Method and device for measuring gas loss of coal rock, storage medium and electronic equipment
By constructing an equivalent desorption mathematical model and correcting the data, the problem of large error in the measurement of gas loss in deep coal rock was solved, and the accurate measurement of gas loss in deep coal rock was achieved, which expanded the applicability of the measurement method.
Patent Information
- Application Number
- CN202310736285.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-20
- Publication Date
- 2024-12-20
AI Technical Summary
The prior art cannot effectively measure the gas loss of deep coal rock, resulting in large measurement errors and cannot meet the precise demands of deep coal rock.
By acquiring experimental desorption data, an equivalent desorption mathematical model is constructed, the target time of the rapid desorption stage is determined, and the lost gas volume is measured based on this, and the data is corrected using the equivalent desorption model to improve the accuracy of the measurement.
The precise measurement of the gas loss of deep coal rock is achieved, the applicability of the measurement method is expanded, and the error is reduced, and it is especially suitable for the determination of deep coal rock.
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Figure CN119164826A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of coalbed methane geological analysis, and in particular to a method, device, storage medium and electronic equipment for determining the amount of gas lost in coal. Background Art
[0002] The gas content of coal rock includes the measured gas escape (loss gas), desorbed gas and residual gas. Generally, there is a clear national standard to support the determination of lost gas (GB / T 19559-2008 "Method for Determination of Coalbed Methane Content"), but the applicability of this national standard is relatively narrow and cannot fully cover the determination of lost gas from coal rock drilled from different depths. For shallow coal rock, this standard has a small error and the calibration of coal seam gas content is more accurate. However, for deep coal rock, due to the extended drilling time, this standard cannot meet the relevant requirements, resulting in a large error in the lost gas measured using this standard. Based on this, how to improve the applicability and accuracy of the method for determining the lost gas content of coal rock is a technical problem that needs to be solved urgently. Summary of the invention
[0003] The embodiments of the present application provide a method, device, storage medium and electronic device for determining the gas loss of coal rocks. The technical solution provided in the present application can improve the applicability of the method for determining the gas loss of coal rocks, and improve the accuracy of determining the gas loss of coal rocks, especially can accurately measure the gas loss of deep coal rocks.
[0004] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.
[0005] According to the first aspect of an embodiment of the present application, a method for determining the gas loss of coal rock is provided, the method comprising: obtaining experimental desorption data of target coal rock; constructing an equivalent desorption mathematical model of the target coal rock based on the experimental desorption data; determining a target time for the target coal rock to complete a rapid desorption stage during the experimental desorption process according to the equivalent desorption mathematical model; and determining the gas loss of the target coal rock based on the target time and the experimental desorption data.
[0006] In some embodiments of the present application, based on the aforementioned scheme, the method also includes: obtaining the experimental desorption gas volume, residual gas volume, and mass of the target coal rock; and calculating the gas content of the target coal rock based on the lost gas volume, the experimental desorption gas volume, the residual gas volume, and the mass.
[0007] In some embodiments of the present application, based on the aforementioned scheme, the equivalent desorption mathematical model of the target coal rock is constructed based on the experimental desorption data, including: determining the equivalent desorption gas volume and the equivalent desorption time of the target coal rock based on the experimental desorption data; and constructing the equivalent desorption mathematical model of the target coal rock according to the equivalent desorption gas volume and the equivalent desorption time.
[0008] In some embodiments of the present application, based on the above scheme, the equivalent desorption mathematical model is:
[0009]
[0010] Where V is the desorption gas volume of the target coal rock, cm 3 ; t is desorption time, min; V e is the equivalent desorption gas volume of the target coal rock, cm 3 ;t e is the equivalent desorption time of the target coal rock, min.
