A method and device for determining corrosion rate of oil and gas process pipeline

Abstract

The embodiment of the present invention provides a method and device for determining the corrosion rate of an oil and gas process pipeline, the method comprising: determining an internal corrosion reference rate and an external corrosion reference rate corresponding to the oil and gas process pipeline; determining an internal corrosion rate correction factor and an external corrosion rate correction factor corresponding to the oil and gas process pipeline; determining the internal corrosion rate corresponding to the oil and gas process pipeline according to the internal corrosion reference rate and the internal corrosion rate correction factor; determining the external corrosion rate corresponding to the oil and gas process pipeline according to the external corrosion reference rate and the external corrosion rate correction factor. The embodiment of the present invention can quickly determine the internal and external corrosion rates of the process pipeline according to the internal and external corrosion reference rates of the oil and gas process pipeline and the internal and external corrosion correction factors of the oil and gas process pipeline, thereby providing a basis for the inspection and maintenance of the process pipeline in the station.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas pipeline safety, and in particular to a method and device for determining the corrosion rate of an oil and gas process pipeline. Background Art

[0002] Compared with the single linear structure of long-distance pipelines, the process pipelines in oil and gas stations have complex operating conditions, different functions, different specifications, various laying methods, and many pipeline components. Due to the complexity of the station process pipelines, they are more susceptible to damage from internal and external corrosion. Under the combined effects of factors such as internal and external corrosion of the pipeline and environmental changes, the process pipelines will suffer corrosion failure to varying degrees. Corrosion has become the main cause of failure of process pipelines in stations.

[0003] At present, the corrosion rate of process pipelines is mostly calculated based on local detection results. Due to the incompleteness of random inspections and the uncertainty of locations, the corrosion rate of most process pipelines cannot be obtained, resulting in most process pipelines being unable to be repaired in a timely and effective manner. Therefore, a method for determining the corrosion rate of oil and gas process pipelines is urgently needed to provide an important basis for their detection and maintenance, and to ensure the safe and effective operation of process pipelines within the station. Summary of the invention

[0004] In view of the problems in the prior art, an embodiment of the present invention provides a method and device for determining the corrosion rate of an oil and gas process pipeline.

[0005] In a first aspect, an embodiment of the present invention provides a method for determining the corrosion rate of an oil and gas process pipeline, comprising:

[0006] Determine the internal corrosion benchmark rate and external corrosion benchmark rate corresponding to the oil and gas process pipeline;

[0007] Determine the internal corrosion rate correction factor and external corrosion rate correction factor corresponding to the oil and gas process pipeline;

[0008] Determining the internal corrosion rate corresponding to the oil and gas process pipeline according to the internal corrosion reference rate and the internal corrosion rate correction factor;

[0009] The external corrosion rate corresponding to the oil and gas process pipeline is determined according to the external corrosion reference rate and the external corrosion rate correction factor.

[0010] Furthermore, the determination of the internal corrosion rate correction factor and the external corrosion rate correction factor corresponding to the oil and gas process pipeline specifically includes:

[0011] According to the fault tree analysis, the dynamic damage events of internal and external corrosion of oil and gas process pipelines are obtained, and the correction factors for internal corrosion rate are determined, including: water deposition condition correction factor, product fluidity correction factor, medium flow rate correction factor and pipeline structure correction factor. The correction factors for external corrosion rate include: soil resistivity correction factor, cathodic protection correction factor, anti-corrosion layer condition correction factor, coating age correction factor, laying condition correction factor and surrounding climate correction factor;

[0012] The pipeline condition information of the oil and gas process pipeline is input into the preset correction factor matching model, and the values ​​of the water deposition condition correction factor, the product fluidity correction factor, the medium flow rate correction factor, the pipeline structure correction factor, the soil resistivity correction factor, the cathodic protection correction factor, the anti-corrosion layer condition correction factor, the coating age correction factor, the laying condition correction factor and the surrounding climate correction factor corresponding to the oil and gas process pipeline are output.

[0013] Further, the determining of the internal corrosion rate corresponding to the oil and gas process pipeline according to the internal corrosion reference rate and the internal corrosion rate correction factor specifically includes:

[0014] Determine the internal corrosion rate of the oil and gas process pipeline according to the first relationship model below:

[0015] r 内 =r 内基 *AF 水沉积状况 *AF 产品流动性 *AF 介质流速 *AF 管道结构

[0016] Among them, r 内 is the internal corrosion rate of the oil and gas process pipeline, r 内基 is the internal corrosion benchmark rate corresponding to the oil and gas process pipeline, AF 水沉积状况 is the value of the water deposition correction factor corresponding to the oil and gas process pipeline, AF 产品流动性 is the value of the product fluidity correction factor corresponding to the oil and gas process pipeline, AF 介质流速 is the value of the medium velocity correction factor corresponding to the oil and gas process pipeline, AF 管道结构 It is the value of the pipeline structure correction factor corresponding to the oil and gas process pipeline.

[0017] Further, the determining of the external corrosion rate corresponding to the oil and gas process pipeline according to the external corrosion reference rate and the external corrosion rate correction factor specifically includes:

[0018] Determine the external corrosion rate corresponding to the oil and gas process pipeline according to the following second relationship model:

[0019] r外 =r 外基 *AF 土壤电阻率 *AF 阴极保护 *AF 防腐层状况 *AF 涂层年限 *AF 敷设状况 *AF 周边气候

[0020] Among them, r 外 is the external corrosion rate corresponding to the oil and gas process pipeline, r 外基 is the external corrosion benchmark rate corresponding to the oil and gas process pipeline, AF 土壤电阻率 is the value of the soil resistivity correction factor corresponding to the oil and gas process pipeline, AF 阴极保护 is the value of the cathodic protection correction factor corresponding to the oil and gas process pipeline, AF 防腐层状况 is the value of the anti-corrosion layer condition correction factor corresponding to the oil and gas process pipeline, AF 涂层年限 AF is the value of the coating life correction factor corresponding to the oil and gas process pipeline. 敷设状况 AF is the value of the correction factor for the installation condition of the oil and gas process pipeline. 周边气候 It is the value of the surrounding climate correction factor corresponding to the oil and gas process pipeline.

