Selection method, system, device and medium of tower electric pump

Abstract

The invention discloses a tower electric pump selection method, system, device and medium, and relates to the field of tower electric pump selection. The method determines the working condition of the inlet of the tower electric pump under each preset working condition according to a preset model and a plurality of groups of preset working conditions; determines the working condition of the corresponding gas-liquid separator and the inlet of the tower electric pump after being processed by the gas-liquid separator according to the working condition of the inlet of the tower electric pump; determines the type of the tower electric pump according to the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator; and finally determines the model of the tower electric pump based on the type of the tower electric pump. The method can accurately determine a reasonable model of the tower electric pump, and reduces the probability of many unfavorable situations such as aggravated wear in the tower electric pump, motor overload or underload, and low pump efficiency, etc., which may occur when an unreasonable model is used.

Description

Technical Field

[0001] The invention relates to the field of tower electric pump selection, and in particular to a tower electric pump selection method, system, device and medium. Background Art

[0002] As the gas reservoir is produced, water intrudes from the edge and bottom of the gas reservoir, and the water production of the gas well gradually increases. In addition, the gas reservoir energy decreases, the gas flow rate decreases, and the liquid carrying capacity deteriorates. In the late stage of production, the gas reservoir often needs to carry out drainage gas production technology to improve the recovery rate of the gas reservoir. Submersible electric pump drainage gas production is one of the processes. When submersible electric pumps are used in drainage gas wells, due to the high gas content and large flow changes in a set of units, multiple pump types are often used in series to form a tower submersible electric pump design.

[0003] Due to the complex structure of submersible electric pumps, the applicable displacement range of each model of submersible electric pumps is not the same. Selecting and applying a reasonable submersible electric pump model is of great significance to the long-term stable operation of the electric pump unit. When an inappropriate submersible electric pump is operated outside the recommended operating range, it may cause many unfavorable conditions such as increased wear in the pump, motor overload or underload, and low pump efficiency. In particularly serious cases, it may also cause damage to the entire unit. Once the unit is damaged, the gas well will not be able to continue production, and it is necessary to carry out well repair operations, remove the old unit and replace it with a new one. The economic loss includes not only the cost of the electric pump unit, but also the well repair cost and production loss. Therefore, when using submersible electric pumps in liquid drainage gas wells, it is very important to choose a reasonable pump type. The design and selection of traditional submersible electric pumps often depends on the experience of the designer, which is not difficult when designing a single working condition and a single pump type. However, gas wells have the characteristics of large production fluctuations, and the liquid production changes greatly before, during and after production. Therefore, the applicability of the unit under multiple working conditions needs to be considered during the selection and design. In addition, tower pump designs are often used in gas wells, which require multiple pump types to be used in series, which adds great difficulty to designers. Summary of the invention

[0004] The object of the present invention is to provide a method, system, device and medium for selecting a tower electric pump, which determines the working condition of the inlet of the tower electric pump under each preset working condition according to a preset model and several groups of preset working conditions; and determines the working condition of the corresponding gas-liquid separator and the inlet of the tower electric pump after being treated by the gas-liquid separator according to the working condition of the inlet of the tower electric pump, determines the type of the tower electric pump according to the working condition of the inlet of the tower electric pump after being treated by the gas-liquid separator, and finally determines the model of the tower electric pump based on the type of the tower electric pump, which can accurately determine a reasonable model of the tower electric pump, and reduces the probability of many unfavorable situations such as increased wear in the tower electric pump, motor overload or underload, and low pump efficiency when an unreasonable model is used.

[0005] In order to solve the above technical problems, the present invention provides a method for selecting a tower electric pump, the method comprising:

[0006] Determine the working condition of the inlet of the tower electric pump under each preset working condition according to the preset model and a plurality of preset working conditions;

[0007] Determine the corresponding gas-liquid separator according to the working condition of the inlet of the tower electric pump;

[0008] Determining the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator;

[0009] Determining the type of the tower electric pump according to the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator;

[0010] The model of the tower electric pump is determined based on the type of the tower electric pump.

[0011] Preferably, before determining the working condition of the inlet of the tower electric pump under each preset working condition according to the preset model and the plurality of preset working conditions, the method further includes:

[0012] Establish wellbore model, production fluid model and gas reservoir model according to preset information;

[0013] The pump hanging depth is determined based on the wellbore model, the production fluid model and the gas reservoir model, so that the user can set the position of the tower electric pump based on the pump hanging depth.

[0014] Preferably, before determining the working condition of the inlet of the tower electric pump under each preset working condition according to the preset model and the plurality of preset working conditions, the method further includes:

[0015] The preset operating conditions are determined according to the current value of the gas reservoir and the actual production demand.

[0016] Preferably, determining the type of the tower electric pump according to the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator includes:

[0017] Determining the maximum pump inlet gas volume fraction of the tower electric pump according to the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator;

[0018] Determine a target gas volume fraction range within which the maximum pump inlet gas volume fraction lies;

[0019] The type of the tower electric pump is determined based on the target gas volume fraction range; wherein different gas volume fraction ranges correspond to different types of tower electric pumps.

[0020] Preferably, determining the model of the tower electric pump based on the type of the tower electric pump comprises:

[0021] Selecting any model from the unselected models of the tower electric pump as the model to be determined based on the type of the tower electric pump and a preset electric pump database;

[0022] Determine the number of electric pump stages of the tower electric pump of the to-be-determined model when the tower electric pump reaches a preset head under the conditions of each of the working conditions, preset frequency and preset flow rate;

[0023] Determining whether the to-be-determined model is suitable for the tower electric pump based on the number of electric pump stages;

[0024] If yes, the model to be determined is used as the model of the tower electric pump;

[0025] If not, the method jumps back to the step of selecting any model from the unselected models of the tower electric pump as the model to be determined based on the type of the tower electric pump and the preset electric pump database.

