Deep well oil pipe rubber sealing ring positioning method, system, device and storage medium

Abstract

This application belongs to the field of intelligent operation, specifically relating to a method, system, device, and storage medium for locating rubber seals in deep well tubing. The method, through an established mathematical model, derives the relationship between the position of the rubber seal and construction parameters during cementing operations. During construction, the position of the rubber seal is estimated based on parameters obtained from actual monitoring. Furthermore, the vibration emitted by the rubber seal is monitored using fiber optic sensors to determine its real-time position. This method can be applied to deep well tubing cementing operations. This application can complete construction parameter monitoring, rubber seal position monitoring, and rubber seal bottom contact determination. By detecting vibration signals to determine the real-time position of the cementing rubber seal, engineers can more accurately and rationally control the construction process, helping to improve and refine cementing techniques, ensure downhole safety, improve cementing quality, and avoid cementing operation failures and significant economic losses.

Description

Technical Field

[0001] This application belongs to the field of intelligent operation, and in particular relates to a method, system, device and storage medium for positioning rubber sealing rings in deep well tubing. Background Technology

[0002] Cementing is a crucial component of oil and gas drilling operations. The rubber sealing rings used in cementing processes isolate cement slurry from drilling fluid during cementing, preventing the cement slurry from seeping into the drilling fluid and affecting cementing quality. For a long time, determining the position of the rubber sealing ring within the casing during oil and gas well cementing operations has been based on calculations using the cement slurry discharge rate of the mud pump, the casing's inner diameter, and volume parameters. However, factors such as the instability of the mud pump discharge rate, the U-tube effect caused by the density difference between the cement slurry inside and outside the casing and the drilling fluid, and abnormal casing diameters make it difficult to accurately determine the well depth position of the rubber sealing ring, thus affecting the high-quality completion of the meticulous cementing operation.

[0003] Analysis of the data shows that the preset retainer ring technology can only know that the rubber seal ring of the deep well tubing has reached the set well depth, but cannot know the real-time position parameters during the process of reaching the set well depth. If factors such as the failure of the shear retainer ring protrusion (or rubber plug limiting baffle), damage to the rubber seal ring, and leakage due to casing deformation occur, cementing operations may fail and cause huge economic losses. Therefore, monitoring the position of the rubber seal ring is extremely important.

[0004] Currently, there are some problems with the method of positioning rubber plugs during cementing operations:

[0005] (1) After the casing is installed, cementing begins. First, cement slurry is injected, followed by the rubber sealing ring. Displacement fluid, typically water or drilling fluid, is then introduced. The drilling fluid generally has a viscosity of around 60s, a solid content of around 10%, and a density of 1.05-2.0 g / cm³. The rubber sealing ring travels approximately 6000m within the casing. Finally, the rubber sealing ring reaches the float collar, forming a closed loop, causing a sudden pressure increase, and the cementing process is complete. The amount of displacement fluid can be precisely calculated.

[0006] In domestic cementing operations, workers rely on the total amount of injected fluid to estimate the downward position of the rubber sealing ring. This method has a large error and is prone to incomplete or empty replacement. This can either result in cement plugs remaining in the pipe, increasing the workload of drilling plugs later, or empty replacement can result in no cement slurry at the bottom of the cemented section, affecting the quality of the cementing.

[0007] (2) Cementing plugs (rubber sealing rings) are important tools and accessories in cementing operations. They are placed after pumping cement slurry and before pumping drilling fluid. The plugs serve three purposes: first, to separate cement slurry and drilling fluid to prevent cross-contamination and maintain cementing quality; second, the rubber cups on the plugs scrape cement slurry from the drill pipe and tubing inner wall; and third, to indicate the drilling fluid level. There are plug pressure seats at the designed locations in the tubing string. When the plug reaches the pressure seat, it cannot descend further, forming a seal above the plug and increasing the tubing pressure. On-site supervisors use this as a key indicator of plug placement.

[0008] However, if the cementing plug is damaged and the seal between the plug and the pressure seat is not tight, the pressure may not increase significantly after the plug is in place, affecting the judgment of the on-site engineer and posing a risk of undercut. Sometimes, during actual construction, due to sealing problems between the plug and the pressure seat or excessive construction pressure, the plug may not show a significant pressure increase after it is in place, leading to decision-making errors and undercut. Furthermore, if the plug gets stuck midway down the shaft during construction, and the tubing pressure increases even though it has not actually reached the pressure seat, it can cause misjudgment by the on-site engineer, resulting in cementing operation failure.

