Method and system for acquiring dynamic impact data of tubular column under perforation working condition

Abstract

The invention relates to a method and a system for acquiring dynamic impact data of a tubular column under a perforation working condition, and the method for acquiring the dynamic impact data of the tubular column under the perforation working condition comprises the following steps: building a three-dimensional finite element simulation calculation model of the perforation tubular column according to the real working condition of the perforation tubular column, dynamic impact numerical simulation calculation of the perforation tubular column under the perforation working condition is carried out; according to the dynamic impact numerical simulation calculation result of the perforating string, drawing an equivalent stress change cloud picture of the perforating string, and analyzing the equivalent stress change condition of the perforating string; analyzing the dynamic impact condition of the perforating tubular column according to the equivalent stress change condition of the perforating tubular column; according to the dynamic impact condition of the perforation tubular column, the external load condition borne by the perforation tubular column is determined; and according to the external load condition of the perforation tubular column, dynamic impact load data of the perforation tubular column are obtained. According to the method, the dynamic impact data of the perforating tubular column can be accurately obtained, and a data basis is provided for further analyzing the dynamic damage problem of the perforating tubular column.

Description

Technical Field

[0001] The invention belongs to the technical field of oil well exploitation, and in particular relates to a method and a system for acquiring dynamic impact data of a pipe string under perforation conditions. Background Art

[0002] Under the perforating conditions of oil and gas wells, the explosion load will have a strong impact on the tubing, causing dynamic damage to the tubing. At present, the research on the dynamic damage problem of the perforating tubing is mainly based on the existing oil and gas well tubing mechanics system, analyzing the dynamic problems of the perforating tubing from the perspective of statics, but some research results are not applicable. As the initial output unit of the explosion impact load, the damage form, strength and deformation of the perforating tubing under the perforating impact are still unclear. Due to the complexity of the dynamic response problem of the perforating tubing, research in this area is still in its early stages, especially the lack of methods to obtain dynamic impact data of the perforating tubing. At present, it is difficult to obtain impact data of the perforating tubing, whether by theoretical analysis or indoor test methods. However, the field measured data is often very limited, and usually only the perforating pressure data can be obtained, which cannot provide effective data for the safety and reliability assessment of the perforating tubing.

[0003] In recent years, thanks to the vigorous development of modern computer technology, finite element numerical simulation calculations have become one of the most effective research methods for complex nonlinear problems such as perforating strings. The research on perforation has entered the stage of large-scale finite element simulation, and the use of simulation methods to study the dynamic mechanical problems of perforating strings is very convenient and can also achieve relatively ideal results. In particular, with the help of large servers to carry out numerical simulation calculations, on the one hand, the dynamic response process of the string under the action of explosive impact load under perforating conditions can be clearly presented. On the other hand, the extraction of dynamic mechanical data of the string under perforating conditions is very flexible and convenient, and various dynamic physical variables of different operating conditions, different string parts and different times can be effectively obtained, and then the safety and reliability evaluation analysis can be carried out. Therefore, it is necessary to explore and form a set of methods and systems that can effectively obtain dynamic impact data of downhole perforating strings based on finite element simulation calculation methods. Summary of the invention

[0004] The purpose of the present invention is to provide a method and system for obtaining dynamic impact data of a tubing string under perforating conditions in order to solve the above-mentioned problem.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A method for obtaining dynamic impact data of a pipe string under perforating conditions comprises the following steps:

[0007] According to the actual operating conditions of the perforating string, a three-dimensional finite element simulation calculation model of the perforating string is established, and numerical simulation calculation of the dynamic impact of the perforating string under perforating conditions is carried out;

[0008] According to the numerical simulation calculation results of the dynamic impact of the perforating string, the perforating string equivalent stress change cloud diagram is drawn to analyze the change of the perforating string equivalent stress;

[0009] According to the change of equivalent stress of the perforating string, the dynamic impact of the perforating string is analyzed;

[0010] According to the dynamic impact of the perforating string, determine the external load conditions of the perforating string;

[0011] According to the external load conditions on the perforating string, the dynamic impact load data of the perforating string is obtained.

