Method and device for evaluating economy of single well reserves
By obtaining economic parameter data to calculate the single-well reserve value and production cutoff point, the problem of evaluating the economic efficiency of oil and gas well reserves under oil price fluctuations has been solved, achieving efficient and accurate reserve economic evaluation that complies with SEC standards.
Patent Information
- Application Number
- CN202410539389.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-10-31
AI Technical Summary
Existing technologies cannot efficiently and accurately evaluate the reserve economics of oil and gas wells or development units when oil prices fluctuate significantly.
By acquiring economic evaluation parameter data for the target block, calculating the single-well reserves, single-well recovery, and single-well economic limit daily production, determining the single-well reserves cutoff point, single-well recovery cutoff point, and single-well economic limit cutoff point, and combining the vertical coordinate positional relationship, the economics of the target block are evaluated.
In the event of oil price fluctuations, we provide efficient and scientific economic evaluations of single-well reserves, comply with SEC guidelines on economic and compliance information disclosure, and reflect the current status of oil and gas wells or development units.
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Figure CN120875207A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of oil and gas exploration and development, and in particular to a method and apparatus for evaluating the economic efficiency of single-well reserves. Background Technology
[0002] The Oil and Gas Disclosure Modernization (SEC Guidelines) stipulate that all oil and gas reserves disclosed in the capital markets must meet economic requirements. In other words, the revenue from future oil and gas production from oil and gas wells or development units must not be less than the development investment and costs paid to obtain those production. However, there is currently no calculation method or model that can efficiently and accurately evaluate the economic viability of oil and gas wells or development units in the event of a sharp drop in oil prices. Summary of the Invention
[0003] In view of the above problems, the present invention is proposed to provide a method and apparatus for evaluating the economic efficiency of single-well reserves in order to overcome or at least partially solve the above problems.
[0004] In a first aspect, embodiments of the present invention provide a method for evaluating the economic efficiency of single-well reserves, including:
[0005] Obtain economic evaluation parameter data for the target block; based on the economic evaluation parameter data; calculate the single-well reserve value, single-well recovery value, and single-well economic limit daily production value; the economic evaluation parameters characterize the current production capacity of the target block;
[0006] Based on the single-well reserve value, single-well recovery value, and single-well economic limit daily production value, the corresponding single-well reserve cutoff point, single-well recovery cutoff point, and single-well economic limit cutoff point are determined from the preset single-well production technical profile curve.
[0007] Based on the positional relationship of the ordinates of the single-well reserve cutoff point, single-well recovery cutoff point, and single-well economic limit cutoff point, the evaluation result of the economics of the target block is determined.
[0008] In one embodiment, the economic evaluation parameters include the parameters in the table above, investment costs, and development costs, wherein the parameters in the table above represent the proven reserves of the target block that have been assessed.
[0009] Based on the aforementioned economic evaluation parameters, calculate the single-well reserves, single-well recovery, and single-well economic limit daily production, including:
[0010] Calculate the single-well reserves based on the data in the table above;
[0011] Calculate the single-well recovery value based on the aforementioned investment cost data;
[0012] Based on the development cost data, calculate the economic limit daily production value of a single well.
[0013] In one embodiment, the parameters in the table above include the assessed reserves of the target block and the preset number of wells;
[0014] The step of calculating the single-well reserve value based on the data in the above table includes:
[0015] The ratio of the assessed reserves of the target block to the preset number of wells is used as the single-well reserves.
[0016] In one embodiment, determining the corresponding single-well reserve cutoff point from a preset single-well production technical profile curve based on the single-well reserve value includes:
[0017] The point in the single-well production technical profile curve where the vertical axis matches the single-well reserve value is taken as the corresponding single-well reserve cutoff point.
[0018] In one embodiment, calculating the single-well recovery value based on the investment cost data includes:
[0019] Based on the investment cost data, as well as the current oil and gas prices, a single-well oil and gas production threshold is determined as the single-well recovery value; the oil and gas production threshold represents the minimum oil and gas production required to recover the investment cost.
[0020] In one embodiment, determining the corresponding single-well recovery cutoff point from a preset single-well production technical profile curve based on the single-well recovery value includes:
[0021] The point on the single-well production technical profile curve where the vertical axis matches the single-well recovery value is taken as the corresponding single-well recovery cutoff point.
