Determination Method, Device, Equipment and Storage Medium for Drainage Parameters of Coalbed Methane Wells

Abstract

The present application provides a method, device, equipment and storage medium for determining drainage parameters of a coalbed methane well, belonging to the technical field of coalbed methane development. The method includes: obtaining the displacement parameter of the drainage equipment for draining the target well to be studied; obtaining the first water production parameter during the operation of the target well and the second water production parameter during the shut-in of the target well; obtaining the preset daily drainage height of the target well; determining the drainage parameters of the target well based on the displacement parameter, the first water production parameter, the second water production parameter and the preset daily drainage height, where the drainage parameters are used to guide the operation and shut-in of the target well. By using the drainage parameters determined by this method to guide the operation and shut-in of the target well, the drainage capacity of the drainage equipment can be matched with the water production capacity of the reservoir, thereby improving the gas production efficiency of the coalbed methane well.

Description

Technical Field

[0001] This application relates to the technical field of coalbed methane development, and particularly relates to a method, device, equipment and storage medium for determining the drainage parameters of a coalbed methane well. Background Art

[0002] Before coalbed methane is mined, the reservoir of coalbed methane needs to be continuously drained to reduce the reservoir pressure below the desorption pressure, so that the reservoir can produce a large amount of gas. In the related art, drainage is generally carried out by drainage equipment. If the drainage capacity of the drainage equipment does not match the water production capacity of the reservoir, it is not conducive to the drainage of the coalbed methane well. For example, if the drainage rate is too large, some microfractures of the coalbed methane will be closed, resulting in a decrease in gas production capacity; if the drainage rate is too small, the drainage efficiency will be low. Therefore, it is necessary to determine the drainage parameters of the coalbed methane well to make the drainage capacity of the drainage equipment match the water production capacity of the reservoir, so as to improve the gas production efficiency of the coalbed methane well. Summary of the Invention

[0003] Embodiments of this application provide a method, device, equipment and storage medium for determining the drainage parameters of a coalbed methane well, which can improve the gas production efficiency of the coal seam. The technical solution is as follows:

[0004] On the one hand, a method for determining the drainage parameters of a coalbed methane well is provided. The method includes:

[0005] Obtain the displacement parameter of the drainage equipment for draining the target well to be studied;

[0006] Obtain the first water production parameter during the operation of the target well and the second water production parameter when the well is shut down;

[0007] Obtain the preset daily drainage height of the target well;

[0008] Based on the displacement parameter, the first water production parameter, the second water production parameter and the preset daily drainage height, determine the drainage parameters of the target well, and the drainage parameters are used to guide the operation and shutdown of the target well.

[0009] In a possible implementation manner, the displacement parameter includes the actual drainage volume of the drainage equipment per unit time;

[0010] The obtaining of the displacement parameter of the drainage equipment for draining the target well to be studied includes:

[0011] Obtain the theoretical drainage volume and drainage efficiency of the drainage equipment per unit time;

[0012] Based on the theoretical drainage volume and the drainage efficiency, determine the actual drainage volume of the drainage equipment per unit time.

[0013] In a possible implementation, the first water production parameter includes the first water production volume of the target well per unit time, the second water production parameter includes the second water production volume of the target well per unit time, and the displacement parameter includes the actual displacement volume of the drainage equipment per unit time;

[0014] The obtaining of the first water production parameter during the operation of the target well and the second water production parameter during the shut-in of the target well includes:

[0015] Obtaining the first height of the annulus liquid level drop during the operation of the target well, where the annulus liquid level is the liquid level formed in the annulus between the casing and the tubing in the target well;

[0016] Obtaining the size parameter of the casing and the size parameter of the tubing;

[0017] Based on the size parameter of the casing, the size parameter of the tubing, the actual displacement volume, and the first height, determining the first water production volume of the target well per unit time;

[0018] Obtaining the second height of the annulus liquid level rise during the shut-in of the target well;

[0019] Based on the size parameter of the casing, the size parameter of the tubing, and the second height, determining the second water production volume of the target well per unit time.

[0020] In a possible implementation, the size parameter of the casing includes the inner diameter of the casing, and the size parameter of the tubing includes the outer diameter of the tubing;

[0021] The determining of the first water production volume of the target well per unit time based on the size parameter of the casing, the size parameter of the tubing, the actual displacement volume, and the first height includes:

[0022] Based on the inner diameter of the casing and the outer diameter of the tubing, determining the cross-sectional area of the annulus liquid level;

[0023] Determining the product of the cross-sectional area and the first height to obtain the water volume drop of the target well per unit time;

[0024] Determining the difference between the actual displacement volume and the water volume drop to obtain the first water production volume of the target well per unit time.

[0025] In a possible implementation, the size parameter of the casing includes the inner diameter of the casing, and the size parameter of the tubing includes the outer diameter of the tubing;

[0026] The determining of the second water production volume of the target well per unit time based on the size parameter of the casing, the size parameter of the tubing, and the second height includes:

[0027] Based on the inner diameter of the casing and the outer diameter of the tubing, determine the cross-sectional area of the annulus liquid level;

[0028] Determine the product of the cross-sectional area and the second height to obtain the water recovery volume of the target well per unit time, and use the water recovery volume as the second water production volume of the target well per unit time.

[0029] In a possible implementation manner, the drainage parameters include the target operation duration and the target shut-in duration of the target well, the first water production parameter includes the first water production volume of the target well per unit time, the second water production parameter includes the second water production volume of the target well per unit time, and the displacement parameter includes the actual displacement volume of the drainage equipment per unit time;

[0030] The determining the drainage parameters of the target well based on the displacement parameter, the first water production parameter, the second water production parameter, and the preset drainage height includes:

[0031] Generate first relationship data based on the actual displacement volume, where the parameter of the first relationship data is the actual displacement volume, and the first relationship data is relationship data with the operation duration as the independent variable and the cumulative displacement volume of the drainage equipment as the dependent variable;

[0032] Generate second relationship data based on the first water production volume and the second water production volume, where the parameters of the second relationship data are the first water production volume and the second water production volume, and the second relationship data is relationship data with the operation duration as the first independent variable, the shut-in duration as the second independent variable, and the cumulative water production volume of the target well as the dependent variable;

[0033] Determine the preset daily drainage volume of the target well based on the preset daily drainage height;

[0034] Based on the first relationship data, the second relationship data, and the preset daily drainage volume, determine the target operation duration and the target shut-in duration when the preset daily drainage volume satisfies the first relationship data and the second relationship data.

[0035] On the other hand, a device for determining the drainage parameters of a coalbed methane well is provided, and the device includes:

[0036] A first acquisition module, configured to acquire the displacement parameter of a drainage equipment for draining water from a target well to be studied;

[0037] A second acquisition module, configured to acquire the first water production parameter during the operation of the target well and the second water production parameter during the shut-in of the target well;

[0038] A third acquisition module, configured to acquire a preset daily drainage height of the target well;

[0039] A determination module, configured to determine a drainage parameter of the target well based on the displacement parameter, the first water production parameter, the second water production parameter, and the preset daily drainage height, where the drainage parameter is used to guide the operation and shut-down of the target well.

