Plate preparation method, system and device for evaluating gas injection utilization rate of gas drive reservoir

Abstract

The invention discloses a plate preparation method, system and device for evaluating the gas injection utilization rate of a gas drive reservoir. The monthly underground liquid production capacity is calculated according to the monthly underground oil production capacity and the monthly underground water production capacity; the gas-liquid ratio is calculated through the monthly underground gas production rate and the monthly underground liquid production rate; the gas production rate is calculated through the monthly underground gas production rate and the monthly underground gas injection rate; the monthly underground injection-production ratio is calculated according to the monthly underground gas injection amount, the monthly underground water yield, the monthly underground oil yield and the monthly underground gas yield; gas production rates under different monthly underground injection-production ratios are represented through the gas-liquid ratio, and a gas injection utilization rate evaluation chart is obtained. The invention provides the chart directly used for evaluating the gas injection utilization rate of the gas-driven reservoir, and the chart is visual, simple, clear and accurate; actual production data of the gas drive reservoir are put into the gas production rate chart, the gas injection utilization rate of the gas drive reservoir can be visually displayed through comparison, then the gas injection utilization rate is evaluated, and powerful reference is provided for gas injection adjustment in real time.

Description

Technical Field

[0001] The invention belongs to the technical field of gas injection utilization rate evaluation of gas drive oil reservoirs, and in particular relates to a method, system and device for preparing a chart for evaluating the gas injection utilization rate of gas drive oil reservoirs. Background Art

[0002] Indoor experimental research, theoretical evaluation and field development practice show that gas injection is one of the effective means to improve oil reservoir recovery. For gas-driven oil reservoirs, the purpose of gas injection is to control gas production, increase underground gas injection volume, and maximize oil reservoir recovery by improving the utilization efficiency of injected gas.

[0003] However, there has been a lack of gas injection utilization evaluation methods in the industry; therefore, it is necessary to propose a gas injection utilization evaluation method for gas drive development reservoirs, especially a gas recovery rate plate preparation method and evaluation system for evaluating gas injection utilization in gas drive reservoirs.

[0004] The patent publication number is CN104453804A, and the name is a patent application for a method for dynamic monitoring and evaluation of gas-driven oil reservoir development. This method is based on the characterization relationship of the oil-gas relative permeability ratio of the gas-driven oil reservoir, and establishes a gas-driven oil reservoir gas-driven characteristic curve relationship and a development index prediction relationship. By introducing the concept of the limit gas-oil ratio, initial conditions and boundary conditions, the application of the new gas-driven characteristic curve relationship involved in the patent application can predict the geological reserves, recoverable reserves and calibrated recovery rate of the oil field; at the same time, it further derives and establishes a theoretical relationship chart of dimensionless gas fractional flow and recovery degree. However, this patent application cannot intuitively and continuously evaluate the gas injection utilization rate of the gas-driven oil reservoir.

[0005] The patent application number is CN110543619A, and the name is a patent application for a method for predicting recoverable reserves and evaluating development effects of a gas-driven oil reservoir. The method of the patent application starts from the oil-gas two-phase seepage law, based on the exponential function relationship between gas-oil phase permeability, and through the material balance equation and Darcy's law, a new gas-drive characteristic curve relationship between the gas-oil ratio and the cumulative oil production under the stable seepage conditions of the gas-driven oil field is derived, which reduces the use of uncertain parameters and provides a reliable reservoir engineering method for calculating recoverable reserves in the middle and late stages of gas-driven oil field development; further, a gas-driven oil reservoir development effect evaluation chart is drawn through the derivation of the gas-drive characteristic curve, which intuitively describes the internal relationship between the gas-oil ratio, the degree of recovery and the recovery factor, and provides a basis for the evaluation of the effects of oilfield measures, comprehensive adjustments, etc. However, the patent application cannot provide a reference for gas injection adjustment measures in real time. Summary of the invention

[0006] In order to overcome the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a method, system and device for preparing a plate for evaluating the gas injection utilization rate of a gas-driven oil reservoir, so as to accurately evaluate the gas injection utilization rate of a gas-driven oil reservoir.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] A method for preparing a chart for evaluating gas injection utilization rate of a gas drive reservoir comprises the following steps:

