onto the processed scale according to the preset antenna arrangement scheme; S15: Arrange the connecting cables along the ruler and thread the connecting cables through the pre-set holes on the ruler; S16: Connect the connecting cable, and perform functional testing and debugging after the connection is completed.

[0007] Preferably, when assembling the antenna model, a detachable fixing material is used to fix the copper wire coil. The detachable fixing material is either cable ties or polyimide tape. After fixing the assembled antenna model onto the processed scale according to the preset antenna arrangement scheme, the method also includes applying anti-displacement constraints to the antenna model.

[0008] Preferably, when processing the antenna model, the types of antenna models include horizontal antennas, radial antennas, symmetrical angled antennas, angled antennas, and cross antennas. The antenna model is processed by 3D printing, and the material of the antenna model is PLA material and one of other non-magnetic materials.

[0009] Preferably, functional testing and debugging include the following: S21: Controls the transmitting antenna to transmit electromagnetic wave signals; S22: Controls multiple receiving antennas to synchronously receive electromagnetic wave signals emitted by the transmitting antenna, and collects and records the waveform data of the electromagnetic wave signals; S23: Compare and analyze the waveform data of electromagnetic wave signals received by multiple receiving antennas and electromagnetic wave signals emitted by transmitting antennas to obtain the phase difference and amplitude attenuation characteristics of the signals. S24: Based on the phase difference and amplitude attenuation characteristics of the acquired signal, analyze and adjust the position of the transmitting antenna, the position of the receiving antenna, and the number of coil turns; S25: Repeat steps S21-S24 for iterative optimization until the amplitude and phase characteristics of the received signal meet the preset indicators.

[0010] The electromagnetic wave resistivity logging instrument antenna system is an adjustable ground verification device, including a support base, a scale, and an antenna model. The support base is configured in at least two sets, with the two sets of support bases respectively located at both ends of the bottom surface of the scale. The antenna model is configured in multiple sets, each of which has a perforation inside. The multiple sets of antenna models are fitted onto the scale through the perforations, and the scale has graduation markings.

[0011] Preferably, a base is provided on the bottom surface of the support, a fixing block is provided on the top surface of the support, an arc-shaped groove is provided on the top surface of the fixing block, a positioning pin is provided inside the arc-shaped groove, multiple sets of positioning pins are provided, and multiple sets of positioning holes are opened on the bottom surface of the scale, with the positioning pins inserted into the positioning holes.

[0012] Preferably, the scale is configured as a cylindrical structure, with a wiring groove on the side wall of the scale, a positioning surface on the side of the scale opposite to the wiring groove, and a fixing surface opposite to the positioning surface on the inner side wall of the perforation.

[0013] Preferably, the antenna model includes an antenna body, a magnetic conductor, and an antenna coil. The perforation is formed inside the antenna body, and multiple sets of mounting slots are formed on the side wall of the antenna body. Each antenna model includes multiple sets of magnetic conductors, which are respectively disposed inside the multiple sets of mounting slots. The antenna coil is wound around the outside of the magnetic conductor.

[0014] Preferably, the scale also includes a circuit module, which is provided with a transmitting circuit and a receiving circuit, and the circuit module is located at one end of the scale.

[0015] The beneficial effects of this invention are: 1. Compared with existing technologies that typically rely on the completion of overall metal machining before circuit testing, which has the disadvantages of long development cycles, high trial and error costs, and extreme difficulty in modification, this solution innovatively uses 3D printing to quickly manufacture antenna model prototypes of PLA or non-magnetic materials, and builds a modular testing system that includes flexibly adjustable antenna positions and coil turns, realizing parallel verification of circuit and mechanical structures, thereby greatly shortening the R&D cycle and significantly reducing the waste of materials and processing costs caused by design iterations; 2. This invention constructs a physical platform with flexibly adjustable parameters and stable operation during testing by using detachable coil fixing methods with cable ties or tape, scaled positioning, and anti-displacement constraints of the antenna fixing device. Combined with a data-driven iterative optimization method based on phase and amplitude characteristics, it achieves precise and rapid optimization of antenna spacing, azimuth, and electrical parameters, greatly improving the efficiency of design verification and the reliability of optimization results. 3. This invention, by designing a ruler structure with internal perforations, dedicated wiring channels, and positioning surfaces, mandates that all connecting cables be built inside the ruler and integrates transmitting and receiving circuit modules, thus constructing a highly integrated and well-shielded testing environment. This fundamentally eliminates interference from external wiring to electromagnetic signals, ensuring the accuracy and consistency of test data and providing a key guarantee for obtaining truly reliable optimization results. Attached Figure Description