[0021] In a second aspect, an embodiment of the present invention further provides a device for determining the corrosion rate of an oil and gas process pipeline, comprising:

[0022] The first determination module is used to determine the internal corrosion reference rate and the external corrosion reference rate corresponding to the oil and gas process pipeline;

[0023] The second determination module is used to determine the internal corrosion rate correction factor and the external corrosion rate correction factor corresponding to the oil and gas process pipeline;

[0024] A third determination module is used to determine the internal corrosion rate corresponding to the oil and gas process pipeline according to the internal corrosion reference rate and the internal corrosion rate correction factor;

[0025] The fourth determination module is used to determine the external corrosion rate corresponding to the oil and gas process pipeline according to the external corrosion reference rate and the external corrosion rate correction factor.

[0026] Furthermore, the second determining module includes:

[0027] The first determination unit is used to obtain the dynamic damage events of internal and external corrosion of oil and gas process pipelines according to the fault tree analysis, and determine the correction factors of internal corrosion rate, including: water deposition condition correction factor, product fluidity correction factor, medium flow rate correction factor and pipeline structure correction factor; the correction factors of external corrosion rate include: soil resistivity correction factor, cathodic protection correction factor, anti-corrosion layer condition correction factor, coating age correction factor, laying condition correction factor and surrounding climate correction factor;

[0028] The second determination unit is used to input the pipeline condition information of the oil and gas process pipeline into a preset correction factor matching model, and output the value of the water deposition condition correction factor corresponding to the oil and gas process pipeline, the value of the product fluidity correction factor, the value of the medium flow rate correction factor, the value of the pipeline structure correction factor, the value of the soil resistivity correction factor, the value of the cathodic protection correction factor, the value of the anti-corrosion layer condition correction factor, the value of the coating age correction factor, the value of the laying condition correction factor and the value of the surrounding climate correction factor.

[0029] Furthermore, the third determination module is specifically configured to:

[0030] Determine the internal corrosion rate of the oil and gas process pipeline according to the first relationship model below:

[0031] r 内 =r 内基 *AF 水沉积状况 *AF 产品流动性 *AF 介质流速 *AF 管道结构

[0032] Among them, r 内 is the internal corrosion rate of the oil and gas process pipeline, r 内基 is the internal corrosion benchmark rate corresponding to the oil and gas process pipeline, AF 水沉积状况 is the value of the water deposition correction factor corresponding to the oil and gas process pipeline, AF 产品流动性 is the value of the product fluidity correction factor corresponding to the oil and gas process pipeline, AF 介质流速 is the value of the medium velocity correction factor corresponding to the oil and gas process pipeline, AF 管道结构 It is the value of the pipeline structure correction factor corresponding to the oil and gas process pipeline.

[0033] Furthermore, the fourth determining module is specifically configured to:

[0034] Determine the external corrosion rate corresponding to the oil and gas process pipeline according to the following second relationship model:

[0035] r 外 =r 外基 *AF 土壤电阻率 *AF 阴极保护*AF 防腐层状况 *AF 涂层年限 *AF 敷设状况 *AF 周边气候

[0036] Among them, r 外 is the external corrosion rate corresponding to the oil and gas process pipeline, r 外基 is the external corrosion benchmark rate corresponding to the oil and gas process pipeline, AF 土壤电阻率 is the value of the soil resistivity correction factor corresponding to the oil and gas process pipeline, AF 阴极保护 is the value of the cathodic protection correction factor corresponding to the oil and gas process pipeline, AF 防腐层状况 is the value of the anti-corrosion layer condition correction factor corresponding to the oil and gas process pipeline, AF 涂层年限 AF is the value of the coating life correction factor corresponding to the oil and gas process pipeline. 敷设状况 AF is the value of the correction factor for the installation condition of the oil and gas process pipeline. 周边气候 It is the value of the surrounding climate correction factor corresponding to the oil and gas process pipeline.

[0037] In a third aspect, an embodiment of the present invention further provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the method for determining the corrosion rate of an oil and gas process pipeline as described in the first aspect are implemented.

[0038] In a fourth aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method for determining the corrosion rate of an oil and gas process pipeline as described in the first aspect.

[0039] It can be seen from the above technical scheme that the method and device for determining the corrosion rate of the oil and gas process pipeline provided in the embodiment of the present invention can quickly determine the internal and external corrosion rates of the process pipeline according to the internal and external corrosion reference rates of the oil and gas process pipeline and the internal and external corrosion correction factors of the oil and gas process pipeline, thereby providing a basis for the inspection and maintenance of the process pipeline in the station. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A flow chart of a method for determining the corrosion rate of an oil and gas process pipeline provided in one embodiment of the present invention;

[0042] Figure 2 It is a schematic diagram of the implementation principle of a method for determining the corrosion rate of an oil and gas process pipeline provided by an embodiment of the present invention;

[0043] Figure 3 A schematic diagram of the structure of a device for determining the corrosion rate of an oil and gas process pipeline provided by an embodiment of the present invention;

[0044] Figure 4 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution 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 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 are within the scope of protection of the present invention.

