Array acoustic logging physical simulation experiment system and measurement method

Abstract

The invention relates to an array acoustic logging physical simulation experiment system and a measuring method.The system comprises an acoustic measuring device and a traction positioning device, the acoustic measuring device comprises an acoustic transceiving unit, and the acoustic transceiving unit comprises an acoustic probe and at least two clamping devices; the clamping device is used for clamping the sound wave probe and supporting the sound wave probe in a well hole; the number of the sound wave receiving and transmitting units is multiple, and the multiple sound wave receiving and transmitting units are provided with at least two sound wave probes used for transmitting sound waves and receiving sound waves respectively. The traction positioning device comprises a synchronous belt, the multiple sound wave receiving and transmitting units are sequentially connected in series and connected to the two ends of the synchronous belt, and the multiple sound wave receiving and transmitting units are pulled to move to preset positions in a well hole through the synchronous belt. The method can be suitable for well hole rock models of any size, high-precision and rapid acoustic logging physical simulation experiment measurement is carried out under the good centering condition of the acoustic probe in a well hole, and the accuracy of acoustic logging of a 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 an 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 in my country, 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 his many years of experience and practice in related industries, proposes an array acoustic logging physical simulation experimental system and a measurement method to overcome the defects of the prior art. Summary of the invention

[0007] The purpose of the present invention is to provide an array acoustic logging physical simulation experiment system and measurement method, which is suitable for wellbore rock models of any size, can realize that the acoustic probe is in a good centering condition, and can perform high-precision and fast acoustic logging physical simulation experiment measurements, thereby improving the accuracy of horizontal well acoustic logging.

[0008] The purpose of the present invention can be achieved by adopting the following scheme:

[0009] The present invention provides an array acoustic wave logging physical simulation experiment system, which comprises an acoustic wave measuring device and a traction positioning device.

[0010] The acoustic wave measuring device comprises an acoustic wave transceiver unit, the acoustic wave transceiver unit comprises an acoustic wave probe and at least two clamping devices, the two clamping devices are adapted to be clamped at two ends or positions close to two ends of the acoustic wave probe, the clamping devices are used to clamp the acoustic wave probe and support the acoustic wave probe at a central position in the wellbore;

[0011] There are multiple sound wave transceiver units, and among the multiple sound wave transceiver units, at least two sound wave probes are respectively used to transmit sound waves and receive sound waves. The sound wave transceiver unit corresponding to the sound wave probe that transmits sound waves forms a transmitting unit, and the sound wave transceiver unit corresponding to the sound wave probe that receives sound waves forms a receiving unit.

[0012] The traction positioning device includes a synchronous belt and a transmission structure that can drive the synchronous belt to move. The multiple acoustic wave transceiver units are serially connected and connected to the two ends of the synchronous belt in sequence. The transmission structure drives the synchronous belt to move, so as to pull the multiple acoustic wave transceiver units to move to the preset position in the wellbore through the synchronous belt.

[0013] In a preferred embodiment of the invention, the acoustic wave probe includes a cylindrical probe vibration source part and two probe frames, the two probe frames are respectively arranged at both ends of the probe vibration source part, and the probe vibration source part is supported by the probe frames, and the probe vibration source part and the two probe frames cooperate to form the cylindrical acoustic wave probe.

[0014] In a preferred embodiment of the 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 probe clamping hole is provided in the middle position of the clamping body, and the probe clamping hole is adapted to the outer contour of the probe frame, so as to clamp the probe frame part of the acoustic wave probe in the probe clamping hole;

[0015] 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.

[0016] In a preferred embodiment of the invention, the two clamping devices are respectively clamped on the two probe skeleton parts on the same acoustic wave probe;

[0017] 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 connect the two clamping devices.

[0018] In a preferred embodiment of the invention, among the plurality of connecting screws, at least two connecting screws connect two of the clamping devices, and at least another two connecting screws connect all of the clamping devices;

[0019] Alternatively, among the plurality of connecting screws, the plurality of connecting screws are connected to all the clamping devices;

[0020] In the plurality of the acoustic wave transceiver units, the distances between different clamping devices are quantitatively adjustable to precisely control the distances between different acoustic wave transceiver units to form different acoustic wave measuring devices.

[0021] In a preferred embodiment of the invention, the traction positioning device also includes a container containing liquid and a horizontal well simulation component, the wellbore is opened on the horizontal well simulation component along the horizontal direction, and the horizontal well simulation component is arranged in the container and located below the liquid level of the liquid.

[0022] In a preferred embodiment of the invention, the transmission structure includes a crossbeam, an adjustment arm, a first support arm and a second support arm, 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;

[0023] 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 plurality of serially connected sound wave transceiver units are located between the third transmission wheel and the fifth transmission wheel, the synchronous belt sequentially passes through the third transmission wheel, the second transmission wheel, the first transmission wheel, the fourth transmission wheel and the fifth transmission wheel and is connected to the plurality of serially connected sound wave transceiver units;

[0024] The adjusting arm is a retractable structure to adjust the tightness of the synchronous belt.

[0025] In a preferred embodiment of the invention, at least one of the first transmission wheel, the second transmission wheel and the fourth transmission wheel is provided with a manually operable rocker arm.

[0026] In a preferred embodiment of the invention, the synchronous 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 synchronous belt at a corresponding position.