[0009] S1: monthly oil production, monthly water production, monthly gas production and monthly gas injection are processed into monthly underground oil production, monthly underground water production, monthly underground gas production and monthly underground gas injection measured by underground volume respectively;

[0010] S2: Calculate the monthly underground liquid production by using the monthly underground oil production and the monthly underground water production;

[0011] S3: Calculate the gas-liquid ratio by the monthly underground gas production and the monthly underground liquid production;

[0012] S4: Calculate the gas recovery rate by monthly underground gas production and monthly underground gas injection;

[0013] S5: Calculate the monthly underground injection-production ratio by using the monthly underground gas injection volume, the monthly underground water production volume, the monthly underground oil production volume and the monthly underground gas production volume;

[0014] S6: The gas-liquid ratio is used to represent the gas production rate under different monthly underground injection-production ratios, and a gas injection utilization rate evaluation chart is obtained.

[0015] Optionally, the calculation formulas for monthly underground oil production, monthly underground water production, monthly underground gas production, and monthly underground gas injection are as follows:

[0016]

[0017]

[0018] ΔQ g =G p *B gp

[0019] ΔG inj =G inj *B ginj

[0020] Where: △Q o is the monthly underground oil production, in ten thousand cubic meters; N p is the monthly surface oil production, in 10,000 tons; o is the density of crude oil, in units of 10,000 tons per 10,000 cubic meters; B oi is the crude oil volume coefficient, dimensionless;

[0021] △Q w is the monthly underground water production, in ten thousand cubic meters; W p is the monthly surface water production, in 10,000 tons; ρ wB is the formation water density, in units of 10,000 tons per 10,000 cubic meters; w is the formation water volume coefficient, dimensionless;

[0022] △Q g is the monthly underground gas production, in ten thousand cubic meters; G p is the monthly surface gas production, in ten thousand cubic meters; B gp is the volume coefficient of produced gas, dimensionless;

[0023] △G inj G is the monthly underground gas injection volume, in ten thousand cubic meters; inj is the monthly surface gas injection volume, in ten thousand cubic meters; B ginj is the injected gas volume coefficient, dimensionless.

[0024] Optionally, there is no order of calculation among step S3, step S4 and step S5.

[0025] Optionally, in step S3, the gas-liquid ratio is calculated by the following formula:

[0026]

[0027] Where: R gL is the gas-liquid ratio, decimal;

[0028] △Q g is the monthly underground gas production, in ten thousand cubic meters;

[0029] G L It is the monthly underground liquid production, in ten thousand cubic meters.

[0030] Optionally, in step S4, the gas recovery rate is calculated by the following formula:

[0031]

[0032] Where: RR g is the gas recovery rate, decimal;

[0033] △Q g is the monthly underground gas production, ten thousand cubic meters;

[0034] △G inj The amount of gas injected into the underground of the moon is ten thousand cubic meters.

[0035] Optionally, in step S5, the monthly underground injection-production ratio is calculated by the following formula:

[0036]

[0037] Where: △Z inj-p is the ratio of underground injection to mining on the moon, dimensionless;

[0038] △G injThe monthly underground gas injection volume is 10,000 cubic meters;

[0039] △Q o The monthly underground oil production is 10,000 cubic meters;

[0040] △Q w is the monthly underground water production, 10,000 cubic meters;

[0041] △Q g The monthly underground gas production is 10,000 cubic meters.

[0042] Optionally, in step S6, the gas recovery rate is expressed by the following formula:

[0043]

[0044] Where: RR g is the gas recovery rate, decimal;

[0045] △Z inj-p is the ratio of underground injection to mining on the moon, dimensionless;

[0046] R gL is the gas-liquid ratio, a decimal.

