Numerical evaluation method and device for failure of lining gathering and transportation pipeline

Abstract

The embodiment of the invention relates to a numerical evaluation method and device for failure of a lining gathering and transportation pipeline. Comprising the following steps: generating a finite element geometric model and a material model based on a to-be-evaluated target lining gathering and transportation pipeline and environmental information of the target lining gathering and transportation pipeline, and generating an acting load parameter generated by the environmental information on the target lining gathering and transportation pipeline; generating a numerical calculation grid based on the finite element geometric model, a material model and an acting load parameter; performing three-dimensional numerical calculation on the target lining gathering and transportation pipeline based on the numerical calculation grid to obtain a three-dimensional numerical calculation result; and performing failure evaluation on the target lining gathering and transportation pipeline based on the three-dimensional numerical calculation result. Therefore, environmental loads such as sea ice and sea waves and the fluid-solid coupling effect of the lining pipe are considered, the developed numerical simulation is closer to the real situation of oil field production, and the result can be quickly and accurately calculated and analyzed, so that the time cost is saved, and the calculation efficiency is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of measurement of composite material gathering and transportation pipelines in beach and sea areas, and in particular to a numerical evaluation method and device for failure of a lined gathering and transportation pipeline. Background Art

[0002] With the continuous depletion of land oil and gas, the proportion of offshore oil production has gradually increased. The development of marine oil and gas must go through the transportation link. Deep-sea oil and gas generally use special transport ships, such as LNG ships, etc., while offshore oil and gas production mostly uses submarine gathering and transportation pipelines. Therefore, offshore marine oil and gas blocks are usually built with supporting oil and gas pipelines. At present, many submarine pipelines built in the early stage have had problems to varying degrees. Some are close to their design life and face risks such as corrosion and cracks. There are reports of submarine pipeline damage every year. Once an accident occurs, it will lead to oil and gas leakage and cause huge economic losses, pollute the surrounding waters, and cause adverse social impacts.

[0003] In order to improve the service life of submarine gathering and transportation pipelines, composite material lining is used, and the technology of lining and relining to repair old pipes is applied to improve the performance of gathering and transportation pipelines. In order to evaluate the performance of submarine pipelines after repair, failure evaluation is required. At present, the inspection and performance evaluation test of lined pipelines are mainly concentrated on the mechanical properties and physical and chemical properties of pipes in the pipe making stage. Visual inspection, measurement inspection and pressure test are mainly used in the construction stage of lined pipelines. There is no system for non-destructive testing methods of lined pipelines in the operation stage. In the beach environment, gathering and transportation pipelines will be affected by ocean waves, ocean currents, sea ice, etc., causing the movement of lined gathering and transportation pipelines, which may further cause pipeline displacement or excessive force, which will shorten the service life in the lightest case and cause pipeline rupture and serious leakage accidents in the worst case. Therefore, it is very important to strengthen various indicators of gathering and transportation pipelines from the design source to ensure the safety of gathering and transportation pipelines.

[0004] Numerical simulation technology can fully consider the complex environmental loads of the beach and sea, accurately obtain the mechanical response of the lined gathering and transportation pipeline, and provide an effective means for the damage evaluation and failure of the lined pipeline. At present, there is no systematic and effective numerical evaluation method for the gathering and transportation pipeline with composite material lining on the seabed. Most studies only use numerical simulation to perform numerical calculations on the pipeline matrix (mainly risers), but this calculation only establishes a numerical model of the marine pipeline matrix, and does not consider the composite material lining model, especially the bonding model between the lining material and the pipeline matrix. Therefore, it is impossible to carry out numerical analysis on the lined pipeline. In addition, there is no clear calculation method for the calculation length of the numerical model at present, and the numerical model can only select a finite length. How to determine the calculation length of the model, while not affecting the analysis accuracy, use the minimum calculation length, so as to save calculation cycles and reduce calculation costs, is a problem that needs to be solved. In addition, the boundary conditions at both ends of the lined gathering and transportation pipeline also have a great influence on the accuracy of the calculation results. The current models define the boundaries as fixed ends, and believe that the axial deformation of the pipeline has no effect on the results, which aggravates the error of the numerical simulation results. Summary of the invention

[0005] In view of this, in order to solve the above technical problems or part of the technical problems, an embodiment of the present invention provides a numerical evaluation method and device for failure of a lined gathering and transportation pipeline.

[0006] In a first aspect, an embodiment of the present invention provides a numerical evaluation method for failure of a lined gathering and transportation pipeline, comprising: Generate a finite element geometric model and a material model based on the target lined gathering pipeline to be evaluated and the environmental information where the target lined gathering pipeline is located, and load parameters of the target lined gathering pipeline caused by the environmental information; Generate a numerical calculation grid based on the finite element geometric model, material model and load parameters; Performing three-dimensional numerical calculation on the target lined gathering and transportation pipeline based on the numerical calculation grid to obtain a three-dimensional numerical calculation result; A failure evaluation is performed on the target lined gathering and transportation pipeline based on the three-dimensional numerical calculation results.

