Device for improving low-frequency performance of vibroseis

Abstract

The utility model relates to a controllable seismic source low-frequency performance improvement device, and relates to the field of geophysical exploration equipment, the controllable seismic source low-frequency performance improvement device comprises a manifold assembly, one side of the manifold assembly is provided with a high-pressure oil supplementing assembly, and the other side of the manifold assembly is provided with a low-pressure oil supplementing assembly; the manifold assembly is used for supplementing high-pressure oil in the high-pressure oil supplementing assembly to a high-pressure oil port of the heavy punch, supplementing low-pressure oil in the low-pressure oil supplementing assembly to a low-pressure oil port of the heavy punch, and a servo valve is arranged on the manifold assembly. According to the invention, the current old-fashioned vibroseis can meet the low-frequency vibration performance requirement at the present stage.

Description

Technical Field

[0001] This application relates to the field of geophysical exploration equipment, and in particular to a device for improving the low-frequency performance of a controllable seismic source. Background Technology

[0002] Controlled seismic sources are the primary equipment used to generate artificially induced seismic waves. Currently, conventional controlled seismic sources operate at full-load frequencies exceeding 6 Hz. The resulting seismic waves have weak penetration capabilities through specific geological formations, and the reflected signal imaging quality does not meet geophysical requirements. In contrast, low-frequency signals have strong penetration capabilities, making them highly effective for improving reservoir resolution, full-field inversion, enhancing deep imaging quality, and directly detecting oil and gas. Low-frequency controlled seismic source technology arose to meet the requirements of geophysical exploration, becoming a key piece of equipment in low-frequency geophysical exploration. Meeting the quality requirements of low-frequency signals in geophysical exploration is crucial for the development of low-frequency controlled seismic sources.

[0003] Currently, the low-frequency extension of low-frequency sources is also focused on the stroke and flow rate of the vibrator hammer. Increasing the stroke of the vibrator hammer can improve the low-frequency output, while the flow rate of the hydraulic system has become the main factor restricting the low-frequency output. Therefore, increasing the low-frequency flow supply of the system has become the main technical bottleneck of low-frequency controllable sources.

[0004] Regarding the aforementioned technologies, the inventors believe that since there are still a large number of controllable vibration sources, their structural design makes it difficult to meet the current low-frequency vibration performance requirements. Directly replacing them or improving their main equipment would result in a lot of waste and cumbersome operations. Utility Model Content

[0005] In order to enable the current old-fashioned controllable vibration sources to meet the requirements of low-frequency vibration performance at present, this application provides a controllable vibration source low-frequency performance improvement device.

[0006] This application provides a controllable vibration source low-frequency performance improvement device, which adopts the following technical solution:

[0007] A controllable vibration source low-frequency performance improvement device includes a pipe assembly. A high-pressure oil replenishment component is provided on one side of the pipe assembly, and a low-pressure oil replenishment component is provided on the other side of the pipe assembly. The pipe assembly replenishes the high-pressure oil inside the high-pressure oil replenishment component to the high-pressure oil port of the counterweight, and replenishes the low-pressure oil inside the low-pressure oil replenishment component to the low-pressure oil port of the counterweight. A servo valve is provided on the pipe assembly.

[0008] Optionally, the manifold assembly includes a manifold body, on which a high-pressure oil passage is provided, connecting the high-pressure oil port of the servo valve to the high-pressure oil port of the counterweight, and also connecting the high-pressure oil passage to the high-pressure oil replenishment component; the manifold body also has a low-pressure oil passage, connecting the low-pressure oil port of the servo valve to the low-pressure oil port of the counterweight, and also connecting the low-pressure oil passage to the low-pressure oil replenishment component.

[0009] Optionally, the high-pressure oil replenishment assembly includes a high-pressure energy storage device, and a high-pressure replenishment oil passage is provided on the pipeline assembly. One end of the high-pressure replenishment oil passage is connected to the high-pressure energy storage device, and the other end of the high-pressure replenishment oil passage is connected to the high-pressure oil passage.