[0047] The device for preparing a plate for evaluating the utilization rate of gas injection in a gas-driven oil reservoir comprises:

[0048] The first processing module is used to process the monthly oil production, monthly water production, monthly gas production, and monthly gas injection into monthly underground oil production, monthly underground water production, monthly underground gas production, and monthly underground gas injection measured by underground volume, respectively;

[0049] The second processing module is used to calculate the monthly underground liquid production by using the monthly underground oil production and the monthly underground water production;

[0050] The third processing module is used to calculate the gas-liquid ratio according to the monthly underground gas production and the monthly underground liquid production;

[0051] A fourth processing module is used to calculate the gas recovery rate according to the monthly underground gas production and the monthly underground gas injection volume;

[0052] A fifth processing module is used to calculate the monthly underground injection-production ratio through the monthly underground gas injection volume, the monthly underground water production volume, the monthly underground oil production volume and the monthly underground gas production volume;

[0053] The sixth processing module is used to express the gas production rate under different monthly underground injection-production ratios through the gas-liquid ratio, and obtain a gas injection utilization rate evaluation chart.

[0054] An electronic device comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the method for preparing a plate for evaluating the gas injection utilization rate of a gas-driven oil reservoir are implemented.

[0055] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the method for preparing a plate for evaluating the gas injection utilization rate of a gas-driven oil reservoir.

[0056] Compared with the prior art, the present invention has the following beneficial effects:

[0057] The present invention innovatively derives and establishes a theoretical relationship chart of gas recovery rate, monthly underground injection-production ratio, and gas-liquid ratio. By putting the actual gas injection development oil reservoir's gas recovery rate and gas-liquid ratio production data into the theoretical relationship chart, the gas injection utilization rate of the gas-drive oil reservoir can be intuitively evaluated. The operation is very convenient and simple. By comparing the actual production data with the theoretical chart, the gas injection utilization rate of the gas-drive oil reservoir can be very intuitively and continuously evaluated, providing a reference for gas injection adjustment in real time. The industry has always lacked a method for evaluating the gas injection utilization rate of gas-drive oil reservoirs, and it is impossible to provide a reference for gas injection adjustment measures in real time. The present invention provides a chart directly used to evaluate the gas injection utilization rate of gas-drive oil reservoirs, which is intuitive, simple, clear and accurate; that is, the actual production data of the gas-drive oil reservoir is put into the gas recovery rate chart, and by comparison, the gas injection utilization rate of the gas-drive oil reservoir can be intuitively displayed, and then the gas injection utilization rate can be evaluated, providing a strong reference for gas injection adjustment in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way.

[0059] In the attached picture:

[0060] Figure 1 It is a flow chart of the calculation steps of the present invention;

[0061] Figure 2 It is a schematic diagram of the relationship between variables of the present invention;

[0062] Figure 3 A schematic diagram of gas production rate and gas-liquid ratio in an embodiment of the present invention. DETAILED DESCRIPTION

[0063] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0064] It should be understood by those skilled in the art that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0065] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0066] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0067] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0068] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0069] It should be noted that in the claims, any reference signs placed between brackets shall not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The present application may be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0070] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0071] The present invention is described in detail below with reference to the accompanying drawings.

[0072] like Figure 1 As shown, the method for preparing a plate for evaluating gas injection utilization rate of a gas drive reservoir of the present invention comprises the following steps:

[0073] 1) Monthly underground oil production processing

[0074] Since the monthly underground oil production N in the comprehensive data table of oilfield development p Measured in mass units of 10,000 tons, in order to facilitate unification and calculation, the monthly underground oil production needs to be converted into underground volume measured in 10,000 cubic meters; the specific method is to divide the monthly underground oil production by the density of crude oil, and then multiply it by the crude oil volume coefficient.

[0075]

[0076] 2) Monthly underground water production treatment

[0077] Since the monthly underground water production W in the comprehensive data table of oilfield development p Measured in mass units of 10,000 tons, in order to facilitate unification and calculation, the monthly groundwater production needs to be converted into underground volume measured in 10,000 cubic meters; the specific method is to divide the monthly groundwater production by the formation water density, and then multiply it by the formation water volume coefficient.

[0078]

[0079] 3) Processing of monthly underground liquid production

[0080] The monthly underground liquid production is the sum of the underground volumes of the monthly underground oil production and the monthly underground water production.