[0046] Figure 1 The flowchart of the method for determining the corrosion rate of oil and gas process pipelines provided by an embodiment of the present invention is shown. Figure 1 As shown, the method for determining the corrosion rate of an oil and gas process pipeline provided by an embodiment of the present invention includes the following steps:

[0047] Step 101: Determine an internal corrosion benchmark rate and an external corrosion benchmark rate corresponding to an oil and gas process pipeline.

[0048] In this step, the internal and external corrosion benchmark rate table is queried according to the process pipeline type corresponding to the oil and gas process pipeline to determine the corresponding internal corrosion benchmark rate and external corrosion benchmark rate. For example, assuming that the process pipeline type corresponding to the oil and gas process pipeline is type A, the internal and external corrosion benchmark rate table is queried according to type A to obtain the corresponding internal corrosion benchmark rate and external corrosion benchmark rate, which are r 内基 5.08×10 -2 mm / year,r 外基 1.27×10 -1 mm / year.

[0049] In this step, it should be noted that the internal and external corrosion reference rate table contains a correspondence between the process pipeline type and the internal corrosion reference rate and the external corrosion reference rate.

[0050] Step 102: Determine the internal corrosion rate correction factor and the external corrosion rate correction factor corresponding to the oil and gas process pipeline.

[0051] In this step, when determining the internal corrosion rate correction factor and external corrosion rate correction factor corresponding to the oil and gas process pipeline, the following processing methods can be used:

[0052] A. Based on the fault tree analysis, the dynamic damage events of internal and external corrosion of oil and gas process pipelines are obtained. The correction factors for internal corrosion rate include: water deposition condition correction factor, product fluidity correction factor, medium flow rate correction factor and pipeline structure correction factor. The correction factors for external corrosion rate include: soil resistivity correction factor, cathodic protection correction factor, anti-corrosion layer condition correction factor, coating age correction factor, laying condition correction factor and surrounding climate correction factor.

[0053] In this step, the correction factor affecting the internal corrosion rate of the pipeline and the correction factor affecting the external corrosion rate of the pipeline are determined by the fault tree analysis method according to the historical fault data of the oil and gas process pipeline. It should be noted that the correction factor affecting the internal corrosion rate of the pipeline and the correction factor affecting the external corrosion rate of the pipeline are determined by the fault tree analysis method according to the historical fault data of the oil and gas process pipeline, which can obtain a more comprehensive main influencing factor affecting the internal and external corrosion of the oil and gas process pipeline, so that the subsequent determination of the internal and external corrosion rates can be more accurate.

[0054] B. Input the pipeline condition information of the oil and gas process pipeline into the preset correction factor matching model, and output the values ​​of the water deposition condition correction factor, product fluidity correction factor, medium flow rate correction factor, pipeline structure correction factor, soil resistivity correction factor, cathodic protection correction factor, anti-corrosion layer condition correction factor, coating life correction factor, laying condition correction factor and surrounding climate correction factor corresponding to the oil and gas process pipeline.

[0055] In this step, it should be noted that the pipeline status information includes: water deposition status of the pipeline (for example, whether there is water deposition), pipeline blind pipe section status (for example, whether there is a blind pipe section), pipeline medium flow rate (for example, medium flow rate>3m / s, or ≤3m / s), pipeline structure (for example, the pipeline has elbows, reducers, tees, etc. and is located at the outlet of the pump, the pipeline has elbows, reducers, tees, etc. and is located at the inlet of the pump, the pipeline has elbows, reducers, tees, etc. but the pipeline pressure and flow fluctuate steadily, the pipeline does not have elbows, reducers, tees, etc.), pipeline resistivity (for example, resistivity <500Ω·cm, 500~<1000, 1000~<2000, 2000~<10 000, ≥10000, etc.), pipeline cathodic protection (for example: no cathodic protection, not measured, minimum cathodic polarization value <100mV, minimum cathodic polarization value ≥100mV), pipeline anti-corrosion layer condition (for example, no external anti-corrosion layer or casing, external anti-corrosion layer or casing but damaged, external anti-corrosion layer or casing, external anti-corrosion layer or casing), pipeline coating age (for example: > pipeline maintenance cycle, 5 years ~ pipeline maintenance cycle, <5 years), pipeline laying condition (for example: there is an underground section, there is no underground section), temperature and climate around the pipeline (for example: annual average temperature >16.1℃ and mild / humid climate, annual average temperature >16.1℃ and arid / dry climate, etc.).

[0056] In this step, it should be noted that the preset correction factor matching model stores the corresponding relationship between pipeline condition information and the values ​​of water deposition condition correction factor, product fluidity correction factor, medium flow rate correction factor, pipeline structure correction factor, soil resistivity correction factor, cathodic protection correction factor, anti-corrosion layer condition correction factor, coating age correction factor, installation condition correction factor and surrounding climate correction factor. The preset correction factor matching model can be found in the contents shown in Tables 1 to 10. In actual use, Tables 1 to 10 can be combined into one table.

[0057] In this step, it should be noted that the preset correction factor matching model is established based on a large amount of actual detection data for oil and gas process pipelines, that is, the specific values ​​of each correction factor corresponding to the pipeline conditions are determined by a large amount of actual detection data, that is, in the process of establishing the preset correction factor matching model, it is necessary to continuously adjust the value of the correction factor, and verify it according to the internal and external corrosion rate results calculated by the oil and gas process pipeline corrosion rate determination method provided by this embodiment, so that the internal and external corrosion rate results calculated by the oil and gas process pipeline corrosion rate determination method provided by this embodiment are consistent with the internal and external corrosion rate results in the actual detection data, and then determine the final values ​​of each correction factor on the basis of satisfying the consistency between the calculation results and the actual detection data, and then establish the preset correction factor matching model.