[0027] In a preferred embodiment of the invention, the transmission structure further comprises two third support arms, both of which are located below the cross beam, and the top ends of the two third support arms are respectively connected to the two ends of the cross beam, and the bottom ends of the two third support arms are respectively provided with bases, and the two bases are respectively fixed to the two side edges of the container;

[0028] The third support arm is a telescopic structure to adjust the height of the crossbeam so that the bottoms of the third transmission wheel and the fifth transmission wheel are on the same horizontal line with the central axis of the wellbore.

[0029] In a preferred embodiment of the invention, the acoustic wave probe is electrically connected to the acoustic wave excitation and receiving device, and the acoustic wave excitation and receiving device are electrically connected to a signal acquisition instrument and an oscilloscope respectively.

[0030] The present invention provides a measurement method for an array acoustic logging physical simulation experiment, which uses the above-mentioned 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:

[0031] Step S1: placing a horizontal well simulation member in a container containing liquid, wherein the wellbore on the horizontal well simulation member extends in a horizontal direction and is located below the liquid surface;

[0032] Step S2: installing a traction positioning device;

[0033] Step S3: connecting a plurality of acoustic wave transceiver units in series to the synchronous belt of the traction positioning device;

[0034] Step S4: electrically connecting the acoustic wave probes in the plurality of acoustic wave transceiver units to the acoustic wave excitation and receiving devices respectively;

[0035] Step S5: adjusting the synchronous belt to be in a tensioned state, and driving the plurality of acoustic wave transceiver units to move to a preset position in the wellbore through the synchronous belt;

[0036] In step S5, the position data of the preset position is recorded, and the acoustic wave probe corresponding to the transmitting unit in the acoustic wave transceiver unit is stimulated to transmit an acoustic wave signal by the acoustic wave excitation and receiving device, and the acoustic wave probe corresponding to the receiving unit in the acoustic wave transceiver unit receives the acoustic wave signal and records it.

[0037] In a preferred embodiment of the present invention, in step S5, the acoustic wave signal is received by a signal acquisition instrument and the waveform is displayed by an oscilloscope.

[0038] In a preferred embodiment of the invention, after step S5, the following steps are further included:

[0039] Step S6: driving the plurality of acoustic wave transceiver units to move to the next preset position in the wellbore through the synchronous belt, and repeating the operation of step S5 until the measurement of the preset target well section to be measured is completed;

[0040] Step S7: Determine whether the collected acoustic wave signal data is qualified. If there is unqualified acoustic wave signal data, re-measure the well section corresponding to the unqualified acoustic wave signal data.

[0041] As described above, the characteristics and advantages of the array acoustic logging physical simulation experimental system and measurement method of the present invention are:

[0042] The acoustic wave measuring device includes a plurality of acoustic wave transceiver units connected in series, and at least two acoustic wave probes are provided in the plurality of acoustic wave transceiver units for transmitting and receiving acoustic waves respectively. During the experiment, the synchronous belt of the traction positioning device can be connected to the plurality of acoustic wave transceiver units connected in series, and the synchronous belt is driven to move by the transmission structure of the traction positioning device, so as to achieve the purpose of the synchronous belt pulling the plurality of acoustic wave transceiver units to move to a preset position in the wellbore. After reaching the preset position, at least one acoustic wave probe transmits acoustic waves, and another at least one acoustic wave probe receives acoustic waves, and the transmitted and received acoustic waves are recorded and compared and analyzed, thereby achieving the purpose of the physical simulation experiment measurement of acoustic well logging;

[0043] In addition, since the two ends or near the two ends of the acoustic wave probe of the present application are respectively clamped with clamping devices, the clamping device can support the acoustic wave probe in a centered position in the wellbore after the acoustic wave probe enters the wellbore, which not only ensures the stability of the acoustic wave probe in the wellbore, but also enables the acoustic wave probe to be in a good centered condition for high-precision and fast acoustic logging experiments. Corresponding clamping devices can be matched for wellbores of different sizes. Therefore, the present application can be used for acoustic logging physical simulation experimental measurements of wellbore rock models of any size, meeting different experimental needs and having wider applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] 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.

[0045] in:

[0046] Figure 1 : A schematic diagram of the structure of the invented array acoustic logging physical simulation experimental system.

[0047] Figure 2 : This is a structural schematic diagram of the acoustic wave measuring device and the traction positioning device in the assembled state in the invented array acoustic wave logging physical simulation experimental system.

[0048] Figure 3 :A three-dimensional diagram of the acoustic probe in the invented array acoustic logging physical simulation experimental system.

[0049] Figure 4 : A three-dimensional diagram of the clamping device in the invented array acoustic logging physical simulation experimental system.

[0050] Figure 5 : This is a schematic diagram of the structure of the acoustic wave transceiver unit in the invented array acoustic wave logging physical simulation experimental system.

[0051] Figure 6 : A schematic diagram of the structure of the acoustic wave measuring device in the invented array acoustic wave logging physical simulation experimental system.

[0052] Figure 7 : This is the electrical connection structure diagram of the invented array acoustic logging physical simulation experimental system.

[0053] Figure 8 :A flowchart of the measurement method for the invented array acoustic logging physical simulation experiment.

