A natural gas field development plan unit full cost measurement system and method

Abstract

This invention relates to the field of natural gas technology and economics, specifically to a system and method for calculating the unit full cost of a natural gas field development plan. The method involves: acquiring parameters of the natural gas field development plan, dividing these parameters into basic parameters and annual parameters; calculating the total cost, operating taxes, and surcharges of the natural gas field development plan based on these parameters; obtaining the full cost of the natural gas field development plan based on the total cost, operating taxes, and surcharges; calculating the unit full cost of the natural gas field development plan based on the obtained full cost; performing a sensitivity analysis on the unit full cost; and finally obtaining the results of the sensitivity analysis. The advantages of this invention are that it assists in the economic evaluation of natural gas field development plans, improves the effectiveness of investment, accelerates the process from planning to implementation of development plans, and reduces business risks.

Description

Technical Field

[0001] This invention relates to the field of natural gas technology and economics, specifically to a system and method for calculating the unit total cost of a natural gas field development scheme. Background Technology

[0002] In a series of upstream natural gas activities, exploration mainly involves resource surveys and evaluations; development is carried out through controlling technology and investment to achieve optimal natural gas production and economic benefits; generally, investment is carried out during the exploration and development process, and cost control will improve the economic efficiency of investment; in the economic evaluation of gas field development plans, many factors are involved, which can be specifically divided into technical and economic aspects.

[0003] In terms of technology, it is usually based on a series of technical assessments and implementation plans. These include geological resource endowment and its distribution characteristics, geological exploration technology and reserve proving technology, the production decline law of natural gas wells (different indicators and parameters for different projects), technology development investment, cost control technology, old gas well renovation technology, etc. During the pre-exploration and exploration processes, these technical factors affect the effectiveness of resource assessment and also have a significant impact on the subsequent development process.

[0004] In terms of economics, it is usually based on technological factors and incorporates more internal and external factors affecting the enterprise. Economic evaluation involves not only multi-level parameters and indicators, such as output, depreciation rate, price, cost, tax rate, subsidies, capital, interest rate, and financing methods, but also many indicators in the financial evaluation process, such as cash flow, capital flow, profit distribution, and balance sheet.

[0005] For example, a Chinese patent, application number 202410006684.X, application date January 2, 2024, entitled "A Digital Cost and Economic Data Analysis and Optimization Method and System," describes its technical solution as follows: The method includes standardizing investment cost data and economic evaluation data to establish standard evaluation templates and standard cost templates; establishing a prefabricated template for engineering economic analysis; calculating evaluation data and standard costs based on the standard evaluation templates and standard cost templates; establishing a data warehouse based on the evaluation data and standard costs according to a storage mechanism; comparing and analyzing indicators at different stages and dimensions of the project based on the data warehouse to obtain optimization targets for the liquefied natural gas project; and generating digital delivery documents for the procurement package based on the preliminary standard data in the data warehouse, combined with the standard evaluation template, standard cost template, and prefabricated template.

[0006] The aforementioned patents enable automatic data extraction, classification, storage, and application, and establish comparative analysis of different types of data. This helps to establish a complete data analysis process and solve the problems of data lag and interoperability. However, by only processing data interoperability, extraction, and storage, it can only provide rapid feedback on real market data and cannot obtain objective and regular conclusions through sensitivity analysis, thus serving as a reference solution to assist enterprises in conducting economic evaluation. Summary of the Invention

[0007] To address the problems existing in the prior art, this application provides a system and method for calculating the unit total cost of a natural gas field development plan, which can obtain objective and regular conclusions and assist enterprises in conducting economic evaluations of natural gas field development plans.

[0008] To achieve the above-mentioned technical effects, the technical solution of this application is as follows:

[0009] A system for calculating the unit total cost of a natural gas field development plan includes:

[0010] The natural gas field development plan parameter acquisition module is used to acquire parameters in the natural gas field development plan;

[0011] The total cost and expenses and business taxes and surcharges calculation module is used to calculate the total cost and expenses and business taxes and surcharges in the natural gas field development plan based on the parameters obtained from the natural gas field development plan.

[0012] The full cost calculation module is used to calculate the full cost based on the total cost and expenses and business taxes and surcharges obtained from the total cost and expenses and business taxes and surcharges calculation module.

[0013] The sensitivity analysis module is used to calculate the unit full cost of the natural gas field development plan based on the full cost obtained from the full cost calculation module, and then perform sensitivity analysis on the unit full cost to obtain the final sensitivity analysis results.

[0014] Furthermore, the total cost and expenses in the total cost and expenses and business taxes and surcharges calculation module include oil and gas production costs, management expenses, financial expenses, operating expenses and exploration expenses; the business taxes and surcharges in the total cost and expenses and business taxes and surcharges calculation module include urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue and mining rights transfer revenue.

[0015] Furthermore, the specific solution for calculating the total cost and operating taxes and surcharges in the natural gas field development plan is as follows: the total cost is the sum of oil and gas production costs, management expenses, financial expenses, operating expenses, and exploration expenses; the taxes and surcharges are the sum of urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue, and mining rights transfer revenue.

[0016] Furthermore, based on the parameters obtained from the natural gas field development plan, the specific process for calculating the total cost, expenses, business taxes, and surcharges in the natural gas field development plan is as follows:

[0017] In the formula, Indicates total cost; Indicates total cost and expenses;

[0018] This indicates business taxes and surcharges; Cap indicates the full cost calculation module.

[0019] The specific formula for calculating total cost is as follows:

[0020]

[0021] In the formula, Indicates the cost of oil and gas production; Indicates administrative expenses;

[0022] Indicates financial expenses; Indicates operating expenses; Indicates exploration costs;

[0023] The final formula for calculating the total cost is as follows:

[0024]

[0025] In the formula, This indicates business taxes and surcharges.

[0026] Furthermore, calculate the unit total cost of the natural gas field development plan. The specific method is to divide the total cost by the sum of the volume of natural gas, the amount of crude oil converted to natural gas equivalent, and the amount of by-products converted to natural gas equivalent.

[0027] Furthermore, the volume of natural gas commodities It is the sum of annual commodity production of natural gas; the crude oil to natural gas equivalent is the sum of annual commodity production of crude oil multiplied by the crude oil to natural gas equivalent ratio; the byproducts to natural gas equivalent is the sum of annual commodity production of byproducts multiplied by the byproducts to natural gas equivalent ratio; byproducts include condensate, sulfur, ethane, liquefied petroleum gas, stabilized light hydrocarbons and helium.

[0028] The sensitivity factors in the sensitivity analysis module are derived from: product price, product output, product operating cost, and product construction investment. The changes in product price, product output, product operating cost, or product construction investment are selected as the sensitivity factors for sensitivity analysis to conduct sensitivity analysis and obtain the final sensitivity analysis results.

[0029] Furthermore, the product prices include crude oil prices, natural gas prices, and condensate prices; where crude oil prices are measured in yuan / ton and US dollars / barrel, natural gas prices are measured in yuan / thousand cubic meters, and condensate prices are measured in yuan / ton; the product outputs include crude oil output, natural gas output, condensate output, sulfur output, ethane output, liquefied petroleum gas output, liquefied natural gas output, stabilized light hydrocarbon output, and helium output; where crude oil output, condensate output, sulfur output, ethane output, liquefied petroleum gas output, liquefied natural gas output, and stabilized light hydrocarbon output are all measured in tens of thousands of tons, natural gas output is measured in hundreds of millions of cubic meters, and helium output is measured in tens of thousands of cubic meters; the product operating costs include operating costs, rental fees, safety production costs, other management costs, and operating expenses; the product construction investment includes construction costs excluding value-added tax. The investment period includes: construction period investment (including VAT deduction), operation period investment (excluding VAT), and operation period investment (including VAT deduction); the construction period investment (excluding VAT) includes exploration investment, development well investment, and surface engineering investment (excluding VAT); the construction period investment (including VAT deduction) includes exploration investment, development well investment, and surface engineering investment (including VAT deduction); the operation period investment (excluding VAT) includes exploration investment, development well investment, and surface engineering investment (excluding VAT); and the operation period investment (including VAT deduction) includes exploration investment, development well investment, and surface engineering investment (including VAT deduction).

[0030] Furthermore, the change in product output was selected as the sensitivity factor for the sensitivity analysis, and the final sensitivity analysis results were obtained based on the following matrix:

[0031]

[0032] In the matrix, F represents an abstract index calculation function, α represents the percentage change in output with a precision of 0.1, and the subscript t represents the annual value; GFb represents the sensitivity analysis module; Cap represents the full cost calculation module; This represents the product output in year t multiplied by the percentage change, under the sensitivity analysis module. This indicates that, under the sensitivity analysis module, the product price, product operating cost, and product construction investment remained unchanged in year t. A high-level matrix representing changes in production output. The elements stored in this high-level matrix include total costs and expenses, oil and gas production costs, administrative expenses, financial expenses, operating expenses, exploration expenses, business taxes and surcharges, total costs, crude oil commodity volume, crude oil equivalent to natural gas, natural gas commodity volume, by-products equivalent to natural gas, condensate, sulfur, ethane, liquefied petroleum gas, liquefied natural gas, stabilized light hydrocarbons, helium, and unit total costs.

