Methods, apparatus, equipment and media for dynamic assessment of oil and gas reserves containing multiple light hydrocarbons

Abstract

This application discloses a method, apparatus, equipment, and medium for dynamic assessment of oil and gas reserves containing multiple light hydrocarbons. The method includes: determining the types of light hydrocarbons in the target product; determining relevant calculation items for each type of light hydrocarbon based on its economic limit point content, price excluding VAT, unit tax, and commodity rate; determining the economic limit production of the main product phase by combining other relevant calculation items of the target product; calculating the cutoff point based on the economic limit production, initial point production, and decline rate of the main product phase; and assessing the reserves of each product phase based on its initial point production, decline rate, and cutoff point. This scheme can determine the relevant calculation items for each type of light hydrocarbon based on its specific classification, and incorporate them into the calculation of the economic limit production of the target product, thereby achieving refined calculation, improving the accuracy of the economic limit production calculation of the target product, and thus improving the accuracy of reserve assessment.

Description

Technical Field

[0001] This application relates to the field of oil and gas exploration technology, and in particular to a method, apparatus, equipment and medium for dynamic assessment of oil and gas reserves containing multiple light hydrocarbons. Background Technology

[0002] Oil and gas reserves are the material basis and core asset for oil companies' development, production, and operational decisions, and also an important indicator of their market value and development potential. The prices of different oil and gas product phases vary significantly. However, currently, oil and gas product components with different prices are uniformly classified as primary oil and gas products for reserve statistics. This one-size-fits-all approach to reserve calculation leads to inaccurate oil and gas reserve estimates. Summary of the Invention

[0003] This application provides a method, apparatus, equipment, and medium for dynamic assessment of oil and gas reserves containing various light hydrocarbons, so as to calculate oil and gas reserves more accurately and precisely.

[0004] According to one aspect of this application, a method for dynamic assessment of oil and gas reserves containing multiple light hydrocarbons is provided, the method comprising:

[0005] Determine the type of light hydrocarbons contained in the target product; wherein the target product includes crude oil or gas reservoir gas; if the target product is crude oil, the main product phase is crude oil, and the by-product phase includes dissolved gas and light hydrocarbons; if the target product is gas reservoir gas, the main product phase is gas reservoir gas, and the by-product phase includes condensate oil and light hydrocarbons; the type of light hydrocarbons includes stabilized light hydrocarbons, liquefied petroleum gas (LPG), and liquid ethane.

[0006] Based on the economic limit point content, price excluding VAT, unit tax and fee, and commodity rate of various light hydrocarbons, the relevant calculation items for various light hydrocarbons are determined, and based on the relevant calculation items for various light hydrocarbons and other relevant calculation items for the target product, the economic limit output of the main product phase is determined.

[0007] The cutoff point is calculated based on the economic limit production of the main product phase, the initial production of the main product phase, and the decline rate of the main product phase. The reserves of each product phase are then assessed based on the initial production, decline rate, and cutoff point of each product phase in the target product.

[0008] According to one aspect of this application, a dynamic assessment device for oil and gas reserves containing multiple light hydrocarbons is provided, the device comprising:

[0009] The light hydrocarbon type determination module is used to determine the type of light hydrocarbons contained in the target product; wherein, the target product includes crude oil or gas reservoir gas; if the target product is crude oil, the main product phase is crude oil, and the by-product phase includes dissolved gas and light hydrocarbons; if the target product is gas reservoir gas, the main product phase is gas reservoir gas, and the by-product phase includes condensate oil and light hydrocarbons; the light hydrocarbon type includes stabilized light hydrocarbons, liquefied petroleum gas (LPG), and liquid ethane;

[0010] The economic limit production determination module is used to determine the relevant calculation items for various light hydrocarbons based on their economic limit point content, price excluding VAT, unit tax and fees, and commodity rate, and to determine the economic limit production of the main product phase based on the relevant calculation items for various light hydrocarbons and other relevant calculation items for the target product.

[0011] The target product reserve determination module is used to calculate the cutoff point based on the economic limit production of the main product phase, the initial point production of the main product phase, and the decline rate of the main product phase, and to evaluate the reserves of each product phase based on the initial point production, decline rate, and cutoff point of each product phase in the target product.

[0012] According to another aspect of this application, an electronic device is provided, the electronic device comprising:

[0013] At least one processor; and

[0014] A memory that is communicatively connected to at least one processor; wherein,

[0015] The memory stores a computer program that can be executed by at least one processor, such that the at least one processor is able to execute the dynamic assessment method for oil and gas reserves containing a variety of light hydrocarbons according to any embodiment of this application.

[0016] According to another aspect of this application, a computer-readable storage medium is provided, which stores computer instructions for causing a processor to execute and implement the dynamic assessment method for oil and gas reserves containing various light hydrocarbons according to any embodiment of this application.

