Parameter measurement method and system for resonance damage casing-cement sheath cementing surface

Abstract

The invention belongs to the technical field of workover treatment, and relates to a method for measuring parameters of a casing-cement sheath cementing surface damaged by resonance, which comprises the following steps of: respectively acquiring the multi-order inherent frequency, the position of a resonance excitation point and the applied excitation acceleration of a casing system and a casing-cement sheath system; performing resonance loading on the casing system and the casing-cement sheath system according to the multi-order inherent frequency of the casing system and the casing-cement sheath system, the position of the resonance excitation point and the applied excitation acceleration; evaluating the resonance loading effect, and judging whether interface separation of the casing-cement sheath system occurs on the cementing surface or not; and outputting resonance parameters of the casing-cement sheath system. According to the method provided by the invention, effective resonance of the casing-cement sheath system can be realized in the actual workover operation, reliable evaluation of the actual effect of the damage degree of the cement sheath after resonance excitation is realized, and resonance technical parameters which can be directly used in the actual field workover operation are formulated.

Description

Technical Field

[0001] The invention belongs to the technical field of well repair operations, and particularly relates to a parameter measurement method and system for resonance-damaged casing-cement ring bonding surfaces. Background Art

[0002] During the well repair operation, in order to remove the lowered casing, it is necessary to destroy the bonding between the casing and the cement ring outside the casing, or even break the cement ring. In the existing cement ring breaking technology, the following methods are generally used: (1) a special tool is lowered into the casing. After the tool expands, it transfers the expansion load to the cement ring by squeezing the casing, thereby destroying the bonding structure; (2) a vibration tool is lowered into the casing, and a vibration load is applied to the cement ring through the casing, thereby destroying the bonding structure. Method (1) can easily cause the casing to deform or even be crushed, making it difficult to remove the casing; the vibration parameters of method (2), especially the resonance parameters, are difficult to obtain, and it is difficult to achieve casing resonance, and the cement ring breaking effect is average. In other words, the above method does not determine the multi-order natural frequencies of the casing, so it is likely that it is difficult to excite the coordinated vibration of the casing, and the vibration load transmission to the cement ring is not obvious.

[0003] In addition, in the actual operation process, the outer cement ring of the casing fits tightly with the casing during the cementing stage, and the vibration of the casing is limited. Therefore, it is not sufficient to only consider the resonance of the casing. It is necessary to regard the casing and the cement ring as a whole, and provide data support for the resonance exciter by measuring the multi-order natural frequency (resonance frequency) of the whole. Summary of the invention

[0004] In view of the above problems, the technical solution adopted by the present invention is as follows: a method for measuring parameters of a resonance-damaged casing-cement sheath bonding surface, the method comprising the following steps:

[0005] The multi-order natural frequencies, the positions of the resonance excitation points and the applied excitation accelerations of the casing system and the casing-cement sheath system are obtained respectively;

[0006] Resonant loading is performed on the casing system and the casing-cement sheath system according to the multi-order natural frequencies of the casing system and the casing-cement sheath system, the positions of the resonance excitation points and the applied excitation acceleration;

[0007] Evaluate the resonance loading effect and determine whether the interface separation of the casing-cement sheath system occurs at the cementing surface;

[0008] Output the resonance parameters of the casing-cement sheath system.

[0009] Furthermore, obtaining the multi-order natural frequencies, the positions of the excitation points and the excitation acceleration of the casing system includes:

[0010] A casing finite element model is established according to the steel grade, length, inner diameter and outer diameter of the casing. The multi-order natural frequencies of the casing system, the position of the resonance excitation point and the applied excitation acceleration are obtained according to the finite element calculation by the finite element modal analysis method.

[0011] The parameters are set based on the multi-order natural frequencies of the casing system obtained by finite element calculation, and the multi-order natural frequencies of the casing system are measured by experimental method;

[0012] The multi-order natural frequencies of the casing system measured by the experimental method are input into the finite element simulation software again to calibrate the position of the resonance excitation point and the applied excitation acceleration obtained by the finite element calculation, so as to obtain the precise position of the resonance excitation point and the applied excitation acceleration of the casing system.