[0011] In some embodiments of the present application, based on the aforementioned scheme, the target time for the target coal rock to complete the rapid desorption stage during the experimental desorption process is determined according to the equivalent desorption mathematical model, including: determining the equivalent desorption rate of the target coal rock according to the equivalent desorption mathematical model; calculating the equivalent desorption rate curvature of the target coal rock based on the equivalent desorption rate; calculating the slope of the equivalent desorption rate curvature of the target coal rock; and determining the target time for the target coal rock to complete the rapid desorption stage during the experimental desorption process according to the slope of the equivalent desorption rate curvature.
[0012] In some embodiments of the present application, based on the aforementioned scheme, the determination of the lost gas volume of the target coal rock based on the target time and the experimental desorption data includes: determining the target desorption gas volume of the rapid desorption stage from the experimental desorption data based on the target time; calculating the ratio of the target desorption gas volume and the target time to obtain the desorption rate of the rapid desorption stage as the target desorption rate; and determining the lost gas volume of the target coal rock based on the target desorption rate.
[0013] In some embodiments of the present application, based on the aforementioned scheme, the target coal rock is collected by a pressure-maintaining coring tank, and the lost gas volume of the target coal rock is determined based on the target desorption rate, including: obtaining the desorption time of the target coal rock in the pressure-maintaining coring tank as the loss time; and determining the lost gas volume of the target coal rock based on the target desorption rate and the loss time.
[0014] According to a second aspect of an embodiment of the present application, a device for determining the gas loss of coal rock is provided, the device comprising: an acquisition unit for acquiring experimental desorption data of a target coal rock; a construction unit for constructing an equivalent desorption mathematical model of the target coal rock based on the experimental desorption data; a determination unit for determining a target time for the target coal rock to complete a rapid desorption stage during the experimental desorption process according to the equivalent desorption mathematical model; and a determination unit for determining the gas loss of the target coal rock based on the target time and the experimental desorption data.
[0015] According to a third aspect of an embodiment of the present application, a computer-readable storage medium is provided, characterized in that at least one program code is stored in the computer-readable storage medium, and the at least one program code is loaded and executed by a processor to implement the operations performed by the method described in any one of the first aspects above.
[0016] According to a fourth aspect of an embodiment of the present application, an electronic device is provided, comprising one or more processors and one or more memories, wherein at least one program code is stored in the one or more memories, and the at least one program code is loaded and executed by the one or more processors to implement the operations performed by the method described in any one of the first aspects above.
[0017] The technical solution of the present application first obtains the experimental desorption data of the target coal rock; then constructs an equivalent desorption mathematical model of the target coal rock based on the experimental desorption data; then determines the target time for the target coal rock to complete the rapid desorption stage during the experimental desorption process according to the equivalent desorption mathematical model; and finally determines the loss of gas in the target coal rock based on the target time and the experimental desorption data. In the technical solution of the present application, the desorption data obtained are corrected using the constructed equivalent desorption mathematical model, so that the accurate target time for the target coal rock to complete the rapid desorption stage can be obtained, thereby making the calculated loss of gas in the target coal rock more accurate. In addition, the technical solution of the present application is not limited by the position of the coal rock drilling, and can accurately determine the loss of gas in deep coal rocks, making the applicability of the coal rock loss gas determination method of the present application more extensive.
[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:
[0020] Figure 1 A schematic flow chart of a method for determining gas loss in coal rock according to an embodiment of the present application is shown;
[0021] Figure 2 A diagram showing the relationship between desorption time and desorption gas volume according to an embodiment of the present application;
[0022] Figure 3 A detailed flow chart of constructing an equivalent desorption mathematical model of the target coal rock based on the experimental desorption data according to one embodiment of the present application is shown;
[0023] Figure 4 A linear relationship schematic diagram according to an embodiment of the present application is shown;
[0024] Figure 5 A detailed flow chart of determining the target time for the target coal rock to complete the rapid desorption stage during the experimental desorption process according to the equivalent desorption mathematical model according to one embodiment of the present application is shown;
[0025] Figure 6 A relationship diagram between the desorption time and the slope of the equivalent desorption rate curvature according to an embodiment of the present application is shown;
[0026] Figure 7 A detailed flow chart of determining the gas loss volume of the target coal rock based on the target time and the experimental desorption data according to one embodiment of the present application is shown;
[0027] Figure 8 A block diagram of a device for measuring gas loss in coal rock according to an embodiment of the present application is shown;
[0028] Fig. 9 A schematic diagram of the structure of a computer system suitable for implementing an electronic device of an embodiment of the present application is shown. DETAILED DESCRIPTION
[0029] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.
