Gas extraction drill hole crack analysis device, system and method based on electromagnetic waves

Abstract

The invention relates to a gas extraction drill hole crack analysis device, system and method based on electromagnetic waves, the crack analysis device comprises a transmitting rod arranged in a first drill hole and a receiving rod arranged in a second drill hole, and in the first drill hole, position data of an electromagnetic wave receiver at the current position is obtained; based on the position data, a corresponding electromagnetic wave emitter is arranged in the second drill hole, so that the electromagnetic wave emitter sends at least one electromagnetic wave signal according to the position data; calculating the at least one electromagnetic wave signal based on a preset electromagnetic wave attenuation coefficient, and determining electromagnetic wave energy loss at the current position; and on the basis of the electromagnetic wave energy loss, crack density data in the corresponding drill hole is determined. The coal seam geological crack distribution characteristics at the current position are accurately reflected, the crack density detection precision is improved, and the safety during exploration and excavation collection work is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of intelligent exploration technology, and in particular to a gas extraction drilling crack analysis device, system and method based on electromagnetic waves. Background Art

[0002] In the process of mine gas extraction, accurate detection of crack density is crucial to the drilling sealing effect and efficient gas extraction.

[0003] Since the existing methods for analyzing borehole cracks based on electromagnetic waves mostly adopt the method of transmitting and receiving at fixed positions, and lack the ability to adjust the layout of the transmitter and receiver based on the actual crack position, the signal accuracy is reduced and the detection range is limited. Therefore, the existing methods for analyzing borehole cracks based on electromagnetic waves for gas extraction have the problem of collecting and analyzing electromagnetic wave signals at fixed positions, which makes it impossible to adjust the power and direction of electromagnetic wave transmission according to the actual crack position, resulting in reduced electromagnetic wave signal accuracy and inaccurate crack feature data obtained from the corresponding analysis. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a gas extraction borehole crack analysis device, system and method based on electromagnetic waves to solve the problem that the existing gas extraction borehole crack analysis method based on electromagnetic waves adopts a fixed position to collect and analyze electromagnetic wave signals, resulting in the inability to adjust the power and direction of electromagnetic wave emission according to the actual crack position, which reduces the accuracy of electromagnetic wave signals and causes inaccurate crack feature data obtained by corresponding analysis.

[0005] The object of the present invention is achieved in that: A gas extraction borehole crack analysis device based on electromagnetic waves is arranged in a gas extraction borehole formation, wherein at least two boreholes are extracted and drilled in the formation: a first borehole and a second borehole, and the crack analysis device comprises: A first acquisition module is disposed in the first borehole to acquire position data of an electromagnetic wave receiver at a current position; A second acquisition module is disposed in the second borehole, and based on the position data, a corresponding electromagnetic wave transmitter is disposed in the second borehole, so that the electromagnetic wave transmitter can send at least one electromagnetic wave signal according to the position data; A first determination module calculates at least one electromagnetic wave signal based on a preset electromagnetic wave attenuation coefficient to determine the electromagnetic wave energy loss at the current position; The second determination module determines crack density data in the corresponding borehole based on electromagnetic wave energy loss.

[0006] Furthermore, the first acquisition module includes a first determination submodule, a second determination submodule and a third determination submodule; the first determination submodule is used to determine the distance of the electromagnetic wave receiver from the ground based on the exposed surface and the depth of the electromagnetic wave receiver in the borehole; the second determination submodule is used to determine the preset time interval based on the speed at which the electromagnetic wave receiver penetrates into the borehole; the third determination submodule is used to record the depth information of at least one electromagnetic wave receiver based on the preset time interval.

[0007] Furthermore, the second acquisition module includes an adjustment submodule, a transmission submodule, a fourth determination submodule and a fifth determination submodule; the adjustment submodule is used to adjust the output power and transmission direction of the electromagnetic wave transmitter based on the position data; the transmission submodule is used to send electromagnetic wave signals to the electromagnetic wave receiver at the corresponding position based on the output power and the transmission direction; the fourth determination submodule is used to determine the electrical parameters of the coal seam at the current position, and the electrical parameters of the coal seam include dielectric constant and resistivity; the fifth determination submodule is used to determine the preset electromagnetic wave attenuation coefficient at the current position based on the dielectric constant and resistivity at the current position.

[0008] Further, the first determination module includes a drawing submodule, a sixth determination submodule and a seventh determination submodule; the drawing submodule is used to draw the corresponding amplitude-hole depth curve and energy-time curve based on the electromagnetic wave signal in the process from the exposed surface to the current position; the sixth determination submodule is used to calculate the amplitude-hole depth curve and the energy-time curve based on a preset electromagnetic wave attenuation coefficient to determine the energy loss and loss rate of the current electromagnetic wave signal in the process from the exposed surface to the current position; the seventh determination submodule is used to determine the electromagnetic wave energy loss at the current position based on the energy loss and the loss rate; The second determination module includes an eighth determination submodule and a ninth determination submodule. The eighth determination submodule is used to determine the energy attenuation rate based on the comparison between the electromagnetic wave energy loss and the preset energy loss result; the ninth determination submodule is used to determine the crack density data in the corresponding borehole based on the energy attenuation rate.

[0009] An analysis system based on the above-mentioned electromagnetic wave-based gas extraction drilling crack analysis device comprises the above-mentioned electromagnetic wave-based gas extraction drilling crack analysis device, a server and drilling equipment, wherein the crack analysis device is connected to the server, and the server is connected to the drilling equipment.