[0009] (3) The deep well tubing rubber sealing ring positioning method based on sonar sensor adopts an active sonar (echo sonar) sensor. The sonar emits a certain detection signal. When the signal encounters an obstacle or target on the path of propagation in the water, it is reflected back to the emission point and received. Since the target information is stored in the echo reflected back by the target, the parameters of the target can be judged and the target distance can be determined based on the received echo signal.

[0010] However, for the actual working conditions of deep well tubing cementing operations, there are significant risks to the hardware usage environment. The cementing path is complex and diverse, and the same sonar sensor solution cannot meet the needs of multiple scenarios, increasing the cost of use and reducing the stability of operation. The underground conditions are complex, with various types of metal impurities causing interference, and there are significant risks in using wireless methods to locate the rubber plug. Summary of the Invention

[0011] To address the difficulty of monitoring the position of rubber seals using traditional rubber plug positioning methods, this application aims to provide a method, system, device, and storage medium for locating rubber seals in deep well tubing. Through an established mathematical model, the relationship between the position of the rubber seal and construction parameters during cementing operations is derived. The position of the rubber seal is estimated using parameters obtained from actual monitoring during construction. Furthermore, the vibration emitted by the rubber seal is monitored using a fiber optic sensor to determine its real-time position. This method can be used for cementing operations in deep well tubing.

[0012] To achieve the above objectives, the embodiments of this application provide the following technical solutions.

[0013] In a first aspect, one embodiment of this application provides a method for positioning a rubber sealing ring in a deep well tubing, comprising:

[0014] Based on the constructed mathematical model, the relationship between the position of the rubber sealing ring and the construction parameters during cementing construction is obtained to determine whether the rubber sealing ring has touched the bottom.

[0015] Obtain the real-time monitoring parameters of the rubber seal's downward movement, and analyze the parameters to obtain the real-time position of the rubber seal.

[0016] In the deep well tubing rubber seal ring positioning method of this application, a mathematical model is established to determine the relationship between the position of the rubber seal ring and the construction parameters during cementing construction. The real-time position of the rubber seal ring is estimated by the parameters obtained from actual monitoring during construction. This application can determine the approximate position of the rubber seal ring and whether the rubber seal ring has touched the bottom by using actual construction parameter values ​​and theoretical parameter values ​​of the rubber seal ring bottoming obtained from the mathematical model. This helps to improve and perfect cementing construction technology measures, ensure downhole safety, improve cementing quality, and avoid cementing operation failure and huge economic losses.

[0017] Optionally, the method for determining whether the rubber sealing ring has touched the bottom includes:

[0018] Construct a mathematical model of the rubber sealing ring and construction parameters;

[0019] Construction parameters are monitored and obtained, and then solved using the mathematical model.

[0020] Determine if the construction parameters have changed. If they have, apply high pressure and determine if the rubber sealing ring has reached the bottom based on the pressure change. If they have not changed, continue monitoring the construction parameters.

[0021] Optionally, when determining whether the rubber sealing ring has touched the bottom, the mathematical model constructed is an Euler-Bernoulli model of the casing string established for different cementing rubber sealing rings and cementing pipes; the method for determining whether the rubber sealing ring has touched the bottom also includes:

[0022] The impact force, flow velocity, and flow rate of the casing string were derived using Newton's laws of motion. A fluid-solid coupling model of the casing string, drilling fluid, and cement slurry was established to analyze the relationship between flow velocity, flow rate, pressure, and impact vibration.

[0023] Based on the relationship between the flow velocity, flow rate, pressure and impact vibration, the frequency that maximizes the vibration displacement amplitude of the casing column structure is obtained through harmonic response analysis, which serves as the data basis for the mathematical model used to determine whether the rubber sealing ring has touched the bottom.

[0024] Optionally, the deep well tubing rubber seal positioning method further includes:

[0025] The vibration emitted by the rubber seal is monitored by a fiber optic sensor, thereby determining the real-time position of the rubber seal.

[0026] Optionally, obtaining the real-time position of the rubber seal ring based on parameter analysis includes the following steps:

[0027] A vibration generator is installed inside the rubber sealing ring, wherein the vibration generator vibrates at a fixed frequency;

[0028] An optical fiber sensor is installed on the outside of the sleeve wall to monitor vibration signals and obtain position information;

[0029] Based on the maximum frequency of vibration displacement amplitude obtained from the mathematical model, and the vibration signal emitted by the rubber sealing ring during its descent, the host computer collects and obtains the position signal of the rubber sealing ring, and demodulates the signal to obtain the real-time position of the rubber sealing ring.

