Modular array acoustic logging physical simulation experiment system and measurement method

Abstract

The invention provides a modularized array acoustic logging physical simulation experiment system and a measuring method.The system comprises an acoustic system module and a traction positioning module, the acoustic system module comprises an acoustic system transmitting module, an acoustic system receiving module and a connecting piece, and the acoustic system transmitting module and the acoustic system receiving module are connected through the connecting piece; the distance between the acoustic system transmitting module and the acoustic system receiving module can be adjusted on the connecting piece; the traction positioning module comprises a transmission belt and a transmission device, and the transmission device drives the transmission belt to move so as to pull the acoustic system transmitting module and the acoustic system receiving module to move in the well hole through the transmission belt. Modular design is adopted, array acoustic wave physical experiment measurement in multiple modes such as multiple transmitting and multiple receiving can be achieved, the device is suitable for well hole rock models of any size, acoustic logging physical simulation experiment measurement in multiple modes such as high precision and rapid multiple transmitting and multiple receiving can be carried out under the condition that an acoustic wave probe is in a good center or set eccentricity condition, and the measurement accuracy is high. And the measurement accuracy of the acoustic logging experiment of the horizontal well is improved.

Description

Technical Field

[0001] The present invention relates to the field of oil and gas reservoir exploration technology, which belongs to or can be directly applied to the fields of geophysics, exploration geophysics, geophysical logging, rock physics, etc. The present invention particularly relates to a modular array acoustic logging physical simulation experimental system and a measurement method. Background Art

[0002] Unconventional oil reservoirs (such as low permeability oil reservoirs) have broad prospects for exploration and development. However, due to poor reservoir conditions and single and backward development technology, the development effect of low permeability oil reservoirs has been less than ideal, which has greatly hindered the development level of oil and gas. It is urgent to solve the development problems of unconventional oil and gas reservoirs.

[0003] For unconventional reservoirs, due to their poor reservoir properties, the porosity is generally less than 10%, the pore throat diameter is less than 1μm or the air permeability is less than 0.1mD. The low porosity and permeability will make it difficult to obtain natural industrial production of unconventional oil and gas reservoirs using traditional technologies. Unconventional oil and gas reservoirs have two key characteristics: large-scale continuous distribution of oil and gas reservoirs, unclear closure boundaries, and unclear Darcy seepage. Therefore, the development of unconventional oil and gas reservoirs needs to seek further reforms in petroleum technology and apply emerging technologies to the development of unconventional oil and gas fields.

[0004] As an emerging technology, horizontal well technology not only effectively solves the development problems of unconventional oil and gas reservoirs, but also greatly increases oil and gas production. However, the equipment and methods for processing acoustic logging in horizontal wells are not yet mature and complete. Many methods are directly borrowed from the methods used in vertical wells for processing. However, due to the huge differences between horizontal wells and vertical wells, the results of acoustic logging processing in horizontal wells often do not match the actual situation, and the accuracy is greatly reduced. In order to improve the equipment and methods for acoustic logging in horizontal wells, physical experiments and numerical simulation experiments are very necessary. Up to now, although a large number of scholars have done a lot of research on related work (for example: in 2008, Cong Jiansheng et al. simulated and calculated the acoustic velocity logging response when the horizontal well bore passes through the formation interface; in 2013, Li Ruifeng et al. used finite difference simulation to calculate the acoustic field of CBL-VDL logging at two source distances of 3ft and 5ft under the conditions of casing eccentricity and cuttings bed in the horizontal well section; in 2013, Chen Muyin et al. studied the relationship between the acoustic time difference measured in horizontal wells and vertical wells through experimental methods to analyze the acoustic velocity logging response under horizontal well conditions. In 2016, Zhang Pengyun et al. analyzed the influencing factors of acoustic logging response characteristics of horizontal wells such as borehole and anisotropy, and proposed to use rock physics experimental method and statistical translation method to correct the acoustic time difference curve of horizontal wells, etc. However, the existing technology has not studied the influence of instrument eccentricity and borehole irregularity on acoustic wave propagation, nor the influence of the above factors on acoustic wave amplitude and other properties. Therefore, conducting physical simulation experiments and numerical simulation experiments is a key step to improve the interpretation of horizontal well acoustic logging data.

[0005] At present, there are many numerical simulation experiments and corresponding results of acoustic logging, but there are few studies on physical simulation experiments of acoustic logging response in horizontal wells. Compared with numerical simulation, physical simulation is closer to the actual logging conditions. In order to better show the characteristics of acoustic logging response and verify the accuracy of numerical simulation experiments, physical simulation experiments are a key link. Therefore, it is very necessary to carry out relevant research and development work on physical simulation experimental equipment and experimental measurement methods as the basis of physical simulation experiments.

[0006] Therefore, the inventor, relying on many years of experience and practice in related industries, proposes a modular array acoustic logging physical simulation experimental system and measurement method to overcome the defects of the prior art. Summary of the invention

[0007] The purpose of the present invention is to provide a modular array acoustic logging physical simulation experimental system and a measurement method, which forms an experimental system in a modular assembly manner, and after the assembly of each functional module is completed, it can ensure that the acoustic probe is in the center or a pre-set eccentric position in the wellbore, thereby achieving the purpose of high-precision, fast multi-transmission and multi-reception and other modes of acoustic logging physical simulation experimental measurement, and improving the accuracy of horizontal well acoustic logging experimental measurement.

[0008] Another object of the present invention is to provide a modular array acoustic logging physical simulation experiment system and measurement method. By adjusting the distance between the acoustic system transmitting module and the acoustic system receiving module, the measurement of different sound source distances in the wellbore can be realized to obtain full-well section waveforms of multiple different sound source distances, and then the array acoustic logging physical simulation experiment measurement formed by a single transmitting sound wave, multiple receiving sound waves or multiple transmitting sound waves and multiple receiving sound waves can be realized, thereby improving the accuracy of the logging results.

[0009] The purpose of the present invention can be achieved by adopting the following scheme:

[0010] The present invention provides a modular array acoustic wave logging physical simulation experiment system, which comprises an acoustic system module and a traction positioning module.

[0011] The acoustic system module includes an acoustic system transmitting module for emitting acoustic wave signals, an acoustic system receiving module for receiving acoustic wave signals, and a connecting piece, wherein the acoustic system transmitting module is connected to the acoustic system receiving module through the connecting piece, and the distance between the acoustic system transmitting module and the acoustic system receiving module can be adjusted on the connecting piece;

[0012] The traction positioning module includes a transmission belt and a transmission device that can drive the transmission belt to move. The acoustic system transmitting module and the acoustic system receiving module are respectively connected to the two ends of the transmission belt. The transmission device drives the transmission belt to move, so as to pull the acoustic system transmitting module and the acoustic system receiving module to a preset position in the wellbore through the transmission belt.