[0012] As a further optimization scheme of the present invention, according to the actual operating conditions of the perforating string, a three-dimensional finite element simulation calculation model of the perforating string is established, and the specific process of carrying out the numerical simulation calculation of the dynamic impact of the perforating string under the perforating condition is as follows:

[0013] Based on the actual operating conditions of the perforating string, the wellbore perforating system is simplified to obtain a simplified wellbore perforating system.

[0014] Based on the simplified wellbore perforating system, a three-dimensional finite element simulation model of the perforating string is established;

[0015] Based on the three-dimensional finite element simulation calculation model of the perforating string, the numerical simulation calculation of the dynamic impact of the perforating string is carried out.

[0016] As a further optimization solution of the present invention, the simplified wellbore perforating system includes a perforating section, a tubing section and a bottom hole space.

[0017] As a further optimization scheme of the present invention, according to the numerical simulation calculation results of the dynamic impact of the perforating string, a cloud diagram of the equivalent stress change of the perforating string is drawn, and the specific process of analyzing the change of the equivalent stress of the perforating string is as follows:

[0018] According to the numerical simulation calculation results of the dynamic impact of the perforating string, draw the perforating string equivalent stress change cloud diagram;

[0019] According to the perforating string equivalent stress variation cloud diagram, the variation characteristics of the perforating string equivalent stress and the distribution characteristics of the perforating string at different positions are analyzed.

[0020] As a further optimization scheme of the present invention, according to the change of equivalent stress of the perforating string, the specific process of analyzing the dynamic impact of the perforating string is as follows:

[0021] According to the change of equivalent stress of the perforating string, determine the vulnerable parts of the perforating string;

[0022] According to the vulnerable parts of the perforating string, the curve of equivalent stress variation with time of the perforating string is extracted;

[0023] According to the time-varying curve of equivalent stress of the perforating string, the dynamic impact characteristics of the perforating string are analyzed and obtained.

[0024] As a further optimization scheme of the present invention, the specific process of determining the external load conditions of the perforating string according to the dynamic impact of the perforating string is as follows:

[0025] According to the dynamic impact of the perforating string, the annular pressure of the tubing section is used as the external load to load and obtain the change of the annular pressure of the tubing section;

[0026] According to the annular pressure changes of the tubing section, draw the annular pressure cloud diagram of the perforated tubing section;

[0027] According to the annular pressure cloud diagram of the perforated tubing section, the characteristic data of the annular pressure change of the perforated tubing section is analyzed and obtained.

[0028] As a further optimization scheme of the present invention, according to the external load conditions of the perforating string, the specific process of obtaining the dynamic impact load data of the perforating string is as follows:

[0029] According to the external load conditions of the perforating string, the characteristic data of the annular pressure change of the perforated tubing section is analyzed;

[0030] According to the analysis results of the annular pressure data of the perforated tubing section, the peak distribution characteristics of the external load of the perforated tubing string are obtained;

[0031] According to the peak distribution characteristics of the external load of the perforating string, the dynamic impact load data of the perforating string is analyzed and obtained.

[0032] A system for obtaining dynamic impact data of a pipe string under perforating conditions, comprising:

[0033] The model building module is used to establish a three-dimensional finite element simulation calculation model of the perforating string according to the actual operating conditions of the perforating string, and to carry out numerical simulation calculation of the dynamic impact of the perforating string under the perforating conditions;

[0034] The equivalent stress analysis module is used to draw the equivalent stress change cloud diagram of the perforating string according to the numerical simulation calculation results of the dynamic impact of the perforating string, and analyze the change of the equivalent stress of the perforating string;

[0035] Impact analysis module, used to analyze the dynamic impact of the perforating string according to the change of equivalent stress of the perforating string;

[0036] The external load analysis module is used to determine the external load conditions of the perforating string according to the dynamic impact of the perforating string;

[0037] The impact load data calculation module is used to obtain the dynamic impact load data of the perforating string according to the external load conditions of the perforating string.

[0038] An electronic device comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus;

[0039] Memory, for storing computer programs;

[0040] The processor is used to implement a method for obtaining dynamic impact data of a pipe string under a perforating condition when executing a program stored in the memory.

[0041] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements a method for obtaining dynamic impact data of a tubular string under a perforating condition.