[0040] In a possible implementation manner, the displacement parameter includes an actual displacement of the drainage device per unit time;

[0041] The first acquisition module includes:

[0042] A first acquisition unit, configured to acquire a theoretical displacement and a drainage efficiency of the drainage device per unit time;

[0043] A first determination unit, configured to determine an actual displacement of the drainage device per unit time based on the theoretical displacement and the drainage efficiency.

[0044] In a possible implementation manner, the first water production parameter includes a first water production volume of the target well per unit time, the second water production parameter includes a second water production volume of the target well per unit time, and the displacement parameter includes an actual displacement of the drainage device per unit time;

[0045] The second acquisition module includes:

[0046] A second acquisition unit, configured to acquire a first height of the annulus liquid level drop when the target well is operating, where the annulus liquid level is the liquid level formed in the annulus between the casing and the tubing in the target well;

[0047] A third acquisition unit, configured to acquire a size parameter of the casing and a size parameter of the tubing;

[0048] A second determination unit, configured to determine a first water production volume of the target well per unit time based on the size parameter of the casing, the size parameter of the tubing, the actual displacement, and the first height;

[0049] A fourth acquisition unit, configured to acquire a second height of the annulus liquid level rise when the target well is shut down;

[0050] A third determination unit, configured to determine a second water production volume of the target well per unit time based on the size parameter of the casing, the size parameter of the tubing, and the second height.

[0051] In a possible implementation manner, the size parameter of the casing includes an inner diameter of the casing, and the size parameter of the tubing includes an outer diameter of the tubing;

[0052] The second determination unit includes:

[0053] A first determination subunit, configured to determine the cross-sectional area of the annulus liquid level based on the inner diameter of the casing and the outer diameter of the tubing;

[0054] A second determination subunit, configured to determine the product of the cross-sectional area and the first height to obtain the water volume decrease of the target well per unit time;

[0055] A third determination subunit, configured to determine the difference between the actual drainage volume and the water volume decrease to obtain the first water production volume of the target well per unit time.

[0056] In a possible implementation manner, the size parameter of the casing includes the inner diameter of the casing, and the size parameter of the tubing includes the outer diameter of the tubing;

[0057] The third determination unit includes:

[0058] A fourth determination subunit, configured to determine the cross-sectional area of the annulus liquid level based on the inner diameter of the casing and the outer diameter of the tubing;

[0059] A fifth determination subunit, configured to determine the product of the cross-sectional area and the second height to obtain the water volume increase of the target well per unit time, and use the water volume increase as the second water production volume of the target well per unit time.

[0060] In a possible implementation manner, the drainage parameter includes the target operation duration and the target shut-in duration of the target well, the first water production parameter includes the first water production volume of the target well per unit time, the second water production parameter includes the second water production volume of the target well per unit time, and the displacement parameter includes the actual drainage volume of the drainage device per unit time;

[0061] The determination module includes:

[0062] A first generation unit, configured to generate first relationship data based on the actual drainage volume, where the parameter of the first relationship data is the actual drainage volume, and the first relationship data is relationship data with the operation duration as the independent variable and the cumulative drainage volume of the drainage device as the dependent variable;

[0063] A second generation unit, configured to generate second relationship data based on the first water production volume and the second water production volume, where the parameters of the second relationship data are the first water production volume and the second water production volume, and the second relationship data is relationship data with the operation duration as the first independent variable, the shut-in duration as the second independent variable, and the cumulative water production volume of the target well as the dependent variable;

[0064] A fourth determination unit, configured to determine a preset daily drainage volume of the target well based on the preset daily drainage height.

[0065] A fifth determination unit, configured to determine a target operation duration and a target shut - in duration when the preset daily drainage volume satisfies the first relationship data and the second relationship data, based on the first relationship data, the second relationship data, and the preset daily drainage volume.

[0066] On the other hand, a computer device is provided, which includes one or more processors and one or more memories. At least one instruction is stored in the one or more memories, and the at least one instruction is loaded and executed by the one or more processors to implement the operations performed by the method for determining drainage parameters of a coalbed methane well as described above.

[0067] On the other hand, a computer - readable storage medium is provided, in which at least one program code is stored, and the at least one program code is loaded and executed by a processor to implement the steps in the method for determining drainage parameters of a coalbed methane well according to any of the above implementation manners.

[0068] On the other hand, a computer program product or a computer program is provided. The computer program product or the computer program includes computer program code, and the computer program code is stored in a computer - readable storage medium. A processor of a computer device reads the computer program code from the computer - readable storage medium, and the processor executes the computer program code, so that the computer device performs the operations performed by the method for determining drainage parameters of the coalbed methane well as described above.

[0069] The beneficial effects of the technical solution provided by the embodiments of the present application at least include:

[0070] The embodiments of the present application provide a method for determining drainage parameters of a coalbed methane well. This method combines the displacement parameter of the drainage equipment, the first water - production parameter during the operation of the target well, and the second water - production parameter during the shut - in of the target well to determine the drainage parameters for the target well to drain water through the drainage equipment under the condition of meeting the preset daily drainage height. Furthermore, by guiding the operation and shut - in of the target well through these drainage parameters, the drainage capacity of the drainage equipment can be matched with the water - production capacity of the reservoir, thereby improving the gas - production efficiency of the coalbed methane well. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0072] Figure 1 It is a flowchart of a method for determining drainage parameters of a coalbed methane well provided by an embodiment of the present application;

[0073] Figure 2 It is a block diagram of a device for determining drainage parameters of a coalbed methane well provided by an embodiment of the present application;

[0074] Figure 3 It is a block diagram of a computer device provided by an embodiment of the present application. Detailed implementation manners

[0075] To make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe in detail the embodiments of the present application with reference to the accompanying drawings.

[0076] Terms such as "first", "second", "third", and "fourth" in the specification, claims, and accompanying drawings of the present application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0077] An embodiment of the present application provides a method for determining drainage parameters of a coalbed methane well. Refer to Figure 1 , the method includes:

[0078] Step 101: The computer device obtains the displacement parameter of the drainage device for draining water from the target well to be studied.

[0079] Among them, the target well to be studied can be a coalbed methane well. For example, taking a coalbed methane exploration well in the new coalbed methane mining area in northern Shanxi as an example, this well is used to mine the No. 9 coal seam of the Taiyuan Formation of the Carboniferous System. The depth of this coal seam is 1984.5 - 1997.8 m, the thickness is 13.3 m, and the gas content is 15 m 3 / t.

[0080] Among them, the displacement parameter includes the actual drainage volume of the drainage device per unit time, which is used to represent the actual drainage capacity of the drainage device.

