A CO2 flooding development program optimization method and device

Abstract

The present invention provides a method and device for optimizing a #imgabs0# oil recovery development plan, which relates to the technical field of oil well exploitation, including collecting relevant data of a carbon dioxide gas injection string, performing correlation analysis on the data, and comparing the data with a threshold value, thereby outputting whether the gas injection string is safe. The present invention is the first to conduct correlation analysis on the gas injection string used in #imgabs1# oil recovery development to evaluate whether the gas injection string is safe, and to conduct correlation analysis on the gas injection internal pressure, external oil pressure, the gas injection string's own buoyancy, and the axial tension generated by gravity of the gas injection string to generate an external squeezing index of the gas injection pipe, an internal pressure index of the gas injection pipe, and an axial tension index of the gas injection pipe, and to generate a residual strength index of the gas injection pipe string in combination with the use time, and then output a formula for the strength safety factor of the gas injection pipe, substitute the service time into the formula for the strength safety factor of the gas injection pipe to output the safety value of the gas injection pipe string, and output the safety evaluation of the gas injection pipe string.

Description

Technical Field

[0001] The present invention relates to the technical field of oil well exploitation, and is particularly concerned with a Method and device for optimizing oil recovery development plan. Background Art

[0002] There are two methods of oil recovery: natural drive and auxiliary drive. Natural drive means relying on the inherent pressure of the formation to push crude oil to the wellhead, such as natural gas drive, water drive, etc., while auxiliary drive means injecting other substances (such as water, gas, polymer, etc.) to increase the formation pressure and push the crude oil up. drive, The drive is a process that injects carbon dioxide ( ) into the reservoir to increase reservoir pressure and push crude oil or natural gas toward the production well. Before the injection, it is necessary to dig a gas injection string for injection. Entering the reservoir and increasing the pressure inside the reservoir, which helps to push crude oil or natural gas to the oil well, while increasing the effective driving force of the reservoir, making it easier to collect crude oil, and It can physically dissolve or chemically react with hydrocarbons in crude oil or natural gas, thereby changing its fluidity. The dissolution of hydrocarbons can reduce the viscosity of crude oil or natural gas, making it easier to flow, thereby increasing the recovery rate. The relative lightness and high fluidity of petroleum sulfide enable it to effectively replace oil and gas in crude oil or natural gas, thereby pushing crude oil or natural gas to move toward oil wells.

[0003] In use When injecting into the gas injection tube, Reacting with water or some minerals, it generates weak acid substances, which corrode the gas injection string. After a certain period of time, the gas injection string will be corroded and its strength will be reduced. At the same time, the gas injection string is squeezed by internal and external substances and is prone to deformation and damage, resulting in the gas injection string not being able to work normally. In order to reduce the risk and ensure normal operation, During oil recovery development, it is very important to judge the safety of the gas injection string.

[0004] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute the prior art that is already known to one of ordinary skill in the art. Summary of the invention

[0005] The object of the present invention is to provide a A method and device for optimizing an oil recovery development plan to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A sort of The optimization method of oil recovery development plan includes the following specific steps:

[0008] S1, collecting carbon dioxide gas injection string data A, pre-processing the gas injection string data A, and generating a gas injection pipe external extrusion index, wherein the gas injection pipe external extrusion index reflects the degree of external extrusion load of the gas injection pipe;

[0009] S2, collecting carbon dioxide gas injection string data B, pre-processing the gas injection string data B, and generating a gas injection pipe internal pressure index, wherein the gas injection pipe internal pressure index reflects the degree of pressure load inside the gas injection pipe;

[0010] S3, collecting carbon dioxide gas injection string data C, pre-processing the gas injection string data C, generating a gas injection pipe axial tension index, generating a gas injection pipe axial tension index, the gas injection pipe axial tension index reflects the degree of axial pressure load of the gas injection pipe;

[0011] S4, defining the use time of the gas injection string, collecting the yield strength data of the gas injection string, analyzing the use time of the gas injection string, and generating a residual strength index of the gas injection string, wherein the residual strength index of the gas injection string reflects the remaining use strength index of the gas injection string after being corroded;

[0012] S5. Set a threshold value, analyze the threshold value, the residual strength index of the gas injection pipe string, the external extrusion index of the gas injection pipe, the internal pressure index of the gas injection pipe, and the axial tension index of the gas injection pipe, and generate a formula for the strength safety factor of the gas injection pipe, which reflects the conditions that need to be met for the gas injection pipe to be safely used;

[0013] S6. Collect the service time of the gas injection string, input the service time of the gas injection string into the formula of the gas injection pipe strength safety factor, output the safety value, compare the safety value with the threshold value, and output whether the gas injection string is safe.

