Plate-based oil field benefit loss evaluation method and device and control method

Abstract

The invention discloses an oil field benefit loss evaluation method based on a chart. The method comprises the steps that the number and oil field information of oil fields in a jurisdiction are acquired; an oil field benefit loss evaluation chart is established based on ton oil loss and loss rate, an oil field evaluation model is established in combination with oil field historical loss data, and loss partition standards are divided based on the evaluation model; calculating ton oil loss and loss rate of each oil field based on the oil field information; and projecting ton oil loss and loss rate data of each oil field into the evaluation chart to output an evaluation result of each oil field. The invention further discloses a loss reduction control method and an oil field benefit loss reduction evaluation device based on the chart. According to the invention, description and partition classification are carried out according to the loss reduction characteristics of different oil fields, appropriate development adjustment technical countermeasures are made according to the oil fields in different intervals, and the development benefits of the oil fields are improved.

Description

Technical Field

[0001] This invention relates to the field of reservoir asset management technology, and in particular to a method, apparatus and control method for evaluating the depreciation of oilfield benefits based on charts. Background Technology

[0002] Oil and gas asset depletion (hereinafter referred to as depletion) is the value of oil and gas assets that gradually transfers to the cost of extracted products (oil and gas) as development progresses. It is a key focus of oil and gas accounting policies for the government, the oil and gas industry, and related sectors, and its subsequent measurement is also challenging. Since the implementation of the production method for depletion calculation in 2009, SEC (Securities and Exchange Commission) reserves have been required to be disclosed by US-listed oil companies as economically recoverable reserves, serving as the basis for calculating oil and gas depletion. Therefore, the size of SEC reserves is directly related to depletion, which is incorporated into the company's production costs, thus affecting overall net profit.

[0003] In the total cost structure of domestic oilfields, depreciation accounts for 41%, making it the most significant factor affecting current oilfield profitability. All oilfield companies consider controlling depreciation as the most important technical strategy for improving oilfield quality and efficiency. Meanwhile, with the continuous fluctuations in international oil prices in recent years, SEC reserves and their reserve-to-production ratio have fluctuated dramatically, resulting in asset depreciation rate fluctuations of ±30%. How to quantify the impact of depreciation on profitability and scientifically and rationally formulate depreciation control strategies is an important research topic for improving the overall profitability and management level of oilfields.

[0004] Therefore, there is a need to improve existing methods for evaluating the depreciation of oilfield benefits. Summary of the Invention

[0005] In view of this, the purpose of this invention is to propose a map-based method, device and control method for evaluating the depreciation of oilfield benefits, which describes and classifies the depreciation characteristics of different oilfields, thereby improving the development benefits of oilfields.

[0006] To achieve the above objectives, one aspect of the present invention provides a method for evaluating the depreciation of oilfield benefits based on charts, comprising the following steps: Establish an oilfield benefit depreciation evaluation chart based on oil consumption per ton and consumption rate; Establish depletion zoning standards by combining historical depletion data of oilfields; Obtain the oil loss per ton and the loss rate of the oilfield to be evaluated; The oil loss per ton and loss rate of the oilfield to be evaluated are projected onto the evaluation map. Based on the loss zoning standard, the loss zoning results of the oilfield to be evaluated are obtained.

[0007] In some implementations, an oilfield benefit depreciation evaluation chart is established based on oil loss per ton and loss rate, including: An evaluation chart for oilfield efficiency depletion is established with the depletion rate on the horizontal axis and the depletion per ton of oil on the vertical axis.

[0008] In some implementations, obtaining the oil loss per ton and the loss rate of the oilfield to be evaluated includes: Obtain depletion-related information for the oil field to be evaluated. Depletion-related information includes: net asset value, depletion amount, current production of the oil field, and SEC reserves. The depletion rate and depletion per ton of oil in the oil field to be evaluated are calculated based on the depletion-related information of the oil field to be evaluated.

[0009] In some implementation methods, loss zoning standards are established by combining historical loss data of the oilfield, including: Based on historical oilfield loss data, oilfield loss is divided into low loss zone, medium loss zone, high loss zone, and full loss zone.

