Shale gas well classification method, device, equipment and storage medium
By generating the relationship curve of the cumulative output of shale gas wells and the wellhead pressure, the problem of inability to classify shale gas wells in the early stage of mining is solved, and rapid and accurate classification is achieved, reasonable mining plans are ensured, and the mining efficiency of shale gas wells is improved.
Patent Information
- Application Number
- CN202010801165.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-08-11
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2040-08-11
AI Technical Summary
The existing technology cannot be classified according to the first-year average daily output and final recoverable reserves in the early stage of shale gas well mining, resulting in the inability to adopt reasonable mining plans in the early stage of production.
By obtaining the pressure data of each shale gas well, a relationship curve between the cumulative output and the wellhead pressure is generated. Based on the positional relationship between the pressure data of the shale gas well to be classified and the existing shale gas well, the classification is determined to achieve rapid classification.
It is necessary to accurately classify without waiting for a year, ensuring that shale gas wells can be classified quickly and accurately in the early stages of production, and then using reasonable mining plans to improve mining efficiency.
Smart Images
Figure CN114077855B_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of oil and gas exploitation, and in particular to a shale gas well classification method, device, equipment and storage medium. Background Art
[0002] In order to adopt a reasonable mining plan during the shale gas well mining process, it is necessary to classify shale gas wells. The classification of shale gas wells is usually based on production capacity and production results, such as the average daily production in the first year and the estimated ultimate recoverable reserves (Estimated Ultimate Recovery, EUR) and other indicators.
[0003] Taking the average daily output in the first year as an example, the average daily output in the first year is greater than 10×10 4 m 3 / d shale gas wells are classified as Class I wells, and the average daily production in the first year is 6×10 4 m 3 / d~10×10 4 m 3 / d interval are classified as Class II wells, and the first-year average daily production is less than 6×10 4 m 3 / d shale gas wells are classified as Class III wells.
[0004] Since this indicator is the average daily output in the first year, it can only be obtained after the production time reaches one year. Similarly, EUR also needs to be produced for about one year to be accurately calculated. Therefore, before the production time reaches one year, it is impossible to use this parameter to classify shale gas wells. Summary of the invention
[0005] The embodiments of the present disclosure provide a shale gas well classification method, device, equipment and storage medium. The technical solution is as follows:
[0006] In one aspect, a shale gas well classification method is provided, the method comprising:
[0007] Obtaining pressure data of each shale gas well, wherein the data of the shale gas well includes a corresponding relationship between cumulative production and wellhead pressure;
[0008] Based on the pressure data of each shale gas well, output a relationship curve between the cumulative production and the wellhead pressure of each type of shale gas well, wherein the wellhead pressure in the relationship curve of the first type of shale gas well is the average of the wellhead pressures of each shale gas well belonging to the first type, and the shale gas wells are divided into multiple types, and the first type is any one of them;
[0009] Obtaining pressure data of shale gas wells to be classified;
[0010] Based on the pressure data of the shale gas well to be classified, generating a relationship curve between the cumulative production and the wellhead pressure of the shale gas well to be classified;
[0011] Based on the positional relationship between the relationship curve of the shale gas well to be classified and the relationship curves of various types of shale gas wells, the category to which the shale gas well to be classified belongs is determined.
[0012] Optionally, based on the pressure data of each shale gas well, a relationship curve between the cumulative production and the wellhead pressure of each type of shale gas well is output, including:
[0013] Determine the maximum wellhead pressure corresponding to each cumulative production of the shale gas wells of the first category;
[0014] The average wellhead pressure corresponding to each cumulative production of the first type of shale gas wells is divided by the maximum wellhead pressure to obtain a normalized wellhead pressure;
[0015] Based on the corresponding relationship between the cumulative production of the first type of shale gas wells and the normalized wellhead pressure, a relationship curve between the cumulative production of the first type of shale gas wells and the wellhead pressure is fitted.
[0016] Optionally, determining the category to which the shale gas well to be classified belongs based on the positional relationship between the relationship curve of the shale gas well to be classified and the relationship curves of various types of shale gas wells includes:
[0017] Determine the distance between the relationship curve of the shale gas well to be classified and the relationship curves of each type of shale gas well, wherein the distance is the sum of the wellhead pressure differences of each cumulative production, and the wellhead pressure difference is the difference in wellhead pressures of the two curves at the same cumulative production;
[0018] When the determined minimum two distances are greater than a threshold value, the classification of the shale gas well corresponding to the relationship curve with the minimum distance is determined as the classification to which the shale gas well to be classified belongs.
