A method for calculating the amount of carbon dioxide produced by an oil well

Abstract

The present application relates to carbon dioxide injection oil recovery technical field, specifically, it is a kind of oil well output carbon dioxide quantity calculation method, comprising: based on casing radius, tubing radius and oil casing annulus inner gas column height, the oil casing annulus volume of carbon dioxide injection oil recovery test area oil well is calculated;Based on the first wellhead temperature, the first annulus pressure, the second wellhead temperature and the second annulus pressure, the first compression factor and the second compression factor corresponding to the first gas component are calculated;Based on the second change and test duration, the instantaneous gas production of carbon dioxide gas in the test process of carbon dioxide injection oil recovery oil well is calculated;The present application provides a kind of oil well output carbon dioxide quantity calculation method, it is applicable to the oil reservoir of carbon dioxide flooding and carbon dioxide huff and puff and other carbon dioxide injection oil recovery technology, carbon dioxide injection oil recovery test area oil well output gas quantity fast calculation can be realized, further to provide data support for the evaluation of oil well carbon dioxide gas channeling, calculate carbon dioxide storage capacity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carbon dioxide injection oil production, in particular to a method for calculating the amount of carbon dioxide produced by an oil well. BACKGROUND

[0002] Carbon Dioxide Capture, Utilization and Storage (CCUS) refers to the process of separating carbon dioxide from industrial processes, energy utilization or the atmosphere, directly utilizing it or injecting it into the formation to achieve permanent carbon dioxide emission reduction. In the oil industry, the main direction is CCUS-EOR (Enhanced Oil Recovery), that is, the captured carbon dioxide is used for oil displacement, and the oil reservoir is used as a carbon storage body to realize the industrial process of maximizing carbon oil displacement and carbon storage collaborative development. Carbon dioxide flooding and carbon dioxide huff and puff are currently one of the important CCUS-EOR enhanced oil recovery technologies, which have the advantages of good effect, fast effect, economic and environmental protection, wide applicability, etc. At present, there are more than one hundred CCUS-EOR projects in the world. In the implementation process of CCUS-EOR project, how to realize efficient metering of oil well produced gas is of great significance for guiding the evaluation of oil well carbon dioxide channeling and assisting the calculation of carbon dioxide storage capacity. SUMMARY

[0003] The purpose of the present application is to provide a method for calculating the amount of carbon dioxide produced by an oil well, a device, equipment and medium to improve the above technical problems.

[0004] In order to achieve the above purpose, the embodiments of the present application provide the following technical solutions:

[0005] The embodiment of the present application provides a kind of oil well output carbon dioxide quantity calculation method, the method comprises: obtaining the casing radius of carbon dioxide injection oil production test area oil well, tubing radius and gas column height in oil casing annulus, and carbon dioxide injection oil production test area oil well is calculated based on the casing radius, tubing radius and gas column height in oil casing annulus and obtains the volume of oil casing annulus;First wellhead temperature, first annulus pressure, second wellhead temperature, second annulus pressure and first gas component generated in the test process of carbon dioxide injection oil production well are obtained, and the first gas component corresponding first compression factor and second compression factor are calculated based on the first wellhead temperature, first annulus pressure, second wellhead temperature and second annulus pressure, the first wellhead temperature and first annulus pressure are the wellhead temperature and annulus pressure of carbon dioxide injection oil production well at the beginning of test, the second wellhead temperature and second annulus pressure are the wellhead temperature and annulus pressure at the end of test, the first compression factor and second compression factor correspond to the compression factor of first output gas under two working conditions of beginning test and end test respectively;Based on the volume of oil casing annulus, first compression factor and second compression factor, the first change corresponding to the molar number of carbon dioxide gas in oil casing annulus during test is calculated, and the second change corresponding to the volume of carbon dioxide gas is calculated based on the first change;Based on the second change and test duration, the instantaneous gas production of carbon dioxide gas in carbon dioxide injection oil production well during test is calculated.