[0058] Table 1 Water deposition correction factor (AF 水沉积状况 ):

[0059] Water deposition conditions Correction factor for water deposition conditions Water deposition 5 Anhydrous deposition 0.5

[0060] Table 2 Product Liquidity Correction Factor (AF 产品流动性 ):

[0061] Blind pipe condition Product Liquidity Correction Factor There is a blind pipe 5 No blind pipe 0.5

[0062] Table 3 Medium velocity correction factor (AF 介质流速 ):

[0063] Medium flow rate Medium velocity correction factor >3m / s 2 ≤3m / s 1

[0064] Table 4 Pipeline structure correction factor (AF 管道结构 ):

[0065] Pipeline structure Pipeline structure correction factor There are elbows, reducers, tees, etc. and they are located at the outlet of the pump 3 There are elbows, reducers, tees, etc. and they are located at the inlet end of the pump 1.5 There are elbows, reducers, tees, etc., but the pipeline pressure and flow fluctuate steadily 1 There are no elbows, reducers, tees, etc. 0.8

[0066] Table 5 Soil resistivity correction factor (AF 土壤电阻率 ):

[0067]

[0068] Table 6 Cathodic protection correction factor (AF 阴极保护 ):

[0069] Cathodic protection Cathodic protection correction factor No Yin protection 1.33 Not measured 1.00 Minimum cathode polarization value <100mV 0.66 Minimum cathode polarization value ≥ 100mV 0.33

[0070] Table 7 Anti-corrosion layer condition correction factor (AF 防腐层状况 ):

[0071] Anti-corrosion layer condition Correction factor for corrosion protection layer condition No external corrosion protection layer or casing 2.00 There is an outer anti-corrosion layer or casing, but it is damaged 1.50 With external anti-corrosion layer or casing 1.00

[0072] Table 8 Coating life correction factor (AF 涂层年限 ):

[0073] Coating life Coating life correction factor >Pipeline maintenance cycle 2.00 5 years ~ Pipeline maintenance cycle 0.80 <5 years 0.50

[0074] Table 9 Laying Condition Correction Factor (AF 敷设状况 ):

[0075] Laying status Laying Condition Correction Factor There is an entry and exit section 5.00 There is no entry and exit section 0.50

[0076] Table 10 Ambient climate correction factor (AF 周边气候 ):

[0077]

[0078] In this step, based on the preset correction factor matching model as shown in Tables 1 to 10, it is only necessary to input the obtained pipeline condition information of the oil and gas process pipeline into the preset correction factor matching model, and the values ​​of the water deposition condition correction factor corresponding to the oil and gas process pipeline, the product fluidity correction factor, the medium flow rate correction factor, the pipeline structure correction factor, the soil resistivity correction factor, the cathodic protection correction factor, the anti-corrosion layer condition correction factor, the coating age correction factor, the laying condition correction factor and the surrounding climate correction factor can be output. For example, the water deposition condition of the pipeline can be input as waterless deposition into the model shown in Table 1, and the corresponding water deposition condition correction factor value is 0.5. Similarly, for other correction factors, all can be obtained in the same way.

[0079] Step 103: Determine the internal corrosion rate corresponding to the oil and gas process pipeline according to the internal corrosion reference rate and the internal corrosion rate correction factor.

[0080] In this step, the internal corrosion rate corresponding to the oil and gas process pipeline can be determined according to the following first relationship model:

[0081] r 内 =r 内基 *AF 水沉积状况 *AF 产品流动性 *AF 介质流速 *AF 管道结构

[0082] Among them, r 内 is the internal corrosion rate of the oil and gas process pipeline, r 内基 is the internal corrosion benchmark rate corresponding to the oil and gas process pipeline, AF 水沉积状况 is the value of the water deposition correction factor corresponding to the oil and gas process pipeline, AF 产品流动性 is the value of the product fluidity correction factor corresponding to the oil and gas process pipeline, AF 介质流速 is the value of the medium velocity correction factor corresponding to the oil and gas process pipeline, AF 管道结构It is the value of the pipeline structure correction factor corresponding to the oil and gas process pipeline.

[0083] Step 104: Determine the external corrosion rate corresponding to the oil and gas process pipeline according to the external corrosion reference rate and the external corrosion rate correction factor.

[0084] In this step, the external corrosion rate corresponding to the oil and gas process pipeline can be determined according to the following second relationship model:

[0085] r 外 =r 外基 *AF 土壤电阻率 *AF 阴极保护 *AF 防腐层状况 *AF 涂层年限 *AF 敷设状况 *AF 周边气候

[0086] Among them, r 外 is the external corrosion rate corresponding to the oil and gas process pipeline, r 外基 is the external corrosion benchmark rate corresponding to the oil and gas process pipeline, AF 土壤电阻率 is the value of the soil resistivity correction factor corresponding to the oil and gas process pipeline, AF 阴极保护 is the value of the cathodic protection correction factor corresponding to the oil and gas process pipeline, AF 防腐层状况 is the value of the anti-corrosion layer condition correction factor corresponding to the oil and gas process pipeline, AF 涂层年限 AF is the value of the coating life correction factor corresponding to the oil and gas process pipeline. 敷设状况 AF is the value of the correction factor for the installation condition of the oil and gas process pipeline. 周边气候 It is the value of the surrounding climate correction factor corresponding to the oil and gas process pipeline.