[0081]

[0082] Where: G L is the monthly underground liquid production and underground volume, ten thousand cubic meters;

[0083] △Q o is the monthly underground oil production and underground volume, ten thousand cubic meters;

[0084] △Q w is the monthly underground water production and underground volume, ten thousand cubic meters;

[0085] N p is the monthly underground oil production in terms of surface mass, 10,000 tons;

[0086] W p is the monthly underground water production surface mass, 10,000 tons;

[0087] ρ o is the density of crude oil, tons / cubic meter;

[0088] B oi is the crude oil volume coefficient, dimensionless;

[0089] ρ w is the formation water density, tons / cubic meter;

[0090] B w is the formation water volume coefficient, dimensionless.

[0091] 4) Monthly underground gas injection volume processing

[0092] Since the monthly underground gas injection volume △G in the comprehensive data table of oilfield development inj The monthly underground gas injection volume is measured in ten thousand cubic meters of ground volume. In order to facilitate unification and calculation, the monthly underground gas injection volume needs to be converted into underground volume measured in ten thousand cubic meters. The specific method is to multiply the monthly underground gas injection volume by the injected gas formation volume coefficient.

[0093] ΔG inj =G inj *B ginj (4)

[0094] Where: △G inj is the volume of monthly underground gas injection, 10,000 cubic meters; G inj is the volume of gas injected into the lunar surface, ten thousand cubic meters; B ginj is the injected gas volume coefficient, dimensionless.

[0095] 5) Monthly underground gas production processing

[0096] Since the monthly underground gas production G in the oilfield development comprehensive data table pThe monthly underground gas production is measured in ten thousand cubic meters of ground volume. In order to facilitate unification and calculation, the monthly underground gas production needs to be converted into underground volume measured in ten thousand cubic meters. The specific method is to multiply the monthly underground gas production by the volume coefficient of the producing gas formation.

[0097] ΔQ g =G p *B gp (5)

[0098] Where: △Q g Monthly underground gas production and underground volume, 10,000 cubic meters; G p B is the monthly underground gas production and the surface volume, ten thousand cubic meters; gp is the volume coefficient of produced gas, dimensionless.

[0099] 6) Calculation of gas recovery rate

[0100] The gas recovery rate is defined as the monthly underground gas production divided by the monthly underground gas injection volume. It should be noted that the monthly underground gas production and the monthly underground gas injection volume should be measured in ten thousand cubic meters of underground volume.

[0101]

[0102] 7) Calculation of gas-liquid ratio

[0103] The gas-liquid ratio is defined as the monthly underground gas production divided by the monthly underground liquid production. It should be noted that the monthly underground gas production and the monthly underground liquid production should be measured in ten thousand cubic meters of underground volume.

[0104]

[0105] 8) Establishment of gas recovery rate and gas-liquid ratio chart

[0106] The monthly underground injection-production ratio is defined as the monthly underground gas injection volume divided by the monthly output volume (the monthly output volume includes the monthly underground oil production volume, the monthly underground water production volume, and the monthly underground gas production volume):

[0107]

[0108] Where: △Z inj-p is the lunar underground injection-production ratio, dimensionless; △G inj The amount of gas injected into the underground of the moon is ten thousand cubic meters.

[0109] Substituting the monthly underground injection-production ratio into the gas recovery rate calculation formula, the result is simplified as follows:

[0110]

[0111] Where: RR g is the gas recovery rate, decimal; R gL is the gas-liquid ratio, a decimal.

[0112] Example 1

[0113] Taking the domestic X gas injection development reservoir as an example, the gas recovery rate chart preparation method and evaluation system for evaluating the gas injection utilization rate of gas drive reservoirs are introduced in detail.

[0114] Processing the X reservoir gas injection development and production data, see Table 1 for details, the crude oil density is 0.86, the crude oil volume coefficient is 1.071, the formation water density is 1.1, the formation water volume coefficient is 1, the injected gas volume coefficient and the produced gas volume coefficient are both 0.0035, and the X reservoir gas recovery rate chart is established as shown in Figure 3 .

[0115] The specific calculation steps are as follows:

[0116] Step 1: Taking the gas injection production of reservoir X in July 2014 as an example, calculate the monthly underground oil production, that is, divide the reported monthly oil production by the crude oil density 0.86, and then multiply by the crude oil volume coefficient 1.071, and get the monthly underground oil production of 1.434048837 million cubic meters.

