Method, device and equipment for calculating volume of fluid injected into single tube in parallel core displacement experiment and medium

Abstract

The invention provides a method, a device and equipment for calculating the volume of a single-tube injected fluid in a parallel core displacement experiment and a medium. The calculation method comprises the following steps: determining basic data of crude oil and injected gas under formation temperature and preset pressure; carrying out a gas-water alternative flooding experiment on the double-tube parallel core to obtain the outflow volumes of different types of fluids in a single tube; and according to the basic data and the outflow volume, calculating the volume of the single-pipe injection fluid at different stages. The injection volume of each single pipe is obtained through calculation, then the volume value of specific fluid injected into the low-permeability rock core and the high-permeability rock core can be analyzed, the injection capacity of different permeability layers can be analyzed easily, and the influence of interlayer heterogeneity on the oil reservoir displacement effect can be visually known conveniently.

Description

Technical Field

[0001] The invention belongs to the field of petroleum and natural gas development, and relates to a method, device, equipment and medium for calculating the volume of fluid injected into a single tube in a parallel core displacement experiment. Background Art

[0002] Reservoir heterogeneity is one of the important factors affecting the development effect of oil and gas reservoirs. Due to the difference in mobility between the injected fluid and the formation crude oil, the injected fluid often flows preferentially along the permeability-dominant channel during water and gas injection development, resulting in premature water flooding or gas channeling of the high permeability layer, while the low permeability layer is difficult to be effectively mobilized, and a large amount of residual oil is difficult to recover. Water flooding and gas channeling caused by reservoir heterogeneity have become the key to restricting further improvement of the recovery rate of such oil and gas reservoirs.

[0003] At present, the influence of reservoir interlayer heterogeneity on reservoir displacement effect can be simulated by double-tube parallel core displacement experiment. CN108361007B discloses a low-permeability reservoir multi-layer injection and production physical simulation device and method, which can realize the physical simulation of multi-layer injection and production of low-permeability reservoirs, and obtain the oil and water production characteristics and microscopic distribution characteristics of different core samples. Although researchers can use this device to conduct double-tube parallel core gas-water alternating displacement experiments, since the device has only one water injection port in the gas-water displacement experiment, it is impossible to compare and analyze the specific volume of fluid injected into the low-permeability and high-permeability cores, and it is difficult to analyze the injection capacity of different permeability layers.

[0004] Therefore, a method for calculating the volume of fluid injected into a single tube in a dual-tube parallel core flooding experiment is provided to calculate the volume of fluid injected into each single tube, so as to intuitively understand the influence of interlayer heterogeneity on reservoir flooding effect. Summary of the invention

[0005] The purpose of the present invention is to provide a method, device, equipment and medium for calculating the volume of fluid injected into a single tube in a parallel core displacement experiment. The injection volume of each single tube is obtained by calculation, and then the specific fluid volume values ​​injected into the low-permeability core and the high-permeability core can be analyzed, which is helpful for analyzing the injection capacity of different permeability layers and facilitating intuitive understanding of the influence of interlayer heterogeneity on the displacement effect of the reservoir.

[0006] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0007] The present invention provides a method for calculating the volume of fluid injected into a single tube in a parallel core flooding experiment, the method comprising:

[0008] Determine the basic data of crude oil and injected gas at formation temperature and preset pressure;

[0009] Conduct gas-water alternating flooding experiments on double-tube parallel cores to obtain the outflow volumes of different types of fluids in a single tube;

[0010] The volume of fluid injected into a single tube at different stages is calculated according to the basic data and the outflow volume.

[0011] In the present invention, the specific device of the gas-water alternating flooding experiment of the double-tube parallel core is not limited, and those skilled in the art can select it according to the actual situation, such as the device provided by CN108361007B. The core permeability selected for each sample tube in the parallel core is different.

[0012] The calculation method provided by the present invention first determines the basic data of crude oil and injected gas, then conducts a gas-water alternating flooding experiment of a double-tube parallel core, obtains the outflow volume of different types of fluids in a single tube, and finally calculates the volume of injected fluids in a single tube at different stages according to the basic data and the outflow volume, obtains the injection volume of each single tube, and then can analyze the specific fluid values ​​injected into the low-permeability core and the high-permeability core, which is helpful to analyze the injection capacity of different permeability layers and facilitates intuitive understanding of the influence of interlayer heterogeneity on the displacement effect of the reservoir.