[0013] In a preferred embodiment of the present invention, the acoustic transmitting module and the acoustic receiving module both include an acoustic wave probe and at least two clamping devices, the two clamping devices are adapted to be clamped at the two ends of the acoustic wave probe or at positions close to the two ends, and the clamping devices are used to clamp the acoustic wave probe and support the acoustic wave probe in the wellbore;

[0014] The acoustic wave probe in the acoustic system transmitting module is used to transmit acoustic wave signals;

[0015] The sound wave probe in the sound system receiving module is used to receive sound wave signals.

[0016] In a preferred embodiment of the present invention, the acoustic wave probe in the acoustic system transmitting module and the acoustic wave probe in the acoustic system receiving module are both monopole probes or dipole probes;

[0017] Alternatively, the acoustic wave probe in the acoustic transmitting module and the acoustic wave probe in the acoustic receiving module, one is a monopole probe and the other is a dipole probe.

[0018] In a preferred embodiment of the present invention, the acoustic wave probe includes a cylindrical probe vibration source part and two probe frames, and the two probe frames are respectively arranged at two ends of the probe vibration source part, and the probe vibration source part is supported by the probe frames.

[0019] In a preferred embodiment of the present invention, the clamping device comprises a clamping body, the outer contour of the clamping body is adapted to the inner wall of the wellbore, a plurality of probe clamping holes at different positions are arranged inside the clamping body, the probe clamping holes are adapted to the outer contour of the probe skeleton, so that the probe skeleton part of the acoustic wave probe can be clamped in the probe clamping holes, and the acoustic wave probe can be installed in any of the probe clamping holes to achieve centered or eccentric clamping of the acoustic wave probe;

[0020] The clamping member body is provided with a notch which is in communication with the probe clamping hole, and the notch is located to form a wire groove for laying out the signal wire of the acoustic wave probe.

[0021] In a preferred embodiment of the present invention, the two clamping devices are respectively clamped on the two probe skeleton parts on the same acoustic wave probe;

[0022] The clamp body is provided with a plurality of connection holes spaced apart along its circumference, and the two clamping devices can be connected to the two opposite connection holes on the clamp body via a connection screw to fix the two clamping devices in connection.

[0023] In a preferred embodiment of the present invention, the clamping device in the acoustic transmitting module is connected to the clamping device in the acoustic receiving module via the connecting screw, and the connecting screw is the connecting member;

[0024] The distance between the acoustic transmitting module and the acoustic receiving module can be adjusted on the connecting screw.

[0025] In a preferred embodiment of the present invention, the modular array acoustic logging physical simulation experiment system also includes a container containing liquid and a wellbore rock model, the wellbore is opened on the wellbore rock model along the horizontal direction, and the wellbore rock model is arranged in the container and is located below the liquid level of the liquid.

[0026] In a preferred embodiment of the present invention, the transmission device comprises a crossbeam, an adjustment arm, a first support arm and a second support arm, wherein the adjustment arm is arranged above the crossbeam, and the bottom end of the adjustment arm is connected to the crossbeam, the first support arm and the second support arm are both located below the crossbeam, and the top end of the first support arm and the top end of the second support arm are respectively connected to the crossbeam;

[0027] The top end of the adjusting arm is rotatably provided with a first transmission wheel, the top end and the bottom end of the first supporting arm are respectively rotatably provided with a second transmission wheel and a third transmission wheel, the top end and the bottom end of the second supporting arm are respectively rotatably provided with a fourth transmission wheel and a fifth transmission wheel, the sound system module is located between the third transmission wheel and the fifth transmission wheel, and the transmission belt passes through the third transmission wheel, the second transmission wheel, the first transmission wheel, the fourth transmission wheel and the fifth transmission wheel in sequence and is connected to the sound system module;

[0028] The adjusting arm is a retractable structure to adjust the tightness of the transmission belt;

[0029] The height of the crossbeam can be adjusted so that the bottoms of the third transmission wheel and the fifth transmission wheel are on the same horizontal line as the central axis of the wellbore.

[0030] In a preferred embodiment of the present invention, the transmission belt has a scale, and the first support arm and / or the second support arm is provided with a scale pointer, and the scale pointer is used to point to the scale on the transmission belt at a corresponding position.

[0031] In a preferred embodiment of the present invention, the acoustic wave probe is electrically connected to the acoustic wave excitation and receiving module, and the acoustic wave excitation and receiving module is electrically connected to the signal acquisition module and the oscilloscope module respectively.

[0032] The present invention provides a measurement method for a modular array acoustic logging physical simulation experiment, which uses the above-mentioned modular array acoustic logging physical simulation experiment system to carry out an acoustic logging experiment of a horizontal well. The measurement method comprises the following steps:

[0033] Step S1: placing a wellbore rock model in a container containing liquid, wherein the wellbore on the wellbore rock model extends in a horizontal direction and is located below the liquid surface;

[0034] Step S2: installing a traction positioning module;

[0035] Step S3: connecting the acoustic system transmitting module and the acoustic system receiving module through a connecting piece to form an acoustic system module, and connecting the acoustic system transmitting module and the acoustic system receiving module to two ends of the transmission belt respectively, wherein there is a first initial source distance between the acoustic system transmitting module and the acoustic system receiving module;

[0036] Step S4: electrically connecting the acoustic wave probe in the acoustic system transmitting module and the acoustic wave probe in the acoustic system receiving module to the acoustic wave excitation and receiving module respectively;

[0037] Step S5: adjusting the transmission belt to be in a tensioned state, and driving the acoustic transmitting module and the acoustic receiving module to move to a preset position in the wellbore through the transmission belt;

[0038] Step S6: recording the position data of the preset position, and stimulating the acoustic wave probe in the acoustic system transmitting module to transmit an acoustic wave signal through the acoustic wave excitation and receiving module, and receiving the acoustic wave signal through the acoustic wave probe in the acoustic system receiving module and recording it;

[0039] Step S7: moving the acoustic system transmitting module and the acoustic system receiving module to the next preset position within the wellbore at a preset distance, and repeating the operation of step S6;

[0040] Step S8: Repeat the operation of step S7 until the transmission and reception of the acoustic wave signals at all preset positions in the wellbore are completed to obtain the waveform of the entire well section.

[0041] In a preferred embodiment of the present invention, after step S8, the following steps are further included:

[0042] Step S9: adjusting the distance between the acoustic system transmitting module and the acoustic system receiving module to a second initial source distance;

[0043] Step S10: Repeat steps S5 to S8 to obtain full-well waveforms with different initial source distances.

[0044] In a preferred embodiment of the present invention, after step S10, the operations of step S9 to step S10 are repeated multiple times to obtain multiple full-well waveforms with different initial source distances.

[0045] In a preferred embodiment of the present invention, after obtaining multiple full-well section waveforms with different initial source distances, the multiple full-well section waveforms are filtered; and the multiple full-well section waveforms at the same position in the wellbore are respectively extracted to obtain a horizontal well array acoustic logging data set formed by a transmitted sound wave, multiple received sound waves, or a combination of multiple transmitted sound waves and multiple received sound waves.