[0042] The beneficial effects of the present invention are:

[0043] The present invention is based on numerical simulation calculation. By extracting the dynamic impact data of the perforating string and analyzing the dynamic data in combination with the cloud map, the purpose is to obtain the number of dynamic impacts on the perforating string. At the same time, the peak perforating pressure of the outer annulus of the perforating string system is used as its own external load, and the size of the extracted pressure peak value corresponding to the number of perforating impacts is discussed for the distribution of the pressure peak data of the perforating string subjected to external impacts. The above numerical simulation method can accurately obtain the dynamic data of the perforating string subjected to impact, and provide a data basis for further analysis of the dynamic damage problem of the perforating string. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A schematic diagram of a specific process of the method for obtaining dynamic impact data of a pipe string under perforating conditions provided by the present invention;

[0045] Figure 2 A schematic diagram of a three-dimensional simulation calculation model of a perforating string provided by the present invention;

[0046] Figure 3 A cloud diagram of the simulated equivalent stress variation of the perforating string provided by the present invention;

[0047] Figure 4 A schematic diagram of a curve showing a change in equivalent stress of a perforating string over time provided by the present invention;

[0048] Figure 5 A schematic diagram of peak distribution data of external load pressure of the perforating string provided by the present invention;

[0049] Figure 6 It is a structural block diagram of the system provided by the present invention;

[0050] Figure 7 It is a structural block diagram of the device provided by the present invention. DETAILED DESCRIPTION

[0051] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0052] like Figure 1 As shown, a method for obtaining dynamic impact data of a pipe string under perforating conditions includes steps S1 to S5, wherein:

[0053] In step S1, according to the actual operating conditions of the perforating string, a three-dimensional finite element simulation calculation model of the perforating string is established, and a dynamic impact simulation calculation of the string under the perforating condition is carried out;

[0054] In step S2, according to the simulation calculation results of the perforating string, a cloud diagram of the equivalent stress change of the perforating string is drawn to analyze the change of the equivalent stress of the perforating string;

[0055] In step S3, the dynamic impact of the perforating string is analyzed according to the change of the equivalent stress of the perforating string;

[0056] In step S4, the external load condition of the perforating string is determined according to the dynamic impact condition of the perforating string;

[0057] In step S5, according to the external load conditions on the perforating string, the dynamic impact load data of the perforating string is obtained and the data is analyzed.

[0058] In the embodiment of the present invention, firstly, based on the actual operation condition of the perforating string, the wellbore perforating system is simplified, a three-dimensional perforating string simulation calculation model in the wellbore is established, and the dynamic impact numerical simulation calculation of the perforating string is performed; then, according to the numerical simulation result of the dynamic impact of the perforating string, a cloud diagram of the equivalent stress change of the perforating string is drawn, and the characteristics of the change of the equivalent stress of the perforating string and the distribution characteristics of different positions of the perforating string are analyzed; then, according to the change of the equivalent stress of the perforating string, the vulnerable parts of the perforating string under impact are determined, the time variation curve of the equivalent stress of the perforating string is extracted, and the dynamic impact characteristics of the perforating string are analyzed; then, according to the dynamic impact of the perforating string, the annular pressure of the oil pipe section is used as the external load for loading, the annular pressure cloud diagram of the perforating oil pipe section is drawn, and the characteristics of the change of the annular pressure of the perforating oil pipe section are analyzed; finally, according to the external load conditions of the perforating string, the annular pressure data of the perforating oil pipe section is analyzed, and based on the data analysis results, the peak distribution characteristics of the external load of the perforating string are analyzed to obtain the dynamic impact load data of the perforating string. The above steps constitute a complete and effective method for obtaining dynamic impact data of the tubing string under perforating conditions.

[0059] Step S1, according to the actual operating conditions of the perforating string, a three-dimensional finite element simulation calculation model of the perforating string is established, and a dynamic impact simulation calculation of the string under the perforating condition is carried out. The specific method is as follows:

[0060] The actual operating environment of the perforating string is harsh, especially under the impact of the explosion of the perforating bullet, the perforating string will suffer dynamic damage. Due to the complexity of the dynamic problems of the perforating string, when conducting simulation calculations for the dynamic impact of the perforating string, it is necessary to reasonably simplify the perforating system in the wellbore: for the specific tubing section with the packer, the structures of the various components of the perforating string are made homogeneous, and the joints and other parts are ignored. According to the on-site matching specifications, the simplified perforating string is mainly divided into the perforating section, the tubing section and the bottom hole space.