[0022] In one embodiment, calculating the economic limit daily production value of a single well based on the development cost data includes:
[0023] Based on the development cost data, and the current oil and gas unit prices, a single-well daily production threshold is determined; this serves as the economic limit daily production value for a single well; the single-well daily production threshold represents the minimum daily oil and gas production required to pay the development costs.
[0024] In one embodiment, determining the corresponding economic limit cutoff point from a preset single-well production technical profile curve based on the single-well economic limit daily production value includes:
[0025] The point on the vertical axis of the single-well production technical profile curve that matches the single-well economic limit daily production value is taken as the corresponding economic limit cutoff point.
[0026] In one embodiment, obtaining the economic evaluation result of a single well based on the positional relationship of the ordinates of the single-well reserve cutoff point, the single-well recovery cutoff point, and the single-well economic limit cutoff point includes:
[0027] If the ordinate of the single-well reserve cutoff point is less than the ordinate of the single-well recovery cutoff point, but greater than the ordinate of the single-well economic limit cutoff point, then the result is the single-well economy.
[0028] If the ordinate of the single-well reserve cutoff point is greater than the ordinate of the single-well recovery cutoff point, then the result is that the single well is uneconomical.
[0029] If the ordinate of the single-well reserve cutoff point is less than the ordinate of the single-well economic limit cutoff point, then the result is that the single well is uneconomical.
[0030] In one embodiment, the single-well production technical profile curve is obtained in the following manner:
[0031] Obtain real-time production data of a single well in the analog block; plot the production technology profile curve of a single well in the analog block with production time as the horizontal axis and the output of the production time pattern as the vertical axis.
[0032] The production technology profile of a single well in the analog block is used as the single-well production technology profile curve of the target block.
[0033] Secondly, embodiments of the present invention provide a device for evaluating the economic efficiency of single-well reserves, comprising:
[0034] The calculation module is used to acquire economic evaluation parameter data of the target block; and calculate the single-well reserve value, single-well recovery value, and single-well economic limit daily production value based on the economic evaluation parameter data.
[0035] The determination module is used to determine the corresponding single-well reserve cutoff point, single-well recovery cutoff point, and single-well economic limit daily production cutoff point from the preset single-well production technical profile curve based on the single-well reserve value, single-well recovery value, and single-well economic limit daily production value.
[0036] The evaluation module is used to determine the evaluation result of the economics of the target block based on the coordinate information of the single-well reserve cutoff point, single-well recovery cutoff point, and single-well economic limit cutoff point.
[0037] Secondly, embodiments of the present invention provide a computer storage medium storing computer-executable instructions, which, when executed by a processor, implement the aforementioned method for evaluating the economic efficiency of single-well reserves.
[0038] Secondly, embodiments of the present invention provide a terminal device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the aforementioned method for evaluating the economic efficiency of single-well reserves.
[0039] The beneficial effects of the above-described technical solutions provided in the embodiments of the present invention include at least the following:
[0040] Regarding proven oil and gas reserves under SEC standards, the oil and gas reserves determined by this invention are based on the actual development, production, and operation of oil fields, as well as the technical and economic parameters required by SEC standards. The evaluation results meet the economic viability and compliance disclosure requirements of SEC standards for proven oil and gas reserves, and can objectively reflect the current status of SEC proven reserves for oil companies or oil and gas fields under different oil price scenarios. In the current context of significant fluctuations in international oil prices, this invention provides efficient, direct, and scientific application support for assessing the economic viability of oil companies' large-scale SEC reserves. The technical solution of this invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0041] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:
[0042] Figure 1 This is a flowchart of the method for evaluating the economic efficiency of single-well reserves in an embodiment of the present invention;
[0043] Figure 2 This is a flowchart illustrating the method for plotting a single-well production technical profile curve in an embodiment of the present invention.
[0044] Figure 3 This is a schematic diagram of the single-well economic evaluation curve in an embodiment of the present invention;
[0045] Figure 4 This is a schematic diagram of the structure of the single-well reserve economic evaluation device in an embodiment of the present invention. Detailed Implementation
[0046] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
[0047] To address the problem in existing technologies that cannot efficiently and accurately evaluate the economic viability of oil and gas well reserves when oil prices drop significantly, this invention provides a method and apparatus for evaluating the economic viability of single-well reserves.