[0081] This step can be implemented through the following steps (1)-(2):

[0082] (1) The computer device obtains the theoretical drainage volume and drainage efficiency of the drainage device per unit time.

[0083] Among them, different drainage equipment has different operating conditions, and the theoretical drainage volume is different under different operating conditions. Therefore, the computer device determines the theoretical drainage volume matching the operating conditions based on the operating conditions of the drainage equipment obtained in advance.

[0084] Among them, the operating conditions of the drainage equipment include the stroke of the drainage equipment, the pumping frequency, and the cross-sectional area of the pump of the drainage equipment. Determine the product of the stroke, the pumping frequency, and the cross-sectional area of the pump to obtain the theoretical drainage volume.

[0085] Continuing with the example of a coalbed methane exploration well, it uses a drainage equipment combination of a Model 14 pumping unit + a D44mm pump for drainage. The stroke under its minimum operating conditions is 5.0m, the pumping frequency is 3 times per minute, and the diameter of the pump is 0.044m. Then the theoretical drainage volume Q matching this operating condition 理 = 3.14×0.044×0.044÷4×5×3×60 = 1.4m 3 / h.

[0086] Among them, the drainage efficiency can be obtained from the actual working conditions of the drainage equipment; correspondingly, the steps for the computer device to obtain the drainage efficiency of the drainage equipment include: the computer device obtains the historical drainage data of the drainage equipment, and based on this historical drainage data, determines this drainage efficiency.

[0087] This historical drainage data includes the actual drainage volume and the theoretical drainage volume at the historical time. The steps for the computer device to determine this drainage efficiency based on this historical drainage data include: the computer device determines the quotient of the actual drainage volume and the theoretical drainage volume at this historical time to obtain this drainage efficiency.

[0088] Continuing with the example of a coalbed methane exploration well, the drainage efficiency of the drainage equipment of the coalbed methane exploration well reaches 95% or more, so that the actual drainage volume is basically consistent with the theoretical drainage volume.

[0089] (2) The computer device determines the actual drainage volume of the drainage equipment per unit time based on the theoretical drainage volume and the drainage efficiency.

[0090] Among them, the computer device determines the product of the theoretical drainage volume and the drainage efficiency to obtain the actual drainage volume of the drainage equipment per unit time.

[0091] The actual drainage volume is obtained through the following Formula 1:

[0092] Formula 1: Q 排 = a×Q 理

[0093] Among them, Q 排 is the actual drainage volume, a is the drainage efficiency, and Q 理 is the theoretical drainage volume.

[0094] For example, the drainage efficiency is 95%, and the theoretical drainage volume is 1.4 m 3 / h. Then, through Formula 1, the actual drainage volume is obtained as 1.33 m 3 / h.

[0095] Step 102: The computer device obtains the first water production parameter during the operation of the target well and the second water production parameter when the well is shut in.

[0096] Among them, the first water production parameter includes the first water production volume of the target well per unit time, representing the flowing ability of the reservoir water during the operation of the target well. The second water production parameter includes the second water production volume of the target well per unit time, representing the flowing ability of the reservoir water during the shut-in process of the target well.

[0097] This step can be implemented through the following steps (1)-(5):

[0098] (1) The computer device obtains the first height of the annulus liquid level drop during the operation of the target well. The annulus liquid level is the liquid level formed in the annulus between the casing and the tubing in the target well.

[0099] Among them, the first height of the annulus liquid level drop is the height dropped per unit time, obtained through the drainage experiment during the operation of the target well.

[0100] During the operation stage of the target well, the flow of the reservoir water is driven by the pressure difference between the reservoir pressure and the bottom-hole flowing pressure. The pressure difference is small first and then large, resulting in dynamic changes in the flowing ability of the formation water. Therefore, during the operation stage, a long-term drainage experiment needs to be carried out. When the inflow rate of the reservoir water into the wellbore is relatively fixed, the test is carried out to obtain the height of the annulus liquid level drop during the operation stage.

[0101] Among them, 3-5 groups of drainage experiments are carried out during operation. The multiple obtained heights of the liquid level drop are processed by means of data scatter analysis. After statistically analyzing the data within the confidence interval of the height data, the average value of these data is calculated, and the ratio of the average value to the operation duration during the operation stage is determined, then the first height is obtained.

[0102] Continuing with the example of a coalbed methane exploration well, the operation duration of the target well during the operation stage is 6 hours, and the height of the annulus liquid level drop is 42 meters, then the first height is 7 meters.

[0103] (2) The computer device obtains the size parameters of the casing and the size parameters of the tubing.

[0104] Among them, the size parameters of the casing include the inner diameter of the casing, and the size parameters of the tubing include the outer diameter of the tubing.

[0105] (3) The computer device determines the first water production volume of the target well per unit time based on the size parameters of the casing, the size parameters of the tubing, the actual drainage volume, and the first height.

[0106] This step can be achieved through the following steps A1 - A3:

[0107] A1: The computer device determines the cross - sectional area of the annulus liquid level based on the inner diameter of the casing and the outer diameter of the tubing.

[0108] Among them, the annulus liquid level can be calculated by the following formula (2).

[0109] Formula (2): S = π×(D 2 套管内径 - D 2 油管外径 ) / 4

[0110] Among them, S is the cross - sectional area, D 套管内径 is the inner diameter of the casing, and D 油管外径 is the outer diameter of the tubing.

[0111] Continuing with the example of a coalbed methane exploration well, the inner diameter of the casing is 124.26 mm, and the outer diameter of the tubing is 73 mm. Then, the cross - sectional area obtained through Formula (2) is 0.008 m 2 .

[0112] A2: The computer device determines the product of the cross - sectional area and the first height to obtain the water decline volume of the target well per unit time.

[0113] Among them, the water decline volume can be obtained through the following formula (3).

[0114] Formula (3): Q 下 = S×ΔH1

[0115] Among them, Q 下 is the water decline volume, S is the cross - sectional area, and ΔH1 is the first height.

[0116] Continuing with the example of a coalbed methane exploration well, the cross - sectional area is 0.008 m 3 , and the first height is 7 m. Then, the water decline volume obtained through Formula (3) is 0.056 m 3 / h.

[0117] A3: The computer device determines the difference between the actual drainage volume and the water decline volume to obtain the first water production volume of the target well per unit time.

[0118] Among them, the first water production volume is obtained through the following formula (4).

[0119] Formula (4): Q 地水排 = Q 排 –Q 下

[0120] Among them, Q 地水排 is the first water production volume, Q 排is the actual displacement, Q 下 is the water decline volume.

[0121] Continuing with the example of a coalbed methane exploration well, the actual displacement is 1.30 m 3 / h, and the water decline volume is 0.056 m 3 / h. Then, the first water production volume is obtained as 1.244 m 3 / h through Formula 4.

[0122] (4) The computer device obtains the second height of the annulus liquid level rise when the target well shuts in.