[0016] Figure 1 The diagram shown is a schematic representation of the principle structure of the adjustable ground verification device for the electromagnetic wave resistivity logging instrument antenna system of the present invention. Figure 2 The diagram shown is a schematic representation of the radial structure of the scale in the adjustable ground verification device for the electromagnetic wave resistivity logging instrument antenna system of the present invention. Figure 3 The diagram shown is a radial cross-sectional view of the antenna model in the adjustable ground verification device for the electromagnetic wave resistivity logging instrument antenna system of the present invention. Figure 4 The diagram shown is a three-dimensional structural schematic of the antenna model in the adjustable ground verification device for the electromagnetic wave resistivity logging instrument antenna system of the present invention. Figure 5 The diagram shown is a schematic diagram of the design principle of the electromagnetic wave resistivity drilling instrument in Embodiment 1 of the present invention. Figure 6 The image shown is an electromagnetic wave waveform obtained before the antenna position and coil turns were adjusted in Embodiment 1 of the present invention. Figure 7 The image shown is an electromagnetic wave waveform obtained after adjusting the antenna position and the number of coil turns in Embodiment 1 of the present invention. Figure 8The diagram shown is an antenna position distribution diagram obtained after functional testing and debugging in Embodiment 1 of the present invention. Figure 9 The diagram shown is a planar structural schematic of the electromagnetic wave resistivity drilling instrument in Embodiment 1 of the present invention.

[0017] Explanation of reference numerals in the attached drawings: 1. Support base; 2. Scale; 3. Antenna model; 4. Perforation; 9. Wiring groove; 10. Positioning surface; 11. Fixing surface; 12. Antenna body; 13. Magnetic conductor; 14. Antenna coil; 15. Mounting slot. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Please see Figures 1-4 This invention provides an embodiment of an adjustable ground verification method for an electromagnetic wave resistivity logging instrument antenna system, comprising the following steps: S11: Design the antenna according to the requirements to obtain the antenna design scheme. The antenna design scheme includes the number of transmitting antennas, the number of receiving antennas, the types of antennas, and the preset antenna arrangement scheme. The preset arrangement scheme includes the spacing and spatial orientation configuration of the transmitting and receiving antennas. S12: Fabricate antenna models, scales, and support bases according to the number of transmitting antennas, the number of receiving antennas, and the type of antennas in the antenna design scheme; S13: Wrap a copper wire coil with a preset number of turns around the antenna model and install a magnetic conductor to assemble the antenna model; S14: Fix the assembled antenna model onto the processed scale according to the preset antenna arrangement scheme; S15: Arrange the connecting cables along the ruler and thread the connecting cables through the pre-set holes on the ruler; S16: Connect the connecting cable, and perform functional testing and debugging after the connection is completed.

[0020] In this embodiment, the number, type, and arrangement of antennas are first determined according to design requirements; then, the corresponding antenna models, scales, and support components are fabricated; after completing coil winding, magnetic conductor installation, and antenna assembly, the antenna modules are fixed to the scale according to a preset scheme; after standard wiring through the internal perforations of the scale, system integration and functional testing are performed; through a modular and adjustable physical testing platform, parallel verification of circuit design and mechanical structure is achieved, reducing cost waste and time delays caused by later design modifications, and effectively improving the efficiency and reliability of antenna system optimization.

[0021] When assembling the antenna model, the copper wire coil is fixed with a detachable fixing material, which is either cable ties or polyimide tape. After fixing the assembled antenna model to the processed scale according to the preset antenna arrangement, the antenna model is also subjected to anti-displacement constraints.

[0022] In this embodiment, during the antenna model assembly process, detachable fixing materials such as cable ties or polyimide tape are used to fix the coil. After the antenna module is installed on the scale according to the preset arrangement, a special anti-displacement constraint is applied. The detachable fixing method enables rapid and flexible adjustment of the number of coil turns. Combined with the anti-displacement constraint, the stability of the antenna's spatial position during the test is ensured. This not only significantly improves the efficiency of antenna parameter iterative optimization, but also ensures the reliability and consistency of test data, effectively avoiding repeated debugging and material waste caused by displacement errors.