[0010] In some implementations... The evaluation criterion for low loss zone is: (loss per ton of oil + loss rate) < 0.15; The evaluation standard for the medium loss zone is: 0.15 ≤ (loss per ton of oil + loss rate) < 0.5; The evaluation criterion for high loss zones is: 0.5 ≤ (loss per ton of oil + loss rate) < 1; The evaluation criterion for the total loss zone is: loss rate = 1.

[0011] In some implementations, the depletion rate D is calculated as follows:

[0012] The method for calculating SEC reserves is as follows:

[0013] in, For current output, denoted as SEC reserves, n as the decreasing characteristic value, and t as the economic mining life in months.

[0014] In some implementation methods, the formula for calculating the fuel consumption per ton is: Oil consumption per ton = Consumption amount / Current production The depletion amount is calculated as the product of the net asset value and the depletion rate, with the unit being RMB 10,000 per ton.

[0015] In some implementation methods, loss zoning standards are established by combining historical loss data of the oilfield, including: Historical depletion data of the oilfield is obtained, and descriptive statistics are performed on the historical depletion data to obtain data distribution and variability. Regression analysis is conducted on the relationship between the statistical results of the historical depletion data and reserves to establish an evaluation model. Based on the evaluation model, depletion zoning criteria are defined.

[0016] This invention also provides a depletion control method to improve oilfield efficiency, comprising the following steps: The depletion zoning results of the oilfield to be evaluated are obtained by using any of the above methods based on the map; Based on the depletion zoning results, corresponding depletion control strategies are adopted.

[0017] In some implementations, based on the depletion partitioning results, corresponding depletion control strategies are adopted, including: When the depletion partitioning result shows a low depletion zone, the depletion control strategy is to stabilize development performance to maintain the depletion level. When the depletion partitioning result shows the medium depletion zone, the depletion control strategy is: improve development effectiveness to stabilize the depletion level; When the depletion zoning result shows a high depletion zone, the depletion control strategy is to change the development method to reduce the depletion level; When the depletion zoning result shows a full depletion zone, the depletion control strategy is: to conduct development trials or reserve development technologies based on oil prices.

[0018] The present invention also provides a plate-based oilfield benefit depreciation evaluation device, which is used to implement the above-mentioned method, including: The chart construction module is configured to create an oilfield benefit depreciation evaluation chart based on oil consumption per ton and consumption rate. The zoning standard construction module is configured to establish depletion zoning standards by combining historical depletion data of the oilfield. The information acquisition module is configured to acquire the oil consumption per ton and the consumption rate of the oilfield to be evaluated. The evaluation module is configured to project the oil loss per ton and loss rate of the oilfield to be evaluated onto the evaluation map, and obtain the loss zoning results of the oilfield to be evaluated based on the loss zoning standard.

[0019] The present invention has at least the following beneficial technical effects: This invention provides a chart-based method and apparatus for evaluating the depletion of oilfield benefits. It selects two key parameters that characterize depletion features, and combines the length of economical production life under current oil prices with factors affecting profitability. An evaluation chart is established using depletion per ton of oil and depletion rate as indicators. This chart describes and classifies the depletion characteristics of different oilfields, enabling the development of reasonable strategies and the identification of new oil and gas asset investment directions for oilfields in different zones, thereby improving operational efficiency and increasing corporate profits. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of an embodiment of the oilfield benefit depreciation evaluation method based on charts provided by the present invention; Figure 2 This invention provides an oilfield benefit depreciation evaluation chart; Figure 3 The schematic diagram of oilfield zoning provided by the present invention is based on the output of an oilfield benefit depletion evaluation map. Figure 4 This is a schematic diagram of an embodiment of the oilfield benefit depreciation evaluation device based on a chart provided by the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to specific examples and the accompanying drawings.

[0023] It should be noted that all uses of "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of the present invention. Subsequent embodiments will not explain this in detail.

[0024] Oilfield depletion refers to the costs incurred during the development and production of oil and gas assets due to resource consumption. Specifically, depletion is the gradual decrease in the value of oil and gas assets over their useful life, reflecting the extent of resource utilization.

[0025] Oilfield depreciation typically includes the following aspects: Oil and gas asset depreciation: This refers to the cumulative depreciation of oil and gas assets, which reflects the value loss of oil and gas assets during the extraction process; Well and related facility depreciation: This includes the depreciation costs of drilling, pipelines and other related facilities; Auxiliary equipment and facility depreciation: This part of the cost covers the depreciation of auxiliary equipment and facilities.

