A downhole cavity medium acoustic velocity measurement system, method, electronic device and medium

Abstract

The application relates to a downhole cavity medium sound velocity measurement system, method, electronic device and medium, which comprises an instrument shell, a first transceiving circuit, a first acoustic transducer, a second transceiving circuit, a second acoustic transducer, a semicircular baffle and a control device; the first transceiving circuit is used for controlling the first acoustic transducer to emit a first sound wave and receiving a first echo and a second echo; the second transceiving circuit is used for controlling the second acoustic transducer to emit a second sound wave and receiving a third echo and a fourth echo; the control device is used for determining a medium where the system is located according to the first sound wave, the first echo, the second echo, the second sound wave, the third echo and the fourth echo; if the medium is a gas, the sound velocity corresponding to the gas medium is determined according to the first echo and the second echo; if the medium is a liquid, the sound velocity corresponding to the liquid medium is determined according to the third echo and the fourth echo. The problem that a single acoustic transducer is difficult to simultaneously adapt to different media is solved.

Description

Technical Field

[0001] This invention relates to the field of ranging sonar technology, and in particular to a sound velocity measurement system, method, electronic device and medium for downhole cavity media. Background Technology

[0002] The acoustic measurement equipment for salt cavern underground gas storage mainly consists of a distance measuring sub and a velocity measuring sub. During operation, the distance measuring transducer excites a sound wave signal and measures the echo signal from the cavity wall, while the acoustic transducer measures the sound velocity of the medium at the current location. By combining the two, the distance from the instrument to the cavity wall can be determined, thereby obtaining the shape and volume of the cavity. One of the main problems with the current sound velocity measurement section is that it only has one acoustic transducer (liquid acoustic transducer or gas acoustic transducer). The actual cavity contains both fluid and gas, requiring it to be applicable to both water and gas media. However, in actual measurements, the sound wave amplitude of a single acoustic transducer differs significantly between fluid and gas environments. The transmitting and acquiring circuits need to be adapted accordingly, and the transducer also needs to be impedance matched. Furthermore, this signal difference poses a challenge to subsequent processing when the measurement environment is unknown, necessitating the development of adaptive algorithms. Moreover, fluid and gas ranging transducers have different frequencies, making it difficult for a single acoustic transducer to match them. This results in a difference in the frequency of the sound velocity measurement and the ranging transducer, affecting the accuracy of the cavity measurement. Summary of the Invention

[0003] To overcome the problem that a single acoustic transducer is difficult to adapt to different media simultaneously, this invention provides a downhole cavity medium sound velocity measurement system, method, electronic equipment, and medium.

[0004] In a first aspect, in order to solve the above-mentioned technical problems, the present invention provides a downhole cavity medium sound velocity measurement system, including an instrument housing, a first transceiver circuit, a first acoustic transducer, a second transceiver circuit, a second acoustic transducer, a semi-circular baffle, and a control device.

[0005] The instrument housing has a semi-open cavity. The first acoustic transducer and the second acoustic transducer are respectively located at both ends of the instrument housing. The semi-circular baffle is located in the middle of the instrument housing and in the cavity. The height of the first acoustic transducer is the same as that of the second acoustic transducer. The height of the semi-circular baffle is half the height of the first acoustic transducer. The first transceiver circuit is connected to the first acoustic transducer, and the second transceiver circuit is connected to the second acoustic transducer.

[0006] The first transceiver circuit is used to control the first acoustic transducer to emit the first sound wave and receive the first echo reflected back by the semi-circular baffle and the second echo reflected back by the second acoustic transducer.

[0007] The second transceiver circuit is used to control the second acoustic transducer to emit a second sound wave and to receive the third echo reflected back by the semi-circular baffle and the fourth echo reflected back by the first acoustic transducer.

[0008] The control device is used to determine the medium in which the system is located based on the first sound wave, the first echo, the second echo, the second sound wave, the third echo, and the fourth echo; if the medium is a gas, the speed of sound corresponding to the gas medium is determined based on the first and second echoes; if the medium is a liquid, the speed of sound corresponding to the liquid medium is determined based on the third and fourth echoes.