[0123] Among them, when the target well shuts in, the drainage equipment no longer drains the target well, and the second height of the annulus liquid level rise is the height of the actual water production increase in the reservoir.

[0124] Among them, the second height of the annulus liquid level rise is the height of the rise per unit time and is obtained through the shut-in test when the target well shuts in.

[0125] During the shut-in stage of the target well, the flow of reservoir water is driven by the pressure difference between the reservoir pressure and the bottom-hole flowing pressure. Since the pressure difference is large first and then small, the flow capacity of formation water will change dynamically. Therefore, during the shut-in stage, a relatively long shut-in test needs to be maintained, and the height of the annulus liquid level rise during the shut-in stage is measured when the flow rate of reservoir water into the wellbore is relatively fixed.

[0126] Among them, 3 - 5 groups of shut-in experiments are carried out when shutting in. After processing the obtained multiple heights of the liquid level rise by means of data scatter analysis, calculating the average value of these data after statistically analyzing the data within the confidence interval, and determining the ratio of this average value to the shut-in duration during the shut-in stage, the second height is obtained.

[0127] Continuing with the example of a coalbed methane exploration well, the shut-in duration of the target well during the shut-in stage is 3 hours, and the height of the annulus liquid level rise is 76 m. Then, the second height is 25.33 m.

[0128] (5) The computer device determines the second water production volume of the target well per unit time based on the size parameters of the casing, the size parameters of the tubing, and the second height.

[0129] This step can be implemented through the following steps A1 - A2:

[0130] A1: The computer device determines the cross-sectional area of the annulus liquid level based on the inner diameter of the casing and the outer diameter of the tubing.

[0131] Among them, the annulus liquid level can be calculated through the following Formula 2.

[0132] Formula 2: S = π×(D 2 套管内径 - D2 油管外径 ) / 4

[0133] Where S is the cross-sectional area, D 套管内径 is the inner diameter of the casing, D 油管外径 is the outer diameter of the oil pipe.

[0134] Taking the coalbed methane exploration well as an example, the inner diameter of the casing is 124.26 mm and the outer diameter of the oil pipe is 73 mm. The cross-sectional area is 0.008 m according to Formula 2. 2 .

[0135] A2: The computer equipment determines the product of the cross-sectional area and the second height, obtains the recovered water volume of the target well per unit time, and uses the recovered water volume as the second water production of the target well per unit time.

[0136] Among them, the amount of recovered water can be obtained by the following formula 5.

[0137] Formula 5: Q 回 =S×ΔH2

[0138] Among them, Q 回 is the amount of recovered water, S is the cross-sectional area, and ΔH2 is the second height.

[0139] The second water production can be obtained by the following formula 6.

[0140] Formula 6: Q 地水停 =Q 回

[0141] Continuing with the example of a coalbed methane exploration well, the cross-sectional area is 0.008m 2 , the second height is 25.33m, then the water volume recovered by formula 5 is 0.203m 3 / h, that is, the second water production is 0.203m 3 / h.

[0142] Step 103: The computer device obtains the preset daily drainage height of the target well.

[0143] Among them, the preset daily drainage height is the height of the annular liquid column drop, which is a preset given value, located within a certain range, and obtained from the logging data. Its maximum value is obtained based on the experiment of the change of the permeability of coal rock samples in the reservoir with effective stress, and its minimum value is obtained by the difference between the reservoir flow pressure and the desorption pressure before drainage by the drainage equipment and the predetermined maximum drainage time. The preset daily drainage height is between the maximum and minimum values ​​and can be set according to actual needs.

[0144] Continuing with the example of a coalbed methane exploration well, the preset daily production height of the coalbed methane exploration well can be 30m.

[0145] Step 104: The computer device determines the drainage parameters of the target well based on the displacement parameter, the first water production parameter, the second water production parameter, and the preset daily drainage height. The drainage parameters are used to guide the operation and shut-in of the target well.

[0146] Among them, the drainage parameters include the target operation duration and the target shut-in duration of the target well.

[0147] This step can be implemented through the following steps (1)-(4):

[0148] (1) The computer device generates first relational data based on the actual drainage volume. The parameter of the first relational data is the actual drainage volume, and the first relational data is relational data with the operation duration as the independent variable and the cumulative drainage volume of the drainage equipment as the dependent variable.

[0149] Among them, the first relational data is: Q 累排 =Q 排 ×t 运行 .

[0150] Among them, Q 累排 is the cumulative drainage volume, Q 排 is the actual drainage volume, and t 运行 is the operation duration.

[0151] (2) The computer device generates second relational data based on the first water production volume and the second water production volume. The parameters of the second relational data are the first water production volume and the second water production volume, and the second relational data is relational data with the operation duration as the first independent variable, the shut-in duration as the second independent variable, and the cumulative water production volume of the target well as the independent variable.

[0152] Among them, the second relational data is: Q 累入 =Q 地水排 ×t 运行 +Q 地水停 ×t 停井 .

[0153] Among them, Q 累入 is the cumulative water production volume, Q 地水排 is the first water production volume, Q 地水停 is the second water production volume, t 运行 is the operation duration, and t 停井 is the shut-in duration.

[0154] Among them, the cumulative water production volume of the target well includes the water production volume during the operation of the target well and the water production volume during the shut-in of the target well. The water production volume during the operation of the target well is the product of the operation duration and the first water production volume per unit time, and the water production volume during the shut-in of the target well is the product of the shut-in duration and the second water production volume per unit time. The cumulative water production volume of the target well is the sum of the water production volume during the operation of the target well and the water production volume during the shut-in of the target well.

[0155] (3) The computer device determines the preset daily drainage volume of the target well based on the preset daily drainage height.

[0156] Among them, the preset daily drainage volume is obtained by determining the product of the preset daily drainage height and the cross-sectional area of the annulus liquid level.

[0157] The preset daily drainage volume can be obtained through the following formula seven.

[0158] Formula seven: Q h = (π×(D 2 套管内径 - D 2 油管外径 ) / 4) × h

[0159] Among them, Q h is the preset daily drainage volume, h is the preset daily drainage height, D 套管内径 is the inner diameter of the casing, D 油管外径 is the outer diameter of the tubing.

[0160] Continuing with the example of a coalbed methane exploration well, the inner diameter of the casing is 124.26 mm, the outer diameter of the tubing is 73 mm, and the preset daily drainage height is 30 m. Then, the preset daily drainage volume obtained through formula seven is 0.24 m 3 .

[0161] (4) The computer device determines the target operation duration and the target shut-in duration when the preset daily drainage volume meets the first relationship data and the second relationship data based on the first relationship data, the second relationship data, and the preset daily drainage volume.