[0030] Optionally, the fiber optic sensor is a dual Math-Zehnder interference structure, which consists of a light source generator, a coupler, a sensing fiber, and a photodetector. When the rubber sealing ring descends, the vibration generator inside the rubber sealing ring vibrates at a fixed frequency, and the optical cable outside the pipe wall detects the vibration by the change in interference light intensity. The computer on the ground analyzes and displays the results.

[0031] Optionally, the signal demodulation method includes:

[0032] Step 1) Signal Acquisition

[0033] Continuous acquisition of interference signal data;

[0034] Step 2) Signal preprocessing

[0035] A morphological filtering method based on elliptic template interpolation is used to denoise and polarize the original signal;

[0036] Step 3) Signal demodulation

[0037] A 3x3 coupler demodulation structure is adopted, and an elliptic fitting demodulation algorithm based on the Least Square Estimation method is used to restore the phase information of the vibration signal.

[0038] Secondly, in another embodiment provided in this application, a deep well tubing rubber sealing ring positioning system is provided, the positioning system comprising:

[0039] The data input module is used to input basic data into the interface;

[0040] The construction monitoring module includes a data acquisition and communication module and a data calibration unit, which are used to read construction parameter signals in real time and display the dynamic changes of construction parameters, compare actual construction parameters with theoretical parameter values, and display the approximate position of the rubber sealing ring estimated therefrom.

[0041] The cementing engineering database module is used to store and manage cementing design, simulation analysis, and construction monitoring data.

[0042] The report generation module is used to automatically generate construction monitoring results and to edit, modify, save, and print the output documents; and

[0043] The playback module is used to retrieve construction monitoring data from the database, replay the changes in construction parameters and downhole injection and displacement dynamic parameters, perform technical analysis on cementing operations, and summarize construction experience.

[0044] Optionally, the data input module includes a series of interface programs and a user interface for inputting and editing basic data, and deriving the corresponding theoretical values ​​of construction parameters through a mathematical model; the data input module also includes a parameter communication interface for reading cementing construction parameters in real time by detecting the parameter communication interface.

[0045] Optionally, the construction monitoring module is also used to analyze data obtained from fiber optic sensors to determine the real-time position of the rubber sealing ring.

[0046] Thirdly, in another embodiment provided in this application, a deep well tubing rubber seal ring positioning device is provided, comprising: a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other through the communication bus; the memory is used to store at least one executable instruction, wherein the executable instruction causes the processor to perform an operation corresponding to the deep well tubing rubber seal ring positioning method described in the first aspect above.

[0047] Fourthly, in another embodiment provided in this application, a storage medium is provided, wherein the storage medium stores at least one executable instruction, the executable instruction causing a processor to perform an operation corresponding to the deep well tubing rubber seal positioning method described in the first aspect above.

[0048] Compared with existing technologies, the deep well tubing rubber sealing ring positioning method, system, device, and storage medium provided in this application can achieve the following effects:

[0049] 1) Construction parameter monitoring: During the construction operation, construction parameters such as pressure value and cementing fluid volume are monitored in real time on the well.

[0050] 2) Rubber seal position monitoring: The real-time position of the cementing rubber seal is determined by detecting the vibration signal emitted by the rubber seal using a fiber optic sensor.

[0051] 3) Rubber seal bottoming judgment: The approximate position of the rubber seal and whether the rubber seal has touched the bottom are determined by the actual construction parameter values ​​and the theoretical parameter values ​​of the rubber seal bottoming obtained by mathematical model calculation.

[0052] Compared with existing technologies, this application determines the real-time position of the cementing rubber seal by detecting vibration signals, enabling engineering technicians to control the construction process more accurately and reasonably. This helps to improve and perfect cementing construction techniques, ensure downhole safety, improve cementing quality, and avoid cementing operation failures that could result in huge economic losses.

[0053] In addition, the deep well tubing rubber seal ring positioning technology in this application has simpler equipment requirements for vibration detection of cementing rubber seal rings compared to monitoring systems such as sonar sensors. It only requires fiber optic sensors, data acquisition equipment, and computers, and the equipment has good stability and low cost.