[0006] Optionally, the volume of oil casing annulus of carbon dioxide injection oil production test area oil well is calculated based on the casing radius, tubing radius and gas column height in oil casing annulus, comprising:

[0007] The casing radius, tubing radius and gas column height in oil casing annulus are retrieved, and the volume of oil casing annulus is calculated based on the first mathematical model, wherein the first mathematical model is:

[0008]

[0009] In the formula, r c is casing radius, r t is tubing radius, h is gas column height in oil casing annulus, V an is the volume of oil casing annulus.

[0010] Optionally, the first change corresponding to the molar number of carbon dioxide gas in oil casing annulus during test is calculated based on the volume of oil casing annulus, first compression factor and second compression factor, comprising:

[0011] The first change is calculated based on the volume of oil casing annulus, first compression factor and second compression factor through the second mathematical model, wherein the second mathematical model is:

[0012]

[0013] wherein P1 is a first annulus pressure, P2 is a second annulus pressure, R is a universal gas constant of the produced gas, which is 8.314 J / (mol·K), T1 is a first wellhead temperature, T2 is a second wellhead temperature, V is an annulus volume, Z1 is a first compressibility factor, Z2 is a second compressibility factor, φ1 is a molar fraction of carbon dioxide in the produced gas at the beginning of the test, φ2 is a molar fraction of carbon dioxide in the produced gas at the end of the test, n an is a number of moles of carbon dioxide gas in the annulus at the beginning of the test, n 1CO2 is a number of moles of carbon dioxide gas in the annulus at the beginning of the test, n 2CO2 is a number of moles of carbon dioxide gas in the annulus at the end of the test, Δn CO2 is a first change corresponding to the number of moles of carbon dioxide gas in the annulus during the test.

[0014] Optionally, a second change corresponding to the volume of carbon dioxide gas is calculated based on the first change, including:

[0015] The second change is calculated based on the change by a third mathematical model, wherein the third mathematical model is:

[0016] ΔV CO2 = 22.4 x 10 -3 × Δn CO2 ;

[0017] wherein Δn CO2 is the first change corresponding to the number of moles of carbon dioxide gas in the annulus during the test, and ΔV CO2 is the second change corresponding to the volume of carbon dioxide gas during the test.

[0018] Optionally, an instantaneous gas production rate of carbon dioxide gas of the carbon dioxide injection oil well during the test is calculated based on the second change and a test duration, including:

[0019] The instantaneous gas production rate is calculated based on the second change and the test duration by a fourth mathematical model, wherein the fourth mathematical model is:

[0020]

[0021] wherein ΔV CO2 is the second change corresponding to the volume of carbon dioxide gas during the test, and Δt is the test duration.

[0022] In a second aspect, an embodiment of the present application provides a device for calculating a carbon dioxide production amount of an oil well, the device comprising a memory and a processor.

[0023] The memory is used for storing a computer program; and the processor is used for implementing the steps of the oil well carbon dioxide output calculation method when the computer program is executed.

[0024] In a third aspect, the embodiments of the present application provide a medium, and the medium stores a computer program, and the computer program is executed by a processor to implement the steps of the oil well carbon dioxide output calculation method.

[0025] The present application has the following beneficial effects:

[0026] The present application provides an oil well carbon dioxide output calculation method, which aims at the problems that the existing technology adopts instrument equipment to measure the oil well output gas amount, and the process flow is complex and the cost is high, and the problems that the basic data required for calculating the output amount by using a tubing gas mathematical model is difficult to obtain, and the calculation process is complex, and establishes an oil well gas output calculation method based on eight field easily obtained parameters of a carbon dioxide injection oil recovery test area, including a casing diameter, a tubing diameter, an annular gas column height, a wellhead temperature (test start), a wellhead temperature (test end), a wellhead pressure (test start), a wellhead pressure (test end), and a test time, so as to realize low-cost, rapid and efficient measurement of the oil well gas output of the carbon dioxide injection oil recovery, and has important significance for guiding the evaluation of the carbon dioxide gas channeling of the oil well and assisting in calculating the carbon dioxide storage amount.