[0013] Furthermore, obtaining the multi-order natural frequencies, the positions of the excitation points and the excitation acceleration of the casing-cement sheath system includes:

[0014] According to the cement sheath wall thickness, the inner diameter and the outer diameter of the casing-cement sheath system, a casing string-cement sheath finite element model is established. Through the finite element modal analysis method, the multi-order natural frequencies of the casing-cement sheath system, the position of the resonance excitation point and the applied excitation acceleration are obtained according to the finite element calculation;

[0015] The parameters are set based on the multi-order natural frequencies of the casing-cement sheath system obtained by finite element calculation, and the multi-order natural frequencies of the casing-cement sheath system are measured by experimental method;

[0016] The multi-order natural frequencies of the casing-cement ring system measured by the experimental method are input into the finite element simulation software again to calibrate the position of the resonance excitation point and the applied excitation acceleration obtained by the finite element calculation, so as to obtain the precise position of the resonance excitation point and the applied excitation acceleration of the casing-cement ring system.

[0017] Further, resonant loading of the casing system according to the multi-order natural frequencies of the casing system, the position of the resonant excitation point and the applied excitation acceleration comprises:

[0018] According to the multi-order natural frequencies of the casing system, the positions of the resonance excitation points and the applied excitation acceleration, the different excitation point positions of the excitation points on the inner wall of the casing in the casing system are determined, and multiple excitation point positions are loaded individually or simultaneously to excite the resonance of the casing system; when the resonance cycle reaches the specified cycle number, the loading is stopped.

[0019] Furthermore, the loading conditions are set as follows: the loading acceleration is the same as the excitation acceleration applied by the casing system and is freely adjustable within the range of 0.5 to 10 g; the excitation frequency is the same as the multi-order natural frequency of the casing system or the casing-cement sheath system and is freely adjustable within the range of 1 to 3 orders; the resonance time is specified according to the cycle number and is set within 104 ~10 5 Freely adjustable within the cycle range.

[0020] Further, the resonant loading of the casing-cement ring system according to the multi-order natural frequencies of the casing-cement ring system, the position of the resonant excitation point and the applied excitation acceleration includes:

[0021] According to the multi-order natural frequencies of the casing-cement ring system, the positions of the resonance excitation points and the applied excitation acceleration, the different excitation point positions at the inner wall of the casing in the casing-cement ring system, as well as the corresponding positions of the cement ring end and the outer wall are determined, and multiple excitation point positions are loaded simultaneously to excite the resonance of the casing-cement ring system; when the resonance cycle reaches the specified cycle number, the loading is stopped.

[0022] Furthermore, the loading conditions are set as follows: the loading acceleration is the same as the excitation acceleration applied by the casing-cement sheath system and is freely adjustable within the range of 0.5 to 10 g; the excitation frequency is the same as the multi-order natural frequency of the casing-cement sheath system and is freely adjustable within the range of 1 to 3 orders; the resonance time is specified according to the cycle number and is set within 10 4 ~10 5 Freely adjustable within the cycle range.

[0023] Furthermore, the resonance loading effect is evaluated to determine whether interface separation of the casing-cement sheath system occurs on the cementing surface:

[0024] Check the integrity of the cementing surface of the casing-cement sheath system and determine whether the interface separation of the casing-cement sheath system occurs on the cementing surface;

[0025] If interface separation occurs, pull out the casing and record the load at the time of pulling out;

[0026] If interface separation does not occur, the casing-cement sheath system and the casing system are continuously subjected to resonance loading.

[0027] Furthermore, the resonance parameters of the output casing-cement ring system include:

[0028] Output casing pull-out load and optimal excitation point position, optimal excitation acceleration, optimal excitation frequency and optimal cycle number of casing string-cement ring system.

[0029] In addition, the present invention also proposes a parameter measurement system for resonance-damaged casing-cement sheath bonding surface, the system comprising an acquisition module, a resonance loading module, an evaluation module and an output module; wherein,

[0030] The acquisition module is used to respectively acquire the multi-order natural frequencies, the positions of the resonance excitation points and the applied excitation acceleration of the casing system and the casing-cement sheath system;

[0031] The resonance loading module is used to resonantly load the casing system and the casing-cement sheath system according to the multi-order natural frequencies of the casing system and the casing-cement sheath system, the positions of the resonance excitation points and the applied excitation acceleration;

[0032] The evaluation module is used to evaluate the resonance loading effect and determine whether the interface separation of the casing-cement sheath system occurs on the cementing surface;

[0033] The output module is used to output the resonance parameters of the casing-cement sheath system.