[0054] The accompanying drawings in the present invention are:

[0055] 1. Acoustic wave measuring device; 101. Acoustic wave probe;

[0056] 1011. Probe vibration source part; 1012. Probe frame;

[0057] 102. Clamping device; 1021. Probe clamping hole;

[0058] 1022, wire trough; 1023, connection hole;

[0059] 1024, clamping part body; 103, connecting screw;

[0060] 11. Sound wave transceiver unit; 111. Transmitter unit;

[0061] 112. Receiving unit; 2. Traction positioning device;

[0062] 201. crossbeam; 202. first supporting arm;

[0063] 203. Second supporting arm; 204. Adjusting arm;

[0064] 205. synchronous belt; 206. first transmission wheel;

[0065] 207, second transmission wheel; 208, fourth transmission wheel;

[0066] 209, third transmission wheel; 210, fifth transmission wheel;

[0067] 211. Scale pointer; 212. Rocker arm;

[0068] 213. third supporting arm; 214. base;

[0069] 3. Container; 4. Horizontal well simulation component;

[0070] 401, wellbore; 5, liquid level;

[0071] 6. Sound wave excitation and receiving device; 7. Signal acquisition instrument;

[0072] 8. Oscilloscope. DETAILED DESCRIPTION

[0073] 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.

[0074] The present invention provides an array acoustic logging physical simulation experiment 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 experiment measurement under the condition of good centering of the acoustic probe.

[0075] In order to have a clearer understanding of the technical features, purposes and effects of the invention, specific embodiments of the invention are now described with reference to the accompanying drawings.

[0076] Implementation Method 1

[0077] like Figures 1 to 7 As shown, the present invention provides an array acoustic wave logging physical simulation experiment system, which includes an acoustic wave measuring device 1 and a traction positioning device 2, wherein the acoustic wave measuring device 1 includes an acoustic wave transceiver unit 11, the acoustic wave transceiver unit 11 includes an acoustic wave probe 101 and at least two clamping devices 102, the two clamping devices 102 are adapted to be clamped at both ends or positions close to both ends of the acoustic wave probe 101 (wherein, the clamping devices 102 are adapted to be able to stably clamp the acoustic wave probe 101), the clamping devices 102 are used to clamp the acoustic wave probe 101 and support the acoustic wave probe 101 to be located in a radially centered position in a wellbore 401 (that is, located at or close to the axis of the wellbore 401); the number of the acoustic wave transceiver units 11 is multiple, and among the multiple acoustic wave transceiver units 11, at least one acoustic wave probe 101 is used to transmit acoustic waves, And at least one sound wave probe 101 is provided for receiving sound waves, and the sound wave transceiver unit 11 corresponding to the sound wave probe 101 for transmitting sound waves forms a transmitting unit 111, and the sound wave transceiver unit 11 corresponding to the sound wave probe 101 for receiving sound waves forms a receiving unit 112; and the traction positioning device 2 includes a synchronous belt 205 and a transmission structure that can drive the synchronous belt 205 to move, and multiple sound wave transceiver units 11 are serially connected and connected to the two ends of the synchronous belt 205 in sequence, and the transmission structure can drive the synchronous belt 205 to move, so as to pull the multiple sound wave transceiver units 11 to the preset positions in the wellbore 401 through the synchronous belt 205. When the synchronous belt 205 is in a tensioned state and the synchronous belt 205 stops moving, the preset positions of the multiple sound wave transceiver units 11 in the wellbore 401 do not move, so that the multiple sound wave transceiver units 11 can be positioned in the wellbore 401.

[0078] In the present invention, the acoustic wave measuring device 1 includes a plurality of acoustic wave transceiver units 11 connected in series, and among the plurality of acoustic wave transceiver units 11, at least one acoustic wave probe 101 is provided for transmitting acoustic waves, and another acoustic wave probe 101 is provided for receiving acoustic waves. During the experiment, the synchronous belt 205 of the traction positioning device 2 can be connected to the plurality of acoustic wave transceiver units 11 connected in series, and the synchronous belt 205 is driven to move by the transmission structure of the traction positioning device 2, so as to achieve the purpose of the synchronous belt 205 pulling the plurality of acoustic wave transceiver units 11 to move to a preset position in the wellbore 401. After reaching the preset position, at least one acoustic wave probe 101 transmits acoustic waves, and another at least one acoustic wave probe 101 receives acoustic waves. In this process, the transmitted and received acoustic wave signals can be recorded and compared and analyzed, thereby achieving the purpose of the physical simulation experiment measurement of acoustic well logging. Since the two ends or positions near the two ends of the acoustic wave probe 101 of the present application are respectively clamped with clamping devices 102, the clamping device 102 can support the acoustic wave probe 101 in a centered position in the wellbore 401 after the acoustic wave probe 101 enters the wellbore 401, which not only ensures the stability of the acoustic wave probe 101 in the wellbore 401, but also enables the acoustic wave probe 101 to be in a good centered condition for high-precision and rapid acoustic logging experiments. Different sizes of clamping devices 102 can be matched for wellbores 401 of different sizes. Therefore, the present application can be used for acoustic logging physical simulation experimental measurements of wellbore rock models of any size, meet different experimental needs, and have wider applicability.