[0010] A gas extraction borehole crack analysis method based on electromagnetic waves, based on the above-mentioned gas extraction borehole crack analysis system based on electromagnetic waves, is characterized by comprising the following contents: S1. In a first borehole, obtaining position data of an electromagnetic wave receiver at a current position; S2. Based on the above position data, a corresponding electromagnetic wave transmitter is arranged in the second borehole, so that the electromagnetic wave transmitter can send at least one electromagnetic wave signal according to the position data; S3, calculating at least one electromagnetic wave signal based on a preset electromagnetic wave attenuation coefficient to determine the electromagnetic wave energy loss at the current position; S4. Based on the electromagnetic wave energy loss, determine the crack density data in the corresponding borehole.

[0011] Further, in step S1, the position data includes depth information. In the first borehole, the position data of the electromagnetic wave receiver at the current position is obtained. The position data includes: Taking the exposed surface as a reference, determining the distance of the electromagnetic wave receiver from the exposed surface according to the depth of the electromagnetic wave receiver penetrating into the borehole; Determine a preset time interval according to the speed at which the electromagnetic wave receiver penetrates into the borehole; Based on the preset time interval, recording the depth information of at least one electromagnetic wave receiver; In step S2, based on the position data, a corresponding electromagnetic wave transmitter is arranged in the second borehole so that the electromagnetic wave transmitter can send an electromagnetic wave signal according to the position data, including: Based on the position data, adjusting the output power and transmission direction of the electromagnetic wave transmitter; Based on the output power and the transmission direction, an electromagnetic wave signal is sent to the electromagnetic wave receiver at the corresponding position.

[0012] Furthermore, in step S3, before determining the electromagnetic wave energy loss at the current position based on the preset electromagnetic wave attenuation coefficient, the method further includes: Determine electrical parameters of the coal seam at the current position, wherein the electrical parameters of the coal seam include dielectric constant and resistivity; Based on the dielectric constant and resistivity at the current position, determine a preset electromagnetic wave attenuation coefficient at the current position; Calculating at least one electromagnetic wave signal based on a preset electromagnetic wave attenuation coefficient to determine the electromagnetic wave energy loss at the current position includes: Based on the electromagnetic wave signal from the exposed surface to the current position, draw the corresponding amplitude-hole depth curve and energy-time curve; The amplitude-hole depth curve and the energy-time curve are calculated based on the above-mentioned preset electromagnetic wave attenuation coefficient to determine the energy loss and loss rate of the current electromagnetic wave signal from the exposed surface to the current position; Based on the above energy loss and loss rate, the electromagnetic wave energy loss at the current position is determined.

[0013] Further, in step S4, based on the electromagnetic wave energy loss, crack density data in the corresponding borehole is determined, including: Determine the energy attenuation rate based on the comparison between the electromagnetic wave energy loss and the preset energy loss result; Based on the energy decay rate, the crack density data in the corresponding borehole is determined.

[0014] An electronic device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, any step of the above-mentioned electromagnetic wave-based gas extraction borehole crack analysis method is implemented.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a gas extraction borehole crack analysis device, system and method based on electromagnetic waves. The crack analysis device comprises a transmitting rod arranged in a first borehole and a receiving rod arranged in a second borehole. In the first borehole, position data of an electromagnetic wave receiver at a current position is obtained; based on the above position data, a corresponding electromagnetic wave transmitter is arranged in the second borehole, so that the electromagnetic wave transmitter can send at least one electromagnetic wave signal according to the position data; based on a preset electromagnetic wave attenuation coefficient, at least one electromagnetic wave signal is calculated to determine the electromagnetic wave energy loss at the current position; based on the electromagnetic wave energy loss, crack density data in the corresponding borehole is determined; the present invention determines the energy loss of the electromagnetic wave signal at different depths and coal seam geological conditions in real time through the electromagnetic wave attenuation coefficient of the current coal seam, accurately reflects the distribution characteristics of the coal seam geological cracks at the current position, improves the crack density detection accuracy, and ensures the safety during exploration and excavation and collection work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the crack analysis device of Example 1 of the present invention.

[0017] Figure 2 FIG. 4 is a schematic diagram of the crack analysis system of the present invention.

[0018] Figure 3 It is a schematic diagram of the process of the crack analysis method of the present invention.

[0019] Figure 4 This is a diagram of the lateral energy loss of the attenuated electromagnetic wave signal received by the electromagnetic wave receiver of the present invention at different positions.

[0020] Figure 5 It is a position information parameter diagram of the electromagnetic wave receiver and the electromagnetic wave transmitter of the present invention.

[0021] Figure 6 It is a schematic structural diagram of a crack analysis device according to Example 2 of the present invention.

[0022] Figure 7 It is a schematic diagram of the specific arrangement of the electromagnetic wave receiver and the electromagnetic wave transmitter of the present invention.

[0023] Figure 8 It is a schematic structural diagram of the electronic device of the present invention.