[0017] The technical solution of this application embodiment determines the type of light hydrocarbons contained in the target product; wherein, the target product includes crude oil or gas reservoir gas; if the target product is crude oil, the main product phase is crude oil, and the by-product phase includes dissolved gas and light hydrocarbons; if the target product is gas reservoir gas, the main product phase is gas reservoir gas, and the by-product phase includes condensate oil and light hydrocarbons; the type of light hydrocarbons includes stable light hydrocarbons, liquefied petroleum gas (LPG), and liquid ethane; based on the economic limit point content, price excluding VAT, unit tax, and commodity rate of various light hydrocarbons, the relevant calculation items for various light hydrocarbons are determined, and based on the relevant calculation items for various light hydrocarbons and other relevant calculation items for the target product, the economic limit production of the main product phase is determined; based on the economic limit production of the main product phase, the initial point production of the main product phase, and the decline rate of the main product phase, the cutoff point is calculated, and the reserves of each product phase are evaluated based on the initial point production, decline rate, and cutoff point of each product phase in the target product. The above scheme can determine the relevant calculation items for each type of light hydrocarbon based on the specific classification of light hydrocarbons, and participate in the calculation of the economic limit production of the target product, thereby achieving refined and fine-grained calculation, improving the accuracy of the calculation of the economic limit production of the target product, and thus improving the accuracy of reserve assessment.

[0018] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A flowchart illustrating a method for dynamic assessment of oil and gas reserves containing multiple light hydrocarbons, provided for embodiments of this application;

[0021] Figure 2 Another embodiment of this application provides a flowchart of a method for dynamic assessment of oil and gas reserves containing multiple light hydrocarbons;

[0022] Figure 3 A flowchart of a method for dynamic assessment of oil and gas reserves containing multiple light hydrocarbons, provided as another embodiment of this application;

[0023] Figure 4 A schematic diagram showing the result of yet another embodiment of this application;

[0024] Figure 5A schematic diagram of the structure of a dynamic assessment device for oil and gas reserves containing multiple light hydrocarbons provided in this application embodiment;

[0025] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0027] It should be noted that the terms "first," "second," "third," "fourth," "actual," "preset," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] Figure 1 This application provides a flowchart of a method for dynamically assessing oil and gas reserves containing multiple light hydrocarbons, applicable to situations involving the dynamic assessment of oil and gas reserves containing multiple light hydrocarbon products. This method can be executed by a device for dynamically assessing oil and gas reserves containing multiple light hydrocarbons, which can be implemented in hardware and / or software and can be configured in electronic equipment. Figure 1 As shown, the method includes:

[0029] S110. Determine the type of light hydrocarbons contained in the target product; wherein the target product includes crude oil or gas reservoir gas; if the target product is crude oil, the main product phase is crude oil, and the by-product phase includes dissolved gas and light hydrocarbons; if the target product is gas reservoir gas, the main product phase is gas reservoir gas, and the by-product phase includes condensate oil and light hydrocarbons; the type of light hydrocarbons includes stabilized light hydrocarbons, liquefied petroleum gas (LPG), and liquid ethane.

[0030] The target product includes crude oil or gas reservoir gas. If the target oil and gas field is a crude oil producing field, the target product is crude oil. If the target oil and gas field is a gas reservoir gas producing field, the target product is gas reservoir gas. If the target product is crude oil, the main product phase is crude oil, and the by-product phases include dissolved gas and light hydrocarbons; if the target product is gas reservoir gas, the main product phase is gas reservoir gas, and the by-product phases include condensate and light hydrocarbons. Light hydrocarbon types include stable light hydrocarbons, liquefied petroleum gas (LPG), and liquid ethane. Stable light hydrocarbons are liquid hydrocarbons with C5 or higher carbon content that precipitate after cooling and condensation; LPG is mainly composed of C3 and C4 carbons that precipitate after compression and pressurization; and liquid ethane is liquid hydrocarbons that precipitate after further cooling and condensation.

[0031] The target product may contain light hydrocarbons, which have a higher price advantage compared to crude oil and gas reservoir gas. Simply including light hydrocarbons in the calculation of crude oil or gas reservoir gas would obscure this price advantage, leading to inaccurate calculations of the economic limit production and consequently affecting the reserve calculation results. In this application embodiment, the light hydrocarbons contained in the target product are identified, and the types of light hydrocarbons included are determined—specifically, types containing at least one of stable light hydrocarbons, liquefied petroleum gas (LPG), and liquid ethane—to more accurately calculate the economic limit production for various types of light hydrocarbons and their value. Specifically, during actual extraction, for the target product produced in the extraction area, the presence, content, and type of light hydrocarbons in the target product can be determined through detection. This allows for the acquisition of data on light hydrocarbons in the target product of the extraction area, facilitating subsequent calculations. Furthermore, this increases the reserves of light hydrocarbons themselves and improves the crude oil and gas reservoir gas reserves obtained by including light hydrocarbons in the economic limit calculation.

[0032] In this embodiment, the electronic device can actively obtain the light hydrocarbons contained in the target product and the type of light hydrocarbons from other platforms, servers, terminals, etc. This information can be input by the user, or actively sent to the electronic device by other platforms, servers, terminals, etc., or the electronic device can identify the light hydrocarbons contained in the target product and determine the type of light hydrocarbons by recognizing the image of the target product.

[0033] S120. Based on the economic limit point content, price excluding VAT, unit tax and fee, and commodity rate of various light hydrocarbons, determine the relevant calculation items for various light hydrocarbons, and based on the relevant calculation items for various light hydrocarbons and other relevant calculation items for the target product, determine the economic limit output of the main product phase.