[0079] In an optional embodiment of the present invention, Figure 3 As shown, the acoustic wave probe 101 includes a cylindrical probe vibration source part 1011 and two probe skeletons 1012. The two probe skeletons 1012 are respectively fixedly mounted on the two ends of the probe vibration source part 1011. The probe vibration source part 1011 is supported by the probe skeletons 1012 to increase the strength of the acoustic wave probe 101. The probe vibration source part 1011 can be used to transmit or receive sound waves. The probe vibration source part 1011 and the two probe skeletons 1012 cooperate to form a cylindrical acoustic wave probe 101. Among them, the probe vibration source part 1011 can be a piezoelectric crystal, which can convert electrical energy into sound wave energy, and can also convert received sound waves into electrical energy.

[0080] The diameter of the acoustic wave probe 101 is smaller than the inner diameter of the wellbore 401. In a specific embodiment, the diameter of the acoustic wave probe 101 may be, but not limited to, 14 mm, and the inner diameter of the wellbore 401 may be, but not limited to, 40 mm.

[0081] Furthermore, the outer wall of the acoustic wave probe 101 may be covered with a waterproof film, so that the acoustic wave probe 101 has waterproof capability, and the acoustic wave probe 101 can be placed in a liquid environment to work, so as to achieve the purpose of a real model well environment.

[0082] In the present invention, the acoustic wave probe 101 can adopt an existing monopole probe or dipole probe that can transmit and receive array acoustic waves. Of course, other elements that can transmit and receive acoustic waves can also be used and arranged in the above-mentioned probe vibration source part 1011 to form the acoustic wave probe 101 structure in the above-mentioned embodiment. The specific type and structure of the elements that can transmit and receive acoustic waves are not limited here.

[0083] In an optional embodiment of the present invention, Figure 4 , Figure 5 As shown, the clamping device 102 includes a disc-shaped clamping body 1024, the outer contour of which is adapted to the inner wall of the wellbore 401, so as to ensure that the clamping device 102 clamps the acoustic wave probe 101 into the wellbore 401, and the outer wall of the clamping body 1024 can fit the inner wall of the wellbore 401, thereby ensuring the stability of the placement of the acoustic wave probe 101 in the wellbore 401. Figure 4 As shown, a probe clamping hole 1021 is provided in the middle position of the clamping body 1024, and the probe clamping hole 1021 is adapted to the outer contour of the probe skeleton 1012 (that is, the aperture of the probe clamping hole 1021 is equal to the outer diameter of the probe skeleton 1012), so that the probe skeleton 1012 part of the acoustic wave probe 101 can be stably clamped in the probe clamping hole 1021; a notch is provided on one side of the probe clamping hole 1021 on the clamping body 1024, which is connected to the probe clamping hole 1021, and a wire groove 1022 for arranging the signal line of the acoustic wave probe 101 is formed at the position of the notch, thereby facilitating the routing of the signal line of the acoustic wave probe 101.

[0084] Further, such as Figure 5 As shown, the two clamping devices 102 are respectively clamped on two probe skeletons 1012 parts on the same acoustic wave probe 101 to ensure stable clamping of the acoustic wave probe 101 and positioning in the wellbore 401 .

[0085] Further, such as Figure 4 , Figure 5 As shown, a plurality of connection holes 1023 are arranged on the clamp body 1024 at intervals along its circumference, and two clamping devices 102 can be connected to the two corresponding connection holes 1023 on the clamp body 1024 through the connection screws 103 to connect the two clamping devices 102. Among the plurality of connection screws 103, at least two connection screws 103 connect the two clamping devices 102, and at least another two connection screws 103 connect all the clamping devices 102; or, among the plurality of connection screws 103, the plurality of connection screws 103 connect all the clamping devices 102.

[0086] Specifically, Figure 4 , Figure 5As shown, a connection hole 1023 is provided on the clamp body 1024 at intervals of 90° along its circumference. Therefore, four connection holes 1023 are spaced and evenly arranged on the clamp body 1024 in this embodiment (the diameter of the connection hole 1023 can be but is not limited to 2 mm). When assembling the sound wave transceiver unit 11, it is necessary to ensure that the wire grooves 1022 and the four connection holes 1023 on the two clamp bodies 1024 are respectively opposite in the axial direction. Then, four connection screws 103 are respectively passed through the opposite connection holes 1023 on the two clamp bodies 1024, thereby forming Figure 4 The acoustic wave transceiver unit 11 shown can achieve the effect of centering the acoustic wave probe 101 in the wellbore 401 because the probe clamping hole 1021 for clamping the acoustic wave probe 101 is located at the center of the clamping body 1024 . It should be noted that a longer connecting screw 103 is required to be used for connection in a group of two connecting holes 1023 located at a central symmetrical position on the clamping member body 1024. The length of the connecting screw 103 depends on the length of the entire sound wave transceiver unit 11 (it can be appropriately extended according to actual needs). Therefore, all clamping devices 102 can be connected through the longer connecting screw 103, so that all clamping devices 102 in the sound wave transceiver unit 11 can be connected together, and a shorter connecting screw 103 can be used in another group of two connecting holes 1023 located at a central symmetrical position to connect the two clamping member bodies 1024 in a clamping device 102 together to ensure the stable connection of the two clamping member bodies 1024 in a single clamping device 102; of course, longer connecting screws 103 can also be used in all connecting holes 1023 for connection.

[0087] By setting the connecting screw 103, the distance between different clamping devices 102 in multiple sound wave transceiver units 11 can be quantitatively adjusted, so that the distance between different sound wave transceiver units 11 can be accurately controlled to form different sound wave measuring devices 1, thereby meeting different experimental requirements.

