Typical production curve construction method and device, electronic equipment and storage medium
By conducting uncertainty analysis of the shale gas well area, dividing well groups and screening similar single-well production curves, the problem of inaccurate calculation of reserves in the existing technology is solved, and a more accurate reserve evaluation is achieved.
Patent Information
- Application Number
- CN202310806607.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-01
- Publication Date
- 2025-01-03
AI Technical Summary
When establishing a typical production curve in the shale gas well area, the existing technology fails to effectively classify the production rules of a single well, resulting in a far different rate of calculated technical recoverable reserves from the actual recoverable reserves, especially in the calculation of P10 reserves. Conventional normalized treatment methods are affected by super high yield wells and cannot fully reflect the production rules of the well group.
Using an uncertainty analysis method, single wells in the well area were divided into well groups with stable production periods and no stable production periods. The PK reserves of each group were calculated using the probability method, and a single well production curve similar to the calculation results were screened. , draw a typical production curve through normalization methods and initial production, stable production period and decreasing rate.
This method can more accurately reflect the production dynamics of the well group, ensure that the technically recoverable reserves obtained from the typical production curve are basically consistent with the actual recoverable reserves, and improve the accuracy of reserve evaluation.
Smart Images
Figure CN119249192A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of recoverable reserves calibration of gas reservoirs, and in particular to a typical production curve construction method, device, electronic equipment and storage medium. Background Art
[0002] Shale gas is affected by many factors such as geological conditions, engineering technology and transformation effects. The production rules of shale gas single wells vary greatly, and the uncertainty of recoverable reserves is large. When grasping the technical recoverable reserves of single wells in new wells and the early stage of production, it is often necessary to determine three reserves with different reliability levels, namely P10, P50, and P90 reserves (referring to the reliability of the calculated final reserves of 10%, 50% and 90%). The usual method is to analyze the production rules of old wells in the study area, establish typical production curves under three different reliability levels of P10, P50, and P90, and thus obtain the corresponding single well technical recoverable reserves.
[0003] At present, the conventional method for establishing a typical production curve is the "normalization processing" method. The following is an example of establishing a typical production curve for P10 reserves to illustrate the normalization processing method. The specific steps are as follows:
[0004] 1. Obtain the technically recoverable reserves of each well for all old wells in the study area. The top 10% of the wells in terms of technically recoverable reserves are selected as the P10 well group (similarly, P50 and P90 are the top 50% and 90% of the well groups in terms of technically recoverable reserves, respectively).
[0005] 2. There are n monthly production curves of a single well in the P10 well group. The production month of each well is set to 1, and the last production node of the well with the longest production time is the mth month.
[0006] 3. Draw the production curve of each well in the same rectangular coordinate system, and set the monthly production of the jth well in the i-th month to be X ij , for X i1 , X i2 , …X in Take the arithmetic mean and get X i *, X i * =(X i1 +X i2 +X i3 +…+X ip ) / p, where j = 1, 2…p, p is the total number of wells opened in the i-th month, and p ≤ n;
[0007] 4. X1 * , X2 * …X im * The monthly production of a single well is plotted as K*The corresponding typical production curve is used to calculate the P10 technically recoverable reserves of the well area.
[0008] For obtaining typical production curves of reserves with different reliability levels, conventional normalization methods have at least the following two problems:
[0009] 1. The conventional "normalization processing" method does not classify according to the production law of individual wells. If some wells in the well group have a stable production period, using this method to obtain the typical production curve cannot fully reflect the actual production law of the well group. It is only applicable to all single wells in the well group using open blowdown and pressure reduction production method, and the production directly decreases after production.
[0010] 2. The technical recoverable reserves calculated by the typical production curve obtained by the conventional "normalization processing" method may be far from the actual recoverable reserves of the well group. Especially when obtaining the technical recoverable reserves with a reliability of 10%, that is, P10, since the single-well production of the top 10% wells with technical recoverable reserves varies greatly, and the conventional "normalization processing" method only performs arithmetic averaging of the production of each node, the obtained value may be affected by a particularly high-yield well, and the technical recoverable reserves obtained by the typical well curve are higher than the actual value. Summary of the invention
[0011] In view of this, the present application provides a typical production curve construction method, device, electronic device and storage medium to help solve the problems existing in the prior art.