[0046] In a preferred embodiment of the present invention, in step S6, the acoustic wave signal is received by a signal acquisition module and the waveform is displayed and digitally acquired through an oscilloscope module.

[0047] As described above, the characteristics and advantages of the modular array acoustic logging physical simulation experimental system and measurement method of the present invention are:

[0048] The acoustic system module includes an acoustic system transmitting module for emitting acoustic wave signals and an acoustic system receiving module for receiving acoustic wave signals. The acoustic system transmitting module and the acoustic system receiving module are connected through a connecting piece. During the experiment, the two ends of the transmission belt of the traction and positioning module can be connected to the acoustic system transmitting module and the acoustic system receiving module respectively, and the transmission belt is driven to move by the transmission device of the traction and positioning module, so as to achieve the purpose of the transmission belt pulling the acoustic system transmitting module and the acoustic system receiving module to move to a preset position in the wellbore. After reaching the preset position, the acoustic wave signal is emitted by the acoustic system transmitting module, and the acoustic wave signal is received by the acoustic system receiving module, and the emitted and received acoustic waves are recorded and compared and analyzed, so as to achieve the purpose of the acoustic well logging material simulation experiment measurement;

[0049] In addition, during the experiment, the distance between the acoustic system transmitting module and the acoustic system receiving module can be adjusted by adjusting the positions of the acoustic system transmitting module and the acoustic system receiving module on the connecting piece. When adjusting the distance between the acoustic system transmitting module and the acoustic system receiving module to different distances, the transmission and reception of acoustic wave signals at all preset positions in the wellbore can be realized by emitting and receiving acoustic wave signals, and multiple full-well section waveforms can be obtained. Multiple full-well section waveforms at the same position in the wellbore can be extracted respectively, and finally the purpose of obtaining a horizontal well array acoustic logging data set formed by one transmitting sound wave, multiple receiving sound waves or a combination of multiple transmitting sound waves and multiple receiving sound waves is achieved.

[0050] At the same time, the experimental system of the present invention has a simple structure and is easy to assemble and maintain; more importantly, the experimental system, in conjunction with the measurement scheme, can use the same acoustic system transmitting module and acoustic system receiving module to implement multi-transmit and multi-receive array waveform experimental measurements, perfectly avoiding the interference caused by differences in response consistency between different acoustic system transmitting modules and acoustic system receiving modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The following drawings are only intended to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0052] in:

[0053] Figure 1 : It is one of the structural schematic diagrams of the modular array acoustic logging physical simulation experimental system of the present invention.

[0054] Figure 2: This is the second structural schematic diagram of the modular array acoustic logging physical simulation experimental system of the present invention.

[0055] Figure 3 : It is a structural schematic diagram of the modular array acoustic logging physical simulation experimental system of the present invention in the state where the acoustic system module and the traction positioning module are connected.

[0056] Figure 4 : A stereoscopic diagram of an acoustic wave probe in the modular array acoustic wave logging physical simulation experimental system of the present invention.

[0057] Figure 5 : This is one of the stereoscopic views of the clamping device in the modular array acoustic logging physical simulation experimental system of the present invention.

[0058] Figure 6 : This is the second stereoscopic view of the clamping device in the modular array acoustic logging physical simulation experimental system of the present invention.

[0059] Figure 7 : It is a stereoscopic diagram of an acoustic system transmitting module or an acoustic system receiving module in the modular array acoustic logging physical simulation experimental system of the present invention.

[0060] Figure 8 : It is a stereoscopic diagram of the acoustic system module in the modular array acoustic logging physical simulation experimental system of the present invention.

[0061] Fig. 9 : It is a flowchart of the measurement method of the modular array acoustic logging physical simulation experiment of the present invention.

[0062] Fig.10 : It is the measured waveform diagram of the modular array acoustic logging physical simulation experimental system and measurement method of the present invention.

[0063] The accompanying drawings in the present invention are:

[0064] 1. Acoustic system module; 101. Acoustic system transmitting module;

[0065] 102. Sound system receiving module; 103. Connecting piece;

[0066] 104. sonic probe; 1041. probe vibration source part;

[0067] 1042. probe frame; 105. clamping device;

[0068] 1051. Clamping part body; 1052. Probe clamping hole;

[0069] 1053, wire trough; 1054, connection hole;

[0070] 2. Traction positioning module; 201. Transmission belt;

[0071] 202, transmission device; 2021, beam;

[0072] 2022. Adjusting arm; 2023. First supporting arm;

[0073] 2024. second supporting arm; 2025. first transmission wheel;

[0074] 2026, second transmission wheel; 2027, third transmission wheel;

[0075] 2028, fourth transmission wheel; 2029, fifth transmission wheel;

[0076] 2030, third supporting arm; 2031, base;

[0077] 203, scale pointer; 204, rocker arm;

[0078] 3. Wellbore rock model; 301. Wellbore;

[0079] 4. Container; 5. Liquid level;

[0080] 6. Sound wave excitation and receiving module; 7. Signal acquisition module;

[0081] 8. Oscilloscope module; 9. Host computer. DETAILED DESCRIPTION

[0082] In order to improve the accuracy of horizontal well acoustic logging and better serve oilfield development and production, it is necessary to conduct forward simulation research on horizontal well acoustic logging, study the propagation law of acoustic waves in horizontal wells under different geological conditions and the influence of horizontal well measurement environment on acoustic logging signals, so as to study suitable horizontal well acoustic logging methods and correction methods. Physical simulation experiments are one of the key means to study logging response characteristics and improve horizontal well acoustic logging, and the acoustic system device of acoustic logging physical simulation experiments and the corresponding array acoustic logging physical simulation experiment measurement scheme are the basis for physical simulation experiments. Existing array acoustic logging physical simulation experiments often build a borehole rock model that is close to the actual borehole size, and use the actual array acoustic logging instrument to conduct simulated logging experiments on the ground. However, this type of experiment has the following shortcomings: 1) The borehole rock model is large in size and very expensive; 2) The experimental process requires the support of professional logging vehicles, logging instruments, logging professional operators, etc., the experimental process is cumbersome, the experimental measurement efficiency is low, and the cost is high; 3) The borehole rock model is difficult to replace and the cost is high, which is not convenient for studying the logging response characteristics of borehole rock models with different characteristics. The above problems can be overcome well by using the principle of acoustic similarity to carry out array acoustic logging physical simulation experiments in scaled borehole rock models. However, there is currently no acoustic system and supporting experimental system and method that can be used for array acoustic logging physical simulation experiments in scaled borehole rock models.

[0083] The present invention provides a modular array acoustic logging physical simulation experimental system and a measurement method, which can be applied to wellbore rock models of any size and can realize high-precision and fast acoustic logging physical simulation experimental measurement under the condition of good centering of the acoustic probe.