[0019] Optionally, the method further comprises:
[0020] Based on the pressure data of each shale gas well, output a relationship table between the cumulative production of each type of shale gas well and the wellhead pressure range;
[0021] When the determined minimum two distances are not greater than the threshold, the category to which the shale gas well to be classified belongs is determined based on the pressure data of the shale gas well to be classified and the relationship table between the cumulative production and wellhead pressure range of each type of shale gas well.
[0022] In one aspect, a shale gas well classification device is provided, the device comprising:
[0023] A first acquisition module is configured to acquire pressure data of each shale gas well, wherein the data of the shale gas well includes a corresponding relationship between cumulative production and wellhead pressure;
[0024] an output module configured to output a relationship curve between the cumulative production and the wellhead pressure of each type of the shale gas wells based on the pressure data of each shale gas well, wherein the wellhead pressure in the relationship curve of the first type of shale gas wells is an average of the wellhead pressures of each shale gas well belonging to the first type, and the shale gas wells are divided into multiple types, and the first type is any one of them;
[0025] A second acquisition module is configured to acquire pressure data of the shale gas well to be classified;
[0026] A generating module configured to generate a relationship curve between the cumulative production and the wellhead pressure of the shale gas well to be classified based on the pressure data of the shale gas well to be classified;
[0027] The determination module is configured to determine the category to which the shale gas well to be classified belongs based on the positional relationship between the relationship curve of the shale gas well to be classified and the relationship curves of various types of shale gas wells.
[0028] Optionally, the output module is configured to determine the maximum wellhead pressure corresponding to each cumulative production of the first type of shale gas wells; divide the average wellhead pressure corresponding to each cumulative production of the first type of shale gas wells by the maximum wellhead pressure to obtain a normalized wellhead pressure; and fit a relationship curve between the cumulative production of the first type of shale gas wells and the wellhead pressure based on the corresponding relationship between the cumulative production of the first type of shale gas wells and the normalized wellhead pressure.
[0029] Optionally, the determination module is configured to determine the distance between the relationship curve of the shale gas well to be classified and the relationship curves of each type of shale gas well, the distance being the sum of the wellhead pressure differences of each cumulative production, and the wellhead pressure difference being the difference in wellhead pressures of the two curves at the same cumulative production; when the two smallest distances determined are greater than a threshold value, the classification of the shale gas well corresponding to the relationship curve with the smallest distance is determined to be the classification to which the shale gas well to be classified belongs.
[0030] Optionally, the determination module is also configured to output a relationship table between the cumulative production of each type of shale gas well and the wellhead pressure range based on the pressure data of each shale gas well; when the two smallest distances determined are not greater than a threshold value, the category to which the shale gas well to be classified belongs is determined based on the pressure data of the shale gas well to be classified and the relationship table between the cumulative production of each type of shale gas well and the wellhead pressure range.
[0031] On the one hand, an electronic device is provided, which includes a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to implement the aforementioned shale gas well classification method.
[0032] On the one hand, a computer-readable storage medium is provided, which stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to implement the aforementioned shale gas well classification method.