[0013] As a preferred technical solution of the present invention, the basic data include the dissolved gas-oil ratio of crude oil, the compression factor of injected gas, the volume coefficient of crude oil, and the volume coefficient of injected gas.

[0014] In the present invention, the volume coefficient of the formation water is 1.

[0015] As a preferred technical solution of the present invention, the crude oil includes degassed oil.

[0016] The dissolved gas-oil ratio of the crude oil is determined by directly measuring the solubility of the gas in the crude oil at the formation temperature and the preset pressure.

[0017] The volume coefficient of the crude oil is determined by performing a gas injection expansion experiment of gas and crude oil at formation temperature.

[0018] The injected gas includes natural gas.

[0019] The compression factor and volume coefficient of the injected gas are determined according to the compression factor chart of natural gas at the apparent contrast pressure and apparent contrast temperature.

[0020] As a preferred technical solution of the present invention, before conducting the gas-water alternating flooding experiment, the process further includes: determining core parameters.

[0021] Determining the core parameters includes: determining any one or a combination of at least two of the length, permeability, pore volume, porosity, hydrocarbon pore volume or irreducible water saturation of the cores in different sample tubes.

[0022] As a preferred technical solution of the present invention, the outflow volumes of the different types of fluids include the outflow volume of crude oil, the outflow volume of injected gas and the outflow volume of formation water.

[0023] As a preferred technical solution of the present invention, the different stages include a stage where neither the injected gas nor the formation water breaks through, a stage where only the injected gas breaks through, a stage where only the formation water breaks through, and a stage where both the injected gas and the formation water break through.

[0024] In the present invention, the injection gas breakthrough stage is when the dissolved gas-oil ratio changes; the formation water breakthrough stage is when water flows out from the outlet.

[0025] The calculation specifically includes the following situations:

[0026] (1) When neither the injected gas nor the formation water has broken through, V1 = V or ;or

[0027] (2) When only injected gas breaks through but formation water does not break through, V2 = V R +V or ;or

[0028] (3) When only formation water breaks through and injected gas does not break through, V3 = V wr +V or ;or

[0029] (4) When both injected gas and formation water break through, V4 = V R +V or +V wr ;

[0030] Among them, V1, V2, V3, and V4 are the volumes of fluid injected into a single tube at different stages; V or is the volume of crude oil under the corresponding experimental conditions; V R V is the underground volume of injected gas; wr is the underground volume of formation water.

[0031] As a preferred technical solution of the present invention, the V or The calculation formula is shown in formula (I):

[0032] V or =B o ×V os (I)

[0033] Among them, B o is the volume coefficient of crude oil; V os is the outflow volume of crude oil;

[0034] The V R The calculation formula is shown in formula (II):

[0035] V R =B g ×(V gs -V os ×R s )(II)

[0036] Among them, V gs V is the outflow volume of injected gas; os is the outflow volume of crude oil; R s B is the dissolved gas-oil ratio of crude oil; g is the volume coefficient of injected gas;

[0037] The V wr The calculation formula is shown in formula (III):

[0038] V wr =B w ×V ws (III)

[0039] Among them, B w is the volume coefficient of formation water, V ws is the outflow volume of formation water.

[0040] In a second aspect, the present invention provides a device for calculating the volume of fluid injected into a single tube in a parallel core flooding experiment, the device comprising:

[0041] A basic data determination module is used to determine the basic data of crude oil and injected gas at formation temperature and preset pressure;

[0042] The experimental module is used to conduct a three-phase fluid alternating flooding experiment on a double-tube parallel core to obtain the outflow volume of the three-phase fluid in a single tube;

[0043] The calculation module is used to calculate the volume of fluid injected into the single tube at different stages according to the basic data and the outflow volume.

[0044] In a third aspect, the present invention provides an electronic device, characterized in that the electronic device comprises:

[0045] at least one processor; and

[0046] a memory communicatively connected to the at least one processor; wherein,

[0047] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the method for calculating the volume of fluid injected into a single tube in a parallel core displacement experiment described in the first aspect.