[0033] A method for calculating the unit total cost of a natural gas field development plan includes the following specific steps:

[0034] Step 1: Obtain the parameters for the natural gas field development plan, and divide the parameters into basic parameters and annual parameters;

[0035] Step 2: Based on the parameters obtained from the natural gas field development plan, calculate the total cost, expenses, business taxes, and surcharges of the natural gas field development plan;

[0036] Step 3: Obtain the full cost of the natural gas field development plan based on the total costs, expenses, business taxes and surcharges;

[0037] Step 4: Based on the total cost of the obtained natural gas field development plan, calculate the unit total cost of the natural gas field development plan, and then conduct a sensitivity analysis on the unit total cost to obtain the final results of the sensitivity analysis.

[0038] Furthermore, the parameters in step one include the production and sales price of natural gas and its by-products, tax rates and subsidies, investment during the construction period and VAT deduction, investment during the operation period and VAT deduction, operating costs, borrowing costs and financial expenses, interest rates and interest expenses, and special petroleum revenue.

[0039] Furthermore, in step one, the parameters include basic parameters and year-specific parameters. The basic parameters are introduced as scalar types, and the year-specific parameters are introduced as vector types. The specific matrix construction is as follows:

[0040]

[0041] In the formula, t represents time in years; T represents the total time spent on the evaluation period in years; a is the specific value of the basic parameter; a t Let t be the specific value of the annual parameter in year t.

[0042] Furthermore, the basic parameters are values ​​that do not change with the year during the evaluation period; the year-specific parameters are values ​​that change with the year during the evaluation period.

[0043] Furthermore, in step two, the total cost and expenses include oil and gas production costs, management expenses, financial expenses, operating expenses, and exploration expenses; business taxes and surcharges include urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue, and mining rights transfer revenue.

[0044] Furthermore, the specific solution for the total cost and operating taxes and surcharges of the natural gas field development plan is as follows: the total cost is the sum of oil and gas production costs, management expenses, financial expenses, operating expenses and exploration expenses; the taxes and surcharges are the sum of urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue and mining rights transfer revenue.

[0045] Furthermore, oil and gas production costs include operating costs, depreciation, and lease payments; administrative expenses include amortization of intangible assets, amortization of other assets, safety production costs, and other administrative expenses; financial expenses include amortization of intangible assets, amortization of other assets, safety production costs, and other administrative expenses; exploration costs include exploration investment costs during the construction period (including VAT) and exploration investment costs during the operation period (including VAT); and operating expenses are operating revenue multiplied by the ratio of operating expenses to operating revenue.

[0046] Furthermore, the annual parameters from step one, along with the total cost, expenses, taxes, and surcharges from step two, are input into the following auxiliary matrix B for calculation:

[0047]

[0048] In the matrix above, t represents time in years; T represents the total time spent during the evaluation period in years.

[0049] This indicates the specific amount invested each year; This indicates the annual investment, including the specific investment amount after depreciation; a t This represents the investment value in year t; a nt This represents the investment in year n, after depreciation in year t.

[0050] Store the calculation results obtained from the auxiliary matrix B, along with the basic parameters from step one, into the high-level matrix A:

[0051]

[0052] In the matrix above, the superscript indicators include oil and gas production costs, management expenses, financial expenses, operating expenses, exploration expenses, urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue, mining rights transfer revenue, output and sales price of natural gas and its by-products, tax rates and subsidies, construction period investment and VAT deduction, operation period investment and VAT deduction, operating costs, borrowing costs and financial expenses, and interest rates and interest expenses; the subscript modules refer to the modules to which the indicators belong, including natural gas field development scheme parameter acquisition module, total cost and operating tax and surcharge calculation module, full cost calculation module, and sensitivity analysis module; t represents time in years. This represents the specific value in year t under index 1 and module 3; This indicates the specific values ​​under indicator 2 and module 5; This indicates the specific values ​​under indicator 3 and module 7.

[0053] Furthermore, the specific formula for calculating the total cost in step three is as follows:

[0054]

[0055] In the formula, Indicates total cost; Indicates total cost and expenses;

[0056] This indicates business taxes and surcharges; Cap indicates the full cost calculation module.

[0057] The specific formula for calculating total cost is as follows:

[0058]

[0059] In the formula, Indicates the cost of oil and gas production; Indicates administrative expenses;

[0060] Indicates financial expenses; Indicates operating expenses; Indicates exploration costs;

[0061] The final formula for calculating the total cost is as follows:

[0062]

[0063] In the formula, This indicates business taxes and surcharges.

[0064] Furthermore, in step four, the unit total cost of the natural gas field development plan is calculated based on the obtained total cost of the natural gas field development plan. The specific solution is to divide the total cost by the sum of the quantity of natural gas, the amount of crude oil converted to natural gas equivalent, and the amount of by-products converted to natural gas equivalent.

[0065] Furthermore, the volume of natural gas commodities It is the sum of annual commodity production of natural gas; the equivalent of crude oil in natural gas is the sum of annual commodity production of crude oil multiplied by the ratio of crude oil to natural gas equivalent; the equivalent of by-products in natural gas is the sum of annual commodity production of by-products multiplied by the ratio of by-products to natural gas equivalent.

[0066] Furthermore, byproducts include condensate, sulfur, ethane, liquefied petroleum gas, stabilized light hydrocarbons, and helium.

[0067] Furthermore, the sensitivity factors in the sensitivity analysis in step four are derived from: product price, product output, product operating costs, and product construction investment.

[0068] Furthermore, the product prices include crude oil prices, natural gas prices, and condensate prices; where crude oil prices are measured in yuan / ton and US dollars / barrel, natural gas prices are measured in yuan / thousand cubic meters, and condensate prices are measured in yuan / ton; the product outputs include crude oil output, natural gas output, condensate output, sulfur output, ethane output, liquefied petroleum gas output, liquefied natural gas output, stabilized light hydrocarbon output, and helium output; where crude oil output, condensate output, sulfur output, ethane output, liquefied petroleum gas output, liquefied natural gas output, and stabilized light hydrocarbon output are all measured in ten thousand tons, natural gas output is measured in one hundred million cubic meters, and helium output is measured in ten thousand cubic meters; the product operating costs include operating costs, rental fees, safety production costs, other management costs, and operating expenses; the product construction investment includes construction period investment excluding VAT, construction period investment including VAT deductions, operating period investment excluding VAT, and operating period investment including VAT deductions.

[0069] Furthermore, the construction investment excluding VAT includes exploration investment excluding VAT, development well investment excluding VAT, and surface engineering investment excluding VAT; the construction period investment including VAT deduction includes exploration investment including VAT deduction, development well investment including VAT deduction, and surface engineering investment including VAT deduction; the operation period investment excluding VAT includes exploration investment excluding VAT, development well investment excluding VAT, and surface engineering investment excluding VAT; the operation period investment including VAT deduction includes exploration investment including VAT deduction, development well investment including VAT deduction, and surface engineering investment including VAT deduction.

[0070] Furthermore, changes in product price, product output, product operating costs, or product construction investment are selected as sensitivity factors for sensitivity analysis to obtain the final sensitivity analysis results.

[0071] Furthermore, the change in product output was selected as the sensitivity factor for the sensitivity analysis, and the final sensitivity analysis results were obtained based on the following matrix:

[0072]

[0073] In the matrix, F represents an abstract index calculation function, α represents the percentage change in output with a precision of 0.1, and the subscript t represents the annual value; GFb represents the sensitivity analysis module; Cap represents the full cost calculation module; This represents the product output in year t multiplied by the percentage change, under the sensitivity analysis module. This indicates that, under the sensitivity analysis module, the product price, product operating cost, and product construction investment remained unchanged in year t. A high-level matrix representing changes in production output. The elements stored in this high-level matrix include total costs and expenses, oil and gas production costs, administrative expenses, financial expenses, operating expenses, exploration expenses, business taxes and surcharges, total costs, crude oil commodity volume, crude oil equivalent to natural gas, natural gas commodity volume, by-products equivalent to natural gas, condensate, sulfur, ethane, liquefied petroleum gas, liquefied natural gas, stabilized light hydrocarbons, helium, and unit total costs.

[0074] Based on the above technical solution, the beneficial effects of the present invention are as follows:

[0075] 1. The method of this invention obtains parameters in the natural gas field development plan, calculates the total cost and unit total cost, and then conducts a sensitivity analysis on the unit total cost to obtain the results of the sensitivity analysis. This provides objective and regular conclusions for the natural gas field development plan, helps evaluate whether the plan has the economic benefits of investment, and can further characterize the enterprise decision-making process and its impact on the results in detail.

[0076] 2. The system in this invention employs a natural gas field development scheme parameter acquisition module, a total cost and business tax and surcharge calculation module, a full cost calculation module, and a sensitivity analysis module, thereby ultimately obtaining the sensitivity analysis results. This effectively assists in the economic evaluation of natural gas field development schemes, improves the effectiveness of investment, accelerates the process from planning to implementation of development schemes, and reduces business risks for enterprises.

[0077] 3. The method of the present invention uses product price, product output, product operating cost or product construction investment as variables for sensitivity analysis. Compared with the sensitivity analysis in the prior art, the variables used in the present invention are more reasonable, and the results obtained through sensitivity analysis are more accurate. Attached Figure Description

[0078] Figure 1 This is a system schematic diagram of the present invention.