[0033] The beneficial effects brought by the technical solution provided by the embodiments of the present disclosure include at least:
[0034] In the embodiment of the present disclosure, based on the pressure data of a large number of shale gas wells that have been put into production, a relationship curve between the cumulative production of various types of shale gas wells and the wellhead pressure is generated, and then based on the pressure data of the shale gas wells to be classified, a relationship curve between the cumulative production of the shale gas wells to be classified and the wellhead pressure is generated. Based on the positional relationship between the relationship curve of the newly put into production shale gas well to be classified and the relationship curves of various types of shale gas wells, it can be determined which type of shale gas well the relationship curve of the shale gas well to be classified is closest to, and the classification of the relationship curve with the closest distance can be used as the classification to which the shale gas well to be classified belongs. This classification method does not require the production time to reach one year before classification. For example, after several months or even 1 month of production, classification can be performed based on the pressure data of the shale gas well. Therefore, the present disclosure provides a solution that can quickly classify shale gas wells in the early stage of production and the classification result has a high accuracy, ensuring that a reasonable mining plan can be used based on the classification of shale gas wells in the subsequent production process. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0036] Figure 1 A schematic diagram of a process of a shale gas well classification method according to an exemplary embodiment of the present disclosure;
[0037] Figure 2 A schematic diagram of a process of a shale gas well classification method according to an exemplary embodiment of the present disclosure;
[0038] Figure 3A schematic diagram showing the change in wellhead pressure of various shale gas wells with cumulative production provided in an embodiment of the present disclosure;
[0039] Figure 4 A schematic diagram showing changes in normalized pressure versus cumulative production of various shale gas wells provided in an embodiment of the present disclosure;
[0040] Figure 5 A schematic diagram showing the change in wellhead pressure of a Class Ia well with cumulative production provided in an embodiment of the present disclosure;
[0041] Figure 6 A schematic diagram showing the change in wellhead pressure of a Class Ib well with cumulative production provided in an embodiment of the present disclosure;
[0042] Figure 7 A schematic diagram showing the change in wellhead pressure of a Class II well with cumulative production provided in an embodiment of the present disclosure;
[0043] Figure 8 A schematic diagram showing the change in wellhead pressure of a Class III well with cumulative production provided in an embodiment of the present disclosure;
[0044] Fig. 9 A relationship curve between the cumulative production and wellhead pressure (before normalization) of various shale gas wells provided in the embodiments of the present disclosure;
[0045] Fig.10 The relationship curve between the cumulative production and wellhead pressure (normalized) of various shale gas wells provided in the embodiments of the present disclosure;
[0046] Fig.11 A relationship curve between the cumulative production and wellhead pressure (before normalization) of various shale gas wells provided in the embodiments of the present disclosure;
[0047] Fig.12 The relationship curve between the cumulative production and wellhead pressure (normalized) of various shale gas wells provided in the embodiments of the present disclosure;
[0048] Fig.13 A distribution diagram of the relationship curve of the shale gas wells to be classified and the relationship curves of various types of shale gas wells provided in the embodiment of the present disclosure (before normalization);
[0049] Fig.14 A schematic diagram of the distribution of the relationship curve of the shale gas wells to be classified and the relationship curves of various types of shale gas wells provided in the embodiment of the present disclosure (after normalization);
[0050] Fig.15 It is a structural block diagram of a shale gas well classification device according to an embodiment of the present disclosure;
[0051] Fig.16 It is a structural schematic diagram of an electronic device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION
[0052] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.
[0053] Figure 1 FIG. 1 is a flow chart of a shale gas well classification method according to an exemplary embodiment of the present disclosure. Figure 1 As shown, the method may include:
[0054] In step 101: pressure data of each shale gas well is obtained.
[0055] The data of the shale gas well includes the corresponding relationship between the cumulative production and the wellhead pressure. The corresponding relationship between the cumulative production and the wellhead pressure can include several cumulative productions and corresponding wellhead pressures. For example, the cumulative production can start from 0 and increase every 500,000 m 3 Take a point, for example, 500,000 m 3 1 million m 3 Of course, the value of the cumulative output can also be taken in steps of other values, such as 1 million, or not uniformly selected.
[0056] In step 102: based on the pressure data of each shale gas well, a relationship curve between the cumulative production and the wellhead pressure of each type of shale gas well is output.
[0057] Among them, the wellhead pressure in the relationship curve of the first category of shale gas wells is the average of the wellhead pressures of each shale gas well belonging to the first category. The shale gas wells are divided into multiple categories, and the first category is any one of them.
[0058] For example, shale gas wells can be divided into Class I wells, Class II wells, and Class III wells, and then step 102 generates three curves. For another example, shale gas wells can be divided into Class Ia wells, Class Ib wells, Class II wells, and Class III wells, and then step 102 generates four curves.
[0059] In step 103: pressure data of the shale gas well to be classified is obtained.
[0060] Usually, the pressure data of the shale gas wells to be classified can include the corresponding relationship between the cumulative production and the wellhead pressure for 1 to 2 months. In this case, the cumulative production is small, and a smaller step size can be used to select the cumulative production, such as 100,000 m 3 Take a point, so that enough data is selected.
[0061] In step 104: based on the pressure data of the shale gas well to be classified, a relationship curve between the cumulative production and the wellhead pressure of the shale gas well to be classified is generated.