[0087] It can be seen from the above technical solution that the oil and gas process pipeline corrosion rate determination method provided by the embodiment of the present invention can quickly determine the internal and external corrosion rates of the process pipeline according to the internal and external corrosion reference rates of the oil and gas process pipeline and the internal and external corrosion correction factors of the oil and gas process pipeline, thereby providing a basis for the inspection and maintenance of the process pipeline in the station. In addition, in this embodiment, since each correction factor comprehensively includes the main influencing factors of the internal and external corrosion of the process pipeline, the internal and external corrosion rates can be determined more accurately.

[0088] Based on the content of the above embodiment, in this embodiment, the above step 102 can be implemented in the following manner:

[0089] According to the fault tree analysis, the dynamic damage events of internal and external corrosion of oil and gas process pipelines are obtained, and the correction factors for internal corrosion rate are determined, including: water deposition condition correction factor, product fluidity correction factor, medium flow rate correction factor and pipeline structure correction factor. The correction factors for external corrosion rate include: soil resistivity correction factor, cathodic protection correction factor, anti-corrosion layer condition correction factor, coating age correction factor, laying condition correction factor and surrounding climate correction factor;

[0090] The pipeline condition information of the oil and gas process pipeline is input into the preset correction factor matching model, and the values ​​of the water deposition condition correction factor, the product fluidity correction factor, the medium flow rate correction factor, the pipeline structure correction factor, the soil resistivity correction factor, the cathodic protection correction factor, the anti-corrosion layer condition correction factor, the coating age correction factor, the laying condition correction factor and the surrounding climate correction factor corresponding to the oil and gas process pipeline are output.

[0091] In this embodiment, since the correction factors determined by the fault tree analysis method comprehensively include the main influencing factors of internal and external corrosion of the process pipeline, the internal corrosion rate corresponding to the oil and gas process pipeline is determined according to the internal corrosion reference rate and the internal corrosion rate correction factor, and the external corrosion rate corresponding to the oil and gas process pipeline is determined according to the external corrosion reference rate and the external corrosion rate correction factor. The internal and external corrosion rates can be determined more accurately.

[0092] Based on the content of the above embodiment, in this embodiment, the above step 103 can be implemented in the following manner:

[0093] Determine the internal corrosion rate of the oil and gas process pipeline according to the first relationship model below:

[0094] r 内 =r 内基 *AF 水沉积状况 *AF 产品流动性 *AF 介质流速 *AF 管道结构

[0095] Among them, r 内 is the internal corrosion rate of the oil and gas process pipeline, r 内基 is the internal corrosion benchmark rate corresponding to the oil and gas process pipeline, AF 水沉积状况 is the value of the water deposition correction factor corresponding to the oil and gas process pipeline, AF 产品流动性 is the value of the product fluidity correction factor corresponding to the oil and gas process pipeline, AF 介质流速 is the value of the medium velocity correction factor corresponding to the oil and gas process pipeline, AF 管道结构 It is the value of the pipeline structure correction factor corresponding to the oil and gas process pipeline.

[0096] In this embodiment, the internal corrosion rates of different process pipelines can be quickly determined through the internal corrosion baseline rate of the oil and gas process pipeline and the internal corrosion correction factor based on the fault tree, which provides a basis for the inspection and maintenance of the process pipelines in the station. Since each correction factor comprehensively includes the main influencing factors of the internal corrosion of the process pipeline, the internal corrosion rate can be determined more accurately.

[0097] It should be noted that the method for determining the corrosion rate of the oil and gas process pipeline provided in this embodiment, combined with the fault tree analysis, determines the internal and external corrosion factors of the process pipeline, obtains the risk-based theoretical corrosion rate, and provides a basis for the inspection and maintenance of the process pipeline.

[0098] Based on the content of the above embodiment, in this embodiment, the above step 104 can be implemented in the following manner:

[0099] Determine the external corrosion rate corresponding to the oil and gas process pipeline according to the following second relationship model:

[0100] r 外 =r 外基 *AF 土壤电阻率 *AF 阴极保护 *AF 防腐层状况 *AF 涂层年限 *AF 敷设状况 *AF 周边气候

[0101] Among them, r 外 is the external corrosion rate corresponding to the oil and gas process pipeline, r 外基 is the external corrosion benchmark rate corresponding to the oil and gas process pipeline, AF 土壤电阻率 is the value of the soil resistivity correction factor corresponding to the oil and gas process pipeline, AF 阴极保护 is the value of the cathodic protection correction factor corresponding to the oil and gas process pipeline, AF 防腐层状况 is the value of the anti-corrosion layer condition correction factor corresponding to the oil and gas process pipeline, AF 涂层年限 AF is the value of the coating life correction factor corresponding to the oil and gas process pipeline. 敷设状况 AF is the value of the correction factor for the installation condition of the oil and gas process pipeline. 周边气候 It is the value of the surrounding climate correction factor corresponding to the oil and gas process pipeline.

[0102] In this embodiment, the external corrosion rates of different process pipelines can be quickly determined through the external corrosion baseline rate of the oil and gas process pipeline and the external corrosion correction factor based on the fault tree, which provides a basis for the inspection and maintenance of the process pipelines in the station. Since each correction factor comprehensively includes the main influencing factors of the external corrosion of the process pipeline, the external corrosion rate can be determined more accurately. It should be noted that the method for determining the corrosion rate of the oil and gas process pipeline provided in this embodiment, combined with the fault tree analysis, determines the external corrosion factors of the process pipeline, obtains the risk-based theoretical corrosion rate, and provides a basis for the inspection and maintenance of the process pipeline.