[0162] Among them, the sum of the target operation duration and the target shut-in duration is 24 h, that is, the time within a day is divided into an operation duration and a shut-in duration, so that the annulus liquid level in the wellbore drops by the preset daily drainage height within 24 h of 8:00 - 8:00. Since the drainage capacity of the drainage equipment is generally greater than the water production capacity of the reservoir, when the target well is operating, the drainage volume of the target well is large and the water recharge volume of the reservoir is small, and the annulus liquid level in the wellbore continuously drops; when the target well is shut in, the reservoir water continuously recharges and the annulus liquid level in the wellbore continuously rises. Therefore, by adjusting the operation duration and the shut-in duration of the target well, the annulus liquid level in the wellbore drops by the preset daily drainage height within 24 h of 8:00 - 8:00.

[0163] Among them, the preset daily drainage volume is the difference between the cumulative drainage volume and the cumulative water production volume, and can be expressed by the following formula eight.

[0164] Formula eight: Q h = Q 累排 - Q 累入

[0165] Among them, Q h is the preset daily drainage volume, Q累排 is the cumulative displacement, Q 累入 is the cumulative water production volume.

[0166] Among them, based on Formula VIII, the running duration and the shut-in duration, the following first set of simultaneous equations is obtained:

[0167]

[0168] Among them, Q 累排 = Q 排 ×t 运行 ; Q 累入 is the cumulative water production volume, Q 累入 = Q 地水排 ×t 运行 + Q 地水停 ×t 停井 , then the second set of simultaneous equations is obtained:

[0169]

[0170] The computer device solves the second set of simultaneous equations to obtain the running duration and the shut-in duration, which are used as the target running duration and the target shut-in duration respectively.

[0171] Continuing to take the coalbed methane exploration well as an example, the preset daily drainage volume is 0.24 m 3 , the first water production volume is 1.244 m 3 / h, and the second water production volume is 0.203 m 3 / h. Then, through the second set of simultaneous equations, the target running duration is obtained as 17.7 h, and the target shut-in duration is 6.3 h.

[0172] The drainage system formulated based on the target running duration and the target shut-in duration can be: running for 8 hours from 8:00 to 16:00, shutting in for 3.5 hours from 16:00 to 19:30, running for 9.7 hours from 19:30 to 5:10 (the next day), and shutting in for 2.8 hours from 5:10 to 8:00 (the next day). The working conditions corresponding to this drainage system are a stroke of 5.0 m and a pumping frequency of 3 times per minute.

[0173] Among them, the specific running stage and shut-in stage in the drainage system can be set and changed as needed, ensuring that the sum of the running durations of multiple running stages is the target running duration, and the sum of the shut-in durations of multiple shut-in stages is the target shut-in duration, so as to achieve meeting the preset daily drainage height through the intermittent pumping method.

[0174] Among them, the running and shut-in of the target well are controlled by the compiled intelligent control program, automatically adjusting the start and stop of the drainage equipment, realizing the preset daily drainage height of the annulus liquid level drop, so as to meet the drainage control requirements.

[0175] Among them, different drainage equipment has different operating conditions, that is, different theoretical drainage volumes, and thus different target operating durations and target well shutdown durations for the same preset daily drainage height. Moreover, for the same drainage equipment, different preset daily drainage heights result in different target operating durations and target well shutdown durations. Therefore, by combining the operating conditions and the preset daily drainage height, the target operating durations and target well shutdown durations under different operating conditions and different preset daily drainage heights are obtained, and a corresponding operation and well shutdown combination schedule is established. Furthermore, through the schedule, the target operating duration and the target well shutdown duration can be quickly and directly determined, thereby improving the drainage control efficiency.

[0176] Currently, for exploration wells or evaluation wells in new coalbed methane areas, due to the lack of logging data, the predicted water volume is relatively high but the actual water production capacity is relatively low. After these wells are put into production, they cannot quickly reach the preset daily drainage height. If they are to reach the preset daily drainage height, the well shutdown equipment needs to be replaced, and the replacement of the well shutdown equipment takes a long time. By determining the drainage parameters through the method provided in the embodiments of the present application and controlling the operating time and well shutdown time of the target well, the preset daily drainage height can be achieved, eliminating the waiting time for replacing the drainage equipment, and thus improving the drainage efficiency.

[0177] The method provided in the embodiments of the present application is applicable to determining the drainage system for wells where the water production capacity of the reservoir is not clearly understood, resulting in too fast a drainage rate and too fast a daily liquid level drop after production. Currently, it has been used in coalbed methane mining rights areas such as the southern part of the Qinshui Basin and the Ningwu Basin in Huabei Oilfield, effectively improving the drainage efficiency and meeting the on-site drainage control requirements. The method provided in the embodiments of the present application provides good guiding significance for the exploration and development of coalbed methane in China and meets the technical requirements in the current stage of coalbed methane development in China.

[0178] The embodiments of the present application provide a method for determining the drainage parameters of a coalbed methane well. The method combines the displacement parameter of the drainage equipment, the first water production parameter during the operation of the target well, and the second water production parameter during the well shutdown of the target well to determine the drainage parameters for the target well to drain water through the drainage equipment under the condition of meeting the preset daily drainage height. Furthermore, by guiding the operation and well shutdown of the target well through the drainage parameters, the drainage capacity of the drainage equipment can be matched with the water production capacity of the reservoir, thereby improving the gas production efficiency of the coalbed methane well.

[0179] The embodiments of the present application provide a device for determining the drainage parameters of a coalbed methane well. Refer to Figure 2 , the device includes:

[0180] The first acquisition module 201 is used to acquire the displacement parameter of the drainage equipment for draining water from the target well to be studied;

[0181] The second acquisition module 202 is used to acquire the first water production parameter during the operation of the target well and the second water production parameter during the well shutdown of the target well;

[0182] The third acquisition module 203 is configured to acquire the preset daily drainage height of the target well;

[0183] The determination module 204 is configured to determine the drainage parameters of the target well based on the displacement parameter, the first water production parameter, the second water production parameter, and the preset daily drainage height, and the drainage parameters are used to guide the operation and shut-in of the target well.

[0184] In a possible implementation, the displacement parameter includes the actual displacement of the drainage equipment per unit time;

[0185] The first acquisition module 201 includes:

[0186] The first acquisition unit is configured to acquire the theoretical displacement and drainage efficiency of the drainage equipment per unit time;

[0187] The first determination unit is configured to determine the actual displacement of the drainage equipment per unit time based on the theoretical displacement and drainage efficiency.

[0188] In a possible implementation, the first water production parameter includes the first water production volume of the target well per unit time, the second water production parameter includes the second water production volume of the target well per unit time, and the displacement parameter includes the actual displacement of the drainage equipment per unit time;

[0189] The second acquisition module 202 includes:

[0190] The second acquisition unit is configured to acquire the first height of the annulus liquid level drop during the operation of the target well, and the annulus liquid level is the liquid level formed in the annulus between the casing and the tubing in the target well;

[0191] The third acquisition unit is configured to acquire the size parameter of the casing and the size parameter of the tubing;

[0192] The second determination unit is configured to determine the first water production volume of the target well per unit time based on the size parameter of the casing, the size parameter of the tubing, the actual displacement, and the first height;

[0193] The fourth acquisition unit is configured to acquire the second height of the annulus liquid level rise when the target well is shut in;

[0194] The third determination unit is configured to determine the second water production volume of the target well per unit time based on the size parameter of the casing, the size parameter of the tubing, and the second height.