[0061] Based on the simplified wellbore perforating system mentioned above, a three-dimensional perforating string simulation calculation model in the wellbore is established according to the actual working conditions on site, taking into account the perforating gun, perforating string dimensions and related working environment parameters. Figure 2 As shown in the figure. In the above numerical calculation model, the perforating gun, perforating bullet, wellbore fluid, oil pipe, etc. are mainly included. Among them, the Lagrange algorithm is used to establish the calculation grid for the perforating string structure, and the ALE algorithm is used to establish the calculation grid for the perforating bullet and liquid structures. In particular, the perforating bullet explosive area needs to adopt local grid encryption.

[0062] Based on the finite element simulation calculation model established above, the dynamic impact numerical simulation calculation of the perforating string is carried out by reasonably selecting the constitutive equation, setting the material model parameters, etc. Among them, the complete simulation model is imported into the finite element software for solution, and the relevant calculation parameters are defined, such as explosion time, explosion point, calculation time, time step, etc., to ensure the smooth implementation of the finite element simulation calculation of the dynamic impact of the perforating string and the convergence of the numerical simulation calculation.

[0063] Step S2, according to the simulation calculation result of the perforating string described in step S1, draw a perforating string equivalent stress change cloud diagram, and analyze the perforating string equivalent stress change. The specific method is as follows:

[0064] Based on the above numerical simulation results of the dynamic impact of the perforating string, a large number of calculations are carried out on a large server. After the calculation is completed, a cloud map of the numerical simulation calculation results can be obtained, which shows the dynamic impact process of the perforating string intuitively. By adjusting different viewing angles, the dynamic changes of the entire perforating string are displayed, and the cloud map of the combined displacement change of the string at different times during the perforating process is drawn. The unit system is cm-g-μs, such as Figure 3 As shown in the figure, the initial time is 800μs, and a result cloud chart is generated every 200μs, with the unit being 105MPa.

[0065] According to the cloud diagram of the equivalent stress variation of the perforating string, the equivalent stress variation of the perforating string has a periodic characteristic. The bottom, middle and top of the perforating string respond in sequence. At the top, the maximum equivalent stress peak appears due to the reflection of the shock wave at the fixed end.

[0066] The bottom of the perforating string is subjected to the impact of the explosion, and the equivalent stress concentration phenomenon occurs locally. As the impact load of the explosion propagates along the perforating string to the top, a reflection occurs at the top of the perforating string, i.e., the packer, and the equivalent stress at the top of the perforating string increases rapidly. The reflected perforating shock wave changes and propagates toward the bottom of the perforating string, and superimposes with the subsequent explosion impact near the middle and lower part of the perforating string, and the equivalent stress concentration phenomenon in a small range occurs again.

[0067] Step S3, according to the change of equivalent stress of the perforating string described in step S2, the dynamic impact of the perforating string is analyzed, and the specific method is as follows:

[0068] According to the change of equivalent stress of the perforating string, the maximum equivalent stress peak appears at the top of the perforating string, i.e., the position of the packer. The vulnerable part of the perforating string is determined, which needs to be used as a reference point for subsequent analysis and data extraction.

[0069] According to the vulnerable parts of the perforating string, the equivalent stress variation curve over time is extracted at the top of the perforating string in the form of a structural block (Part), such as Figure 4The equivalent stress time of the perforating string varies from 0 to 5000 μs, and the dotted line represents the yield strength limit of the perforating string itself, 536 MPa.

[0070] According to the curve of the change of equivalent stress of the perforating string over time, the dynamic impact characteristics of the perforating string are analyzed: when the equivalent stress of the perforating string exceeds its own yield strength limit of 536MPa, the perforating string begins to enter the dynamic damage stage. Each peak on the equivalent stress data curve of the perforating string means that the perforating string itself is subjected to a dynamic impact, and the total number of dynamic impacts on the perforating string is 38 times. In the time period from 0 to 3700μs, the peak value of the equivalent stress at the top of the perforating string is always lower than its own yield strength limit of 536MPa; from 3700μs, the peak value of the equivalent stress of the perforating string begins to exceed its own yield strength limit of 536MPa, and the perforating string begins to enter the dynamic damage stage.