[0007] In a possible implementation, the method further includes: The environmental information includes at least information on sea ice, ocean currents, ocean waves and ground subsidence; Read the geometric and material parameters of the pipeline matrix, the geometric and material parameters of the lining, the performance parameters of the bonding interface, the material parameters of the boundary spring element, and the material parameters of the soil spring from the finite element geometric model and material model; The load parameters of the target lined gathering and transportation pipeline caused by the sea ice, ocean current, ocean wave and ground subsidence information are calculated.

[0008] In a possible implementation, the method further includes: A numerical calculation grid is generated based on the geometric and material parameters of the pipeline matrix, the geometric and material parameters of the lining, the performance parameters of the bonding interface, the material parameters of the boundary spring element, the material parameters of the soil spring and the load parameters.

[0009] In a possible implementation, the method further includes: Obtaining preset calculation boundary conditions, and setting a variety of large deformation analysis parameters based on the calculation boundary conditions, wherein the calculation boundary conditions are determined according to the sliding friction between the gathering and transportation pipeline and the soil, the area of ​​the gathering and transportation pipeline, the elastic modulus of the calculation pipeline material, and the calculation pipeline equivalent spring elongation; Based on the numerical calculation grid, three-dimensional numerical calculation is performed on the target lined gathering and transportation pipeline through the multiple large deformation analysis parameters, load parameters, and calculation boundary conditions to obtain a three-dimensional numerical calculation result.

[0010] In a possible implementation, the method further includes: Determine multiple abnormal data of the target liner gathering pipeline based on the three-dimensional numerical calculation results, wherein the multiple abnormal data at least include axial deformation, lateral deformation, local buckling deformation, axial elongation of the bonding interface between the liner and the gathering pipeline matrix, yield stress of the gathering pipeline matrix, and misalignment force between the liner and the gathering pipeline matrix; A failure evaluation is performed on the target liner gathering pipeline based on the preset multiple critical values ​​and the multiple abnormal data.

[0011] In a possible implementation, the finite element geometric model includes: a pipeline matrix model, an interface bonding model between the liner and the pipeline matrix, a liner material model, a soil spring model, and a boundary spring model; The pipeline matrix model is an elastic-plastic three-way model, the lining material model uses an equivalent modulus to simplify its non-uniform properties, and a progressive damage model is used to analyze the failure of the lining material.

[0012] In one possible implementation, the liner and pipeline matrix interface bonding model includes axial friction force, annular friction force and radial contact force at the contact interface between the liner material and the target liner gathering pipeline matrix material; The soil spring model includes parameters of the spring elastic deformation stage, elastic-plastic deformation stage, and plastic deformation stage.

[0013] In a second aspect, an embodiment of the present invention provides a numerical evaluation device for failure of a liner gathering and transportation pipeline, comprising: A generation module, for generating a finite element geometric model and a material model based on the target lined gathering pipeline to be evaluated and the environmental information where the target lined gathering pipeline is located, and load parameters of the target lined gathering pipeline generated by the environmental information; A generation module, used for generating a numerical calculation grid based on the finite element geometric model, the material model and the load parameters; A calculation module, used for performing three-dimensional numerical calculation on the target lined gathering and transportation pipeline based on the numerical calculation grid to obtain a three-dimensional numerical calculation result; An evaluation module is used to perform failure evaluation on the target lined gathering and transportation pipeline based on the three-dimensional numerical calculation results.

[0014] In a third aspect, an embodiment of the present invention provides an electronic device, comprising: a processor and a memory, wherein the processor is used to execute a numerical evaluation program for failure of a lined gathering and transportation pipeline stored in the memory, so as to implement the numerical evaluation method for failure of a lined gathering and transportation pipeline described in the first aspect above.

[0015] In a fourth aspect, an embodiment of the present invention provides a storage medium, comprising: the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the numerical evaluation method for failure of lined gathering pipelines described in the first aspect above.