[0048] In a fourth aspect, the present invention provides a computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable a processor to implement the method for calculating the volume of fluid injected into a single tube in the parallel core displacement experiment described in the first aspect when executed.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] The calculation method provided by the present invention first determines the basic data of crude oil and injected gas, then conducts a gas-water alternating flooding experiment of a double-tube parallel core, obtains the outflow volume of different types of fluids in a single tube, and finally calculates the volume of injected fluids in a single tube at different stages according to the basic data and the outflow volume, obtains the injection volume of each single tube, and then can analyze the specific volume values ​​of fluids injected into low-permeability cores and high-permeability cores, which is helpful for analyzing the injection capacity of different permeability layers and facilitates intuitive understanding of the influence of interlayer heterogeneity on the displacement effect of the reservoir. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A flow chart of a method for calculating the volume of fluid injected into a single tube in a dual-tube parallel core flooding experiment provided in Example 1;

[0052] Figure 2 A graph showing the change in volume of injected fluid in each single tube in the dual-tube parallel core flooding experiment provided in Example 2;

[0053] Figure 3 Schematic diagram of the structure of a device for calculating the volume of fluid injected into a single tube in a double-tube parallel core flooding experiment provided in Example 3;

[0054] Figure 4 It is a schematic diagram of the structure of an electronic device for implementing a method for calculating the volume of fluid injected into a single tube in a dual-tube parallel core displacement experiment provided in Example 4. DETAILED DESCRIPTION

[0055] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0056] It should be noted that the terms "first", "second", "candidate", "target", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0057] Example 1

[0058] This embodiment provides a method for calculating the volume of fluid injected into a single tube in a dual-tube parallel core flooding experiment. Figure 1 As shown, the calculation method includes:

[0059] S110, determining basic data of crude oil and injected gas at formation temperature and preset pressure;

[0060] In step S110, the basic data includes the dissolved gas-oil ratio of crude oil, the compression factor of injected gas, the volume coefficient of crude oil, and the volume coefficient of injected gas;

[0061] Specifically, the crude oil includes degassed oil;

[0062] The dissolved gas-oil ratio of the crude oil is determined by directly measuring the solubility of the gas in the crude oil at the formation temperature and the preset pressure;

[0063] The volume coefficient of the crude oil is determined by performing a gas injection expansion experiment of gas and crude oil at formation temperature;

[0064] The injected gas includes natural gas;

[0065] The compression factor and volume coefficient of the injected gas are determined according to the compression factor chart of natural gas at the apparent contrast pressure and apparent contrast temperature.

[0066] S120, conducting a gas-water alternating flooding experiment on a double-tube parallel core to obtain the outflow volume of different types of fluids in a single tube;

[0067] In step S120, before performing the gas-water alternating flooding experiment, the process further includes: determining core parameters;

[0068] Specifically, the determining of core parameters includes: determining any one or a combination of at least two of the length, permeability, pore volume, porosity, hydrocarbon pore volume or irreducible water saturation of the cores in different sample tubes;

[0069] Specifically, the outflow volumes of the different types of fluids include the outflow volume of crude oil, the outflow volume of injected gas and the outflow volume of formation water.

[0070] S130, calculating the volume of fluid injected into a single tube at different stages according to the basic data and the outflow volume;

[0071] In step S130, the different stages include a stage where neither the injected gas nor the formation water breaks through, a stage where only the injected gas breaks through, a stage where only the formation water breaks through, and a stage where both the injected gas and the formation water break through;

[0072] Specifically, the calculation includes the following situations:

[0073] (1) When neither the injected gas nor the formation water has broken through, V1 = V or ;or

[0074] (2) When only injected gas breaks through but formation water does not break through, V2 = V R +V or ;or

[0075] (3) When only formation water breaks through and injected gas does not break through, V3 = V wr +V or ;or

[0076] (4) When both injected gas and formation water break through, V4 = V R +V or +V wr ;

[0077] Among them, V1, V2, V3, and V4 are the volumes of fluid injected into a single tube at different stages; V or is the volume of crude oil under the corresponding experimental conditions; V R V is the underground volume of injected gas; wr is the underground volume of formation water.

[0078] Specifically, the V or The calculation formula is shown in formula (I):

[0079] V or =B o ×V os (I)

[0080] Among them, B o is the volume coefficient of crude oil; V os is the outflow volume of crude oil;

[0081] Specifically, the V R The calculation formula is shown in formula (II):

[0082] V R =B g ×(V gs -V os ×R s )(II)

[0083] Among them, V gs V is the outflow volume of injected gas; os is the outflow volume of crude oil; R s B is the dissolved gas-oil ratio of crude oil; g is the volume coefficient of injected gas;

[0084] Specifically, the V wr The calculation formula is shown in formula (III):

[0085] V wr =B w ×V ws (III)

[0086] Among them, B w is the volume coefficient of formation water, V ws is the outflow volume of formation water.