[0026] Preferably, after taking the to-be-determined model as the model of the tower electric pump, the method further includes:

[0027] Determining the working condition of the outlet of the tower electric pump after being processed by the gas-liquid separator according to the preset model and the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator;

[0028] Determining the lift of the tower electric pump when it operates at the preset frequency under each of the preset working conditions according to the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator and the working condition of the outlet of the tower electric pump after being processed by the gas-liquid separator;

[0029] The lift is uploaded to the server.

[0030] Preferably, judging whether the to-be-determined model is suitable for the tower electric pump based on the number of electric pump stages includes:

[0031] Determining the operating frequency of the tower electric pump under each of the preset working conditions according to the number of electric pump stages;

[0032] Determine an electric pump control diagram corresponding to the tower electric pump according to the operating frequency;

[0033] Determining whether the tower electric pump is within a preset operating displacement range based on the operating frequency and the electric pump control diagram;

[0034] If so, it is determined that the current model to be determined is suitable for the tower electric pump, and the current operating power of the tower electric pump is determined, and the supporting auxiliary equipment corresponding to the tower electric pump is determined based on the operating frequency and the current operating power;

[0035] If not, it is determined that the current model to be determined is not suitable for the tower electric pump.

[0036] In order to solve the above technical problems, the present invention also provides a tower electric pump selection system, which comprises:

[0037] A first determining unit, configured to determine the working condition of the inlet of the tower electric pump under each of the preset working conditions according to a preset model and a plurality of preset working conditions;

[0038] A second determining unit, configured to determine a corresponding gas-liquid separator according to the working condition of the inlet of the tower electric pump;

[0039] A third determining unit, used to determine the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator;

[0040] a fourth determining unit, configured to determine the type of the tower electric pump according to the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator;

[0041] A fifth determining unit is configured to determine a model of the tower electric pump based on the type of the tower electric pump.

[0042] In order to solve the above technical problems, the present invention also provides a tower type electric pump selection device, which comprises:

[0043] Memory for storing computer programs;

[0044] A processor is used to implement the steps of the tower electric pump selection method as described above when executing the computer program.

[0045] To solve the above technical problems, the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the tower electric pump selection method as described above are implemented.

[0046] The object of the present invention is to provide a method, system, device and medium for selecting a tower electric pump, which determines the working condition of the inlet of the tower electric pump under each preset working condition according to a preset model and several groups of preset working conditions; and determines the working condition of the corresponding gas-liquid separator and the inlet of the tower electric pump after being treated by the gas-liquid separator according to the working condition of the inlet of the tower electric pump, determines the type of the tower electric pump according to the working condition of the inlet of the tower electric pump after being treated by the gas-liquid separator, and finally determines the model of the tower electric pump based on the type of the tower electric pump, which can accurately determine a reasonable model of the tower electric pump, and reduces the probability of many unfavorable situations such as increased wear in the tower electric pump, motor overload or underload, and low pump efficiency when an unreasonable model is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the prior art and the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0048] Figure 1 A schematic flow chart of a tower type electric pump selection method provided by the present invention;

[0049] Figure 2 A schematic flow chart of another method for selecting a tower type electric pump provided by the present invention;

[0050] Figure 3 A schematic diagram of a process for determining a target gas volume fraction range provided by the present invention;

[0051] Figure 4 A schematic diagram of the bottom-up selection process provided by the present invention;

[0052] Figure 5 The performance curve of the MER pump provided by the present invention at 60 Hz;

[0053] Figure 6 The performance curve of the FER pump provided by the present invention at 60Hz;

[0054] Figure 7 The macroscopic control diagram of the multiphase flow pump provided by the present invention;

[0055] Figure 8 The macroscopic control diagram of the conventional pump in the previous section provided by the present invention;

[0056] Fig. 9 The present invention is a schematic structural diagram of a tower type electric pump selection device. DETAILED DESCRIPTION

[0057] The core of the present invention is to provide a tower electric pump selection method, system, device and medium, determine the working conditions of the inlet of the tower electric pump under each preset working condition according to a preset model and several groups of preset working conditions; and determine the working conditions of the corresponding gas-liquid separator and the inlet of the tower electric pump after being treated by the gas-liquid separator according to the working conditions of the inlet of the tower electric pump, determine the type of the tower electric pump according to the working conditions of the inlet of the tower electric pump after being treated by the gas-liquid separator, and finally determine the model of the tower electric pump based on the type of the tower electric pump, which can accurately determine a reasonable model of the tower electric pump, and reduce the probability of many adverse situations such as increased wear in the tower electric pump, motor overload or underload, and low pump efficiency when an unreasonable model is used.

[0058] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments 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.

[0059] Please refer to Figure 1 , Figure 1 A schematic flow chart of a tower type electric pump selection method provided by the present invention, the method comprising:

[0060] S10: determining the working condition of the inlet of the tower electric pump under each preset working condition according to the preset model and a plurality of preset working conditions;

[0061] In the present invention, in order to determine the model of the tower electric pump, it is necessary to first determine the working condition of the inlet of the tower electric pump under each preset working condition according to a preset model and several preset working conditions, thereby ensuring the accuracy of the determination process.

[0062] It should be noted that in practical applications, the preset model is generally a wellbore multiphase flow calculation model, and the specific parameters included in each set of working conditions include: wellhead oil pressure, wellhead casing pressure, designed liquid production, designed gas production, downhole separator separation efficiency, bottom hole flow pressure and other parameters. According to the specific parameters included in each set of working conditions, the wellbore multiphase flow calculation model and the wellbore structure model, the Beggs-Brills (Beggs-Brils) wellbore multiphase flow calculation method is used to calculate the suction port depth section by section, and the pressure at the suction port position under each working condition, gas volume flow rate, gas volume fraction, total volume flow rate, mixed fluid density and other parameters are obtained.