[0088] In an optional embodiment of the present invention, Figure 1 , Figure 7 As shown, the traction positioning device 2 also includes a container 3 containing liquid and a horizontal well simulation part 4, a wellbore 401 is opened on the horizontal well simulation part 4 in the horizontal direction, and the horizontal well simulation part 4 is arranged in the container 3 and is located below the liquid surface 5 of the liquid. Among them, the horizontal well simulation part 4 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 401 is formed; according to different experimental environments, the horizontal well simulation part 4 can be suspended below the liquid surface 5 in the container 3, so as to truly simulate the logging environment of the horizontal well. The container 3 can be, but is not limited to, a pool with an opening on the top, and the liquid contained in the container 3 can be water.

[0089] In the present invention, in order to avoid interference or weakening of the sound waves emitted and received by the acoustic wave probe 101, the clamping device 102 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 401. For example, if the horizontal well simulation member 4 is located in a water environment and the fluid in the wellbore 401 is water, the material for making the clamping device 102 can be a resin material with anti-tensile deformation performance.

[0090] In an optional embodiment of the present invention, Figure 1 , Figure 2As shown, the transmission structure includes a horizontal beam 201, an adjusting arm 204, a first supporting arm 202 and a second supporting arm 203. The adjusting arm 204 is arranged above the horizontal beam 201, and the bottom end of the adjusting arm 204 is fixedly connected to the middle position of the top of the beam 201. The first supporting arm 202 and the second supporting arm 203 are both located below the horizontal beam 201, and the top end of the first supporting arm 202 and the top end of the second supporting arm 203 are respectively fixedly connected to the bottom of the horizontal beam 201, and the first supporting arm 202 and the second supporting arm 203 are respectively located on the left and right sides of the adjusting arm 204; the top end of the adjusting arm 204 is rotatably provided with a first transmission wheel 206, the top end of the first supporting arm 202 is rotatably provided with a second transmission wheel 207, the bottom end of the first supporting arm 202 is rotatably provided with a third transmission wheel 209, and the top end of the second supporting arm 203 is rotatably provided with a third transmission wheel 209. A fourth transmission wheel 208 is rotatably provided at the bottom end of the second support arm 203, and a fifth transmission wheel 210 is rotatably provided at the bottom end of the second support arm 203. The multiple acoustic wave transceiver units 11 (i.e., the acoustic wave measuring device 1) connected in series are located between the third transmission wheel 209 and the fifth transmission wheel 210. The synchronous belt 205 passes through the third transmission wheel 209, the second transmission wheel 207, the first transmission wheel 206, the fourth transmission wheel 208 and the fifth transmission wheel 210 in sequence and is connected to the multiple acoustic wave transceiver units 11 connected in series. During the experiment, the synchronous belt 205 can be driven to move by the rotation of each transmission wheel, thereby adjusting the positions of the multiple acoustic wave transceiver units 11 (i.e., the acoustic wave measuring device 1) connected in series with the synchronous belt 205. When the multiple acoustic wave transceiver units 11 (i.e., the acoustic wave measuring device 1) connected in series are located in the wellbore 401, the purpose of adjusting the multiple acoustic wave transceiver units 11 connected in series to the preset position in the wellbore 401 can be achieved, and the acoustic wave measurement experiment of different well sections can be completed. The adjusting arm 204 may be a telescopic structure with a length adjustment function such as a telescopic rod. After assembly, the tension of the synchronous belt 205 can be adjusted by adjusting the length of the adjusting arm 204. The adjusting arm 204 enables the traction positioning device 2 in the present application to be applicable to acoustic wave measuring devices 1 of different lengths, and the length adjustment of the adjusting arm 204 ensures that after the acoustic wave measuring devices 1 of different lengths are assembled, the synchronous belt 205 can be adjusted to a tensioned state, so that the serially connected multiple acoustic wave transceiver units 11 can be moved and accurately positioned in the wellbore 401.

[0091] In the present invention, the synchronous belt 205 can be but not limited to a polyurethane open synchronous belt; the first transmission wheel 206, the second transmission wheel 207, the third transmission wheel 209, the fourth transmission wheel 208 and the fifth transmission wheel 210 can all be transmission gears, and the teeth on the transmission gears are meshed with the teeth on the synchronous belt 205, thereby achieving the purpose of driving the synchronous belt 205 to move.

[0092] Further, such as Figure 1 , Figure 2 As shown, a manually operable rocker arm 212 is provided on the fourth transmission wheel 208, and each transmission wheel can be driven by manually rotating the rocker arm 212, thereby driving the synchronous belt 205 to move, so as to adjust the positions of the multiple serially connected acoustic wave transceiver units 11 in the wellbore 401. Of course, the rocker arm 212 can also be provided on the first transmission wheel 206 or the second transmission wheel 207, as long as it can provide driving force.

[0093] Further, such as Figure 1 , Figure 2 As shown, the synchronous belt 205 has a scale, and the first support arm 202 and / or the second support arm 203 are provided with a scale pointer 211, which is used to point to the scale on the synchronous belt 205 at the corresponding position. By determining the distance moved by the synchronous belt 205, the distance moved by the multiple serially connected acoustic wave transceiver units 11 (i.e., the acoustic wave measuring device 1) in the wellbore 401 can be accurately known. Among them, the accuracy of the scale on the synchronous belt 205 can be but not limited to 1mm or 0.5mm.