[0048] Example
[0049] This invention provides a method for evaluating the economic viability of single-well reserves, the process of which is as follows: Figure 1 As shown, it includes the following steps:
[0050] Step S101: Obtain economic evaluation parameter data for the target block; based on the economic evaluation parameter data; calculate the single-well reserve value, single-well recovery value, and single-well economic limit daily production value; the economic evaluation parameters characterize the current production capacity of the target block;
[0051] Step S102: Based on the single-well reserve value, single-well recovery value and single-well economic limit daily production value, determine the corresponding single-well reserve cutoff point, single-well recovery cutoff point and single-well economic limit cutoff point from the preset single-well production technical profile curve.
[0052] Step S103: Determine the evaluation result of the economic efficiency of the target block based on the positional relationship of the ordinates of the single-well reserve cutoff point, the single-well recovery cutoff point, and the single-well economic limit cutoff point.
[0053] In some optional embodiments, the single-well production technology profile curve is referenced. Figure 2 As shown, it is obtained in the following way:
[0054] Step S201: Obtain real-time production data of a single well in the analog block; plot the production technology profile curve of a single well in the analog block with production time as the horizontal axis and production output of the production time pattern as the vertical axis.
[0055] Step S202: Use the production technology profile of a single well in the analog block as the single-well production technology profile curve of the target block.
[0056] By analyzing initial production, decline type, and decline rate, a single-well production prediction technical profile can be constructed for the representative well (average single well) of the unit. This profile characterizes the expected production trend and characteristics of the block after future drilling and development. The horizontal axis of the single-well production prediction technical profile represents production time, and the vertical axis represents the corresponding production. Initial production (expressed as daily production) is usually calculated by referencing the average test production of oil and gas wells in the target block or the initial stable daily production of test wells, reflecting the initial production capacity of the average single well in the target block. Decline curve types include exponential decline, hyperbolic decline, and harmonic decline. In production dynamics analysis, exponential decline is the most commonly used. Some unconventional shale oil and gas or low-permeability oil and gas wells may use a combination of hyperbolic decline and exponential decline. The decline model reflects the production patterns of oil and gas wells during the production period under different oil and gas reservoir types, reservoir properties, and development and production processes. Decline rate: The decline rate is the change in oil and gas well production per unit time. Different oil and gas reservoirs will have significantly different decline rates under different development and production processes.
[0057] The economic evaluation parameters include the parameters in the table above, investment costs, and development costs. The parameters in the table above include the assessed reserves of the target block and the planned number of wells to be drilled.
[0058] In some optional embodiments, step S101 above can be implemented in the following manner:
[0059] (1) Calculate the single-well reserves based on the data in the table above;
[0060] For example, the storage value of a single well can be calculated in the following way:
[0061] The ratio of the assessed reserves of the target block to the preset number of wells is used as the single-well reserves.
[0062] Specifically, this can be achieved using the following formula:
[0063]
[0064] Qf=Qi-N×[-Ln(1-Da) / 365](2)Calculate the single well recovery value based on the investment cost data;
[0065] For example, the recovery value of a single well can be calculated in the following way:
[0066] Based on investment cost data, as well as current oil and gas prices, a single-well oil and gas production threshold is determined as the single-well recovery value; the oil and gas production threshold represents the minimum oil and gas production required to recover investment costs.
[0067] Specifically, this can be achieved using the following formula:
[0068]
[0069]
[0070]
[0071] (3) Calculate the economic limit daily production value of a single well based on the development cost data.
[0072] For example, the economic limit daily production value of a single well can be calculated in the following way:
[0073] Based on development cost data, as well as current oil and gas prices, a single-well daily production threshold is determined; this serves as the economic limit daily production value for a single well; the single-well daily production threshold represents the minimum daily oil and gas production required to cover development costs.
[0074] Specifically, this can be achieved using the following formula:
[0075]
[0076] In some optional embodiments, step S102 above can be implemented in the following manner:
[0077] (1) Based on the single-well reserve value, determine the corresponding single-well reserve cutoff point from the preset single-well production technical profile curve. The daily production at the single-well reserve cutoff point is calculated based on the ratio of the assessed SEC-proven undeveloped reserves in the target block to the planned number of wells to fully utilize the reserves in the block. This represents the average SEC-proven recoverable reserves controlled by a single well in the target block, as assessed through technical analysis. Specifically, this can be achieved in the following way:
[0078] The point on the single-well production technical profile curve where the vertical axis coincides with the single-well reserve value is taken as the corresponding single-well reserve cutoff point.