[0009] The beneficial effects of the downhole cavity medium sound velocity measurement system provided by this invention are as follows: For a downhole cavity, the acoustic transducer (first acoustic transducer or second acoustic transducer) is controlled by a transceiver circuit (first transceiver circuit or second transceiver circuit) to emit sound waves, and different echoes are generated by utilizing the height difference between the semi-circular baffle and the acoustic transducer. The medium in the downhole cavity can be determined by the acoustic characteristics between the first sound wave, the first echo, the second echo, the second sound wave, the third echo, and the fourth echo. According to different media, different echo signals (first echo, second echo, third echo, and fourth echo) are used to obtain the sound velocity in that medium. This downhole cavity medium sound velocity measurement system can be used simultaneously in gaseous and liquid media, solving the problem that a single acoustic transducer is difficult to adapt to different media at the same time.

[0010] Secondly, the present invention provides a method for measuring the sound velocity of a medium in a downhole cavity, the method comprising:

[0011] Control the first acoustic transducer to emit the first sound wave, and receive the first echo reflected back by the semi-circular baffle, and the second echo reflected back by the second acoustic transducer.

[0012] Control the second acoustic transducer to emit a second sound wave, and receive the third echo reflected back by the semi-circular baffle, as well as the fourth echo reflected back by the first acoustic transducer.

[0013] The medium in which the system is located is determined based on the first sound wave, the first echo, the second echo, the second sound wave, the third echo, and the fourth echo. If the medium is a gas, the speed of sound corresponding to the gas medium is determined based on the first and second echoes. If the medium is a liquid, the speed of sound corresponding to the liquid medium is determined based on the third and fourth echoes.

[0014] Thirdly, the present invention also provides an electronic device, including a memory, a processor, and a program stored in the memory and running on the processor, wherein the processor executes the program to implement the steps of the downhole cavity medium sound velocity measurement method described above.

[0015] Fourthly, the present invention also provides a computer-readable storage medium storing instructions that, when executed on a terminal device, cause the terminal device to perform the steps of a method for measuring the sound velocity of a downhole cavity medium. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of a downhole cavity medium sound velocity measurement system according to an embodiment of the present invention;

[0018] Figure 2 This is the amplitude diagram of the first waveform;

[0019] Figure 3 This is a flowchart illustrating a method for measuring the sound velocity of a downhole cavity medium according to an embodiment of the present invention. Detailed Implementation

[0020] The following embodiments are further explanations and supplements to the present invention and do not constitute any limitation on the present invention.

[0021] The following describes, with reference to the accompanying drawings, an embodiment of the present invention, a downhole cavity medium sound velocity measurement system, method, electronic device, and medium.

[0022] like Figure 1 As shown, this embodiment of the invention provides a downhole cavity medium sound velocity measurement system, including an instrument housing 1, a first transceiver circuit 2, a first acoustic transducer 3, a second transceiver circuit 4, a second acoustic transducer 5, a semi-circular baffle 6, and a control device.

[0023] The instrument housing has a semi-open cavity. When a downhole cavity medium sound velocity measurement system is placed in a downhole cavity, the semi-open cavity will fill with gas or liquid, allowing for sound velocity measurement of the gas or liquid within the semi-open cavity.

[0024] The first acoustic transducer and the second acoustic transducer are respectively located at both ends of the instrument housing. The semi-circular baffle is located in the middle of the instrument housing and in the cavity. The distance L1 between the first acoustic transducer and the second acoustic transducer is 12cm, the distance L2 between the first acoustic transducer and the semi-circular baffle is 5cm, and the distance L3 between the second acoustic transducer and the semi-circular baffle is 5cm.