[0014] Furthermore, in S1, the gas injection string data A includes the wellhead casing pressure , dynamic liquid level , Depth of measuring point , perform correlation analysis on the gas injection string data A and generate the gas injection pipe external squeeze index , the formula based on is:

[0015] ;

[0016] in, is the liquid density outside the gas injection column, and the external squeeze index of the gas injection column It reflects the degree of external extrusion load on the gas injection pipe.

[0017] Furthermore, the gas injection string data B is the equivalent density of the formation fracture pressure , for the gas injection string data B and the depth of the measuring point Perform correlation analysis to generate the internal pressure index of the gas injection tube , the formula based on is:

[0018] ;

[0019] Among them, the internal pressure index of the gas injection pipe is It reflects the degree of pressure load inside the gas injection pipe.

[0020] Furthermore, the gas injection string data C includes the weight of each string segment. , Design inner diameter of gas injection string , Design outer diameter of gas injection string , perform correlation analysis on the gas injection string data C to generate the gas injection pipe axial tension index , the formula based on is: ;

[0021] Where H is the depth of the gas injection string, is the depth of the measuring point, is the gravitational acceleration, the axial tension index of the gas injection tube It reflects the degree of axial pressure load on the gas injection pipe.

[0022] Furthermore, the use time of the gas injection string includes the use time of the external compression of the gas injection string. , Gas injection string internal pressure use time , Axial tension of gas injection string usage time The yield strength data of the gas injection string is It indicates that the use time of the gas injection string is analyzed by the back wall theory and the Lame equation to generate the residual strength index of the gas injection string. The formula is:

[0023] ;

[0024] in, is the residual strength index of the gas injection string against external pressure, is the residual strength index of the gas injection string against internal pressure, is the residual tensile strength index of the gas injection string, is the corrosion rate of the gas injection string.

[0025] Furthermore, a threshold is set, wherein the threshold includes a safety threshold for the gas injection string to resist external pressure. , Safety threshold of gas injection string against internal pressure , Safety threshold of tensile strength of gas injection string ,The residual strength index of the gas injection pipe string, the external extrusion index of the gas injection pipe, the internal pressure index of the gas injection pipe, the axial tension index of the gas injection pipe and the threshold are analyzed to generate the formula of the gas injection pipe strength safety factor: .

[0026] Furthermore, the gas injection string has a safety threshold value for resisting external pressure. is 1.05, the safety threshold of the gas injection string against internal pressure is 1, the tensile safety threshold of the gas injection string is 1.6, collect the service time t of the gas injection string, and use t as , , Substitute in sequence , , , and output the safety value in sequence , , , the safety value , , Respectively Compare, if all three items meet , , then the output gas injection string is safe, otherwise the output gas injection string is unsafe.

[0027] The present invention also provides a Oil recovery development plan optimization device, used to perform a Oil recovery development plan optimization method, including:

[0028] A data acquisition module A, wherein the data acquisition module A is used to collect gas injection string data A;

[0029] A data acquisition module B, wherein the data acquisition module B is used to collect gas injection string data B;

[0030] A data acquisition module C, wherein the data acquisition module C is used to collect gas injection string data C;

[0031] A definition module, the definition module is used to define the use time of the gas injection string;

[0032] A yield strength collection module, wherein the yield strength collection module is used to collect the yield strength of the gas injection string;

[0033] A service time collection module, which is used to collect the service time of the gas injection string;

[0034] A data analysis module A, which is used to pre-process the gas injection pipe string data A and generate a gas injection pipe external extrusion index;

[0035] A data analysis module B, which is used to pre-process the gas injection pipe string data B and generate a gas injection pipe internal pressure index;