[0027] Other features and advantages of the present application will be described in the following description, and some will become apparent from the description, or will be understood through implementation of the embodiments of the present application. The purposes and other advantages of the present application can be achieved and obtained through the structures specifically pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0029] Figure 1 is a flowchart of an oil well carbon dioxide output calculation method described in the embodiments of the present application;

[0030] Figure 2 is a structural diagram of an oil well carbon dioxide output calculation device described in the embodiments of the present application. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals or letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Example 1

[0034] like Figure 1 As shown in the figure, this embodiment provides a method for calculating the amount of carbon dioxide produced by an oil well, the method including steps S100, S200, S300 and S400.

[0035] Step S100: Obtain the casing radius, tubing radius, and gas column height in the annulus of the oil well in the carbon dioxide injection oil production test area, and calculate the annulus volume of the oil well in the carbon dioxide injection oil production test area based on the casing radius, tubing radius, and gas column height in the annulus.

[0036] Step S200: Obtain the first wellhead temperature, first annular pressure, second wellhead temperature, second annular pressure, and first gas component generated by the carbon dioxide injection oil well during the test. Calculate the first compressibility factor and second compressibility factor corresponding to the first gas component based on the first wellhead temperature, first annular pressure, second wellhead temperature, and second annular pressure. The first wellhead temperature and first annular pressure are the wellhead temperature and annular pressure of the carbon dioxide injection oil well at the start of the test, and the second wellhead temperature and second annular pressure are the wellhead temperature and annular pressure at the end of the test. The first compressibility factor and second compressibility factor correspond to the compressibility factor of the first produced gas under the two working conditions of the start and end of the test, respectively.

[0037] Step S300, based on the casing annulus volume, the first compression factor and the second compression factor, a first change corresponding to the number of moles of carbon dioxide gas in the casing annulus during the test is calculated, and a second change corresponding to the volume of carbon dioxide gas is calculated based on the first change;

[0038] Step S400, based on the second change and the test duration, an instantaneous gas production rate of carbon dioxide gas of the carbon dioxide injection oil production well during the test is calculated.

[0039] Secondly, in step S100, based on the casing radius, the tubing radius and the gas column height in the casing annulus, the casing annulus volume of the carbon dioxide injection oil production test area well is calculated, including:

[0040] Step S110, the casing radius, the tubing radius and the gas column height in the casing annulus are retrieved, and the casing annulus volume is calculated based on a first mathematical model, wherein the first mathematical model is:

[0041]

[0042] In the formula, r c is the casing radius, r t is the tubing radius, h is the gas column height in the casing annulus, and V an is the casing annulus volume.

[0043] Secondly, in step S300 of the embodiment, based on the casing annulus volume, the first compression factor and the second compression factor, a first change corresponding to the number of moles of carbon dioxide gas in the casing annulus during the test is calculated, including:

[0044] Step S310, based on the casing annulus volume, the first compression factor and the second compression factor, the first change is calculated through a second mathematical model, wherein the second mathematical model is:

[0045]

[0046] In the formula, P1 is the first annulus pressure, P2 is the second annulus pressure, R is the universal gas constant of the produced gas, the value is 8.314 J / (mol·K), T1 is the first wellhead temperature, T2 is the second wellhead temperature, V an is the casing annulus volume, Z1 is the first compression factor, Z2 is the second compression factor, φ1 is the mole fraction of carbon dioxide in the produced gas at the beginning of the test, φ2 is the mole fraction of carbon dioxide in the produced gas at the end of the test, n 1CO2 is the number of moles of carbon dioxide gas in the casing annulus at the beginning of the test, n 2CO2 is the number of moles of carbon dioxide gas in the casing annulus at the end of the test, and Δn CO2A first change amount corresponding to the number of moles of carbon dioxide gas in the oil-casing annulus during the test.