[0025] The height of the first acoustic transducer is the same as that of the second acoustic transducer. The height of the semi-circular baffle is half the height of either the first or second acoustic transducer. When the acoustic transducer emits a sound wave signal, due to the height difference between the acoustic transducer and the semi-circular baffle, the sound wave signal will bounce back different echo signals when it encounters different objects. For example, the first sound wave emitted by the first acoustic transducer is reflected back to the first echo when it encounters the semi-circular baffle, and the first sound wave is reflected back to the second echo when it encounters the second sound wave transducer. Similarly, the second sound wave emitted by the second acoustic transducer is reflected back to the third echo when it encounters the semi-circular baffle, and the second sound wave is reflected back to the fourth echo when it encounters the first sound wave transducer.

[0026] A first transceiver circuit is connected to a first acoustic transducer, and a second transceiver circuit is connected to a second acoustic transducer. The first transceiver circuit includes a first transmitting circuit and a first acquisition and communication circuit, and the second transceiver circuit includes a second transmitting circuit and a second acquisition and communication circuit. The first transmitting circuit and the first acquisition and communication circuit are connected to the first acoustic transducer, and the second transmitting circuit and the second acquisition and communication circuit are connected to the second acoustic transducer. The first transmitting circuit is used to control the first acoustic transducer to emit a first sound wave, the first acquisition and communication circuit is used to receive a first echo and a second echo, the second transmitting circuit is used to control the second acoustic transducer to emit a second sound wave, and the second acquisition and communication circuit is used to receive a third echo and a fourth echo.

[0027] The control device is used to determine the medium in which the system is located based on the first sound wave, the first echo, the second echo, the second sound wave, the third echo, and the fourth echo; if the medium is a gas, the speed of sound corresponding to the gas medium is determined based on the first and second echoes; if the medium is a liquid, the speed of sound corresponding to the liquid medium is determined based on the third and fourth echoes.

[0028] This embodiment of a downhole cavity medium sound velocity measurement system, for a downhole cavity, controls an acoustic transducer (first acoustic transducer or second acoustic transducer) to emit sound waves through a transceiver circuit (first transceiver circuit or second transceiver circuit), and uses the height difference between a semi-circular baffle and the acoustic transducer to generate different echoes. By analyzing the acoustic characteristics between the first sound wave, the first echo, the second echo, the second sound wave, the third echo, and the fourth echo, the medium in the downhole cavity can be determined. According to different media, different echo signals (first echo, second echo, third echo, and fourth echo) are used to obtain the sound velocity in that medium. This downhole cavity medium sound velocity measurement system can be used simultaneously in gaseous and liquid media, solving the problem that a single acoustic transducer is difficult to adapt to different media at the same time.

[0029] Optionally, the control device is specifically configured to: determine a first waveform amplitude based on a first sound wave, a first echo, and a second echo; determine a first arrival time corresponding to the arrival of the first echo at the first acoustic transducer and a second arrival time corresponding to the arrival of the second echo at the first acoustic transducer based on the first echo and the second echo; determine a first time difference between the first arrival time and the second arrival time based on the first arrival time and the second arrival time; determine a second waveform amplitude based on a second sound wave, a third echo, and a fourth echo; determine a third arrival time corresponding to the arrival of the third echo at the second acoustic transducer and a fourth arrival time corresponding to the arrival of the fourth echo at the second acoustic transducer based on the third echo and the fourth arrival time; determine a second time difference between the third arrival time and the fourth arrival time based on the third arrival time and the fourth arrival time; if the first waveform amplitude satisfies a first preset waveform amplitude and the first time difference is within a first preset range, then the medium is determined to be a gas; if the second waveform amplitude satisfies a second preset waveform amplitude and the second time difference is within a second preset range, then the medium is determined to be a liquid.