[0084] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0085] Implementation Method 1

[0086] like Figures 1 to 8 As shown, the present invention provides a modular array acoustic wave logging physical simulation experiment system, which includes an acoustic system module 1 and a traction positioning module 2, wherein the acoustic system module 1 includes an acoustic system transmitting module 101 for emitting acoustic wave signals, an acoustic system receiving module 102 for receiving acoustic wave signals, and a connecting member 103, the acoustic system transmitting module 101 and the acoustic system receiving module 102 are connected through the connecting member 103, and the distance between the acoustic system transmitting module 101 and the acoustic system receiving module 102 can be adjusted on the connecting member 103 to realize the acoustic wave logging physical simulation experiment at different source distances; the traction positioning module 2 includes a transmission belt 201 and a transmission member that can drive the transmission belt 201 to move After the acoustic transmitter module 101 and the acoustic receiver module 102 are connected through the connector 103, the acoustic transmitter module 101 and the acoustic receiver module 102 are respectively connected to the two ends of the transmission belt 201, and the transmission device 202 drives the transmission belt 201 to move, so as to pull the acoustic transmitter module 101 and the acoustic receiver module 102 to the preset position in the wellbore 301 through the transmission belt 201. When the transmission belt 201 is in a tensioned state and the transmission belt 201 stops moving, the preset positions of the acoustic transmitter module 101 and the acoustic receiver module 102 in the wellbore 301 do not move, so that the acoustic transmitter module 101 and the acoustic receiver module 102 can be positioned and measured in the wellbore 301.

[0087] In the present invention, the acoustic module 1 includes an acoustic transmitting module 101 for emitting acoustic wave signals and an acoustic receiving module 102 for receiving acoustic wave signals. The acoustic transmitting module 101 and the acoustic receiving module 102 are connected by a connecting piece 103. During the experiment, the two ends of the transmission belt 201 of the traction and positioning module 2 can be connected to the acoustic transmitting module 101 and the acoustic receiving module 102 respectively, and the transmission belt 201 is driven to move by the transmission device 202 of the traction and positioning module 2, so as to achieve the purpose of the transmission belt 201 pulling the acoustic transmitting module 101 and the acoustic receiving module 102 to move to a preset position in the wellbore 301. After reaching the preset position, the acoustic wave signal is emitted by the acoustic transmitting module 101, and the acoustic wave signal is received by the acoustic receiving module 102, and the emitted and received acoustic waves are analyzed. Recording and comparative analysis are performed to achieve the purpose of acoustic logging material simulation experiment measurement; in addition, during the experiment, the present invention can adjust the positions of the acoustic transmitting module 101 and the acoustic receiving module 102 on the connecting piece 103 to achieve the purpose of adjusting the distance between the acoustic transmitting module 101 and the acoustic receiving module 102. When adjusting the acoustic transmitting module 101 and the acoustic receiving module 102 to have different distances, by sending and receiving acoustic signals, the emission and reception of acoustic signals at all preset positions in the wellbore 301 can be realized, and multiple full-well section waveforms are obtained, and multiple full-well section waveforms at the same position in the wellbore 301 are extracted respectively, so as to finally achieve the purpose of obtaining horizontal well array acoustic logging data with one acoustic wave transmitting source and multiple acoustic wave receiving sources.

[0088] In an optional embodiment of the present invention, Figure 7 , Figure 8 As shown, both the acoustic transmitter module 101 and the acoustic receiver module 102 include an acoustic probe 104 and at least two clamping devices 105. The two clamping devices 105 are adapted to be clamped at the two ends of the acoustic probe 104 or at positions close to the two ends. The clamping devices 105 are used to clamp the acoustic probe 104 and support the acoustic probe 104 in the wellbore 301. The acoustic transmitter module 101 and the acoustic receiver module 102 are structurally identical, and the difference is only that the functions of the acoustic probes 104 in the acoustic transmitter module 101 and the acoustic receiver module 102 are different. The acoustic probe 104 in the acoustic transmitter module 101 is used to transmit acoustic signals, and the acoustic probe 104 in the acoustic receiver module 102 is used to receive acoustic signals.

[0089] Furthermore, the acoustic probe 104 in the acoustic transmitting module 101 and the acoustic probe 104 in the acoustic receiving module 102 are both monopole probes or dipole probes; or, the acoustic probe 104 in the acoustic transmitting module 101 and the acoustic probe 104 in the acoustic receiving module 102, one is a monopole probe and the other is a dipole probe. In the actual acoustic signal transmission process, a monopole probe can be used to transmit the acoustic signal and a monopole probe can be used to receive the acoustic signal; a monopole probe can also be used to transmit the acoustic signal and a dipole probe can be used to receive the acoustic signal; a dipole probe can also be used to transmit the acoustic signal and a monopole probe can be used to receive the acoustic signal; a dipole probe can also be used to transmit the acoustic signal and a dipole probe can be used to receive the acoustic signal, and a variety of acoustic wave transmission and reception schemes can be used, thereby enriching the diversity of array acoustic logging physical simulation experiments.

[0090] In an optional embodiment of the present invention, Figure 4 As shown, the sound wave probe 104 includes a cylindrical probe vibration source part 1041 and two probe skeletons 1042. The two probe skeletons 1042 are respectively fixedly mounted on the two ends of the probe vibration source part 1041. The probe vibration source part 1041 is supported by the probe skeletons 1042 to increase the strength of the sound wave probe 104. The probe vibration source part 1041 can be used to transmit or receive sound waves. The probe vibration source part 1041 and the two probe skeletons 1042 cooperate to form a cylindrical sound wave probe 104. Among them, the probe vibration source part 1041 can be a piezoelectric crystal, which can convert electrical energy into sound wave energy, and can also convert received sound waves into electrical energy.

[0091] The diameter of the acoustic wave probe 104 is smaller than the inner diameter of the wellbore 301. In a specific embodiment, the diameter of the acoustic wave probe 104 may be, but not limited to, 14 mm, and the inner diameter of the wellbore 301 may be, but not limited to, 40 mm.

[0092] Furthermore, the outer wall of the acoustic wave probe 104 may be covered with a waterproof film, so that the acoustic wave probe 104 has waterproof capability, and the acoustic wave probe 104 can be placed in a liquid environment to work, so as to achieve the purpose of a real model well environment.

[0093] In an optional embodiment of the present invention, Figure 5 , Figure 7 As shown, the clamping device 105 includes a disc-shaped clamping body 1051, the outer contour of which is adapted to the inner wall of the wellbore 301, so as to ensure that the clamping device 105 clamps the acoustic wave probe 104 into the wellbore 301, and the outer wall of the clamping body 1051 can fit with the inner wall of the wellbore 301, thereby ensuring the stability of the placement of the acoustic wave probe 104 in the wellbore 301. Figure 5As shown, a probe clamping hole 1052 is provided in the middle position of the clamping body 1051, and the probe clamping hole 1052 is adapted to the outer contour of the probe skeleton 1042 (that is, the aperture of the probe clamping hole 1052 is equal to the outer diameter of the probe skeleton 1042), so that the probe skeleton 1042 part of the acoustic wave probe 104 can be clamped in the probe clamping hole 1052; a notch connected to the probe clamping hole 1052 is provided on one side of the clamping body 1051 located at the probe clamping hole 1052, and a wire groove 1053 for arranging the signal line of the acoustic wave probe 104 is formed at the position of the notch, thereby facilitating the routing of the signal line of the acoustic wave probe 104.