[0036] A data analysis module C, which is used to pre-process the gas injection pipe string data C to generate an axial tension index of the gas injection pipe;

[0037] A first data analysis module, the first data analysis module is used to analyze the use time of the gas injection string and generate a residual strength index of the gas injection string;

[0038] A second data analysis module, which is used to analyze the threshold, the residual strength index of the gas injection pipe string, the external extrusion index of the gas injection pipe, the internal pressure index of the gas injection pipe, and the axial tension index of the gas injection pipe, generate a gas injection pipe strength safety factor formula, input the gas injection pipe string service time into the gas injection pipe strength safety factor formula, and output a safety value;

[0039] A comparison module is used to compare the safety value with the threshold value and output whether the gas injection string is safe.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] The present invention firstly The gas injection string used in oil recovery development is analyzed to evaluate whether the gas injection string is safe, effectively reducing the probability of deformation or damage risk of the gas injection string. Specifically, the correlation analysis is performed on the gas injection pressure inside the gas injection string, the external oil pressure, the buoyancy of the gas injection string itself, and the axial tension generated by gravity. The external extrusion index of the gas injection pipe, the internal pressure index of the gas injection pipe, and the axial tension index of the gas injection pipe are generated. The residual strength index of the gas injection pipe is generated in combination with the use time, and then the formula for the safety factor of the gas injection pipe strength is output. The service time is substituted into the formula for the safety factor of the gas injection pipe strength to output the safety value of the gas injection string, and the safety evaluation of the gas injection string is output according to the comparison between the safety value and the threshold value, which can effectively reduce Engineering risks caused by deformation or damage of the gas injection pipe during oil recovery development. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the overall method flow of the present invention;

[0043] Figure 2 It is a schematic diagram of the overall device system flow of the present invention. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0045] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0046] Example:

[0047] See also Figure 1 , the present invention provides a technical solution:

[0048] A sort of Optimization method of oil recovery development plan, The drive is a process that injects carbon dioxide ( ) into the reservoir to increase reservoir pressure and push crude oil or natural gas toward the production well. Before the injection, it is necessary to dig a gas injection string for injection. Entering the reservoir and increasing the pressure inside the reservoir, which helps to push crude oil or natural gas to the oil well, while increasing the effective driving force of the reservoir, making it easier to collect crude oil, and It can physically dissolve or chemically react with hydrocarbons in crude oil or natural gas, thereby changing its fluidity. The dissolution of hydrocarbons can reduce the viscosity of crude oil or natural gas, making it easier to flow, thereby increasing the recovery rate. The relative lightness and high fluidity of slurry enable it to effectively replace the oil and gas in crude oil or natural gas, thereby pushing the crude oil or natural gas to move to the oil well. When injecting into the gas injection tube, It reacts with water or some minerals to generate weak acid substances, which corrode the gas injection pipe. After a certain period of time, the gas injection pipe will be corroded and its strength will be reduced, which may cause deformation and damage. Whether the gas injection string is safe for oil recovery development and whether the gas injection string needs to be replaced, the specific steps of the present invention include:

[0049] Step 1: Collecting carbon dioxide gas injection string data A, preprocessing the gas injection string data A, and generating a gas injection pipe external squeeze index, wherein the gas injection pipe external squeeze index reflects the degree of the gas injection pipe external squeeze load;

[0050] The gas injection string data A includes the wellhead casing pressure , dynamic liquid level , Depth of measuring point , perform correlation analysis on the gas injection string data A and generate the gas injection pipe external squeeze index , the formula based on is:

[0051] ;

[0052] in, is the liquid density outside the gas injection column, and the external squeeze index of the gas injection column It reflects the degree of external extrusion load of the gas injection pipe;

[0053] The casing pressure at the wellhead can be measured by draining the liquid at the wellhead of the gas injection string, then installing a pressure gauge or pressure sensor on the wellhead of the gas injection string, and then reading the casing pressure value after waiting for a certain period of time; during normal production, there is an oil level in the annular space between the tubing and the casing, and this oil level is called the dynamic liquid level. The dynamic liquid level height is expressed as the depth calculated from the oil wellhead, and the depth of the measuring point is the depth calculated from the wellhead of the gas injection string. The depth of the measuring point is the depth calculated from the wellhead of the gas injection string. There can be multiple collection points.