[0030] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.
[0031] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.
[0032] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.
[0033] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0034] Some embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.
[0035] See also Figure 1 , shows a schematic flow chart of a method for determining gas loss in coal rock according to an embodiment of the present application, specifically including S110 to S140.
[0036] S110, obtaining experimental desorption data of target coal rock.
[0037] In some embodiments, a desorption experiment may be conducted on the target coal rock in accordance with (GB / T 19559-2008 "Method for Determining Coalbed Methane Content"), and all data obtained during the experiment may be used as the experimental desorption data.
[0038] In some embodiments, a desorption experiment can be carried out on the target coal rock in accordance with (GB / T 19559-2008 "Method for Determination of Coalbed Methane Content"), and reasonable data can be screened out from all the data obtained during the experiment as the experimental desorption data. For example, the experimental data in the initial stage of the experimental desorption process can be screened out as the experimental desorption data to meet the desorption characteristics of the coal rock in the escape stage (i.e., the loss stage).
[0039] It should be noted that the experimental desorption data includes the desorption time, desorption gas volume, and the corresponding relationship between the desorption time and the desorption gas volume for the target coal rock. For example, Figure 2 The relationship between desorption time and desorption gas volume is shown in the figure. Figure 2 The data contained in is the desorption data.
[0040] It should also be noted that Figure 2 The desorbed gas amount shown in represents the cumulative desorbed gas amount obtained with respect to the target coal rock at the desorption time.
[0041] Continue to see Figure 1 , S120, constructing an equivalent desorption mathematical model of the target coal rock based on the experimental desorption data.
[0042] In some embodiments, the equivalent desorption mathematical model of the target coal rock constructed based on the experimental desorption data can be as follows: Figure 3 Follow the steps shown.
[0043] See also Figure 3 , shows a detailed flow chart of constructing an equivalent desorption mathematical model of the target coal rock based on the experimental desorption data according to an embodiment of the present application, specifically including S121 to S122.
[0044] S121, determining the equivalent desorption gas volume and equivalent desorption time of the target coal rock based on the experimental desorption data.
[0045] from Figure 2 It can be seen from the experimental desorption data shown that the relationship between the desorption time and the desorbed gas volume of the coal rock exhibits typical Langmuir mathematical model characteristics. Therefore, an equivalent desorption mathematical model of the target coal rock can be constructed based on the Langmuir model.
[0046] In some implementations, the equivalent desorption gas volume and the equivalent desorption time are determined according to the following steps S1 to S2.
[0047] S1, taking the desorption time t as the X-axis and the ratio t / V between the desorption time t and the desorption gas volume V as the Y-axis, a linear relationship between t and t / V is constructed.
[0048] For example, based on Figure 2 The linear relationship is constructed using the experimental desorption data contained in , so that the linear relationship is as follows Figure 4 shown.
[0049] S2, taking the reciprocal of the slope of the linear equation in the linear relationship as the equivalent desorbed gas amount, and taking the product of the intercept of the linear equation and the equivalent desorbed gas amount as the equivalent desorption time.
[0050] For example, Figure 4 In the linear relationship diagram shown, the obtained linear equation is y=0.00005x+0.02037, then the equivalent desorption gas volume can be determined to be 1 / 0.00005; the equivalent desorption time can be determined to be 0.02037*(1 / 0.00005).