[0024] in: Crack analysis device 100, intelligent terminal 101, data collector 102, first optical fiber capstan 103, second optical fiber capstan 104, transmitting rod 105, receiving rod 106, first borehole 107, second borehole 108, electromagnetic wave transmitter 109, electromagnetic wave receiver 110, first acquisition module 111, second acquisition module 112, first determination module 113, second determination module 114, server 200, drilling equipment 300, processor 401, memory 402. DETAILED DESCRIPTION

[0025] In order to better understand the technical solution of the present invention, the following will be described in detail in conjunction with the relevant illustrations. It should be understood that the following specific embodiments are not intended to limit the specific implementation of the technical solution of the present invention, and are only implementations that can be adopted by the technical solution of the present invention. It should be noted that the description of the positional relationship of each component in this article, such as component A being located above component B, is based on the description of the relative positions of the components in the illustration, and is not intended to limit the actual positional relationship of the components. Example 1

[0026] See also Figure 1-Figure 5 , Figure 1 A structural schematic diagram of the crack analysis device of Example 1 is drawn. As shown in the figure, a gas extraction borehole crack analysis device based on electromagnetic waves in this Example 1, namely, a crack analysis device 100, is arranged in a formation of a gas extraction borehole, wherein at least two boreholes are extracted and drilled in the formation: a first borehole and a second borehole, and includes a first acquisition module 111, a second acquisition module 112, a first determination module 113, and a second determination module 114; A first acquisition module 111 is used to acquire position data of an electromagnetic wave receiver at a current position in a first borehole; A second acquisition module 112 is used to set a corresponding electromagnetic wave transmitter in the second borehole based on the position data, so that the electromagnetic wave transmitter can send at least one electromagnetic wave signal according to the position data; A first determination module 113, configured to calculate at least one electromagnetic wave signal based on a preset electromagnetic wave attenuation coefficient to determine the electromagnetic wave energy loss at the current position; The second determination module 114 is used to determine crack density data in the corresponding borehole based on the electromagnetic wave energy loss.

[0027] In this embodiment, the first acquisition module 111 includes: The first determination submodule is used to determine the distance of the electromagnetic wave receiver from the ground according to the depth of the electromagnetic wave receiver into the borehole based on the exposed surface; The second determination submodule is used to determine the preset time interval according to the speed at which the electromagnetic wave receiver penetrates into the borehole; The third determining submodule is used to record the depth information of at least one electromagnetic wave receiver based on a preset time interval.

[0028] In this embodiment, the second acquisition module 112 includes: An adjustment submodule, used to adjust the output power and transmission direction of the electromagnetic wave transmitter based on the position data; The transmitting submodule is used to send electromagnetic wave signals to electromagnetic wave receivers at corresponding positions based on output power and transmitting direction.

[0029] In this embodiment, the second acquisition module 112 further includes: The fourth determination submodule is used to determine the electrical parameters of the coal seam at the current position, wherein the electrical parameters of the coal seam include dielectric constant and resistivity; The fifth determination submodule is used to determine a preset electromagnetic wave attenuation coefficient at the current position based on the dielectric constant and resistivity at the current position.

[0030] In this embodiment, the first determining module 113 includes: A drawing submodule is used to draw the corresponding amplitude-hole depth curve and energy-time curve based on the electromagnetic wave signal in the process from the exposed surface to the current position; A sixth determination submodule is used to calculate the amplitude-hole depth curve and the energy-time curve based on a preset electromagnetic wave attenuation coefficient to determine the energy loss and loss rate of the current electromagnetic wave signal in the process from the exposed surface to the current position; The seventh determination submodule is used to determine the electromagnetic wave energy loss at the current position based on the energy loss and the loss rate.

[0031] In this embodiment, the second determining module 114 includes: an eighth determination submodule, configured to determine an energy attenuation rate based on a comparison between the electromagnetic wave energy loss and a preset energy loss result; The ninth determination submodule is used to determine crack density data in the corresponding borehole based on the energy decay rate.

[0032] Specifically, the first borehole can be used to set an electromagnetic wave receiver, and the second borehole can be used to set an electromagnetic wave transmitter. Generally speaking, the electromagnetic wave transmitter can send signals to the electromagnetic wave receiver set at any position in the first borehole, so as to analyze the crack density according to the attenuation of the electromagnetic wave.

[0033] The above-mentioned position data may refer to the specific position information of the electromagnetic wave receiver in the underground borehole. Specifically, the above-mentioned position data may include but is not limited to the depth information of the electromagnetic wave receiver, the relative distance from the exposed surface, the speed at which the electromagnetic wave receiver enters the borehole and other data; the position data ensures the basis for adjusting the electromagnetic wave transmitter in the second borehole.

[0034] The above-mentioned preset electromagnetic wave attenuation coefficient is used to calculate the energy loss of electromagnetic waves when propagating in a specific medium. The energy loss can be determined by the physical and electrical properties of the medium (such as conductivity, dielectric constant and magnetic permeability), which affects the rate and range of electromagnetic wave propagation in the medium. By measuring the attenuation of the electromagnetic wave signal, the crack density and other coal seam geological characteristics can be estimated.

[0035] The above-mentioned preset electromagnetic wave attenuation coefficient α can be determined by the following formula: ; in, , The resistivity of the medium can be obtained through laboratory coal seam electrical parameter test experiments; is the dielectric constant of the medium, obtained through testing; μ is the magnetic permeability of the medium, which is 4×10-7H / m; f is the frequency of the electromagnetic wave; c is the speed of light (about 3×108m / s). Through the above formula, the electromagnetic wave attenuation coefficient under the current geological characteristics of the coal seam can be calculated.

[0036] The calculation process of the electromagnetic wave energy loss can be performed by calculating the theoretical energy loss of the electromagnetic wave penetrating the coal seam geology through the preset electromagnetic wave attenuation coefficient. Specifically, it can be determined by the following formula: ; ; ; Among them, I0 is the original electromagnetic wave field strength, D1 is the theoretically calculated shortest distance between the electromagnetic wave transmitter and the electromagnetic wave receiver, E is the electromagnetic wave energy received by the electromagnetic wave receiver, E0 is the energy of the original electromagnetic wave emitted by the electromagnetic wave transmitter, V is the energy attenuation rate, ΔE is the energy lost in the electromagnetic wave propagation process, and Δt is the time consumed by the electromagnetic wave propagation process.