[0012] In a first aspect, an embodiment of the present application provides a typical production curve construction method based on uncertainty analysis, comprising:
[0013] Apply the decline method to all single wells in the well area to obtain the single well technical recoverable reserves of each well;
[0014] According to the stable production status of a single well, all wells in the well area are divided into well group A and well group B, wherein well group A is a well without an obvious stable production period, and well group B is a well with a stable production period;
[0015] Use the probability method to calculate the P of the well group A K Reserves and P of well group B K reserves;
[0016] Select the top K% single wells in terms of technically recoverable reserves in well group A and well group B respectively, and obtain the reserves of well group A. K Hejing Group B K ;
[0017] In the well group A K The technically recoverable reserves of a single well within the screening and the P of the well group A K Single wells with similar reserves are grouped as well group A. K *, in the well group BK The technical recoverable reserves of the single well within the screening and the P of the well group B K Single wells with similar reserves are grouped as well group B. K *;
[0018] Get the well group A K * Corresponding typical production curve and the well group B K *Corresponding typical production curve.
[0019] In a possible implementation, the obtaining of the well group A K *The corresponding typical production curve includes:
[0020] The normalization method is used to obtain the well group A K *Corresponding typical production curve.
[0021] In a possible implementation, the normalization method is used to obtain the well group A K *The corresponding typical production curve includes:
[0022] Set the well group A K *The production month of each well is 1, and the last production month of the well with the longest production time is m;
[0023] Assume that the monthly production of the jth well in the i-th month is X ij , for X i1 , X i2 , …X in Take the arithmetic mean and get X i * , X i * =(X i1 +X i2 +X i3 +…+X ip ) / p, where j = 1, 2…p, p is the total number of wells opened in the i-th month, and p ≤ n;
[0024] With X1 * , X2 * …X im * The monthly production of a single well is plotted as K *Corresponding typical production curve.
[0025] In a possible implementation, the well group B is obtained K *The corresponding typical production curve includes:
[0026] Obtain the well group B K *The initial production, plateau period and decline rate of each well;
[0027] Draw the well group B according to the initial production, stable production period and decline rate K *Corresponding typical production curve.
[0028] In a possible implementation, the calculation formula for the initial yield is: * =(q1+q2+q3+…q n ) / n, n is the well group B 10 * The number of wells opened, q i Well Group B 10 * The initial production of the ith well;
[0029] The calculation formula of the stable production period is: * =(t1+t2+t3+…t n ) / n, n is the well group B 10 * Number of wells opened, t i Well Group B 10 * The stable production period of the i-th well;
[0030] The calculation formula of the decline rate is: * =(d1+d2+d3+…d n ) / n, n is the well group B 10 * Number of wells opened, t i Well Group B 10 * The decline rate of the ith well.
[0031] In a possible implementation, the method further includes:
[0032] A rationality check is performed on the typical production curve to eliminate abnormal points in the typical production curve.
[0033] In one possible implementation, K=10, 50, and 90.
[0034] In a second aspect, an embodiment of the present application provides a typical production curve construction device based on uncertainty analysis, comprising:
[0035] The module for obtaining the technically recoverable reserves of a single well is used to obtain the technically recoverable reserves of each well using the decreasing method for all the wells in the well area;
[0036] A well group division module is used to divide all wells in the well area into well group A and well group B according to the stable production status of a single well, wherein the well group A is the well without an obvious stable production period, and the well group B is the well with a stable production period;
[0037] P KThe reserve calculation module is used to calculate the P of the well group A using the probability method. K Reserves and P of well group B K reserves;
[0038] The first well group screening module is used to select the single wells with the top K% of single well technical recoverable reserves in well group A and well group B respectively, and obtain the well group A K Hejing Group B K ;
[0039] The second well group screening module is used to K The technically recoverable reserves of a single well within the screening and the P of the well group A K Single wells with similar reserves are grouped as well group A. K *, in the well group B K The technical recoverable reserves of the single well within the screening and the P of the well group B K Single wells with similar reserves are grouped as well group B. K *;
[0040] Typical production curve drawing module, used to obtain the well group A K * Corresponding typical production curve and the well group B K *Corresponding typical production curve.
[0041] In a third aspect, an embodiment of the present application provides an electronic device, including:
[0042] processor;
[0043] Memory;
[0044] And a computer program, wherein the computer program is stored in the memory, and the computer program includes instructions, and when the instructions are executed by the processor, the electronic device executes any one of the methods described in the first aspect.