[0010] Optionally, the high-voltage energy storage device includes a high-level high-voltage energy storage sub-tank and a low-level high-voltage energy storage sub-tank, wherein the capacity of the high-level high-voltage energy storage sub-tank is smaller than the capacity of the low-level high-voltage energy storage sub-tank, and the height of the high-level high-voltage energy storage sub-tank is greater than the height of the low-level high-voltage energy storage sub-tank.

[0011] Optionally, the high-level high-pressure energy storage tank is a 10 cubic inch high-pressure energy storage device; the low-level high-pressure energy storage tank is a 1-gallon high-pressure energy storage device.

[0012] Optionally, the low-pressure oil replenishment assembly includes a low-pressure energy storage device, and a low-pressure replenishment oil passage is provided on the pipeline assembly. One end of the low-pressure replenishment oil passage is connected to the low-pressure energy storage device, and the other end of the low-pressure replenishment oil passage is connected to the low-pressure oil passage.

[0013] Optionally, the low-pressure energy storage device includes a high-level low-pressure energy storage sub-tank and a low-level low-pressure energy storage sub-tank, wherein the capacity of the high-level low-pressure energy storage sub-tank is smaller than the capacity of the low-level low-pressure energy storage sub-tank, and the height of the high-level low-pressure energy storage sub-tank is greater than the height of the low-level low-pressure energy storage sub-tank.

[0014] Optionally, the high-level low-pressure energy storage tank is a 10 cubic inch high-pressure energy storage device; the low-level low-pressure energy storage tank is a 1-gallon high-pressure energy storage device.

[0015] Optionally, the manifold body has an A-port flow channel, which connects the A-port of the counterweight to the A-port of the servo valve.

[0016] Optionally, the manifold body is provided with a B-port flow channel, which connects the B-port of the counterweight to the B-port of the servo valve.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. When the operating frequency of the seismic source is lower than the minimum frequency of peak output, the output is limited by the effective stroke of the counterweight and by the flow rate. Therefore, the vibration performance of the AHV362 and AHV364 controllable seismic sources can be improved by increasing the amount of high-pressure oil at low frequencies.

[0019] 2. The main function of the accumulator is to absorb pressure fluctuations in the hydraulic system, reduce pressure shocks, and replenish insufficient oil in the system. Since the response time of the vibratory pump cannot effectively meet the system's flow requirements at low and high frequencies, the accumulator is needed to replenish oil and absorb pulse fluctuations when the system requires a large instantaneous oil volume.

[0020] 3. Utilizing the functional principle of energy storage devices, an additional energy storage device is added in parallel to the existing structure, and the flow rates of the two energy storage devices are merged to increase the amount of low-frequency instantaneous high-pressure oil and absorb pulse fluctuations, in order to achieve the vibration performance level of a controllable vibration source. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a controllable vibration source low-frequency performance improvement device in an embodiment of this application.

[0022] Figure 2 This is a left-side view of the manifold body of a controllable vibration source low-frequency performance improvement device according to an embodiment of this application.

[0023] Figure 3 This is a right-side view of the manifold body of a controllable vibration source low-frequency performance improvement device according to an embodiment of this application.

[0024] Figure 4 This is a cross-sectional view of the manifold body of a controllable vibration source low-frequency performance improvement device according to an embodiment of this application.