[0054] These or other aspects of this application will become more apparent from the following description of embodiments. It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the application. Attached Figure Description

[0055] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the embodiments of the present application to explain the application and do not constitute a limitation thereof. In the drawings:

[0056] Figure 1 This is a flowchart illustrating a method for positioning a rubber sealing ring in a deep well tubing, according to an embodiment of this application.

[0057] Figure 2 This is a flowchart illustrating the method for determining the bottom contact of a rubber sealing ring in a deep well tubing rubber sealing ring positioning method according to an embodiment of this application.

[0058] Figure 3 This is a flowchart of a real-time positioning method for a rubber sealing ring in a deep well tubing rubber sealing ring positioning method according to an embodiment of this application.

[0059] Figure 4 This is a schematic diagram of the fiber optic cable being lowered into the well in a method for positioning a rubber sealing ring in a deep well tubing, according to an embodiment of this application.

[0060] Figure 5 This is a schematic diagram of well monitoring in a deep well tubing rubber seal ring positioning method according to an embodiment of this application.

[0061] Figure 6This is a flowchart of the signal demodulation procedure in a deep well tubing rubber seal ring positioning method according to an embodiment of this application.

[0062] Figure 7 This is a system block diagram of a deep well tubing rubber sealing ring positioning system according to an embodiment of this application.

[0063] Figure 8 This is a schematic diagram of the overall operating framework of a deep well tubing rubber sealing ring positioning system according to an embodiment of this application. Detailed Implementation

[0064] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0065] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the disclosure of this application or its application or use. It should be noted that features in the embodiments of this application may be combined with each other unless otherwise specified.

[0066] Specifically, the embodiments of this application will be further described below with reference to the accompanying drawings.

[0067] like Figure 1 As shown, one embodiment of this application provides a method for positioning a rubber sealing ring in a deep well tubing, the method comprising the following steps:

[0068] Step 1: Based on the constructed mathematical model, obtain the relationship between the position of the rubber sealing ring and the construction parameters during the cementing process, in order to determine whether the rubber sealing ring has touched the bottom;

[0069] Step 2: Obtain the real-time monitoring parameters of the rubber seal ring's downward movement, and obtain the real-time position of the rubber seal ring based on parameter analysis. Step 2: Data processing.

[0070] In the deep well tubing rubber seal ring positioning method of this application, a mathematical model is established to derive the relationship between the position of the rubber seal ring and the construction parameters during cementing construction. The real-time position of the rubber seal ring is estimated by the parameters obtained from actual monitoring during construction. This application can determine the approximate position of the rubber seal ring and whether the rubber seal ring has touched the bottom by using actual construction parameter values ​​and theoretical parameter values ​​of the rubber seal ring bottoming obtained from the mathematical model. This helps to improve and perfect cementing construction technology measures, ensure downhole safety, improve cementing quality, and avoid cementing operation failure and huge economic losses.

[0071] In some embodiments, see Figure 2 As shown, the method for determining whether the rubber sealing ring has touched the bottom includes:

[0072] Construct a mathematical model of the rubber sealing ring and construction parameters;

[0073] Construction parameters are monitored and obtained, and then solved using the mathematical model.

[0074] Determine if the construction parameters have changed. If they have, apply high pressure and determine if the rubber sealing ring has reached the bottom based on the pressure change. If they have not changed, continue monitoring the construction parameters.

[0075] In the embodiments of this application, in view of the fact that the traditional method of obtaining data by pressure is not accurate and is affected by various factors, the method of this application constructs a mathematical model by constructing a model based on information such as flow rate, flow volume, and pressure. When the rubber sealing ring is about to reach the bottom, a large impact force is applied, causing a large change in pressure, flow rate, and flow volume, thereby confirming whether the bottom has been reached.

[0076] In one embodiment of this application, the mathematical model constructed for determining whether the rubber sealing ring has touched the bottom is an Euler-Bernoulli model of the casing string established for different cementing rubber sealing rings and cementing pipes. The method for determining whether the rubber sealing ring has touched the bottom further includes:

[0077] The impact force, flow velocity, and flow rate of the casing string were derived using Newton's laws of motion. A fluid-solid coupling model of the casing string, drilling fluid, and cement slurry was established to analyze the relationship between flow velocity, flow rate, pressure, and impact vibration.

[0078] Based on the relationship between flow velocity, flow rate, pressure and impact vibration, the frequency that maximizes the vibration displacement amplitude of the casing structure is obtained through harmonic response analysis, which serves as the data basis for the mathematical model used to determine whether the rubber sealing ring has touched the bottom.