[0045] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute any one of the methods described in the first aspect.
[0046] In the embodiment of the present application, the single wells are classified according to whether there is a stable production period, and the single well production curves with recoverable reserves close to the established single well are selected using the established single well technical recoverable reserves as a constraint, and the typical production curve is obtained using the improved method. The typical production curve thus obtained can not only reflect the production dynamics of the well group, but also ensure that the technical reserves obtained using the typical curve are consistent with the actual exploitable reserves. BRIEF DESCRIPTION OF THE DRAWINGS
[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0048] Figure 1 A schematic diagram of a typical production curve obtained by conventional normalization processing is provided in an embodiment of the present application;
[0049] Figure 2 A schematic diagram of a typical production curve construction method based on uncertainty analysis provided in an embodiment of the present application;
[0050] Figure 3 A schematic diagram of a typical production curve obtained by conventional methods provided in an embodiment of the present application;
[0051] Figure 4 Another typical production curve schematic diagram obtained by conventional methods provided in the embodiment of the present application;
[0052] Figure 5 A schematic diagram of a typical production curve obtained by an improved method provided in an embodiment of the present application;
[0053] Figure 6 A schematic diagram for comparing typical production curves obtained by a conventional method and an improved method provided in an embodiment of the present application;
[0054] Figure 7 A EUR table of a single well in different well areas provided in an embodiment of the present application;
[0055] Figure 8 A P10, P50, and P90 reserve table for different well areas provided in an embodiment of the present application;
[0056] Fig. 9 A schematic diagram of a typical production curve for different reserve probability distributions in a main area provided in an embodiment of the present application;
[0057] Fig.10 A schematic diagram of a typical production curve for different probability distributions of reserves in the East Region provided in an embodiment of the present application;
[0058] Fig.11 A schematic diagram of a typical production curve for different probability distributions of reserves in the western region provided in an embodiment of the present application;
[0059] Fig.12 A schematic diagram of a typical production curve for different reserve probability distributions in the southwest region provided in an embodiment of the present application;
[0060] Fig.13 A structural block diagram of a typical production curve construction device based on uncertainty analysis is also provided in this application;
[0061] Fig.14 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION
[0062] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.
[0063] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0064] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.
[0065] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.
[0066] When the conventional typical production curve uses the "normalization processing" method, the production curve of each single well is simply averaged. On the one hand, for most well groups with stable production periods, the typical production curve drawn does not have a stable production period because some wells do not have a stable production period; when single wells with different stable production periods use this method to construct typical production curves, the stable production period of the typical production curve is consistent with the stable production period of the well with the shortest stable production period, which is obviously inconsistent with the production law of most wells. On the other hand, the production curves of all wells in the well group are used to obtain the typical production curve, and the technical recoverable reserves of a single well obtained by the typical production curve are quite different from the actual reserves.
[0067] In view of the above situation, the present application combines the probability method to establish typical production curves with different reliability levels according to the classification of the stable production period conditions, and uses the probability method to calculate the single well EUR (i.e. P10, P50, P90) under different reliability levels, and uses this as a constraint to screen the production curve, and then establish a typical production curve to ensure that the technical recoverable reserves obtained by the typical production curve are basically consistent with the actual recoverable reserves. The typical production curve chart and technical recoverable reserves finally established can be used to guide the calibration of recoverable reserves of new wells in oil and gas reservoirs. The typical production curve obtained by this method can not only reflect the production dynamics of the well group, but also ensure that the technical reserves obtained by the typical production curve are consistent with the actual technical recoverable reserves. The technical solution provided in the embodiment of the present application is described in detail below.
[0068] See also Figure 2 , is a flow chart of a typical production curve construction method based on uncertainty analysis provided in an embodiment of the present application. Figure 2 As shown, it mainly includes the following steps.
[0069] Step S201: Apply the decreasing method to all single wells in the well area to obtain the single well technical recoverable reserves of each well.
[0070] Step S202: all wells in the well area are divided into well group A and well group B according to the stable production status of the single well, where well group A is the wells without obvious stable production period and well group B is the wells with stable production period.
[0071] Step S203: Calculate the P of well group A using the probability method K Reserves and P of well group B K Reserves.