[0016] The numerical evaluation scheme for failure of lined gathering and transportation pipelines provided in the embodiment of the present invention generates a finite element geometric model and a material model based on the target lined gathering and transportation pipeline to be evaluated and the environmental information where the target lined gathering and transportation pipeline is located, and the load parameters generated by the environmental information on the target lined gathering and transportation pipeline; generates a numerical calculation grid based on the finite element geometric model and the material model and the load parameters; performs three-dimensional numerical calculation on the target lined gathering and transportation pipeline based on the numerical calculation grid to obtain a three-dimensional numerical calculation result; and performs failure evaluation on the target lined gathering and transportation pipeline based on the three-dimensional numerical calculation result. Compared with the existing numerical evaluation methods with small coverage and inaccurate evaluation results, this scheme takes into account environmental loads such as sea ice and waves, and the fluid-solid coupling effect of the liner pipe, and the numerical simulation carried out is closer to the actual situation of oil field production, and can quickly and accurately calculate and analyze the results, thereby saving time and cost and improving calculation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic flow chart of a numerical evaluation method for failure of a lined gathering and transportation pipeline provided by an embodiment of the present invention; Figure 2 A schematic flow chart of another numerical evaluation method for failure of a lined gathering and transportation pipeline provided by an embodiment of the present invention; Figure 3A schematic structural diagram of a numerical evaluation device for failure of a liner gathering and transportation pipeline provided by an embodiment of the present invention; Figure 4 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention; Figure 5 A schematic diagram of the structure of a liner gathering and transportation pipeline in a beach environment provided by an embodiment of the present invention; Figure 6 A schematic diagram of a finite element model of a liner gathering and transportation pipeline in a beach sea environment provided by an embodiment of the present invention; Figure 7 A schematic diagram of a numerical calculation grid of a lining gathering and transportation pipeline-soil spring in a beach environment provided by an embodiment of the present invention; Figure 8 A schematic diagram of constraints and load application for a liner gathering and transportation pipeline in a beach sea environment provided by an embodiment of the present invention; Fig. 9 A schematic diagram of nonlinear numerical calculation of a liner gathering and transportation pipeline in a beach sea environment provided by an embodiment of the present invention; Fig.10 A Mises stress cloud diagram of a liner gathering and transportation pipeline in a beach sea environment under the impact of waves provided by an embodiment of the present invention; Fig.11 A Mises stress cloud diagram of a liner gathering and transportation pipeline matrix in a beach sea environment under the impact of waves provided by an embodiment of the present invention; Fig.12 A stress cloud diagram of the inner lining layer of a lining gathering and transportation pipeline in a beach sea environment under the impact of sea waves provided by an embodiment of the present invention; Fig.13 A schematic structural diagram of a numerical evaluation system for failure of a lined gathering and transportation pipeline provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] 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.

[0019] To facilitate understanding of the embodiments of the present invention, specific embodiments will be further explained below in conjunction with the accompanying drawings. The embodiments do not constitute a limitation on the embodiments of the present invention.

[0020] Embodiment 1 Figure 1 A flow chart of a numerical evaluation method for failure of a lined gathering and transportation pipeline provided by an embodiment of the present invention is shown as follows: Figure 1 As shown, the method specifically includes: S11. Generate a finite element geometry model and a material model based on the target lined gathering pipeline to be evaluated and the environmental information where the target lined gathering pipeline is located, and load parameters of the target lined gathering pipeline caused by the environmental information.

[0021] In the embodiment of the present invention, Figure 5 The structural schematic diagram of the lined gathering and transportation pipeline in a beach sea environment is shown. First, based on the target lined gathering and transportation pipeline to be evaluated and the environmental information of the target lined gathering and transportation pipeline, a finite element geometric model and a material model of the lined pipeline in a complex beach sea environment are created, including a pipeline matrix model, an interface bonding model between the liner and the pipeline matrix, a liner material model, a soil spring model and a boundary spring model.

[0022] Furthermore, based on the target lined gathering and transportation pipeline to be evaluated and the environmental information where the target lined gathering and transportation pipeline is located, the load parameters of the liner pipe caused by the sea ice, ocean currents, ocean waves, ground subsidence and other environments in the beach are calculated.

[0023] S12. Generate a numerical calculation grid based on the finite element geometric model, material model and load parameters.

[0024] The geometric and material parameters of the pipeline matrix, the geometric and material parameters of the lining, the performance parameters of the bonding interface, the material parameters of the boundary spring element, and the material parameters of the soil spring are read from the finite element geometric model and material model, and a numerical calculation grid is generated through the above multiple parameters and the load parameters using a grid calculation method.

[0025] S13. Perform three-dimensional numerical calculation on the target lined gathering and transportation pipeline based on the numerical calculation grid to obtain a three-dimensional numerical calculation result.

[0026] Obtain the preset calculation boundary conditions, select the large deformation nonlinear analysis algorithm of the liner pipe, the calculation load time step, the calculation time and other parameters, and then perform three-dimensional numerical calculation on the target lined gathering and transportation pipeline based on the geometric and material parameters of the pipeline matrix, the geometric and material parameters of the liner, the performance parameters of the bonding interface, the material parameters of the boundary spring element, the material parameters of the soil spring and the load parameters, and the numerical calculation grid to obtain the three-dimensional numerical calculation results.

[0027] S14. Perform failure evaluation on the target lined gathering and transportation pipeline based on the three-dimensional numerical calculation results.

[0028] The three-dimensional numerical calculation results can be used to determine the stress and deformation parameters of the target lined gathering and transportation pipeline under the complex environmental load of the beach. According to the "Seismic Design Code for Buried Oil (Gas) Steel Pipelines" (SY / T0450-97), when the Mise stress of the gathering and transportation pipeline exceeds the pipeline yield stress (the specific value is related to the pipeline material), or the strain exceeds the yield strain value, it can be judged that the target lined gathering and transportation pipeline has failed. The numerical evaluation method for failure of a lined gathering and transportation pipeline provided in an embodiment of the present invention generates a finite element geometric model and a material model based on the target lined gathering and transportation pipeline to be evaluated and the environmental information where the target lined gathering and transportation pipeline is located, and the load parameters generated by the environmental information on the target lined gathering and transportation pipeline; generates a numerical calculation grid based on the finite element geometric model, the material model and the load parameters; performs three-dimensional numerical calculation on the target lined gathering and transportation pipeline based on the numerical calculation grid to obtain a three-dimensional numerical calculation result; and performs failure evaluation on the target lined gathering and transportation pipeline based on the three-dimensional numerical calculation result. Compared with the existing numerical evaluation method, which only uses numerical simulation to perform numerical calculation on the pipeline matrix (mainly the riser), only establishes a numerical model of the marine pipeline matrix, does not consider the composite material lining model, has a small coverage area, and the numerical model can only select a finite length, and defines the boundary as a fixed end, which causes a large error in the numerical simulation result. By considering environmental loads such as sea ice and waves, and the fluid-solid coupling effect of the liner pipe, the numerical simulation carried out by this method is closer to the actual situation of oil field production, and can quickly and accurately calculate and analyze the results, thereby saving time and cost and improving calculation efficiency. This also solves the problem that there is no numerical model available for lined gathering pipelines.