[0037] It is understandable that the above-mentioned electromagnetic wave energy loss, preset electromagnetic wave attenuation coefficient and calculation process can be determined according to the setting position of the electromagnetic wave receiver and the electromagnetic wave signal transmitted by the electromagnetic wave transmitter to the electromagnetic wave receiver at a certain position.

[0038] The above crack density data can be obtained by analyzing the electromagnetic wave signal to obtain information about the distribution and density of cracks in a specific area or volume, or according to the geological characteristics of the coal seam at the corresponding positions of the electromagnetic wave receiver and the electromagnetic wave transmitter.

[0039] In a possible embodiment, the electromagnetic wave-based gas extraction borehole crack analysis system receives an electromagnetic wave signal emitted by an electromagnetic wave transmitter correspondingly arranged in a second borehole according to an electromagnetic wave receiver arranged in a first borehole, analyzes and calculates the electromagnetic wave signal, and determines the circumferential crack density of the borehole at the corresponding position.

[0040] See also Figure 2 , Figure 2 A structural schematic diagram of the crack analysis system of Example 1 is drawn. As shown in the figure, a gas extraction drilling crack analysis system based on electromagnetic waves of this Example 1 includes a crack analysis device 100, a server 200 and a drilling device 300, wherein the crack analysis device 100 is connected to the server 200, and the server 200 is connected to the drilling device 300.

[0041] See also Figure 3 , Figure 3 A flow chart of the crack analysis method of Example 1 is drawn. As shown in the figure, a gas extraction borehole crack analysis method based on electromagnetic waves in Example 1 is based on the above-mentioned gas extraction borehole crack analysis device and system based on electromagnetic waves, and includes the following contents: S1. In a first borehole, obtaining position data of an electromagnetic wave receiver at a current position; The above-mentioned electromagnetic wave-based gas extraction borehole crack analysis system has the functions of crack feature data processing, crack feature data transmission and reception, and crack feature data memory storage, and can be constructed based on a server or a server cluster. The above-mentioned server or server cluster can be an electronic device with crack feature data processing capability; The first borehole can be used to set an electromagnetic wave receiver, and the second borehole can be used to set an electromagnetic wave transmitter. Generally speaking, the electromagnetic wave transmitter can send a signal to an electromagnetic wave receiver set at any position in the first borehole, so as to analyze the crack density according to the attenuation of the electromagnetic wave. The above-mentioned position data may refer to the specific position information of the electromagnetic wave receiver in the underground borehole. Specifically, the above-mentioned position data may include but is not limited to the depth information of the electromagnetic wave receiver, the relative distance from the exposed surface, the speed at which the electromagnetic wave receiver enters the borehole and other data; the position data ensures the basis for adjusting the electromagnetic wave transmitter in the second borehole.

[0042] In a possible embodiment, the above-mentioned electromagnetic wave-based gas extraction borehole crack analysis system obtains precise location data, including depth and distance relative to the exposed surface, by placing an electromagnetic wave receiver in the first borehole, and then analyzes it and adjusts the transmission direction and frequency of the electromagnetic wave transmitter in the second borehole to improve the accuracy and efficiency of underground crack density measurement; it can be understood that in order to improve accuracy, when the electromagnetic wave receiver is set in the first borehole, it can be set close to the borehole wall.

[0043] S2. Based on the position data, a corresponding electromagnetic wave transmitter is arranged in the second borehole, so that the electromagnetic wave transmitter can send at least one electromagnetic wave signal according to the position data; In a possible embodiment, the above-mentioned electromagnetic wave-based gas extraction drilling crack analysis system accurately sets an electromagnetic wave transmitter in the second borehole according to the position data obtained from the first borehole, so that it can send targeted electromagnetic wave signals, thereby effectively improving the detection accuracy of underground crack density and significantly enhancing the efficiency and accuracy of coal seam geological structure analysis.

[0044] S3, calculating at least one electromagnetic wave signal based on a preset electromagnetic wave attenuation coefficient to determine the electromagnetic wave energy loss at the current position; In this embodiment, the above-mentioned preset electromagnetic wave attenuation coefficient is used to calculate the energy loss of electromagnetic waves when propagating in a specific medium. The energy loss can be determined by the physical and electrical properties of the medium (such as conductivity, dielectric constant and magnetic permeability), which affects the rate and range of electromagnetic wave propagation in the medium. By measuring the attenuation of the electromagnetic wave signal, the crack density and other coal seam geological characteristics can be estimated.

[0045] The above-mentioned preset electromagnetic wave attenuation coefficient α can be determined by the following formula: ; in, , The resistivity of the medium can be obtained through laboratory coal seam electrical parameter test experiments; is the dielectric constant of the medium, obtained through testing; μ is the magnetic permeability of the medium, which is 4×10-7H / m; f is the frequency of the electromagnetic wave; c is the speed of light (about 3×108m / s). Through the above formula, the electromagnetic wave attenuation coefficient under the current geological characteristics of the coal seam can be calculated.