[0026] Controlling oilfield losses is crucial for improving oilfield efficiency. Optimizing development methods, improving technology, and refining management practices can effectively reduce losses, thereby enhancing the overall economic benefits of the oilfield. Quantifying the impact of losses on efficiency in conjunction with fluctuations in oil prices and SEC reserves, and scientifically and rationally formulating losses control strategies, is an important research area for improving the overall efficiency and management level of oilfields.

[0027] To achieve the above objectives, the first aspect of the present invention proposes an embodiment of a method for evaluating the depreciation of oilfield benefits based on charts. Figure 1 This diagram illustrates an embodiment of the chart-based oilfield benefit depreciation evaluation method provided by the present invention. Figure 1 As shown, the oilfield benefit depreciation evaluation method based on charts in this embodiment of the invention includes the following steps: S1 obtains the number of oil fields and oil field information within its jurisdiction; S2 establishes an oilfield benefit depreciation evaluation chart based on ton oil depreciation and depreciation rate, and establishes an oilfield evaluation model based on historical oilfield depreciation data, and divides depreciation zoning standards based on the evaluation model; S3 calculates the oil consumption per ton and the consumption rate for each oil field based on oil field information; S4 projects the oil loss per ton and loss rate data of each oilfield onto the evaluation chart to output the evaluation results for each oilfield.

[0028] Furthermore, in S1, oilfield information includes: net asset value, depletion amount, current production of the oilfield, and SEC reserves.

[0029] Furthermore, in S2, an oilfield profitability depreciation evaluation chart is established based on the depreciation per ton of oil and the depreciation rate. Two important parameters that can characterize the depreciation features are selected: the depreciation rate and the depreciation per ton of oil. The depreciation rate reflects the length of the economical production life under the current oil price, reflects the amount of depreciation that should be borne under the current conditions, and affects the current profit; the net value per ton of oil reflects the long-term asset burden carried per unit of output, affecting the difficulty of long-term profitability.

[0030] The oilfield evaluation model, which combines historical depletion data, includes: Historical depletion data of the oilfield is obtained, and descriptive statistics are performed on the data to obtain data distribution and variability. Regression analysis is then conducted based on the statistical results of the oilfield depletion data and the relationship with reserves to establish an evaluation model.

[0031] The sources for obtaining historical depletion data for oilfields can include internal company data. Oilfield development companies typically possess detailed financial and production data, including historical oilfield output, input costs, and depletion rates, which is the most direct and reliable data source. Additionally, data can come from publicly available reports and literature. Some oilfield development companies publish annual or technical reports containing data on oilfield depletion. Furthermore, academic literature and industry reports may also contain relevant data. Government agencies and industry associations, such as the U.S. Energy Information Administration (EIA) and the China Petroleum and Chemical Industry Federation, may also publish data and reports on oilfield development. Further, the collected data undergoes screening and processing to ensure its accuracy and consistency. This includes, for example, removing outliers and correcting erroneous data.

[0032] Descriptive statistics on the data include summarizing and analyzing the basic characteristics of historical oilfield attrition data, such as mean, median, and standard deviation, to understand the data distribution and variability. When it is necessary to explore the relationship between oilfield attrition rate and other variables (such as production, reserves, and extraction time), regression analysis can be used to establish mathematical expressions between the attrition rate and these variables, thereby predicting or explaining changes in the attrition rate.

[0033] Furthermore, in S3, the depletion rate D is calculated as follows:

[0034] The method for calculating SEC reserves is as follows:

[0035] in, For current output, denoted as SEC reserves, n as the decreasing characteristic value, and t as the economic mining life in months.

[0036] The depletion amount is calculated by multiplying the net asset value by the depletion rate, and the unit is RMB 10,000 per ton.

[0037] The higher the oil price, the longer the economic lifespan, the larger the SEC reserves, the lower the depletion rate, and the slower the asset clearing speed; conversely, the lower the price, the slower the asset clearing speed. Therefore, the depletion rate represents the speed at which an oil field depletes (clears assets) under the current assessed oil price.

[0038] The formula for calculating the oil consumption per ton is: Oil consumption per ton = Consumption amount / Current production The higher the oil price, the lower the attrition rate, and the lower the attrition rate per ton of oil; therefore, the attrition rate represents the amount of attrition borne by a unit of output under the current assessed oil price.