[0071] Step S4, according to the dynamic impact of the perforating string in step S3, the external load condition of the perforating string is determined, and the specific method is as follows:

[0072] According to the dynamic impact of the perforating string, on the basis of obtaining the dynamic impact equivalent stress change data of the perforating string, it is necessary to extract the external load data of the perforating string at the moment of perforating impact. According to the above analysis, the impact of the perforating string is clarified. In order to analyze the external load loading of the perforating string more deeply, it is necessary to load the annular pressure of the oil pipe section as the external load of the string at the moment of each impact.

[0073] The above numerical simulation calculation can be used to obtain the annular perforating fluid pressure change cloud map. At the same time, the perforating pressure data is extracted from the annular fluid of the oil pipe section according to the unit as the external load of the perforating string.

[0074] According to the annular pressure cloud map of the perforated tubing section, the annular pressure change characteristics of the perforated tubing section are analyzed. It can be seen that the shock wave generated by the explosion of the perforating bullet propagates into the annular space of the tubing section, causing its pressure to increase, and the pressure in the unaffected areas does not change. As the perforating shock wave reaches the top of the tubing section, reflection will also occur. The reflected shock wave increases rapidly and changes direction to propagate in the opposite direction of the bottom of the well.

[0075] Step S5, according to the external load conditions of the perforating string as described in step S4, the dynamic impact load data of the perforating string is obtained, and the data is analyzed. The specific method is as follows:

[0076] According to the external load conditions of the perforating string, the annular pressure data of the perforated tubing section is analyzed, such as Figure 5Among them, the annular pressure peak value of 0-10MPa in the outer tubing section of the perforated string has impacted 3 times; the annular pressure peak value of 10-20MPa in the outer tubing section of the perforated string has impacted 6 times; the annular pressure peak value of 20-30MPa in the outer tubing section of the perforated string has impacted 8 times; the annular pressure peak value of 30-40MPa in the outer tubing section of the perforated string has impacted 7 times; the annular pressure peak value of 40-50MPa in the outer tubing section of the perforated string has impacted 3 times; the annular pressure peak value of 50-60MPa in the outer tubing section of the perforated string has impacted 1 time.

[0077] According to the analysis results of the annular pressure data of the oil pipe section, the peak distribution characteristics of the external load of the perforating string are analyzed: the peak distribution of the external load of the perforating string conforms to the normal distribution, and the average value, standard deviation and corresponding frequency of impact times of the peak external load of the perforating string can be calculated.

[0078] According to the change of equivalent stress of the perforating string under the impact of explosion and the peak distribution characteristics of the external load of the perforating string, the dynamic impact load data of the perforating string is acquired.

[0079] The technical solution of the present invention conducts an in-depth analysis of the dynamics of the tubing string under perforating conditions, establishes a three-dimensional finite element simulation calculation model of the perforating tubing string in the wellbore, conducts dynamic impact simulation calculations of the tubing string under perforating conditions, obtains a cloud map of equivalent stress changes of the perforating tubing string, and analyzes the dynamic impact of the perforating tubing string based on the changes in the equivalent stress of the perforating tubing string, determines the external load conditions of the perforating tubing string, obtains dynamic impact load data of the perforating tubing string and performs data analysis. In summary, a set of accurate, effective and convenient methods for obtaining dynamic impact data of the tubing string under perforating conditions is formed, which provides a data basis for in-depth research on the dynamic response of the tubing string under the impact of perforating explosion loads, is of great significance for solving the safety and reliability problems of the perforating tubing string under field operation conditions, can provide an important reference for obtaining downhole dynamic data in the field of oil and gas well perforation, and is of great reference significance for the extraction of dynamic data under similar explosion impact conditions.