[0046] The calculation process of the electromagnetic wave energy loss can be performed by calculating the theoretical energy loss of the electromagnetic wave penetrating the coal seam through the preset electromagnetic wave attenuation coefficient. Specifically, it can be determined by the following formula: ; ; ; Among them, I0 is the original electromagnetic wave field strength, D1 is the theoretically calculated shortest distance between the electromagnetic wave transmitter and the electromagnetic wave receiver, E is the electromagnetic wave energy received by the electromagnetic wave receiver, E0 is the energy of the original electromagnetic wave emitted by the electromagnetic wave transmitter, V is the energy attenuation rate, ΔE is the energy lost in the electromagnetic wave propagation process, and Δt is the time consumed by the electromagnetic wave propagation process.

[0047] S4. Determine crack density data in the corresponding borehole based on electromagnetic wave energy loss; The above crack density data is obtained by analyzing the electromagnetic wave signal, which contains the attenuation process data of the electromagnetic wave under the current coal seam geological characteristics, such as the attenuation rate and the corresponding attenuation energy, etc., to obtain information about the distribution and density of geological features in a specific area or volume, or at the corresponding positions of the electromagnetic wave receiver and the electromagnetic wave transmitter.

[0048] In this embodiment, in the first borehole, the position data of the electromagnetic wave receiver at the current position is obtained; based on the position data, a corresponding electromagnetic wave transmitter is set in the second borehole so that the electromagnetic wave transmitter can send at least one electromagnetic wave signal according to the position data; based on the preset electromagnetic wave attenuation coefficient, at least one electromagnetic wave signal is calculated to determine the electromagnetic wave energy loss at the current position; based on the electromagnetic wave energy loss, the crack density data in the corresponding borehole is determined. The energy loss of the electromagnetic wave signal at different depths and coal seam geological conditions is determined in real time through the electromagnetic wave attenuation coefficient of the current coal seam, which accurately reflects the geological crack distribution characteristics at the current position, improves the crack density detection accuracy, and ensures the safety of exploration and excavation collection work.

[0049] Optionally, when the position data includes depth information, in the step of obtaining the position data of the electromagnetic wave receiver at the current position in the first borehole, the exposed surface can be used as a reference to determine the distance of the electromagnetic wave receiver from the ground according to the depth of the electromagnetic wave receiver penetrating into the borehole; a preset time interval can be determined according to the speed at which the electromagnetic wave receiver penetrates into the borehole; and based on the preset time interval, the depth information of at least one electromagnetic wave receiver can be recorded.

[0050] In this embodiment, the preset time interval can correspond to the time set for recording the depth of the electromagnetic wave receiver according to the speed (generally uniform) at which the electromagnetic wave receiver penetrates into the borehole.

[0051] In a possible embodiment, the above-mentioned electromagnetic wave-based gas extraction drilling crack analysis system can set corresponding time intervals according to the speed of the electromagnetic wave receiver during the process of drilling deep into the hole, confirm the positions of the electromagnetic wave receivers at multiple different positions according to the time intervals, and set corresponding multiple electromagnetic wave receivers according to the positions, thereby achieving the purpose of receiving electromagnetic wave signals emitted by corresponding electromagnetic wave transmitters at different positions.

[0052] Optionally, based on the position data, a corresponding electromagnetic wave transmitter is set in the second borehole so that the electromagnetic wave transmitter can send an electromagnetic wave signal according to the position data. The step also includes adjusting the output power and transmission direction of the electromagnetic wave transmitter based on the position data; and sending the electromagnetic wave signal to the electromagnetic wave receiver at the corresponding position based on the output power and the transmission direction.

[0053] In this embodiment, the above-mentioned electromagnetic wave-based gas extraction drilling crack analysis system can calculate the shortest straight-line distance to the electromagnetic transmitter in the corresponding second borehole according to the position data of the electromagnetic wave receiver, including depth and relative position information, and adjust the output power and emission angle of the electromagnetic wave transmitter in real time according to the shortest straight-line distance, thereby ensuring that the electromagnetic wave can effectively cover the position of the electromagnetic wave receiver, while optimizing the energy distribution to avoid unnecessary energy loss.

[0054] In a possible embodiment, the above-mentioned electromagnetic wave-based gas extraction drilling crack analysis system can also perform preliminary analysis on the electromagnetic properties of the underground medium, including the dielectric constant and conductivity, to predict the propagation path and attenuation mode of the electromagnetic wave in the medium, and adjust the direction of the electromagnetic wave transmitter accordingly, so that the emitted electromagnetic wave can penetrate to the location of the electromagnetic wave receiver in the most direct path, while reducing scattering and reflection caused by medium heterogeneity.

[0055] Optionally, the step before determining the electromagnetic wave energy loss at the current position based on the preset electromagnetic wave attenuation coefficient also includes determining the electrical parameters of the coal seam at the current position; and determining the preset electromagnetic wave attenuation coefficient at the current position based on the dielectric constant and resistivity at the current position.

[0056] In this embodiment, the electrical parameters of the coal seam may include but are not limited to dielectric constant and resistivity. It is understandable that under the same coal seam geological conditions, the medium at different coal seam geological depths may have certain differences in the propagation of electromagnetic waves. Therefore, the electrical parameters of the coal seam of the medium at the current coal seam geological depth can be confirmed to ensure that the electromagnetic wave can be emitted along the optimal propagation path of the electromagnetic wave.

[0057] The preset electromagnetic wave attenuation coefficient at the current position can more effectively guide the setting and adjustment of the electromagnetic wave transmitter at the current depth position, making the underground structure detection more accurate.