[0094] Further, such as Figure 1 , Figure 2 As shown, the transmission structure also includes two third support arms 213 arranged in the vertical direction, the two third support arms 213 are both located below the cross beam 201, and the top ends of the two third support arms 213 are respectively connected to the two ends of the cross beam 201, and the bottom ends of the two third support arms 213 are respectively provided with bases 214, and the two bases 214 are respectively fixed on the two side edges of the container 3, thereby supporting the entire transmission structure, so that the lower part of the first support arm 202, the third transmission wheel 209, the lower part of the second support arm 203 and the fifth transmission wheel 210 can carry the multiple serially connected acoustic wave transceiver units 11 into the wellbore 401 below the liquid level 5. Among them, the third support arm 213 can adopt a retractable structure with a length adjustment function such as a telescopic rod to achieve the purpose of adjusting the height of the beam 201. The third support arm 213 of different lengths can be adjusted according to the actual experimental scene, so that the bottom of the third transmission wheel 209 and the fifth transmission wheel 210 are on the same horizontal line with the central axis of the wellbore 401; in addition, the connection position of the third support arm 213 and the beam 201 is adjustable in the length direction of the beam 201, thereby meeting the assembly requirements of containers 3 of different sizes and being suitable for different experimental scenes.

[0095] In an optional embodiment of the present invention, Figure 7As shown, the acoustic wave probe 101 is electrically connected to the acoustic wave excitation and receiving device 6, and the acoustic wave excitation and receiving device 6 is electrically connected to the signal acquisition instrument 7 and the oscilloscope 8 respectively. When the synchronous belt 205 is adjusted to be in a tensioned state, and the synchronous belt 205 drives the multiple acoustic wave transceiver units 11 to move to the preset position in the wellbore 401, the position data of the preset position can be recorded, and the acoustic wave probe 101 corresponding to the transmitting unit 111 in the acoustic wave transceiver unit 11 is stimulated by the acoustic wave excitation and receiving device 6 to transmit the acoustic wave signal, and the acoustic wave probe 101 corresponding to the receiving unit 112 in the acoustic wave transceiver unit 11 receives the acoustic wave signal, and the received acoustic wave signal is collected by the signal acquisition instrument 7 and the waveform is displayed by the oscilloscope 8, so as to realize the array acoustic wave logging physical simulation experiment measurement. Among them, the acoustic wave excitation and receiving device 6 can adopt but not limited to a multi-channel ultrasonic pulse generator and receiver; the signal acquisition instrument 7 can adopt but not limited to a high-precision multi-channel signal acquisition instrument.

[0096] In a specific embodiment of the present application, Figure 6 As shown, the acoustic wave measuring device 1 is a single-transmitter, four-receiver structure (i.e., one transmitting unit 111 on the left and four receiving units 112 in series array on the right). It should be noted that, according to actual experimental needs, different numbers of transmitting units 111 and different numbers of receiving units 112 can be set, and the positions of the transmitting units 111 and the receiving units 112 relative to each other can also be adaptively changed and adjusted.

[0097] The characteristics and advantages of the array acoustic logging physical simulation experimental system of the present invention are:

[0098] 1. The array acoustic logging physical simulation experiment system can efficiently and quickly realize the physical simulation experiment measurement of array acoustic logging, simplify the structure of the experimental system, and improve the measurement efficiency.

[0099] 2. The array acoustic logging physical simulation experiment system can construct an acoustic wave measuring device 1 at a relatively low cost. The distance between the transmitting unit 111 for transmitting acoustic waves and the receiving unit 112 for receiving acoustic waves in the acoustic wave measuring device is adjustable, and the number of the transmitting unit 111 and the receiving unit 112 is adjustable. It can be adapted to different experimental scenarios and experimental requirements, and is convenient for adaptive adjustment of the structure of the acoustic wave measuring device 1 to meet different experimental needs.

[0100] 3. The array acoustic logging physical simulation experiment system, through the adaptive clamping of the clamping device 102 and the acoustic probe 101, can well maintain the center position and perform measurements in the wellbore 401 of the horizontal well simulation parts 4 of different sizes, which can reduce or eliminate the problem of inaccurate measurement results caused by eccentricity of the installation position.

[0101] 4. The 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.

[0102] Implementation Method 2

[0103] like Figures 1 to 8 As shown, the present invention provides a measurement method for array acoustic logging physical simulation experiment, which uses the above-mentioned array acoustic logging physical simulation experiment system to carry out acoustic logging experiment of horizontal wells. The measurement method includes the following steps:

[0104] Step S1: hoisting the horizontal well simulation member 4 so that the horizontal well simulation member 4 is placed in a container 3 containing liquid, and the wellbore 401 on the horizontal well simulation member 4 extends in the horizontal direction and is located below the liquid surface 5;

[0105] Step S2: installing the traction positioning device 2; wherein the traction positioning device 2 is fixedly installed above the container 3, and the length of the third support arm 213 (i.e., the height of the crossbeam 201) is adjusted so that the bottom of the third transmission wheel 209 and the bottom of the fifth transmission wheel 210 are located in the same straight line in height with the central axis of the wellbore 401 on the horizontal well simulation component 4, that is, the synchronous belt 205 located between the third transmission wheel 209 and the fifth transmission wheel 210 is located in the same straight line with the central axis of the wellbore 401.