[0072] Among them, P k The reserve represents the result with a reliability of K%. For example, when K is 10, the probability method is used to calculate the P10 reserves of well group A and the P10 reserves of well group B respectively; when K is 50, the probability method is used to calculate the P50 reserves of well group A and the P50 reserves of well group B respectively; when K is 90, the probability method is used to calculate the P90 reserves of well group A and the P90 reserves of well group B respectively.
[0073] Step S204: Select the single wells with the top K% of single well technical recoverable reserves in well group A and well group B respectively, and obtain the K Hejing Group B K .
[0074] For example, when K is 10, the top 10% of single wells in terms of technically recoverable reserves are selected from well group A and well group B, respectively, to obtain 10 Hejing Group B 10; When K is 50, select the top 50% single wells in terms of single well technical recoverable reserves in well group A and well group B respectively, and obtain the 50 Hejing Group B 50 ; When K is 90, select the top 90% single wells in terms of single well technical recoverable reserves in well group A and well group B, and obtain 90 Hejing Group B 90 .
[0075] Step S205: In well group A K The technical recoverable reserves of a single well in the internal screening and the P of well group A K Single wells with similar reserves are grouped as well group A. K *, in well group B K The technical recoverable reserves of the internal screening single well and the P of well group B K Single wells with similar reserves are grouped as well group B. K *.
[0076] For example, when K is 10, in well group A 10 The single wells with recoverable reserves close to the P10 reserves of well group A are selected as well group A. 10 *, in well group B 10 The single wells with recoverable reserves close to the P10 reserves of well group B are selected as well group B. 10 *; When K is 50, in well group A 50 The single wells with recoverable reserves close to the P50 reserves of well group A are selected as well group A. 50 *, in well group B 50 The single wells with recoverable reserves close to the P50 reserves of well group B are selected as well group B. 50 *; When K is 90, in well group A 90 The single wells with recoverable reserves close to the P90 reserves of well group A are selected as well group A. 90 *, in well group B 90 The single wells with recoverable reserves close to the P90 reserves of well group B are selected as well group B. 90 *.
[0077] It should be pointed out that the “recoverable reserves of a single well and the P K "Single wells with similar reserves" refers to single wells with technically recoverable reserves close to P of well group A. K In the specific implementation, a threshold can be set to compare the technically recoverable reserves of a single well with the P of well group A. K The difference in reserves is compared with the threshold. If the difference between the two is less than or equal to the threshold, it is determined to be the P of well group A. KIf the difference between the two is greater than the threshold, it is determined that it is not the P of well group A. K Single wells with similar reserves.
[0078] Step S206: Obtain the well group A K *Corresponding typical production curve and well group B K **Corresponding typical production curve.
[0079] In a possible implementation, find the well group A K * The corresponding typical production curve includes: using the normalization method to obtain the well group A K *Corresponding typical production curve. Specifically, set well group A K *The production month of each well is 1, and the last production month of the well with the longest production time is m; let the monthly production of the jth well in the i-th month be X ij , for X i1 , X i2 , …X in Take the arithmetic mean and get X i * , X i * =(X i1 +X i2 +X i3 +…+X ip ) / p, where j = 1, 2…p, p is the total number of wells opened in the i-th month, and p ≤ n; X1 * , X2 * …X im * For the monthly production of a single well, plot well group A K *Corresponding typical production curve.
[0080] In a possible implementation, find well group B K * The corresponding typical production curve includes: obtaining well group B K * The initial production, stable production period and decline rate of each well in; Draw the well group B based on the initial production, stable production period and decline rate K *Corresponding typical production curve. In specific implementation, the initial output, stable production period and decline rate can be obtained by the following calculation methods respectively.
[0081] The calculation formula for initial output is: q * =(q1+q2+q3+…q n ) / n, n is the well group B 10 * The number of wells opened, q i Well Group B 10 ** The initial production of the ith well;
[0082] The calculation formula for stable production period is: * =(t1+t2+t3+…t n ) / n, n is the well group B 10 ** Number of wells opened, t i Well Group B 10 ** The stable production period of the i-th well;
[0083] The calculation formula of decline rate is: * =(d1+d2+d3+…d n ) / n, n is the well group B 10 ** Number of wells opened, t i Well Group B 10 ** The decline rate of the ith well.