[0195] In a possible implementation, the size parameter of the casing includes the inner diameter of the casing, and the size parameter of the tubing includes the outer diameter of the tubing;

[0196] The second determination unit includes:

[0197] The first determination subunit is configured to determine the cross-sectional area of the annulus liquid level based on the inner diameter of the casing and the outer diameter of the tubing.

[0198] The second determination subunit is configured to determine the product of the cross-sectional area and the first height to obtain the water volume decrease of the target well per unit time.

[0199] The third determination subunit is configured to determine the difference between the actual drainage volume and the water volume decrease to obtain the first water production volume of the target well per unit time.

[0200] In a possible implementation manner, the size parameter of the casing includes the inner diameter of the casing, and the size parameter of the tubing includes the outer diameter of the tubing.

[0201] The third determination unit includes:

[0202] The fourth determination subunit is configured to determine the cross-sectional area of the annulus liquid level based on the inner diameter of the casing and the outer diameter of the tubing.

[0203] The fifth determination subunit is configured to determine the product of the cross-sectional area and the second height to obtain the water volume recovery of the target well per unit time, and use the water volume recovery as the second water production volume of the target well per unit time.

[0204] In a possible implementation manner, the drainage parameter includes the target operation duration and the target shut-in duration of the target well, the first water production parameter includes the first water production volume of the target well per unit time, the second water production parameter includes the second water production volume of the target well per unit time, and the displacement parameter includes the actual drainage volume of the drainage equipment per unit time.

[0205] The determination module 204 includes:

[0206] The first generation unit is configured to generate first relationship data based on the actual drainage volume. The parameter of the first relationship data is the actual drainage volume, and the first relationship data is a relationship data with the operation duration as the independent variable and the cumulative drainage volume of the drainage equipment as the dependent variable.

[0207] The second generation unit is configured to generate second relationship data based on the first water production volume and the second water production volume. The parameters of the second relationship data are the first water production volume and the second water production volume, and the second relationship data is a relationship data with the operation duration as the first independent variable, the shut-in duration as the second independent variable, and the cumulative water production volume of the target well as the dependent variable.

[0208] The fourth determination unit is configured to determine the preset daily drainage volume of the target well based on the preset daily drainage height.

[0209] The fifth determination unit is configured to determine the target operation duration and the target shut-in duration when the preset daily drainage volume satisfies the first relationship data and the second relationship data based on the first relationship data, the second relationship data, and the preset daily drainage volume.

[0210] Figure 3 FIG. Figure 3 shows a block diagram of a computer device 300 provided by an exemplary embodiment of the present application. The computer device 300 may be a portable mobile computer device, such as: a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III), an MP4 (Moving Picture Experts Group Audio Layer IV) player, a laptop computer, or a desktop computer. The computer device 300 may also be referred to by other names such as a user device, a portable computer device, a laptop computer device, a desktop computer device, etc.

[0211] Generally, the computer device 300 includes a processor 301 and a memory 302.

[0212] The processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 301 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), or PLA (Programmable Logic Array). The processor 301 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the wake state, also known as the CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 301 may be integrated with a GPU (Graphics Processing Unit), and the GPU is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 301 may also include an AI (Artificial Intelligence) processor, and the AI processor is used to process computational operations related to machine learning.

[0213] The memory 302 may include one or more computer-readable storage media, which may be non-transitory. The memory 302 may also include high-speed random access memory and non-volatile memory, such as one or more magnetic disk storage devices and flash memory storage devices. In some embodiments, the non-transitory computer-readable storage media in the memory 302 is used to store at least one instruction for being executed by the processor 301 to implement the method for determining drainage parameters of coalbed methane wells provided in the method embodiments of the present application.

[0214] In some embodiments, the computer device 300 may further optionally include: a peripheral device interface 303 and at least one peripheral device. The processor 301, the memory 302, and the peripheral device interface 303 may be connected through a bus or signal lines. Each peripheral device may be connected to the peripheral device interface 303 through a bus, signal lines, or a circuit board. Specifically, the peripheral device includes at least one of a radio frequency circuit 304, a display screen 305, a camera assembly 306, an audio circuit 307, a positioning assembly 308, and a power supply 309.

[0215] The peripheral device interface 303 may be used to connect at least one peripheral device related to I / O (Input / Output) to the processor 301 and the memory 302. In some embodiments, the processor 301, the memory 302, and the peripheral device interface 303 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 301, the memory 302, and the peripheral device interface 303 may be implemented on a separate chip or circuit board, and this embodiment does not limit this.

[0216] The radio frequency circuit 304 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuit 304 communicates with a communication network and other communication devices through electromagnetic signals. The radio frequency circuit 304 converts an electrical signal into an electromagnetic signal for transmission, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 304 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so on. The radio frequency circuit 304 may communicate with other computer devices through at least one wireless communication protocol. The wireless communication protocol includes but is not limited to: the World Wide Web, a metropolitan area network, an intranet, generations of mobile communication networks (2G, 3G, 4G, and 5G), a wireless local area network, and / or a WiFi (Wireless Fidelity) network. In some embodiments, the radio frequency circuit 304 may further include a circuit related to NFC (Near Field Communication), and this application does not limit this.

[0217] The display screen 305 is used to display the UI (User Interface). The UI may include graphics, text, icons, videos, and any combination thereof. When the display screen 305 is a touch display screen, the display screen 305 also has the ability to collect touch signals on or above the surface of the display screen 305. The touch signals can be input into the processor 301 as control signals for processing. At this time, the display screen 305 can also be used to provide virtual buttons and / or virtual keyboards, also known as soft buttons and / or soft keyboards. In some embodiments, there may be one display screen 305, which is disposed on the front panel of the computer device 300; in other embodiments, there may be at least two display screens 305, which are respectively disposed on different surfaces of the computer device 300 or are in a folding design; in other embodiments, the display screen 305 may be a flexible display screen, which is disposed on the curved surface or folding surface of the computer device 300. Even, the display screen 305 can also be set to an irregular non-rectangular shape, that is, a special-shaped screen. The display screen 305 can be prepared from materials such as LCD (Liquid Crystal Display) and OLED (Organic Light-Emitting Diode).