[0079] Figure 2 This is a schematic diagram of the method flow of the present invention.

[0080] Figure 3 A partial interval analysis chart of unit full cost sensitivity.

[0081] Figure 4 Sensitivity analysis chart for unit full cost. Detailed Implementation

[0082] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0083] Example 1

[0084] like Figure 1 As shown, a system for calculating the unit total cost of a natural gas field development scheme includes:

[0085] The natural gas field development plan parameter acquisition module is used to acquire parameters in the natural gas field development plan;

[0086] The total cost and expenses and business taxes and surcharges calculation module is used to calculate the total cost and expenses and business taxes and surcharges in the natural gas field development plan based on the parameters obtained from the natural gas field development plan.

[0087] The full cost calculation module is used to calculate the full cost based on the total cost and expenses and business taxes and surcharges obtained from the total cost and expenses and business taxes and surcharges calculation module.

[0088] The sensitivity analysis module is used to calculate the unit full cost of the natural gas field development plan based on the full cost obtained from the full cost calculation module, and then perform sensitivity analysis on the unit full cost to obtain the final sensitivity analysis results.

[0089] The total cost and expenses calculation module includes oil and gas production costs, management expenses, financial expenses, operating expenses, and exploration expenses; the business taxes and surcharges calculation module includes urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue, and mining rights transfer revenue.

[0090] The specific solution for calculating the total cost and operating taxes and surcharges in a natural gas field development plan is as follows: The total cost is the sum of oil and gas production costs, management expenses, financial expenses, operating expenses, and exploration expenses; the taxes and surcharges are the sum of urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue, and mining rights transfer revenue.

[0091] Based on the parameters obtained from the natural gas field development plan, the specific process for calculating the total cost, expenses, business taxes, and surcharges in the natural gas field development plan is as follows:

[0092] In the formula, Indicates total cost; Indicates total cost and expenses;

[0093] This indicates business taxes and surcharges; Cap indicates the full cost calculation module.

[0094] The specific formula for calculating total cost is as follows:

[0095]

[0096] In the formula, Indicates the cost of oil and gas production; Indicates administrative expenses;

[0097] Indicates financial expenses; Indicates operating expenses; Indicates exploration costs;

[0098] The final formula for calculating the total cost is as follows:

[0099]

[0100] In the formula, This indicates business taxes and surcharges.

[0101] Calculate the unit total cost of a natural gas field development plan The specific method is as follows: divide the total cost by the sum of the natural gas commodity volume, the crude oil equivalent to natural gas, and the by-products equivalent to natural gas; calculate the unit total cost. The total cost of the natural gas field development plan here should be the total cost after deduction, specifically the total cost after deducting value-added tax.

[0102] Natural gas commodity volume The natural gas equivalent is the sum of the annual commodity production of natural gas; the crude oil equivalent to natural gas is the sum of the annual commodity production of crude oil multiplied by the crude oil equivalent to natural gas ratio; you can choose to multiply it by the crude oil conversion factor to obtain a more accurate crude oil equivalent to natural gas ratio; the byproducts equivalent to natural gas is the sum of the annual commodity production of byproducts multiplied by the byproducts equivalent to natural gas ratio; you can choose to multiply it by the byproducts conversion factor to obtain a more accurate byproducts equivalent to natural gas ratio.

[0103] Additional products include condensate, sulfur, ethane, liquefied petroleum gas, stabilized light hydrocarbons, and helium.

[0104] The sensitivity factors in the sensitivity analysis module are derived from: product price, product output, product operating costs, and product development investment.

[0105] Product prices include crude oil prices, natural gas prices, and condensate prices; crude oil prices are measured in yuan / ton and US dollars / barrel, natural gas prices in yuan / thousand cubic meters, and condensate prices in yuan / ton. Product output includes crude oil output, natural gas output, condensate output, sulfur output, ethane output, liquefied petroleum gas output, liquefied natural gas output, stabilized light hydrocarbon output, and helium output; crude oil output, condensate output, sulfur output, ethane output, liquefied petroleum gas output, liquefied natural gas output, and stabilized light hydrocarbon output are all measured in ten thousand tons, natural gas output is measured in one hundred million cubic meters, and helium output is measured in ten thousand cubic meters. Product operating costs include operating costs, rental fees, safety production costs, other management costs, and operating expenses. Product construction investment includes construction period investment excluding VAT, construction period investment including VAT deductions, operating period investment excluding VAT, and operating period investment including VAT deductions.

[0106] Construction investment excluding VAT includes exploration investment excluding VAT, development well investment excluding VAT, and surface engineering investment excluding VAT; construction period investment including VAT deduction includes exploration investment including VAT deduction, development well investment including VAT deduction, and surface engineering investment including VAT deduction; operation period investment excluding VAT includes exploration investment excluding VAT, development well investment excluding VAT, and surface engineering investment excluding VAT; operation period investment including VAT deduction includes exploration investment including VAT deduction, development well investment including VAT deduction, and surface engineering investment including VAT deduction.

[0107] Changes in product price, product output, product operating costs, or product construction investment are selected as sensitivity factors for sensitivity analysis to obtain the final sensitivity analysis results.

[0108] The change in product output was selected as the sensitivity factor for the sensitivity analysis. The final results of the sensitivity analysis were obtained based on the following matrix:

[0109]

[0110] In the matrix, F represents an abstract index calculation function, α represents the percentage change in output with a precision of 0.1, and the subscript t represents the annual value; GFb represents the sensitivity analysis module; Cap represents the full cost calculation module; This represents the product output in year t multiplied by the percentage change, under the sensitivity analysis module. This indicates that, under the sensitivity analysis module, the product price, product operating cost, and product construction investment remained unchanged in year t. A high-level matrix representing changes in production output. This high-level matrix stores elements including total costs, oil and gas production costs, administrative expenses, financial expenses, operating expenses, exploration expenses, business taxes and surcharges, total cost, crude oil commodity volume, crude oil equivalent to natural gas, natural gas commodity volume, by-products equivalent to natural gas, condensate, sulfur, ethane, liquefied petroleum gas, liquefied natural gas, stabilized light hydrocarbons, helium, and unit total cost. The changes in product output are relative to the high-level matrix. As to how this affects the project, those skilled in the art can specifically address this technical issue by referring to the technical economics section of the National Development and Reform Commission's 2010 Project Economic Evaluation Standard.

[0111] Example 2

[0112] like Figure 2 As shown, a method for calculating the unit total cost of a natural gas field development plan includes the following specific steps:

[0113] Step 1: Obtain the parameters for the natural gas field development plan, and divide the parameters into basic parameters and annual parameters;

[0114] Step 2: Based on the parameters obtained from the natural gas field development plan, calculate the total cost, expenses, business taxes, and surcharges of the natural gas field development plan;

[0115] Step 3: Obtain the full cost of the natural gas field development plan based on the total costs, expenses, business taxes and surcharges;

[0116] Step 4: Based on the total cost of the obtained natural gas field development plan, calculate the unit total cost of the natural gas field development plan, and then conduct a sensitivity analysis on the unit total cost to obtain the final results of the sensitivity analysis.

[0117] The parameters in Step 1 include the production and sales price of natural gas and its by-products, tax rates and subsidies, construction period investment and VAT deduction, operation period investment and VAT deduction, operating costs, borrowing costs and financial expenses, interest rates and interest expenses, and special petroleum revenue.

[0118] Step one includes basic parameters and year-specific parameters. The basic parameters are imported as scalar types, and the year-specific parameters are imported as vector types. The specific matrix construction is as follows:

[0119]

[0120] In the formula, t represents time in years; T represents the total time spent on the evaluation period in years; a is the specific value of the basic parameter; a t Let t be the specific value of the annual parameter in year t.

[0121] The basic parameters are values ​​that do not change with the year during the evaluation period; the year-specific parameters are values ​​that change with the year during the evaluation period.

[0122] The total cost in step two includes oil and gas production costs, management expenses, financial expenses, operating expenses, and exploration expenses; business taxes and surcharges include urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue, and mining rights transfer revenue.

[0123] The specific solution for the total cost and operating taxes and surcharges of the natural gas field development plan is as follows: The total cost is the sum of oil and gas production costs, management expenses, financial expenses, operating expenses and exploration expenses; the taxes and surcharges are the sum of urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue and mining rights transfer revenue.

[0124] Oil and gas production costs include operating costs, depreciation, and lease payments; administrative expenses include amortization of intangible assets, amortization of other assets, safety production costs, and other administrative expenses; financial expenses include amortization of intangible assets, amortization of other assets, safety production costs, and other administrative expenses; exploration costs include exploration investment costs during the construction period (including VAT) and exploration investment costs during the operation period (including VAT); operating expenses are operating revenue multiplied by the ratio of operating expenses to operating revenue.

[0125] Input the annual parameters from step one, as well as the total cost, expenses, taxes, and surcharges from step two, into the following auxiliary matrix B for calculation:

[0126]

[0127] In the matrix above, t represents time in years; T represents the total time spent during the evaluation period in years.

[0128] This indicates the specific amount invested each year; This indicates the annual investment, including the specific investment amount after depreciation; a t This represents the investment value in year t; a nt This represents the investment in year n, after depreciation in year t.