[0025] Explanation of reference numerals in the attached diagram: 1. Manifold assembly; 11. Manifold body; 12. High-pressure oil passage; 13. Low-pressure oil passage; 14. A-port flow channel; 15. B-port flow channel; 16. High-pressure replenishment oil passage; 161. First high-pressure replenishment channel; 162. Second high-pressure replenishment channel; 17. Low-pressure replenishment oil passage; 171. First low-pressure replenishment channel; 172. Second low-pressure replenishment channel; 2. Servo valve; 3. High-pressure oil replenishment assembly; 31. High-pressure accumulator; 311. High-level high-pressure energy storage sub-tank; 312. Low-level high-pressure energy storage sub-tank; 4. Low-pressure oil replenishment assembly; 41. Low-pressure accumulator; 411. High-level low-pressure energy storage sub-tank; 412. Low-level low-pressure energy storage sub-tank. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0028] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0029] This application discloses a device for improving the low-frequency performance of a controllable vibration source. (Refer to...) Figure 1 A controllable vibration source low-frequency performance improvement device includes a pipe assembly 1, one side of which is fixedly connected to a counterweight, and a servo valve 2 is fixedly connected to the side of the pipe assembly 1 opposite to the counterweight. A high-pressure oil replenishment component 3 is provided on one side of the pipe assembly 1, which is used to replenish the high-pressure oil of the counterweight. A low-pressure oil replenishment component 4 is also provided on the side of the pipe assembly 1 opposite to the high-pressure oil replenishment component 3, which is used to replenish the low-pressure oil of the counterweight.

[0030] The output of a controllable seismic source in the low-frequency range is limited by the stroke and flow rate of the hammer. As shown in the following formula,

[0031] F p =9.87M M fL p / A p

[0032] Among them, F p For peak output; M M Let f be the mass of the hammer; f be the frequency; L be the frequency. p For the stroke of the hammer; A p This represents the piston area.

[0033] When the operating frequency of the seismic source is lower than the minimum frequency of peak output, the output is limited by the effective stroke of the counterweight and by the flow rate. Therefore, the vibration performance of the AHV362 and AHV364 controllable seismic sources can be improved by increasing the amount of high-pressure oil at low frequencies.

[0034] Reference Figure 2 , Figure 3The manifold assembly 1 includes a manifold body 11, which is a rectangular structure. The width of the manifold body 11 extends from one side of the servo valve 2 to the side of the counterweight, and the length of the manifold body extends horizontally perpendicular to the width direction.

[0035] A high-pressure oil passage 12 is formed along the width direction on the side wall of the manifold body 11, completely penetrating the manifold body 11. One end of the high-pressure oil passage 12 is connected to the high-pressure oil port of the servo valve 2, and the other end is connected to the high-pressure oil port of the counterweight. A low-pressure oil passage 13 is formed along the width direction on the side wall of the manifold body 11, completely penetrating the manifold body 11. One end of the low-pressure oil passage 13 is connected to the low-pressure oil port of the servo valve 2, and the other end is connected to the low-pressure oil port of the counterweight.

[0036] The manifold body 11 has an A-port flow channel 14 along its width direction on its side wall. The A-port flow channel 14 completely penetrates the manifold body 11, and one end of the A-port flow channel 14 is connected to the A-port of the servo valve 2, while the other end is connected to the A-port of the counterweight. The manifold body 11 also has a B-port flow channel 15 along its width direction on its side wall. The B-port flow channel 15 completely penetrates the manifold body 11, and one end of the B-port flow channel 15 is connected to the B-port of the servo valve 2, while the other end is connected to the B-port of the counterweight.

[0037] The high-pressure oil replenishment component 3 includes a high-pressure accumulator. The main function of the accumulator is to absorb pressure fluctuations in the hydraulic system, reduce pressure shocks, and replenish insufficient oil in the system. Since the response time of the vibratory pump cannot effectively meet the system's flow requirements at low and high frequencies, the accumulator is needed to replenish oil and absorb pulse fluctuations when the system requires a large instantaneous oil volume.

[0038] Reference Figure 1 , Figure 4 In some embodiments, the high-voltage energy storage unit 31 includes a high-level high-voltage energy storage sub-tank 311 and a low-level high-voltage energy storage sub-tank 312. The height of the high-level high-voltage energy storage sub-tank 311 is greater than that of the low-level high-voltage energy storage sub-tank 312, and the capacity of the high-level high-voltage energy storage sub-tank 311 is smaller than that of the low-level high-voltage energy storage sub-tank 312. The high-level high-voltage energy storage sub-tank 311 is in contact with the vertical sidewall of the manifold body 11, and the low-level high-voltage energy storage sub-tank 312 is in contact with the top sidewall of the manifold body 11. In a specific embodiment, the high-level high-voltage energy storage sub-tank 311 is a 10 cubic inch high-voltage energy storage unit, and the low-level high-voltage energy storage sub-tank 312 is a 1-gallon high-voltage energy storage unit.