[0218] The camera assembly 306 is used to collect images or videos. Optionally, the camera assembly 306 includes a front camera and a rear camera. Generally, the front camera is disposed on the front panel of the computer device, and the rear camera is disposed on the back of the computer device. In some embodiments, there are at least two rear cameras, which are any one of a main camera, a depth-of-field camera, a wide-angle camera, and a telephoto camera, so as to realize the function of background blurring by fusing the main camera and the depth-of-field camera, the function of panoramic shooting by fusing the main camera and the wide-angle camera, and the VR (Virtual Reality) shooting function or other fusion shooting functions. In some embodiments, the camera assembly 306 may also include a flash. The flash can be a single-color-temperature flash or a two-color-temperature flash. The two-color-temperature flash refers to the combination of a warm-light flash and a cold-light flash, which can be used for light compensation under different color temperatures.

[0219] The audio circuit 307 may include a microphone and a speaker. The microphone is used to collect sound waves of the user and the environment, and convert the sound waves into electrical signals for input to the processor 301 for processing, or input to the radio frequency circuit 304 to achieve voice communication. For the purpose of stereo collection or noise reduction, there may be multiple microphones, which are respectively arranged at different parts of the computer device 300. The microphone may also be an array microphone or an omnidirectional collection microphone. The speaker is used to convert the electrical signal from the processor 301 or the radio frequency circuit 304 into sound waves. The speaker may be a traditional thin film speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, it can not only convert the electrical signal into sound waves audible to humans, but also convert the electrical signal into sound waves inaudible to humans for purposes such as ranging. In some embodiments, the audio circuit 307 may further include a headphone jack.

[0220] The positioning component 308 is used to locate the current geographical location of the computer device 300 to achieve navigation or LBS (Location Based Service). The positioning component 308 may be a positioning component based on the GPS (Global Positioning System) of the United States, the Beidou system of China, or the Galileo system of Russia.

[0221] The power supply 309 is used to supply power to each component in the computer device 300. The power supply 309 may be alternating current, direct current, a disposable battery, or a rechargeable battery. When the power supply 309 includes a rechargeable battery, the rechargeable battery may be a wired rechargeable battery or a wireless rechargeable battery. A wired rechargeable battery is a battery charged through a wired line, and a wireless rechargeable battery is a battery charged through a wireless coil. The rechargeable battery can also be used to support fast charging technology.

[0222] In some embodiments, the computer device 300 further includes one or more sensors 310. The one or more sensors 310 include but are not limited to: an acceleration sensor 311, a gyroscope sensor 312, a pressure sensor 313, a fingerprint sensor 314, an optical sensor 315, and a proximity sensor 316.

[0223] The acceleration sensor 311 can detect the magnitude of acceleration on the three coordinate axes of the coordinate system established with the computer device 300. For example, the acceleration sensor 311 can be used to detect the components of the gravitational acceleration on the three coordinate axes. The processor 301 can control the display screen 305 to display the user interface in a landscape view or a portrait view according to the gravitational acceleration signal collected by the acceleration sensor 311. The acceleration sensor 311 can also be used for collecting game or user's motion data.

[0224] The gyroscope sensor 312 can detect the body direction and rotation angle of the computer device 300. The gyroscope sensor 312 can cooperate with the acceleration sensor 311 to collect the 3D actions of the user on the computer device 300. Based on the data collected by the gyroscope sensor 312, the processor 301 can implement the following functions: motion sensing (such as changing the UI according to the user's tilting operation), image stabilization during shooting, game control, and inertial navigation.

[0225] The pressure sensor 313 can be disposed on the side frame of the computer device 300 and / or the lower layer of the display screen 305. When the pressure sensor 313 is disposed on the side frame of the computer device 300, it can detect the holding signal of the user on the computer device 300, and the processor 301 can perform left / right hand recognition or shortcut operations based on the holding signal collected by the pressure sensor 313. When the pressure sensor 313 is disposed on the lower layer of the display screen 305, the processor 301 can control the operable controls on the UI interface according to the pressure operation of the user on the display screen 305. The operable controls include at least one of button controls, scroll bar controls, icon controls, and menu controls.

[0226] The fingerprint sensor 314 is used to collect the fingerprints of the user. The processor 301 can identify the user's identity based on the fingerprints collected by the fingerprint sensor 314, or the fingerprint sensor 314 can identify the user's identity based on the collected fingerprints. When the identified user identity is a trusted identity, the processor 301 authorizes the user to perform relevant sensitive operations, and the sensitive operations include unlocking the screen, viewing encrypted information, downloading software, making payments, and changing settings, etc. The fingerprint sensor 314 can be disposed on the front, back, or side of the computer device 300. When there are physical buttons or manufacturer logos on the computer device 300, the fingerprint sensor 314 can be integrated with the physical buttons or manufacturer logos.

[0227] The optical sensor 315 is used to collect the ambient light intensity. In one embodiment, the processor 301 can control the display brightness of the display screen 305 according to the ambient light intensity collected by the optical sensor 315. Specifically, when the ambient light intensity is high, the display brightness of the display screen 305 is increased; when the ambient light intensity is low, the display brightness of the display screen 305 is decreased. In another embodiment, the processor 301 can also dynamically adjust the shooting parameters of the camera module 306 according to the ambient light intensity collected by the optical sensor 315.

[0228] A proximity sensor 316, also known as a distance sensor, is typically disposed on the front panel of the computer device 300. The proximity sensor 316 is used to collect the distance between the user and the front of the computer device 300. In one embodiment, when the proximity sensor 316 detects that the distance between the user and the front of the computer device 300 is gradually decreasing, the processor 301 controls the display screen 305 to switch from the lit state to the off state; when the proximity sensor 316 detects that the distance between the user and the front of the computer device 300 is gradually increasing, the processor 301 controls the display screen 305 to switch from the off state to the lit state.

[0229] Those skilled in the art can understand that Figure 3 the structure shown in does not constitute a limitation on the computer device 300, and may include more or fewer components than shown, or combine certain components, or adopt a different component arrangement.

[0230] On the other hand, a computer-readable storage medium is provided, in which at least one program code is stored, and the at least one program code is loaded and executed by a processor to implement the steps in the method for determining the drainage parameters of the coalbed methane well described in any of the above implementation manners.

[0231] On the other hand, a computer program product or a computer program is provided. The computer program product or the computer program includes computer program code, and the computer program code is stored in a computer-readable storage medium. The processor of the computer device reads the computer program code from the computer-readable storage medium, and the processor executes the computer program code, so that the computer device performs the operations performed by the method for determining the drainage parameters of the coalbed methane well described above.

[0232] In some embodiments, the computer program involved in the embodiments of the present application can be deployed to be executed on one computer device, or on multiple computer devices located at one location, or alternatively, on multiple computer devices distributed at multiple locations and interconnected by a communication network. The multiple computer devices distributed at multiple locations and interconnected by a communication network can form a blockchain system.

[0233] The embodiments of the present application provide a method for determining the drainage parameters of a coalbed methane well. The method combines the displacement parameter of the drainage device, the first water production parameter during the operation of the target well, and the second water production parameter when the target well stops production to determine the drainage parameters for the target well to drain water through the drainage device under the condition of meeting the preset daily drainage height; and then guides the operation and shutdown of the target well through the drainage parameters, which can match the drainage capacity of the drainage device with the water production capacity of the reservoir, thereby improving the gas production efficiency of the coalbed methane well.