[0117] Step 2: Calculate the monthly underground water production, that is, divide the reported monthly water production by the formation water density 1.1, and then multiply by the formation water volume coefficient 1, and the monthly underground water production is 2348454545 cubic meters.

[0118] Step 3: Add the above monthly underground oil production and monthly underground water production to obtain the monthly underground liquid production of 3782503383 cubic meters.

[0119] Step 4: Calculate the monthly underground gas injection volume. Multiply the reported monthly gas injection volume by the injected gas volume coefficient 0.0035 to obtain the monthly underground gas injection volume of 0.2957311 million cubic meters.

[0120] Step 5: Calculate the monthly underground gas production, that is, multiply the reported monthly gas production by the injected gas volume coefficient 0.0035, and obtain the monthly underground gas production of 0.029365 million cubic meters.

[0121] Step 6: Divide the above monthly underground gas production by the monthly underground gas injection volume to obtain the gas recovery rate of 0.099296286.

[0122] Step 6: Divide the monthly underground gas production by the monthly underground liquid production to obtain a gas-liquid ratio of 0.007763377;

[0123] Step 7: According to the method in the above steps, calculate the monthly underground oil production, monthly underground water production, monthly underground liquid production, monthly underground gas injection volume, monthly underground gas production, gas recovery rate and gas-liquid ratio of X reservoir at other times; in this way, the actual data points of gas recovery rate and underground volume gas-liquid ratio of X gas injection development reservoir are obtained, that is, Figure 3 Middle dot data.

[0124] Table 1

[0125]

[0126]

[0127]

[0128] Finally, according to the derived theoretical expression (9) of the gas recovery rate and gas-liquid ratio, the corresponding gas recovery rate is calculated when the injection-production ratio (0.1, 0.15, 0.2, 0.4, 0.6, 0.8, 1, 1.2) and the gas-liquid ratio take different values ​​(0.01-1). For example, when the injection-production ratio is 0.1, the underground volume gas-liquid ratio takes values ​​from 0.01 to 1.3, and the calculated gas recovery rate is 0.099009901 to 4.623655914, as shown in Table 2. The calculated data points are connected to obtain the corresponding curve for the injection-production ratio of 0.1. According to the same method, when the injection-production ratio takes different values, other lines are obtained to establish the theoretical chart of gas recovery rate and underground volume gas-liquid ratio.

[0129] Table 2

[0130]

[0131]

[0132]

[0133] Depend on Figure 3 It can be seen that in the early stage of gas injection development, the gas production volume and gas recovery rate of the X reservoir were low; however, as the gas injection progressed, the gas production volume increased, the gas recovery rate increased, and the gas injection utilization rate decreased.

[0134] Unless otherwise specified, the working modes or control modes involved in the above embodiments are all conventional working modes or control modes in the art.

[0135] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0136] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for preparing a plate for evaluating gas injection utilization rate of a gas-driven oil reservoir, characterized in that: The following steps are involved: S1: monthly oil production, monthly water production, monthly gas production and monthly gas injection are processed into monthly underground oil production, monthly underground water production, monthly underground gas production and monthly underground gas injection measured by underground volume respectively; S2: Calculate the monthly underground liquid production by using the monthly underground oil production and the monthly underground water production; S3: Calculate the gas-liquid ratio by the monthly underground gas production and the monthly underground liquid production; S4: Calculate the gas recovery rate by monthly underground gas production and monthly underground gas injection; S5: Calculate the monthly underground injection-production ratio by using the monthly underground gas injection volume, the monthly underground water production volume, the monthly underground oil production volume and the monthly underground gas production volume; S6: The gas-liquid ratio is used to represent the gas production rate under different monthly underground injection-production ratios, and a gas injection utilization rate evaluation chart is obtained.