[0084] The typical curve obtained by the improved method of the embodiment of the present application can better reflect the production trend of the well group, which is mainly manifested in the following three aspects:
[0085] (1) Classification: The well groups without stable production period and with stable production period are divided into two categories. Assume that there are 100 wells in the well group, 99 wells have stable production period, and only 1 well has no stable production period and directly decreases. The stable production curve obtained by conventional methods has no stable production period and obviously cannot represent the production trend of the well group. Figure 3 The improved method of the embodiment of the present application establishes typical curves for the period with stable production and the period without stable production, which can better represent the production law of the single well of this well group.
[0086] (2) Obtaining a typical production curve with a stable production period: For single wells with different stable production periods, the typical production curve obtained by conventional methods has a stable production period that is consistent with the single well with the shortest stable production period, which cannot represent the stable production trend of the entire well group. Figure 4 The improved method for obtaining the stable production period directly averages the stable production period of each well, which can better represent the average stable production time of the well group, as shown in Figure 5 shown.
[0087] (3) When screening single well curves, the P calculated by probability method was used as a reference. K Reserves: In P K In a well group, when selecting a single well curve to establish a typical production curve, the P calculated by the probability method is K The single well curves with similar single well technical recoverable reserves are selected based on the reserves, and the typical production curve is obtained based on this. This method discards single wells with too high or too low single well recoverable reserves, ensuring that the technical recoverable reserves of the typical production curve match the actual technical recoverable reserves. Figure 6 shown.
[0088] In a possible implementation, in the above step S205, well group B is obtained. K Finally, well group B can be classified according to the stable production period and decline rate. K *The individual wells in group B were further screened. K * Remove the single well with a large difference in stable production period and decline rate compared with other wells, and obtain well group B k **. For example, well group B can be obtained K *Then compare the stable production period of each well with the stable production period average. If the stable production period of a well is significantly different from the stable production period average, then the well is determined to be the well with the largest difference in stable production period relative to other wells. Similarly, the stable production period of well group B can be obtained. K *Then compare the decline rate of each well with the decline rate mean. If the decline rate of a well is significantly different from the decline rate mean, then determine that the well is the well with the largest decline rate difference relative to other wells. k **Later, in the above step S206, obtain well group B k **Corresponding typical production curve.
[0089] In summary, in the embodiments of the present application, when obtaining the typical well curve of a single well with a stable production period, the single wells whose stable production period and decline rate are much higher or lower than that of most wells are removed.
[0090] In order to illustrate the application of the present invention in the field of shale gas reserve assessment, a typical production curve chart is established using the single well production curve of the well group of Sinopec's actual oil and gas fields to test the effectiveness and adaptability of the method.
[0091] Specifically, taking a listed shale gas block of Sinopec as an example, it is divided into four areas according to the production status of single wells and the high and low EUR of single wells, namely the main area, the west area, the east area, and the southwest area. Among them, the gas wells in the main area, the west area, and the east area have obvious stable production periods, while the wells in the southwest area do not have obvious stable production periods. The specific steps are as follows:
[0092] (1) First, the EUR of a single well in different well areas is calculated using the decreasing method, such as Figure 7 It should be pointed out that Figure 7 Only some of the technically recoverable reserves of individual wells in different zones are shown.
[0093] (2) Use the probability method to calculate the P10, P50, and P90 reserves of different well areas, such as Figure 8 shown.
[0094] (3) Taking P10 as an example, a single well production curve is selected to establish a typical production curve. Specifically, the typical production curve of the well group without stable production period is taken as an example in the southwest area, and the typical production curve of the well group with stable production period is taken as an example in the main area. The technically recoverable reserves of single wells in the southwest area and the main area are ranked from large to small, and divided into the top 10%, 50%, and 90% well groups. The single wells are further screened by comparing the P10, P50, and P90 reserves of the southwest area and the main area, and single wells similar to them are selected.
[0095] (4) Establish typical production curves for different well areas. Specifically, for the well groups in the east area, west area and main area, there are obvious stable production periods. Draw dynamic production curves for the single wells selected in step (3), and calculate the initial production, stable production period and decline rate of each single well in each well area. Calculate the average value of the initial production, stable production period and decline rate of each single well, and establish a typical curve template, such as Figure 9-11 As shown. For the well groups in the southwest region that do not have a stable production period, the dynamic production curve is drawn for the single well selected in step (3), and the conventional "normalization processing" method is directly applied, that is, the arithmetic average of the monthly production curves of each single well is taken to obtain the production at the corresponding time node, thereby establishing a typical production curve, as shown in Fig.12 shown.