[0079] In this embodiment, an Euler-Bernoulli model of the casing string is established for different cementing rubber seals and cementing pipes. The calculation formulas for the impact force, flow velocity, and flow rate of the casing string are derived using Newton's mechanics formulas. A fluid-structure interaction model of the casing string, drilling fluid, and cement slurry is established in the finite element analysis software Ansys. The relationship between flow velocity, flow rate, pressure, and impact vibration is obtained through modal analysis software. The frequency that maximizes the vibration displacement amplitude of the casing string structure is obtained through harmonic response analysis, providing a data basis for the mathematical model to determine whether the rubber seal has reached the bottom.

[0080] In some embodiments of this application, the deep well tubing rubber sealing ring positioning method further includes:

[0081] The vibration emitted by the rubber seal is monitored by a fiber optic sensor, thereby determining the real-time position of the rubber seal.

[0082] In this embodiment of the application, for real-time position monitoring of the rubber sealing ring during downward movement, the solution involves installing a vibration generator inside the rubber sealing ring to make it vibrate at a fixed frequency, and then using an optical fiber sensor outside the pipe wall to monitor the vibration signal and obtain position information.

[0083] Among them, see Figure 3 As shown, obtaining the real-time position of the rubber seal ring based on parameter analysis includes the following steps:

[0084] A vibration generator is installed inside the rubber sealing ring, wherein the vibration generator vibrates at a fixed frequency;

[0085] An optical fiber sensor is installed on the outside of the sleeve wall to monitor vibration signals and obtain position information;

[0086] Based on the maximum frequency of vibration displacement amplitude obtained from the mathematical model, and the vibration signal emitted by the rubber sealing ring during its descent, the host computer collects and obtains the position signal of the rubber sealing ring, and demodulates the signal to obtain the real-time position of the rubber sealing ring.

[0087] A vibration generator is installed inside the rubber sealing ring. After obtaining the maximum resonant frequency through the previously constructed mathematical model, the vibration response of the system is realized. This allows the rubber sealing ring to emit vibration signals continuously during its descent, which the host computer can then collect to determine its location. By implementing PID control on the brushless DC motor, the corresponding frequency generator can be obtained, thus serving as the primary vibration element.

[0088] Distributed fiber optic interferometers are currently the most widely used fiber optic sensing structure. External disturbance signals cause changes in the phase of the light wave, which are converted into changes in laser intensity by the interferometer structure. The photodetector 311 performs photoelectric conversion and provides the signal to the acquisition module for signal acquisition. Because the dual Math-Zehnder interferometer structure has high sensitivity and less fiber optic signal attenuation during long-distance measurements, a fiber optic sensor with a dual Math-Zehnder interferometer structure is selected.

[0089] In one embodiment of this application, see Figure 4 As shown, the fiber optic sensor is a dual Math-Zehnder interference structure, which consists of a light source generator 313, a coupler, a sensing fiber optic cable 312, and a photodetector 311. When the rubber sealing ring descends, the vibration generator inside the rubber sealing ring vibrates at a fixed frequency, and the optical cable outside the pipe wall detects the vibration by the change in interference light intensity. The computer on the ground analyzes and displays the results.

[0090] The implementation steps are as follows:

[0091] First, the optical cable is secured to the outer wall of the pipe before it is lowered into the well, allowing the cable containing the fiber optic vibration sensor to proceed with the pipe. (See also...) Figure 4 As shown, the fiber optic sensor with a dual Math-Zehnder interference structure consists of a light source generator 313, a coupler, a sensing fiber optic cable 312, and a photodetector 311.

[0092] Before cementing operations, theoretical values ​​of construction parameters are calculated using a mathematical model of the rubber seal ring's movement. During the construction process, the pressure above the well and the volume of cementing fluid are monitored in real time, and the relationship between real-time parameters and theoretical parameters is analyzed to estimate the approximate position of the rubber seal ring until the pressure generated when the rubber seal ring touches the bottom is detected.

[0093] See Figure 5 As shown, while the rubber sealing ring moves downward, the vibration generator inside the rubber sealing ring vibrates at a fixed frequency. The optical cable outside the pipe wall detects the vibration by detecting changes in the intensity of the interference light, and the computer on the ground analyzes and displays the results.