[0106] Step S3: Connecting a plurality of acoustic wave transceiver units 11 in series to the synchronous belt 205 of the traction positioning device 2;

[0107] Step S4: electrically connecting the acoustic wave probes 101 in the plurality of acoustic wave transceiver units 11 to the acoustic wave excitation and receiving devices 6 respectively;

[0108] Step S5: Pulling multiple acoustic wave transceiver units 11 into the wellbore 401 through the synchronous belt 205 of the traction positioning device 2, adjusting the length of the adjustment arm 204, adjusting the synchronous belt 205 to be in a tensioned state, and driving the multiple acoustic wave transceiver units 11 to move to a preset position in the wellbore 401 through the synchronous belt 205;

[0109] In the above step S5, the position data of the preset position is recorded, and the acoustic wave signal is transmitted through the acoustic wave excitation and receiving device 6 and the acoustic wave probe 101 corresponding to the transmitting unit 111 in the excitation acoustic wave transceiver unit 11, and the acoustic wave probe 101 corresponding to the receiving unit 112 in the acoustic wave transceiver unit 11 receives the acoustic wave signal and records it.

[0110] Further, in step S5, the acoustic wave signal is received by the signal acquisition device 7 and the waveform is displayed by the oscilloscope 8. Among them, the acoustic wave excitation and receiving device 6 can be used but not limited to a multi-channel ultrasonic pulse generator and receiver; the signal acquisition device 7 can be used but not limited to a high-precision multi-channel signal acquisition device.

[0111] Specifically, Figure 7 As shown, for the sound wave measuring device 1, which is a single-transmitting, four-receiving structure, the T / R port of the multi-channel ultrasonic pulse generator receiver is the sound source excitation signal output port, the R1-R4 port is the input port for receiving the sound wave signal, the T / R port of the multi-channel ultrasonic pulse generator receiver is electrically connected to the sound wave probe 101 corresponding to the transmitting unit 111 in the sound wave transceiver unit 11, and the R1-R4 ports of the multi-channel ultrasonic pulse generator receiver are respectively electrically connected to the sound wave probes 101 corresponding to the four receiving units 112 in the sound wave transceiver unit 11; the SYNC OUT1-SYNC OUT4 ports of the multi-channel ultrasonic pulse generator receiver are analog receiving signal output ports, the RF OUT port is a trigger signal output port, the CH1-CH5 ports of the high-precision multi-channel signal acquisition instrument are analog signal digitization input ports, the SYNC OUT1-SYNC OUT4 ports of the multi-channel ultrasonic pulse generator receiver are respectively electrically connected to the CH2-CH5 ports of the high-precision multi-channel signal acquisition instrument, and the RF OUT port of the multi-channel ultrasonic pulse generator receiver is respectively electrically connected to the CH2-CH5 ports of the high-precision multi-channel signal acquisition instrument. The OUT port is electrically connected to the CH1 port of the high-precision multi-channel signal acquisition instrument; the CH1 port of the oscilloscope 8 is an analog signal digital input port, and the OR SYNC port is an analog receiving signal output port. The CH1 port of the oscilloscope 8 is electrically connected to the RF OUT port of the multi-channel ultrasonic pulse generator and receiver and the CH1 port of the high-precision multi-channel signal acquisition instrument respectively, and the OR SYNC port of the oscilloscope 8 is electrically connected to the SYNCOUT1 port of the multi-channel ultrasonic pulse generator and receiver and the CH2 port of the high-precision multi-channel signal acquisition instrument respectively. The oscilloscope 8 is used to view and display the waveform of the sound wave signal.

[0112] In an optional embodiment of the present invention, Figure 8 As shown, after step S5, the following steps are also included:

[0113] Step S6: driving the multiple acoustic wave transceiver units 11 to move to the next preset position in the wellbore 401 through the synchronous belt 205, and repeating the operation of the above step S5 until the measurement of the preset target well section to be measured is completed;

[0114] Step S7: Determine whether the collected acoustic signal data is qualified. If there is unqualified acoustic signal data (that is, the collected acoustic signal data obviously exceeds the preset range), re-measure the well section corresponding to the unqualified acoustic signal data until all acoustic signal data are qualified.

[0115] The measurement method of the array acoustic logging physical simulation experiment of the present invention has the same characteristics and advantages as the above-mentioned array acoustic logging physical simulation experiment system, which will not be described in detail here.

[0116] 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. An array acoustic logging physical simulation experimental system, characterized in that: The array acoustic logging physical simulation experimental system includes an acoustic wave measuring device and a traction positioning device. The acoustic wave measuring device comprises an acoustic wave transceiver unit, the acoustic wave transceiver unit comprises an acoustic wave probe and at least two clamping devices, the two clamping devices are adapted to be clamped at two ends or positions close to two ends of the acoustic wave probe, the clamping devices are used to clamp the acoustic wave probe and support the acoustic wave probe at a central position in the wellbore; There are multiple sound wave transceiver units, and among the multiple sound wave transceiver units, at least two sound wave probes are respectively used to transmit sound waves and receive sound waves. The sound wave transceiver unit corresponding to the sound wave probe that transmits sound waves forms a transmitting unit, and the sound wave transceiver unit corresponding to the sound wave probe that receives sound waves forms a receiving unit. The traction positioning device includes a synchronous belt and a transmission structure that can drive the synchronous belt to move. The multiple acoustic wave transceiver units are serially connected and connected to the two ends of the synchronous belt in sequence. The transmission structure drives the synchronous belt to move, so as to pull the multiple acoustic wave transceiver units to move to the preset position in the wellbore through the synchronous belt.