[0047] Secondly, in the step S300, a second change amount corresponding to the volume of carbon dioxide gas is calculated based on the first change amount, including:

[0048] In the step S320, the second change amount is calculated based on the change amount by a third mathematical model, wherein the third mathematical model is:

[0049] ΔV CO2 = 22.4 x 10 -3 × Δn CO2 ;

[0050] In the formula, Δn CO2 is the first change amount corresponding to the number of moles of carbon dioxide gas in the oil-casing annulus during the test, and ΔV CO2 is the second change amount of the volume of carbon dioxide gas during the test.

[0051] Secondly, in the step S400, an instantaneous gas production rate of carbon dioxide gas of the carbon dioxide injection oil production well during the test is calculated based on the second change amount and a test duration, including:

[0052] In the step S410, the instantaneous gas production rate is calculated based on the second change amount and the test duration by a fourth mathematical model, wherein the fourth mathematical model is:

[0053]

[0054] In the formula, ΔV CO2 is the second change amount of the volume of carbon dioxide gas during the test, and Δt is the test duration.

[0055] In the embodiment, a calculation method of carbon dioxide production of an oil well is provided. The method is used to solve the problems of complex field implementation process and high cost of instrument equipment for measuring the gas production of the oil well in the implementation process of the carbon dioxide injection oil production project. The method is used to solve the problems of large difficulty in obtaining basic data required for calculating the yield by using a tubing gas mathematical model and complex calculation process. An oil well gas production calculation method based on eight field easily obtained parameters of casing diameter, tubing diameter, annular gas column height, wellhead temperature (test start), wellhead temperature (test end), wellhead pressure (test start), wellhead pressure (test end), and test time of the carbon dioxide injection oil production test area of the oil well is established. The low-cost, rapid, and efficient measurement of the carbon dioxide injection oil production well gas production is realized. The method has important significance for guiding the evaluation of carbon dioxide gas channeling of the oil well and assisting the calculation of the carbon dioxide storage amount.

[0056] In summary, the overall implementation scheme of the embodiment is:

[0057] (1) Obtain the casing diameter, tubing diameter, annulus gas column height, wellhead temperature (test start, wellhead temperature (test end), wellhead pressure (test start), wellhead pressure (test end), carbon dioxide mole fraction in produced gas (test start), carbon dioxide mole fraction in produced gas (test end), test time, and other related data parameters of the carbon dioxide injection oil recovery test area well.

[0058] (2) According to the casing radius r c , tubing radius r t , and annulus gas column height h three parameters, calculate the volume V an of the tubing-annulus of the carbon dioxide injection oil recovery test area well, and the calculation formula is as follows:

[0059]

[0060] (3) Measure the temperature, pressure and component changes of the produced gas in the tubing-annulus of the carbon dioxide injection oil recovery test area well during production, record the wellhead temperature T1 and annulus pressure P1 at the beginning of the test, and the wellhead temperature T2 and annulus pressure P2 at the end of the test, and detect the gas composition of the produced gas at the beginning and end by chromatograph, and the carbon dioxide mole fraction in the produced gas at the beginning and end of the test is recorded as φ1 and φ2 respectively.

[0061] (4) According to the temperature and pressure (T1, P1) at the beginning of the test, the temperature and pressure (T2, P2) at the end of the test, and the gas composition of the produced gas, the corresponding produced gas compression factors Z1 and Z2 under the two working conditions of the beginning and end of the test are calculated according to ISO 12213:2006 “Natural gas–Calculation of compression factor”.