[0094] In some embodiments of this application, since the phase difference between the light intensity signal output by the interferometer and the external vibration signal is nonlinear, the phase change of the vibration signal cannot be directly obtained from the detector's detection signal. Instead, signal demodulation technology is needed to reconstruct the phase information of the disturbance signal, thereby obtaining the vibration signal that caused the phase change. Therefore, in interferometric fiber optic sensing systems, signal phase demodulation is crucial for accurately detecting external disturbances.

[0095] See Figure 6 As shown, the signal demodulation method includes:

[0096] Step 1) Signal Acquisition

[0097] Continuous acquisition of interference signal data;

[0098] Step 2) Signal preprocessing

[0099] A morphological filtering method based on elliptic template interpolation is used to denoise and polarize the original signal;

[0100] Step 3) Signal demodulation

[0101] A 3x3 coupler demodulation structure is adopted, and an elliptic fitting demodulation algorithm based on the Least Square Estimation method is used to restore the phase information of the vibration signal.

[0102] Specifically, the signal demodulation program includes the following parts: 1) Data acquisition: continuous acquisition of interference signal data; 2) Noise reduction and polarization processing: morphological filtering based on elliptic template interpolation is used to denoise and polarize the original signal to improve the system signal-to-noise ratio; 3) Signal demodulation: a 3x3 coupler demodulation structure is used, and an elliptic fitting demodulation algorithm based on the Least Square estimation method is employed to restore the phase information of the vibration signal.

[0103] Among them, the morphological filtering method based on elliptical template interpolation filtering is used because the presence of noise makes the Lissajous image synthesized from the interference signal an elliptical ring. Therefore, the elliptical Lissajous image is first obtained by reasonable downsampling. Then, histogram denoising and neighborhood thresholding are performed on this image to obtain a two-dimensional elliptical template for morphological filtering, which is used as the structural element of this method. This template is then used to filter the original data to finally obtain the ideal Lissajous ellipse, so as to improve the accuracy of signal demodulation.

[0104] The 3x3 coupler demodulation algorithm based on elliptic fitting is based on the synthesis principle of the Lissajous diagram in optical physics. Any two signals output from the 3x3 coupler are modulated by the same vibrational signal. Their vibrational modes are equivalent to simple harmonic motion, with the same frequency and a fixed phase difference. Furthermore, the phase difference between the two signals is close to 2rd³, therefore, any two signals can be fitted with an elliptic curve. Thus, the output signal equation is: The elliptic equations for the two signals output from the same Mach-Zendel 3x3 coupler can be written as: The coefficient matrix of this elliptic curve is represented by g = [a, b, c, d, e, f]T. From the perspective of simplifying calculations, 4ac-b is chosen. 2 =1, then use curve fitting algorithms such as Least Square Estimation to solve for the coefficients of the Lissajous ellipse equation, and calculate the corresponding signal coefficients. The formula for calculating the signal coefficients is: Substituting the obtained signal coefficients into the signal equation, we can solve for cosΦ(t) and sinΦ(t). Finally, by cross-multiplying the differentials, we can obtain the phase change: Φ(t)=∫[cosΦ(t)(sinΦ(t))'-cosΦ(t)'(sinΦ(t))].

[0105] The deep well tubing rubber sealing ring positioning method of this application can achieve:

[0106] 1) Construction parameter monitoring: During the construction operation, construction parameters such as pressure value and cementing fluid volume are monitored in real time on the well.

[0107] 2) Rubber seal position monitoring: The real-time position of the cementing rubber seal is determined by detecting the vibration signal emitted by the rubber seal using a fiber optic sensor.

[0108] 3) Rubber seal bottoming judgment: The approximate position of the rubber seal and whether the rubber seal has touched the bottom are determined by the actual construction parameter values ​​and the theoretical parameter values ​​of the rubber seal bottoming obtained by mathematical model calculation.

[0109] In one embodiment of this application, see Figure 7 As shown, this application also discloses a deep well tubing rubber sealing ring positioning system, including a data input module 100, a construction monitoring module 200, a cementing engineering database module 300, a report generation module 400, and a playback module 500.

[0110] The data input module 100 is used to input basic data into the interface; wherein, the data input module 100 includes a series of interface programs and user interfaces for inputting and editing basic data, and deriving the corresponding theoretical values ​​of construction parameters through mathematical models; the data input module 100 also includes a parameter communication interface for reading cementing construction parameters in real time by detecting the parameter communication interface.