[0034] The economic limit production rate refers to the point at which, during oilfield development, the after-tax output of an oil well equals its operating costs when the water cut reaches a specific value. The output at this point is called the economic limit oil (gas) production. If the water cut continues to rise, the oil well will not be profitable and may even incur losses. For example, the economic limit content, price excluding VAT, unit tax, and commodity rate of various light hydrocarbons are fixed and correspond to specific light hydrocarbon types. Therefore, after determining the type of light hydrocarbons included in the target product, the corresponding economic limit content, price excluding VAT, unit tax, and commodity rate for each light hydrocarbon type can be obtained. Based on these parameters, the relevant calculation items for various light hydrocarbons can be calculated. Specifically, staff can pre-enter the correspondence between light hydrocarbon types and their economic limit content, price excluding VAT, unit tax, and commodity rate. After determining the type of light hydrocarbons in the target product, the corresponding parameters for each light hydrocarbon type can be determined through this correspondence. Alternatively, after determining the type of light hydrocarbon, the data can be input into a pre-trained large model, and the corresponding economic limit point content, price excluding VAT, unit tax, and commodity rate can be retrieved based on prompts. Based on these parameters, relevant calculation items for various light hydrocarbons are calculated, thus refining the contribution of different light hydrocarbon types to the economic limit production calculation, thereby more accurately determining the economic limit production of the target product.

[0035] For example, after extracting light hydrocarbons from the target product and calculating their relevant calculation items separately, other relevant calculation items in the target product also change accordingly. Other relevant calculation items of the target product can be adaptively determined, and the economic limit output of the target product can be determined based on the relevant calculation items of light hydrocarbons and other relevant calculation items of the target product.

[0036] The beneficial effect of the above scheme is that, since the economic value of light hydrocarbons is generally higher than that of crude oil or gas reservoirs, if light hydrocarbons are uniformly regarded as crude oil or gas reservoirs and the economic limit production is calculated based on the economic value of crude oil or gas reservoirs, the calculated economic limit production will be too high. However, in this scheme, light hydrocarbons are extracted and the relevant calculation items for each type of light hydrocarbon are calculated separately and participated in the calculation of the economic limit production of the target product. This allows for targeted and refined calculation, fully considers the difference in economic value between light hydrocarbons and crude oil or gas reservoirs, reduces the economic limit production of the target product, and thus improves the accuracy of the calculation of the economic limit production of the target product.

[0037] S130. Calculate the cutoff point based on the economic limit production of the main product phase, the initial production of the main product phase, and the decline rate of the main product phase. Evaluate the reserves of each product phase based on the initial production, decline rate, and cutoff point of each product phase in the target product.

[0038] For example, calculating the reserves of a target product requires determining the initial point production, decline rate, and cutoff point. The cutoff point calculation needs to consider the economic limit production of the target product. Based on the economic limit production of the main product phase calculated in the above scheme, combined with the initial point production and decline rate of the main product phase, the cutoff point can be accurately determined. That is, based on the initial point production and the decline rate, the time it takes for the initial point production to decrease to the economic limit production based on the decline rate is determined. For each product phase included in the target product, the reserves of each product phase are assessed separately based on the initial point production, decline rate, and cutoff point. If the target product is crude oil, the product composition includes: crude oil, dissolved gas, and light hydrocarbons. If the target product is gas embankment gas, the product composition includes: gas embankment gas, condensate, and light hydrocarbons. Because the above scheme improves the accuracy of obtaining the economic limit production of the target product, it also improves the accuracy of the cutoff point, thereby improving the accuracy of the target product reserve assessment and providing more accurate and referential guidance for the production and exploitation process of oil and gas fields.

[0039] The technical solution of this application embodiment determines the type of light hydrocarbons contained in the target product; wherein, the target product includes crude oil or gas reservoir gas; if the target product is crude oil, the main product phase is crude oil, and the by-product phase includes dissolved gas and light hydrocarbons; if the target product is gas reservoir gas, the main product phase is gas reservoir gas, and the by-product phase includes condensate oil and light hydrocarbons; the type of light hydrocarbons includes stable light hydrocarbons, liquefied petroleum gas (LPG), and liquid ethane; based on the economic limit point content, price excluding VAT, unit tax, and commodity rate of various light hydrocarbons, the relevant calculation items for various light hydrocarbons are determined, and based on the relevant calculation items for various light hydrocarbons and other relevant calculation items for the target product, the economic limit production of the main product phase is determined; based on the economic limit production of the main product phase, the initial point production of the main product phase, and the decline rate of the main product phase, the cutoff point is calculated, and the reserves of each product phase are evaluated based on the initial point production, decline rate, and cutoff point of each product phase in the target product. The above scheme can determine the relevant calculation items for each type of light hydrocarbon based on the specific classification of light hydrocarbons, and participate in the calculation of the economic limit production of the target product, thereby achieving refined and fine-grained calculation, improving the accuracy of the calculation of the economic limit production of the target product, and thus improving the accuracy of reserve assessment.

[0040] Figure 2 This document provides a flowchart of a method for dynamically assessing oil and gas reserves containing multiple light hydrocarbons, as another embodiment of this application. This embodiment is an optimization based on the above embodiment; schemes not described in detail in this embodiment are described in the above embodiment. Figure 2 As shown, the method in this embodiment of the application specifically includes the following steps:

[0041] S210. Determine the type of light hydrocarbons contained in the target product; wherein the target product includes crude oil or gas reservoir gas; if the target product is crude oil, the main product phase is crude oil, and the by-product phase includes dissolved gas and light hydrocarbons; if the target product is gas reservoir gas, the main product phase is gas reservoir gas, and the by-product phase includes condensate oil and light hydrocarbons; the type of light hydrocarbons includes stabilized light hydrocarbons, liquefied petroleum gas (LPG), and liquid ethane.