[0063] S11: Determine the corresponding gas-liquid separator according to the working condition of the inlet of the tower electric pump;

[0064] In the present invention, in order to accurately determine the model of the tower electric pump, it is also necessary to determine the corresponding gas-liquid separator according to the working conditions of the inlet of the tower electric pump, thereby improving the reliability of the solution.

[0065] It should be noted that in practical applications, a reasonable suction port series can be selected according to the inner diameter of the tower electric pump casing, and then a reasonable separator model can be selected according to data such as the suction port gas volume fraction under various working conditions to obtain the actual separator separation efficiency under various working conditions, and the pump inlet working conditions after separation can be calculated based on the actual separator separation efficiency under various working conditions.

[0066] S12: Determine the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator;

[0067] In the present invention, after determining the gas-liquid separator corresponding to the tower electric pump, it is also necessary to determine the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator, and then determine the type of the tower electric pump based on the processed inlet working condition, thereby improving the accuracy of the solution.

[0068] S13: Determine the type of the tower electric pump according to the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator;

[0069] In the present invention, to determine the model of the tower electric pump, it is necessary to first determine the type of the tower electric pump, so it is necessary to determine the type of the tower electric pump according to the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator, thereby ensuring the integrity of the solution.

[0070] S14: Determine the model of the tower electric pump based on the type of the tower electric pump.

[0071] In the present invention, after determining the type of the tower electric pump, the model of the tower electric pump can be determined based on the type of the tower electric pump. The model of the tower electric pump thus determined is reasonable and can adapt to various working conditions, thereby reducing the probability of many adverse situations such as increased wear in the tower electric pump, motor overload or underload, and low pump efficiency caused by the use of an unreasonable model.

[0072] The present embodiment provides a method for selecting a tower electric pump, which determines the working condition of the inlet of the tower electric pump under each preset working condition according to a preset model and several groups of preset working conditions; and determines the working condition of the corresponding gas-liquid separator and the inlet of the tower electric pump after being treated by the gas-liquid separator according to the working condition of the inlet of the tower electric pump, and determines the type of the tower electric pump according to the working condition of the inlet of the tower electric pump after being treated by the gas-liquid separator. Finally, the model of the tower electric pump is determined based on the type of the tower electric pump, which can accurately determine a reasonable model of the tower electric pump, and reduces the probability of many adverse situations such as increased wear in the tower electric pump, motor overload or underload, and low pump efficiency when an unreasonable model is used.

[0073] Based on the above embodiments:

[0074] Please refer to Figure 2 , Figure 2 A schematic flow chart of another method for selecting a tower electric pump provided by the present invention.

[0075] As a preferred embodiment, before determining the working condition of the inlet of the tower electric pump under each preset working condition according to the preset model and several preset working conditions, the method further includes:

[0076] Establish wellbore model, production fluid model and gas reservoir model according to preset information;

[0077] The pump hanging depth is determined based on the wellbore model, the production fluid model and the gas reservoir model, so that the user can set the position of the tower electric pump based on the pump hanging depth.

[0078] In the present invention, before determining the working condition of the inlet of the tower electric pump under each preset working condition according to the preset model and several preset working conditions, a wellbore model, a production fluid model and a gas reservoir model are established according to the preset information, and the pump hanging depth is determined based on these three models, so that the user can set the position of the tower electric pump based on the pump hanging depth.

[0079] It should be noted that the preset information generally includes: wellbore trajectory, well depth structure and other information. The preset information is generally determined by the actual situation, and the present invention does not limit the specific type of the preset information.

[0080] It should also be noted that the wellbore model includes the wellbore trajectory (including the vertical depth and inclined depth of each node in the tower electric pump), the oil casing structure (the inner diameter, outer diameter, inner and outer wall roughness of the oil pipe, as well as the inner diameter of the casing, the inner wall roughness of the casing, etc.), the perforation section parameters (perforation depth, perforation section temperature), and the ground parameters (ground temperature). The production fluid model includes the density and viscosity parameters of the gas phase and the liquid phase.

[0081] It should also be noted that in practical applications, a gas well as shown in Table 1 may be adopted, and relevant characteristic parameters of the gas well are shown in Table 1.

[0082] Table 1. Related characteristic parameters of the gas well

[0083] Well Type Liquid relative density Relative density of natural gas Liquid viscosity mPa·s Naoi 1 0.74 2.98 Gas viscosity mPa·s Perforation depth m Casing inner diameter mm Oil pipe outer diameter (mm) 0.0122 3200 121 72 Oil pipe inner diameter (mm) Casing roughness m Wellhead fluid temperature K Reservoir temperature K 63 <![CDATA[4.57×10 -5 ]]> 233 373

[0084] According to the wellbore structure, the pump hanging depth can be deepened as much as possible under the conditions permitted by the equipment to minimize the impact of free gas on the electric pump. In practical applications, the pump hanging depth can be designed to be 3000m, but the actual pump hanging depth needs to be determined according to actual conditions, and the present invention does not make any special limitation here.

[0085] As a preferred embodiment, before determining the working condition of the inlet of the tower electric pump under each preset working condition according to the preset model and several preset working conditions, the method further includes:

[0086] The preset operating conditions are determined according to the current values ​​of the gas reservoir and the actual production requirements.

[0087] In the present invention, before determining the working conditions of the inlet of the tower electric pump under each preset working condition according to the preset model and several preset working conditions, each preset working condition will be determined according to the current value of the gas reservoir and the actual production demand, so that the applied preset working conditions are more accurate and more in line with the actual production needs.

[0088] It should be noted that in actual production, it is necessary to establish multiple groups of production conditions in each period of the life cycle of the electric pump according to the specific conditions of the oil and gas reservoir and the actual production needs. The specific parameters contained in each group of conditions generally include: wellhead oil pressure, wellhead casing pressure, designed liquid production, designed gas production, downhole separator separation efficiency, and bottom hole flow pressure.