[0039] A high-pressure replenishment oil passage 16 is provided on the side wall of the manifold body 11. The high-pressure replenishment oil passage 16 includes a first high-pressure replenishment channel 161 opposite to the high-level high-pressure energy storage sub-tank 311. One end of the first high-pressure replenishment channel 161 is connected to the high-level high-pressure energy storage sub-tank 311, and the other end of the first high-pressure replenishment channel 161 is connected to the high-pressure oil passage 12. A second high-pressure replenishment channel 162 is also provided on the side wall of the manifold body 11. One end of the second high-pressure replenishment channel 162 is connected to the low-level high-pressure energy storage sub-tank 312, and the other end of the second high-pressure replenishment channel 162 is connected to the high-pressure oil passage 12.

[0040] In some embodiments, the low-pressure energy storage unit 41 includes a high-level low-pressure energy storage sub-tank 411 and a low-level low-pressure energy storage sub-tank 412. The height of the high-level low-pressure energy storage sub-tank 411 is greater than that of the low-level low-pressure energy storage sub-tank 412, and the capacity of the high-level low-pressure energy storage sub-tank 411 is smaller than that of the low-level high-low energy storage sub-tank. The high-level low-pressure energy storage sub-tank 411 is in contact with the vertical sidewall of the manifold body 11, and the low-level high-low energy storage sub-tank is in contact with the top sidewall of the manifold body 11.

[0041] In a specific embodiment, the high-level low-pressure energy storage tank 411 is a 10 cubic inch high-pressure energy storage device, and the low-level low-pressure energy storage tank 412 is a 1-gallon high-pressure energy storage device.

[0042] A low-pressure replenishment oil passage 17 is provided on the side wall of the manifold body 11. The low-pressure replenishment oil passage 17 includes a first low-pressure replenishment channel 171 opposite to the high-level low-pressure energy storage sub-tank 411. One end of the first low-pressure replenishment channel 171 is connected to the high-level low-pressure energy storage sub-tank 411, and the other end of the first low-pressure replenishment channel 171 is connected to the low-pressure oil passage 13. A second low-pressure replenishment channel 172 is also provided on the side wall of the manifold body 11. One end of the second low-pressure replenishment channel 172 is connected to the low-level low-pressure energy storage sub-tank 412, and the other end of the second low-pressure replenishment channel 172 is connected to the low-pressure oil passage 13.

[0043] By utilizing the functional principle of energy storage devices, an additional energy storage device is added in parallel to the existing structure, and the flow rates of the two energy storage devices are merged to increase the amount of low-frequency instantaneous high-pressure oil and absorb pulse fluctuations, in order to achieve the vibration performance level of a controllable vibration source.

[0044] The high-pressure energy stored in the two high-pressure energy storage devices 31 is combined into the high-pressure oil channel 12 of the hammer through the oil channel, and the low-pressure energy stored in the two low-pressure energy storage devices 41 is combined into the low-pressure oil channel 13 of the hammer through the oil channel. Together, they replenish the low-frequency instantaneous high-pressure oil and absorb pulse fluctuations, thereby improving the low-frequency vibration performance of the controllable source.

[0045] In this application, the term "multiple" refers to at least two or more, unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. 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.

Claims

1. A controllable vibration source low-frequency performance improvement device, characterized in that: The assembly includes a pipe assembly (1), on one side of which a high-pressure oil replenishment component (3) is provided, and on the other side of which a low-pressure oil replenishment component (4) is provided. The pipe assembly (1) replenishes the high-pressure oil inside the high-pressure oil replenishment component (3) to the high-pressure oil port of the counterweight, and the pipe assembly (1) replenishes the low-pressure oil inside the low-pressure oil replenishment component (4) to the low-pressure oil port of the counterweight. A servo valve (2) is provided on the pipe assembly (1), and the servo valve (2) is connected to the high-pressure oil replenishment component (3). The servo valve (2) controls the amount of oil entering the pipe assembly (1) from the high-pressure oil replenishment component (3). The servo valve (2) is connected to the low-pressure oil replenishment component (4), and the servo valve (2) controls the amount of oil entering the pipe assembly (1) from the low-pressure oil replenishment component (4).