[0029] Embodiment 2 Figure 2 A flow chart of another numerical evaluation method for failure of a lined gathering and transportation pipeline provided by an embodiment of the present invention is shown as follows: Figure 2 As shown, the method specifically includes: S21. Read the geometric and material parameters of the pipeline matrix, the geometric and material parameters of the lining, the performance parameters of the bonding interface, the material parameters of the boundary spring element, and the material parameters of the soil spring from the finite element geometric model and material model.

[0030] S22, calculating load parameters of the target lined gathering and transportation pipeline caused by the sea ice, ocean current, ocean wave and ground subsidence information.

[0031] In the embodiment of the present invention, Figure 5 The structural schematic diagram of the lined gathering and transportation pipeline in the beach sea environment is shown. First, based on the target lined gathering and transportation pipeline to be evaluated and the environmental information where the target lined gathering and transportation pipeline is located, a finite element geometric model and a material model of the lined pipeline in the complex beach sea environment are created, such as Figure 6As shown. It includes pipeline matrix model, lining and pipeline matrix interface bonding model, lining material model, soil spring model and boundary spring model. Among them, the pipeline matrix model is an elastic-plastic three-line model, the lining material model uses the equivalent modulus to simplify its non-uniform properties, and uses the progressive damage model to analyze the failure of the lining material. The lining and pipeline matrix interface bonding model includes the axial friction, annular friction and radial contact force of the contact interface between the lining material and the target lining gathering pipeline matrix material, which can be analyzed using point contact mode and soft spring technology. Among them, the geometric dimensions of the pipeline model are an outer diameter of 76mm, a wall thickness of 4mm, and a material model of 16Mn; the outer diameter of the lining layer is 68mm, the wall thickness is 5mm, and the material model is fiberglass; the type of buried soil is silty clay, and the burial depth is 1.2m.

[0032] S23. Generate a numerical calculation grid based on the geometric and material parameters of the pipeline matrix, the geometric and material parameters of the lining, the performance parameters of the bonding interface, the material parameters of the boundary spring element, the material parameters of the soil spring and the load parameters.

[0033] The geometric and material parameters of the pipeline matrix, the geometric and material parameters of the lining, the performance parameters of the bonding interface, the material parameters of the boundary spring element, and the material parameters of the soil spring are read from the finite element geometric model and material model, and the numerical calculation grid is generated through the above multiple parameters and the load parameters using the grid calculation method. Figure 7 As shown, the unit type of the pipeline matrix and the lining layer is Solid185, the minimum unit size is 1mm, and the total number of units is 82072. Among them, the set and material parameters of the pipeline matrix include the calculated length of the gathering and transportation pipeline, which is determined based on the quantitative relationship analysis results between the lateral deformation value of the pipe string and the length of the pipeline calculation model. The principle is that when the length of the gathering and transportation pipeline is as small as possible, the range of the lateral deformation of the pipeline remains basically unchanged. After verification, the calculated length of the embodiment of the present invention is 3m.

[0034] S24. Obtain preset calculation boundary conditions, and set a variety of large deformation analysis parameters based on the calculation boundary conditions.

[0035] like Figure 8 As shown, the preset calculation boundary conditions are obtained, wherein the calculation boundary conditions of the gathering and transportation pipeline are determined based on the sliding friction between the gathering and transportation pipeline and the soil, the area of ​​the gathering and transportation pipeline, the elastic modulus of the calculated pipeline material, and the equivalent spring elongation of the calculated pipeline, and can be adjusted according to the specific calculation situation. The calculation boundary conditions include but are not limited to the maximum dislocation force, the maximum longitudinal elongation, and the maximum yield strength. And a variety of large deformation analysis parameters are set based on the calculation boundary conditions.

[0036] Calculation of equivalent spring external force at the boundary of gathering and transportation pipeline F and ΔLThe calculation formula is as follows: Formula 1 In the formula, F is the external force on the equivalent spring, in N; F s is the sliding friction between the pipe and the soil per unit length, in N / m; A is the cross-sectional area of ​​the pipe, in m 2 ; E is the elastic modulus of the pipe, in Pa; Δ L is the equivalent spring elongation, in m.