[0034] The present invention regards the casing and cement ring as an integral system and formulates resonance parameters based on the system as a unit; adopts a comprehensive measurement method using finite element modal analysis and measuring instruments such as an excitation hammer to determine the multi-order natural frequencies, excitation point positions and excitation accelerations of the casing-cement ring system; in the process of destroying the casing-cement ring bonding surface through resonance loading, the inner wall of the casing is not struck by the amplitude generated by the resonance of the excitation device itself to transmit the vibration load, but the resonance of the casing-cement ring system is achieved.

[0035] Compared with the prior art, the method proposed in the present invention can realize effective resonance of the casing-cement ring system in actual well repair operations, and realize reliable evaluation of the actual effect of the degree of cement ring damage after resonance excitation, and formulate resonance technical parameters that can be directly used in actual on-site well repair operations, including output casing pull-out load and the optimal excitation point position, optimal excitation acceleration, optimal excitation frequency and optimal cycle number of the casing string-cement ring system.

[0036] Other features and advantages of the present invention will be described in the following description, and part of them will become obvious from the description, or be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 A schematic diagram of a parameter measurement method for resonance-damaged casing-cement sheath bonding surface;

[0039] Figure 2a , Figure 2b They are schematic diagrams of casing cross section and casing-cement sheath cross section respectively;

[0040] Figure 3 A schematic diagram of a parameter measurement system for destroying the casing-cement sheath bonding surface. DETAILED DESCRIPTION

[0041] 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. 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.

[0042] like Figure 1 As shown, a parameter measurement method for resonance-destroying casing-cement sheath bonding surface, the method comprising the following steps: S1, respectively obtaining the multi-order natural frequencies of the casing system and the casing-cement sheath system, the positions of the resonance excitation points and the applied excitation acceleration; S2, respectively performing resonance loading on the casing system and the casing-cement sheath system according to the multi-order natural frequencies of the casing system and the casing-cement sheath system, the positions of the resonance excitation points and the applied excitation acceleration; S3, evaluating the resonance loading effect, and determining whether interface separation of the casing-cement sheath system occurs on the bonding surface; and S4, outputting the resonance parameters of the casing-cement sheath system.

[0043] The method proposed in the present invention regards the casing and cement ring as a system, determines the multi-order natural frequencies of the system through finite element modal analysis and convenient test methods, and guides the working parameters of the high-frequency excitation tool. At the same time, the present invention also provides an evaluation method for the use effect of the bonding surface resonance crushing technology in actual operations.

[0044] like Figure 2a The figure shows a schematic diagram of the cross section of the casing, wherein the z direction is the length direction of the tube, and the xy directions are two directions of the tube cross section that are perpendicular to each other. Figure 2a 1, 2, 3, and 4 are nodes taken at the 1 / 4 arc of the casing cross section, and d0 and d1 are the inner diameter and outer diameter of the casing respectively. Figure 2b The figure shows a schematic cross-sectional view of a casing-cement ring system, wherein the z direction is the length direction and the xy directions are two directions perpendicular to each other in the cross section. Figure 2b 1', 2', 3', and 4' are nodes taken at the 1 / 4 arc of the casing-cement sheath cross section, and D0 and D1 are the inner diameter and outer diameter of the casing-cement sheath, respectively.

[0045] Specifically, obtaining the multi-order natural frequencies, excitation point positions and excitation accelerations of the casing system in step S1 includes the following steps: ①, determining the steel grade of the casing system, the length of the casing, and the inner diameter d0 and outer diameter d1 of the casing; ②, establishing a finite element model of the casing system, selecting a node for each 1 / 4 arc according to symmetry, that is, Figure 2a The positions of points 1, 2, 3, and 4 in the figure are obtained by modal analysis and finite element calculation to obtain the rough multi-order natural frequencies (f1, f2...f n , n represents the order), and according to the results of the multi-order modes, calculate the resonance amplitude and resonance acceleration under different modal orders, analyze and determine the rough position of the resonance excitation point and the applied excitation acceleration a0; ③ Based on the rough multi-order natural frequencies of the casing system obtained by the finite element calculation in step ②, formulate the test parameters for the experimental method to determine the multi-order natural frequencies of the casing system, and from the perspective of actual experiments, use instruments such as excitation hammers to determine the precise multi-order natural frequencies of the casing system. However, since the experimental method cannot obtain the position of the resonance excitation point and the magnitude of the applied excitation acceleration, it is necessary to input the precise multi-order natural frequencies obtained by the experimental method into the finite element simulation software again, calibrate the rough position of the resonance excitation point and the applied excitation acceleration a0 obtained by the finite element calculation, so as to obtain the precise position of the resonance excitation point and the applied excitation acceleration of the casing system.