[0058] For details, see Figure 4 and Figure 5 , where the attenuated electromagnetic wave signals transmitted by the same electromagnetic wave receiver to different locations are different. Figure 4 Comparison of transverse energy loss parameters and Figure 5 It can be seen from the location information parameter diagram provided in that for the data of the same transmitting location, if , it can be determined that the depth of the shortest distance position XH2 between the electromagnetic wave transmitter and the electromagnetic wave receiver is greater than X1.

[0059] According to the energy-time curve, the average decay rate V is obtained. ,and , prove H1, H2, X H1 , X H2 The coal seam fissures between adjacent boreholes corresponding to the formed rectangle are more abundant, and the corresponding areas should strengthen the fissure blocking measures. H1 , X H2 is the shortest distance position on the corresponding electromagnetic wave transmitting rod.

[0060] Optionally, in the step of calculating at least one electromagnetic wave signal based on a preset electromagnetic wave attenuation coefficient to determine the electromagnetic wave energy loss at the current position, it also includes drawing a corresponding amplitude-hole depth curve and energy-time curve based on the electromagnetic wave signal of the current electromagnetic wave signal in the process from the exposed surface to the current position; calculating the amplitude-hole depth curve and the energy-time curve based on the preset electromagnetic wave attenuation coefficient to determine the energy loss and loss rate of the current electromagnetic wave signal in the process from the exposed surface to the current position; and determining the electromagnetic wave energy loss at the current position based on the energy loss and the loss rate.

[0061] In this embodiment, the amplitude-hole depth curve and the energy-time curve can be drawn by using data drawing software such as Matlab 2024b, based on analyzing the electromagnetic wave signal.

[0062] Specifically, the above-mentioned amplitude-hole depth curve can be generated by placing an electromagnetic wave transmitter at a certain borehole depth and sending electromagnetic waves to the formation, and then the receiver in the same borehole or adjacent borehole records the response of these waves. It can be used to represent the amplitude change of the electromagnetic wave signal at different depths in the borehole. Since cracks or voids will affect the propagation of electromagnetic waves and cause changes in amplitude, the location of the sudden change in electromagnetic wave amplitude can be identified to analyze the possible corresponding crack characteristics or other coal seam geological anomalies.

[0063] The above energy-time curve is used to show the energy loss of electromagnetic wave signals over time. In this embodiment, it is mainly used to analyze the energy attenuation of electromagnetic waves when they propagate in different underground structures and pass through different media. Since different underground structures and media will affect the propagation path and intensity of electromagnetic waves, sudden energy attenuation or changes can be identified to indicate crack characteristics or the presence of voids.

[0064] The above loss rate can be the speed at which the electromagnetic wave signal consumes energy during the process from transmission to reception. Generally speaking, it can be obtained according to the following formula: ; Among them, E t1 and E t2 It is the electromagnetic wave energy measured at two different time points t1 and t2.

[0065] Optionally, in the step of determining the crack density data in the corresponding borehole based on the electromagnetic wave energy loss, it also includes determining the energy attenuation rate based on comparing the electromagnetic wave energy loss with the preset energy loss result; and determining the crack density data in the corresponding borehole based on the energy attenuation rate.

[0066] In this embodiment, the above-mentioned preset energy loss result can be the expected energy loss of electromagnetic waves in a specific medium calculated in advance based on the expected geological characteristics of the coal seam and the electromagnetic wave propagation theory. Specifically, it can be calculated by analyzing the electrical parameters of the formation (such as dielectric constant, resistivity, magnetic permeability, etc.) and combining the frequency of the electromagnetic wave, propagation distance and other relevant factors.

[0067] The energy decay rate mentioned above may be an energy decay process caused by the influence of different media on the propagation of electromagnetic waves, which is different from the energy decay process caused by the influence of energy over time according to the loss rate mentioned above.

[0068] In a possible embodiment, the above-mentioned electromagnetic wave-based gas extraction borehole crack analysis system analyzes the current coal seam geology to determine the corresponding conductivity parameters, and calculates the preset energy loss results under the current environment, and compares it with the actual measured electromagnetic wave energy loss to calculate the corresponding energy decay rate, and compares the energy decay rate with the predicted energy decay rate in different media to determine the crack density data in the corresponding borehole.

[0069] Example 2 See also Figure 6-7 , Figure 6 A structural schematic diagram of the crack analysis device of Example 2 is drawn. As shown in the figure, a gas extraction borehole crack analysis device based on electromagnetic waves of this Example 2, namely, a crack analysis device 100, is arranged in a stratum of a gas extraction borehole, in which at least two boreholes are extracted and drilled: a first borehole 107 and a second borehole 108, a transmitting rod 105 is arranged in the second borehole 108, a receiving rod 106 is arranged in the first borehole 107, an electromagnetic wave transmitter 109 is arranged at the rod head of the transmitting rod 105, and a plurality of electromagnetic wave receivers 110 distributed equidistantly are arranged on the receiving rod 106.

[0070] The transmitting rod 105 is connected to the first optical fiber capstan 103 via an optical fiber, and the first optical fiber capstan 103 is supported and fixed by a fixed bracket, and the receiving rod 106 is connected to the second optical fiber capstan 104 via an optical fiber; the first optical fiber capstan 103 and the second optical fiber capstan 104 are respectively connected to the data collector 102 via transmission cables, and the data collector 102 is connected to the intelligent terminal 101 via a USB transmission line.

[0071] It is understandable that the above-mentioned position data and the content of the electromagnetic wave signal can be analyzed by connecting the data collector 102 in the crack analysis device 100 with the transmitting rod 105 and the receiving rod 106, and then performing data analysis through the smart terminal 101 to analyze the crack density.