[0062] In step 105: based on the positional relationship between the relationship curve of the shale gas well to be classified and the relationship curves of various types of shale gas wells, the category to which the shale gas well to be classified belongs is determined.
[0063] For example, the category to which the shale gas well to be classified belongs is determined based on the distance between the curves. For example, the category of the relationship curve with the closest distance can be used as the category to which the shale gas well to be classified belongs.
[0064] In the embodiment of the present disclosure, based on the pressure data of a large number of shale gas wells that have been put into production, a relationship curve between the cumulative production of various types of shale gas wells and the wellhead pressure is generated, and then based on the pressure data of the shale gas wells to be classified, a relationship curve between the cumulative production of the shale gas wells to be classified and the wellhead pressure is generated. Based on the positional relationship between the relationship curve of the newly put into production shale gas well to be classified and the relationship curves of various types of shale gas wells, it can be determined which type of shale gas well the relationship curve of the shale gas well to be classified is closest to, and the classification of the relationship curve with the closest distance can be used as the classification to which the shale gas well to be classified belongs. This classification method does not require the production time to reach one year before classification. For example, after several months or even 1 month of production, classification can be performed based on the pressure data of the shale gas well. Therefore, the present disclosure provides a solution that can quickly classify shale gas wells in the early stage of production and the classification result has a high accuracy, ensuring that a reasonable mining plan can be used based on the classification of shale gas wells in the subsequent production process.
[0065] Figure 2 FIG. 1 is a flow chart of a shale gas well classification method according to an exemplary embodiment of the present disclosure. Figure 2 As shown, the method may include:
[0066] In step 201: pressure data of each shale gas well is obtained.
[0067] The data of the shale gas well includes the corresponding relationship between the cumulative production and the wellhead pressure. The corresponding relationship between the cumulative production and the wellhead pressure can include several cumulative productions and corresponding wellhead pressures. For example, the cumulative production can start from 0 and increase every 500,000 m 3 Take a point, for example, 500,000 m 3 1 million m 3 And so on. Of course, the value of the cumulative production can also be selected with other values as the step size, such as 1 million, or not uniformly. The value of the cumulative production can be selected when measuring the wellhead pressure or when exporting data.
[0068] The step 201 may include: encrypting the data in the gas well production data management system and exporting the wellhead pressure data corresponding to the cumulative production of each shale gas well to the oilfield data management software through the database.
[0069] The database may be an Oracle database or other types of databases.
[0070] In step 202: the maximum wellhead pressure corresponding to each cumulative production of the first type of shale gas wells is determined.
[0071] Among them, the shale gas wells are divided into multiple categories, and the first category is any one of them. For example, shale gas wells can be divided into Class I wells, Class II wells and Class III wells, and the first category is any one of the three categories. For another example, shale gas wells can be divided into Class Ia wells, Class Ib wells, Class II wells and Class III wells, and the first category is any one of the four categories. Among them, the classification method is defined according to the average daily production in the first year: Class I wells with an average daily production of more than 150,000 m in the first year 3 The first-year average daily production of Class Ia wells is 100,000 to 150,000 m 3 The ones in between are Class Ib wells.
[0072] In step 203: the average wellhead pressure corresponding to each cumulative production of the first type of shale gas wells is divided by the maximum wellhead pressure to obtain a normalized wellhead pressure.
[0073] The maximum wellhead pressure value of the first type of shale gas wells may be the maximum value of the wellhead pressure in the pressure data of the first type of shale gas wells.
[0074] In this step, the wellhead pressure is averaged so that the fitted relationship curve can be used as a typical relationship curve for a type of shale gas well, so that it can be used to classify shale gas wells. Normalizing the wellhead pressure not only facilitates subsequent data processing and curve fitting. The significance of normalized pressure is that the wellhead pressure is usually the largest when it is just put into production, that is, when the cumulative production is 0, the pressure of each type of shale gas well is 1. The use of normalized pressure can explain that the degree of maintenance of the wellhead pressure of each classification is different; in the same coordinate system, the degree of decline of the relationship curves of shale gas wells of different classifications is different, so that the relationship curve can be used for classification.
[0075] In step 204: based on the corresponding relationship between the cumulative production of the first type of shale gas wells and the normalized wellhead pressure, a relationship curve between the cumulative production of the first type of shale gas wells and the wellhead pressure is fitted.