[0046] Specifically, obtaining the multi-order natural frequencies, the positions of the resonance excitation points and the applied excitation acceleration of the casing-cement sheath system in step S1 includes the following steps: ①, obtaining the modal analysis results of the casing system, and using the modal analysis results of the casing system as a reference for reference evaluation of the reliability of the data results after the modal analysis of the casing-cement sheath system; ②, measuring the wall thickness of the cement sheath and the inner diameter D0 and outer diameter D1 of the casing-cement sheath system; ③, according to the relevant mechanical parameters of the cement sheath (including but not limited to density, elastic modulus, strength, etc.), selecting a node every 1 / 4 arc according to symmetry, that is, Figure 2b The positions of points 1', 2', 3', and 4' in the model are obtained by modal analysis and finite element calculation to obtain the rough multi-order natural frequencies (F1, F2, ... F N, N represents the order), and according to the results of the multi-order modes, calculate the resonance amplitude and resonance acceleration under different modal orders, analyze and determine the position of the resonance excitation point and the applied excitation acceleration A0; ④, based on the rough multi-order natural frequencies of the casing-cement ring system obtained by the finite element calculation in step ③, formulate the experimental parameters for determining the multi-order natural frequencies of the casing-cement ring system by the experimental method, and from the perspective of actual experiments, use instruments such as excitation hammers to determine the precise multi-order natural frequencies of the casing-cement ring system. However, since the experimental method cannot obtain the position of the resonance excitation point and the magnitude of the applied excitation acceleration, it is necessary to input the precise multi-order natural frequencies obtained by the experimental method into the finite element simulation software again, calibrate the rough position of the resonance excitation point and the applied excitation acceleration A0 obtained by the finite element calculation, and thus obtain the precise position of the resonance excitation point and the applied excitation acceleration of the casing-cement ring system.

[0047] In the above step S1, the casing-cement ring modal analysis step can be understood as follows: the casing-cement ring system is a composite system based on the casing string and then adding the cement ring. That is, the casing-cement ring system is composed of a casing string model and a cement ring model, and then the casing-cement ring system is subjected to finite element modal analysis.

[0048] Specifically, the resonance loading of the casing system in step S2 includes the following steps: Figure 2a As shown, different exciting point positions (p1, p2, p3...) on the inner wall of the casing in the casing system are loaded by medium frequency or high frequency exciting equipment. Here, single loading or simultaneous loading of several positions can be freely selected. The proposed loading acceleration is the applied excitation acceleration a0 obtained in step S1. In the embodiment of the present invention, a0 can be freely selected in the range of 0.5 to 10g; the exciting frequency can refer to the resonance effect of the casing-cement ring system and be selected as the multi-order natural frequency (f1 to f3) of the casing system or the multi-order natural frequency (F1 to F3) of the casing-cement ring system, in order to stimulate the resonance of the casing system. The resonance time is selected to be the same as the resonance time of the casing-cement ring system. After the resonance cycle reaches the specified cycle number, the loading is stopped.