[0094] In another embodiment of the present invention, Figure 6 As shown, the interior of the clamp body 1051 may be provided with a plurality of probe clamping holes 1052 at different positions, and each probe clamping hole 1052 is respectively adapted to the outer contour of the probe frame 1042, so that the probe frame 1042 of the acoustic wave probe 104 can be partially clamped in the probe clamping hole 1052, so that the acoustic wave probe 104 can be installed in any probe clamping hole 1052, and the acoustic wave probe 104 can be clamped in the center or at an eccentric position at a preset position, thereby meeting different experimental requirements. Figure 6 As shown, the multiple probe clamping holes 1052 can be multiple circular holes distributed on the clamping body 1051, and the probe clamping holes 1052 are connected to each other, and at least one probe clamping hole 1052 is connected to a notch on the clamping body 1051. The position of the notch forms a wire groove 1053 for laying out the signal line of the acoustic wave probe 104. The acoustic wave probe 104 can be selectively clamped in any probe clamping hole 1052 according to actual experimental needs, thereby realizing the radial center setting of the acoustic wave probe 104 in the wellbore 301 or setting it at a preset eccentric position in the wellbore 301.

[0095] Further, such as Figure 7 As shown, the two clamping devices 105 are respectively clamped on two probe skeletons 1042 parts on the same acoustic wave probe 104 to ensure stable clamping of one acoustic wave probe 104 and positioning in the wellbore 301 .

[0096] Further, such as Figures 5 to 8As shown, the clamping member body 1051 is provided with a plurality of connection holes 1054 spaced apart along its circumferential direction, and the two clamping devices 105 can be connected to the two clamping member bodies 1051 through a connection screw in the opposite connection holes 1054, so as to fix the two clamping devices 105. By setting the length of the connection screw, the connection screw can not only connect the two clamping devices 105, but also connect the clamping device 105 in the acoustic transmitter module 101 with the clamping device 105 in the acoustic receiver module 102 (that is, the clamping device 105 in the acoustic transmitter module 101 and the clamping device 105 in the acoustic receiver module 102 are connected through the connection screw), and the connection screw is the above-mentioned connector 103; the distance between the acoustic transmitter module 101 and the acoustic receiver module 102 can be adjusted on the connection screw, so as to achieve the purpose of adjusting the distance between the acoustic wave transmitting source and the acoustic wave receiving source.

[0097] Specifically, Figures 5 to 7 As shown, when assembling the acoustic transmitting module 101 or the acoustic receiving module 102, it is necessary to ensure that the wire grooves 1053 on the two clamping member bodies 1051 and the corresponding connecting holes 1054 are respectively aligned in the axial direction, and then, the connecting screws are respectively passed through the connecting holes 1054 aligned on the two clamping member bodies 1051, thereby forming Figure 5 The acoustic transmitting module 101 or the acoustic receiving module 102 shown can centrally position the acoustic wave probe 104 in the wellbore 301 because the probe clamping hole 1052 for clamping the acoustic wave probe 104 is located at the center of the clamping body 1051 .

[0098] In an optional embodiment of the present invention, Figure 1 , Figure 2 As shown, the modular array acoustic logging physical simulation experiment system also includes a container 4 containing liquid and a wellbore rock model 3, a wellbore 301 is opened on the wellbore rock model 3 in the horizontal direction, and the wellbore rock model 3 is arranged in the container 4 and is located below the liquid level 5 of the liquid. Among them, the wellbore rock model 3 can be made into a rectangular block structure using corresponding materials according to different experimental formations or lithology and other factors, and a channel with a preset aperture is opened in the horizontal direction on the rectangular block structure, that is, a horizontal wellbore 301 is formed; according to different experimental environments, the wellbore rock model 3 can be suspended below the liquid level 5 in the container 4, so as to truly simulate the logging environment of the horizontal well. The container 4 can be, but is not limited to, a pool with an opening on the top, and the liquid contained in the container 4 can be water.

[0099] In the present invention, in order to avoid interference or weakening of the sound waves emitted and received by the sound wave probe 104, the clamping device 105 cannot be made of a material with good sound absorption properties, and can be made of a material with the same or similar acoustic impedance as the fluid in the wellbore 301. For example, if the wellbore rock model 3 is located in a water environment and the fluid in the wellbore 301 is water, the material for making the clamping device 105 can be a resin material with anti-tensile deformation performance.

[0100] In an optional embodiment of the present invention, Figure 2 , Figure 3As shown, the transmission device 202 includes a horizontal beam 2021, an adjusting arm 2022, a first supporting arm 2023, and a second supporting arm 2024. The adjusting arm 2022 is arranged above the horizontal beam 2021, and the bottom end of the adjusting arm 2022 is fixedly connected to the middle position of the top of the beam 2021. The first supporting arm 2023 and the second supporting arm 2024 are both located below the horizontal beam 2021, and the top end of the first supporting arm 2023 and the top end of the second supporting arm 2024 are respectively fixedly connected to the bottom of the horizontal beam 2021, and the first supporting arm 2023 and the second supporting arm 2024 are respectively located on the left and right sides of the adjusting arm 2022; the top end of the adjusting arm 2022 is rotatably provided with a first transmission wheel 2025, the top end of the first supporting arm 2023 is rotatably provided with a second transmission wheel 2026, and the bottom end of the first supporting arm 2023 is rotatably provided with a third transmission wheel The top end of the second support arm 2024 is rotatably provided with a fourth transmission wheel 2028, and the bottom end of the second support arm 2024 is rotatably provided with a fifth transmission wheel 2029. The acoustic module 1 is located between the third transmission wheel 2027 and the fifth transmission wheel 2029. The transmission belt 201 passes through the third transmission wheel 2027, the second transmission wheel 2026, the first transmission wheel 2025, the fourth transmission wheel 2028 and the fifth transmission wheel 2029 in sequence and is connected to the acoustic module 1. During the experiment, the transmission belt 201 can be driven to move by the rotation of each transmission wheel, thereby adjusting the positions of the acoustic transmitting module 101 and the acoustic receiving module 102 connected to the transmission belt 201. When the acoustic transmitting module 101 and the acoustic receiving module 102 are located in the wellbore 301, the purpose of adjusting the acoustic transmitting module 101 and the acoustic receiving module 102 to the preset position in the wellbore 301 can be achieved, and the acoustic wave measurement experiment of different well sections can be completed. The adjusting arm 2022 can be a telescopic structure with a length adjustment function such as a telescopic rod. After assembly, the tightness of the transmission belt 201 can be adjusted by adjusting the length of the adjusting arm 2022. The adjusting arm 2022 enables the traction positioning module 2 in the present application to be applicable to acoustic modules 1 of different lengths, and the length adjustment of the adjusting arm 2022 ensures that after the acoustic modules 1 of different lengths are assembled, the transmission belt 201 can be adjusted to a taut state, so that the acoustic transmitting module 101 and the acoustic receiving module 102 can be moved and accurately positioned in the wellbore 301.