2. The method for preparing a plate for evaluating gas injection utilization rate of a gas-driven oil reservoir according to claim 1, characterized in that: The calculation formulas for monthly underground oil production, monthly underground water production, monthly underground gas production, and monthly underground gas injection are as follows: ΔQ g =G p *B gp ΔG inj =G inj *B ginj Where: △Q o is the monthly underground oil production, in ten thousand cubic meters; N p is the monthly surface oil production, in 10,000 tons; ρ o is the density of crude oil, in units of 10,000 tons per 10,000 cubic meters; B oi is the crude oil volume coefficient, dimensionless; △Q w is the monthly underground water production, in ten thousand cubic meters; W p is the monthly surface water production, in 10,000 tons; ρ w B is the formation water density, in units of 10,000 tons per 10,000 cubic meters; w is the formation water volume coefficient, dimensionless; △Q g is the monthly underground gas production, in ten thousand cubic meters; G p is the monthly surface gas production, in ten thousand cubic meters; B gp is the volume coefficient of produced gas, dimensionless; △G inj is the monthly underground gas injection volume, in ten thousand cubic meters; G inj is the monthly surface gas injection volume, in ten thousand cubic meters; B ginj is the injected gas volume coefficient, dimensionless.

3. The method for preparing a plate for evaluating gas injection utilization rate of a gas-driven oil reservoir according to claim 1, characterized in that: There is no order of calculation among step S3, step S4 and step S5.

4. The method for preparing a plate for evaluating gas injection utilization rate of a gas-driven oil reservoir according to claim 1, characterized in that: In step S3, the gas-liquid ratio is calculated by the following formula: Where: R gL is the gas-liquid ratio, decimal; △Q g is the monthly underground gas production, in ten thousand cubic meters; G L It is the monthly underground liquid production, in ten thousand cubic meters.

5. The method for preparing a plate for evaluating gas injection utilization rate of a gas-driven oil reservoir according to claim 1, characterized in that: In step S4, the gas recovery rate is calculated by the following formula: Where: RR g is the gas recovery rate, decimal; △Q g is the monthly underground gas production, ten thousand cubic meters; △G inj The amount of gas injected into the underground of the moon is ten thousand cubic meters.

6. The method for preparing a plate for evaluating gas injection utilization rate of a gas-driven oil reservoir according to claim 1, characterized in that: In step S5, the monthly underground injection-production ratio is calculated by the following formula: Where: △Z inj-p is the ratio of underground injection to mining on the moon, dimensionless; △G inj The monthly underground gas injection volume is 10,000 cubic meters; △Q o The monthly underground oil production is 10,000 cubic meters; △Q w is the monthly underground water production, 10,000 cubic meters; △Q g The monthly underground gas production is 10,000 cubic meters.

7. The method for preparing a plate for evaluating gas injection utilization rate of a gas-driven oil reservoir according to claim 1, characterized in that: In step S6, the gas recovery rate is expressed by the following formula: Where: RR g is the gas recovery rate, decimal; △Z inj-p is the ratio of underground injection to mining on the moon, dimensionless; R gL is the gas-liquid ratio, a decimal.

8. A device for preparing a plate for evaluating the utilization rate of gas injection in a gas-driven oil reservoir, characterized in that: include: The first processing module is used to process the monthly oil production, monthly water production, monthly gas production, and monthly gas injection into monthly underground oil production, monthly underground water production, monthly underground gas production, and monthly underground gas injection measured by underground volume, respectively; The second processing module is used to calculate the monthly underground liquid production by using the monthly underground oil production and the monthly underground water production; The third processing module is used to calculate the gas-liquid ratio according to the monthly underground gas production and the monthly underground liquid production; A fourth processing module is used to calculate the gas recovery rate according to the monthly underground gas production and the monthly underground gas injection volume; A fifth processing module is used to calculate the monthly underground injection-production ratio through the monthly underground gas injection volume, the monthly underground water production volume, the monthly underground oil production volume and the monthly underground gas production volume; The sixth processing module is used to express the gas production rate under different monthly underground injection-production ratios through the gas-liquid ratio, and obtain a gas injection utilization rate evaluation chart.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for preparing a plate for evaluating gas injection utilization rate of a gas-drive reservoir as claimed in any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the steps of the method for preparing a plate for evaluating gas injection utilization rate of a gas-drive reservoir as claimed in any one of claims 1 to 7.

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