[0079] (2) Based on the single-well recovery value, determine the corresponding single-well recovery cutoff point from the preset single-well production technical profile curve. The daily production at the single-well recovery cutoff point is determined based on the estimated development investment, costs, and taxes to be paid during the two stages of single-well construction and commissioning. According to current oil and gas valuation prices, calculate the minimum amount of oil / gas that the well needs to produce in the future to recover the aforementioned investment, costs, and related taxes. In terms of the single-well technical profile, this means that from the first day of production, it indicates the daily production level or the point in time at which the amount of oil and gas produced is just enough to cover the initial development investment, costs, and production taxes. Specifically, this can be achieved in the following way:
[0080] The point on the single-well production technical profile curve where the vertical axis matches the single-well recovery value is taken as the corresponding single-well recovery cutoff point.
[0081] (3) Based on the single-well economic limit daily production value, determine the corresponding economic limit cutoff point from the preset single-well production technical profile curve. The economic limit daily production is established after drilling has been completed in the target block and the area has entered the development and production stage. It considers the minimum daily production of a single well required to cover the direct operating costs of oil and gas well production at this stage, without considering the initial drilling and completion investment. It is the ratio of direct operating costs, including taxes and other production expenditures, to the oil and gas valuation price, reflecting the minimum production standard required to maintain continued oil and gas well production. Specifically, this can be achieved in the following ways:
[0082] The point on the vertical axis of the single-well production technical profile curve that matches the daily production value of the single well's economic limit is taken as the corresponding economic limit cutoff point.
[0083] In some optional embodiments, the economics of a single well can be evaluated in the following manner:
[0084] (1) If the ordinate of the single well reserve cutoff point is less than the ordinate of the single well recovery cutoff point, but greater than the ordinate of the single well economic limit cutoff point, then the result is the single well economy.
[0085] (2) If the ordinate of the single well reserve cutoff point is greater than the ordinate of the single well recovery cutoff point, then the result is that the single well is uneconomical.
[0086] (3) If the ordinate of the cutoff point of the single well reserves is less than the ordinate of the cutoff point of the single well economic limit, then the result is that the single well is uneconomical.
[0087] Based on the same inventive concept, embodiments of the present invention also provide a device for evaluating the economic efficiency of single-well reserves, the structure of which is as follows: Figure 4 As shown, it includes:
[0088] Calculation module 41 is used to obtain economic evaluation parameter data of the target block; and calculate the single-well reserve value, single-well recovery value and single-well economic limit daily production value based on the economic evaluation parameter data.
[0089] The determination module 42 is used to determine the corresponding single-well reserve cutoff point, single-well recovery cutoff point, and single-well economic limit daily production cutoff point from the preset single-well production technical profile curve based on the single-well reserve value, single-well recovery value, and single-well economic limit daily production value.
[0090] Evaluation module 43 is used to determine the evaluation results of the economics of the target block based on the coordinate information of the single-well reserve cutoff point, single-well recovery cutoff point, and single-well economic limit cutoff point.
[0091] The following is an illustrative example of a method for evaluating the economic viability of single-well reserves:
[0092] The specific implementation process of assessing the economic viability of a certain reserve block based on the SEC reserves of a single well at an oil price of $61 / barrel in 2019, and the subsequent economic impact when oil prices plummeted to $41 / barrel in 2020. In this well block, the SEC-proven reserves totaled 44,352 tons at $61 / barrel in 2019, and the development plan included drilling 5 development wells, with a single well SEC-proven reserves of 8,870 tons. In 2020, the assessed oil price dropped sharply to $41.4 / barrel.
[0093] 1. Based on the actual development and production dynamics of comparable reservoirs in this block, on a rectangular coordinate system, the reserve prediction profile of typical wells in this unit is drawn according to the decline model obtained from the technical analysis of developed units in the adjacent area. Through the initial daily production (11.836t / d), annual decline rate (28.5%), and decline model (exponential decline) of typical wells, the production prediction technical profile of single well SEC reserves in the target reservoir is established and generated.