[0037] The free end nodes of the axial spring unit constrain displacements in the X, Y, and Z directions. The free end nodes of the vertical spring unit constrain displacements in the X, Y, and Z directions. The horizontal spring unit constrains displacements in the X, Y, and Z directions of the free end nodes on the side where X<0. The horizontal spring unit constrains the free end nodes on the side where X>0 to apply wave impact force.

[0038] The calculation formula of wave impact force is as follows: Formula 2 Where: w It is the wave force per unit length acting vertically on the pipe column, in KN / m; w is the density of seawater, in kg / m3; is the diameter of the pipe, in m; is the horizontal velocity of the water particle at the axis of the pipe string, in m / s; is the drag coefficient; is the inertia coefficient.

[0039] According to the historical data of sea wave monitoring in the beach area, the wave height H is 3.02m, the wave period is 13.66s, and the resistance parameter C D The value is 0.88, the inertia coefficient C M The value is 1.18, and the density of seawater is 1.02kg / m 3 The wave velocity is 1.668m / s, and the calculated wave impact force per unit length is 96.236N / m.

[0040] S25. Based on the numerical calculation grid, three-dimensional numerical calculation is performed on the target lined gathering and transportation pipeline through the multiple large deformation analysis parameters, load parameters, and calculation boundary conditions to obtain a three-dimensional numerical calculation result.

[0041] like Fig. 9As shown, a variety of large deformation analysis parameters are set based on the calculation boundary conditions. Parameters such as the large deformation nonlinear analysis algorithm for the liner pipe, the calculation load time step, and the calculation time are selected, and then the three-dimensional numerical calculation of the target lined gathering and transportation pipeline is performed based on the geometric and material parameters of the pipeline matrix, the geometric and material parameters of the liner, the performance parameters of the bonding interface, the material parameters of the boundary spring element, the material parameters of the soil spring and the load parameters, and the numerical calculation grid to obtain the three-dimensional numerical calculation results. The calculation in this step includes the coupling effect of the ocean current and the lined gathering and transportation pipeline, and the flow model of the ocean current adopts full turbulence simulation. Among them, as Fig.10 The figure shows the overall Mises stress calculation result of the soil spring-gathering pipeline in the embodiment of the present invention. When the wave impact speed is 1.668m / s, the maximum Mises stress generated by the gathering pipeline is 0.15MPa. Fig.11 The figure shows the Mises stress calculation result of the gathering and transportation pipeline matrix in the embodiment of the present invention. When the wave impact speed is 1.668m / s, the maximum tensile stress generated by the lining layer is 0.04MPa. Fig.12 The figure shows the Mises stress calculation result of the gathering and transportation pipeline matrix in the embodiment of the present invention. When the wave impact speed is 1.668 m / s, the maximum Mises stress generated by the gathering and transportation pipeline is 0.15 MPa.

[0042] S26. Determine a plurality of abnormal data of the target liner gathering and transportation pipeline based on the three-dimensional numerical calculation result.

[0043] The three-dimensional numerical calculation results can be used to determine the stress and deformation parameters of the target lined gathering and transportation pipeline under the complex environmental load of the beach and sea. According to the stress and deformation parameters, it can be judged whether the target lined gathering and transportation pipeline will fail.

[0044] Specifically, the stress and deformation parameters of the target lined gathering and transportation pipeline under the complex environmental loads of the beach and sea include but are not limited to: axial deformation, lateral deformation, local buckling deformation of the lined gathering and transportation pipeline, axial elongation of the bonding interface between the liner and the gathering and transportation pipeline matrix, yield stress of the gathering and transportation pipeline matrix, and misalignment force between the liner and the gathering and transportation pipeline matrix.

[0045] S27, performing failure evaluation on the target liner gathering and transportation pipeline based on the preset multiple critical values ​​and the multiple abnormal data.

[0046] In an embodiment of the present invention, the data that undergoes a sudden change in the above data can be determined as abnormal data. Alternatively, the above data can be evaluated according to the preset maximum dislocation force, maximum longitudinal elongation, and maximum yield strength, and the data that exceeds the preset value can be regarded as abnormal data. Then, based on the abnormal data, a failure evaluation can be carried out on the target lined gathering and transportation pipeline. Among them, according to the "Seismic Design Code for Buried Steel Pipelines for Oil (Gas)" (SY / T0450-97), when the Mise stress of the gathering and transportation pipeline exceeds the yield limit stress of the pipeline (the specific value is related to the pipeline material), or the strain exceeds the yield limit strain value, it can be judged that the target lined gathering and transportation pipeline has failed. The embodiment of the present invention establishes a lining material model, a lining and substrate interface bonding model, a pipeline boundary model, and a pipeline spring element model, so that the established lined gathering pipeline numerical calculation model is more accurate and the calculation result is more precise.

[0047] On the other hand, the embodiment of the present invention uses the functional relationship between the calculated length of the lined gathering pipeline and the pipeline failure obtained by analysis to determine the calculated effective length of the lined gathering pipeline, thereby minimizing the calculation workload, thereby reducing the calculation cost and the configuration of the computing equipment.