[0129] Store the calculation results obtained from the auxiliary matrix B, along with the basic parameters from step one, into the high-level matrix A:

[0130]

[0131] In the matrix above, the superscript indicators include oil and gas production costs, management expenses, financial expenses, operating expenses, exploration expenses, urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue, mining rights transfer revenue, output and sales price of natural gas and its by-products, tax rates and subsidies, construction period investment and VAT deduction, operation period investment and VAT deduction, operating costs, borrowing costs and financial expenses, and interest rates and interest expenses. The subscript modules refer to the modules to which the indicators belong, including modules for obtaining parameters for natural gas field development schemes, calculating total costs and operating taxes and surcharges, calculating full costs, and sensitivity analysis. 't' represents time, in years. This represents the specific value in year t under index 1 and module 3, and in In this column, all values ​​are stored as the specific values ​​in index 1 and module 3 for year t. This indicates the specific values ​​under indicator 2 and module 5, and in Under this column, all values ​​are stored as specific values ​​under Indicator 2 and Module 5; This indicates the specific values ​​under indicator 3 and module 7, and in Under this column, all values ​​are stored as specific values ​​under index 3 and module 7; the three values ​​shown in the matrix are not all values ​​contained in this advanced matrix A. This advanced matrix A should store all values ​​including those in the natural gas field development plan; in the above matrix, if the subscript has both module and t, the value is a yearly parameter, and if the subscript only has module, the value is a basic parameter.

[0132] In the matrix above, Indicators 1, 2, and 3 can be oil and gas production costs, management expenses, financial expenses, operating expenses, exploration expenses, urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue, mining rights transfer revenue, output and sales price of natural gas and its by-products, tax rates and subsidies, construction period investment and VAT deduction, operation period investment and VAT deduction, operating costs, borrowing costs and financial expenses or interest rates and interest expenses; Modules 3, 5, and 7 can be natural gas field development scheme parameter acquisition modules, total cost and operating tax and surcharge calculation modules, full cost calculation modules, or sensitivity analysis modules.

[0133] The specific formula for calculating the total cost in step three is as follows:

[0134]

[0135] In the formula, Indicates total cost; Indicates total cost and expenses;

[0136] This indicates business taxes and surcharges; Cap indicates the full cost calculation module.

[0137] The specific formula for calculating total cost is as follows:

[0138]

[0139] In the formula, Indicates the cost of oil and gas production; Indicates administrative expenses;

[0140] Indicates financial expenses; Indicates operating expenses; Indicates exploration costs;

[0141] The final formula for calculating the total cost is as follows:

[0142]

[0143] In the formula, This indicates business taxes and surcharges.

[0144] In step four, the unit total cost of the natural gas field development plan is calculated based on the obtained total cost of the natural gas field development plan. The specific solution is as follows: Divide the total cost by the sum of the natural gas commodity quantity, the crude oil equivalent to natural gas, and the by-products equivalent to natural gas; calculate the unit total cost. The total cost of the natural gas field development plan here should be the total cost after deductions, specifically the total cost after deducting value-added tax.

[0145] Natural gas commodity volume The natural gas equivalent is the sum of the annual commodity production of natural gas; the crude oil equivalent to natural gas is the sum of the annual commodity production of crude oil multiplied by the crude oil equivalent to natural gas ratio; you can choose to multiply it by the crude oil conversion factor to obtain a more accurate crude oil equivalent to natural gas ratio; the byproducts equivalent to natural gas is the sum of the annual commodity production of byproducts multiplied by the byproducts equivalent to natural gas ratio; you can choose to multiply it by the byproducts conversion factor to obtain a more accurate byproducts equivalent to natural gas ratio.

[0146] Additional products include condensate, sulfur, ethane, liquefied petroleum gas, stabilized light hydrocarbons, and helium.

[0147] The sensitivity factors in the sensitivity analysis in step four are derived from: product price, product output, product operating costs, and product development investment.

[0148] Product prices include crude oil prices, natural gas prices, and condensate prices; crude oil prices are measured in yuan / ton and US dollars / barrel, natural gas prices in yuan / thousand cubic meters, and condensate prices in yuan / ton. Product output includes crude oil output, natural gas output, condensate output, sulfur output, ethane output, liquefied petroleum gas output, liquefied natural gas output, stabilized light hydrocarbon output, and helium output; crude oil output, condensate output, sulfur output, ethane output, liquefied petroleum gas output, liquefied natural gas output, and stabilized light hydrocarbon output are all measured in ten thousand tons, natural gas output is measured in one hundred million cubic meters, and helium output is measured in ten thousand cubic meters. Product operating costs include operating costs, rental fees, safety production costs, other management costs, and operating expenses. Product construction investment includes construction period investment excluding VAT, construction period investment including VAT deductions, operating period investment excluding VAT, and operating period investment including VAT deductions.

[0149] Construction investment excluding VAT includes exploration investment excluding VAT, development well investment excluding VAT, and surface engineering investment excluding VAT; construction period investment including VAT deduction includes exploration investment including VAT deduction, development well investment including VAT deduction, and surface engineering investment including VAT deduction; operation period investment excluding VAT includes exploration investment excluding VAT, development well investment excluding VAT, and surface engineering investment excluding VAT; operation period investment including VAT deduction includes exploration investment including VAT deduction, development well investment including VAT deduction, and surface engineering investment including VAT deduction.

[0150] Changes in product price, product output, product operating costs, or product construction investment are selected as sensitivity factors for sensitivity analysis to obtain the final sensitivity analysis results.

[0151] The change in product output was selected as the sensitivity factor for the sensitivity analysis. The final results of the sensitivity analysis were obtained based on the following matrix:

[0152]

[0153] In the matrix, F represents an abstract index calculation function, α represents the percentage change in output with a precision of 0.1, and the subscript t represents the annual value; GFb represents the sensitivity analysis module; Cap represents the full cost calculation module; This represents the product output in year t multiplied by the percentage change, under the sensitivity analysis module. This indicates that, under the sensitivity analysis module, the product price, product operating cost, and product construction investment remained unchanged in year t. A high-level matrix representing changes in production output. This high-level matrix stores elements including total costs, oil and gas production costs, administrative expenses, financial expenses, operating expenses, exploration expenses, business taxes and surcharges, total cost, crude oil commodity volume, crude oil equivalent to natural gas, natural gas commodity volume, by-products equivalent to natural gas, condensate, sulfur, ethane, liquefied petroleum gas, liquefied natural gas, stabilized light hydrocarbons, helium, and unit total cost. The changes in product output are relative to the high-level matrix. As to how this affects the project, those skilled in the art can specifically address this technical issue by referring to the technical economics section of the National Development and Reform Commission's 2010 Project Economic Evaluation Standard.

[0154] In practical applications of the program, for ease of calculation, data can be stored in multiple modules. For example, in the natural gas field development scheme parameter acquisition module (Caj), the natural gas commodity quantity can be stored in the natural gas field development scheme parameter acquisition module and defined as an annual parameter. This is more convenient in practical applications of the program. The specific matrix representation is as follows:

[0155]

[0156] Example 3

[0157] like Figure 1 As shown, a system for calculating the unit total cost of a natural gas field development scheme includes:

[0158] The natural gas field development plan parameter acquisition module is used to acquire parameters in the natural gas field development plan;

[0159] The total cost and expenses and business taxes and surcharges calculation module is used to calculate the total cost and expenses and business taxes and surcharges in the natural gas field development plan based on the parameters obtained from the natural gas field development plan.

[0160] The full cost calculation module is used to calculate the full cost based on the total cost and expenses and business taxes and surcharges obtained from the total cost and expenses and business taxes and surcharges calculation module.

[0161] The sensitivity analysis module is used to calculate the unit full cost of the natural gas field development plan based on the full cost obtained from the full cost calculation module, and then perform sensitivity analysis on the unit full cost to obtain the final sensitivity analysis results.

[0162] The total cost and expenses calculation module includes oil and gas production costs, management expenses, financial expenses, operating expenses, and exploration expenses; the business taxes and surcharges calculation module includes urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue, and mining rights transfer revenue.

[0163] The specific solution for calculating the total cost and operating taxes and surcharges in a natural gas field development plan is as follows: The total cost is the sum of oil and gas production costs, management expenses, financial expenses, operating expenses, and exploration expenses; the taxes and surcharges are the sum of urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue, and mining rights transfer revenue.

[0164] Based on the parameters obtained from the natural gas field development plan, the specific process for calculating the total cost, expenses, business taxes, and surcharges in the natural gas field development plan is as follows:

[0165] In the formula, Indicates total cost; Indicates total cost and expenses;

[0166] This indicates business taxes and surcharges; Cap indicates the full cost calculation module.

[0167] The specific formula for calculating total cost is as follows:

[0168]

[0169] In the formula, Indicates the cost of oil and gas production; Indicates administrative expenses;

[0170] Indicates financial expenses; Indicates operating expenses; Indicates exploration costs;

[0171] The final formula for calculating the total cost is as follows:

[0172]

[0173] In the formula, This indicates business taxes and surcharges.

[0174] Calculate the unit total cost of a natural gas field development plan The specific method is as follows: Divide the total cost by the sum of the natural gas commodity quantity, the crude oil equivalent to natural gas, and the by-products equivalent to natural gas; calculate the unit total cost. The total cost of the natural gas field development plan here should be the total cost after deductions, specifically the total cost after deducting value-added tax.