[0094] 2. Based on this production forecast technical profile, the cutoff point of the typical well's SEC reserves (8870t) at the end of 2019 was matched, corresponding to the 1271st day of production, with a daily oil production of 3.682t / d;
[0095] 3. Based on the actual drilling and completion costs, surface facilities and disposal costs of this unit (corresponding to RMB 12.28 million / well according to the development plan), the minimum recovery amount to recover the investment and cost of this well is determined to be (3482 tons). Matching the production prediction technical profile of this well, the corresponding production days are the 343rd day and the daily oil production is 8.639t / d.
[0096] 4. Based on the actual operating costs and taxes of this unit, and assuming that fixed costs account for 70%, the economic limit daily production of this well under the current oil price is calculated to be 1.742 t / d, corresponding to the 2085th production day, with a cumulative production of 10,982 tons.
[0097] 5. Reference Figure 3 As shown, the cutoff point for the existing SEC reserves of this unit's single well is day 1271, which is later than day 343, the day for recovering the investment cost of the single well. At the same time, the production at the reserve cutoff point is higher than the daily production level on the well's economic limit cutoff date. Therefore, the existing SEC confirmed reserves of this well are still economical at an oil price of $41.4 per barrel, meeting the SEC's economic requirements for reserves, and there is no risk of write-off or reduction.
[0098] Regarding the evaluation device for single-well reserve economy in the above embodiments, the specific operation methods of each module have been described in detail in the embodiments of the relevant method, and will not be elaborated here.
[0099] Unless otherwise specifically stated, terms such as processing, calculation, operation, determination, display, etc., may refer to the actions and / or processes of one or more processing or computing systems or similar devices that represent the manipulation and conversion of data representing physical (e.g., electronic) quantities within the registers or memory of the processing system into other data similarly representing physical quantities within the memory, registers, or other such information storage, transmission, or display devices of the processing system. Information and signals can be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.
[0100] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process may be rearranged without departing from the scope of this disclosure. The appended method claims provide elements of various steps in an exemplary order and are not intended to limit the scope to the specific order or hierarchy described.
[0101] In the detailed description above, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features in a single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of the invention.
[0102] Those skilled in the art will also understand that the various illustrative logic blocks, modules, circuits, and algorithm steps described in conjunction with the embodiments herein can be implemented as electronic hardware, computer software, or a combination thereof. To clearly illustrate the interchangeability between hardware and software, the various illustrative components, blocks, modules, circuits, and steps described above are generally described in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system. Those skilled in the art can implement the described functionality in alternative ways for each specific application; however, such implementation decisions should not be construed as departing from the scope of this disclosure.
[0103] The steps of the methods or algorithms described in conjunction with the embodiments herein can be directly embodied in hardware, software modules executed by a processor, or a combination thereof. The software modules can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium well known in the art. An exemplary storage medium is connected to the processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. The ASIC can reside in a user terminal. Alternatively, the processor and storage medium can exist as discrete components in the user terminal.
[0104] For software implementation, the techniques described in this application can be implemented using modules (e.g., procedures, functions, etc.) that perform the functions described in this application. This software code can be stored in memory units and executed by a processor. The memory units can be implemented within the processor or outside the processor; in the latter case, they are communicatively coupled to the processor via various means, as is well known in the art.
[0105] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."
Claims
1. A method for evaluating the economic viability of single-well reserves, characterized in that, include: Obtain economic evaluation parameter data for the target block; Based on the economic evaluation parameter data, calculate the single-well reserve value, single-well recovery value, and single-well economic limit daily production value; The economic evaluation parameters characterize the current production capacity of the target block; Based on the single-well reserve value, single-well recovery value, and single-well economic limit daily production value, the corresponding single-well reserve cutoff point, single-well recovery cutoff point, and single-well economic limit cutoff point are determined from the preset single-well production technical profile curve. Based on the positional relationship of the ordinates of the single-well reserve cutoff point, single-well recovery cutoff point, and single-well economic limit cutoff point, the evaluation result of the economics of the target block is determined.