[0039] Furthermore, in S4, the criteria for dividing depletion zones based on the evaluation model include: Based on historical oilfield loss data, oilfield loss is divided into low loss zone, medium loss zone, high loss zone, and total loss zone. Among these, The evaluation criterion for low loss zone is: (loss per ton of oil + loss rate) < 0.15; The evaluation standard for the medium loss zone is: 0.15 ≤ (loss per ton of oil + loss rate) < 0.5; The evaluation criterion for high loss zones is: 0.5 ≤ (loss per ton of oil + loss rate) < 1; The evaluation criterion for the total loss zone is: loss rate = 1; The unit for calculating the loss per ton of oil is 10,000 yuan.

[0040] Furthermore, based on the depletion partition output, a corresponding control strategy is implemented. The control strategy includes: For low-loss oilfields with both low loss rate and low loss per ton of oil, high-investment development and adjustment work such as formation reorganization and injection-production well network reconstruction can be carried out to ensure the stability or increase of production scale and support the maintenance and consolidation of low loss.

[0041] For medium-loss oilfields with low loss rates and low loss per ton of oil, implement high-investment oil and water well work, such as water injection well renewal, improvement of local oil production wells, and offensive measures, to achieve stable production and orderly asset depletion in these oilfields.

[0042] For high-loss oilfields with both high loss rates and high loss per ton of oil, implement low-investment maintenance oil and water well measures to control the increase in asset size, or conduct local pilot development tests to ensure a reduction in loss while creating conditions for future profitable development.

[0043] For oilfields with a 100% depletion rate, investment in development should be restricted and adjusted under low oil prices, while local exploratory trials can be conducted under high oil prices to lay the foundation for future profitable development and orderly depletion.

[0044] The theoretical basis for dividing the loss zone based on the map considers that the level of loss will affect the current efficiency and profit of the oilfield: Current period depletion = Net assets * Depletion rate = Crude oil production * Net assets per ton of oil * Depletion rate In the above formula, crude oil production can generally be considered a constant. Therefore, current period depletion is mainly determined by the product of net asset value per ton of oil and the depletion rate, and is directly proportional to both. Thus, controlling the product of these two within a certain range is equivalent to controlling current period depletion within a certain range.

[0045] By benchmarking against big data from domestic oilfields, the boundary values ​​for different depletion ranges are determined, and statistics are compiled based on the benefit classification of domestic oilfield big data analysis: When the oil loss per ton is controlled below $30 / barrel, it is considered a low loss zone (the production of such oil fields in China accounts for about 15%). The next step should be to maintain the loss level by adjusting injection and production to stabilize the development effect. When the oil loss per ton is between $30 and $50 per barrel, it is considered a low to medium loss area (the production of such oil fields in China accounts for about 30%). The next step should focus on local adjustments and improvements to the development of old areas to stabilize the loss. When the oil loss per ton is between $50 and $80 per barrel, it is considered a medium-to-high loss zone (the production of such oil fields in China accounts for about 25%). The next step should focus on optimizing and adjusting the well network of the formation to improve the development effect and reduce the loss. When the loss per ton of oil is above $80 / barrel and the loss rate is less than 100%, it is considered a high loss area (the production of such oil fields in China accounts for about 20%). The next step should be to control and reduce loss by changing the development mode. When the oil loss rate is 100%, the current net asset value will be amortized in one go and regarded as the full loss zone (the production of such oil fields in China accounts for about 10%). The next step is to reduce investment under low oil prices and carry out development trials and reserve development technologies under high oil prices, so as to lay a technical foundation for future loss control.

[0046] Therefore, the two indicators of oil consumption per ton and consumption rate are used as the horizontal and vertical axes of the chart, respectively, as follows: Figure 2 As shown, the horizontal axis represents the loss rate, and the vertical axis represents the loss per ton of oil, in units of 10,000 yuan / ton. By projecting the loss rate and loss per ton of oil data of the oilfields under its jurisdiction onto this axis, a scatter plot of loss rate-loss per ton of oil is formed for different oilfields. Based on the oil reservoirs in different regions, targeted development technology strategies that match investment and effectiveness are formulated.