[0048] The numerical evaluation method for failure of lined gathering and transportation pipelines provided in an embodiment of the present invention generates a finite element geometric model and a material model based on the target lined gathering and transportation pipeline to be evaluated and the environmental information where the target lined gathering and transportation pipeline is located, and the load parameters generated by the environmental information on the target lined gathering and transportation pipeline; generates a numerical calculation grid based on the finite element geometric model and the material model and the load parameters; performs three-dimensional numerical calculation on the target lined gathering and transportation pipeline based on the numerical calculation grid to obtain a three-dimensional numerical calculation result; and performs failure evaluation on the target lined gathering and transportation pipeline based on the three-dimensional numerical calculation result. This method takes into account environmental loads such as sea ice and waves, and the fluid-solid coupling effect of the liner, and the numerical simulation carried out is closer to the actual situation of oil field production, and can quickly and accurately calculate and analyze the results, thereby saving time and cost and improving calculation efficiency. This also solves the problem that there is no numerical model available for lined gathering and transportation pipelines.

[0049] Embodiment 3 Fig.13 A schematic diagram of a numerical evaluation system for failure of a liner gathering and transportation pipeline provided by an embodiment of the present invention is shown in FIG. Fig.13 As shown, the system includes: 1. Lined gathering and transportation pipeline model input module; 2. Beach and sea environment load calculation module; 3. Numerical simulation module; 4. Mechanical response and failure evaluation module.

[0050] The lined gathering and transportation pipeline model input module is used to create the finite element geometric model and material model of the lined pipeline based on the complex beach and sea environment, including the pipeline matrix model input, the liner and pipeline matrix interface bonding model input, the liner material model input, the soil spring model input and the boundary spring model input, which is connected to the beach and sea environment load calculation module.

[0051] The beach sea environment load calculation module is used to calculate the loads on the liner pipe caused by sea ice, ocean currents, waves, ground subsidence and other environments in the beach sea, and it is connected to the numerical simulation module.

[0052] The numerical simulation module includes a numerical model grid generation module, a boundary condition input module, a large deformation analysis parameter setting module, a numerical operation module, and a pipeline failure evaluation module. The numerical simulation module is connected to the mechanical response and failure evaluation module; after receiving the liner gathering and transportation pipeline model and the beach and sea environmental load calculation module, the numerical simulation module forms a grid that can be numerically calculated through the calculation grid production module. The boundary condition input module obtains the calculation boundary conditions, the large deformation analysis parameter setting module selects the large deformation nonlinear analysis algorithm of the liner pipe, the calculation load time step, the calculation time and other parameters, and the numerical operation module performs three-dimensional numerical calculation based on the liner gathering and transportation pipeline model input parameters, the load calculated by the beach and sea environmental load calculation module, the calculation grid generated by the numerical model grid generation module, and the boundary conditions input by the boundary condition input module, and sends the results of the three-dimensional numerical calculation to the mechanical response and failure evaluation module.

[0053] The mechanical response and failure evaluation module is used to calculate the results input by the numerical simulation module, display the stress and deformation parameters of the lined technical pipeline under the complex environmental load of the beach and sea, and determine whether the lined gathering and transportation pipeline will fail.

[0054] When performing numerical simulation, the following steps are included: Step S1, according to the actual design goal, input the design goal and design scenario through the lined gathering and transportation pipeline model input module, the model input module generates a finite element geometry model and a material model, specifically including the geometry and material parameters of the pipeline matrix, the geometry and material parameters of the lining, the performance parameters of the bonding interface, the material parameters of the boundary spring element, and the material parameters of the soil spring, and sends the finite element geometry model and the material model to the numerical simulation module.

[0055] Step S2: according to the beach sea environment design target, the beach sea environment load calculation module outputs the environmental loads under consideration, including sea ice, ocean currents, ocean waves, and ground subsidence, and sends the beach sea environment load parameters to the numerical simulation module.

[0056] Step S3, after receiving the finite element geometry and material model and the beach environment load, the numerical simulation module forms a mesh that can be numerically calculated through the numerical model mesh production module, the boundary condition input module obtains the liner pipeline calculation boundary conditions input by the liner gathering pipeline model input module, and the numerical calculation module performs three-dimensional numerical calculation based on the numerical calculation mesh and boundary conditions generated by the numerical calculation mesh generation module, and sends the results of the three-dimensional numerical calculation to the mechanical response and failure evaluation module.

[0057] Step S4, after completing the numerical calculation of the numerical simulation module, the mechanical response and failure evaluation module calculates and displays the axial deformation, lateral deformation, local buckling deformation, axial elongation of the bonding interface between the liner and the gathering and transportation pipeline matrix, the yield stress of the gathering and transportation pipeline matrix, and the misalignment force between the liner and the gathering and transportation pipeline matrix according to the calculation result data (three-dimensional numerical value) input by the numerical simulation module, and performs failure evaluation on the liner gathering and transportation pipeline according to the maximum misalignment force, maximum longitudinal elongation, and maximum yield strength input by the liner gathering and transportation pipeline model input module.