[0023] When fabricating antenna models, the types of antenna models include horizontal antennas, radial antennas, symmetrical angled antennas, angled antennas, and cross antennas. The antenna models are fabricated using 3D printing, and the material of the antenna models is PLA or one of other non-magnetic materials.

[0024] In this embodiment, 3D printing enables rapid and low-cost prototyping of complex antenna structures. The application of non-magnetic materials completely eliminates the interference of the model itself on the electromagnetic field, ensuring the accuracy and reliability of the test data. This provides an efficient physical basis for parallel comparative research and performance optimization of various antenna structures.

[0025] Functional testing and debugging specifically include: S21: Controls the transmitting antenna to transmit electromagnetic wave signals; S22: Controls multiple receiving antennas to synchronously receive electromagnetic wave signals emitted by the transmitting antenna, and collects and records the waveform data of the electromagnetic wave signals; S23: Compare and analyze the waveform data of electromagnetic wave signals received by multiple receiving antennas and electromagnetic wave signals emitted by transmitting antennas to obtain the phase difference and amplitude attenuation characteristics of the signals. S24: Based on the phase difference and amplitude attenuation characteristics of the acquired signal, analyze and adjust the position of the transmitting antenna, the position of the receiving antenna, and the number of coil turns; S25: Repeat steps S21-S24 for iterative optimization until the amplitude and phase characteristics of the received signal meet the preset indicators.

[0026] In this embodiment, as described above, the functional testing and debugging process specifically includes: controlling the transmitting antenna to transmit signals and having multiple receiving antennas simultaneously collect waveform data; dynamically analyzing and adjusting the antenna position and coil turns by comparing the phase difference and amplitude attenuation characteristics of the transmitted and received signals; continuously correcting parameters using an iterative optimization method until preset indicators are met; and establishing a closed-loop optimization mechanism of test-analysis-adjustment to achieve precise and rapid debugging of antenna system parameters. This not only significantly improves the efficiency of electromagnetic wave propagation characteristic optimization but also effectively avoids the blindness of relying on experience-based debugging in traditional methods through data-driven dynamic adjustment, significantly improving the reliability and verification efficiency of instrument design.

[0027] The electromagnetic wave resistivity logging instrument antenna system is an adjustable ground verification device, including a support base 1, a scale 2, and an antenna model 3. The support base 1 is configured in at least two sets, with the two sets of support base 1 respectively located at both ends of the bottom surface of the scale 2. The antenna model 3 is configured in multiple sets, with perforations 4 opened inside each set of antenna models 3. The multiple sets of antenna models 3 are fitted onto the scale 2 through the perforations 4. The scale 2 has scale markings.

[0028] The support base 1 supports the scale 2, allowing the scale 2 and the antenna model 3 on the scale 2 to be suspended in the air. This allows different objects to be placed below or next to the antenna model 3 for ground performance calibration and testing of electromagnetic wave resistivity. The scale markings on the scale 2 are used to measure the distance between each antenna model 3. This facilitates installation according to the design scheme and makes it convenient to record data during and after debugging.

[0029] The support base 1 has a base on its bottom surface and a fixing block on its top surface. The fixing block has an arc-shaped groove on its top surface and a positioning pin inside the arc-shaped groove. The positioning pins are arranged in multiple sets. The scale 2 has multiple sets of positioning holes on its bottom surface and the positioning pins are inserted into the positioning holes.

[0030] The base supports the support seat 1 and fixes it to the ground. The arc-shaped groove can be used to position the scale 2 and cooperate with the cylindrical structure of the scale 2 to better fix the scale 2. The positioning pin and the positioning hole on the bottom surface of the scale 2 can completely fix the scale 2 and facilitate disassembly for the installation and removal of the antenna module.

[0031] The scale 2 is configured as a cylindrical structure, and a wiring groove 9 is provided on the side wall of the scale 2. A positioning surface 10 is provided on the side of the scale 2 opposite to the wiring groove 9. A fixing surface 11 is provided on the inner side wall of the through hole 4 opposite to the positioning surface 10.

[0032] The cable routing groove 9 allows the connecting cable to pass through the groove instead of the outer surface of the antenna model 3, thus preventing signal transmission. The positioning surface 10 and the fixing surface 11 prevent the antenna model 3 from rotating on the scale 2 and affecting the test results.