2. The controllable vibration source low-frequency performance improvement device according to claim 1, characterized in that: The manifold assembly (1) includes a manifold body (11), on which a high-pressure oil passage (12) is provided. The high-pressure oil passage (12) connects the high-pressure oil port of the servo valve (2) with the high-pressure oil port of the counterweight. The high-pressure oil passage (12) is also connected to the high-pressure oil replenishment component (3). The manifold body (11) has a low-pressure oil passage (13), on which the low-pressure oil passage (13) connects the low-pressure oil port of the servo valve (2) with the low-pressure oil port of the counterweight. The low-pressure oil passage (13) is also connected to the low-pressure oil replenishment component (4).

3. The controllable vibration source low-frequency performance improvement device according to claim 2, characterized in that: The high-pressure oil replenishment assembly (3) includes a high-pressure energy storage device (31). A high-pressure replenishment oil passage (16) is provided on the pipeline assembly (1). One end of the high-pressure replenishment oil passage (16) is connected to the high-pressure energy storage device (31), and the other end of the high-pressure replenishment oil passage (16) is connected to the high-pressure oil passage (12).

4. The controllable vibration source low-frequency performance improvement device according to claim 3, characterized in that: The high-voltage energy storage device (31) includes a high-level high-voltage energy storage sub-tank (311) and a low-level high-voltage energy storage sub-tank (312). The capacity of the high-level high-voltage energy storage sub-tank (311) is smaller than the capacity of the low-level high-voltage energy storage sub-tank (312), and the height of the high-level high-voltage energy storage sub-tank (311) is higher than the height of the low-level high-voltage energy storage sub-tank (312).

5. The controllable vibration source low-frequency performance improvement device according to claim 4, characterized in that: The high-pressure energy storage sub-tank (311) is a 10 cubic inch high-pressure energy storage device; the low-pressure energy storage sub-tank (312) is a 1-gallon high-pressure energy storage device.

6. The controllable vibration source low-frequency performance improvement device according to claim 2, characterized in that: The low-pressure oil replenishment assembly (4) includes a low-pressure energy storage device (41). A low-pressure replenishment oil passage (17) is provided on the pipeline assembly (1). One end of the low-pressure replenishment oil passage (17) is connected to the low-pressure energy storage device (41), and the other end of the low-pressure replenishment oil passage (17) is connected to the low-pressure oil passage (13).

7. The controllable vibration source low-frequency performance improvement device according to claim 6, characterized in that: The low-pressure energy storage device (41) includes a high-level low-pressure energy storage sub-tank (411) and a low-level low-pressure energy storage sub-tank (412). The capacity of the high-level low-pressure energy storage sub-tank (411) is smaller than the capacity of the low-level low-pressure energy storage sub-tank (412), and the height of the high-level low-pressure energy storage sub-tank (411) is higher than the height of the low-level low-pressure energy storage sub-tank (412).

8. The controllable vibration source low-frequency performance improvement device according to claim 7, characterized in that: The high-level low-pressure energy storage sub-tank (411) is a 10 cubic inch high-pressure energy storage device; the low-level low-pressure energy storage sub-tank (412) is a 1-gallon high-pressure energy storage device.

9. The controllable vibration source low-frequency performance improvement device according to claim 2, characterized in that: The manifold body (11) has an A-port flow channel (14) that connects the A-port of the counterweight to the A-port of the servo valve (2).

10. The controllable vibration source low-frequency performance improvement device according to claim 2, characterized in that: The manifold body (11) has a B-port flow channel (15) that connects the B-port of the counterweight to the B-port of the servo valve (2).

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