[0175] Natural gas commodity volume The natural gas equivalent is the sum of the annual commodity production of natural gas; the crude oil equivalent to natural gas is the sum of the annual commodity production of crude oil multiplied by the crude oil equivalent to natural gas ratio; you can choose to multiply it by the crude oil conversion factor to obtain a more accurate crude oil equivalent to natural gas ratio; the byproducts equivalent to natural gas is the sum of the annual commodity production of byproducts multiplied by the byproducts equivalent to natural gas ratio; you can choose to multiply it by the byproducts conversion factor to obtain a more accurate byproducts equivalent to natural gas ratio.

[0176] Additional products include condensate, sulfur, ethane, liquefied petroleum gas, stabilized light hydrocarbons, and helium.

[0177] The sensitivity factors in the sensitivity analysis module are derived from: product price, product output, product operating costs, and product development investment.

[0178] Product prices include crude oil prices, natural gas prices, and condensate prices; crude oil prices are measured in yuan / ton and US dollars / barrel, natural gas prices in yuan / thousand cubic meters, and condensate prices in yuan / ton. Product output includes crude oil output, natural gas output, condensate output, sulfur output, ethane output, liquefied petroleum gas output, liquefied natural gas output, stabilized light hydrocarbon output, and helium output; crude oil output, condensate output, sulfur output, ethane output, liquefied petroleum gas output, liquefied natural gas output, and stabilized light hydrocarbon output are all measured in ten thousand tons, natural gas output is measured in one hundred million cubic meters, and helium output is measured in ten thousand cubic meters. Product operating costs include operating costs, rental fees, safety production costs, other management costs, and operating expenses. Product construction investment includes construction period investment excluding VAT, construction period investment including VAT deductions, operating period investment excluding VAT, and operating period investment including VAT deductions.

[0179] Construction investment excluding VAT includes exploration investment excluding VAT, development well investment excluding VAT, and surface engineering investment excluding VAT; construction period investment including VAT deduction includes exploration investment including VAT deduction, development well investment including VAT deduction, and surface engineering investment including VAT deduction; operation period investment excluding VAT includes exploration investment excluding VAT, development well investment excluding VAT, and surface engineering investment excluding VAT; operation period investment including VAT deduction includes exploration investment including VAT deduction, development well investment including VAT deduction, and surface engineering investment including VAT deduction.

[0180] Changes in product price, product output, product operating costs, or product construction investment are selected as sensitivity factors for sensitivity analysis to obtain the final sensitivity analysis results.

[0181] The change in product output was selected as the sensitivity factor for the sensitivity analysis. The final results of the sensitivity analysis were obtained based on the following matrix:

[0182]

[0183] In the matrix, F represents an abstract index calculation function, α represents the percentage change in output with a precision of 0.1, and the subscript t represents the annual value; GFb represents the sensitivity analysis module; Cap represents the full cost calculation module; This represents the product output in year t multiplied by the percentage change, under the sensitivity analysis module. This indicates that, under the sensitivity analysis module, the product price, product operating cost, and product construction investment remained unchanged in year t. A high-level matrix representing changes in production output. This high-level matrix stores elements including total costs, oil and gas production costs, administrative expenses, financial expenses, operating expenses, exploration expenses, business taxes and surcharges, total cost, crude oil commodity volume, crude oil equivalent to natural gas, natural gas commodity volume, by-products equivalent to natural gas, condensate, sulfur, ethane, liquefied petroleum gas, liquefied natural gas, stabilized light hydrocarbons, helium, and unit total cost. The changes in product output are relative to the high-level matrix. As to how this affects the project, those skilled in the art can specifically address this technical issue by referring to the technical economics section of the National Development and Reform Commission's 2010 Project Economic Evaluation Standard.

[0184] like Figure 2 As shown, a method for calculating the unit total cost of a natural gas field development plan includes the following specific steps:

[0185] Step 1: Obtain the parameters for the natural gas field development plan, and divide the parameters into basic parameters and annual parameters;

[0186] Step 2: Based on the parameters obtained from the natural gas field development plan, calculate the total cost, expenses, business taxes, and surcharges of the natural gas field development plan;

[0187] Step 3: Obtain the full cost of the natural gas field development plan based on the total costs, expenses, business taxes and surcharges;

[0188] Step 4: Based on the total cost of the obtained natural gas field development plan, calculate the unit total cost of the natural gas field development plan, and then conduct a sensitivity analysis on the unit total cost to obtain the final results of the sensitivity analysis.

[0189] The parameters in Step 1 include the production and sales price of natural gas and its by-products, tax rates and subsidies, construction period investment and VAT deduction, operation period investment and VAT deduction, operating costs, borrowing costs and financial expenses, interest rates and interest expenses, and special petroleum revenue.

[0190] Step one includes basic parameters and year-specific parameters. The basic parameters are imported as scalar types, and the year-specific parameters are imported as vector types. The specific matrix construction is as follows:

[0191]

[0192] In the formula, t represents time in years; T represents the total time spent on the evaluation period in years; a is the specific value of the basic parameter; a t Let t be the specific value of the annual parameter in year t.

[0193] The basic parameters are values ​​that do not change with the year during the evaluation period; the year-specific parameters are values ​​that change with the year during the evaluation period.

[0194] The total cost in step two includes oil and gas production costs, management expenses, financial expenses, operating expenses, and exploration expenses; business taxes and surcharges include urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue, and mining rights transfer revenue.

[0195] The specific solution for the total cost and operating taxes and surcharges of the natural gas field development plan is as follows: The total cost is the sum of oil and gas production costs, management expenses, financial expenses, operating expenses and exploration expenses; the taxes and surcharges are the sum of urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue and mining rights transfer revenue.

[0196] Oil and gas production costs include operating costs, depreciation, and lease payments; administrative expenses include amortization of intangible assets, amortization of other assets, safety production costs, and other administrative expenses; financial expenses include amortization of intangible assets, amortization of other assets, safety production costs, and other administrative expenses; exploration costs include exploration investment costs during the construction period (including VAT) and exploration investment costs during the operation period (including VAT); operating expenses are operating revenue multiplied by the ratio of operating expenses to operating revenue.

[0197] Input the annual parameters from step one, as well as the total cost, expenses, taxes, and surcharges from step two, into the following auxiliary matrix B for calculation:

[0198]

[0199] In the matrix above, t represents time in years; T represents the total time spent during the evaluation period in years.

[0200] This indicates the specific amount invested each year; This indicates the annual investment, including the specific investment amount after depreciation; a t This represents the investment value in year t; a nt This represents the investment in year n, after depreciation in year t.

[0201] Store the calculation results obtained from the auxiliary matrix B, along with the basic parameters from step one, into the high-level matrix A:

[0202]

[0203] In the matrix above, the superscript indicators include oil and gas production costs, management expenses, financial expenses, operating expenses, exploration expenses, urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue, mining rights transfer revenue, output and sales price of natural gas and its by-products, tax rates and subsidies, construction period investment and VAT deduction, operation period investment and VAT deduction, operating costs, borrowing costs and financial expenses, and interest rates and interest expenses. The subscript modules refer to the modules to which the indicators belong, including modules for obtaining parameters for natural gas field development schemes, calculating total costs and operating taxes and surcharges, calculating full costs, and sensitivity analysis. 't' represents time, in years. This represents the specific value in year t under index 1 and module 3, and in In this column, all values ​​are stored as the specific values ​​in index 1 and module 3 for year t. This indicates the specific values ​​under indicator 2 and module 5, and in Under this column, all values ​​are stored as specific values ​​under Indicator 2 and Module 5; This indicates the specific values ​​under indicator 3 and module 7, and in Under this column, all values ​​are stored as specific values ​​under index 3 and module 7; the three values ​​shown in the matrix are not all values ​​contained in this advanced matrix A. This advanced matrix A should store all values ​​including those in the natural gas field development plan; in the above matrix, if the subscript has both module and t, the value is a yearly parameter, and if the subscript only has module, the value is a basic parameter.

[0204] In the matrix above, Indicators 1, 2, and 3 can be oil and gas production costs, management expenses, financial expenses, operating expenses, exploration expenses, urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue, mining rights transfer revenue, output and sales price of natural gas and its by-products, tax rates and subsidies, construction period investment and VAT deduction, operation period investment and VAT deduction, operating costs, borrowing costs and financial expenses or interest rates and interest expenses; Modules 3, 5, and 7 can be natural gas field development scheme parameter acquisition modules, total cost and operating tax and surcharge calculation modules, full cost calculation modules, or sensitivity analysis modules.

[0205] The specific formula for calculating the total cost in step three is as follows:

[0206]

[0207] In the formula, Indicates total cost; Indicates total cost and expenses;

[0208] This indicates business taxes and surcharges; Cap indicates the full cost calculation module.

[0209] The specific formula for calculating total cost is as follows:

[0210]

[0211] In the formula, Indicates the cost of oil and gas production; Indicates administrative expenses;

[0212] Indicates financial expenses; Indicates operating expenses; Indicates exploration costs;

[0213] The final formula for calculating the total cost is as follows:

[0214]

[0215] In the formula, This indicates business taxes and surcharges.