[0051] Continue to see Figure 3 S122: construct an equivalent desorption mathematical model of the target coal rock according to the equivalent desorption gas volume and the equivalent desorption time. In some embodiments, the constructed equivalent desorption mathematical model is:
[0052]
[0053] Where V is the desorption gas volume of the target coal rock, cm 3 ; t is desorption time, min; V e is the equivalent desorption gas volume of the target coal rock, cm 3 ;t e is the equivalent desorption time of the target coal rock, min.
[0054] It should be noted that, in this embodiment, the equivalent desorption mathematical model of the target coal rock can also be constructed by other methods, and this application does not limit this.
[0055] Continue to see Figure 1 , S130, determining the target time for the target coal rock to complete the rapid desorption stage during the experimental desorption process according to the equivalent desorption mathematical model.
[0056] In some embodiments, the target time for the target coal rock to complete the rapid desorption stage during the experimental desorption process according to the equivalent desorption mathematical model can be determined as follows: Figure 5 Follow the steps shown.
[0057] See also Figure 5 , shows a detailed flow chart of determining the target time for the target coal rock to complete the rapid desorption stage during the experimental desorption process according to the equivalent desorption mathematical model according to an embodiment of the present application, specifically including S131 to S134.
[0058] S131, determining the equivalent desorption rate of the target coal rock according to the equivalent desorption mathematical model.
[0059] In some embodiments, the equivalent desorption mathematical model of the target coal rock may be first-order derived to obtain the equivalent desorption rate of the target coal rock.
[0060] Exemplarily, the equivalent desorption rate is obtained by first-order derivative of the above equivalent desorption mathematical model:
[0061]
[0062] Among them, V ， is the equivalent desorption rate of the target coal rock, cm 3 ; t is desorption time, min; V e is the equivalent desorption gas volume of the target coal rock, cm 3 ;t e is the equivalent desorption time of the target coal rock, min.
[0063] Continue to see Figure 5 , S132, calculating the equivalent desorption rate curvature of the target coal rock based on the equivalent desorption rate.
[0064] In some embodiments, the equivalent desorption rate curvature of the target coal rock may be calculated in the following manner:
[0065]
[0066] Among them, K is the equivalent desorption rate curvature of the target coal rock, and V represents the desorption gas volume of the target coal rock.
[0067] Exemplarily, the curvature of the above equivalent desorption rate is calculated to obtain:
[0068]
[0069] Where K is the equivalent desorption rate curvature of the target coal rock, t is the desorption time, min; V e is the equivalent desorption gas volume of the target coal rock, cm 3 ;t e is the equivalent desorption time of the target coal rock, min.
[0070] Continue to see Figure 5 , S133, calculate the slope of the equivalent desorption rate curvature of the target coal rock.
[0071] In some embodiments, the first-order derivative of the equivalent desorption rate curvature of the target coal rock may be taken to obtain the slope of the equivalent desorption rate curvature of the target coal rock.
[0072] Exemplarily, the first-order derivative of the equivalent desorption rate curvature of the above-mentioned target coal rock is obtained:
[0073]
[0074] Where S is the slope of the equivalent desorption rate curvature of the target coal rock; t is the desorption time, min; V e is the equivalent desorption gas volume of the target coal rock, cm 3 ;t e is the equivalent desorption time of the target coal rock, min.
[0075] Continue to see Figure 5 , S134, determining the target time for the target coal rock to complete the rapid desorption stage during the experimental desorption process according to the slope of the equivalent desorption rate curvature.
[0076] In some embodiments, the target time for the target coal rock to complete the rapid desorption stage during the experimental desorption stage can be determined from the mutation point in the equivalent desorption rate curvature of the target coal rock.
[0077] In some embodiments, the target time for the target coal rock to complete the rapid desorption stage during the experimental desorption stage can be determined from the dividing point in the slope of the equivalent desorption curvature of the target coal rock.
[0078] It should be noted that the desorption characteristics of the rapid desorption stage during the experimental desorption process are closest to the desorption characteristics in the dissipation stage. Therefore, the desorption characteristics of the target coal rock in the rapid desorption stage can be indirectly determined to determine the desorption characteristics in the dissipation stage.