[0076] The reasons for using the relationship curve between cumulative production and wellhead pressure to classify shale gas wells in this disclosure are as follows:
[0077] It is not difficult to find the relationship curve between wellhead pressure and cumulative gas production by selecting a single gas well from the categories Ⅰ, Ⅱ, and Ⅲ. Figure 3As shown in the figure, the wellhead pressure in Class I, II, and III wells shows different decreasing trends with the increase of cumulative production. The decreasing trend of Class I wells is slower than that of Class II and III wells. In other words, the better the production effect of the well, the smaller the drop in wellhead pressure and the slower the decay when the same cumulative production is achieved. It should be noted that Figure 3 There are some points where the wellhead pressure changes suddenly in each curve. This is because when the shale gas well is overhauled or other operations are carried out, the wellhead pressure will change greatly. The present disclosure eliminates the sudden changes on the curve by averaging the wellhead pressure data of the same type. Therefore, the above-mentioned sudden changes do not affect the classification.
[0078] like Figure 4 As shown in the figure, from the relationship between normalized pressure and cumulative production, it can be seen that the pressure accumulation curves of gas wells with similar production effects are similar, showing a similar decreasing trend. Among the Class I wells, the average daily production in the first year exceeds 150,000 m 3 The trend line of the gas wells is obviously different from the average daily production of 100,000 to 150,000 m3 in the first year. 3 Therefore, among the Class I wells, the average daily production of more than 150,000 m 3 The average daily output in the first year is 100,000 to 150,000 m 3 They are Class Ia wells and Class Ib wells. Figure 5-Figure 8 As shown, Figure 5 Represents Class Ia wells, Figure 6 Represents Class Ib wells, Figure 7 Represents Class II wells and Figure 8 Represents Class III wells.
[0079] In step 204, the accumulated output is used as the horizontal axis (unit: 10,000 m 3 , or Wanfang), with the normalized wellhead pressure as the vertical coordinate, a curve of the relationship between the cumulative production and wellhead pressure of each type of shale gas well is generated.
[0080] in, Fig. 9 and Fig.11 is the relationship curve before normalization, Fig.10 and Fig.12 is the corresponding relationship curve after normalization. It can be seen that the starting points of the normalized curves are the same, which can better reflect the impact of cumulative production on wellhead pressure, making the use of this curve for shale gas well classification more accurate. In addition, Fig. 9 and Fig.10 Corresponding to the three categories, Fig.11 and Fig.12 Corresponding to 4 categories of situations.
[0081] In step 205: pressure data of the shale gas well to be classified is obtained.
[0082] Usually, the pressure data of the shale gas wells to be classified can include the corresponding relationship between the cumulative production and the wellhead pressure for 1 to 2 months. In this case, the cumulative production is small, and a smaller step size can be used to select the cumulative production, such as 100,000 m 3 Take a point, so that enough data is selected.
[0083] In step 206: based on the pressure data of the shale gas well to be classified, a relationship curve between the cumulative production and the wellhead pressure of the shale gas well to be classified is generated.
[0084] In step 207: determine the distance between the relationship curve of the shale gas well to be classified and the relationship curve of each type of shale gas well. When the two smallest distances determined are greater than a threshold, execute step 208; when the two smallest distances determined are not greater than the threshold, execute steps 209 and 210.
[0085] The distance is the sum of the wellhead pressure differences of each cumulative production, and the wellhead pressure difference is the difference in wellhead pressures between two curves at the same cumulative production.
[0086] In step 208: the classification of the shale gas well corresponding to the relationship curve with the smallest distance is determined as the classification to which the shale gas well to be classified belongs.
[0087] For example, Fig.13 , Fig.14 As shown, the pressure accumulation curve of Well H21-4 is placed in the pressure accumulation typical curve relationship diagram. Its curve is closest to the curve of Class I well, so Well H21-4 is judged to be a Class I well.
[0088] This method can be verified using the first-year average daily production method. For example, one year after H21-4 is produced, the first-year daily production is >100,000 m 3 , which is a Class I well. It can be verified that the classification based on the relationship curve is correct.
[0089] In step 209: based on the pressure data of each shale gas well, a relationship table between the cumulative production of each type of shale gas well and the wellhead pressure range is output.