[0047] The present invention will be further described below with reference to specific embodiments, such as... Figure 3 The diagram shows a schematic representation of oilfield zoning based on an oilfield benefit depletion evaluation chart, obtained through specific implementation examples. According to the depletion zoning results from the chart output, Gangdong, Gangzhong, Gangxi, and Zaoyuan oilfields should primarily focus on injection-production adjustments to stabilize development effectiveness and depletion levels; Wangguantun and Shenu Temple oilfields should conduct localized development adjustments to stabilize depletion; Zhouqingzhuang and Wangxuzhuang oilfields should undergo large-scale well network adjustments to improve development effectiveness and reduce depletion; Duanliubo and Yesanbo oilfields should implement gas drive and other development method conversions to improve development effectiveness and reduce depletion levels; Tanggu oilfield is a fully depleted oilfield, and under low oil prices, investment should be reduced, while under high oil prices, horizontal well + volumetric fracturing development tests should be conducted to lay the foundation for future benefit development and depletion control.

[0048] It should be particularly noted that the steps in each embodiment of the above-mentioned map-based oilfield benefit depletion evaluation method can be interchanged, substituted, added, or deleted. Therefore, these reasonable permutations and combinations of the map-based oilfield benefit depletion evaluation method should also fall within the protection scope of this invention, and the protection scope of this invention should not be limited to the embodiments.

[0049] In view of the above objectives, a second aspect of the present invention proposes an oilfield benefit depreciation evaluation device based on a chart. Figure 4 The diagram shown is a schematic representation of an embodiment of the oilfield benefit depreciation evaluation device based on a chart provided by the present invention. Figure 4 As shown, the oilfield benefit depreciation evaluation device based on a chart according to an embodiment of the present invention includes the following modules: Information acquisition module 011 is configured to acquire the number of oilfields and oilfield information within the jurisdiction; The chart construction module 012 is configured to establish an oilfield benefit depreciation evaluation chart based on oil depreciation per ton and depreciation rate, establish an oilfield evaluation model by combining historical oilfield depreciation data, and divide depreciation zoning standards based on the evaluation model. Calculation module 013 is configured to calculate the oil consumption per ton and the consumption rate for each oil field based on oil field information; Evaluation module 014 is configured to project the oil consumption per ton and consumption rate data of each oil field onto the evaluation chart to output the evaluation results of each oil field.

[0050] Furthermore, the map construction module further includes a model construction module. The model construction module is configured to acquire historical depletion data of the oilfield, perform descriptive statistics on the data to obtain data distribution and variability, and conduct regression analysis based on the statistical results of the oilfield depletion data and the relationship with reserves to establish an evaluation model.

[0051] Those skilled in the art will also understand that the various exemplary logic blocks, modules, circuits, and algorithm steps described in conjunction with the disclosure herein can be implemented as electronic hardware, computer software, or a combination of both. To clearly illustrate this interchangeability between hardware and software, the functionality of various illustrative components, blocks, modules, circuits, and steps has been generally described. Whether this functionality is implemented as software or as hardware depends on the specific application and the design constraints imposed on the system as a whole. Those skilled in the art can implement the functionality in various ways for each specific application, but such implementation decisions should not be construed as departing from the scope of the embodiments disclosed herein.

[0052] The above are exemplary embodiments disclosed in this invention. However, it should be noted that various changes and modifications can be made without departing from the scope of the embodiments of this invention as defined by the claims. The functions, steps, and / or actions of the methods according to the disclosed embodiments described herein do not need to be performed in any particular order. Furthermore, although the elements disclosed in the embodiments of this invention may be described or claimed individually, they may be understood as multiple unless explicitly limited to a singular number.

[0053] It should be understood that, as used herein, the singular form “a” is intended to include the plural form as well, unless the context clearly supports an exception. It should also be understood that, as used herein, “and / or” refers to any and all possible combinations of one or more of the associated listed items.

[0054] The embodiment numbers disclosed in the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0055] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0056] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples. Within the framework of the invention, technical features of the above embodiments or different embodiments can be combined, and many other variations of different aspects of the invention exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A method for evaluating the depreciation of oilfield benefits based on charts, characterized in that, Includes the following steps: Establish an oilfield benefit depreciation evaluation chart based on oil consumption per ton and consumption rate; Establish depletion zoning standards by combining historical depletion data of oilfields; Obtain the oil loss per ton and the loss rate of the oilfield to be evaluated; The oil loss per ton and loss rate of the oilfield to be evaluated are projected onto the evaluation map, and the loss zoning results of the oilfield to be evaluated are obtained based on the loss zoning standard.