[0080] like Figure 6 As shown, an embodiment of the present disclosure provides a system for obtaining dynamic impact data of a tubular string under a perforating condition, comprising:

[0081] The model building module 11 is used to establish a three-dimensional finite element simulation calculation model of the perforating string according to the actual operating conditions of the perforating string, and to carry out numerical simulation calculation of dynamic impact of the perforating string under the perforating conditions;

[0082] The equivalent stress analysis module 12 is used to draw a cloud diagram of equivalent stress changes in the perforating string according to the numerical simulation calculation results of the dynamic impact of the perforating string, and analyze the changes in the equivalent stress of the perforating string;

[0083] The impact analysis module 13 is used to analyze the dynamic impact of the perforating string according to the change of the equivalent stress of the perforating string;

[0084] The external load analysis module 14 is used to determine the external load conditions of the perforating string according to the dynamic impact of the perforating string;

[0085] The impact load data calculation module 15 is used to obtain the dynamic impact load data of the perforating string according to the external load conditions on the perforating string.

[0086] The implementation process of the functions and effects of each module in the above system is specifically described in the implementation process of the corresponding steps in the above method, which will not be repeated here.

[0087] For the system embodiment, since it basically corresponds to the method embodiment, the relevant parts can refer to the partial description of the method embodiment. The system embodiment described above is only schematic, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of the present invention. Those of ordinary skill in the art can understand and implement it without paying creative labor.

[0088] In the above-mentioned embodiment, any multiple of all modules can be combined in one module for implementation, or any one of the modules can be split into multiple modules. Alternatively, at least some functions of one or more of these modules can be combined with at least some functions of other modules and implemented in one module. At least one of all modules can be at least partially implemented as a hardware circuit, such as a field programmable gate array (FPGA), a programmable logic array (PLA), a system on a chip, a system on a substrate, a system on a package, an application specific integrated circuit (ASIC), or can be implemented by hardware or firmware such as any other reasonable way of integrating or packaging the circuit, or implemented in any one of the three implementation modes of software, hardware and firmware or in a suitable combination of any of them. Alternatively, at least one of all modules can be at least partially implemented as a computer program module, and when the computer program module is run, the corresponding function can be executed.

[0089] See also Figure 7 , an electronic device provided by an embodiment of the present disclosure includes a processor 1110, a communication interface 1120, a memory 1130 and a communication bus 1140, wherein the processor 1110, the communication interface 1120, and the memory 1130 communicate with each other through the communication bus 1140;

[0090] Memory 1130, for storing computer programs;

[0091] The processor 1110 is used to implement the method for obtaining dynamic impact data of the tubing string under the perforating condition as shown below when executing the program stored in the memory 1130.

[0092] The communication bus 1140 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus 1140 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0093] The communication interface 1120 is used for communication between the above electronic device and other devices.

[0094] The memory 1130 may include a random access memory (RAM) or a non-volatile memory, such as at least one disk memory. Optionally, the memory 1130 may also be at least one storage device located away from the processor 1110.

[0095] The above-mentioned processor 1110 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.

[0096] The embodiment of the present disclosure further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for obtaining dynamic impact data of a tubular string under perforating conditions as described above is implemented.

[0097] The computer-readable storage medium may be included in the device / apparatus described in the above embodiment; or it may exist independently without being assembled into the device / apparatus. The above computer-readable storage medium carries one or more programs. When the above one or more programs are executed, the method for obtaining dynamic impact data of the tubing string under perforating conditions according to the embodiment of the present disclosure is implemented.

[0098] According to an embodiment of the present disclosure, a computer-readable storage medium may be a non-volatile computer-readable storage medium, for example, may include but is not limited to: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, apparatus, or device.

[0099] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A method for obtaining dynamic impact data of a pipe string under perforating conditions, characterized in that: The following steps are involved: According to the actual operating conditions of the perforating string, a three-dimensional finite element simulation calculation model of the perforating string is established, and numerical simulation calculation of the dynamic impact of the perforating string under perforating conditions is carried out; According to the numerical simulation calculation results of the dynamic impact of the perforating string, the perforating string equivalent stress change cloud diagram is drawn to analyze the change of the perforating string equivalent stress; According to the change of equivalent stress of the perforating string, the dynamic impact of the perforating string is analyzed; According to the dynamic impact of the perforating string, determine the external load conditions of the perforating string; According to the external load conditions on the perforating string, the dynamic impact load data of the perforating string is obtained.