[0030] Because different acoustic transducers exhibit significant differences in waveform amplitude and sound velocity in different media, the waveform amplitude and arrival time difference can be used to quickly determine the current medium. For example:

[0031] The time t11 for the first echo to reach the first acoustic transducer was measured to be 12.5 μs, and the time t12 for the second echo to reach the first acoustic transducer was measured to be 79.15 μs. Therefore, the first time difference DT is DT = (79.15 - 12.5) = 66.65 μs. Then, by plotting the amplitudes of the first sound wave, the first echo, and the second echo, as shown below... Figure 2 As shown, based on whether the waveform shape of the first waveform amplitude and the first time difference fall within the first preset range, the medium can be quickly determined to be a liquid. Similarly, by measuring the time t21 when the third echo arrives at the second acoustic transducer and the time t22 when the fourth echo arrives at the second acoustic transducer, the second time difference can be obtained. By plotting the second waveform amplitudes of the second sound wave, the third echo, and the fourth echo, the gas medium can be quickly determined based on the waveform shape of the second waveform amplitude and whether the second time difference falls within the second preset range. It should be noted that the first preset range and the second preset range are set according to the actual situation.

[0032] Optionally, the control device is specifically used to: acquire a first path difference between the first acoustic transducer and the semi-circular baffle and the second acoustic transducer, and acquire a second path difference between the second acoustic transducer and the semi-circular baffle and the first acoustic transducer; if the medium is gas, determine the sound velocity corresponding to the gas medium based on the first time difference and the first path difference; if the medium is liquid, determine the sound velocity corresponding to the liquid medium based on the second time difference and the second path difference.

[0033] The formula for determining the speed of sound is:

[0034] v = DS / DT;

[0035] If DT is the first time difference and DS is the first path difference, then v represents the speed of sound in the gas medium. If DT is the second time difference and DS is the second path difference, then v represents the speed of sound in the liquid medium.

[0036] For example, given the first time difference DT = 66.65us and the first path difference DS = (12-5) = 7cm, the sound velocity corresponding to the liquid medium is v = DS / DT = 1050m / s.

[0037] Optionally, a downhole cavity medium sound velocity measurement system can be placed at different depths in the downhole cavity to obtain the medium and the corresponding sound velocity at different depths, thereby obtaining a sound velocity curve. The sound velocity curve represents the correspondence between the depth of the downhole cavity and the sound velocity, and the user can obtain the sound velocity at different depths in the downhole cavity through the sound velocity curve.

[0038] like Figure 3 As shown, this embodiment of the invention also provides a method for measuring the sound velocity of a downhole cavity medium, comprising the following steps:

[0039] S1. Control the first acoustic transducer to emit the first sound wave and receive the first echo reflected back by the semi-circular baffle and the second echo reflected back by the second acoustic transducer.

[0040] S2. Control the second acoustic transducer to emit a second sound wave and receive the third echo reflected back by the semi-circular baffle and the fourth echo reflected back by the first acoustic transducer.

[0041] S3. Determine the medium of the system based on the first sound wave, the first echo, the second echo, the second sound wave, the third echo, and the fourth echo; if the medium is a gas, determine the speed of sound corresponding to the gas medium based on the first and second echoes; if the medium is a liquid, determine the speed of sound corresponding to the liquid medium based on the third and fourth echoes.

[0042] Optionally, the medium in which the system is located is determined based on the first sound wave, the first echo, the second echo, the second sound wave, the third echo, and the fourth echo, including:

[0043] The amplitude of the first waveform is determined based on the first sound wave, the first echo, and the second echo.

[0044] Based on the first echo and the second echo, determine the first arrival time corresponding to the arrival of the first echo at the first acoustic transducer, and the second arrival time corresponding to the arrival of the second echo at the first acoustic transducer.

[0045] Based on the first arrival time and the second arrival time, determine the first time difference between the first arrival time and the second arrival time;

[0046] The amplitude of the second waveform is determined based on the second sound wave, the third echo, and the fourth echo;

[0047] Based on the third and fourth echoes, determine the third arrival time corresponding to the third echo reaching the second acoustic transducer, and the fourth arrival time corresponding to the fourth echo reaching the second acoustic transducer; based on the third and fourth arrival times, determine the second time difference between the third and fourth arrival times.

[0048] If the amplitude of the first waveform meets the first preset waveform amplitude and the first time difference is within the first preset range, then the medium is determined to be gas.