[0103] The method for determining the corrosion rate of an oil and gas process pipeline provided by an embodiment of the present invention is further explained and illustrated by taking a specific example as follows.

[0104] Take the outlet pipe section of a finished oil pump in a finished oil station as an example to calculate its internal and external corrosion rates. Figure 2 , assuming that the internal corrosion rate of the pipe section is r 内基 5.08×10 -2 mm / year, external corrosion benchmark rate r 外基 1.27×10 -1 mm / year, and the pipeline conditions of this section are: no water deposition, no blind pipe section, elbows, no cathodic protection, the external anti-corrosion coating is intact and less than 5 years, the medium flow rate is greater than 3m / s, this section is an above-ground pipeline, so the soil corrosiveness is considered to be very small, the annual average temperature of the oil station is 22℃-28℃, it belongs to the subtropical marine monsoon climate, and the air humidity is high. Substituting the internal and external corrosion base rates and related correction factors into the formula, the internal and external corrosion rates of this section can be obtained:

[0105] r 内 =5.08*10 -2 *0.5*0.5*2*3=7.62*10 -2 mm / year

[0106] r 外 =1.27*10 -1 *0.46*1.33*1*0.5*0.5*1.5=2.91*10 -2 mm / year

[0107] It can be seen that in this embodiment, the internal and external corrosion rates of different process pipelines can be quickly determined through the internal and external corrosion baseline rates of the oil and gas process pipelines and the internal and external corrosion correction factors based on the fault tree, which provides a basis for the inspection and maintenance of the process pipelines in the station. Since each correction factor comprehensively includes the main influencing factors of the internal and external corrosion of the process pipeline, the internal and external corrosion rates can be determined more accurately.

[0108] It should be noted that the method for determining the corrosion rate of the oil and gas process pipeline provided in this embodiment, combined with the fault tree analysis, determines the internal and external corrosion factors of the process pipeline, obtains the risk-based theoretical corrosion rate, and provides a basis for the inspection and maintenance of the process pipeline.

[0109] Figure 3 FIG. 2 shows a schematic diagram of the structure of a device for determining the corrosion rate of an oil and gas process pipeline provided by an embodiment of the present invention. Figure 3 As shown, the oil and gas process pipeline corrosion rate determination device provided by the embodiment of the present invention includes: a first determination module 11, a second determination module 12, a third determination module 13 and a fourth determination module 14, wherein:

[0110] The first determination module 11 is used to determine the internal corrosion reference rate and the external corrosion reference rate corresponding to the oil and gas process pipeline;

[0111] The second determination module 12 is used to determine the internal corrosion rate correction factor and the external corrosion rate correction factor corresponding to the oil and gas process pipeline;

[0112] A third determination module 13 is used to determine the internal corrosion rate corresponding to the oil and gas process pipeline according to the internal corrosion reference rate and the internal corrosion rate correction factor;

[0113] The fourth determination module 14 is used to determine the external corrosion rate corresponding to the oil and gas process pipeline according to the external corrosion reference rate and the external corrosion rate correction factor.

[0114] Further, based on the content of the above embodiment, in this embodiment, the second determining module 12 includes:

[0115] The first determination unit is used to obtain the dynamic damage events of internal and external corrosion of oil and gas process pipelines according to the fault tree analysis, and determine the correction factors of internal corrosion rate, including: water deposition condition correction factor, product fluidity correction factor, medium flow rate correction factor and pipeline structure correction factor; the correction factors of external corrosion rate include: soil resistivity correction factor, cathodic protection correction factor, anti-corrosion layer condition correction factor, coating age correction factor, laying condition correction factor and surrounding climate correction factor;

[0116] The second determination unit is used to input the pipeline condition information of the oil and gas process pipeline into a preset correction factor matching model, and output the value of the water deposition condition correction factor corresponding to the oil and gas process pipeline, the value of the product fluidity correction factor, the value of the medium flow rate correction factor, the value of the pipeline structure correction factor, the value of the soil resistivity correction factor, the value of the cathodic protection correction factor, the value of the anti-corrosion layer condition correction factor, the value of the coating age correction factor, the value of the laying condition correction factor and the value of the surrounding climate correction factor.

[0117] Further, based on the content of the above embodiment, in this embodiment, the third determination module 13 is specifically used for:

[0118] Determine the internal corrosion rate of the oil and gas process pipeline according to the first relationship model below:

[0119] r 内 =r 内基 *AF 水沉积状况 *AF 产品流动性 *AF 介质流速 *AF 管道结构

[0120] Among them, r 内 is the internal corrosion rate of the oil and gas process pipeline, r 内基 is the internal corrosion benchmark rate corresponding to the oil and gas process pipeline, AF 水沉积状况 is the value of the water deposition correction factor corresponding to the oil and gas process pipeline, AF 产品流动性 is the value of the product fluidity correction factor corresponding to the oil and gas process pipeline, AF 介质流速 is the value of the medium velocity correction factor corresponding to the oil and gas process pipeline, AF 管道结构 It is the value of the pipeline structure correction factor corresponding to the oil and gas process pipeline.