[0042] S220. For various types of light hydrocarbons, determine the revenue price of the light hydrocarbons based on the difference between the price of the light hydrocarbons excluding value-added tax and the unit tax.

[0043] For example, for various types of light hydrocarbons, the difference between the price of light hydrocarbons excluding VAT and the unit tax can be used as the revenue price of light hydrocarbons.

[0044] S230. Determine the calculation items for this type of light hydrocarbon based on the product of the economic limit point content, commodity rate, and revenue price.

[0045] For example, the product of the economic limit point content, commodity rate, and revenue price of light hydrocarbons can be calculated as a relevant calculation item for that type of light hydrocarbon.

[0046] S240. The sum of the calculation items for each type of light hydrocarbon is taken as the relevant calculation item for each type of light hydrocarbon.

[0047] For example, for the various light hydrocarbons contained in the target product, the sum of the calculation items for each type of light hydrocarbon is used as the relevant calculation item for each type of light hydrocarbon, and the relevant calculation items for each type of light hydrocarbon are included in the calculation of the economic limit output of the target product.

[0048] S250. Based on the relevant calculation items for various light hydrocarbons and other relevant calculation items for the target product, determine the economic limit production of the main product phase.

[0049] In this embodiment of the application, the economic limit production of the main product phase is determined based on relevant calculation items for various light hydrocarbons and other relevant calculation items for the target product, including:

[0050] If the target product is crude oil, the economic limit production of the crude oil is determined based on the relevant calculation items for various light hydrocarbons, the relevant calculation items for dissolved gases, and the relevant calculation items for crude oil excluding light hydrocarbons and dissolved gases.

[0051] If the target product is gas layer gas, the economic limit production of the gas layer gas is determined based on the relevant calculation items for various light hydrocarbons, the relevant calculation items for condensate oil, and the relevant calculation items for gas layer gas other than light hydrocarbons and condensate oil.

[0052] For example, if the target product is crude oil, gaseous layers may be released during the extraction process due to pressure changes. For dissolved gases in crude oil, relevant calculation items can be calculated separately. After determining the relevant calculation items for various light hydrocarbons and dissolved gases, the relevant calculation items for crude oil, excluding light hydrocarbons and dissolved gases, can be calculated. Based on the economic limit point calculation parameters for various light hydrocarbons, the relevant calculation items for dissolved gases, and the relevant calculation items for crude oil excluding light hydrocarbons and dissolved gases, the economic limit production of crude oil can be determined.

[0053] If the target product is gas-bearing methane, condensate oil may be generated during the extraction process due to pressure changes. The relevant calculation items for condensate oil can be calculated separately. After determining the relevant calculation items for various light hydrocarbons and condensate oil, the relevant calculation items for gas-bearing methane other than light hydrocarbons and condensate oil can be determined. Based on the economic limit point calculation parameters for various light hydrocarbons, the relevant calculation items for condensate oil, and the relevant calculation items for gas-bearing methane other than light hydrocarbons and condensate oil, the economic limit production of gas-bearing methane can be calculated.

[0054] In this embodiment of the application, the economic limit production of the crude oil is determined based on relevant calculation items for various light hydrocarbons, relevant calculation items for dissolved gases, and relevant calculation items for the crude oil excluding the light hydrocarbons and dissolved gases, including:

[0055] Based on the economic limit point gasoline ratio, the gas sales price excluding VAT, the unit gas layer gas tax and fees, and the marketable gas commodity rate, the relevant calculation items for gas layer gas extracted from the crude oil are determined;

[0056] Based on the crude oil price excluding VAT, unit oil tax, unit oil variable cost, and crude oil commodity rate, determine the relevant calculation items for the crude oil, excluding the light hydrocarbons and dissolved gases.

[0057] The relevant calculation items for various light hydrocarbons, the relevant calculation items for dissolved gases, and the relevant calculation items for crude oil (excluding light hydrocarbons and dissolved gases) are summed. Based on the ratio of the fixed cost of crude oil to the sum, the economic limit production of crude oil is determined.

[0058] For example, the economic limit production of crude oil can be calculated based on the following formula:

[0059]

[0060] In the formula: Q o.f Crude oil economic limit production, t / mon; gasoline motor octane number, t in tons. F.o For fixed costs of crude oil, ¥ / mon; ¥ represents the price. P o The price of crude oil is excluding VAT, in ¥ / t; T oUnit oil tax (total taxes excluding VAT), ¥ / t; C V.o The variable cost per unit of oil is ¥ / t; S o R represents the crude oil commodity rate. gf The economic limit point for the gas-oil ratio is 103m. 3 / t;P g The selling price of gas is excluding VAT, ¥ / 103m 3 ;T g Taxes and fees per unit of gas layer (total taxes excluding VAT), ¥ / 103m 3 S g R represents the marketable gas commodity rate; i represents the i-th type of light hydrocarbon, i = 1, 2, ..., n, generally n is at most 3 (i.e., 3 types of light hydrocarbons: ① stable light hydrocarbons with C5 or higher, ② liquefied petroleum gas mainly composed of C3 and C4, ③ liquid ethane); NGLfi P represents the economic limit point content of the i-th type of light hydrocarbon, dimensionless; NGLi The price of light hydrocarbons in category i, excluding VAT, is ¥ / t; T NGLi The unit tax for light hydrocarbons of type i is ¥ / t; S NGLi Let be the commodity rate of the i-th type of light hydrocarbons.