[0216] In step four, the unit total cost of the natural gas field development plan is calculated based on the obtained total cost of the natural gas field development plan. The specific solution is as follows: divide the total cost by the sum of the natural gas commodity quantity, the crude oil equivalent to natural gas, and the by-products equivalent to natural gas; calculate the unit total cost. The total cost of the natural gas field development plan here should be the total cost after deduction, specifically the total cost after deducting value-added tax.

[0217] Natural gas commodity volume The natural gas equivalent is the sum of the annual commodity production of natural gas; the crude oil equivalent to natural gas is the sum of the annual commodity production of crude oil multiplied by the crude oil equivalent to natural gas ratio; you can choose to multiply it by the crude oil conversion factor to obtain a more accurate crude oil equivalent to natural gas ratio; the byproducts equivalent to natural gas is the sum of the annual commodity production of byproducts multiplied by the byproducts equivalent to natural gas ratio; you can choose to multiply it by the byproducts conversion factor to obtain a more accurate byproducts equivalent to natural gas ratio.

[0218] Additional products include condensate, sulfur, ethane, liquefied petroleum gas, stabilized light hydrocarbons, and helium.

[0219] The sensitivity factors in the sensitivity analysis in step four are derived from: product price, product output, product operating costs, and product development investment.

[0220] Product prices include crude oil prices, natural gas prices, and condensate prices; crude oil prices are measured in yuan / ton and US dollars / barrel, natural gas prices in yuan / thousand cubic meters, and condensate prices in yuan / ton. Product output includes crude oil output, natural gas output, condensate output, sulfur output, ethane output, liquefied petroleum gas output, liquefied natural gas output, stabilized light hydrocarbon output, and helium output; crude oil output, condensate output, sulfur output, ethane output, liquefied petroleum gas output, liquefied natural gas output, and stabilized light hydrocarbon output are all measured in ten thousand tons, natural gas output is measured in one hundred million cubic meters, and helium output is measured in ten thousand cubic meters. Product operating costs include operating costs, rental fees, safety production costs, other management costs, and operating expenses. Product construction investment includes construction period investment excluding VAT, construction period investment including VAT deductions, operating period investment excluding VAT, and operating period investment including VAT deductions.

[0221] Construction investment excluding VAT includes exploration investment excluding VAT, development well investment excluding VAT, and surface engineering investment excluding VAT; construction period investment including VAT deduction includes exploration investment including VAT deduction, development well investment including VAT deduction, and surface engineering investment including VAT deduction; operation period investment excluding VAT includes exploration investment excluding VAT, development well investment excluding VAT, and surface engineering investment excluding VAT; operation period investment including VAT deduction includes exploration investment including VAT deduction, development well investment including VAT deduction, and surface engineering investment including VAT deduction.

[0222] Changes in product price, product output, product operating costs, or product construction investment are selected as sensitivity factors for sensitivity analysis to obtain the final sensitivity analysis results.

[0223] The change in product output was selected as the sensitivity factor for sensitivity analysis. The final sensitivity analysis results were obtained based on the following matrix:

[0224]

[0225] In the matrix, F represents an abstract index calculation function, α represents the percentage change in output with a precision of 0.1, and the subscript t represents the annual value; GFb represents the sensitivity analysis module; Cap represents the full cost calculation module; This represents the product output in year t multiplied by the percentage change, under the sensitivity analysis module. This indicates that, under the sensitivity analysis module, the product price, product operating cost, and product construction investment remained unchanged in year t. A high-level matrix representing changes in production output. This high-level matrix stores elements including total costs, oil and gas production costs, administrative expenses, financial expenses, operating expenses, exploration expenses, business taxes and surcharges, total cost, crude oil commodity volume, crude oil equivalent to natural gas, natural gas commodity volume, by-products equivalent to natural gas, condensate, sulfur, ethane, liquefied petroleum gas, liquefied natural gas, stabilized light hydrocarbons, helium, and unit total cost. The changes in product output are relative to the high-level matrix. As to how this affects the project, those skilled in the art can specifically address this technical issue by referring to the technical economics section of the National Development and Reform Commission's 2010 Project Economic Evaluation Standard.

[0226] In practical applications of the program, for ease of calculation, data can be stored in multiple modules. For example, in the natural gas field development scheme parameter acquisition module (Caj), the natural gas commodity quantity can be stored in the natural gas field development scheme parameter acquisition module and defined as an annual parameter. This is more convenient in practical applications of the program. The specific matrix representation is as follows:

[0227]

[0228] Example 4

[0229] Based on Example 3, taking a gas field development plan as an example, the plan designs for 255 wells, of which 23 are existing wells and 232 are newly deployed wells. To meet the production needs of the block's gas wells, 64 well sites, 6 gas gathering stations, 1 natural gas processing plant, and corresponding pipelines and related supporting projects will be constructed. During the natural gas development process, by-products will be generated after the deep processing of natural gas. These by-products have certain market value. The additional products of this plan include:

[0230] Condensate, ethane, LPG, LNG, stabilized light hydrocarbons, helium.

[0231] The evaluation scope of this project is based on the natural gas field development plan, including a financial evaluation of the costs and benefits incurred in the internal capacity construction projects of the natural gas field, and on this basis, the unit total cost is calculated. The natural gas parameters are as follows: evaluation period of 25 years, construction period of 1 year, and operation period of 24 years; benchmark rate of return of 6%; utilization investment of RMB 870 million; development well engineering investment of RMB 789.778 million (excluding tax, VAT deduction of RMB 789.78 million); estimated investment in surface engineering of RMB 469.403 million (excluding tax, VAT of RMB 373.4 million); the proportion of self-raised funds for the new construction investment of this project is 60%, and the proportion of loans is 40%, with a loan interest rate of 4.14%, and the loan repayment adopts the equal principal repayment method; the calculated construction period interest is RMB 35.45 million. The project's working capital is estimated using the expanded indicator method, i.e., calculated at 20% of the normal year's operating costs. The total working capital is calculated to be RMB 177.77 million, of which 30% is self-raised as initial working capital, and the remaining 70% is financed through loans at an interest rate of 3.33%, with interest expensed. The total investment for the project is RMB 13,968.21 million (including RMB 1,163.18 million in VAT), of which: new construction investment is RMB 13,754.99 million (RMB 4,281.07 million for construction during the construction period and RMB 9,473.92 million for operation during the operation period), construction period interest is RMB 35.45 million, and working capital is RMB 177.77 million.

[0232] The total cost estimate includes oil and gas production costs (operating costs, depletion), management expenses, financial expenses, and operating expenses. Production and operating costs are estimated using the factor method and calculated based on the actual quantities in the plan. The unit operating cost of the plan is 377 yuan / thousand cubic meters. Depletion is calculated using the production method, including amortization, other management fees, and safety production fees. This plan has no amortization fees. Other management fees are calculated at 60 yuan / thousand cubic meters. Safety production fees are extracted at the end of the month based on the monthly oil and natural gas production, of which 7.5 yuan is charged per thousand cubic meters of natural gas and 20 yuan per ton of crude oil. This plan includes long-term loan interest, working capital loan interest, and disposal costs and financial expenses. Operating expenses are calculated at 0.5% of operating revenue.

[0233] The following matrix illustrates the auxiliary matrix for calculating depreciation using the production method. After summing the existing annual production figures, the annual depreciation rate is calculated using the production method. Since the annual production figures are a t-order matrix, summing them column-wise yields a t×1 matrix (vector). However, for amortization, the annual situation needs to be considered simultaneously, i.e., there may be new investments each year. These investments will be depreciated starting from that year according to the depreciation rate of that year, so it is still a t-order matrix.

[0234]

[0235] The data obtained from the auxiliary matrix is ​​stored in the advanced matrix A in Example 3. Other parameter matrices, index matrices, auxiliary matrices, etc. involved in the natural gas field development scheme are all consistent with the above algorithm idea.

[0236] During the evaluation period, the cumulative gas production was 25.8 billion cubic meters, the cumulative natural gas commodity volume was 25.3 billion cubic meters, the cumulative condensate commodity volume was 590,000 tons, the cumulative ethane commodity volume was 1.77 million tons, the cumulative LPG commodity volume was 920,000 tons, the cumulative LNG commodity volume was 2.16 million tons, the cumulative stable light hydrocarbon commodity volume was 450,000 tons, and the cumulative helium commodity volume was 8.72 million cubic meters. The average annual operating revenue during the evaluation period was 1,929.13 million yuan. The business taxes and surcharges involved in the project's financial evaluation include resource tax, urban maintenance and construction tax, education surcharge, and mining rights transfer revenue. The total taxes and surcharges during the evaluation period amounted to 2,180.97 million yuan, with an average annual tax and surcharge of 90.87 million yuan.

[0237] The total cost is calculated as: Total Cost + Business Taxes and Surcharges. The detailed indicators of total cost and expenses and taxes and surcharges have been budgeted using a high-order matrix. The total cost is calculated to be RMB 26,162.2 million, and the business taxes and surcharges are RMB 2,180.97 million. The sum of the two is the total cost, which is RMB 2,834.317 million.