[0096] In summary, in the embodiment of the present application, the single wells are classified according to whether there is a stable production period, and the single well production curves with recoverable reserves close to the established single well are screened using the established single well technical recoverable reserves as a constraint, and the improved method is used to obtain the typical production curve. The typical production curve thus obtained can not only reflect the production dynamics of the well group, but also ensure that the technical reserves obtained using the typical curve are consistent with the actual exploitable reserves.
[0097] Corresponding to the above-mentioned embodiments, the present application also provides a typical production curve construction device based on uncertainty analysis.
[0098] See also Fig.13 , which is a structural block diagram of a typical production curve construction device based on uncertainty analysis provided by this application. Fig.13 As shown, it mainly includes the following modules.
[0099] The single well technical recoverable reserves calculation module 1301 is used to calculate the single well technical recoverable reserves of each well using the reduction method for all single wells in the well area;
[0100] The well group division module 1302 is used to divide all the wells in the well area into well group A and well group B according to the stable production status of the single well, wherein the well group A is the wells without obvious stable production period, and the well group B is the wells with stable production period;
[0101] P K The reserve calculation module 1303 is used to calculate the P of the well group A by using the probability method.K Reserves and P of well group B K reserves;
[0102] The first well group screening module 1304 is used to select the single wells with the top K% of single well technical recoverable reserves in well group A and well group B respectively, and obtain the well group A. K Hejing Group B K ;
[0103] The second well group screening module 1305 is used to select the well group A K The technically recoverable reserves of a single well within the screening and the P of the well group A K Single wells with similar reserves are grouped as well group A. K *, in the well group B K The technical recoverable reserves of the single well within the screening and the P of the well group B K Single wells with similar reserves are grouped as well group B. K *;
[0104] Typical production curve drawing module 1306 is used to obtain the well group A K * Corresponding typical production curve and the well group B K *Corresponding typical production curve.
[0105] It should be pointed out that the specific contents involved in the embodiments of the present application can be found in the description of the above method embodiments, and for the sake of brevity, they will not be repeated here.
[0106] Corresponding to the above embodiment, an embodiment of the present application further provides an electronic device.
[0107] See also Fig.14 , is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Fig.14 As shown, the electronic device 1400 may include: a processor 1401, a memory 1402 and a communication unit 1403. These components communicate through one or more buses. Those skilled in the art can understand that the electronic device structure shown in the figure does not constitute a limitation on the embodiments of the present application. It can be a bus structure or a star structure, and can also include more or fewer components than shown in the figure, or combine certain components, or arrange components differently.
[0108] The communication unit 1403 is used to establish a communication channel so that the electronic device can communicate with other devices.
[0109] The processor 1401 is the control center of the electronic device. It uses various interfaces and lines to connect various parts of the entire electronic device. It runs or executes software programs and / or modules stored in the memory 1402, and calls data stored in the memory to perform various functions of the electronic device and / or process data. The processor can be composed of an integrated circuit (IC), for example, it can be composed of a single packaged IC, or it can be composed of multiple packaged ICs with the same or different functions. For example, the processor 1401 can include only a central processing unit (CPU). In the embodiment of the present application, the CPU can be a single computing core or multiple computing cores.
[0110] Memory 1402 is used to store execution instructions of processor 1401. Memory 1402 can be implemented by any type of volatile or non-volatile storage device or a combination of them, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.
[0111] When the execution instructions in the memory 1402 are executed by the processor 1401 , the electronic device 1400 is enabled to execute part or all of the steps in the above method embodiment.
[0112] Corresponding to the above embodiment, the embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium may store a program, wherein when the program is running, the device where the computer-readable storage medium is located may be controlled to perform some or all of the steps in the above method embodiment. In a specific implementation, the computer-readable storage medium may be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM).
[0113] Corresponding to the above-mentioned embodiment, the embodiment of the present application further provides a computer program product, which includes executable instructions. When the executable instructions are executed on a computer, the computer executes some or all of the steps in the above-mentioned method embodiment.
[0114] In the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.
[0115] Those of ordinary skill in the art will appreciate that the various units and algorithm steps described in the embodiments disclosed herein can be implemented in a combination of electronic hardware, computer software, and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.