[0089] It should also be noted that the designed gas production refers to the volumetric production of natural gas under standard conditions. In this application, the liquid produced by the formation is considered incompressible, and the volume of gas under specified working conditions is calculated using the following formula:

[0090]

[0091] Where V is the volume of natural gas under calculation conditions, m 3 ; P is the absolute pressure value under the calculation condition, MPa; T is the temperature under the calculation condition, K;

[0092] P stp is the absolute pressure under standard conditions, which is 0.101MPa; T stp is the temperature under standard conditions, which is 273.15K; V stp is the volume of natural gas under standard conditions, m 3 ; Z is the natural gas compression factor under the calculation conditions, dimensionless.

[0093] In the present invention, the compression factor of natural gas at different pressures and temperatures can be calculated using the Hall-Yarborough method, and the calculation formula is:

[0094]

[0095] Where Z is the natural gas compression factor under the calculation conditions, dimensionless; p r is the relative pressure, MPa; t is the reciprocal of the relative temperature 1 / T r , K-1; Y is the comparative density, which can be obtained by the following formula:

[0096]

[0097] X1=-0.06125p r texp[-1.2(1-t) 2 ]……(4)

[0098] X2=14.76t-9.76t 2 +4.58t 3 ……(5)

[0099] X3=90.7t-242.2t 2 +42.4t 3……(6)

[0100] X4=2.18+2.82t……(7)

[0101] X1, X2, X3, and X4 are values ​​calculated using the inverse of the contrast temperature, and are calculated using formula (4-7) respectively. The solution of the Y value in formula (3) is the contrast density required by formula (2).

[0102] It should also be noted that, based on the numerical simulation of oil and gas reservoirs, historical production data of adjacent wells and other means, the typical operating parameters of all stages of the life cycle of the above-mentioned gas well electric pump are estimated, as summarized in Table 2:

[0103] Table 2

[0104] Condition Name Initial production Mid-production Late production Wellhead oil pressure MPa 4 4 4 Wellhead casing pressure MPa 2 2 2 <![CDATA[Design gas production volume m 3 / d]]> 15000 30000 15000 <![CDATA[Design liquid production rate m 3 / d]]> 150 100 50 Suction port pressure MPa 13 10 8

[0105] Using the wellbore multiphase flow calculation model, the pump inlet parameters under various working conditions without gas-liquid separator treatment are calculated, as shown in Table 3:

[0106] Table 3

[0107]

[0108] According to the working condition of the suction port and the size of the casing, the outer diameter of 101.6mm is selected, and the rotary separator is used in series. According to the test data provided by the manufacturer, the separation efficiency under the three working conditions is higher than 90%. For safety reasons, the separation efficiency under the three working conditions is 90%. Based on this separation efficiency, the pump inlet parameters under each working condition after the gas-liquid separator is calculated, and the calculation results are shown in Table 4 below.

[0109] Table 4

[0110]

[0111] Afterwards, the liquid and gas flow rates in the oil pipe can be obtained according to the separation efficiency. The Beggs-Brills multiphase flow calculation model is used to calculate downward according to the wellhead oil pressure to obtain the operating parameters at the pump outlet. The calculation results are shown in Table 5.

[0112] Table 5

[0113]

[0114] As a preferred embodiment, the type of the tower electric pump is determined according to the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator, including:

[0115] Determine the maximum gas volume fraction of the tower electric pump according to the working condition of the tower electric pump inlet after being processed by the gas-liquid separator;

[0116] Determine the target gas volume fraction range where the maximum pump inlet gas volume fraction is located;

[0117] The type of the tower electric pump is determined based on the target gas volume fraction range; wherein different gas volume fraction ranges correspond to different types of tower electric pumps.

[0118] In the present invention, in order to determine the type of the tower electric pump, it is necessary to determine the maximum pump inlet gas volume fraction of the tower electric pump according to the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator, and determine in which gas volume fraction range the maximum pump inlet gas volume fraction of the tower electric pump is specifically located. The type of the tower electric pump is determined according to the target gas volume fraction range, and the type of the tower electric pump is determined more accurately.

[0119] It should be noted that, 1. The process of determining the target gas volume fraction range in which the maximum pump inlet gas volume fraction is located is to first determine whether the maximum pump inlet gas volume fraction is within the first preset gas volume fraction range; if the maximum pump inlet gas volume fraction is within the first preset gas volume fraction range, the type of the tower electric pump is determined to be a gas treatment pump, a multiphase flow pump and a conventional pump; 2. If the maximum pump inlet gas volume fraction is not within the first preset gas volume fraction range, determine whether the maximum pump inlet gas volume fraction is within the second preset gas volume fraction range; if the maximum pump inlet gas volume fraction is within the second preset gas volume fraction range, determine the type of the tower electric pump to be a multiphase flow pump and a conventional pump; 3. If the maximum pump inlet gas volume fraction is not within the second preset gas volume fraction range, determine whether the maximum pump inlet gas volume fraction is within the third preset gas volume fraction range; if the maximum pump inlet gas volume fraction is within the third preset gas volume fraction range, determine the type of the tower electric pump to be a conventional pump.

[0120] It should also be noted that the first preset gas volume fraction range > the second preset gas volume fraction range > the third preset gas volume fraction range. If the maximum pump inlet gas volume fraction is not within these three preset gas volume fraction ranges, then it is not recommended to use an electric submersible pump for the tower type electric pump, that is, in actual applications, there is no electric pump that is adapted to this maximum pump inlet gas volume fraction.

[0121] It should also be noted that, in actual applications, the first preset gas volume fraction range is generally 70% < maximum pump inlet gas volume fraction ≤ 75%, the second preset gas volume fraction range is generally 35% < maximum pump inlet gas volume fraction ≤ 70%, and the third preset gas volume fraction range is generally maximum pump inlet gas volume fraction ≤ 35%; if the maximum pump inlet gas volume fraction is > 75%, then it is not recommended to use an electric submersible pump for a tower pump.