[0090] As shown in Table 1, a relationship table is established based on the normalized wellhead pressure range corresponding to different cumulative production of various wells.
[0091] Table 1 Relationship between different cumulative production and wellhead pressure ranges of shale gas type I, II, and III wells in a certain area
[0092]
[0093] In step 210: based on the pressure data of the shale gas wells to be classified and the relationship table between the cumulative production and the wellhead pressure range of each type of shale gas wells, the category to which the shale gas wells to be classified belong is determined.
[0094] For example, the cumulative production of shale gas wells is 2 million m 3 When the pressure is 0.7, based on Table 1, it can be determined that the shale gas well is a Class I well.
[0095] In addition, after the classification step of step 208 is performed, verification can also be performed through steps 209 and 210. When the verified classification is consistent, the classification is determined to be adopted, otherwise, the classification is re-performed, for example, checking whether the data is wrong, etc. When the data is wrong, the correct data is used for re-classification.
[0096] The accuracy of the method provided in the embodiment of the present disclosure is explained below by verification:
[0097] 24 gas wells put into production in the past two years were classified according to the relationship between the average daily production in the first year and the typical curve of pressure accumulation. There are 13 Class I wells and 11 Class II wells. The results of the two are consistent, as shown in Table 2, indicating that the classification of gas wells based on the above relationship curve is accurate and can be classified earlier.
[0098] Table 2 Classification statistics of gas wells in a shale gas field
[0099]
[0100] The following are embodiments of the device disclosed herein, which can be used to execute the method embodiments disclosed herein. For details not disclosed in the device embodiments disclosed herein, please refer to the method embodiments disclosed herein.
[0101] Fig.15 FIG. 1 is a structural block diagram of a shale gas well classification device according to an embodiment of the present disclosure. The device can be implemented as all or part of an electronic device. Fig.15 As shown, the device includes: a first acquisition module 301, an output module 302, a second acquisition module 303, a generation module 304 and a determination module 305.
[0102] The first acquisition module 301 is configured to acquire pressure data of each shale gas well, wherein the data of the shale gas well includes a corresponding relationship between the cumulative production and the wellhead pressure;
[0103] The output module 302 is configured to output a relationship curve between the cumulative production and the wellhead pressure of each type of the shale gas wells based on the pressure data of each shale gas well, wherein the wellhead pressure in the relationship curve of the first type of shale gas wells is the average of the wellhead pressures of each shale gas well belonging to the first type, and the shale gas wells are divided into multiple types, and the first type is any one of them;
[0104] The second acquisition module 303 is configured to acquire pressure data of the shale gas well to be classified;
[0105] A generating module 304 is configured to generate a relationship curve between the cumulative production and the wellhead pressure of the shale gas well to be classified based on the pressure data of the shale gas well to be classified;
[0106] The determination module 305 is configured to determine the category to which the shale gas well to be classified belongs based on the positional relationship between the relationship curve of the shale gas well to be classified and the relationship curves of various types of shale gas wells.
[0107] Optionally, the output module 302 is configured to determine the maximum wellhead pressure corresponding to each cumulative production of the first type of shale gas wells; divide the average wellhead pressure corresponding to each cumulative production of the first type of shale gas wells by the maximum wellhead pressure to obtain a normalized wellhead pressure; and fit a relationship curve between the cumulative production of the first type of shale gas wells and the wellhead pressure based on the corresponding relationship between the cumulative production of the first type of shale gas wells and the normalized wellhead pressure.
[0108] Optionally, the determination module 305 is configured to determine the distance between the relationship curve of the shale gas well to be classified and the relationship curves of each type of shale gas well, the distance being the sum of the wellhead pressure differences of each cumulative production, and the wellhead pressure difference being the difference in wellhead pressures of the two curves at the same cumulative production; when the two smallest distances determined are greater than a threshold value, the classification of the shale gas well corresponding to the relationship curve with the smallest distance is determined to be the classification to which the shale gas well to be classified belongs.
[0109] Optionally, the determination module 305 is also configured to output a relationship table between the cumulative production of each type of shale gas well and the wellhead pressure range based on the pressure data of each shale gas well; when the two smallest distances determined are not greater than a threshold value, the category to which the shale gas well to be classified belongs is determined based on the pressure data of the shale gas well to be classified and the relationship table between the cumulative production of each type of shale gas well and the wellhead pressure range.