[0116] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.
[0117] In several embodiments provided in the present application, any function can be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as an independent product. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc., and other media that can store program codes.
[0118] The above is only a specific implementation of the present application. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. The protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A typical production curve construction method based on uncertainty analysis, characterized in that: include: Apply the decline method to all single wells in the well area to obtain the single well technical recoverable reserves of each well; According to the stable production status of a single well, all wells in the well area are divided into well group A and well group B, wherein well group A is a well without an obvious stable production period, and well group B is a well with a stable production period; Use the probability method to calculate the P of the well group A K Reserves and P of well group B K reserves; Select the top K% single wells in terms of technically recoverable reserves in well group A and well group B respectively, and obtain the reserves of well group A. K Hejing Group B K ; In the well group A K The technically recoverable reserves of a single well within the screening and the P of the well group A K Single wells with similar reserves are grouped as well group A. K *, in the well group B K The technical recoverable reserves of the single well within the screening and the P of the well group B K Single wells with similar reserves are grouped as well group B. K *; Get the well group A K * Corresponding typical production curve and the well group B K *Corresponding typical production curve.
2. The method according to claim 1, characterized in that: The method of obtaining the well group A K *The corresponding typical production curve includes: The normalization method is used to obtain the well group A K *Corresponding typical production curve.
3. The method according to claim 2, characterized in that The normalization method is used to obtain the well group A K *The corresponding typical production curve includes: Set the well group A K *The production month of each well is 1, and the last production month of the well with the longest production time is m; Assume that the monthly production of the jth well in the i-th month is X ij , for X i1 , X i2 , …X in Take the arithmetic mean and get X i * , X i * =(X i1 +X i2 +X i3 +…+X ip ) / p, where j = 1, 2…p, p is the total number of wells opened in the i-th month, and p ≤ n; With X1 * , X2 * …X im * The monthly production of a single well is plotted as K *Corresponding typical production curve.
4. The method according to claim 1, characterized in that Obtain the well group B K *The corresponding typical production curve includes: Obtain the well group B K *The initial production, plateau period and decline rate of each well; Draw the well group B according to the initial production, stable production period and decline rate K *Corresponding typical production curve.
5. The method according to claim 4, characterized in that The calculation formula for the initial yield is: * =(q1+q2+q3+…q n ) / n, n is the well group B 10 * The number of wells opened, q i Well Group B 10 * The initial production of the ith well; The calculation formula of the stable production period is: * =(t1+t2+t3+…t n ) / n, n is the well group B 10 * Number of wells opened, t i Well Group B 10 * The stable production period of the i-th well; The calculation formula of the decline rate is: * =(d1+d2+d3+…d n ) / n, n is the well group B 10 * Number of wells opened, t i Well Group B 10 * The decline rate of the ith well.
6. The method according to claim 1, characterized in that The method further comprises: A rationality check is performed on the typical production curve to eliminate abnormal points in the typical production curve.
7. The method according to claim 1, characterized in that K=10, 50 and 90.
8. A typical production curve construction device based on uncertainty analysis, characterized in that: include: The module for obtaining the technically recoverable reserves of a single well is used to obtain the technically recoverable reserves of each well using the decreasing method for all the wells in the well area; A well group division module is used to divide all wells in the well area into well group A and well group B according to the stable production status of a single well, wherein the well group A is the well without an obvious stable production period, and the well group B is the well with a stable production period; P K The reserve calculation module is used to calculate the P of the well group A using the probability method. K Reserves and P of well group B K reserves; The first well group screening module is used to select the single wells with the top K% of single well technical recoverable reserves in well group A and well group B respectively, and obtain the well group A K Hejing Group B K ; The second well group screening module is used to K The technically recoverable reserves of a single well within the screening and the P of the well group A K Single wells with similar reserves are grouped as well group A. K *, in the well group B K The technical recoverable reserves of the single well within the screening and the P of the well group B K Single wells with similar reserves are grouped as well group B. K *; Typical production curve drawing module, used to obtain the well group A K * Corresponding typical production curve and the well group B K *Corresponding typical production curve.
9. An electronic device, characterized in that: include: processor; Memory; And a computer program, wherein the computer program is stored in the memory, and the computer program includes instructions, and when the instructions are executed by the processor, the electronic device executes the method according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the method according to any one of claims 1 to 7.