2. The method for obtaining dynamic impact data of a pipe string under perforating conditions according to claim 1, characterized in that: According to the actual operating conditions of the perforating string, a three-dimensional finite element simulation calculation model of the perforating string is established, and the specific process of carrying out the numerical simulation calculation of the dynamic impact of the perforating string under the perforating condition is as follows: Based on the actual operating conditions of the perforating string, the wellbore perforating system is simplified to obtain a simplified wellbore perforating system. Based on the simplified wellbore perforating system, a three-dimensional finite element simulation model of the perforating string is established; Based on the three-dimensional finite element simulation calculation model of the perforating string, the numerical simulation calculation of the dynamic impact of the perforating string is carried out.

3. The method for obtaining dynamic impact data of a pipe string under perforating conditions according to claim 2, characterized in that: The simplified wellbore perforating system comprises a perforating section, a tubing section and a bottom hole space.

4. The method for obtaining dynamic impact data of a pipe string under perforating conditions according to claim 2, characterized in that: According to the numerical simulation calculation results of the dynamic impact of the perforating string, the cloud diagram of the equivalent stress change of the perforating string is drawn, and the specific process of analyzing the change of the equivalent stress of the perforating string is as follows: According to the numerical simulation calculation results of the dynamic impact of the perforating string, draw the perforating string equivalent stress change cloud diagram; According to the perforating string equivalent stress variation cloud diagram, the variation characteristics of the perforating string equivalent stress and the distribution characteristics of the perforating string at different positions are analyzed.

5. The method for obtaining dynamic impact data of a pipe string under perforating conditions according to claim 1, characterized in that: According to the change of equivalent stress of the perforating string, the specific process of analyzing the dynamic impact of the perforating string is as follows: According to the change of equivalent stress of the perforating string, determine the vulnerable parts of the perforating string; According to the vulnerable parts of the perforating string, the curve of equivalent stress variation with time of the perforating string is extracted; According to the time-varying curve of equivalent stress of the perforating string, the dynamic impact characteristics of the perforating string are analyzed and obtained.

6. The method for obtaining dynamic impact data of a pipe string under perforating conditions according to claim 1, characterized in that: According to the dynamic impact of the perforating string, the specific process of determining the external load conditions of the perforating string is as follows: According to the dynamic impact of the perforating string, the annular pressure of the tubing section is used as the external load to load and obtain the change of the annular pressure of the tubing section; According to the annular pressure changes of the tubing section, draw the annular pressure cloud diagram of the perforated tubing section; According to the annular pressure cloud diagram of the perforated tubing section, the characteristic data of the annular pressure change of the perforated tubing section is analyzed and obtained.

7. The method for obtaining dynamic impact data of a pipe string under perforating conditions according to claim 1, characterized in that: According to the external load conditions of the perforating string, the specific process of obtaining the dynamic impact load data of the perforating string is as follows: According to the external load conditions of the perforating string, the characteristic data of the annular pressure change of the perforated tubing section is analyzed; According to the analysis results of the annular pressure data of the perforated tubing section, the peak distribution characteristics of the external load of the perforated tubing string are obtained; According to the peak distribution characteristics of the external load of the perforating string, the dynamic impact load data of the perforating string is analyzed and obtained.

8. A system for obtaining dynamic impact data of a pipe string under perforating conditions, characterized in that: include: The model building module is used to establish a three-dimensional finite element simulation calculation model of the perforating string according to the actual operating conditions of the perforating string, and to carry out numerical simulation calculation of the dynamic impact of the perforating string under the perforating conditions; The equivalent stress analysis module is used to draw the equivalent stress change cloud diagram of the perforating string according to the numerical simulation calculation results of the dynamic impact of the perforating string, and analyze the change of the equivalent stress of the perforating string; The impact analysis module is used to analyze the dynamic impact of the perforating string according to the change of the equivalent stress of the perforating string; The external load analysis module is used to determine the external load conditions of the perforating string according to the dynamic impact of the perforating string; The impact load data calculation module is used to obtain the dynamic impact load data of the perforating string according to the external load conditions of the perforating string.

9. An electronic device, characterized in that: It includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; Memory, for storing computer programs; The processor is used to implement the method for obtaining dynamic impact data of a tubing string under perforating conditions as described in any one of claims 1 to 7 when executing the program stored in the memory.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for obtaining dynamic impact data of a tubing string under perforating conditions described in any one of claims 1 to 7 is implemented.

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