[0238] The total cost after deductions was RMB 28,343,170,000. The equivalent natural gas volume of crude oil, natural gas commodities, and by-products were 0 cubic meters, 25.289 billion cubic meters, and 8.733 billion cubic meters, respectively. By-products included the production of condensate, sulfur, ethane, liquefied petroleum gas (LPG), liquefied natural gas (LNG), stabilized light hydrocarbons, helium, and other products, which, after conversion to natural gas equivalent in billions of cubic meters, were 675 million cubic meters, 0 cubic meters, 3.128 billion cubic meters, 1.238 billion cubic meters, 3.175 billion cubic meters, 518 million cubic meters, 0 cubic meters, and 0 cubic meters, respectively. The calculated unit total cost was RMB 833 per thousand cubic meters.

[0239] The sensitivity factors in the sensitivity analysis parameters are derived from: price (4 items), output (10 items), operating costs (22 items), and construction investment (16 items). The following uses output change as the sensitivity factor to briefly illustrate the situations when the change percentages are -20%, -15%, -10%, -5%, 0%, 5%, 10%, 15%, and 20%, respectively. That is, output decreases by 20%, 15%, 10%, 5%, remains consistent with the basic plan, increases by 5%, increases by 10%, increases by 15%, and increases by 20%. The high-order matrix data obtained using output change as an example is shown below:

[0240]

[0241] As shown in Table 1 below, the vector data of unit total cost is extracted, which constitutes the sensitivity analysis results of unit total cost when output decreases by 20%, 15%, 10%, 5%, remains consistent with the basic plan, increases by 5%, 10%, 15%, and 20%, respectively. The final analysis results are shown in the figure below. Figure 3 and Figure 4 As shown; correspondingly, this method can also incorporate the results of all sensitive factors into the analysis, and the analysis results can be included in a higher-order matrix one by one.

[0242] Table 1 presents the results of the unit full cost sensitivity analysis.

[0243] Table 1. Sensitivity Analysis of Unit Total Cost (Unit: Yuan / Thousand Cubic Meters)

[0244] Uncertainties --20％ -15％ --10％ -5％ Basic Plan 5％ 10％ 15％ 20％ Product Price 820 823 827 830 833 836 840 843 846 Yield 940 908 880 856 833 813 794 778 762 Operating costs 766 782 799 816 833 850 867 884 901 Construction Investment 753 773 793 813 833 853 873 893 913

[0245] Advanced Matrix The data stored in it is shown in Table 2 below.

[0246] Table 2 Unit Total Cost Table

[0247] Serial Number Project Name unit index Remark 1 Total cost Ten thousand yuan 2616220 1.1 Oil and gas production costs Ten thousand yuan 2334283 1.2 Management expenses Ten thousand yuan 172265 1.3 Financial expenses Ten thousand yuan 86522 1.4 Operating expenses Ten thousand yuan 23150 1.5 Exploration costs Ten thousand yuan 0 2 Business tax and surcharges Ten thousand yuan 218097 3 Total cost (1+2) Ten thousand yuan 2834317 4 Full cost after deduction Ten thousand yuan 2834317 Deducting value-added tax or additional product operating income 5 Crude oil commodity volume 10,000 tons 0 6 Crude oil equivalent to natural gas Yifang 0 7 Natural gas commodity volume Yifang 252.89 8 Additional products converted to natural gas equivalent Yifang 87.33 8.1 Condensate oil Yifang 6.75 8.2 sulfur Yifang 0 8.3 Ethane Yifang 31.28 8.4 Liquefied petroleum gas (LPG) Yifang 12.38 8.5 Liquefied natural gas (LNG) Yifang 31.75 8.6 Stabilized light hydrocarbons Yifang 5.18 8.7 helium Yifang 0 8.8 Other products Yifang 0 9 Unit total cost Yuan / 1000 cubic meters 833

[0248] The above description is a detailed description of the preferred embodiments of this application. However, the embodiments are not intended to limit the scope of the patent application of this application. All equivalent changes or modifications made under the technical spirit of this application should fall within the patent scope covered by this application.

Claims

1. A system for calculating the unit total cost of a natural gas field development plan, characterized in that, include: The natural gas field development plan parameter acquisition module is used to acquire parameters in the natural gas field development plan; The total cost and expenses and business taxes and surcharges calculation module is used to calculate the total cost and expenses and business taxes and surcharges in the natural gas field development plan based on the parameters obtained from the natural gas field development plan. The full cost calculation module is used to calculate the full cost based on the total cost and expenses and business taxes and surcharges obtained from the total cost and expenses and business taxes and surcharges calculation module. The sensitivity analysis module is used to calculate the unit full cost of the natural gas field development plan based on the full cost obtained from the full cost calculation module, and then perform sensitivity analysis on the unit full cost to obtain the final sensitivity analysis results.

2. The unit full cost calculation system for a natural gas field development scheme according to claim 1, characterized in that: The total cost and expenses calculation module includes oil and gas production costs, management expenses, financial expenses, operating expenses, and exploration expenses; the business taxes and surcharges calculation module includes urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue, and mining rights transfer revenue.

3. The unit full cost calculation system for a natural gas field development scheme according to claim 2, characterized in that: The specific solution for calculating the total cost and operating taxes and surcharges in a natural gas field development plan is as follows: The total cost is the sum of oil and gas production costs, management expenses, financial expenses, operating expenses, and exploration expenses; the taxes and surcharges are the sum of urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue, and mining rights transfer revenue.

4. The unit full cost calculation system for a natural gas field development scheme according to claim 1, characterized in that: Based on the parameters obtained from the natural gas field development plan, the specific process for calculating the total cost, expenses, business taxes, and surcharges in the natural gas field development plan is as follows: In the formula, Indicates total cost; Indicates total cost and expenses; This indicates business taxes and surcharges; Cap indicates the full cost calculation module. The specific formula for calculating total cost is as follows: In the formula, Indicates the cost of oil and gas production; Indicates administrative expenses; Indicates financial expenses; Indicates operating expenses; Indicates exploration costs; The final formula for calculating the total cost is as follows: In the formula, This indicates business taxes and surcharges.

5. The unit full cost calculation system for a natural gas field development scheme according to claim 1, characterized in that: Calculate the unit total cost of a natural gas field development plan The specific method is to divide the total cost by the sum of the volume of natural gas, the amount of crude oil converted to natural gas equivalent, and the amount of by-products converted to natural gas equivalent.

6. The unit full cost calculation system for a natural gas field development scheme according to claim 5, characterized in that: Natural gas commodity volume It is the sum of annual commodity production of natural gas; the crude oil to natural gas equivalent is the sum of annual commodity production of crude oil multiplied by the crude oil to natural gas equivalent ratio; the byproducts to natural gas equivalent is the sum of annual commodity production of byproducts multiplied by the byproducts to natural gas equivalent ratio; byproducts include condensate, sulfur, ethane, liquefied petroleum gas, stabilized light hydrocarbons and helium.

7. The unit full cost calculation system for a natural gas field development scheme according to claim 1, characterized in that: The sensitivity factors in the sensitivity analysis module are derived from: product price, product output, product operating cost, and product construction investment. The changes in product price, product output, product operating cost, or product construction investment are selected as the sensitivity factors for sensitivity analysis to conduct sensitivity analysis and obtain the final sensitivity analysis results.

8. The unit full cost calculation system for a natural gas field development scheme according to claim 7, characterized in that: The product prices include crude oil prices, natural gas prices, and condensate prices; The crude oil price is expressed in yuan / ton and US dollars / barrel, the natural gas price in yuan / thousand cubic meters, and the condensate price in yuan / ton. Product output includes crude oil output, natural gas output, condensate output, sulfur output, ethane output, liquefied petroleum gas output, liquefied natural gas output, stabilized light hydrocarbon output, and helium output. The units for crude oil output, condensate output, sulfur output, ethane output, liquefied petroleum gas output, liquefied natural gas output, and stabilized light hydrocarbon output are all ten thousand tons, the unit for natural gas output is one hundred million cubic meters, and the unit for helium output is ten thousand cubic meters. Product operating costs include operating costs, rental fees, safety production costs, other management fees, and operating expenses. Product construction investment includes construction period investment excluding VAT and construction investment including VAT deductions. The investment includes: construction investment during the construction period, investment during the operation period excluding VAT, and investment during the operation period including VAT deductions; the construction investment excluding VAT includes exploration investment excluding VAT, development well investment excluding VAT, and surface engineering investment excluding VAT; the construction investment including VAT deductions includes exploration investment including VAT deductions, development well investment including VAT deductions, and surface engineering investment including VAT deductions; the operation period investment excluding VAT includes exploration investment excluding VAT, development well investment excluding VAT, and surface engineering investment excluding VAT; the operation period investment including VAT deductions includes exploration investment including VAT deductions, development well investment including VAT deductions, and surface engineering investment including VAT deductions.

9. The unit full cost calculation system for a natural gas field development scheme according to claim 7, characterized in that: The change in product output was selected as the sensitivity factor for the sensitivity analysis. The final results of the sensitivity analysis were obtained based on the following matrix: In the matrix, F represents an abstract index calculation function, α represents the percentage change in output with a precision of 0.1, and the subscript t represents the annual value; GFb represents the sensitivity analysis module; Cap represents the full cost calculation module; This represents the product output in year t multiplied by the percentage change, under the sensitivity analysis module. This indicates that, under the sensitivity analysis module, the product price, product operating cost, and product construction investment remained unchanged in year t. A high-level matrix representing changes in production output. The elements stored in this high-level matrix include total costs and expenses, oil and gas production costs, administrative expenses, financial expenses, operating expenses, exploration expenses, business taxes and surcharges, total costs, crude oil commodity volume, crude oil equivalent to natural gas, natural gas commodity volume, by-products equivalent to natural gas, condensate, sulfur, ethane, liquefied petroleum gas, liquefied natural gas, stabilized light hydrocarbons, helium, and unit total costs.