[0122] It should also be noted that in actual applications, the available pump types are divided into three categories according to the gas processing capacity: gas processing pumps, multiphase flow pumps and conventional pumps. The maximum gas volume fractions allowed by the three pumps are 75%, 70% and 35% respectively. In this example, the maximum gas volume fraction of the pump is 41.2%, so a combination of multiphase flow pump + conventional pump is used. The order of tower electric pumps from bottom to top is generally gas processing pump, multiphase flow pump, conventional pump, and the three pump types allow different gas volume fractions of the pump.

[0123] It should also be noted that the process of determining the target gas volume fraction range where the maximum pump inlet gas volume fraction is located is as follows: Figure 3 shown.

[0124] As a preferred embodiment, determining the model of the tower electric pump based on the type of the tower electric pump includes:

[0125] Selecting any model from unselected models of tower electric pumps as the model to be determined based on the type of tower electric pump and a preset electric pump database;

[0126] Determine the number of electric pump stages of the tower electric pump of the to-be-determined model when it reaches a preset head under various working conditions, preset frequencies and preset flow rates;

[0127] Determine whether the model to be determined is suitable for a tower electric pump based on the number of electric pump stages;

[0128] If yes, the model to be determined will be used as the model of the tower electric pump;

[0129] If not, the process jumps again to the step of selecting any model from the unselected models of the tower electric pump as the model to be determined based on the type of the tower electric pump and the preset electric pump database.

[0130] In the present invention, based on the determined type of tower electric pump, any model is selected from the unselected models in the preset electric pump database as the to-be-determined model of the tower electric pump, and the number of electric pump stages of the tower electric pump of the to-be-determined model when it reaches a preset head under various working conditions, preset frequencies and preset flow conditions is determined, and based on the number of electric pump stages, it is determined whether the to-be-determined model is suitable for the tower electric pump. If it is not suitable, any model is selected from the unselected models in the preset electric pump database as the new to-be-determined model of the tower electric pump, and it is judged whether the new to-be-determined model is suitable for the tower electric pump, until the selected to-be-determined model is suitable for the tower electric pump, the suitable to-be-determined model is used as the model of the tower electric pump, thereby more accurately determining the model of the tower electric pump.

[0131] It should be noted that the suction port, pump outlet, and the connection point of the two pumps are set as analysis nodes. The design gas volume fraction, gas / liquid phase flow rate and other parameters at each stage are calculated, and the summary is shown in Table 6. Among them, the gas volume fraction at the connection point of the two pumps is set to the smaller value of the maximum pump inlet gas volume fraction of the upper pump and the gas volume fraction of the pump inlet node.

[0132] Table 6

[0133]

[0134]

[0135] According to the calculation information in the above table, the calculation parameters of the multiphase flow pump and the conventional pump are calculated as shown in Table 7.

[0136] Table 7

[0137]

[0138] It should be noted that in practical applications, the pump inlet, pump outlet, and the connection between the two pump types can be set as analysis nodes (the parameters of each group of working conditions at the suction port and pump outlet nodes can be calculated through the parameters of the pump inlet and pump outlet). And according to the maximum pump inlet gas volume fraction limit of the selected pump types, the design gas volume fraction at each pump connection node is determined, and the model of the tower electric pump is determined by the design gas volume fraction at each pump connection node.

[0139] It should also be noted that the above determination method is: 1. The smaller value of the maximum allowable pump inlet gas volume fraction of the pump type above each node and the pump inlet node gas volume fraction is used as the design gas volume fraction at the connection node. Then, according to the design gas volume fraction of each node, the total flow rate of each node under each operating condition when it meets the design gas volume fraction condition is calculated. The calculation formula is as follows:

[0140]

[0141] Where λ is the gas volume fraction at the node, dimensionless; Q w is the daily liquid output, m 3 / d;Q t is the total gas-liquid flow rate when the gas volume fraction is λ, m 3 / d.

[0142] 2. According to the design gas volume fraction of each node, calculate the pressure value of each node under each working condition when it meets the design gas volume fraction condition. The calculation formula is as follows:

[0143]

[0144] Among them, Qg is the daily gas production under standard conditions, m 3 / d;Q w is the daily liquid output, m 3 / d;T i is the suction port temperature, K; η is the separation efficiency of the downhole gas-liquid separator, dimensionless; P stp is the absolute pressure under standard conditions, which is 0.101MPa; T stp is the temperature under standard conditions, which is 273.15K; λ is the gas volume fraction at the node, which is dimensionless; Z is the natural gas compression factor under the calculation conditions, which is dimensionless.

[0145] 3. According to the designed gas volume fraction of each node, calculate the total density of the fluid between each node under each working condition, and then use the average fluid density and pressure difference between the two nodes to calculate the required head. The calculation formula is as follows:

[0146]

[0147] Where H is the design head between the two nodes, m; ΔP is the pressure difference between the two nodes, Pa; ρ is the weighted average density of the fluid between the two nodes, Kg / m 3 ; g is the acceleration due to gravity, which is 9.8N / Kg.

[0148] 4. Finally, the calculated design head is used as the head required between the two nodes, and the model of the tower electric pump is selected based on this head.

[0149] It should also be noted that in actual applications, it is necessary to select reasonable models step by step from bottom to top. The process of bottom-up selection is as follows: Figure 4 As shown. Calculate the number of pump stages required for each pump. The specific steps are:

[0150] 1. Arrange the total flow rate at the pump inlet and pump outlet under each set of operating conditions, as well as the required head and average flow rate between nodes.