[0101] In the present invention, the transmission belt 201 can be but not limited to a polyurethane open synchronous belt; the first transmission wheel 2025, the second transmission wheel 2026, the third transmission wheel 2027, the fourth transmission wheel 2028 and the fifth transmission wheel 2029 can all adopt transmission gears, and the teeth on the transmission gears are meshed with the teeth on the transmission belt 201, thereby achieving the purpose of driving the transmission belt 201 to move.

[0102] Further, such as Figure 2 , Figure 3 As shown, a manually operable rocker arm 204 is provided on the fourth transmission wheel 2028, and each transmission wheel can be driven by manually rotating the rocker arm 204, thereby driving the transmission belt 201 to move, so as to adjust the positions of the acoustic transmitting module 101 and the acoustic receiving module 102 in the wellbore 301. Of course, the rocker arm 204 can also be provided on the first transmission wheel 2025 or the second transmission wheel 2026, as long as it can provide driving force.

[0103] Further, such as Figure 2 , Figure 3 As shown, the transmission belt 201 has a scale, and the first support arm 2023 and / or the second support arm 2024 are provided with a scale pointer 203, which is used to point to the scale on the transmission belt 201 at the corresponding position. By determining the distance moved by the transmission belt 201, the distance moved by the acoustic system transmitting module 101 and the acoustic system receiving module 102 (i.e., the acoustic system module 1) in the wellbore 301 can be accurately known. Among them, the accuracy of the scale on the transmission belt 201 can be but not limited to 1mm or 0.5mm.

[0104] Further, such as Figure 2 , Figure 3 As shown, the transmission structure also includes two third support arms 2030 arranged in the vertical direction, the two third support arms 2030 are both located below the cross beam 2021, and the top ends of the two third support arms 2030 are respectively connected to the two ends of the cross beam 2021, and the bottom ends of the two third support arms 2030 are respectively provided with bases 2031, and the two bases 2031 are respectively fixed on the two side edges of the container 4, thereby supporting the entire transmission device 202, so that the lower part of the first support arm 2023, the third transmission wheel 2027, the lower part of the second support arm 2024 and the fifth transmission wheel 2029 can carry the acoustic system transmitting module 101 and the acoustic system receiving module 102 into the wellbore 301 below the liquid level 5. Among them, the third support arm 2030 can adopt a retractable structure with a length adjustment function such as a telescopic rod, so that the height of the beam 2021 can be adjusted, and the third support arm 2030 of different lengths can be adjusted according to the actual experimental scene, so that the bottom of the third transmission wheel 2027 and the fifth transmission wheel 2029 are on the same horizontal line with the central axis of the wellbore 301; in addition, the connection position between the third support arm 2030 and the beam 2021 is adjustable in the length direction of the beam 2021, so as to meet the assembly requirements of containers 4 of different sizes and be suitable for different experimental scenes.

[0105] In an optional embodiment of the present invention, Figure 1As shown, the acoustic wave probe 104 is electrically connected to the acoustic wave excitation and receiving module 6, and the acoustic wave excitation and receiving module 6 is electrically connected to the signal acquisition module 7 and the oscilloscope module 8 respectively, and the signal output end of the signal acquisition module 7 is electrically connected to the signal receiving end of the host computer 9, so that the received acoustic wave signal can be stored and analyzed. When the transmission belt 201 is adjusted to be in a tensioned state, and the transmission belt 201 drives the acoustic system transmitting module 101 and the acoustic system receiving module 102 to move to the preset position in the wellbore 301, the position data of the preset position can be recorded, and the acoustic wave probe 104 corresponding to the acoustic system transmitting module 101 is stimulated by the acoustic wave excitation and receiving module 6 to emit an acoustic wave signal, and the acoustic wave probe 104 corresponding to the acoustic system receiving module 102 receives the acoustic wave signal, and the received acoustic wave signal is collected by the signal acquisition module 7 and the waveform is displayed by the oscilloscope module 8, so as to realize the array acoustic wave logging physical simulation experiment measurement. Among them, the sound wave excitation and receiving module 6 can adopt but is not limited to a multi-channel ultrasonic pulse generator and receiver; the signal acquisition module 7 can adopt but is not limited to a high-precision multi-channel signal acquisition instrument; the oscilloscope module 8 can adopt but is not limited to an oscilloscope.

[0106] The characteristics and advantages of the modular array acoustic logging physical simulation experimental system of the present invention are:

[0107] 1. The modular array acoustic logging physical simulation experiment system adopts modular design, which greatly simplifies the assembly difficulty. The corresponding modules can be set according to different experimental requirements, and the application range is wider.

[0108] 2. The modular array acoustic logging physical simulation experiment system has a modular design that reduces the risk of failure of the entire system or other operational problems. When a failure occurs, it is only necessary to identify the failed module and replace it without affecting the function of the entire system.

[0109] 3. The modular array acoustic logging physical simulation experimental system can efficiently and quickly realize the physical simulation experimental measurement of array acoustic logging, simplify the structure of the experimental system, and improve the measurement efficiency.

[0110] 4. The modular array acoustic logging physical simulation experiment system can construct an acoustic module 1 at a relatively low cost. The distance between the acoustic transmitting module 101 and the acoustic receiving module 102 in the acoustic module 1 is adjustable, which can be adapted to different experimental scenarios and experimental requirements, and is convenient for adaptive adjustment of the acoustic module 1 to meet different experimental needs.

[0111] 5. The modular array acoustic logging physical simulation experiment system can maintain a well-centered position and perform measurements in the wellbore 301 of the wellbore rock model 3 of different sizes through the adaptive clamping of the clamping device 105 and the acoustic probe 104, which can reduce or eliminate the problem of inaccurate measurement results caused by the eccentricity of the installation position.

[0112] 6. The modular array acoustic logging physical simulation experiment system can be used to carry out array acoustic logging physical simulation experiments under various geological structures and well conditions. It can be used to study the physical simulation experiments of horizontal well acoustic logging responses, better demonstrate the characteristics of acoustic logging responses and verify the accuracy of numerical simulation experiments.