[0079] In order to make those skilled in the art better understand this embodiment, Figure 6 Provide explanation.
[0080] See also Figure 6 , shows a graph showing the relationship between the desorption time and the slope of the equivalent desorption rate curvature according to an embodiment of the present application.
[0081] The dividing point can be understood as the point where the slope of the slope curve of the equivalent desorption rate curvature of coal rock changes suddenly, such as Figure 6 The point corresponding to the desorption time A shown (the slope of the equivalent desorption rate curvature) is the dividing point.
[0082] Therefore, the desorption time corresponding to point A can be used as the target time.
[0083] In this embodiment, it can be understood that after the above-mentioned steps S110 to S130, the target time for the target coal rock to complete the rapid desorption stage in the experimental desorption process is determined by constructing an equivalent desorption mathematical model. Compared with directly determining the target time through the experimental desorption data, the accuracy of the obtained target time can be greatly improved. It can be understood that the above-mentioned S110 to S130 of the present application can correct the experimental desorption data to obtain a target time with higher accuracy.
[0084] Continue to see Figure 1 , S140, determining the lost gas volume of the target coal rock based on the target time and the experimental desorption data.
[0085] In some embodiments, the loss gas volume of the target coal rock determined based on the target time and the experimental desorption data can be as follows: Figure 7 Follow the steps shown.
[0086] See also Figure 7 , shows a detailed flow chart of determining the gas loss volume of the target coal rock based on the target time and the experimental desorption data according to an embodiment of the present application, specifically including S141 to S143.
[0087] S141, determining a target desorption gas volume in the rapid desorption stage from the experimental desorption data based on the target time.
[0088] In order to make those skilled in the art better understand this embodiment, Figure 2 and Figure 6 Provide explanation.
[0089] from Figure 6 The demarcation point determined in corresponds to the desorption time at A, so the desorption time of A can be obtained from Figure 1 The desorbed gas volume corresponding to the A desorption time is determined, and the desorbed gas volume corresponding to the A desorption time is used as the cumulative desorbed gas volume of the target coal rock after completing the rapid desorption stage, that is, the target desorbed gas volume.
[0090] Continue to see Figure 7 , S142, calculating the ratio of the target desorption gas volume and the target time, and obtaining the desorption rate of the rapid desorption stage as the target desorption rate.
[0091] In some embodiments, the target desorption rate can be calculated by the following formula:
[0092]
[0093] Where Mr represents the target desorption rate of the target coal rock, cm 3 / min; Vr represents the target desorption gas volume of the target coal rock, cm 3 ;t r Represents the target time, min.
[0094] Continue to see Figure 7 , S143, determining the lost gas volume of the target coal rock based on the target desorption rate.
[0095] It should be noted that, in this embodiment, the specific method for determining the gas loss of the target coal rock is related to the depth of the target coal rock and the drilling method adopted. The scheme for determining the gas loss of coal rock in this application is particularly suitable for coal rock in deep drilling positions. Therefore, the following will focus on how to apply the technical scheme of this application to the determination of the gas loss of deep coal rock. Technicians can also calculate the gas loss based on the drilling method of shallow coal rock in combination with the technical scheme of this application, and this application will not be described in detail here.
[0096] Due to the particularity of deep coalbed methane, conventional coring methods will lead to the escape of a large amount of coalbed methane during the drilling process, which is not conducive to the measurement of lost gas volume. Therefore, the pressure-maintaining coring method can be used to drill deep coal rock, which can effectively preserve the small amount of coalbed methane desorbed during the drilling process.
[0097] When the pressure-maintaining coring barrel reaches the ground and the coal rock is loaded into the desorption tank (for experimental desorption), the release of the pressure in the pressure-maintaining coring barrel causes the coalbed methane to be rapidly desorbed, so the desorbed gas volume obtained in this stage is the lost gas volume.