2. The method as described in claim 1, characterized in that, The economic evaluation parameters include the parameters in the table above, investment costs, and development costs. The parameters in the table above represent the proven reserves of the target block that have been assessed. Based on the aforementioned economic evaluation parameter data; The calculation of single-well reserves, single-well recovery, and single-well economic limit daily production includes: Calculate the single-well reserves based on the data in the table above; Calculate the single-well recovery value based on the aforementioned investment cost data; Based on the development cost data, calculate the economic limit daily production value of a single well.
3. The method as described in claim 2, characterized in that, The parameters in the table above include the assessed reserves of the target block and the preset number of wells; The step of calculating the single-well reserve value based on the data in the above table includes: The ratio of the assessed reserves of the target block to the preset number of wells is used as the single-well reserves.
4. The method as described in claim 3, characterized in that, Based on the single-well reserve value, the corresponding single-well reserve cutoff point is determined from the preset single-well production technical profile curve, including: The point in the single-well production technical profile curve where the vertical axis matches the single-well reserve value is taken as the corresponding single-well reserve cutoff point.
5. The method as described in claim 2, characterized in that, Based on the aforementioned investment cost data, calculate the single-well recovery value, including: Based on the investment cost data, as well as the current oil and gas prices, a single-well oil and gas production threshold is determined as the single-well recovery value; the oil and gas production threshold represents the minimum oil and gas production required to recover the investment cost.
6. The method as described in claim 5, characterized in that, Based on the single-well recovery value, the corresponding single-well recovery cutoff point is determined from the preset single-well production technical profile curve, including: The point on the single-well production technical profile curve where the vertical axis matches the single-well recovery value is taken as the corresponding single-well recovery cutoff point.
7. The method as described in claim 2, characterized in that, Based on the aforementioned development cost data, calculate the economic limit daily production value of a single well, including: Based on the development cost data, and the current oil and gas unit prices, a single-well daily production threshold is determined; this serves as the economic limit daily production value for a single well; the single-well daily production threshold represents the minimum daily oil and gas production required to pay the development costs.
8. The method as described in claim 7, characterized in that, Based on the daily production limit of a single well's economic potential, the corresponding economic limit cutoff point is determined from the pre-set single-well production technical profile curve, including: The point on the vertical axis of the single-well production technical profile curve that matches the single-well economic limit daily production value is taken as the corresponding economic limit cutoff point.
9. The method as described in claim 2, characterized in that, The economic evaluation result of a single well is obtained based on the positional relationship of the ordinates of the single well reserve cutoff point, the single well recovery cutoff point, and the single well economic limit cutoff point, including: If the ordinate of the single-well reserve cutoff point is less than the ordinate of the single-well recovery cutoff point, but greater than the ordinate of the single-well economic limit cutoff point, then the result is the single-well economy. If the ordinate of the single-well reserve cutoff point is greater than the ordinate of the single-well recovery cutoff point, then the result is that the single well is uneconomical. If the ordinate of the single-well reserve cutoff point is less than the ordinate of the single-well economic limit cutoff point, then the result is that the single well is uneconomical.
10. The method as described in claim 1, characterized in that, The single-well production technical profile curve is obtained in the following manner: Obtain real-time production data of a single well in the analog block; plot the production technology profile curve of a single well in the analog block with production time as the horizontal axis and the output of the production time pattern as the vertical axis. The production technology profile of a single well in the analog block is used as the single-well production technology profile curve of the target block.
11. A device for evaluating the economic efficiency of single-well reserves, characterized in that, include: The calculation module is used to obtain economic evaluation parameter data for the target block; Based on the aforementioned economic evaluation parameter data; Calculate the single-well reserves, single-well recovery volume, and single-well economic limit daily production value; The economic evaluation parameters characterize the current production capacity of the target block; The determination module is used to determine the corresponding single-well reserve cutoff point, single-well recovery cutoff point, and single-well economic limit daily production cutoff point from the preset single-well production technical profile curve based on the single-well reserve value, single-well recovery value, and single-well economic limit daily production value. The evaluation module is used to determine the evaluation result of the economics of the target block based on the positional relationship of the ordinates of the single-well reserve cutoff point, the single-well recovery cutoff point, and the single-well economic limit cutoff point.
12. A computer storage medium, characterized in that, The computer storage medium stores computer-executable instructions, which, when executed by a processor, implement the single-well reserve economic evaluation method according to any one of claims 1-10.
13. A terminal device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the single-well reserve economy evaluation method according to any one of claims 1-10.