[0072] For details, see Figure 7 ,in, Figure 7 The multiple electromagnetic wave receivers H1, H2, H3, H4, H5, and H6 are distributed on the receiving rod 106, and the real-time position of X1 can be continuously obtained according to the electromagnetic wave transmitter X1 set on the transmitting rod 105 during the process of going deeper into the ground, thereby updating the corresponding position information of X2.

[0073] See also Figure 8 , Figure 8A structural schematic diagram of the electronic device of the present invention is drawn. As shown in the figure, an electronic device based on the above-mentioned electromagnetic wave-based gas extraction borehole crack analysis system involved in this embodiment 2 includes a processor 401 and a memory 402, and a computer program for executing the electromagnetic wave-based gas extraction borehole crack analysis method stored in the memory 402 and capable of running on the processor 401. The processor 401 runs the computer program for the electromagnetic wave-based gas extraction borehole crack analysis method stored in the memory 402 and performs the following steps: In the first borehole, obtaining position data of an electromagnetic wave receiver at a current position; Based on the above position data, a corresponding electromagnetic wave transmitter is arranged in the second borehole, so that the electromagnetic wave transmitter can send at least one electromagnetic wave signal according to the position data; Calculating at least one electromagnetic wave signal based on a preset electromagnetic wave attenuation coefficient to determine the electromagnetic wave energy loss at the current position; Based on the above electromagnetic wave energy loss, the crack density data in the corresponding borehole is determined.

[0074] Optionally, the position data executed by the processor 401 includes depth information, and in the first borehole, obtaining the position data of the electromagnetic wave receiver at the current position includes: Taking the exposed surface as a reference and the depth of the electromagnetic wave receiver into the borehole, the distance of the electromagnetic wave receiver from the ground is determined; Determine a preset time interval according to the speed at which the electromagnetic wave receiver penetrates into the borehole; Based on the preset time interval, the depth information of at least one electromagnetic wave receiver is recorded.

[0075] Optionally, the processor 401 sets a corresponding electromagnetic wave transmitter in the second borehole based on the position data, so that the electromagnetic wave transmitter can send an electromagnetic wave signal according to the position data, including: Based on the position data, adjust the output power and transmission direction of the electromagnetic wave transmitter; Based on the output power and the transmission direction, an electromagnetic wave signal is sent to the electromagnetic wave receiver at the corresponding position.

[0076] Optionally, before the processor 401 determines the electromagnetic wave energy loss at the current position based on the preset electromagnetic wave attenuation coefficient, the method further includes: Determine electrical parameters of the coal seam at the current position, wherein the electrical parameters of the coal seam include dielectric constant and resistivity; Based on the dielectric constant and resistivity at the current position, a preset electromagnetic wave attenuation coefficient at the current position is determined.

[0077] Optionally, the processor 401 calculates at least one electromagnetic wave signal based on a preset electromagnetic wave attenuation coefficient to determine the electromagnetic wave energy loss at the current position, including: Based on the electromagnetic wave signal from the exposed surface to the current position, draw the corresponding amplitude-hole depth curve and energy-time curve; The amplitude-hole depth curve and the energy-time curve are calculated based on the preset electromagnetic wave attenuation coefficient to determine the energy loss and loss rate of the current electromagnetic wave signal from the exposed surface to the current position; Based on the above energy loss and loss rate, the electromagnetic wave energy loss at the current position is determined.

[0078] Optionally, the processor 401 further executes the method of determining crack density data of hole walls of adjacent boreholes based on the electromagnetic wave energy loss, including: Determine the energy attenuation rate based on the comparison between the electromagnetic wave energy loss and the preset energy loss result; Based on the energy decay rate, the crack density data in the corresponding borehole is determined.

[0079] The present embodiment also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the various processes of the electromagnetic wave-based gas extraction drilling crack analysis method or the electromagnetic wave-based gas extraction drilling crack analysis method at the application end provided in the present embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0080] Those skilled in the art can understand that the implementation of all or part of the processes in the above-mentioned embodiments can be completed by instructing the relevant hardware through a computer program, and can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM).

[0081] The above are only specific application examples of the present invention and do not constitute any limitation on the protection scope of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the present invention.

Claims

1. A gas extraction borehole crack analysis device based on electromagnetic waves, arranged in a gas extraction borehole formation, wherein at least two boreholes are extracted and drilled in the formation: a first borehole and a second borehole, characterized in that: The crack analysis device comprises: A first acquisition module is disposed in the first borehole to acquire position data of an electromagnetic wave receiver at a current position; A second acquisition module is disposed in the second borehole, and based on the position data, a corresponding electromagnetic wave transmitter is disposed in the second borehole, so that the electromagnetic wave transmitter can send at least one electromagnetic wave signal according to the position data; A first determination module calculates at least one electromagnetic wave signal based on a preset electromagnetic wave attenuation coefficient to determine the electromagnetic wave energy loss at the current position; The second determination module determines crack density data in the corresponding borehole based on electromagnetic wave energy loss.

2. According to claim 1, a gas extraction borehole crack analysis device, system and method based on electromagnetic waves are characterized by: The first acquisition module includes a first determination submodule, a second determination submodule and a third determination submodule; The first determination submodule is used to determine the distance of the electromagnetic wave receiver from the ground according to the depth of the electromagnetic wave receiver into the borehole based on the exposed surface; The second determination submodule is used to determine the preset time interval according to the speed at which the electromagnetic wave receiver penetrates into the borehole; The third determining submodule is used to record the depth information of at least one electromagnetic wave receiver based on a preset time interval.