[0111] In the embodiments of this application, the data input module 100 includes a series of interface programs and a user interface. Through the basic data input interface, basic data such as wellbore structure, formation pressure zone temperature, drilling fluid properties, directional measurement data, and electrical logging diameter can be entered and edited via human-computer interaction and electronic documents. The corresponding theoretical values ​​of construction parameters are then derived through mathematical models. Through the detection parameter communication interface, cementing construction parameters, such as pressure and flow rate monitored on the wellbore, can be read in real time. Construction parameter monitoring data can be output to the database through the output interface program, and can be printed and copied according to user requirements in a specified format.

[0112] The construction monitoring module 200 includes a data acquisition and communication module and a data calibration unit. It is used to read construction parameter signals in real time and display the dynamic changes of construction parameters, compare actual construction parameters with theoretical parameter values, and display the approximate position of the rubber sealing ring estimated therefrom. The construction monitoring module 200 is also used to analyze data obtained from fiber optic sensors to determine the real-time position of the rubber sealing ring.

[0113] In the embodiments of this application, when the construction monitoring module 200 is in use, the computer reads signals such as flow rate, density, and pressure in real time through the data acquisition and communication interface. After processing and calculation, the dynamic changes of construction parameters such as flow rate, cumulative flow rate, wellhead pressure, slurry density, and injection / displacement time are displayed in the form of data, analog instruments, and curves. Simultaneously, the actual construction parameters are compared with theoretical parameter values ​​to display the approximate position of the rubber sealing ring. Furthermore, the real-time position of the rubber sealing ring is determined through data analysis obtained from fiber optic sensors. Engineering technicians can intuitively monitor surface parameters and downhole dynamics, effectively controlling the cementing operation.

[0114] Among them, the data acquisition and communication module drives the data acquisition and communication system hardware to complete the real-time acquisition, conversion, processing, transmission and reception of solidification well parameters.

[0115] The cementing engineering database module 300 is used to store and manage cementing design, simulation analysis, and construction monitoring data.

[0116] The report generation module 400 is used to automatically generate construction monitoring results and edit, modify, save, and print the output documents;

[0117] The playback module 500 is used to retrieve construction monitoring data from the database, replay the changes in construction parameters and downhole injection and displacement dynamic parameters, perform technical analysis on cementing operations, and summarize construction experience.

[0118] In some embodiments, the report generation module automatically generates construction monitoring results in the form of a WORD document, which users can edit, modify, save, and print in the WORD environment. The playback module 500 can retrieve construction monitoring data from the database, replay the changes in construction parameters and downhole injection / displacement dynamic parameters, perform technical analysis on cementing operations, and summarize construction experience.

[0119] See Figure 8As shown, when using the deep well tubing rubber seal ring positioning system disclosed in this application to perform the deep well tubing rubber seal ring positioning method of the above embodiment, the basic data is input to the construction monitoring module 200 for construction monitoring through the interface program of the upper column of the data input module 100. At the same time, the data communication interface reads the cementing construction parameters in real time, performs data calibration, and inputs them to the construction monitoring module 200 for construction monitoring. Then, the construction monitoring module 200 outputs the construction parameter monitoring data to the ancient well engineering database through the output interface program. The cementing engineering database module 300 stores and manages the cementing design, simulation analysis, and construction monitoring data. The playback module 500 retrieves the construction monitoring data from the database, plays back the changes in construction parameters and downhole injection dynamic parameters, performs technical analysis on the cementing operation, summarizes the construction experience, and generates a report through the report generation module 400.

[0120] In one embodiment, a deep well tubing rubber seal positioning device is also provided, including at least one processor and a memory communicatively connected to the at least one processor. The memory stores instructions executable by the at least one processor. The instructions are executed by the at least one processor to enable a deep well tubing rubber seal positioning method performed by the at least one processor. When the processor executes the instructions, it implements the steps in the above-described method embodiments:

[0121] Based on the constructed mathematical model, the relationship between the position of the rubber sealing ring and the construction parameters during cementing construction is obtained to determine whether the rubber sealing ring has touched the bottom.

[0122] Obtain the real-time monitoring parameters of the rubber seal's downward movement, and analyze the parameters to obtain the real-time position of the rubber seal.

[0123] In one embodiment, a computer-readable storage medium is provided, storing computer instructions for causing a computer to execute a method for positioning a rubber seal ring in a deep well tubing, comprising the following steps:

[0124] Based on the constructed mathematical model, the relationship between the position of the rubber sealing ring and the construction parameters during cementing construction is obtained to determine whether the rubber sealing ring has touched the bottom.