[0054] Step 2: Collect carbon dioxide gas injection string data B, pre-process the gas injection string data B, and generate an injection pipe internal pressure index, wherein the injection pipe internal pressure index reflects the degree of pressure load inside the injection pipe;

[0055] The gas injection string data B is the equivalent density of the formation fracture pressure , formation fracture pressure equivalent density The calculation method includes the following steps: determining the formation pressure P1, determining the hydrostatic pressure P2; calculating the formation fracture pressure equivalent density , the formula based on is: , for the gas injection string data B and the depth of the measuring point Perform correlation analysis to generate the internal pressure index of the gas injection tube , the formula based on is:

[0056] ;

[0057] Among them, the internal pressure index of the gas injection pipe is It reflects the degree of pressure load inside the gas injection pipe.

[0058] When injecting carbon dioxide, the gas injection string is subjected to the gas injection pressure. To ensure that the formation is not fractured, the maximum pressure at the bottom of the gas injection string is required to be less than 90% of the formation fracture pressure.

[0059] Step 3: Collect carbon dioxide gas injection string data C, pre-process the gas injection string data C, generate an injection pipe axial tension index, and generate an injection pipe axial tension index, wherein the injection pipe axial tension index reflects the degree of axial pressure load on the injection pipe;

[0060] The gas injection string self-weight and buoyancy generate axial tension. The gas injection string data C includes the weight of each string segment. , Design inner diameter of gas injection string , Design outer diameter of gas injection string , perform correlation analysis on the gas injection string data C to generate the gas injection pipe axial tension index , the formula based on is: ;

[0061] Where H is the depth of the gas injection string, is the depth of the measuring point, is the gravitational acceleration, the axial tension index of the gas injection tube It reflects the degree of axial pressure load on the gas injection pipe.

[0062] Step 4: define the use time of the gas injection string, collect the yield strength data of the gas injection string, analyze the use time of the gas injection string, and generate the residual strength index of the gas injection string, wherein the residual strength index of the gas injection string reflects the remaining use strength index of the gas injection string after being corroded;

[0063] The use time of the gas injection string includes the external extrusion use time of the gas injection string , Gas injection string internal pressure use time , Axial tension of gas injection string usage time The yield strength data of the gas injection string is It indicates that the use time of the gas injection string is analyzed by the back wall theory and the Lame equation to generate the residual strength index of the gas injection string. The formula is:

[0064] ;

[0065] in, is the residual strength index of the gas injection string against external pressure, is the residual strength index of the gas injection string against internal pressure, is the residual tensile strength index of the gas injection string, is the corrosion rate of the gas injection string. The residual strength index of the gas injection string against external pressure indicates the remaining strength of the gas injection string under external pressure. The residual strength index of the gas injection string against internal pressure indicates the remaining strength of the gas injection string under internal pressure. The residual tensile strength index of the gas injection string indicates the remaining strength of the gas injection string under axial tension.

[0066] Step 5: Set a threshold value, analyze the threshold value, the residual strength index of the gas injection pipe string, the external extrusion index of the gas injection pipe, the internal pressure index of the gas injection pipe, and the axial tension index of the gas injection pipe, and generate a formula for the strength safety factor of the gas injection pipe. The formula for the strength safety factor of the gas injection pipe reflects the conditions that need to be met for the gas injection pipe to be safely used;

[0067] Set thresholds, including safety thresholds for the gas injection string to resist external pressure , Safety threshold of gas injection string against internal pressure , Safety threshold of tensile strength of gas injection string ,The residual strength index of the gas injection pipe string, the external extrusion index of the gas injection pipe, the internal pressure index of the gas injection pipe, the axial tension index of the gas injection pipe and the threshold are analyzed to generate the formula of the gas injection pipe strength safety factor: In the formula of the safety factor of the gas injection pipe strength, the independent variable gas injection pipe service time is substituted into it, and the gas injection pipe service time that meets the conditions is the safety time.