2. The array acoustic logging physical simulation experimental system according to claim 1, characterized in that: The acoustic wave probe comprises a cylindrical probe vibration source part and two probe frames, wherein 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, and the probe vibration source part and the two probe frames cooperate to form the cylindrical acoustic wave probe.

3. The array acoustic logging physical simulation experimental system according to claim 2, characterized in that: The clamping device comprises a clamping body, the outer contour of which is matched with the inner wall of the wellbore, a probe clamping hole is provided in the middle of the clamping body, and the probe clamping hole is matched with the outer contour of the probe frame, so as to clamp the probe frame part of the acoustic wave probe in the probe clamping hole; 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.

4. The array acoustic logging physical simulation experimental system according to claim 3, 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 connect the two clamping devices.

5. The array acoustic logging physical simulation experimental system according to claim 4, characterized in that: Among the plurality of connecting screws, at least two connecting screws connect two of the clamping devices, and at least another two connecting screws connect all of the clamping devices; Alternatively, among the plurality of connecting screws, the plurality of connecting screws are connected to all the clamping devices; In the plurality of the acoustic wave transceiver units, the distances between different clamping devices are quantitatively adjustable to precisely control the distances between different acoustic wave transceiver units to form different acoustic wave measuring devices.

6. The array acoustic logging physical simulation experimental system according to claim 1, characterized in that: The traction positioning device also includes a container containing liquid and a horizontal well simulation component. The wellbore is opened on the horizontal well simulation component along the horizontal direction. The horizontal well simulation component is arranged in the container and is located below the liquid level of the liquid.

7. The array acoustic logging physical simulation experimental system according to claim 6, characterized in that: The transmission structure includes 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 plurality of serially connected sound wave transceiver units are located between the third transmission wheel and the fifth transmission wheel, the synchronous belt sequentially passes through the third transmission wheel, the second transmission wheel, the first transmission wheel, the fourth transmission wheel and the fifth transmission wheel and is connected to the plurality of serially connected sound wave transceiver units; The adjusting arm is a retractable structure to adjust the tightness of the synchronous belt.

8. The array acoustic logging physical simulation experimental system according to claim 7, characterized in that: At least one of the first transmission wheel, the second transmission wheel and the fourth transmission wheel is provided with a manually operable rocker arm.

9. The array acoustic logging physical simulation experimental system according to claim 7, characterized in that: The synchronous 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 synchronous belt at a corresponding position.

10. The array acoustic logging physical simulation experiment system according to claim 7, characterized in that: The transmission structure further includes two third support arms, both of which are located below the crossbeam, and the top ends of the two third support arms are respectively connected to the two ends of the crossbeam, and the bottom ends of the two third support arms are respectively provided with bases, and the two bases are respectively fixed on the two side edges of the container; The third support arm is a telescopic structure to adjust the height of the crossbeam so that the bottoms of the third transmission wheel and the fifth transmission wheel are on the same horizontal line with the central axis of the wellbore.

11. The array acoustic logging physical simulation experiment system according to claim 1, characterized in that: The acoustic wave probe is electrically connected to the acoustic wave excitation and receiving device, and the acoustic wave excitation and receiving device are electrically connected to a signal acquisition instrument and an oscilloscope respectively.

12. A measurement method for array acoustic logging physical simulation experiment, which uses the array acoustic logging physical simulation experiment system according to any one of claims 1 to 11 to perform acoustic logging experiment on a horizontal well, characterized in that: The measuring method comprises the following steps: Step S1: placing a horizontal well simulation member in a container containing liquid, wherein the wellbore on the horizontal well simulation member extends in a horizontal direction and is located below the liquid surface; Step S2: installing a traction positioning device; Step S3: connecting a plurality of acoustic wave transceiver units in series to the synchronous belt of the traction positioning device; Step S4: electrically connecting the acoustic wave probes in the plurality of acoustic wave transceiver units to the acoustic wave excitation and receiving devices respectively; Step S5: adjusting the synchronous belt to be in a tensioned state, and driving the plurality of acoustic wave transceiver units to move to a preset position in the wellbore through the synchronous belt; In step S5, the position data of the preset position is recorded, and the acoustic wave probe corresponding to the transmitting unit in the acoustic wave transceiver unit is stimulated to transmit an acoustic wave signal by the acoustic wave excitation and receiving device, and the acoustic wave probe corresponding to the receiving unit in the acoustic wave transceiver unit receives the acoustic wave signal and records it.

13. The measurement method of array acoustic logging physical simulation experiment according to claim 12, characterized in that: In step S5, the acoustic wave signal is received by a signal acquisition instrument and the waveform is displayed by an oscilloscope.

14. The measurement method of array acoustic logging physical simulation experiment according to claim 12, characterized in that: After step S5, the method further includes: Step S6: driving the plurality of acoustic wave transceiver units to move to the next preset position in the wellbore through the synchronous belt, and repeating the operation of step S5 until the measurement of the preset target well section to be measured is completed; Step S7: Determine whether the collected acoustic wave signal data is qualified. If there is unqualified acoustic wave signal data, re-measure the well section corresponding to the unqualified acoustic wave signal data.

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