[0151] 2. Select a model from the database of the lowest pump type, and calculate the number of electric pumps required to achieve the required pump head under the conditions of maximum frequency and average flow under different working conditions. The calculation formula is as follows:

[0152]

[0153] Among them, n ij h is the number of stages calculated for the i-th pump under the j-th operating condition, dimensionless; ij is the required head of the i-th pump under the j-th working condition, m; is the total gas-liquid mixed flow rate in the average pump of the i-th pump, Q ij and Q i+1jare the total flow rates of the upper and lower nodes of the i-th pump, m 3 / d;H(Q′ ij ,f max ) is the average flow rate of the selected pump type in the pump, and the frequency is the maximum frequency f max Single-stage head under, m.

[0154] 3. Select the group with the largest number of stages in all working conditions and set it as a fixed number of stages n. i .

[0155] 4. Calculate the head of the electric pump at the maximum frequency under various working conditions, convert it into pressure head using formula (10), and update the design parameters of each node and between nodes. The calculation formula for the head of the electric pump at different frequencies is as follows:

[0156]

[0157] Among them, n i is the number of stages of the electric pump in the ith section; is the average total gas-liquid mixed flow rate in the pump of section i; f ij is the operating frequency of the jth working condition when calculating the i-th pump, Hz; f np is the rated power of the electric pump, Hz; H np (Q) is the head function of the electric pump at rated power, m, which is generally a quintic function fitted based on test data.

[0158] 5. If all pump models have been determined, design the next pump; otherwise, repeat steps 2-4.

[0159] It should also be noted that in actual applications, if there are multiple types of tower pumps, such as multiphase flow pumps and conventional pumps, the reasonable pump type is generally selected from bottom to top, and the number of stages required for each pump is calculated. For example: First, select and design the multiphase flow pump at the bottom. Select a pump type from the multiphase flow pump database for design. Here, take the MER pump as an example. The performance curve of this pump type at the rated frequency (60Hz) is as follows: Figure 5 As shown, the recommended operating range of this pump type at rated frequency is 8-461m 3 / d. According to the information provided by the manufacturer, the maximum frequency is 70Hz. The number of stages to achieve the required head under the conditions of maximum frequency and average pump flow in each working condition is calculated respectively. The required number of electric pump stages under each working condition is calculated using formula (11): 0, 41, and 64. The maximum value of 64 is selected as the number of this electric pump stage. Therefore, the 64-stage MER pump is temporarily used as the next multiphase flow pump. Whether it is reasonable still needs to be determined based on subsequent calculations.

[0160] If the maximum frequency is 70Hz, the operating status of the 64-stage MER pump under various operating conditions is calculated under the condition of a maximum frequency of 70Hz, and its outlet operating condition parameters are updated to the node parameters at the connection point of the two pumps in Table 5, and the design parameters of the conventional pump in the upper section in Table 7 are updated. The updated tables are shown in Tables 8 and 9.

[0161] Table 8

[0162]

[0163] Table 9

[0164]

[0165]

[0166] Next, select and design the conventional pump in the previous section. Select a pump type from the conventional pump database for design. Here, take the FER pump as an example. The performance curve of this pump type at the rated frequency (60Hz) is as follows: Figure 6 As shown, the recommended operating range of this pump type at rated frequency is 8-445m3 / d. Calculate the number of stages to reach the required head under the conditions of maximum frequency and average pump flow in each working condition. The formula is used to calculate the required number of electric pump stages under each working condition: 122, 166, and 233. The maximum value 233 is selected as the number of this energy-saving pump. Therefore, the 233-level FER pump is temporarily used as the conventional pump in the upper section. Whether it is reasonable still needs to be determined based on subsequent calculations. So far, both energy-saving pumps have been designed, which are a combination of 64-level MER + 233-level FER. After both energy-saving pumps have been selected, the next step is to calculate the operating frequency of the entire unit under each working condition, and ensure that the entire unit operates within the recommended operating range under all working conditions through the frequency under each working condition.

[0167] As a preferred embodiment, after the model to be determined is used as the model of the tower electric pump, the method further includes:

[0168] Determine the working condition of the outlet of the tower electric pump after being treated by the gas-liquid separator according to the preset model and the working condition of the inlet of the tower electric pump after being treated by the gas-liquid separator;

[0169] In the present invention, in order to determine the head of the tower electric pump when it runs at a preset frequency under various preset working conditions, it is necessary to first determine the working condition of the outlet of the tower electric pump after being treated by the gas-liquid separator based on the preset model and the working condition of the inlet of the tower electric pump after being treated by the gas-liquid separator, thereby ensuring the stability of the solution.

[0170] It should be noted that in practical applications, the wellhead oil pressure, designed gas production, designed liquid production, gas-liquid separator separation efficiency, wellbore multiphase flow calculation model and wellbore structure model inputted from each set of operating conditions can be used to calculate step by step to the pump outlet depth through the Beggs-Brills wellbore multiphase flow calculation method to obtain parameters such as pressure at the pump outlet position under each operating condition, gas volume flow rate, gas volume fraction, total volume flow rate, mixed fluid density, etc.

[0171] Determine the lift of the tower electric pump when it runs at a preset frequency under each preset working condition according to the working condition of the inlet of the tower electric pump after being treated by the gas-liquid separator and the working condition of the outlet of the tower electric pump after being treated by the gas-liquid separator;

[0172] Upload the lift to the server.

[0173] In the present invention, after the model to be determined is used as the model of the tower electric pump, the working condition of the outlet of the tower electric pump after being treated by the gas-liquid separator is determined according to the preset model and the working condition of the inlet of the tower electric pump after being treated by the gas-liquid separator, and the lift of the tower electric pump when it runs at a preset frequency under each preset working condition is determined through these two working conditions, and the lift is uploaded to the server. Uploading this part of the lift to the server can make it easier for the server to update the design parameters of each energy-saving pump in the tower electric pump according to this part of the lift.