[0068] Step 6: Collect the service time of the gas injection string, input the service time of the gas injection string into the gas injection pipe strength safety factor formula, output the safety value, compare the safety value with the threshold, and output whether the gas injection string is safe.

[0069] The safety threshold of the gas injection string against external pressure is 1.05, the safety threshold of the gas injection string against internal pressure is 1, the tensile safety threshold of the gas injection string is 1.6, collect the service time t of the gas injection string, and use t as , , Substitute in sequence , , , and output the safety value in sequence , , , the safety value , , Respectively Compare, if all three items meet , , the output gas injection string is safe, otherwise the output gas injection string is unsafe and needs to be replaced.

[0070] Reference Figure 2 The present invention also provides a Oil recovery development plan optimization device, used to perform a Oil recovery development plan optimization method, including:

[0071] A data acquisition module A, wherein the data acquisition module A is used to collect gas injection string data A;

[0072] A data acquisition module B, wherein the data acquisition module B is used to collect gas injection string data B;

[0073] A data acquisition module C, wherein the data acquisition module C is used to collect gas injection string data C;

[0074] A definition module, the definition module is used to define the use time of the gas injection string;

[0075] A yield strength collection module, wherein the yield strength collection module is used to collect the yield strength of the gas injection string;

[0076] A service time collection module, which is used to collect the service time of the gas injection string;

[0077] A data analysis module A, which is used to pre-process the gas injection pipe string data A and generate a gas injection pipe external extrusion index;

[0078] A data analysis module B, which is used to pre-process the gas injection pipe string data B and generate a gas injection pipe internal pressure index;

[0079] A data analysis module C, which is used to pre-process the gas injection pipe string data C to generate an axial tension index of the gas injection pipe;

[0080] A first data analysis module, the first data analysis module is used to analyze the use time of the gas injection string and generate a residual strength index of the gas injection string;

[0081] A second data analysis module, which is used to analyze the threshold, the residual strength index of the gas injection pipe string, the external extrusion index of the gas injection pipe, the internal pressure index of the gas injection pipe, and the axial tension index of the gas injection pipe, generate a gas injection pipe strength safety factor formula, input the gas injection pipe string service time into the gas injection pipe strength safety factor formula, and output a safety value;

[0082] A comparison module is used to compare the safety value with the threshold value and output whether the gas injection string is safe.

[0083] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters in the formula are set by technicians in this field according to actual conditions.

[0084] The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination thereof. When implemented by software, the above embodiments may be implemented in whole or in part in the form of a computer program product. Those skilled in the art may appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein may be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software methods depends on the specific application and design constraints of the technical solution.