[0098] Therefore, in some embodiments, if the target coal rock is collected by a pressure-maintaining coring tank, then the specific implementation of determining the lost gas volume of the target coal rock based on the target desorption rate can be performed as follows S1431 to S1432.
[0099] S1431, obtaining the desorption time of the target coal rock in the pressure-maintaining coring tank as the loss time.
[0100] S1432, determining the lost gas volume of the target coal rock based on the target desorption rate and the loss time.
[0101] In this embodiment, the lost gas volume can be determined by the following formula: V1 = M r *T b
[0102] Where V1 represents the gas loss of the target coal rock, cm 3 ;M r Represents the target desorption rate of the target coal rock, cm 3 / min; T b Represents the loss time of target coal rock, min.
[0103] The technical solution of the present application can be used to obtain the lost gas volume of the target coal rock, and thus the gas content of the target coal rock can be obtained by following steps S100 to S200.
[0104] S100, obtaining the experimental desorption gas volume, residual gas volume, and mass of the target coal rock.
[0105] In some embodiments, the experimental desorption gas volume and residual gas volume of the target coal rock can be obtained through experiments according to (GB / T 19559-2008 "Method for Determination of Coalbed Methane Content").
[0106] S200, calculating the gas content of the target coal rock based on the lost gas volume, the experimental desorbed gas volume, the residual gas volume, and the mass.
[0107] In some embodiments, the gas content of the target coal rock can be determined according to the following calculation formula:
[0108] V m =(V1+V d +V c ) / m
[0109] Among them, V m Represents the gas content of the target coal rock, cm 3 / g; V1 represents the loss of gas in the target coal rock, cm 3 ; V d Represents the experimental desorption gas volume of the target coal rock, cm 3 ; V c Represents the residual gas volume of the target coal rock, cm 3 ; m represents the mass of the target coal rock, g.
[0110] In order for the technical personnel of the present application to better understand the technical effects that can be produced by the technical solution of the present application, an explanation is given in conjunction with the following Table 1.
[0111]
[0112] Table 1
[0113] Table 1 above is an actual calculation of the gas content of coal rock drilled from a coalbed methane exploration well in the eastern edge of the Ordos Basin by applying the technical solution of the present application.
[0114] In the technical solutions provided in some embodiments of the present application, the experimental desorption data of the target coal rock is first obtained; then, an equivalent desorption mathematical model of the target coal rock is constructed based on the experimental desorption data; then, the target time for the target coal rock to complete the rapid desorption stage during the experimental desorption process is determined according to the equivalent desorption mathematical model; finally, the loss of gas of the target coal rock is determined based on the target time and the experimental desorption data. Through the technical solution of the present application, at least the following technical effects can be achieved:
[0115] 1) The experimental desorption data can be corrected using the constructed equivalent desorption mathematical model;
[0116] 2) The equivalent desorption mathematical model can be used to accurately determine the target time for the target coal rock to complete the rapid desorption stage;
[0117] 3) The technical solution of the present application can be used to obtain accurate desorption characteristics of the target coal rock in the loss stage, including loss gas volume, loss desorption rate, etc.;
[0118] 4) The technical solution of the present application enables the determination of the gas loss of coal rock to be not limited by the position of the coal rock drilling, and is particularly suitable for the determination of the gas loss of coal rock when drilling at deep depths;
[0119] 5) The technical solution of the present application makes the method for determining the gas loss of coal rock more widely applicable and makes the obtained gas content of coal rock more accurate.
[0120] Based on the same inventive concept, an embodiment of the present invention provides a device for measuring the amount of gas lost in coal rock, which can be used to perform the method for measuring the amount of gas lost in coal rock in the above embodiment of the present application. For details not disclosed in the embodiment of the present application, please refer to the embodiment of the method for measuring the amount of gas lost in coal rock in the above embodiment of the present application.
[0121] See also Figure 8 , shows a block diagram of a device for measuring the amount of gas loss in coal rock according to an embodiment of the present application.