[0061] Among them (P) o -T o )S o -C V.o For the relevant calculation items of the crude oil other than the light hydrocarbons and dissolved gases, R gf (P g -T g )S g For calculation items related to gas-bearing strata gas precipitated from crude oil, These are the relevant calculation items for various light hydrocarbons and the relevant calculation items for dissolved gases.

[0062] In this embodiment of the application, the economic limit production of the gas-bearing gas is determined based on relevant calculation items for various light hydrocarbons, relevant calculation items for the condensate oil, and relevant calculation items for gas-bearing gas other than the light hydrocarbons and condensate oil, including:

[0063] The relevant calculation items for the condensate are determined based on the condensate content at the economic limit point, the condensate tax excluding VAT, the tax per unit of condensate, and the condensate commodity rate.

[0064] Based on the gas sales price excluding VAT, unit gas tax and fees, marketable gas commodity rate, and unit gas variable cost, determine the relevant calculation items for gas layer gas, excluding the light hydrocarbons and condensate oil mentioned above.

[0065] The relevant calculation items for various light hydrocarbons, the relevant calculation items for condensate oil, and the relevant calculation items for gas-bearing gas other than light hydrocarbons and condensate oil are summed. Based on the ratio of the fixed cost of gas-bearing gas to the sum, the economic limit production of gas-bearing gas is determined.

[0066] For example, the economic limit production of gas reservoirs can be calculated based on the following formula:

[0067]

[0068] In the formula: Q g.f The economically viable production limit for marketable gas is 103m³. 3 / mon;m 3 It is in cubic meters. C F.g For fixed costs of gas strata, ¥ / mon; P g The selling price of gas is excluding VAT, ¥ / 103m 3 ;T g Taxes and fees per unit of gas layer (total taxes excluding VAT), ¥ / 103m 3 S g C is the rate of saleable gas products; V.g Variable cost per unit of gas, ¥ / 103m 3 ;σ conf The condensate content at the economic limit point, t / 10³m 3 ;P con The price of condensate oil is excluding VAT, in ¥ / t; T con Taxes and fees per unit of condensate oil (total taxes excluding VAT), ¥ / t; S con σ represents the condensate oil commercial yield; i represents the i-th type of light hydrocarbon, i = 1, 2, ..., n, generally n is at most 3 (i.e., 3 types of light hydrocarbons: ① stable light hydrocarbons with C5 or more, ② liquefied petroleum gas mainly composed of C3 and C4, ③ liquid ethane); NGLfi The economic limit point content of type i light hydrocarbons, t / 10³m 3 ;P NGLi The price of light hydrocarbons in category i, excluding VAT, is ¥ / t; T NGLi The unit tax for light hydrocarbons of type i is ¥ / t; S NGLi Let be the commodity rate of the i-th type of light hydrocarbons.

[0069] in, This refers to the relevant calculation items for various light hydrocarbons. σ conf (P con -T con )S con For calculation items related to dissolved gases. (P) g -T g )S g -C V.gThe relevant calculation items for the crude oil, excluding the light hydrocarbons and dissolved gases.

[0070] S260. Calculate the cutoff point based on the economic limit production of the main product phase, the initial production of the main product phase, and the decline rate of the main product phase. Evaluate the reserves of each product phase based on the initial production, decline rate, and cutoff point of each product phase in the target product.

[0071] This application provides a method for dynamically assessing oil and gas reserves containing various light hydrocarbons. For each type of light hydrocarbon, the revenue price of the light hydrocarbon is determined based on the difference between its price excluding VAT and the unit tax. The calculation items for that type of light hydrocarbon are determined by multiplying its economic limit point content, commodity rate, and revenue price. The sum of the calculation items for each type of light hydrocarbon is used as the relevant calculation item for that type of light hydrocarbon. By refining the calculation items for each type of light hydrocarbon based on its parameters, the method comprehensively considers the role of light hydrocarbons of different values ​​in calculating the economic limit point value of the target product, thereby more accurately determining the economic limit output of the target product.

[0072] Figure 3 This is a flowchart illustrating a method for dynamically assessing oil and gas reserves containing multiple light hydrocarbons, provided as another embodiment of this application. This embodiment is an optimization based on the above embodiments; schemes not described in detail in this embodiment are found in the above embodiments. Figure 3 As shown, the method in this embodiment of the application specifically includes the following steps:

[0073] S310. Determine the type of light hydrocarbons contained in the target product; wherein the target product includes crude oil or gas reservoir gas; if the target product is crude oil, the main product phase is crude oil, and the by-product phase includes dissolved gas and light hydrocarbons; if the target product is gas reservoir gas, the main product phase is gas reservoir gas, and the by-product phase includes condensate oil and light hydrocarbons; the type of light hydrocarbons includes stable light hydrocarbons, liquefied petroleum gas (LPG), and liquid ethane.

[0074] S320. Based on the economic limit point content, price excluding VAT, unit tax and fee, and commodity rate of various light hydrocarbons, determine the relevant calculation items for various light hydrocarbons, and based on the relevant calculation items for various light hydrocarbons and other relevant calculation items for the target product, determine the economic limit output of the main product phase.

[0075] S330. Determine the decline rate of the main product phase based on the correspondence between historical production time and the output of the main product phase.