[0085] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, and may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0086] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A The oil recovery development program optimization method is characterized by: The specific steps include: S1, collecting carbon dioxide gas injection string data A, pre-processing the gas injection string data A, and generating a gas injection pipe external extrusion index, wherein the gas injection pipe external extrusion index reflects the degree of external extrusion load of the gas injection pipe; S2, collecting carbon dioxide gas injection string data B, pre-processing the gas injection string data B, and generating a gas injection pipe internal pressure index, wherein the gas injection pipe internal pressure index reflects the degree of pressure load inside the gas injection pipe; S3, collecting carbon dioxide gas injection string data C, pre-processing the gas injection string data C, and generating a gas injection pipe axial tension index, wherein the gas injection pipe axial tension index reflects the degree of axial pressure load of the gas injection pipe; S4, defining the use time of the gas injection string, collecting the yield strength data of the gas injection string, analyzing the use time of the gas injection string, and generating a residual strength index of the gas injection string, wherein the residual strength index of the gas injection string reflects the remaining use strength index of the gas injection string after being corroded; S5. Set a threshold value, analyze the threshold value, the residual strength index of the gas injection pipe string, the external extrusion index of the gas injection pipe, the internal pressure index of the gas injection pipe, and the axial tension index of the gas injection pipe, and generate a formula for the strength safety factor of the gas injection pipe, which reflects the conditions that need to be met for the gas injection pipe to be safely used; S6. Collect the service time of the gas injection string, input the service time of the gas injection string into the gas injection pipe strength safety factor formula, output the safety value, compare the safety value with the threshold value, and output whether the gas injection string is safe; In S1, the gas injection string data A includes the wellhead casing pressure , dynamic liquid level , Depth of measuring point , perform correlation analysis on the gas injection string data A to generate the gas injection pipe external squeeze index , the formula based on is: in, is the liquid density outside the gas injection column, and the external squeeze index of the gas injection column It reflects the degree of external extrusion load of the gas injection pipe; The gas injection string data B is the equivalent density of the formation fracture pressure , for the gas injection string data B and the depth of the measuring point Perform correlation analysis to generate the internal pressure index of the gas injection tube , the formula based on is: Among them, the internal pressure index of the gas injection pipe is It reflects the degree of pressure load inside the gas injection pipe; The gas injection string data C includes the weight of each string segment , Design inner diameter of gas injection string , Design outer diameter of gas injection string , perform correlation analysis on the gas injection string data C to generate the gas injection pipe axial tension index , the formula based on is: Where H is the depth of the gas injection string, is the depth of the measuring point, is the gravitational acceleration, the axial tension index of the gas injection tube It reflects the degree of axial pressure load on the gas injection pipe; The use time of the gas injection string includes the external extrusion use time of the gas injection string , Gas injection string internal pressure use time , Axial tension of gas injection string usage time The yield strength data of the gas injection string is It indicates that the use time of the gas injection string is analyzed by the back wall theory and the Lame equation to generate the residual strength index of the gas injection string. The formula is: in, is the residual strength index of the gas injection string against external pressure, is the residual strength index of the gas injection string against internal pressure, is the residual tensile strength index of the gas injection string, is the corrosion rate of the gas injection string.

2. A method according to claim 1 The oil recovery development program optimization method is characterized by: Set thresholds, including safety thresholds for the gas injection string to resist external pressure , Safety threshold of gas injection string against internal pressure , Safety threshold of tensile strength of gas injection string ,The residual strength index of the gas injection pipe string, the external extrusion index of the gas injection pipe, the internal pressure index of the gas injection pipe, the axial tension index of the gas injection pipe and the threshold are analyzed to generate the formula of the gas injection pipe strength safety factor: .

3. A method according to claim 2 The oil recovery development program optimization method is characterized by: The safety threshold of the gas injection string against external pressure is 1.05, the safety threshold of the gas injection string against internal pressure is 1, the tensile safety threshold of the gas injection string is 1.6, collect the service time t of the gas injection string, and use t as , , Substitute in sequence , , , and output the safety value in sequence , , , the safety value , , Respectively Compare, if all three items meet , , then the output gas injection string is safe, otherwise the output gas injection string is unsafe.

4. A The oil recovery development program optimization device is characterized by: A method for implementing any one of claims 1 to 3 Oil recovery development plan optimization method, including: A data acquisition module A, wherein the data acquisition module A is used to collect gas injection string data A; A data acquisition module B, wherein the data acquisition module B is used to collect gas injection string data B; A data acquisition module C, wherein the data acquisition module C is used to collect gas injection string data C; A definition module, the definition module is used to define the use time of the gas injection string; A yield strength collection module, wherein the yield strength collection module is used to collect the yield strength of the gas injection string; A service time collection module, which is used to collect the service time of the gas injection string; A data analysis module A, which is used to pre-process the gas injection pipe string data A and generate a gas injection pipe external extrusion index; A data analysis module B, which is used to pre-process the gas injection pipe string data B and generate a gas injection pipe internal pressure index; A data analysis module C, which is used to pre-process the gas injection pipe string data C to generate an axial tension index of the gas injection pipe; A first data analysis module, the first data analysis module is used to analyze the use time of the gas injection string and generate a residual strength index of the gas injection string; A second data analysis module, which is used to analyze the threshold, the residual strength index of the gas injection pipe string, the external extrusion index of the gas injection pipe, the internal pressure index of the gas injection pipe, and the axial tension index of the gas injection pipe, generate a gas injection pipe strength safety factor formula, input the gas injection pipe string service time into the gas injection pipe strength safety factor formula, and output a safety value; A comparison module is used to compare the safety value with the threshold value and output whether the gas injection string is safe.

Images