[0049] Specifically, the resonant loading of the casing-cement ring system in step S2 includes the following steps: according to the results obtained by the finite element modal analysis in step S1, different positions (P1, P2, P3...) of the excitation point on the inner wall of the casing in the casing string-cement ring system, as well as the cement ring end (P0) and the corresponding positions (P1', P2', P3'...) of the outer wall are determined, such as Figure 2bAs shown, medium frequency or high frequency excitation equipment is used for loading. Here, multiple excitation equipment is generally placed at multiple positions such as P1, P2, P3, P1', P2', P3' for simultaneous loading. The proposed loading acceleration is consistent with the applied excitation acceleration obtained by the finite element modal analysis in step S1, and the applied excitation acceleration is adjusted. In the embodiment of the present invention, it can be freely selected within the range of 0.5 to 10g. The excitation frequency is selected as the multi-order natural frequency of the casing string-cement ring system measured in step S1, and is generally selected as 1st to 3rd order in the embodiment of the present invention. The casing string-cement ring system is stimulated to resonate, and the resonance time can be adjusted according to the resonance cycle. In the embodiment of the present invention, it can be adjusted within the range of 10 4 ~10 5 Freely select within the range, and stop loading after the resonance cycle reaches the specified cycle number;

[0050] Specifically, the evaluation of the resonance loading effect in step S3 and the determination of whether the interface separation of the casing-cement sheath system occurs on the bonding surface include the following steps: (1) using ultrasound or other nondestructive testing equipment to detect the integrity of the bonding surface of the casing-cement sheath system and determine whether the interface separation of the casing-cement sheath occurs in a partial area of ​​the bonding surface; (2) when the integrity of the bonding surface is destroyed and the interface separation of the casing-cement sheath occurs, using a shackle device or other equipment to perform a casing extraction test. If the casing can be extracted, the extraction load is recorded; if the casing cannot be extracted, repeating step S2.

[0051] Specifically, outputting the resonance parameters of the casing-cement ring system in step S4 includes the following steps: according to the casing pull-out load recorded in step S3, combined with step S1 and step S2, the resonance parameters for the casing of this specification are given, specifically including the optimal excitation point position, optimal excitation acceleration, optimal excitation frequency and optimal cycle number of the casing string-cement ring system. The above resonance parameters can be directly used in actual on-site well repair operations after fine-tuning and expansion.

[0052] In addition, the present invention also proposes a parameter measurement system for resonance damage of casing-cement ring bonding surface, such as Figure 3 As shown, the system includes an acquisition module, a resonance loading module, an evaluation module and an output module; wherein the acquisition module is used to respectively acquire the multi-order natural frequencies of the casing system and the casing-cement ring system, the positions of the resonance excitation points and the applied excitation acceleration; the resonance loading module is used to resonantly load the casing system and the casing-cement ring system according to the multi-order natural frequencies of the casing system and the casing-cement ring system, the positions of the resonance excitation points and the applied excitation acceleration; the evaluation module is used to evaluate the resonance loading effect and determine whether the interface separation of the casing-cement ring system occurs on the bonding surface; the output module is used to output the resonance parameters of the casing-cement ring system.

[0053] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for measuring parameters of a resonance-damaged casing-cement sheath bonding surface, characterized in that: The method comprises the following steps: The multi-order natural frequencies, the positions of the resonance excitation points and the applied excitation accelerations of the casing system and the casing-cement sheath system are obtained respectively; Resonant loading is performed on the casing system and the casing-cement sheath system according to the multi-order natural frequencies of the casing system and the casing-cement sheath system, the positions of the resonance excitation points and the applied excitation acceleration; Evaluate the resonance loading effect and determine whether the interface separation of the casing-cement sheath system occurs at the cementing surface; Output the resonance parameters of the casing-cement sheath system.

2. The method according to claim 1, characterized in that Obtaining the multi-order natural frequencies, positions of excitation points and excitation accelerations of the casing system includes: A casing finite element model is established according to the steel grade, length, inner diameter and outer diameter of the casing. The multi-order natural frequencies of the casing system, the position of the resonance excitation point and the applied excitation acceleration are obtained according to the finite element calculation by the finite element modal analysis method. The parameters are set based on the multi-order natural frequencies of the casing system obtained by finite element calculation, and the multi-order natural frequencies of the casing system are measured by experimental method; The multi-order natural frequencies of the casing system measured by the experimental method are input into the finite element simulation software again to calibrate the position of the resonance excitation point and the applied excitation acceleration obtained by the finite element calculation, so as to obtain the precise position of the resonance excitation point and the applied excitation acceleration of the casing system.