[0113] Implementation Method 2

[0114] like Figures 1 to 9 As shown, the present invention provides a measurement method for a modular array acoustic logging physical simulation experiment, which uses the above-mentioned modular array acoustic logging physical simulation experiment system to carry out an acoustic logging experiment of a horizontal well. The measurement method for the modular array acoustic logging physical simulation experiment includes the following steps:

[0115] Step S1: hoisting the wellbore rock model 3, so that the wellbore rock model 3 is placed in a container 4 containing liquid, and the wellbore 301 on the wellbore rock model 3 extends in the horizontal direction and is located below the liquid surface 5;

[0116] Step S2: installing the traction positioning module 2; wherein the traction positioning module 2 is fixedly installed above the container 4, and the length of the third support arm 2030 (i.e., the height of the crossbeam 2021) is adjusted so that the bottom of the third transmission wheel 2027 and the bottom of the fifth transmission wheel 2029 are in the same straight line in height with the central axis of the wellbore 301 on the wellbore rock model 3, that is, the transmission belt 201 between the third transmission wheel 2027 and the fifth transmission wheel 2029 is in the same straight line with the central axis of the wellbore 301.

[0117] Step S3: Connect the acoustic transmitting module 101 and the acoustic receiving module 102 through the connecting piece 103 to form the acoustic module 1, and respectively connect the acoustic transmitting module 101 and the acoustic receiving module 102 to the two ends of the transmission belt 201, wherein there is a first initial source distance between the acoustic transmitting module 101 and the acoustic receiving module 102; it should be noted that the first initial source distance can be set or adjusted according to actual experimental requirements, and the actual distance of the first initial source distance is not limited here.

[0118] Step S4: electrically connecting the acoustic wave probe 104 in the acoustic system transmitting module 101 and the acoustic wave probe 104 in the acoustic system receiving module 102 to the acoustic wave excitation and receiving module 6 respectively;

[0119] Further, in step S4, the acoustic wave signal is received by the signal acquisition module 7 and the waveform is displayed by the oscilloscope module 8. Among them, the acoustic wave excitation and receiving module 6 can adopt but is not limited to a multi-channel ultrasonic pulse generator and receiver; the signal acquisition module 7 can adopt but is not limited to a high-precision multi-channel signal acquisition instrument; the oscilloscope module 8 can adopt but is not limited to an oscilloscope.

[0120] Specifically, Figure 1 As shown, the acoustic wave probe 104 (i.e. Figure 1 T in the acoustic system receiving module 102 and the acoustic wave probe 104 (i.e. Figure 1 The R) in the multi-channel ultrasonic pulse generator and receiver are respectively connected to the T / R port and R port of the multi-channel ultrasonic pulse generator and receiver, and then the RF OUT port of the multi-channel ultrasonic pulse generator and receiver are respectively connected to the CH1 port of the high-precision multi-channel signal acquisition instrument and the CH1 port of the oscilloscope, and the SYNC OUT port of the multi-channel ultrasonic pulse generator and receiver are respectively connected to the CH2 port of the high-precision multi-channel signal acquisition instrument and the OR SYNC port of the oscilloscope, and finally the high-precision multi-channel signal acquisition instrument is connected to the host computer.

[0121] Step S5: adjusting the transmission belt 201 to be in a tensioned state, and driving the acoustic transmitting module 101 and the acoustic receiving module 102 to move to a preset position in the wellbore 301 through the transmission belt 201;

[0122] Step S6: recording the position data of the preset position, and stimulating the acoustic wave probe 104 in the acoustic system transmitting module 101 to transmit an acoustic wave signal through the acoustic wave excitation and receiving module 6, and receiving the acoustic wave signal through the acoustic wave probe 104 in the acoustic system receiving module 102 and recording it;

[0123] The sound wave signal is received by the signal acquisition module 7 and the waveform is displayed by the oscilloscope module 8 .

[0124] Step S7: moving the acoustic transmitting module 101 and the acoustic receiving module 102 to the next preset position within the wellbore 301 at a preset distance, and repeating the operation of step S6;

[0125] Step S8: Repeat the operation of step S7 until the transmission and reception of the acoustic wave signals at all preset positions in the wellbore 301 are completed to obtain the waveform of the entire well section.

[0126] In an optional embodiment of the present invention, after step S8, the method further includes:

[0127] Step S9: adjusting (increasing or decreasing) the distance value between the acoustic system transmitting module 101 and the acoustic system receiving module 102 to a second initial source distance;

[0128] Step S10: Repeat steps S5 to S8 to obtain full-well waveforms with different initial source distances.

[0129] Further, after step S10, the operations of step S9 to step S10 are repeated multiple times to obtain multiple full-well waveforms with different initial source distances. For example, eight different initial source distances are set, so that eight different full-well waveforms can be obtained. Fig.10 As shown, an array acoustic wave waveform diagram is obtained in which a transmitting source transmits an acoustic wave signal and eight receiving sources receive the acoustic wave signal, wherein P is a longitudinal wave and S is a transverse wave.

[0130] Furthermore, after obtaining multiple full-well waveforms at different initial source distances, the multiple full-well waveforms are filtered to improve the waveform signal-to-noise ratio; thereafter, multiple full-well waveforms at the same position in the wellbore 301 are respectively extracted to obtain a horizontal well array acoustic logging data set formed by a transmitted sound wave, multiple received sound waves, or a combination of multiple transmitted sound waves and multiple received sound waves.

[0131] The measurement method of the modular array acoustic logging physical simulation experiment of the present invention has the characteristics and advantages of the above-mentioned modular array acoustic logging physical simulation experiment system, which will not be described in detail here.

[0132] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A modular array acoustic logging physical simulation experimental system, characterized in that: The modular array acoustic logging physical simulation experimental system includes an acoustic system module and a traction positioning module. The acoustic system module includes an acoustic system transmitting module for emitting acoustic wave signals, an acoustic system receiving module for receiving acoustic wave signals, and a connecting piece, wherein the acoustic system transmitting module is connected to the acoustic system receiving module through the connecting piece, and the distance between the acoustic system transmitting module and the acoustic system receiving module can be adjusted on the connecting piece; The traction positioning module includes a transmission belt and a transmission device that can drive the transmission belt to move. The acoustic system transmitting module and the acoustic system receiving module are respectively connected to the two ends of the transmission belt. The transmission device drives the transmission belt to move, so as to pull the acoustic system transmitting module and the acoustic system receiving module to a preset position in the wellbore through the transmission belt.

2. The modular array acoustic logging physical simulation experimental system according to claim 1, characterized in that: The acoustic transmitting module and the acoustic receiving module each include an acoustic wave probe and at least two clamping devices, the two clamping devices are adapted to be clamped at two ends of the acoustic wave probe or positions close to two ends, and the clamping devices are used to clamp the acoustic wave probe and support the acoustic wave probe in the wellbore; The acoustic wave probe in the acoustic system transmitting module is used to transmit acoustic wave signals; The sound wave probe in the sound system receiving module is used to receive sound wave signals.