[0062] (5) The gas produced in the production process of the carbon dioxide injection oil recovery test area well is regarded as a real gas, and the related parameters of the produced gas can be calculated by using the state equation of the real gas. The state equation of the real gas is as follows:

[0063] PV = nZRT (2)

[0064] In the formula, P is the pressure of the produced gas, V is the volume of the produced gas, n is the number of moles of the produced gas, Z is the compression factor of the produced gas, R is the universal gas constant of the produced gas, whose value is 8.314 J / (mol·K), and T is the absolute temperature of the produced gas.

[0065] Ignoring the influence of the temperature and pressure changes of the oil well in the carbon dioxide injection oil recovery test area on the deformation of the oil pipe and the casing and the liquid level in the oil-casing annulus, i.e. not considering the change of the volume of the oil-casing annulus, the change of the number of moles of carbon dioxide gas in the oil-casing annulus at the beginning of the test and at the end of the test can be obtained, and the calculation formula is as follows:

[0066]

[0067] In the formula, n 1CO2 is the number of moles of carbon dioxide gas in the oil-casing annulus at the beginning of the test, n 2CO2 is the number of moles of carbon dioxide gas in the oil-casing annulus at the end of the test, and Δn CO2 is the change of the number of moles of carbon dioxide gas in the oil-casing annulus at the beginning of the test and at the end of the test.

[0068] (6) The volume of one mole of carbon dioxide gas under standard conditions (20℃, 0.101MPa) is 22.4L. Therefore, the change of the volume of carbon dioxide gas ΔV CO2 can be calculated according to the change of the number of moles of carbon dioxide gas in the oil-casing annulus at the beginning of the test and at the end of the test, and the calculation formula is as follows:

[0069] ΔV CO2 = 22.4 × 10 -3 × Δn CO2 (4)

[0070] (7) According to the time difference Δt at the beginning of the test and at the end of the test and the change of the volume of carbon dioxide gas ΔV CO2 , the instantaneous gas production rate Q CO2 of the carbon dioxide gas of the oil well in the carbon dioxide injection oil recovery test area during the test can be calculated.

[0071]

[0072] Example 2

[0073] In order to more clearly illustrate the calculation method of the amount of carbon dioxide produced by an oil well provided by the present application, the specific implementation steps of the present application are described by way of example:

[0074] (1) The casing diameter, the oil pipe diameter, the annular gas column height, the wellhead temperature (at the beginning of the test), the wellhead temperature (at the end of the test), the wellhead pressure (at the beginning of the test), the wellhead pressure (at the end of the test), the carbon dioxide mole fraction in the produced gas (at the beginning of the test), the carbon dioxide mole fraction in the produced gas (at the end of the test), the test time and other related parameter data of an oil well in which carbon dioxide injection oil recovery is implemented are obtained, as shown in Table 1.

[0075] Table 1 Related parameter data table of the carbon dioxide injection oil recovery oil well

[0076]

[0077] (2) Refer to formula (1), according to the carbon dioxide injection oil well casing radius r c , tubing radius r t , gas column height h in the tubing-casing annulus three parameters calculation carbon dioxide injection oil well tubing-casing annulus volume V an , the calculation process as follows:

[0078]

[0079] (3) According to the carbon dioxide injection oil well test when the temperature, pressure (323.15K, 5MPa) and end test temperature, pressure (323.15K, 5.5MPa) conditions and the composition of the gas produced analysis results, calculation start test and end test two working conditions corresponding to the gas compression factor Z1 and Z2 are 0.98032 and 0.98174 respectively.