[0121] Further, based on the content of the above embodiment, in this embodiment, the fourth determining module 14 is specifically used to:

[0122] Determine the external corrosion rate corresponding to the oil and gas process pipeline according to the following second relationship model:

[0123] r 外 =r 外基 *AF 土壤电阻率 *AF 阴极保护 *AF 防腐层状况 *AF 涂层年限 *AF 敷设状况 *AF 周边气候

[0124] Among them, r 外 is the external corrosion rate corresponding to the oil and gas process pipeline, r 外基 is the external corrosion benchmark rate corresponding to the oil and gas process pipeline, AF 土壤电阻率 is the value of the soil resistivity correction factor corresponding to the oil and gas process pipeline, AF 阴极保护 is the value of the cathodic protection correction factor corresponding to the oil and gas process pipeline, AF 防腐层状况 is the value of the anti-corrosion layer condition correction factor corresponding to the oil and gas process pipeline, AF 涂层年限 AF is the value of the coating life correction factor corresponding to the oil and gas process pipeline. 敷设状况 AF is the value of the correction factor for the installation condition of the oil and gas process pipeline.周边气候 It is the value of the surrounding climate correction factor corresponding to the oil and gas process pipeline.

[0125] Since the oil and gas process pipeline corrosion rate determination device provided in the embodiment of the present invention can be used to execute the oil and gas process pipeline corrosion rate determination method described in the above embodiment, its working principle and beneficial effects are similar, so they will not be described in detail here. For specific contents, please refer to the introduction of the above embodiment.

[0126] Based on the same inventive concept, another embodiment of the present invention provides an electronic device, see Figure 4 , the electronic device specifically includes the following contents: a processor 401, a memory 402, a communication interface 403 and a bus 404;

[0127] The processor 401, the memory 402, and the communication interface 403 communicate with each other via the bus 404;

[0128] The processor 401 is used to call the computer program in the memory 402. When the processor executes the computer program, all the steps of the above method are implemented. For example, when the processor executes the computer program, the following process is implemented: determining the internal corrosion baseline rate and the external corrosion baseline rate corresponding to the oil and gas process pipeline; determining the internal corrosion rate correction factor and the external corrosion rate correction factor corresponding to the oil and gas process pipeline; determining the internal corrosion rate corresponding to the oil and gas process pipeline based on the internal corrosion baseline rate and the internal corrosion rate correction factor; determining the external corrosion rate corresponding to the oil and gas process pipeline based on the external corrosion baseline rate and the external corrosion rate correction factor.

[0129] It can be understood that the detailed functions and extended functions that can be executed by the computer program can refer to the above description.

[0130] Based on the same inventive concept, another embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, all the steps of the above method are implemented. For example, when the processor executes the computer program, the following process is implemented: determining an internal corrosion baseline rate and an external corrosion baseline rate corresponding to the oil and gas process pipeline; determining an internal corrosion rate correction factor and an external corrosion rate correction factor corresponding to the oil and gas process pipeline; determining the internal corrosion rate corresponding to the oil and gas process pipeline based on the internal corrosion baseline rate and the internal corrosion rate correction factor; determining the external corrosion rate corresponding to the oil and gas process pipeline based on the external corrosion baseline rate and the external corrosion rate correction factor.

[0131] It can be understood that the detailed functions and extended functions that can be executed by the computer program can refer to the above description.

[0132] In addition, the logic instructions in the above-mentioned memory can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0133] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiments of the present invention. Those of ordinary skill in the art may understand and implement them without creative effort.

[0134] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0135] In addition, in the present invention, terms such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0136] In addition, in the present invention, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0137] In addition, in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for determining the corrosion rate of an oil and gas process pipeline, characterized in that: include: Determine the internal corrosion benchmark rate and external corrosion benchmark rate corresponding to the oil and gas process pipeline; Determine the internal corrosion rate correction factor and external corrosion rate correction factor corresponding to the oil and gas process pipeline; Determining the internal corrosion rate corresponding to the oil and gas process pipeline according to the internal corrosion reference rate and the internal corrosion rate correction factor; Determining the external corrosion rate corresponding to the oil and gas process pipeline according to the external corrosion reference rate and the external corrosion rate correction factor; The method of determining the internal corrosion rate correction factor and the external corrosion rate correction factor corresponding to the oil and gas process pipeline specifically includes: According to the fault tree analysis, the dynamic damage events of internal and external corrosion of oil and gas process pipelines are obtained, and the correction factors for internal corrosion rate are determined, including: water deposition condition correction factor, product fluidity correction factor, medium flow rate correction factor and pipeline structure correction factor. The correction factors for external corrosion rate include: soil resistivity correction factor, cathodic protection correction factor, anti-corrosion layer condition correction factor, coating age correction factor, laying condition correction factor and surrounding climate correction factor; The pipeline condition information of the oil and gas process pipeline is input into the preset correction factor matching model, and the values ​​of the water deposition condition correction factor, the product fluidity correction factor, the medium flow rate correction factor, the pipeline structure correction factor, the soil resistivity correction factor, the cathodic protection correction factor, the anti-corrosion layer condition correction factor, the coating age correction factor, the laying condition correction factor and the surrounding climate correction factor corresponding to the oil and gas process pipeline are output.

2. The method for determining the corrosion rate of an oil and gas process pipeline according to claim 1, characterized in that: Determining the internal corrosion rate corresponding to the oil and gas process pipeline according to the internal corrosion reference rate and the internal corrosion rate correction factor specifically includes: Determine the internal corrosion rate of the oil and gas process pipeline according to the first relationship model below: r 内 =r 内基 *OF 水沉积状况 *OF 产品流动性 *OF 介质流速 *OF 管道结构 Among them, r 内 is the internal corrosion rate of the oil and gas process pipeline, r 内基 is the internal corrosion benchmark rate corresponding to the oil and gas process pipeline, AF 水沉积状况 is the value of the water deposition correction factor corresponding to the oil and gas process pipeline, AF 产品流动性 is the value of the product fluidity correction factor corresponding to the oil and gas process pipeline, AF 介质流速 is the value of the medium velocity correction factor corresponding to the oil and gas process pipeline, AF 管道结构 It is the value of the pipeline structure correction factor corresponding to the oil and gas process pipeline.