[0087] Example 2

[0088] This embodiment takes the cores with permeabilities of 587mD and 1758mD as the research objects, so as to further explain the composition of the specific technical solution.

[0089] This embodiment provides a method for calculating the volume of fluid injected into a single tube in a dual-tube parallel core flooding experiment, including:

[0090] S110, determining basic data of degassed oil and injected gas at formation temperature and preset pressure;

[0091] The degassed oil sample was obtained on site, and the dissolved gas-oil ratio was 298.95m 3 / m 3 The formation fluid samples were prepared. The components of the degassed oil samples used were shown in Table 1, and the components of the natural gas used were shown in Table 2.

[0092] Table 1

[0093]

[0094]

[0095] Table 2

[0096]

[0097] According to the measurement or experimental method provided in Example 1, the experimental formation fluid gas-oil ratio R s 298.95m 3 / m 3 , the volume coefficient B of degassed oil is determined by gas injection expansion experiment o =1.58; Based on the formation pressure of 66.21MPa, the formation temperature of 110℃, the critical pressure and critical temperature of natural gas, the apparent contrast pressure P is calculated. pc is 14.75, depending on the contrast temperature T pc is 1.67, and according to the compression factor chart of natural gas, the compression factor Z of natural gas is 1.41, and the volume coefficient B of natural gas is g It is 0.00278.

[0098] In this embodiment, the volume coefficient of formation water is B w Take 1.

[0099] S120, conducting a gas-water alternating flooding experiment on a double-tube parallel core to obtain the outflow volume of different types of fluids in a single tube;

[0100] The parameters of the double-tube parallel core used are shown in Table 3;

[0101] Table 3

[0102]

[0103] The volume V of degassed oil flowing out of the core outlet in different sample tubes os 、Natural gas volume V gs and the formation water volume V ws The results are shown in Table 4;

[0104] Table 4

[0105]

[0106]

[0107] S130, calculating the volume of fluid injected into a single tube at different stages according to the basic data and the outflow volume;

[0108] According to the calculation method provided in Example 1, the volume change of the injected fluid in each single tube is shown in Table 5 and Figure 2 As shown;

[0109] Table 5

[0110]

[0111] It can be seen from Table 5 that by calculating the volume of fluid injected into a single tube in a dual-tube parallel core, the specific volume values ​​of fluid injected into low-permeability cores and high-permeability cores can be analyzed, which is helpful for analyzing the injection capacity of different permeability layers and intuitively understanding the impact of interlayer heterogeneity on reservoir displacement effect.

[0112] Example 3

[0113] This embodiment provides a device for calculating the volume of fluid injected into a single tube in a dual-tube parallel core flooding experiment. The device (eg Figure 3 The device is suitable for calculating the volume of fluid injected into a single tube in a double-tube parallel core displacement experiment, analyzing the injection capacity of layers with different permeabilities, and intuitively understanding the influence of interlayer heterogeneity on the displacement effect of the reservoir. The device includes: a basic data determination module 110, an experimental module 120, and a calculation module 130, wherein:

[0114] The basic data determination module 110 is used to determine the basic data of crude oil and injected gas at formation temperature and preset pressure;

[0115] Experimental module 120, for conducting a three-phase fluid alternating flooding experiment of a double-tube parallel core to obtain the outflow volume of the three-phase fluid in a single tube;

[0116] The calculation module 130 is used to calculate the volume of fluid injected into a single tube at different stages according to the basic data and the outflow volume.

[0117] The device provided in this embodiment can execute the method for calculating the volume of fluid injected into a single tube in a double-tube parallel core displacement experiment provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution method.

[0118] Example 4

[0119] This embodiment provides an electronic device for implementing a method for calculating the volume of fluid injected into a single tube in a dual-tube parallel core displacement experiment, such as Figure 4 As shown, the electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present application described and / or required herein.

[0120] like Figure 4As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0121] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a second storage area, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0122] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the calculation method of the volume of fluid injected into a single tube in a parallel core displacement experiment.

[0123] In some embodiments, the method for calculating the volume of fluid injected into a single tube in a dual-tube parallel core displacement experiment can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the method for calculating the volume of fluid injected into a single tube in a dual-tube parallel core displacement experiment described above can be executed. Alternatively, in other embodiments, the processor 11 can be configured to execute the method for calculating the volume of fluid injected into a single tube in a parallel core displacement experiment in any other appropriate manner (for example, by means of firmware).