[0076] For example, in actual production processes, historical production times and target product outputs can be statistically analyzed. The output of the target product at future times can be predicted using certain forecasting methods, thus determining the correspondence between future outputs and target product outputs, i.e., determining the decline rate. Forecasting methods include, but are not limited to, training a neural network based on historical production times and target product outputs to obtain an output prediction model, and then predicting future target product outputs based on this model, thereby establishing the correspondence between future outputs and target product outputs. This correspondence between future outputs and target product outputs can be dynamic and subject to real-time changes. Due to the real-time changes in the actual conditions of oil and gas fields and the development of extraction technologies, the target product output may not be accurately predicted in a single instance. Therefore, the predicted correspondence between future outputs and target product outputs can be adaptively adjusted based on the current situation.

[0077] S340. Determine the time from the initial point output to the economic limit output based on the decline rate as the cutoff point for calculating the reserves of the main product phase.

[0078] For example, when the production of the main product phase reaches the economic limit, it indicates that it is no longer profitable to continue mining, and this point can be taken as the cutoff point. Specifically, the future time corresponding to when the initial production decreases to the economic limit based on the decline rate is determined, and this future time is used as the cutoff point for calculating the reserves of the main product phase.

[0079] S350. Determine the initial output based on the output of each product phase in the target product before the assessment reference date, and determine the decline rate of each product phase based on the decline trend of each product phase in the assessment unit.

[0080] For example, the initial point production can be determined based on the production of each product phase in the target product before the assessment reference date. That is, the initial point production of the target product reserves in the time dimension can be calculated. The decline rate can be determined based on the decline trend of the assessed oil and gas field, reflecting the downward trend of the target product production.

[0081] S360. Evaluate the reserves of each product phase based on the initial yield of each product phase, the decline rate of each product phase, and the cutoff point.

[0082] For example, the initial yield, decline rate, and cutoff point of each product phase can be input into the reserve assessment software to assess the reserves of each product phase.

[0083] Figure 4 This is a schematic diagram illustrating the results of an embodiment of this application. LH-1 to LH-7 represent seven different oil and gas fields. From Figure 4As can be seen from the present application, the economic limit of production is significantly reduced, the reserves are significantly increased, the accuracy of reserve assessment is improved, and accurate guidance is provided for subsequent mining.

[0084] This application provides a method for dynamic assessment of oil and gas reserves containing multiple light hydrocarbons. Based on the historical correlation between production time and the yield of the main product phase, the decline rate of the main product phase is determined. The time from the initial point yield to the economic limit yield based on the decline rate is determined as the cutoff point for calculating the reserves of the main product phase. The initial point yield is determined based on the yield of each product phase in the target product before the assessment reference date. The decline rate of each product phase is determined based on the decline trend of each product phase in the assessment unit. The reserves of each product phase are assessed based on the initial point yield, the decline rate, and the cutoff point. This method can accurately determine the time period corresponding to the reserve calculation by calculating the cutoff point based on the accurate economic limit yield of the target product, thereby improving the accuracy of reserve assessment.

[0085] Figure 5 This is a schematic diagram of a dynamic assessment device for oil and gas reserves containing multiple light hydrocarbons, provided as an embodiment of this application. This device can execute the dynamic assessment method for oil and gas reserves containing multiple light hydrocarbons provided in any embodiment of this application, and possesses the corresponding functional modules and beneficial effects for executing the method. Figure 5 As shown, the device includes:

[0086] The light hydrocarbon type determination module 410 is used to determine the type of light hydrocarbons contained in the target product; wherein, the target product includes crude oil or gas reservoir gas; if the target product is crude oil, the main product phase is crude oil, and the by-product phase includes dissolved gas and light hydrocarbons; if the target product is gas reservoir gas, the main product phase is gas reservoir gas, and the by-product phase includes condensate oil and light hydrocarbons; the light hydrocarbon type includes stable light hydrocarbons, liquefied petroleum gas (LPG), and liquid ethane;

[0087] The economic limit production determination module 420 is used to determine the relevant calculation items for various light hydrocarbons based on their economic limit point content, price excluding value-added tax, unit tax and fee, and commodity rate, and to determine the economic limit production of the main product phase based on the relevant calculation items for various light hydrocarbons and other relevant calculation items for the target product.

[0088] The target product reserve determination module 430 is used to calculate the cutoff point based on the economic limit production of the main product phase, the initial point production of the main product phase, and the decline rate of the main product phase, and to evaluate the reserves of each product phase based on the initial point production, decline rate, and cutoff point of each product phase in the target product.

[0089] In this embodiment, the economic limit production determination module 420 determines the relevant calculation items for various light hydrocarbons based on their economic limit point content, price excluding VAT, unit tax, and commodity rate, including:

[0090] For various types of light hydrocarbons, the revenue price of the light hydrocarbons is determined based on the difference between the price of the light hydrocarbons excluding value-added tax and the unit tax.

[0091] The calculation items for this type of light hydrocarbon are determined by multiplying the economic limit point content, commodity rate, and revenue price.

[0092] The sum of the calculation items for each type of light hydrocarbon is taken as the relevant calculation item for each type of light hydrocarbon.

[0093] In this embodiment, the economic limit production determination module 420 determines the economic limit production of the main product phase based on relevant calculation items for various light hydrocarbons and other relevant calculation items for the target product, including:

[0094] If the target product is crude oil, the economic limit production of the crude oil is determined based on the relevant calculation items for various light hydrocarbons, the relevant calculation items for dissolved gases, and the relevant calculation items for crude oil excluding light hydrocarbons and dissolved gases.

[0095] If the target product is gas layer gas, the economic limit production of the gas layer gas is determined based on the relevant calculation items for various light hydrocarbons, the relevant calculation items for condensate oil, and the relevant calculation items for gas layer gas other than light hydrocarbons and condensate oil.