[0174] As a preferred embodiment, judging whether the model to be determined is suitable for a tower electric pump based on the number of electric pump stages includes:

[0175] Determine the operating frequency of the tower electric pump under each preset working condition according to the number of electric pump stages;

[0176] Determine the electric pump control diagram corresponding to the tower electric pump according to the operating frequency;

[0177] Determine whether the tower electric pump is within a preset operating displacement range based on the operating frequency and the electric pump control diagram;

[0178] If so, it is determined that the current model to be determined is suitable for the tower electric pump, and the current operating power of the tower electric pump is determined, and the corresponding supporting auxiliary equipment of the tower electric pump is determined based on the operating frequency and the current operating power;

[0179] If not, it is determined that the current model to be determined is not suitable for the tower electric pump.

[0180] In the present invention, the electric pump control diagram corresponding to the tower electric pump is determined by the operating frequency of the tower electric pump under various preset working conditions, and then it is judged whether the tower electric pump is within the preset operating displacement range through the operating frequency and the electric pump control diagram. If the tower electric pump is within the preset operating displacement range, it is judged that the current model to be determined is suitable for the tower electric pump, and it is necessary to determine the current operating power of the tower electric pump, and determine the corresponding supporting auxiliary equipment of the tower electric pump based on the operating frequency and the current operating power; if the tower electric pump is not within the preset operating displacement range, it is judged that the current model to be determined is not suitable for the tower electric pump, and it is more accurately judged whether the model to be determined is suitable for the tower electric pump.

[0181] It should be noted that in practical applications, the head and pump displacement are approximately fitted into a quintic equation, and the analytical solution of the frequency is very complicated. Therefore, manual calculation of this step is very cumbersome, and this step is automatically calculated step by step with the help of a computer. First, set the frequency to 0.1Hz. According to the average displacement in the pump, calculate the head of each power-saving pump at this frequency, and then calculate the pump outlet pressure. If the calculated pump outlet pressure is lower than the designed pump outlet pressure, the frequency is increased by 0.1Hz and recalculated; if the calculated pump outlet pressure is higher than the designed pump outlet pressure, the frequency at this time is the unit operating frequency. According to the calculation, the operating frequencies before, during and after production are 60.5Hz, 62.7Hz and 69.9Hz respectively. Since the recommended operating range of the electric pump is related to the operating frequency, it is necessary to determine whether all pumps are operating within the recommended operating range under all working conditions. The horizontal and vertical coordinates of the electric pump control diagram are displacement and head, respectively. The head curves at the maximum and minimum frequencies and the area surrounded by the upper and lower boundaries of the displacement are the recommended operating range. The pump inlet and pump outlet operating points of each pump under all operating conditions are plotted on the electric pump control diagram. If they are all within the recommended operating range, the design is feasible. Otherwise, it means that the selected electric pump unit cannot cover all design operating conditions. The electric pumps that do not meet the conditions need to be eliminated and the calculation started again. The control diagrams of the two electric pumps in this case are as follows: Figure 7 , Figure 8 As shown in the figure, all operating points meet the conditions. After the electric pump selection and design work is completed, reasonable motors, protectors, cables, frequency converters and other equipment are selected according to needs. The design method is the same as the conventional electric pump design method.

[0182] The present invention also provides an embodiment corresponding to a tower type electric pump selection system, the system comprising:

[0183] A first determining unit, configured to determine the working condition of the inlet of the tower electric pump under each preset working condition according to a preset model and a plurality of preset working conditions;

[0184] A second determining unit is used to determine a corresponding gas-liquid separator according to the working condition of the inlet of the tower electric pump;

[0185] A third determining unit is used to determine the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator;

[0186] a fourth determining unit, configured to determine the type of the tower electric pump according to the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator;

[0187] The fifth determining unit is configured to determine the model of the tower electric pump based on the type of the tower electric pump.

[0188] The tower electric pump selection system provided in this embodiment corresponds to the above method, and thus has the same beneficial effects as the above method. Therefore, for the embodiments of the tower electric pump selection system, please refer to the description of the embodiments of the method part, which will not be repeated here.

[0189] Please refer to Fig. 9 , Fig. 9 The present invention provides a schematic diagram of the structure of a tower type electric pump selection device. The device comprises:

[0190] A memory 20, used for storing computer programs;

[0191] The processor 21 is used to implement the steps of the tower electric pump selection method as described above when executing the computer program.

[0192] The tower electric pump selection device provided in this embodiment may include but is not limited to a smart phone, a tablet computer, a laptop computer or a desktop computer.

[0193] Among them, the processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 21 can be implemented in at least one hardware form of a digital signal processor (DSP), a field-programmable gate array (FPGA), and a programmable logic array (PLA). The processor 21 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a central processing unit (CPU); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 21 may be integrated with a graphics processing unit (GPU), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 21 may also include an artificial intelligence (AI) processor, which is used to process computing operations related to machine learning.

[0194] The memory 20 may include one or more computer-readable storage media, which may be non-transitory. The memory 20 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In this embodiment, the memory 20 is at least used to store the following computer program 201, wherein, after the computer program is loaded and executed by the processor 21, the relevant steps of the tower electric pump selection method disclosed in any of the aforementioned embodiments can be implemented. In addition, the resources stored in the memory 20 may also include an operating system 202 and data 203, etc., and the storage method may be temporary storage or permanent storage. Among them, the operating system 202 may include Windows, Unix, Linux, etc. Data 203 may include, but is not limited to, a tower electric pump selection method, etc.

[0195] In some embodiments, the tower electric pump selection device may further include a display screen 22 , an input / output interface 23 , a communication interface 24 , a power supply 25 , and a communication bus 26 .

[0196] Those skilled in the art will understand that Fig. 9 The structure shown in the figure does not constitute a limitation on the selection device of the tower electric pump, and may include more or less components than those shown in the figure.