3. The method for determining the corrosion rate of an oil and gas process pipeline according to claim 1, characterized in that: Determining the external corrosion rate corresponding to the oil and gas process pipeline according to the external corrosion reference rate and the external corrosion rate correction factor specifically includes: Determine the external corrosion rate corresponding to the oil and gas process pipeline according to the following second relationship model: r 外 =r 外基 *OF 土壤电阻率 *OF 阴极保护 *OF 防腐层状况 *OF 涂层年限 *OF 敷设状况 *OF 周边气候 Among them, r 外 is the external corrosion rate corresponding to the oil and gas process pipeline, r 外基 is the external corrosion benchmark rate corresponding to the oil and gas process pipeline, AF 土壤电阻率 is the value of the soil resistivity correction factor corresponding to the oil and gas process pipeline, AF 阴极保护 is the value of the cathodic protection correction factor corresponding to the oil and gas process pipeline, AF 防腐层状况 is the value of the anti-corrosion layer condition correction factor corresponding to the oil and gas process pipeline, AF 涂层年限 AF is the value of the coating life correction factor corresponding to the oil and gas process pipeline. 敷设状况 AF is the value of the correction factor for the installation condition of the oil and gas process pipeline. 周边气候 It is the value of the surrounding climate correction factor corresponding to the oil and gas process pipeline.

4. A device for determining the corrosion rate of an oil and gas process pipeline, characterized in that: include: The first determination module is used to determine the internal corrosion reference rate and the external corrosion reference rate corresponding to the oil and gas process pipeline; The second determination module is used to determine the internal corrosion rate correction factor and the external corrosion rate correction factor corresponding to the oil and gas process pipeline; A third determination module is used to determine the internal corrosion rate corresponding to the oil and gas process pipeline according to the internal corrosion reference rate and the internal corrosion rate correction factor; A fourth determination module, used to determine the external corrosion rate corresponding to the oil and gas process pipeline according to the external corrosion reference rate and the external corrosion rate correction factor; The second determining module includes: The first determination unit is used to obtain the dynamic damage events of internal and external corrosion of oil and gas process pipelines according to the fault tree analysis, and determine the correction factors of internal corrosion rate, including: water deposition condition correction factor, product fluidity correction factor, medium flow rate correction factor and pipeline structure correction factor; the correction factors of external corrosion rate include: soil resistivity correction factor, cathodic protection correction factor, anti-corrosion layer condition correction factor, coating age correction factor, laying condition correction factor and surrounding climate correction factor; The second determination unit is used to input the pipeline condition information of the oil and gas process pipeline into a preset correction factor matching model, and output the value of the water deposition condition correction factor corresponding to the oil and gas process pipeline, the value of the product fluidity correction factor, the value of the medium flow rate correction factor, the value of the pipeline structure correction factor, the value of the soil resistivity correction factor, the value of the cathodic protection correction factor, the value of the anti-corrosion layer condition correction factor, the value of the coating age correction factor, the value of the laying condition correction factor and the value of the surrounding climate correction factor.

5. The device for determining the corrosion rate of an oil and gas process pipeline according to claim 4, characterized in that: The third determination module is specifically used to: Determine the internal corrosion rate of the oil and gas process pipeline according to the first relationship model below: r 内 =r 内基 *OF 水沉积状况 *OF 产品流动性 *OF 介质流速 *OF 管道结构 Among them, r 内 is the internal corrosion rate of the oil and gas process pipeline, r 内基 is the internal corrosion benchmark rate corresponding to the oil and gas process pipeline, AF 水沉积状况 is the value of the water deposition correction factor corresponding to the oil and gas process pipeline, AF 产品流动性 is the value of the product fluidity correction factor corresponding to the oil and gas process pipeline, AF 介质流速 is the value of the medium velocity correction factor corresponding to the oil and gas process pipeline, AF 管道结构 It is the value of the pipeline structure correction factor corresponding to the oil and gas process pipeline.

6. The oil and gas process pipeline corrosion rate determination device according to claim 4, characterized in that: The fourth determining module is specifically used for: Determine the external corrosion rate corresponding to the oil and gas process pipeline according to the following second relationship model: r 外 =r 外基 *OF 土壤电阻率 *OF 阴极保护 *OF 防腐层状况 *OF 涂层年限 *OF 敷设状况 *OF 周边气候 Among them, r 外 is the external corrosion rate corresponding to the oil and gas process pipeline, r 外基 is the external corrosion benchmark rate corresponding to the oil and gas process pipeline, AF 土壤电阻率 is the value of the soil resistivity correction factor corresponding to the oil and gas process pipeline, AF 阴极保护 is the value of the cathodic protection correction factor corresponding to the oil and gas process pipeline, AF 防腐层状况 is the value of the anti-corrosion layer condition correction factor corresponding to the oil and gas process pipeline, AF 涂层年限 AF is the value of the coating life correction factor corresponding to the oil and gas process pipeline. 敷设状况 AF is the value of the correction factor for the installation condition of the oil and gas process pipeline. 周边气候 It is the value of the surrounding climate correction factor corresponding to the oil and gas process pipeline.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method for determining the corrosion rate of an oil and gas process pipeline as claimed in any one of claims 1 to 3 are implemented.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for determining the corrosion rate of an oil and gas process pipeline as claimed in any one of claims 1 to 3 are implemented.

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