[0096] In this embodiment, the economic limit production determination module 420 determines the economic limit production of crude oil based on relevant calculation items for various light hydrocarbons, relevant calculation items for dissolved gases, and relevant calculation items for crude oil other than light hydrocarbons and dissolved gases, including:

[0097] Based on the economic limit point gasoline ratio, the gas sales price excluding VAT, the unit gas layer gas tax and fees, and the marketable gas commodity rate, the relevant calculation items for gas layer gas extracted from the crude oil are determined;

[0098] Based on the crude oil price excluding VAT, unit oil tax, unit oil variable cost, and crude oil commodity rate, determine the relevant calculation items for the crude oil, excluding the light hydrocarbons and dissolved gases.

[0099] The relevant calculation items for various light hydrocarbons, the relevant calculation items for dissolved gases, and the relevant calculation items for crude oil (excluding light hydrocarbons and dissolved gases) are summed. Based on the ratio of the fixed cost of crude oil to the sum, the economic limit production of crude oil is determined.

[0100] In this embodiment of the application, the economic limit production determination module 420 determines the economic limit production of the gas layer gas based on relevant calculation items for various light hydrocarbons, relevant calculation items for the condensate oil, and relevant calculation items for gas layer gas other than the light hydrocarbons and condensate oil, including:

[0101] The relevant calculation items for the condensate are determined based on the condensate content at the economic limit point, the condensate tax excluding VAT, the tax per unit of condensate, and the condensate commodity rate.

[0102] Based on the gas sales price excluding VAT, unit gas tax and fees, marketable gas commodity rate, and unit gas variable cost, determine the relevant calculation items for gas layer gas, excluding the light hydrocarbons and condensate oil mentioned above.

[0103] The relevant calculation items for various light hydrocarbons, the relevant calculation items for condensate oil, and the relevant calculation items for gas-bearing gas other than light hydrocarbons and condensate oil are summed. Based on the ratio of the fixed cost of gas-bearing gas to the sum, the economic limit production of gas-bearing gas is determined.

[0104] In this embodiment of the application, the target product reserve determination module 430 evaluates the reserves of each product phase based on the economic limit production of the target product, the initial point production of the target product, and the decline rate of the target product, and evaluates the cutoff point for the reserve calculation of each product phase, including:

[0105] The decline rate of the main product phase is determined based on the historical relationship between production time and the output of the main product phase.

[0106] The time from the initial point output to the economic limit output based on the decline rate is determined as the cutoff point for calculating the reserves of the main product phase.

[0107] In this embodiment of the application, the target product reserve determination module 430 evaluates the reserves of each product phase based on the initial point yield, decline rate, and cutoff point of each product phase in the target product, including:

[0108] The initial output is determined based on the output of each product phase in the target product before the assessment benchmark date, and the decline rate of each product phase is determined based on the decline trend of each product phase in the assessment unit.

[0109] The reserves of each product phase are assessed based on the initial yield, the decline rate of each product phase, and the cutoff point.

[0110] The oil and gas reserves dynamic assessment device containing multiple light hydrocarbons provided in this application embodiment can execute the oil and gas reserves dynamic assessment method containing multiple light hydrocarbons provided in any embodiment of this application, and has the corresponding functional modules and beneficial effects of the method.

[0111] Figure 6 A schematic diagram of an electronic device 10, which can be used to implement embodiments of this application, is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the application described and / or claimed herein.

[0112] like Figure 6 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 may also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0113] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0114] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, central processing unit (CPU), graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as dynamic assessment methods for oil and gas reserves containing multiple light hydrocarbons.

[0115] In some embodiments, the method for dynamically assessing oil and gas reserves containing multiple light hydrocarbons can be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the method for dynamically assessing oil and gas reserves containing multiple light hydrocarbons described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform the method for dynamically assessing oil and gas reserves containing multiple light hydrocarbons by any other suitable means (e.g., by means of firmware).

[0116] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0117] Computer programs used to implement the methods of this application may be written in any combination of one or more programming languages. These computer programs may be provided to the processor of a general-purpose computer, a special-purpose computer, or other programmable dynamic assessment device for oil and gas reserves containing multiple light hydrocarbons, such that when executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0118] In the context of this application, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0119] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0120] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0121] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0122] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired information of the technical solution of this application can be achieved, and this is not limited herein.

[0123] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A method for dynamic assessment of oil and gas reserves containing multiple light hydrocarbons, characterized in that, The method includes: Determine the type of light hydrocarbons contained in the target product; wherein the target product includes crude oil or gas reservoir gas; if the target product is crude oil, the main product phase is crude oil, and the by-product phase includes dissolved gas and light hydrocarbons; if the target product is gas reservoir gas, the main product phase is gas reservoir gas, and the by-product phase includes condensate oil and light hydrocarbons; the type of light hydrocarbons includes stabilized light hydrocarbons, liquefied petroleum gas (LPG), and liquid ethane. Based on the economic limit point content, price excluding VAT, unit tax and fee, and commodity rate of various light hydrocarbons, the relevant calculation items for various light hydrocarbons are determined, and based on the relevant calculation items for various light hydrocarbons and other relevant calculation items for the target product, the economic limit output of the main product phase is determined. The cutoff point is calculated based on the economic limit production of the main product phase, the initial production of the main product phase, and the decline rate of the main product phase. The reserves of each product phase are then assessed based on the initial production, decline rate, and cutoff point of each product phase in the target product.