[0080] (4) Refer to formula (3), ignoring the carbon dioxide injection oil well temperature, pressure changes on the tubing and casing deformation and the effect of the liquid level in the tubing-casing annulus, namely not considering the change of the tubing-casing annulus volume, calculation start test and end test when the tubing-casing annulus carbon dioxide gas molar change, the calculation process as follows:

[0081]

[0082] (4) Refer to formula (4), according to the start test and end test when the tubing-casing annulus carbon dioxide gas molar change calculation carbon dioxide gas volume change ΔV CO2 , the calculation process as follows:

[0083] ΔV CO2 = 1.287 x 10 3 mol x 22.4 x 10 -3 m 3 / mol = 28.8288 (m 3 )

[0084] (5) Refer to formula (5), according to the start test and end test when the time difference Δt and carbon dioxide gas volume change ΔV CO2 calculation of carbon dioxide injection oil well carbon dioxide gas instantaneous gas production Q CO2 , the calculation process as follows:

[0085]

[0086] Example 3

[0087] Corresponding to the above method embodiments, the embodiments of the present disclosure also provide an oil well carbon dioxide output amount calculation device. The oil well carbon dioxide output amount calculation device described below can be correspondingly referred to the oil well carbon dioxide output amount calculation method described above.

[0088] Figure 2 is a block diagram of an oil well carbon dioxide output amount calculation device 800 according to an exemplary embodiment. As shown, the electronic device 800 can include a processor 801, a memory 802. The electronic device 800 can also include one or more of a multimedia component 803, an I / O interface 804, and a communication component 805. Figure 2

[0089] ​The processor 801 is configured to control overall operations of the electronic device 800 to complete all or part of the steps of the above-described method for calculating the amount of carbon dioxide produced by an oil well. The memory 802 is configured to store various types of data to support the operations of the electronic device 800, which can include, for example, instructions for any application or method operating on the electronic device 800, and application-related data, such as contact data, sent and received messages, pictures, audio, video, and the like. The memory 802 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk. The multimedia component 803 can include a screen and an audio component. The screen can be, for example, a touch screen, and the audio component is configured to output and / or input audio signals. For example, the audio component can include a microphone configured to receive external audio signals. The received audio signals can be further stored in the memory 802 or transmitted through the communication component 805. The audio component also includes at least one speaker configured to output audio signals. The I / O interface 804 provides an interface between the processor 801 and other interface modules, which can be a keyboard, a mouse, a button, and the like. The buttons can be virtual buttons or physical buttons. The communication component 805 is configured to perform wired or wireless communication between the electronic device 800 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, near field communication (NFC), 2G, 3G or 4G, or a combination of one or more of them, so the corresponding communication component 805 can include a Wi-Fi module, a Bluetooth module, an NFC module.

[0090] In an example embodiment, the electronic device 800 can be implemented by one or more Application Specific Integrated Circuit (ASIC), Digital Signal Processor (DSP), Digital Signal Processing Device (DSPD), Programmable Logic Device (PLD), Field Programmable Gate Array (FPGA), controller, microcontroller, microprocessor or other electronic elements for executing the above-mentioned oil well carbon dioxide output calculation method.

[0091] In another example embodiment, a computer readable storage medium including program instructions is also provided, which when executed by a processor, implements the steps of the above-mentioned oil well carbon dioxide output calculation method. For example, the computer readable storage medium can be the above-mentioned memory 802 including program instructions, which can be executed by the processor 801 of the electronic device 800 to complete the above-mentioned oil well carbon dioxide output calculation method.

[0092] Embodiment 4

[0093] Corresponding to the above method embodiments, the embodiments of the present disclosure also provide a readable storage medium, which can be referred to in conjunction with the above-mentioned oil well carbon dioxide output calculation method.

[0094] A readable storage medium, on which a computer program is stored, when executed by a processor, implements the steps of the above-mentioned oil well carbon dioxide output calculation method of the method embodiments.

[0095] The readable storage medium can be specifically a U disk, a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and various readable storage media that can store program codes.