10. A method for calculating the unit total cost of a natural gas field development scheme, characterized in that, The specific steps include the following: Step 1: Obtain the parameters for the natural gas field development plan, and divide the parameters into basic parameters and annual parameters; Step 2: Based on the parameters obtained from the natural gas field development plan, calculate the total cost, expenses, business taxes, and surcharges of the natural gas field development plan; Step 3: Obtain the full cost of the natural gas field development plan based on the total costs, expenses, business taxes and surcharges; Step 4: Based on the total cost of the obtained natural gas field development plan, calculate the unit total cost of the natural gas field development plan, and then conduct a sensitivity analysis on the unit total cost to obtain the final results of the sensitivity analysis.

11. The method for calculating the unit total cost of a natural gas field development scheme according to claim 10, characterized in that: The parameters in step one include the production and sales price of natural gas and its by-products, tax rates and subsidies, investment during the construction period and VAT deduction, investment during the operation period and VAT deduction, operating costs, borrowing costs and financial expenses, interest rates and interest expenses, and special petroleum revenue.

12. The method for calculating the unit total cost of a natural gas field development scheme according to claim 10, characterized in that: Step one includes basic parameters and year-specific parameters. The basic parameters are imported as scalar types, and the year-specific parameters are imported as vector types. The specific matrix construction is as follows: In the formula, t represents time in years; T represents the total time spent on the evaluation period in years; a is the specific value of the basic parameter; a t Let t be the specific value of the annual parameter in year t.

13. The method for calculating the unit total cost of a natural gas field development scheme according to claim 12, characterized in that: The basic parameters are values ​​that do not change with the year during the evaluation period; the year-specific parameters are values ​​that change with the year during the evaluation period.

14. The method for calculating the unit total cost of a natural gas field development scheme according to claim 10, characterized in that: The total cost in step two includes oil and gas production costs, management expenses, financial expenses, operating expenses, and exploration expenses; business taxes and surcharges include urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue, and mining rights transfer revenue.

15. The method for calculating the unit total cost of a natural gas field development scheme according to claim 14, characterized in that: The specific solution for the total cost and operating taxes and surcharges of the natural gas field development plan is as follows: The total cost is the sum of oil and gas production costs, management expenses, financial expenses, operating expenses and exploration expenses; the taxes and surcharges are the sum of urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue and mining rights transfer revenue.

16. The method for calculating the unit total cost of a natural gas field development scheme according to claim 15, characterized in that: Oil and gas production costs include operating costs, depreciation, and lease payments; administrative expenses include amortization of intangible assets, amortization of other assets, safety production costs, and other administrative expenses; financial expenses include amortization of intangible assets, amortization of other assets, safety production costs, and other administrative expenses; exploration costs include exploration investment costs during the construction period (including VAT) and exploration investment costs during the operation period (including VAT); operating expenses are operating revenue multiplied by the ratio of operating expenses to operating revenue.

17. The method for calculating the unit total cost of a natural gas field development scheme according to claim 10, characterized in that: Input the annual parameters from step one, as well as the total cost, expenses, taxes, and surcharges from step two, into the following auxiliary matrix B for calculation: In the matrix above, t represents time in years; T represents the total time spent during the evaluation period in years. This indicates the specific amount invested each year; This indicates the annual investment, including the specific investment amount after depreciation; a t This represents the investment value in year t; a nt This represents the investment in year n, after depreciation in year t. Store the calculation results obtained from the auxiliary matrix B, along with the basic parameters from step one, into the high-level matrix A: In the matrix above, the superscript indicators include oil and gas production costs, management expenses, financial expenses, operating expenses, exploration expenses, urban maintenance and construction tax, education surcharge, resource tax, special petroleum revenue, mining rights transfer revenue, output and sales price of natural gas and its by-products, tax rates and subsidies, construction period investment and VAT deduction, operation period investment and VAT deduction, operating costs, borrowing costs and financial expenses, and interest rates and interest expenses. The subscript modules refer to the modules to which the indicators belong, including modules for obtaining parameters for natural gas field development schemes, calculating total costs and operating taxes and surcharges, calculating full costs, and sensitivity analysis. 't' represents time, in years. This represents the specific value in year t under index 1 and module 3; This indicates the specific values ​​under indicator 2 and module 5; This indicates the specific values ​​under indicator 3 and module 7.

18. The method for calculating the unit total cost of a natural gas field development scheme according to claim 10, characterized in that: The specific formula for calculating the total cost in step three is as follows: In the formula, Indicates total cost; Indicates total cost and expenses; This indicates business taxes and surcharges; Cap indicates the full cost calculation module. The specific formula for calculating total cost is as follows: In the formula, Indicates the cost of oil and gas production; Indicates administrative expenses; Indicates financial expenses; Indicates operating expenses; Indicates exploration costs; The final formula for calculating the total cost is as follows: In the formula, This indicates business taxes and surcharges.

19. The method for calculating the unit total cost of a natural gas field development scheme according to claim 10, characterized in that: In step four, the unit total cost of the natural gas field development plan is calculated based on the obtained total cost of the natural gas field development plan. The specific solution is to divide the total cost by the sum of the quantity of natural gas, the amount of crude oil converted to natural gas equivalent, and the amount of by-products converted to natural gas equivalent.

20. The method for calculating the unit total cost of a natural gas field development scheme according to claim 19, characterized in that: Natural gas commodity volume It is the sum of annual commodity production of natural gas; the equivalent of crude oil in natural gas is the sum of annual commodity production of crude oil multiplied by the ratio of crude oil to natural gas equivalent; the equivalent of by-products in natural gas is the sum of annual commodity production of by-products multiplied by the ratio of by-products to natural gas equivalent.

21. The method for calculating the unit total cost of a natural gas field development scheme according to claim 20, characterized in that: Additional products include condensate, sulfur, ethane, liquefied petroleum gas, stabilized light hydrocarbons, and helium.

22. The method for calculating the unit total cost of a natural gas field development scheme according to claim 10, characterized in that: The sensitivity factors in the sensitivity analysis in step four are derived from: product price, product output, product operating costs, and product development investment.

23. The method for calculating the unit total cost of a natural gas field development scheme according to claim 22, characterized in that: The product prices include crude oil prices, natural gas prices, and condensate prices; The crude oil price is expressed in yuan / ton and US dollar / barrel, the natural gas price in yuan / thousand cubic meters, and the condensate price in yuan / ton. Product output includes crude oil output, natural gas output, condensate output, sulfur output, ethane output, liquefied petroleum gas output, liquefied natural gas output, stabilized light hydrocarbon output, and helium output. The units for crude oil output, condensate output, sulfur output, ethane output, liquefied petroleum gas output, liquefied natural gas output, and stabilized light hydrocarbon output are all ten thousand tons, the unit for natural gas output is one hundred million cubic meters, and the unit for helium output is ten thousand cubic meters. Product operating costs include operating costs, rental fees, safety production costs, other management costs, and operating expenses. Product construction investment includes construction period investment excluding VAT, construction period investment including VAT deductions, operating period investment excluding VAT, and operating period investment including VAT deductions.

24. The method for calculating the unit total cost of a natural gas field development scheme according to claim 23, characterized in that: The construction investment excluding VAT includes exploration investment excluding VAT, development well investment excluding VAT, and surface engineering investment excluding VAT; the construction period investment including VAT deduction includes exploration investment including VAT deduction, development well investment including VAT deduction, and surface engineering investment including VAT deduction; the operation period investment excluding VAT includes exploration investment excluding VAT, development well investment excluding VAT, and surface engineering investment excluding VAT; the operation period investment including VAT deduction includes exploration investment including VAT deduction, development well investment including VAT deduction, and surface engineering investment including VAT deduction.

25. The method for calculating the unit total cost of a natural gas field development scheme according to claim 22, characterized in that: Changes in product price, product output, product operating costs, or product construction investment are selected as sensitivity factors for sensitivity analysis to obtain the final sensitivity analysis results.

26. The method for calculating the unit total cost of a natural gas field development scheme according to claim 25, characterized in that: The change in product output was selected as the sensitivity factor for the sensitivity analysis. The final results of the sensitivity analysis were obtained based on the following matrix: In the matrix, F represents an abstract index calculation function, α represents the percentage change in output with a precision of 0.1, and the subscript t represents the annual value; GFb represents the sensitivity analysis module; Cap represents the full cost calculation module; This represents the product output in year t multiplied by the percentage change, under the sensitivity analysis module. This indicates that, under the sensitivity analysis module, the product price, product operating cost, and product construction investment remained unchanged in year t. A high-level matrix representing changes in production output. The elements stored in this high-level matrix include total costs and expenses, oil and gas production costs, administrative expenses, financial expenses, operating expenses, exploration expenses, business taxes and surcharges, total costs, crude oil commodity volume, crude oil equivalent to natural gas, natural gas commodity volume, by-products equivalent to natural gas, condensate, sulfur, ethane, liquefied petroleum gas, liquefied natural gas, stabilized light hydrocarbons, helium, and unit total costs.

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