3. The electromagnetic wave-based gas extraction borehole crack analysis device, system and method according to claim 1, characterized in that: The second acquisition module includes an adjustment submodule, a transmission submodule, a fourth determination submodule and a fifth determination submodule; the adjustment submodule is used to adjust the output power and transmission direction of the electromagnetic wave transmitter based on the position data; The transmitting submodule is used to send electromagnetic wave signals to electromagnetic wave receivers at corresponding positions based on output power and transmission direction; The fourth determination submodule is used to determine the electrical parameters of the coal seam at the current position, wherein the electrical parameters of the coal seam include dielectric constant and resistivity; The fifth determination submodule is used to determine a preset electromagnetic wave attenuation coefficient at the current position based on the dielectric constant and resistivity at the current position.

4. The electromagnetic wave-based gas extraction borehole crack analysis device, system and method according to claim 1, characterized in that: The first determination module includes a drawing submodule, a sixth determination submodule and a seventh determination submodule; A drawing submodule is used to draw the corresponding amplitude-hole depth curve and energy-time curve based on the electromagnetic wave signal in the process from the exposed surface to the current position; A sixth determination submodule is used to calculate the amplitude-hole depth curve and the energy-time curve based on a preset electromagnetic wave attenuation coefficient to determine the energy loss and loss rate of the current electromagnetic wave signal in the process from the exposed surface to the current position; A seventh determination submodule, configured to determine the electromagnetic wave energy loss at the current position based on the energy loss and the loss rate; The second determination module includes an eighth determination submodule and a ninth determination submodule, the eighth determination submodule being used to determine the energy attenuation rate based on the comparison between the electromagnetic wave energy loss and the preset energy loss result; The ninth determination submodule is used to determine crack density data in the corresponding borehole based on the energy decay rate.

5. An analysis system based on the electromagnetic wave-based gas extraction borehole crack analysis device according to claim 1, characterized in that: It comprises the above-mentioned electromagnetic wave-based gas extraction drilling crack analysis device, a server and drilling equipment, wherein the crack analysis device is connected to the server, and the server is connected to the drilling equipment.

6. A method for analyzing cracks in gas extraction boreholes based on electromagnetic waves, based on the system for analyzing cracks in gas extraction boreholes based on electromagnetic waves according to claim 5, characterized in that: Includes the following: S1. In a first borehole, obtaining position data of an electromagnetic wave receiver at a current position; S2. Based on the above position data, a corresponding electromagnetic wave transmitter is arranged in the second borehole, so that the electromagnetic wave transmitter can send at least one electromagnetic wave signal according to the position data; S3, calculating at least one electromagnetic wave signal based on a preset electromagnetic wave attenuation coefficient to determine the electromagnetic wave energy loss at the current position; S4. Based on the electromagnetic wave energy loss, determine the crack density data in the corresponding borehole.

7. The method for analyzing cracks in gas extraction boreholes based on electromagnetic waves according to claim 6, characterized in that: In step S1, the position data includes depth information. In the first borehole, the position data of the electromagnetic wave receiver at the current position is obtained. The position data includes: Taking the exposed surface as a reference, determining the distance of the electromagnetic wave receiver from the exposed surface according to the depth of the electromagnetic wave receiver penetrating into the borehole; Determine a preset time interval according to the speed at which the electromagnetic wave receiver penetrates into the borehole; Based on the preset time interval, recording the depth information of at least one electromagnetic wave receiver; In step S2, based on the position data, a corresponding electromagnetic wave transmitter is arranged in the second borehole so that the electromagnetic wave transmitter can send an electromagnetic wave signal according to the position data, including: Based on the position data, adjusting the output power and transmission direction of the electromagnetic wave transmitter; Based on the output power and the transmission direction, an electromagnetic wave signal is sent to the electromagnetic wave receiver at the corresponding position.

8. The method for analyzing cracks in gas extraction boreholes based on electromagnetic waves according to claim 6, characterized in that: In step S3, before determining the electromagnetic wave energy loss at the current position based on the preset electromagnetic wave attenuation coefficient, the method further includes: Determine electrical parameters of the coal seam at the current position, wherein the electrical parameters of the coal seam include dielectric constant and resistivity; Based on the dielectric constant and resistivity at the current position, determine a preset electromagnetic wave attenuation coefficient at the current position; Calculating at least one electromagnetic wave signal based on a preset electromagnetic wave attenuation coefficient to determine the electromagnetic wave energy loss at the current position includes: Based on the electromagnetic wave signal from the exposed surface to the current position, draw the corresponding amplitude-hole depth curve and energy-time curve; The amplitude-hole depth curve and the energy-time curve are calculated based on the above-mentioned preset electromagnetic wave attenuation coefficient to determine the energy loss and loss rate of the current electromagnetic wave signal from the exposed surface to the current position; Based on the above energy loss and loss rate, the electromagnetic wave energy loss at the current position is determined.

9. The method for analyzing cracks in gas extraction boreholes based on electromagnetic waves according to claim 6, characterized in that: In step S4, based on the electromagnetic wave energy loss, crack density data in the corresponding borehole is determined, including: Determine the energy attenuation rate based on the comparison between the electromagnetic wave energy loss and the preset energy loss result; Based on the energy decay rate, the crack density data in the corresponding borehole is determined.

10. An electronic device, based on the electromagnetic wave-based gas extraction borehole crack analysis method according to any one of claims 6 to 9, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps in the electromagnetic wave-based gas extraction drilling crack analysis method as described in any one of claims 6 to 9 are implemented.

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