3. The method according to claim 2, characterized in that Obtaining the multi-order natural frequencies, excitation point locations and excitation accelerations of the casing-cement sheath system includes: According to the cement sheath wall thickness, the inner diameter and the outer diameter of the casing-cement sheath system, a casing string-cement sheath finite element model is established. Through the finite element modal analysis method, the multi-order natural frequencies of the casing-cement sheath system, the position of the resonance excitation point and the applied excitation acceleration are obtained according to the finite element calculation; The parameters are set based on the multi-order natural frequencies of the casing-cement sheath system obtained by finite element calculation, and the multi-order natural frequencies of the casing-cement sheath system are measured by experimental method; The multi-order natural frequencies of the casing-cement ring system measured by the experimental method are input into the finite element simulation software again to calibrate the position of the resonance excitation point and the applied excitation acceleration obtained by the finite element calculation, so as to obtain the precise position of the resonance excitation point and the applied excitation acceleration of the casing-cement ring system.

4. The method according to claim 1, characterized in that: The resonant loading of the casing system according to the multi-order natural frequencies of the casing system, the position of the resonant excitation point and the applied excitation acceleration comprises: According to the multi-order natural frequencies of the casing system, the positions of the resonance excitation points and the applied excitation acceleration, the different excitation point positions of the excitation points on the inner wall of the casing in the casing system are determined, and multiple excitation point positions are loaded individually or simultaneously to excite the resonance of the casing system; when the resonance cycle reaches the specified cycle number, the loading is stopped.

5. The method according to claim 4, characterized in that The loading conditions are set as follows: the loading acceleration is the same as the excitation acceleration applied by the casing system and can be freely adjusted within the range of 0.5 to 10 g; the excitation frequency is the same as the multi-order natural frequency of the casing system or the casing-cement sheath system and can be freely adjusted within the range of 1 to 3 orders; the resonance time is specified according to the cycle number and is set within 10 4 ~10 5 Freely adjustable within the cycle range.

6. The method according to claim 1, characterized in that The resonant loading of the casing-cement ring system according to the multi-order natural frequencies of the casing-cement ring system, the positions of the resonant excitation points and the applied excitation acceleration comprises: determining different excitation point positions of the excitation points at the inner wall of the casing in the casing-cement ring system, and corresponding positions of the cement ring end and the outer wall according to the multi-order natural frequencies of the casing-cement ring system, the positions of the resonant excitation points and the applied excitation acceleration, loading multiple excitation point positions simultaneously, and exciting the resonance of the casing-cement ring system; and stopping the loading when the resonance cycle reaches a specified cycle number.

7. The method according to claim 6, characterized in that The loading conditions are set as follows: the loading acceleration is the same as the excitation acceleration applied to the casing-cement sheath system and can be freely adjusted within the range of 0.5 to 10 g; the excitation frequency is the same as the multi-order natural frequency of the casing-cement sheath system and can be freely adjusted within the range of 1 to 3 orders; the resonance time is specified according to the cycle number and is set within 10 4 ~10 5 Freely adjustable within the cycle range.

8. The method according to claim 7, characterized in that The resonance loading effect is evaluated to determine whether the interface separation of the casing-cement sheath system occurs on the cementing surface: Check the integrity of the cementing surface of the casing-cement sheath system and determine whether the interface separation of the casing-cement sheath system occurs on the cementing surface; If interface separation occurs, pull out the casing and record the load at the time of pulling out; If interface separation does not occur, the casing-cement sheath system and the casing system are continuously subjected to resonance loading.

9. The method according to claim 8, characterized in that The resonance parameters of the output casing-cement ring system include: the output casing pull-out load and the optimal excitation point position, optimal excitation acceleration, optimal excitation frequency and optimal cycle number of the casing string-cement ring system.

10. A parameter measurement system for resonance-damaged casing-cement sheath bonding surface, characterized in that: The system includes an acquisition module, a resonance loading module, an evaluation module and an output module; wherein, The acquisition module is used to respectively acquire the multi-order natural frequencies, the positions of the resonance excitation points and the applied excitation acceleration of the casing system and the casing-cement sheath system; The resonance loading module is used to resonate the casing system and the casing-cement sheath system according to the multi-order natural frequencies of the casing system and the casing-cement sheath system, the positions of the resonance excitation points and the applied excitation acceleration; The evaluation module is used to evaluate the resonance loading effect and determine whether the interface separation of the casing-cement sheath system occurs on the cementing surface; The output module is used to output the resonance parameters of the casing-cement sheath system.

Images