[0110] The embodiment of the present disclosure also provides an electronic device, which may be the aforementioned terminal or server. The electronic device may include a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set, or an instruction set, and the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by the processor to implement the aforementioned method.
[0111] Fig.16 is a schematic diagram of the structure of an electronic device provided by an embodiment of the present disclosure. Fig.16The electronic device 400 includes a central processing unit (CPU) 401, a system memory 404 including a random access memory (RAM) 402 and a read-only memory (ROM) 403, and a system bus 405 connecting the system memory 404 and the central processing unit 401. The electronic device 400 also includes a basic input / output system (I / O system) 406 for helping to transfer information between various components in the computer, and a large-capacity storage device 407 for storing an operating system 413, application programs 414, and other program modules 415.
[0112] The basic input / output system 406 includes a display 408 for displaying information and an input device 409 such as a mouse and a keyboard for user inputting information. The display 408 and the input device 409 are connected to the central processing unit 401 through an input / output controller 410 connected to the system bus 405. The basic input / output system 406 may also include an input / output controller 410 for receiving and processing inputs from a plurality of other devices such as a keyboard, a mouse, or an electronic stylus. Similarly, the input / output controller 410 also provides output to a display screen, a printer, or other types of output devices.
[0113] The mass storage device 407 is connected to the central processing unit 401 through a mass storage controller (not shown) connected to the system bus 405. The mass storage device 407 and its associated computer-readable media provide non-volatile storage for the electronic device 400. That is, the mass storage device 407 may include a computer-readable medium (not shown) such as a hard disk or a CD-ROM drive.
[0114] Without loss of generality, computer readable media may include computer storage media and communication media. Computer storage media include volatile and non-volatile, removable and non-removable media implemented by any method or technology for storing information such as computer readable instructions, data structures, program modules or other data. Computer storage media include RAM, ROM, Erasable Programmable Read Only Memory (EPROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other solid-state storage technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, cassette, magnetic tape, disk storage or other magnetic storage devices. Of course, those skilled in the art will know that computer storage media are not limited to the above. The above-mentioned system memory 404 and mass storage device 407 can be collectively referred to as memory.
[0115] According to various embodiments of the present disclosure, the electronic device 400 can also be connected to a remote computer on the network through a network such as the Internet. That is, the electronic device 400 can be connected to the network 412 through the network interface unit 411 connected to the system bus 405, or the network interface unit 411 can also be used to connect to other types of networks or remote computer systems (not shown).
[0116] The memory also includes one or more programs, which are stored in the memory and configured to be executed by the CPU. The CPU 401 implements the above-mentioned shale gas well classification method by executing the one or more programs.
[0117] Those skilled in the art will understand that Fig.16 The structure shown in the figure does not constitute a limitation on the electronic device 400, and may include more or less components than those shown in the figure, or combine some components, or adopt a different component arrangement.
[0118] The present disclosure also provides a computer-readable storage medium, which stores at least one instruction, at least one program, code set or instruction set, and the at least one instruction, at least one program, code set or instruction set is loaded and executed by the processor to implement the method as described above. For example, the computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.
[0119] An embodiment of the present disclosure also provides a computer program product, which stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to implement the method as described above.
[0120] It should be understood that the "plurality" mentioned in this article refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.
[0121] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.
[0122] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.
Claims
1. A shale gas well classification method, characterized in that: The method comprises: Obtaining pressure data of each shale gas well, wherein the data of the shale gas well includes a corresponding relationship between cumulative production and wellhead pressure; Based on the pressure data of each shale gas well, output a relationship curve between the cumulative production and the wellhead pressure of each type of shale gas well, wherein the wellhead pressure in the relationship curve of the first type of shale gas well is the average of the wellhead pressures of each shale gas well belonging to the first type, and the shale gas wells are divided into multiple types, and the first type is any one of them; Obtaining pressure data of shale gas wells to be classified; Based on the pressure data of the shale gas well to be classified, generating a relationship curve between the cumulative production and the wellhead pressure of the shale gas well to be classified; Based on the positional relationship between the relationship curve of the shale gas well to be classified and the relationship curves of various types of shale gas wells, the category to which the shale gas well to be classified belongs is determined.