3. The modular array acoustic logging physical simulation experimental system according to claim 2, characterized in that: The acoustic wave probe in the acoustic system transmitting module and the acoustic wave probe in the acoustic system receiving module are both monopole probes or dipole probes; Alternatively, the acoustic wave probe in the acoustic transmitting module and the acoustic wave probe in the acoustic receiving module, one is a monopole probe and the other is a dipole probe.

4. The modular array acoustic logging physical simulation experimental system according to claim 2 or 3, characterized in that: The acoustic wave probe comprises a cylindrical probe vibration source part and two probe frames. The two probe frames are respectively arranged at two ends of the probe vibration source part, and the probe vibration source part is supported by the probe frames.

5. The modular array acoustic logging physical simulation experimental system according to claim 4, characterized in that: The clamping device comprises a clamping body, the outer contour of the clamping body is adapted to the inner wall of the wellbore, a plurality of probe clamping holes at different positions are arranged inside the clamping body, the probe clamping holes are adapted to the outer contour of the probe frame, so that the probe frame part of the acoustic wave probe can be clamped in the probe clamping holes, and the acoustic wave probe can be installed in any of the probe clamping holes to achieve centered or eccentric clamping of the acoustic wave probe; The clamping member body is provided with a notch which is in communication with the probe clamping hole, and the notch is located to form a wire groove for laying out the signal wire of the acoustic wave probe.

6. The modular array acoustic logging physical simulation experimental system according to claim 5, characterized in that: The two clamping devices are respectively clamped on the two probe frame parts on the same acoustic wave probe; The clamp body is provided with a plurality of connection holes spaced apart along its circumference, and the two clamping devices can be connected to the two opposite connection holes on the clamp body via a connection screw to fix the two clamping devices in connection.

7. The modular array acoustic logging physical simulation experimental system according to claim 6, characterized in that: The clamping device in the acoustic transmitting module is connected to the clamping device in the acoustic receiving module via the connecting screw, and the connecting screw is the connecting member; The distance between the acoustic transmitting module and the acoustic receiving module can be adjusted on the connecting screw.

8. The modular array acoustic logging physical simulation experimental system according to claim 1, characterized in that: The modular array acoustic logging physical simulation experiment system also includes a container containing liquid and a wellbore rock model, the wellbore is horizontally opened on the wellbore rock model, and the wellbore rock model is arranged in the container and below the liquid level of the liquid.

9. The modular array acoustic logging physical simulation experimental system according to claim 8, characterized in that: The transmission device comprises a crossbeam, an adjustment arm, a first support arm and a second support arm, wherein the adjustment arm is arranged above the crossbeam, and the bottom end of the adjustment arm is connected to the crossbeam, the first support arm and the second support arm are both located below the crossbeam, and the top end of the first support arm and the top end of the second support arm are respectively connected to the crossbeam; The top end of the adjusting arm is rotatably provided with a first transmission wheel, the top end and the bottom end of the first supporting arm are respectively rotatably provided with a second transmission wheel and a third transmission wheel, the top end and the bottom end of the second supporting arm are respectively rotatably provided with a fourth transmission wheel and a fifth transmission wheel, the sound system module is located between the third transmission wheel and the fifth transmission wheel, and the transmission belt passes through the third transmission wheel, the second transmission wheel, the first transmission wheel, the fourth transmission wheel and the fifth transmission wheel in sequence and is connected to the sound system module; The adjusting arm is a retractable structure to adjust the tightness of the transmission belt; The height of the crossbeam can be adjusted so that the bottoms of the third transmission wheel and the fifth transmission wheel are on the same horizontal line as the central axis of the wellbore.

10. The modular array acoustic logging physical simulation experimental system according to claim 9, characterized in that: The transmission belt is provided with a scale, and the first support arm and / or the second support arm are provided with a scale pointer, and the scale pointer is used to point to the scale on the transmission belt at a corresponding position.

11. The modular array acoustic logging physical simulation experimental system according to claim 2, characterized in that: The acoustic wave probe is electrically connected to the acoustic wave excitation and receiving module, and the acoustic wave excitation and receiving module is electrically connected to the signal acquisition module and the oscilloscope module respectively.

12. A measurement method for a modular array acoustic logging physical simulation experiment, which uses the modular array acoustic logging physical simulation experiment system according to any one of claims 1 to 11 to perform an acoustic logging experiment on a horizontal well, characterized in that: The measuring method comprises the following steps: Step S1: placing a wellbore rock model in a container containing liquid, wherein the wellbore on the wellbore rock model extends in a horizontal direction and is located below the liquid surface; Step S2: installing a traction positioning module; Step S3: connecting the acoustic system transmitting module and the acoustic system receiving module through a connecting piece to form an acoustic system module, and connecting the acoustic system transmitting module and the acoustic system receiving module to two ends of the transmission belt respectively, wherein there is a first initial source distance between the acoustic system transmitting module and the acoustic system receiving module; Step S4: electrically connecting the acoustic wave probe in the acoustic system transmitting module and the acoustic wave probe in the acoustic system receiving module to the acoustic wave excitation and receiving module respectively; Step S5: adjusting the transmission belt to be in a tensioned state, and driving the acoustic transmitting module and the acoustic receiving module to move to a preset position in the wellbore through the transmission belt; Step S6: recording the position data of the preset position, and stimulating the acoustic wave probe in the acoustic system transmitting module to transmit an acoustic wave signal through the acoustic wave excitation and receiving module, and receiving the acoustic wave signal through the acoustic wave probe in the acoustic system receiving module and recording it; Step S7: moving the acoustic system transmitting module and the acoustic system receiving module to the next preset position within the wellbore at a preset distance, and repeating the operation of step S6; Step S8: Repeat the operation of step S7 until the transmission and reception of the acoustic wave signals at all preset positions in the wellbore are completed to obtain the waveform of the entire well section.

13. The measurement method of modular array acoustic logging physical simulation experiment according to claim 12, characterized in that: After step S8, the method further includes: Step S9: adjusting the distance between the acoustic system transmitting module and the acoustic system receiving module to a second initial source distance; Step S10: Repeat steps S5 to S8 to obtain full-well waveforms with different initial source distances.

14. The measurement method of modular array acoustic logging physical simulation experiment according to claim 13, characterized in that: After step S10, the operations of step S9 to step S10 are repeated multiple times to obtain multiple full-well waveforms with different initial source distances.

15. The measurement method of modular array acoustic logging physical simulation experiment according to claim 14, characterized in that: After obtaining multiple full-well waveforms at different initial source distances, the multiple full-well waveforms are filtered; and the multiple full-well waveforms at the same position in the wellbore are respectively extracted to obtain a horizontal well array acoustic logging data set formed by a transmitted sound wave, multiple received sound waves, or a combination of multiple transmitted sound waves and multiple received sound waves.

16. The measurement method of modular array acoustic logging physical simulation experiment according to claim 12, characterized in that: In step S6, the acoustic wave signal is received by the signal acquisition module and the waveform is displayed and digitally acquired through the oscilloscope module.

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