[0033] The antenna model 3 includes an antenna body 12, a magnetic conductor 13, and an antenna coil 14. The perforation 4 is opened inside the antenna body 12. Multiple sets of mounting slots 15 are opened on the side wall of the antenna body 12. Each antenna model 3 includes multiple sets of magnetic conductors 13. The multiple sets of magnetic conductors 13 are respectively arranged inside the multiple sets of mounting slots 15. The antenna coil 14 is wound around the outside of the magnetic conductors 13.

[0034] Among them, the antenna body 12 is the core support structure of the antenna model 3. The magnetic conductor 13 can be accurately positioned through the mounting slot 15. The magnetic conductor 13 is used to efficiently converge and guide magnetic lines of force and increase the signal of the antenna coil 14.

[0035] Preferably, the system also includes a circuit module, which is provided with a transmitting circuit and a receiving circuit, and the circuit module is located at one end of the scale 2.

[0036] In the arrangement of finished instruments, due to internal space limitations, the electronic circuit part and the transmitting coil are generally placed separately. During the test, this restriction does not apply. However, the electromagnetic wave is emitted radially. Therefore, the circuit module is placed at both ends of the scale 2 to reduce the interference of the circuit module on the electromagnetic field.

[0037] Example 1 Please see Figures 5-9 When electromagnetic waves propagate through strata, the changes in phase and amplitude are mainly influenced by the formation conductivity (the reciprocal of resistivity) and the formation dielectric constant. Formation conductivity reflects the formation's ability to conduct current, while the formation dielectric constant reflects its ability to store charge. Electromagnetic resistivity measurement while drilling (EMR) is an indirect measurement method that measures the response of electromagnetic wave propagation in the formation. Typically, one transmitting antenna and two receiving antennas are used. By measuring the phase difference and amplitude attenuation of the induced electromotive force in the formation through the two receiving antennas R1 and R2, the resistivity value corresponding to the phase difference and amplitude ratio is obtained after data processing. When electromagnetic waves pass through conductive strata, the signal amplitude attenuates exponentially. The source distances of the near-receiving coil R1 and the far-receiving coil R2 from the transmitting coil T1 are different, resulting in different signal attenuation. Therefore, the amplitude and phase of the electromagnetic wave signal measured by the near and far receiving coils are also different.

[0038] Based on this principle and characteristic, we designed and developed an electromagnetic wave resistivity drilling instrument. This instrument has 12 electromagnetic coils, including six transmitting antennas and six receiving antennas, as shown in the attached diagram. Figure 5 As shown.

[0039] As attached Figure 5 As shown, the instrument has a total of 12 coils. Coil R is the receiving coil, and coil T is the transmitting coil. In design and use, generally one coil transmits and two coils receive, or one coil transmits and six coils receive. The distance between the receiving and transmitting coils varies, resulting in different signal phases. Furthermore, during the implementation of the circuit system, errors in electronic components, the difference between the designed and actual values ​​of the electromagnetic coils, and errors in the manufacturing process all affect signal integrity. Therefore, before processing the drill rod, the circuit system and coils need to undergo functional verification testing, and adjustments are made accordingly based on the test results. In the actual R&D process, different antenna modules are cut and designed, and 3D printed using replacement materials. After processing, all antenna segments are arranged according to the design scheme, and the circuit system is connected. The schematic diagram after arrangement is shown below. Figure 6 As shown.

[0040] After installation according to the design drawings, functional testing and debugging were performed before any adjustments were made to the antenna position and circuit system. Signal transmission was performed using antenna T1, and reception was achieved using antennas R1 and R2. The initial received signal is shown in the attached figure. Figure 7 As shown, after adjusting the circuit system and the antenna position and number of turns, the test pattern is as follows. Figure 8 As shown.

[0041] After adjusting the circuit, it can be seen that... Figure 8 Compared to Figure 7 The received signal amplitude showed a significant improvement, and the phase also changed due to the position change. Using this method, we tested and adjusted simultaneously, successively adjusting the positions of other antennas and determining their final locations. Figure 9 As shown.

[0042] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An adjustable ground verification device for electromagnetic wave resistivity logging instrument antenna system, characterized in that: The device includes a support base (1), a scale (2), and an antenna model (3). The support base (1) is configured in at least two sets, with the two sets of support bases (1) respectively located at both ends of the bottom surface of the scale (2). The antenna model (3) is configured in multiple sets, with perforations (4) opened inside each set of antenna models (3). The multiple sets of antenna models (3) are fitted onto the scale (2) through the perforations (4). The scale (2) has graduation markings.