[0058] Preferably, in step S1, the boundary data of the lining calculation pipeline model input module is determined based on the sliding friction between the gathering and transportation pipeline and the soil, the gathering and transportation pipeline area, the elastic modulus of the calculated pipeline material, and the equivalent spring elongation of the calculated pipeline, and is adjusted according to the specific calculation situation.

[0059] Preferably, in step S1, the calculated length of the gathering and transportation pipeline of the lining calculation pipeline model input module is determined based on the quantitative relationship analysis result between the lateral deformation value of the pipe string and the length of the pipeline calculation model. The principle is that the lateral deformation variation range of the pipeline remains basically unchanged when the length of the gathering and transportation pipeline is as small as possible.

[0060] Preferably, in step S1, the pipeline matrix material model of the lining calculation pipeline model input module selects an elastic-plastic three-wire model, the lining composite material model uses an equivalent modulus to simplify its non-uniform properties, and uses a progressive damage model to analyze the failure of the lining material.

[0061] Preferably, in step S1, the lining calculation pipeline model input module's lining and pipeline matrix interface bonding model includes the axial friction force, annular friction force and radial contact force of the contact interface between the lining material and the gathering and transportation pipeline matrix material, and is analyzed using point contact mode and soft spring technology.

[0062] Preferably, in step S1, the soil spring model of the lining calculation pipeline model input module, the force-deformation relationship of the soil spring in the model is selected from the "Qianhai Fixed Platform Construction and Inspection Specifications", which includes parameters of the spring elastic deformation stage, elastoplastic deformation stage, and plastic deformation stage.

[0063] Preferably, in step S2, the environmental load of the beach sea environmental load calculation module includes ground subsidence, sea ice, ocean currents and ocean waves, and the load calculation parameters refer to "Shengli Beach Sea Marine Environmental Conditions".

[0064] Preferably, in step S3, the calculation of the numerical simulation module includes the coupling effect between the ocean current and the lined gathering and transportation pipeline, wherein the flow model of the ocean current adopts full turbulence simulation.

[0065] The numerical evaluation system for failure of lined gathering and transportation pipelines provided in an embodiment of the present invention can take into account environmental loads such as sea ice and waves, and the fluid-solid coupling effect of the lined pipes. The numerical simulation performed is closer to the actual situation of oil field production, and the results can be calculated and analyzed quickly and accurately, thereby solving the problem of saving time costs and improving computing efficiency, and also solving the problem of no numerical model available for lined gathering and transportation pipelines.

[0066] Figure 3 The schematic diagram of the structure of a numerical evaluation device for failure of a liner gathering and transportation pipeline according to an embodiment of the present invention is shown. Figure 3 As shown, the device comprises: The generation module 301 is used to generate a finite element geometric model and a material model based on the target lined gathering pipeline to be evaluated and the environmental information where the target lined gathering pipeline is located, and the load parameters of the target lined gathering pipeline generated by the environmental information. For detailed description, please refer to the relevant description corresponding to the above method embodiment, which will not be repeated here.

[0067] The generation module 301 is used to generate a numerical calculation grid based on the finite element geometric model, the material model and the load parameters. For detailed description, please refer to the relevant description corresponding to the above method embodiment, which will not be repeated here.

[0068] The calculation module 302 is used to perform three-dimensional numerical calculation on the target lined gathering and transportation pipeline based on the numerical calculation grid to obtain a three-dimensional numerical calculation result. For detailed description, please refer to the relevant description corresponding to the above method embodiment, which will not be repeated here.

[0069] The evaluation module 303 is used to perform failure evaluation on the target lined gathering and transportation pipeline based on the three-dimensional numerical calculation results. For detailed description, please refer to the relevant description corresponding to the above method embodiment, which will not be repeated here.

[0070] The numerical evaluation device for failure of lined gathering and transportation pipelines provided in an embodiment of the present invention is used to execute the numerical evaluation method for failure of lined gathering and transportation pipelines provided in the above embodiment. Its implementation method and principle are the same. For details, please refer to the relevant description of the above method embodiment and will not be repeated here.

[0071] Figure 4An electronic device according to an embodiment of the present invention is shown. Figure 4 As shown, the electronic device may include a processor 401 and a memory 402, wherein the processor 401 and the memory 402 may be connected via a bus or other means. Figure 4 The example of connecting through bus is taken in the following.

[0072] The processor 401 may be a central processing unit (CPU). The processor 401 may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or a combination of the above chips.

[0073] The memory 402 is a non-transitory computer-readable storage medium that can be used to store non-transitory software programs, non-transitory computer executable programs and modules, such as program instructions / modules corresponding to the method provided in the embodiment of the present invention. The processor 401 executes various functional applications and data processing of the processor by running the non-transitory software programs, instructions and modules stored in the memory 402, that is, implements the method in the above method embodiment.

[0074] The memory 402 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required by at least one function; the data storage area may store data created by the processor 401, etc. In addition, the memory 402 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 402 may optionally include a memory remotely arranged relative to the processor 401, and these remote memories may be connected to the processor 401 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0075] One or more modules are stored in the memory 402 , and when executed by the processor 401 , the method in the above method embodiment is executed.

[0076] The specific details of the above electronic device can be understood by referring to the corresponding descriptions and effects in the above method embodiments, and will not be repeated here.