[0049] If the amplitude of the second waveform meets the second preset waveform amplitude and the second time difference is within the second preset range, then the medium is determined to be liquid.

[0050] Optionally, if the medium is a gas, the speed of sound corresponding to the gas medium is determined based on the first and second echoes; if the medium is a liquid, the speed of sound corresponding to the liquid medium is determined based on the third and fourth echoes, including:

[0051] Obtain the first path difference between the first acoustic transducer and the semi-circular baffle and the second acoustic transducer, and obtain the second path difference between the second acoustic transducer and the semi-circular baffle and the first acoustic transducer.

[0052] If the medium is gas, the speed of sound corresponding to the gas medium is determined based on the first time difference and the first path difference; if the medium is liquid, the speed of sound corresponding to the liquid medium is determined based on the second time difference and the second path difference.

[0053] Alternatively, the speed of sound can be determined using the following formula:

[0054] v = DS / DT;

[0055] Wherein, if DT is the first time difference and DS is the first path difference, then v represents the speed of sound corresponding to the gas medium; when DT is the second time difference and DS is the second path difference, then v represents the speed of sound corresponding to the liquid medium.

[0056] Optionally, the method further includes:

[0057] The medium and the corresponding sound velocity in the downhole cavity at different depths are obtained. Based on each sound velocity, a sound velocity curve is determined, which represents the correspondence between the depth of the downhole cavity and the sound velocity.

[0058] An electronic device according to an embodiment of the present invention includes a memory, a processor, and a program stored in the memory and running on the processor. When the processor executes the program, it implements some or all of the steps of the above-described method for measuring the sound velocity of a downhole cavity medium.

[0059] The electronic device can be a computer, and the corresponding program is computer software. The parameters and steps of the electronic device of the present invention can be referred to the parameters and steps in the embodiment of the downhole cavity medium sound velocity measurement method above, and will not be repeated here.

[0060] Those skilled in the art will recognize that this invention can be implemented as a system, method, or computer program product. Therefore, this disclosure can be embodied in the following forms: it can be entirely hardware, entirely software (including firmware, resident software, microcode, etc.), or a combination of hardware and software, generally referred to herein as a "circuit," "module," or "system." Furthermore, in some embodiments, the invention can also be implemented as a computer program product contained in one or more computer-readable media, which contains computer-readable program code. Computer-readable storage media can be, for example, but not limited to—electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A downhole cavity medium sound velocity measurement system, characterized in that, It includes an instrument housing, a first transceiver circuit, a first acoustic transducer, a second transceiver circuit, a second acoustic transducer, a semi-circular baffle, and a control device; The instrument housing has a semi-open cavity. The first acoustic transducer and the second acoustic transducer are respectively disposed at both ends of the instrument housing. The semi-circular baffle is disposed in the middle of the instrument housing and located in the cavity. The height of the first acoustic transducer is the same as the height of the second acoustic transducer. The height of the semi-circular baffle is half the height of the first acoustic transducer. The first transceiver circuit is connected to the first acoustic transducer, and the second transceiver circuit is connected to the second acoustic transducer. The first transceiver circuit is used to control the first acoustic transducer to emit a first sound wave and receive the first echo reflected back by the semi-circular baffle and the second echo reflected back by the second acoustic transducer. The second transceiver circuit is used to control the second acoustic transducer to emit a second sound wave and to receive the third echo reflected back by the semi-circular baffle and the fourth echo reflected back by the first acoustic transducer. The control device is used to determine the medium in which the system is located based on the first sound wave, the first echo, the second echo, the second sound wave, the third echo, and the fourth echo; if the medium is a gas, the speed of sound corresponding to the gas medium is determined based on the first echo and the second echo; if the medium is a liquid, the speed of sound corresponding to the liquid medium is determined based on the third echo and the fourth echo.