[0234] The above are only alternative embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application.

Claims

1. A method for determining the drainage parameters of a coalbed methane well, characterized in that, The method includes: Obtaining the displacement parameter of the drainage equipment for draining the target well to be studied; Obtaining the first water production parameter when the target well is operating and the second water production parameter when the well is shut in; Obtaining the preset daily drainage height of the target well; Based on the displacement parameter, the first water production parameter, the second water production parameter, and the preset daily drainage height, determining the drainage parameter of the target well, where the drainage parameter is used to guide the operation and shut-in of the target well; Wherein, the first water production parameter includes the first water production volume of the target well per unit time, the second water production parameter includes the second water production volume of the target well per unit time, and the displacement parameter includes the actual drainage volume of the drainage equipment per unit time; The obtaining the first water production parameter when the target well is operating and the second water production parameter when the well is shut in includes: Obtaining the first height of the annulus liquid level drop when the target well is operating, where the annulus liquid level is the liquid level formed in the annulus between the casing and the tubing in the target well; Obtaining the size parameter of the casing and the size parameter of the tubing; Based on the size parameter of the casing, the size parameter of the tubing, the actual drainage volume, and the first height, determining the first water production volume of the target well per unit time; Obtaining the second height of the annulus liquid level rise when the target well is shut in; Based on the size parameter of the casing, the size parameter of the tubing, and the second height, determining the second water production volume of the target well per unit time.

2. The method for determining the drainage parameters of a coalbed methane well according to claim 1, wherein The displacement parameter includes the actual drainage volume of the drainage equipment per unit time; The obtaining the displacement parameter of the drainage equipment for draining the target well to be studied includes: Obtaining the theoretical drainage volume and the drainage efficiency of the drainage equipment per unit time; Based on the theoretical drainage volume and the drainage efficiency, determining the actual drainage volume of the drainage equipment per unit time.

3. The method for determining the drainage parameters of a coalbed methane well according to claim 1, wherein The size parameter of the casing includes the inner diameter of the casing, and the size parameter of the tubing includes the outer diameter of the tubing; The based on the size parameter of the casing, the size parameter of the tubing, the actual drainage volume, and the first height, determining the first water production volume of the target well per unit time includes: Based on the inner diameter of the casing and the outer diameter of the tubing, determining the cross-sectional area of the annulus liquid level; Determining the product of the cross-sectional area and the first height to obtain the water volume drop of the target well per unit time; Determining the difference between the actual drainage volume and the water volume drop to obtain the first water production volume of the target well per unit time.

4. The method for determining the drainage parameters of a coalbed methane well according to claim 1, wherein The size parameter of the casing includes the inner diameter of the casing, and the size parameter of the tubing includes the outer diameter of the tubing; The based on the size parameter of the casing, the size parameter of the tubing, and the second height, determining the second water production volume of the target well per unit time includes: Based on the inner diameter of the casing and the outer diameter of the tubing, determining the cross-sectional area of the annulus liquid level; Determining the product of the cross-sectional area and the second height to obtain the water volume rise of the target well per unit time, and taking the water volume rise as the second water production volume of the target well per unit time.

5. The method for determining the drainage parameters of a coalbed methane well according to claim 1, wherein The drainage parameters include the target operation duration and the target shut-in duration of the target well. The first water production parameter includes the first water production volume of the target well per unit time. The second water production parameter includes the second water production volume of the target well per unit time. The displacement parameter includes the actual displacement volume of the drainage equipment per unit time; Determining the drainage parameters of the target well based on the displacement parameter, the first water production parameter, the second water production parameter, and the preset daily pumping height includes: Generating first relationship data based on the actual displacement volume. The parameter of the first relationship data is the actual displacement volume, and the first relationship data is relationship data with the operation duration as the independent variable and the cumulative displacement volume of the drainage equipment as the dependent variable; Generating second relationship data based on the first water production volume and the second water production volume. The parameters of the second relationship data are the first water production volume and the second water production volume, and the second relationship data is relationship data with the operation duration as the first independent variable, the shut-in duration as the second independent variable, and the cumulative water production volume of the target well as the dependent variable; Determining the preset daily pumping volume of the target well based on the preset daily pumping height; Determining the target operation duration and the target shut-in duration when the preset daily pumping volume satisfies the first relationship data and the second relationship data based on the first relationship data, the second relationship data, and the preset daily pumping volume.

6. A device for determining drainage parameters of a coalbed methane well, characterized in that, The device includes: A first acquisition module for acquiring the displacement parameter of the drainage equipment for draining the target well to be studied; A second acquisition module for acquiring the first water production parameter during the operation of the target well and the second water production parameter during the shut-in of the target well; A third acquisition module for acquiring the preset daily pumping height of the target well; A determination module for determining the drainage parameters of the target well based on the displacement parameter, the first water production parameter, the second water production parameter, and the preset daily pumping height, where the drainage parameters are used to guide the operation and shut-in of the target well; Among them, the first water production parameter includes the first water production volume of the target well per unit time, the second water production parameter includes the second water production volume of the target well per unit time, and the displacement parameter includes the actual displacement volume of the drainage equipment per unit time. The second acquisition module is used for: Acquiring the first height of the annulus liquid level drop during the operation of the target well, where the annulus liquid level is the liquid level formed in the annulus between the casing and the tubing in the target well; Acquiring the size parameters of the casing and the size parameters of the tubing; Determining the first water production volume of the target well per unit time based on the size parameters of the casing, the size parameters of the tubing, the actual displacement volume, and the first height; Acquiring the second height of the annulus liquid level rise during the shut-in of the target well; Determining the second water production volume of the target well per unit time based on the size parameters of the casing, the size parameters of the tubing, and the second height.

7. The device for determining the drainage parameters of a coalbed methane well according to claim 6, characterized in that, The displacement parameter includes the actual displacement volume of the drainage equipment per unit time; The first acquisition module includes: A first acquisition unit, configured to acquire the theoretical drainage volume and drainage efficiency of the drainage device per unit time; A first determination unit, configured to determine the actual drainage volume of the drainage device per unit time based on the theoretical drainage volume and the drainage efficiency.

8. A computer device, characterized in that, The computer device includes one or more processors and one or more memories, and at least one instruction is stored in the one or more memories, and the at least one instruction is loaded and executed by the one or more processors to implement the operations performed by the method for determining drainage parameters of a coalbed methane well according to any one of claims 1 to 5.

9. A computer-readable storage medium, characterized in that, At least one instruction is stored in the storage medium, and the at least one instruction is loaded and executed by a processor to implement the operations performed by the method for determining drainage parameters of a coalbed methane well according to any one of claims 1 to 5.

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