[0077] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD), etc.; the storage medium can also include a combination of the above-mentioned types of memory.

[0078] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A numerical evaluation method for failure of lined gathering and transportation pipelines, characterized in that: include: Generate a finite element geometric model and a material model based on the target lined gathering pipeline to be evaluated and the environmental information where the target lined gathering pipeline is located, and load parameters of the target lined gathering pipeline caused by the environmental information; Generate a numerical calculation grid based on the finite element geometric model, material model and load parameters; Performing three-dimensional numerical calculation on the target lined gathering and transportation pipeline based on the numerical calculation grid to obtain a three-dimensional numerical calculation result; A failure evaluation is performed on the target lined gathering and transportation pipeline based on the three-dimensional numerical calculation results.

2. The method according to claim 1, characterized in that The environmental information includes at least information on sea ice, ocean currents, ocean waves and ground subsidence; The generating of the finite element geometric model and the material model based on the target lined gathering and transportation pipeline to be evaluated and the environmental information where the target lined gathering and transportation pipeline is located, and the load parameters of the target lined gathering and transportation pipeline generated by the environmental information, includes: Read the geometric and material parameters of the pipeline matrix, the geometric and material parameters of the lining, the performance parameters of the bonding interface, the material parameters of the boundary spring element, and the material parameters of the soil spring from the finite element geometric model and material model; The load parameters of the target lined gathering and transportation pipeline caused by the sea ice, ocean current, ocean wave and ground subsidence information are calculated.

3. The method according to claim 2, characterized in that The generating of a numerical calculation grid based on the finite element geometric model, the material model and the load parameters comprises: A numerical calculation grid is generated based on the geometric and material parameters of the pipeline matrix, the geometric and material parameters of the lining, the performance parameters of the bonding interface, the material parameters of the boundary spring element, the material parameters of the soil spring and the load parameters.

4. The method according to claim 3, characterized in that: The three-dimensional numerical calculation is performed on the target lined gathering and transportation pipeline based on the numerical calculation grid to obtain a three-dimensional numerical calculation result, including: Obtaining preset calculation boundary conditions, and setting a variety of large deformation analysis parameters based on the calculation boundary conditions, wherein the calculation boundary conditions are determined according to the sliding friction between the gathering and transportation pipeline and the soil, the area of ​​the gathering and transportation pipeline, the elastic modulus of the calculation pipeline material, and the calculation pipeline equivalent spring elongation; Based on the numerical calculation grid, three-dimensional numerical calculation is performed on the target lined gathering and transportation pipeline through the multiple large deformation analysis parameters, load parameters, and calculation boundary conditions to obtain a three-dimensional numerical calculation result.

5. The method according to claim 4, characterized in that The performing of failure evaluation on the target lined gathering and transportation pipeline based on the three-dimensional numerical calculation result includes: Determine multiple abnormal data of the target liner gathering pipeline based on the three-dimensional numerical calculation results, wherein the multiple abnormal data at least include axial deformation, lateral deformation, local buckling deformation, axial elongation of the bonding interface between the liner and the gathering pipeline matrix, yield stress of the gathering pipeline matrix, and misalignment force between the liner and the gathering pipeline matrix; A failure evaluation is performed on the target liner gathering pipeline based on the preset multiple critical values ​​and the multiple abnormal data.

6. The method according to claim 2, characterized in that The finite element geometric model includes: a pipeline matrix model, an interface bonding model between the liner and the pipeline matrix, a liner material model, a soil spring model and a boundary spring model; The pipeline matrix model is an elastic-plastic three-way line model, the lining material model uses an equivalent modulus to simplify its non-uniform properties, and a progressive damage model is used to analyze the failure of the lining material.

7. The method according to claim 6, characterized in that The liner and pipeline matrix interface bonding model includes axial friction force, annular friction force and radial contact force at the contact interface between the liner material and the target liner gathering and transportation pipeline matrix material; The soil spring model includes parameters of the spring elastic deformation stage, elastic-plastic deformation stage, and plastic deformation stage.

8. A numerical evaluation device for failure of a lined gathering and transportation pipeline, characterized in that: include: A generation module, for generating a finite element geometric model and a material model based on the target lined gathering pipeline to be evaluated and the environmental information where the target lined gathering pipeline is located, and load parameters of the target lined gathering pipeline generated by the environmental information; A generation module, used for generating a numerical calculation grid based on the finite element geometric model, the material model and the load parameters; A calculation module, used for performing three-dimensional numerical calculation on the target lined gathering and transportation pipeline based on the numerical calculation grid to obtain a three-dimensional numerical calculation result; An evaluation module is used to perform failure evaluation on the target lined gathering and transportation pipeline based on the three-dimensional numerical calculation results.

9. An electronic device, characterized in that: include: A processor and a memory, wherein the processor is used to execute a numerical evaluation program for failure of a lined gathering and transportation pipeline stored in the memory, so as to implement a numerical evaluation method for failure of a lined gathering and transportation pipeline as described in any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the numerical evaluation method for failure of the lined gathering and transportation pipeline described in any one of claims 1 to 7.

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