2. The method according to claim 1, characterized in that Based on the pressure data of each shale gas well, a relationship curve between the cumulative production of each type of shale gas well and the wellhead pressure is output, including: Determine the maximum wellhead pressure corresponding to each cumulative production of the shale gas wells of the first category; The average wellhead pressure corresponding to each cumulative production of the first type of shale gas wells is divided by the maximum wellhead pressure to obtain a normalized wellhead pressure; Based on the corresponding relationship between the cumulative production of the first type of shale gas wells and the normalized wellhead pressure, a relationship curve between the cumulative production of the first type of shale gas wells and the wellhead pressure is fitted.
3. The method according to claim 1 or 2, characterized in that: Determining the category to which the shale gas well to be classified belongs based on the positional relationship between the relationship curve of the shale gas well to be classified and the relationship curves of various types of shale gas wells, includes: Determine the distance between the relationship curve of the shale gas well to be classified and the relationship curves of each type of shale gas well, wherein the distance is the sum of the wellhead pressure differences of each cumulative production, and the wellhead pressure difference is the difference in wellhead pressures of the two curves at the same cumulative production; When the determined minimum two distances are greater than a threshold value, the classification of the shale gas well corresponding to the relationship curve with the minimum distance is determined as the classification to which the shale gas well to be classified belongs.
4. The method according to claim 3, characterized in that The method further comprises: Based on the pressure data of each shale gas well, output a relationship table between the cumulative production of each type of shale gas well and the wellhead pressure range; When the determined minimum two distances are not greater than the threshold, the category to which the shale gas well to be classified belongs is determined based on the pressure data of the shale gas well to be classified and the relationship table between the cumulative production and wellhead pressure range of each type of shale gas well.
5. A shale gas well classification device, characterized in that: The device comprises: A first acquisition module is configured to acquire pressure data of each shale gas well, wherein the data of the shale gas well includes a corresponding relationship between cumulative production and wellhead pressure; an output module configured to output a relationship curve between the cumulative production and the wellhead pressure of each type of the shale gas wells based on the pressure data of each shale gas well, wherein the wellhead pressure in the relationship curve of the first type of shale gas wells is an average of the wellhead pressures of each shale gas well belonging to the first type, and the shale gas wells are divided into multiple types, and the first type is any one of them; A second acquisition module is configured to acquire pressure data of the shale gas well to be classified; A generating module configured to generate a relationship curve between the cumulative production and the wellhead pressure of the shale gas well to be classified based on the pressure data of the shale gas well to be classified; The determination module is configured to determine the category to which the shale gas well to be classified belongs based on the positional relationship between the relationship curve of the shale gas well to be classified and the relationship curves of various types of shale gas wells.
6. The device according to claim 5, characterized in that The output module is configured to determine the maximum wellhead pressure corresponding to each cumulative production of the first type of shale gas wells; divide the average wellhead pressure corresponding to each cumulative production of the first type of shale gas wells by the maximum wellhead pressure to obtain a normalized wellhead pressure; Based on the corresponding relationship between the cumulative production of the first type of shale gas wells and the normalized wellhead pressure, a relationship curve between the cumulative production of the first type of shale gas wells and the wellhead pressure is fitted.
7. The device according to claim 5 or 6, characterized in that The determination module is configured to determine the distance between the relationship curve of the shale gas well to be classified and the relationship curves of each type of shale gas well, wherein the distance is the sum of the wellhead pressure differences of each cumulative production, and the wellhead pressure difference is the difference in wellhead pressures of the two curves at the same cumulative production; when the two smallest distances determined are greater than a threshold value, the classification of the shale gas well corresponding to the relationship curve with the smallest distance is determined to be the classification to which the shale gas well to be classified belongs.
8. The device according to claim 7, characterized in that The determination module is also configured to output a relationship table between the cumulative production of each type of shale gas well and the wellhead pressure range based on the pressure data of each shale gas well; when the two smallest distances determined are not greater than a threshold value, the category to which the shale gas well to be classified belongs is determined based on the pressure data of the shale gas well to be classified and the relationship table between the cumulative production of each type of shale gas well and the wellhead pressure range.
9. An electronic device, characterized in that: The electronic device includes a processor and a memory, the memory storing at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to implement the method as described in any one of claims 1 to 4.
10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by a processor to implement the method according to any one of claims 1 to 4.