2. The oilfield benefit depreciation evaluation method based on charts according to claim 1, characterized in that, An oilfield benefit depreciation evaluation chart is established based on oil loss per ton and loss rate, including: An evaluation chart for oilfield efficiency depletion is established with the depletion rate on the horizontal axis and the depletion per ton of oil on the vertical axis.

3. The oilfield benefit depreciation evaluation method based on charts according to claim 1, characterized in that, Obtain the oil loss per ton and loss rate of the oilfield to be evaluated, including: Obtain depletion-related information for the oilfield to be evaluated, including: net asset value, depletion amount, current production of the oilfield, and SEC reserves; The loss per ton and loss rate of the oilfield to be evaluated are calculated based on the loss information of the oilfield to be evaluated.

4. The oilfield benefit depreciation evaluation method based on charts according to claim 1, characterized in that, Establish depletion zoning standards based on historical depletion data of the oilfield, including: Based on historical oilfield loss data, oilfield loss is divided into low loss zone, medium loss zone, high loss zone, and full loss zone.

5. The oilfield benefit depreciation evaluation method based on charts according to claim 4, characterized in that, The evaluation criterion for the low loss zone is: (loss per ton of oil + loss rate) < 0.15; The evaluation criterion for the medium loss zone is: 0.15 ≤ (loss per ton of oil + loss rate) < 0.5; The evaluation criterion for the high loss zone is: 0.5 ≤ (oil loss per ton + loss rate) < 1; The evaluation criterion for the total loss zone is: loss rate = 1.

6. The oilfield benefit depreciation evaluation method based on charts according to claim 3, characterized in that, The depletion rate D is calculated as follows: The method for calculating the SEC reserves is as follows: in, For current production, denoted as SEC reserves, n as the decreasing characteristic value, and t as the economic mining life in months.

7. The oilfield benefit depreciation evaluation method based on charts according to claim 3, characterized in that, The formula for calculating the fuel consumption per ton of oil is: Oil consumption per ton = Consumption amount / Current production The depletion amount is calculated as the product of the net asset value and the depletion rate, with the unit being RMB 10,000 per ton.

8. The oilfield benefit depreciation evaluation method based on charts according to claim 1, characterized in that, Establish depletion zoning standards based on historical depletion data of the oilfield, including: Historical depletion data of the oilfield is obtained, and descriptive statistics are performed on the historical depletion data to obtain data distribution and variability. Regression analysis is conducted on the relationship between the statistical results of the historical depletion data and reserves to establish an evaluation model. Based on the evaluation model, depletion zoning criteria are defined.

9. A depletion control method for improving oilfield efficiency, characterized in that, Includes the following steps: The depletion zoning results of the oilfield to be evaluated are obtained by using the map-based oilfield benefit depletion evaluation method according to any one of claims 1-8; Based on the depletion partitioning results, corresponding depletion control strategies are adopted.

10. The depletion control method for improving oilfield efficiency according to claim 9, characterized in that, Based on the aforementioned depletion partitioning results, corresponding depletion control strategies are adopted, including: When the depletion partitioning result shows a low depletion zone, the depletion control strategy is to stabilize the development effect to maintain the depletion level. When the depletion partitioning result is displayed as the medium depletion zone, the depletion control strategy is: improve development effect to stabilize depletion level; When the depletion partitioning result shows a high depletion zone, the depletion control strategy is to change the development method to reduce the depletion level; When the depletion zoning result shows a full depletion zone, the depletion control strategy is: to conduct development trials or reserve development technology based on oil prices.

11. A chart-based oilfield benefit depreciation evaluation device, the device being used to implement the method as described in any one of claims 1 to 8, characterized in that, include: The chart construction module is configured to create an oilfield benefit depreciation evaluation chart based on oil consumption per ton and consumption rate. The zoning standard construction module is configured to establish depletion zoning standards by combining historical depletion data of the oilfield. The information acquisition module is configured to acquire the oil consumption per ton and the consumption rate of the oilfield to be evaluated. The evaluation module is configured to project the oil loss per ton and loss rate of the oilfield to be evaluated onto the evaluation map, and obtain the loss zoning results of the oilfield to be evaluated based on the loss zoning standard.

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