[0124] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0125] Computer programs for implementing the methods of the present application may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable target determination device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0126] In the context of the present application, a computer readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device or equipment. A computer readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer readable storage medium may be a machine readable signal medium. A more specific example of a machine readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0127] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0128] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0129] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0130] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this application can be executed in parallel, sequentially or in different orders, as long as the information expected by the technical solution of this application can be achieved, and this document is not limited here.

[0131] The applicant declares that the present invention illustrates the detailed structural features of the present invention through the above-mentioned embodiments, but the present invention is not limited to the above-mentioned detailed structural features, that is, it does not mean that the present invention must rely on the above-mentioned detailed structural features to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of the components selected by the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A method for calculating the volume of fluid injected into a single tube in a parallel core flooding experiment, characterized in that: The calculation method includes: Determine the basic data of crude oil and injected gas at formation temperature and preset pressure; Conduct gas-water alternating flooding experiments on double-tube parallel cores to obtain the outflow volumes of different types of fluids in a single tube; The volume of fluid injected into a single tube at different stages is calculated according to the basic data and the outflow volume.

2. The calculation method according to claim 1, characterized in that: The basic data include the dissolved gas-oil ratio of crude oil, the compression factor of injected gas, the volume coefficient of crude oil, and the volume coefficient of injected gas.

3. The calculation method according to claim 2, characterized in that: The crude oil includes degassed oil; The dissolved gas-oil ratio of the crude oil is determined by directly measuring the solubility of the gas in the crude oil at the formation temperature and the preset pressure; The volume coefficient of the crude oil is determined by performing a gas injection expansion experiment of gas and crude oil at formation temperature; The injected gas includes natural gas; The compression factor and volume coefficient of the injected gas are determined according to the compression factor chart of natural gas at the apparent contrast pressure and apparent contrast temperature.

4. The calculation method according to claim 1, characterized in that: Before conducting the gas-water alternating flooding experiment, the following steps are also included: determining core parameters; Determining the core parameters includes: determining any one or a combination of at least two of the length, permeability, pore volume, porosity, hydrocarbon pore volume or irreducible water saturation of the cores in different sample tubes.

5. The calculation method according to claim 1, characterized in that: The outflow volumes of the different types of fluids include the outflow volume of crude oil, the outflow volume of injected gas and the outflow volume of formation water.

6. The calculation method according to claim 1, characterized in that: The different stages include a stage where neither the injected gas nor the formation water has broken through, a stage where only the injected gas has broken through, a stage where only the formation water has broken through, and a stage where both the injected gas and the formation water have broken through; The calculation specifically includes the following situations: (1) When neither the injected gas nor the formation water has broken through, V1 = V or ;or (2) When only injected gas breaks through but formation water does not break through, V2 = V R +V or ;or (3) When only formation water breaks through and injected gas does not break through, V3 = V wr +V or ;or (4) When both injected gas and formation water break through, V4 = V R +V or +V wr ; Among them, V1, V2, V3, and V4 are the volumes of fluid injected into a single tube at different stages; V or is the volume of crude oil under the corresponding experimental conditions; V R V is the underground volume of injected gas; wr is the underground volume of formation water.

7. The calculation method according to claim 6, characterized in that: The V or The calculation formula is shown in formula (I): V or =B o ×V os (I) Among them, B o is the volume coefficient of crude oil; V os is the outflow volume of crude oil; The V R The calculation formula is shown in formula (II): V R =B g ×(V gs -V os ×R s )(II) Among them, V gs V is the outflow volume of injected gas; os is the outflow volume of crude oil; R s B is the dissolved gas-oil ratio of crude oil; g is the volume coefficient of injected gas; The V wr The calculation formula is shown in formula (III): V wr =B w ×V ws (III) Among them, B w is the volume coefficient of formation water, V ws is the outflow volume of formation water.

8. A device for calculating the volume of fluid injected into a single tube in a parallel core flooding experiment, characterized in that: The computing device comprises: A basic data determination module is used to determine the basic data of crude oil and injected gas at formation temperature and preset pressure; The experimental module is used to conduct a three-phase fluid alternating flooding experiment on a double-tube parallel core to obtain the outflow volume of the three-phase fluid in a single tube; The calculation module is used to calculate the volume of fluid injected into the single tube at different stages according to the basic data and the outflow volume.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the method for calculating the volume of fluid injected into a single tube in a parallel core displacement experiment as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method for calculating the volume of fluid injected into a single tube in a parallel core displacement experiment as described in any one of claims 1 to 7 when executed.

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