2. The method according to claim 1, characterized in that, Based on the economic limit point content, price excluding VAT, unit tax, and commodity rate of various light hydrocarbons, the relevant calculation items for each type of light hydrocarbon are determined, including: For various types of light hydrocarbons, the revenue price of the light hydrocarbons is determined based on the difference between the price of the light hydrocarbons excluding value-added tax and the unit tax. The calculation items for this type of light hydrocarbon are determined by multiplying the economic limit point content, commodity rate, and revenue price. The sum of the calculation items for each type of light hydrocarbon is taken as the relevant calculation item for each type of light hydrocarbon.

3. The method according to claim 1, characterized in that, Based on the relevant calculation items for various light hydrocarbons and other relevant calculation items for the target product, the economic limit production of the main product phase is determined, including: If the target product is crude oil, the economic limit production of the crude oil is determined based on the relevant calculation items for various light hydrocarbons, the relevant calculation items for dissolved gases, and the relevant calculation items for crude oil excluding light hydrocarbons and dissolved gases. If the target product is gas layer gas, the economic limit production of the gas layer gas is determined based on the relevant calculation items for various light hydrocarbons, the relevant calculation items for condensate oil, and the relevant calculation items for gas layer gas other than light hydrocarbons and condensate oil.

4. The method according to claim 3, characterized in that, Based on the relevant calculation items for various light hydrocarbons, the relevant calculation items for dissolved gases, and the relevant calculation items for crude oil excluding light hydrocarbons and dissolved gases, the economic limit production of the crude oil is determined, including: The relevant calculation items for the dissolved gas are determined based on the economic limit point gasoline ratio, the sales price of gas excluding value-added tax, the unit gas layer gas tax and fees, and the commercial gas commodity rate. Based on the crude oil price excluding VAT, unit oil tax, unit oil variable cost, and crude oil commodity rate, determine the relevant calculation items for the crude oil, excluding the light hydrocarbons and dissolved gases. The relevant calculation items for various light hydrocarbons, the relevant calculation items for dissolved gases, and the relevant calculation items for crude oil (excluding light hydrocarbons and dissolved gases) are summed. Based on the ratio of the fixed cost of crude oil to the sum, the economic limit production of crude oil is determined.

5. The method according to claim 3, characterized in that, Based on the relevant calculation items for various light hydrocarbons, the relevant calculation items for the condensate oil, and the relevant calculation items for gas-bearing gas other than the light hydrocarbons and condensate oil, the economic limit production of the gas-bearing gas is determined, including: The relevant calculation items for the condensate are determined based on the condensate content at the economic limit point, the condensate tax excluding VAT, the tax per unit of condensate, and the condensate commodity rate. Based on the gas sales price excluding VAT, unit gas tax and fees, marketable gas commodity rate, and unit gas variable cost, determine the relevant calculation items for gas layer gas, excluding the light hydrocarbons and condensate oil mentioned above. The relevant calculation items for various light hydrocarbons, the relevant calculation items for condensate oil, and the relevant calculation items for gas-bearing gas other than light hydrocarbons and condensate oil are summed. Based on the ratio of the fixed cost of gas-bearing gas to the sum, the economic limit production of gas-bearing gas is determined.

6. The method according to claim 1, characterized in that, The cutoff point is calculated based on the economic limit output of the main product phase, the initial output of the main product phase, and the decline rate of the main product phase, including: The decline rate of the main product phase is determined based on the historical relationship between production time and the output of the main product phase. The time from the initial point output to the economic limit output based on the decline rate is determined as the cutoff point for calculating the reserves of the main product phase.

7. The method according to claim 1, characterized in that, The reserves of each product phase are assessed based on the initial point yield, decline rate, and cutoff point of each product phase in the target product, including: The initial output is determined based on the output of each product phase in the target product before the assessment benchmark date, and the decline rate of each product phase is determined based on the decline trend of each product phase in the assessment unit. The reserves of each product phase are assessed based on the initial yield, the decline rate of each product phase, and the cutoff point.

8. A dynamic assessment device for oil and gas reserves containing multiple light hydrocarbons, characterized in that, The device includes: The light hydrocarbon type determination module is used to determine the type of light hydrocarbons contained in the target product; wherein, the target product includes crude oil or gas reservoir gas; if the target product is crude oil, the main product phase is crude oil, and the by-product phase includes dissolved gas and light hydrocarbons; if the target product is gas reservoir gas, the main product phase is gas reservoir gas, and the by-product phase includes condensate oil and light hydrocarbons; the light hydrocarbon type includes stabilized light hydrocarbons, liquefied petroleum gas (LPG), and liquid ethane; The economic limit production determination module is used to determine the relevant calculation items for various light hydrocarbons based on their economic limit point content, price excluding VAT, unit tax and fees, and commodity rate, and to determine the economic limit production of the main product phase based on the relevant calculation items for various light hydrocarbons and other relevant calculation items for the target product. The target product reserve determination module is used to calculate the cutoff point based on the economic limit production of the main product phase, the initial point production of the main product phase, and the decline rate of the main product phase, and to evaluate the reserves of each product phase based on the initial point production, decline rate, and cutoff point of each product phase in the target product.

9. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the dynamic assessment method for oil and gas reserves containing multiple light hydrocarbons as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that cause a processor to execute the method for dynamic assessment of oil and gas reserves containing multiple light hydrocarbons as described in any one of claims 1-7.

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