2. The system according to claim 1, characterized in that, The control device is specifically used for: The amplitude of the first waveform is determined based on the first sound wave, the first echo, and the second echo. Based on the first echo and the second echo, determine the first time difference between the arrival of the first echo at the first acoustic transducer and the arrival of the second echo at the first acoustic transducer. The amplitude of the second waveform is determined based on the second sound wave, the third echo, and the fourth echo; Based on the third echo and the fourth echo, a second time difference is determined between the arrival of the third echo at the second acoustic transducer and the arrival of the fourth echo at the second acoustic transducer. If the amplitude of the first waveform meets the first preset waveform amplitude, and the first time difference is within the first preset range, then the medium is determined to be gas. If the amplitude of the second waveform meets the second preset waveform amplitude, and the second time difference is within the second preset range, then the medium is determined to be a liquid.

3. The system according to claim 2, characterized in that, The control device is specifically used for: Obtain the first path difference between the first acoustic transducer and the semi-circular baffle and the second acoustic transducer, and obtain the second path difference between the second acoustic transducer and the semi-circular baffle and the first acoustic transducer; If the medium is a gas, the speed of sound corresponding to the gas medium is determined based on the first time difference and the first path difference; if the medium is a liquid, the speed of sound corresponding to the liquid medium is determined based on the second time difference and the second path difference.

4. The system according to claim 3, characterized in that, The control device determines the speed of sound using the following formula: v = DS / DT; Wherein, if DT is the first time difference and DS is the first path difference, then v represents the speed of sound corresponding to the gas medium; when DT is the second time difference and DS is the second path difference, then v represents the speed of sound corresponding to the liquid medium.

5. The system according to any one of claims 1-4, characterized in that, The distance between the first acoustic transducer and the second acoustic transducer is 12cm, the distance between the first acoustic transducer and the semi-circular baffle is 5cm, and the distance between the second acoustic transducer and the semi-circular baffle is 5cm.

6. The system according to any one of claims 1-4, characterized in that, The first transceiver circuit includes a first transmitting circuit and a first acquisition and communication circuit, and the second transceiver circuit includes a second transmitting circuit and a second acquisition and communication circuit. The first transmitting circuit and the first acquisition and communication circuit are connected to the first acoustic transducer, and the second transmitting circuit and the second acquisition and communication circuit are connected to the second acoustic transducer. The first transmitting circuit is used to control the first acoustic transducer to emit a first sound wave, the first acquisition and communication circuit is used to receive a first echo and a second echo, the second transmitting circuit is used to control the second acoustic transducer to emit a second sound wave, and the second acquisition and communication circuit is used to receive a third echo and a fourth echo.

7. The system according to any one of claims 1-4, characterized in that, The control device is also used for: The medium and the corresponding sound velocity in the downhole cavity at different depths are obtained. Based on each sound velocity, a sound velocity curve is determined, which represents the correspondence between the depth of the downhole cavity and the sound velocity.

8. A method for measuring the sound velocity of a medium in a downhole cavity, characterized in that, The method utilizes the downhole cavity medium sound velocity measurement system according to any one of claims 1 to 7, comprising: The first acoustic transducer is controlled to emit a first sound wave, and the first echo reflected back by the semi-circular baffle and the second echo reflected back by the second acoustic transducer are received. Control the second acoustic transducer to emit a second sound wave, and receive the third echo reflected back by the semi-circular baffle, as well as the fourth echo reflected back by the first acoustic transducer. The medium in which the system is located is determined based on the first sound wave, the first echo, the second echo, the second sound wave, the third echo, and the fourth echo; if the medium is a gas, the speed of sound corresponding to the gas medium is determined based on the first echo and the second echo; if the medium is a liquid, the speed of sound corresponding to the liquid medium is determined based on the third echo and the fourth echo.

9. An electronic device comprising a memory, a processor, and a program stored in the memory and running on the processor, characterized in that, When the processor executes the program, it implements the steps of the downhole cavity medium sound velocity measurement method as described in claim 8.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions that, when executed on a terminal device, cause the terminal device to perform the steps of the downhole cavity medium sound velocity measurement method as described in claim 8.

Images