[0197] The purpose of this embodiment is to provide a tower electric pump selection device, in which the memory 20 is used to store computer programs, and the processor 21 is used to implement the steps of the tower electric pump selection method as described above when executing the computer program, so that the tower electric pump selection process is more efficient and accurate.

[0198] The present invention also provides an embodiment corresponding to a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the tower electric pump selection method as described above are implemented.

[0199] It is understandable that if the method in the above embodiment 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 such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium to execute all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0200] The computer-readable storage medium provided in this embodiment corresponds to the above method, and therefore has the same beneficial effects as the above method. Therefore, for the embodiments of the computer-readable storage medium part, please refer to the description of the embodiments of the method part, which will not be repeated here.

[0201] It should be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0202] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for selecting a tower electric pump, characterized in that: include: Determine the working condition of the inlet of the tower electric pump under each preset working condition according to the preset model and a plurality of preset working conditions; Determine the corresponding gas-liquid separator according to the working condition of the inlet of the tower electric pump; Determining the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator; Determining the type of the tower electric pump according to the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator; Determining a model of the tower electric pump based on the type of the tower electric pump; Determining the type of the tower electric pump according to the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator includes: Determining the maximum pump inlet gas volume fraction of the tower electric pump according to the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator; Determine a target gas volume fraction range within which the maximum pump inlet gas volume fraction lies; Determining the type of the tower electric pump based on the target gas volume fraction range; wherein different gas volume fraction ranges correspond to different types of tower electric pumps; Determining the model of the tower electric pump based on the type of the tower electric pump includes: Selecting any model from the unselected models of the tower electric pump as the model to be determined based on the type of the tower electric pump and a preset electric pump database; Determine the number of electric pump stages of the tower electric pump of the to-be-determined model when the tower electric pump reaches a preset head under the conditions of each of the working conditions, preset frequency and preset flow rate; Determining whether the to-be-determined model is suitable for the tower electric pump based on the number of electric pump stages; If yes, the model to be determined is used as the model of the tower electric pump; If not, the method jumps back to the step of selecting any model from the unselected models of the tower electric pump as the model to be determined based on the type of the tower electric pump and the preset electric pump database.

2. The tower type electric pump selection method according to claim 1, characterized in that: Before determining the working condition of the inlet of the tower electric pump under each preset working condition according to the preset model and the plurality of preset working conditions, the method further includes: Establish wellbore model, production fluid model and gas reservoir model according to preset information; The pump hanging depth is determined based on the wellbore model, the production fluid model and the gas reservoir model, so that the user can set the position of the tower electric pump based on the pump hanging depth.

3. The tower type electric pump selection method according to claim 1, characterized in that: Before determining the working condition of the inlet of the tower electric pump under each preset working condition according to the preset model and the plurality of preset working conditions, the method further includes: The preset operating conditions are determined according to the current value of the gas reservoir and the actual production demand.

4. The tower type electric pump selection method according to claim 1, characterized in that: After the to-be-determined model is used as the model of the tower electric pump, the method further includes: Determining the working condition of the outlet of the tower electric pump after being processed by the gas-liquid separator according to the preset model and the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator; Determining the lift of the tower electric pump when it operates at the preset frequency under each of the preset working conditions according to the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator and the working condition of the outlet of the tower electric pump after being processed by the gas-liquid separator; The lift is uploaded to the server.

5. The tower type electric pump selection method according to claim 1, characterized in that: Judging whether the to-be-determined model is suitable for the tower electric pump based on the number of electric pump stages includes: Determining the operating frequency of the tower electric pump under each of the preset working conditions according to the number of electric pump stages; Determine an electric pump control diagram corresponding to the tower electric pump according to the operating frequency; Determining whether the tower electric pump is within a preset operating displacement range based on the operating frequency and the electric pump control diagram; If so, it is determined that the current model to be determined is suitable for the tower electric pump, and the current operating power of the tower electric pump is determined, and the supporting auxiliary equipment corresponding to the tower electric pump is determined based on the operating frequency and the current operating power; If not, it is determined that the current model to be determined is not suitable for the tower electric pump.

6. A tower electric pump selection system, characterized in that: include: A first determining unit, configured to determine the working condition of the inlet of the tower electric pump under each of the preset working conditions according to a preset model and a plurality of preset working conditions; A second determining unit, configured to determine a corresponding gas-liquid separator according to the working condition of the inlet of the tower electric pump; A third determining unit, used to determine the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator; a fourth determining unit, configured to determine the type of the tower electric pump according to the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator; a fifth determining unit, configured to determine a model of the tower electric pump based on the type of the tower electric pump; The fourth determining unit is specifically configured to: Determining the maximum pump inlet gas volume fraction of the tower electric pump according to the working condition of the inlet of the tower electric pump after being processed by the gas-liquid separator; Determine a target gas volume fraction range within which the maximum pump inlet gas volume fraction lies; Determining the type of the tower electric pump based on the target gas volume fraction range; wherein different gas volume fraction ranges correspond to different types of tower electric pumps; The fifth determining unit is specifically configured to: Selecting any model from the unselected models of the tower electric pump as the model to be determined based on the type of the tower electric pump and a preset electric pump database; Determine the number of electric pump stages of the tower electric pump of the to-be-determined model when the tower electric pump reaches a preset head under the conditions of each of the working conditions, preset frequency and preset flow rate; Determining whether the to-be-determined model is suitable for the tower electric pump based on the number of electric pump stages; If yes, the model to be determined is used as the model of the tower electric pump; If not, the method jumps back to the step of selecting any model from the unselected models of the tower electric pump as the model to be determined based on the type of the tower electric pump and the preset electric pump database.

7. A tower type electric pump selection device, characterized in that: include: Memory for storing computer programs; A processor, configured to implement the steps of the tower electric pump selection method according to any one of claims 1 to 5 when executing the computer program.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for selecting a tower electric pump according to any one of claims 1 to 5 are implemented.

Images