[0122] like Figure 8 As shown, a device 800 for measuring gas loss in coal rock according to an embodiment of the present application includes: an acquisition unit 801 , a construction unit 802 , a determination unit 803 , and a measurement unit 803 .
[0123] Among them, the acquisition unit 801 is used to obtain the experimental desorption data of the target coal rock; the construction unit 802 is used to construct an equivalent desorption mathematical model of the target coal rock based on the experimental desorption data; the determination unit 803 is used to determine the target time for the target coal rock to complete the rapid desorption stage during the experimental desorption process according to the equivalent desorption mathematical model; the measurement unit 804 is used to measure the loss gas volume of the target coal rock based on the target time and the experimental desorption data.
[0124] In some embodiments of the present application, based on the aforementioned scheme, the measuring device also includes a calculation unit, which is also used to: obtain the experimental desorption gas volume, residual gas volume, and mass of the target coal rock; calculate the gas content of the target coal rock based on the lost gas volume, the experimental desorption gas volume, the residual gas volume, and the mass.
[0125] In some embodiments of the present application, based on the aforementioned scheme, the construction unit 802 is also used to: determine the equivalent desorption gas volume and equivalent desorption time of the target coal rock based on the experimental desorption data; and construct an equivalent desorption mathematical model of the target coal rock according to the equivalent desorption gas volume and the equivalent desorption time.
[0126] In some embodiments of the present application, based on the above scheme, the construction unit 802 is further used to: determine the equivalent desorption mathematical model as:
[0127]
[0128] Where V is the desorption gas volume of the target coal rock, cm 3 ; t is desorption time, min; V e is the equivalent desorption gas volume of the target coal rock, cm 3 ;t e is the equivalent desorption time of the target coal rock, min.
[0129] In some embodiments of the present application, based on the aforementioned scheme, the determination unit 803 is also used to: determine the equivalent desorption rate of the target coal rock according to the equivalent desorption mathematical model; calculate the equivalent desorption rate curvature of the target coal rock based on the equivalent desorption rate; calculate the slope of the equivalent desorption rate curvature of the target coal rock; and determine the target time for the target coal rock to complete the rapid desorption stage during the experimental desorption process according to the slope of the equivalent desorption rate curvature.
[0130] In some embodiments of the present application, based on the aforementioned scheme, the measuring unit 804 is also used to: determine the target desorption gas volume of the rapid desorption stage from the experimental desorption data based on the target time; calculate the ratio of the target desorption gas volume and the target time to obtain the desorption rate of the rapid desorption stage as the target desorption rate; and determine the lost gas volume of the target coal rock based on the target desorption rate.
[0131] In some embodiments of the present application, based on the aforementioned scheme, the target coal rock is collected by a pressure-maintaining coring tank, and the measuring unit 804 is also used to: obtain the desorption time of the target coal rock in the pressure-maintaining coring tank as the loss time; and determine the lost gas volume of the target coal rock based on the target desorption rate and the loss time.
[0132] Based on the same inventive concept, an embodiment of the present application provides a computer-readable storage medium, in which at least one computer program instruction is stored. The at least one computer program instruction is loaded and executed by a processor to implement the operations performed by the method described above.
[0133] Based on the same inventive concept, an embodiment of the present application also provides an electronic device.
[0134] See also Fig. 9 , shows a schematic diagram of the structure of an electronic device according to an embodiment of the present application, wherein the electronic device includes one or more memories 904, one or more processors 902, and at least one computer program (computer program instruction) stored in the memory 904 and executable on the processor 902, and the processor 902 implements the method described above when executing the computer program.
[0135] Among them, Fig. 9 In the embodiment of the present invention, a bus architecture (represented by bus 900) is shown, and bus 900 may include any number of interconnected buses and bridges, and bus 900 links various circuits including one or more processors represented by processor 902 and memory represented by memory 904. Bus 900 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. Bus interface 905 provides an interface between bus 900 and receiver 901 and transmitter 903. Receiver 901 and transmitter 903 may be the same element, namely a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 902 is responsible for managing bus 900 and general processing, while memory 904 may be used to store data used by processor 902 when performing operations.