2. The adjustable ground verification device for electromagnetic wave resistivity logging instrument antenna system according to claim 1, characterized in that: The support base (1) has a base on its bottom surface and a fixing block on its top surface. The fixing block has an arc-shaped groove on its top surface and a positioning pin inside the arc-shaped groove. The positioning pin is set in multiple sets. The scale (2) has multiple sets of positioning holes on its bottom surface and the positioning pin is inserted into the positioning hole.

3. The adjustable ground verification device for electromagnetic wave resistivity logging instrument antenna system according to claim 1, characterized in that: The scale (2) is configured as a cylindrical structure. A wiring groove (9) is provided on the side wall of the scale (2). A positioning surface (10) is provided on the side of the scale (2) opposite to the wiring groove (9). A fixing surface (11) is provided on the inner side wall of the perforation (4) opposite to the positioning surface (10).

4. The adjustable ground verification device for electromagnetic wave resistivity logging instrument antenna system according to claim 1, characterized in that: The antenna model (3) includes an antenna body (12), a magnetic conductor (13) and an antenna coil (14). The perforation (4) is opened inside the antenna body (12). Multiple sets of mounting slots (15) are opened on the side wall of the antenna body (12). Each antenna model (3) includes multiple sets of magnetic conductors (13), and the multiple sets of magnetic conductors (13) are respectively set inside the multiple sets of mounting slots (15).

5. The adjustable ground verification device for electromagnetic wave resistivity logging instrument antenna system according to claim 4, characterized in that: The antenna coil (14) is wound around the outside of the magnetic conductor (13).

6. The adjustable ground verification device for electromagnetic wave resistivity logging instrument antenna system according to claim 1, characterized in that: It also includes a circuit module, which is provided with a transmitting circuit and a receiving circuit, and the circuit module is located at one end of the scale (2).

7. An adjustable ground verification method for electromagnetic wave resistivity logging instrument antenna systems, characterized in that: Includes the following steps: S11: Design the antenna according to the requirements to obtain the antenna design scheme. The antenna design scheme includes the number of transmitting antennas, the number of receiving antennas, the types of antennas, and the preset antenna arrangement scheme. The preset arrangement scheme includes the spacing and spatial orientation configuration of the transmitting and receiving antennas. S12: Fabricate antenna models, scales, and support bases according to the number of transmitting antennas, the number of receiving antennas, and the type of antennas in the antenna design scheme; S13: Wrap a copper wire coil with a preset number of turns around the antenna model and install a magnetic conductor to assemble the antenna model; S14: Fix the assembled antenna model onto the processed scale according to the preset antenna arrangement scheme; S15: Arrange the connecting cables along the ruler and thread the connecting cables through the pre-set holes on the ruler; S16: Connect the connecting cable, and perform functional testing and debugging after the connection is completed.

8. The adjustable ground verification method for electromagnetic wave resistivity logging instrument antenna system according to claim 7, characterized in that: When assembling the antenna model, the copper wire coil is fixed with a detachable fixing material, which is either cable ties or polyimide tape. After fixing the assembled antenna model to the processed scale according to the preset antenna arrangement, the antenna model is also subjected to anti-displacement constraints.

9. The adjustable ground verification method for electromagnetic wave resistivity logging instrument antenna system according to claim 8, characterized in that: When fabricating antenna models, the types of antenna models include horizontal antennas, radial antennas, symmetrical angled antennas, angled antennas, and cross antennas. The antenna models are fabricated using 3D printing, and the material of the antenna models is PLA or one of other non-magnetic materials.

10. The adjustable ground verification method for electromagnetic wave resistivity logging instrument antenna system according to claim 9, characterized in that: Functional testing and debugging specifically include: S21: Controls the transmitting antenna to transmit electromagnetic wave signals; S22: Controls multiple receiving antennas to synchronously receive electromagnetic wave signals emitted by the transmitting antenna, and collects and records the waveform data of the electromagnetic wave signals; S23: Compare and analyze the waveform data of electromagnetic wave signals received by multiple receiving antennas and electromagnetic wave signals emitted by transmitting antennas to obtain the phase difference and amplitude attenuation characteristics of the signals. S24: Based on the phase difference and amplitude attenuation characteristics of the acquired signal, analyze and adjust the position of the transmitting antenna, the position of the receiving antenna, and the number of coil turns; S25: Repeat steps S21-S24 for iterative optimization until the amplitude and phase characteristics of the received signal meet the preset indicators.

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