[0096] The above only describes the preferred embodiments of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A method of calculating the amount of carbon dioxide produced from an oil well, characterized by, The method comprises: obtaining the casing radius, the tubing radius and the gas column height in the tubing-casing annulus of the carbon dioxide injection oil production test area well, and calculating the tubing-casing annulus volume of the carbon dioxide injection oil production test area well based on the casing radius, the tubing radius and the gas column height in the tubing-casing annulus; obtaining the first wellhead temperature, the first annulus pressure, the second wellhead temperature, the second annulus pressure and the first gas component generated by the carbon dioxide injection oil production well during the test, and calculating the first compression factor and the second compression factor corresponding to the first gas component based on the first wellhead temperature, the first annulus pressure, the second wellhead temperature and the second annulus pressure, wherein the first wellhead temperature and the first annulus pressure are the wellhead temperature and the annulus pressure of the carbon dioxide injection oil production well at the beginning of the test, the second wellhead temperature and the second annulus pressure are the wellhead temperature and the annulus pressure at the end of the test, and the first compression factor and the second compression factor correspond to the compression factors of the first produced gas under the two working conditions of the beginning of the test and the end of the test, respectively; based on the tubing-casing annulus volume, the first compression factor and the second compression factor, calculating the first change amount corresponding to the number of moles of carbon dioxide gas in the tubing-casing annulus during the test, and calculating the second change amount corresponding to the volume of carbon dioxide gas based on the first change amount; based on the second change amount and the test duration, calculating the instantaneous gas production rate of the carbon dioxide gas of the carbon dioxide injection oil production well during the test.

2. The method of claim 1, wherein, Based on the casing radius, the tubing radius and the gas column height in the tubing-casing annulus, the tubing-casing annulus volume of the carbon dioxide injection oil production test area well is calculated, comprising: the casing radius, the tubing radius and the gas column height in the tubing-casing annulus are retrieved, and the tubing-casing annulus volume is calculated based on a first mathematical model, wherein the first mathematical model is: where r c is the casing radius, r t is the tubing radius, h is the gas column height in the tubing-casing annulus, V an is the tubing-casing annulus volume.

3. The method of claim 1, wherein, based on the tubing-casing annulus volume, the first compression factor and the second compression factor, the first change amount corresponding to the number of moles of carbon dioxide gas in the tubing-casing annulus during the test is calculated, comprising: based on the tubing-casing annulus volume, the first compression factor and the second compression factor, the first change amount is calculated through a second mathematical model, wherein the second mathematical model is: where P1 is the first annulus pressure, P2 is the second annulus pressure, R is the universal gas constant for the produced gas, which has a value of 8.314 J / (mol-K), T1 is the first wellhead temperature, T2 is the second wellhead temperature, V an is the tubing and casing annulus volume, Z1 is the first compressibility factor, Z2 is the second compressibility factor, φ1 is the mole fraction of carbon dioxide in the produced gas at the beginning of the test, φ2 is the mole fraction of carbon dioxide in the produced gas at the end of the test, n 1CO2 is the number of moles of carbon dioxide gas in the tubing and casing annulus at the beginning of the test, n 2CO2 is the number of moles of carbon dioxide gas in the tubing and casing annulus at the end of the test, Δn CO2 is the first change in the number of moles of carbon dioxide gas in the tubing and casing annulus during the test.

4. The method of claim 1, wherein, based on the first change amount, the second change amount corresponding to the volume of carbon dioxide gas is calculated, comprising: the second change amount is calculated through a third mathematical model based on the change amount, wherein the third mathematical model is: ΔV CO2 = 22.4 x 10 -3 × Δn CO2 ; In the formula, Δn CO2 is a first change amount corresponding to the number of moles of carbon dioxide gas in the oil-casing annulus during the test, ΔV CO2 is a second change amount of the volume of carbon dioxide gas during the test.

5. The method of claim 1, wherein, based on the second change amount and the test duration, the instantaneous gas production rate of the carbon dioxide gas of the carbon dioxide injection oil production well during the test is calculated, comprising: based on the second change amount and the test duration, the instantaneous gas production rate is calculated through a fourth mathematical model, wherein the fourth mathematical model is: In the formula, ΔV CO2 Δt represents the second change in the volume of carbon dioxide gas during the test, and Δt represents the test duration.

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