[0136] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on a computer-readable medium or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. In addition, each functional unit may be integrated into a processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit.
[0137] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.
[0138] The units described as separate components may or may not be physically separated, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed in multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.
[0139] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly or all or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc., which can store computer program instructions.
[0140] The above description is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims
1. A method for measuring the gas loss of coal rock, characterized in that: The method comprises: Obtain experimental desorption data of target coal rock; Constructing an equivalent desorption mathematical model of the target coal rock based on the experimental desorption data; Determine the target time for the target coal rock to complete the rapid desorption stage during the experimental desorption process according to the equivalent desorption mathematical model; The lost gas volume of the target coal rock is determined based on the target time and the experimental desorption data.
2. The method according to claim 1, characterized in that: The method further comprises: Obtaining the experimental desorption gas volume, residual gas volume, and quality of the target coal rock; The gas content of the target coal rock is calculated based on the lost gas volume, the experimental desorbed gas volume, the residual gas volume, and the mass.
3. The method according to claim 1, characterized in that The equivalent desorption mathematical model of the target coal rock is constructed based on the experimental desorption data, including: Determine the equivalent desorption gas volume and equivalent desorption time of the target coal rock based on the experimental desorption data; An equivalent desorption mathematical model of the target coal rock is constructed according to the equivalent desorption gas volume and the equivalent desorption time.
4. The method according to claim 3, characterized in that The equivalent desorption mathematical model is: Where V is the desorption gas volume of the target coal rock, cm 3 ; t is desorption time, min; V e is the equivalent desorption gas volume of the target coal rock, cm 3 ;t e is the equivalent desorption time of the target coal rock, min.
5. The method according to claim 1, characterized in that Determining the target time for the target coal rock to complete the rapid desorption stage during the experimental desorption process according to the equivalent desorption mathematical model includes: Determining the equivalent desorption rate of the target coal rock according to the equivalent desorption mathematical model; Calculating an equivalent desorption rate curvature of the target coal rock based on the equivalent desorption rate; Calculating the slope of the equivalent desorption rate curvature of the target coal rock; The target time for the target coal rock to complete the rapid desorption stage during the experimental desorption process is determined according to the slope of the equivalent desorption rate curvature.
6. The method according to claim 1, characterized in that The determining of the gas loss volume of the target coal rock based on the target time and the experimental desorption data includes: determining a target desorbed gas volume in the rapid desorption phase from the experimental desorption data based on the target time; Calculating the ratio of the target desorption gas volume to the target time to obtain a desorption rate in the rapid desorption stage as a target desorption rate; The gas loss of the target coal rock is determined based on the target desorption rate.
7. The method according to claim 6, characterized in that The target coal rock is collected by a pressure-maintaining coring tank, and the loss gas volume of the target coal rock is determined based on the target desorption rate, including: Obtaining the desorption time of the target coal rock in the pressure-maintaining coring tank as the loss time; The lost gas volume of the target coal rock is determined based on the target desorption rate and the loss time.
8. A device for measuring the gas loss of coal rock, characterized in that: The device comprises: An acquisition unit, used for acquiring experimental desorption data of target coal rock; A construction unit, used for constructing an equivalent desorption mathematical model of the target coal rock based on the experimental desorption data; A determination unit, used to determine a target time for the target coal rock to complete a rapid desorption stage during an experimental desorption process according to the equivalent desorption mathematical model; A determination unit is used to determine the lost gas volume of the target coal rock based on the target time and the experimental desorption data.
9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores at least one program code, and the at least one program code is loaded and executed by a processor to implement the operations performed by the method according to any one of claims 1 to 7.
10. An electronic device, characterized in that: The method comprises one or more processors and one or more memories, wherein at least one program code is stored in the one or more memories, and the at least one program code is loaded and executed by the one or more processors to implement the method according to any one of claims 1 to 7.