[0125] The real-time monitoring parameters of the rubber seal ring's downward movement are obtained, and the real-time position of the rubber seal ring is obtained based on parameter analysis. Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program characterized by computer instructions instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory.

[0126] Non-volatile memory may include read-only memory, magnetic tape, floppy disk, flash memory, or optical storage. Volatile memory may include random access memory or external cache memory. By way of illustration and not limitation, RAM can take many forms, such as static random access memory or dynamic random access memory.

[0127] In summary, the deep well tubing rubber sealing ring positioning method, system, device, and storage medium provided in this application can achieve the following effects:

[0128] 1) Construction parameter monitoring: During the construction operation, construction parameters such as pressure value and cementing fluid volume are monitored in real time on the well.

[0129] 2) Rubber seal position monitoring: The real-time position of the cementing rubber seal is determined by detecting the vibration signal emitted by the rubber seal using a fiber optic sensor.

[0130] 3) Rubber seal bottoming judgment: The approximate position of the rubber seal and whether the rubber seal has touched the bottom are determined by the actual construction parameter values ​​and the theoretical parameter values ​​of the rubber seal bottoming obtained by mathematical model calculation.

[0131] Compared with existing technologies, this application determines the real-time position of the cementing rubber seal by detecting vibration signals, enabling engineering technicians to control the construction process more accurately and reasonably. This helps to improve and perfect cementing construction techniques, ensure downhole safety, improve cementing quality, and avoid cementing operation failures that could result in huge economic losses.

[0132] In addition, the deep well tubing rubber seal ring positioning technology in this application has simpler equipment requirements for vibration detection of cementing rubber seal rings compared to monitoring systems such as sonar sensors. It only requires fiber optic sensors, data acquisition equipment, and computers, and the equipment has good stability and low cost.

[0133] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for positioning a rubber sealing ring in a deep well tubing, characterized in that, include: Based on the constructed mathematical model, the relationship between the position of the rubber sealing ring and the construction parameters during cementing construction is obtained to determine whether the rubber sealing ring has touched the bottom. Obtain the real-time monitoring parameters of the rubber seal ring's downward movement, and analyze the parameters to obtain the real-time position of the rubber seal ring; The method for determining whether the rubber sealing ring has touched the bottom includes: Construct a mathematical model of the rubber sealing ring and construction parameters; Construction parameters are monitored and obtained, and then solved using the mathematical model. Determine if the construction parameters have changed. If they have, apply high pressure and determine if the rubber sealing ring has reached the bottom based on the pressure change. If they have not changed, continue monitoring the construction parameters. The mathematical model used to determine whether the rubber sealing ring has touched the bottom is an Euler-Bernoulli model of the casing string established for different cementing rubber sealing rings and cementing pipes; the method for determining whether the rubber sealing ring has touched the bottom also includes: The impact force, flow velocity, and flow rate of the casing string were derived using Newton's laws of motion. A fluid-solid coupling model of the casing string, drilling fluid, and cement slurry was established to analyze the relationship between flow velocity, flow rate, pressure, and impact vibration. Based on the relationship between flow velocity, flow rate, pressure and impact vibration, the frequency that maximizes the vibration displacement amplitude of the casing structure is obtained through harmonic response analysis, which serves as the data basis for the mathematical model used to determine whether the rubber sealing ring has touched the bottom. The method for positioning the rubber sealing ring of the deep well tubing also includes: The vibration emitted by the rubber seal is monitored by a fiber optic sensor, thereby determining the real-time position of the rubber seal.

2. The method for positioning the rubber sealing ring of a deep well tubing according to claim 1, characterized in that, The process of obtaining the real-time position of the rubber seal based on parameter analysis includes the following steps: A vibration generator is installed inside the rubber sealing ring, wherein the vibration generator vibrates at a fixed frequency; An optical fiber sensor is installed on the outside of the sleeve wall to monitor vibration signals and obtain position information; Based on the maximum frequency of vibration displacement amplitude obtained from the mathematical model, and the vibration signal emitted by the rubber sealing ring during its descent, the host computer collects and obtains the position signal of the rubber sealing ring, and demodulates the signal to obtain the real-time position of the rubber sealing ring.

3. The method for positioning the rubber sealing ring of a deep well tubing according to claim 2, characterized in that, The fiber optic sensor is a dual Math-Zehnder interference structure, which consists of a light source generator, a coupler, a sensing fiber, and a photodetector. When the rubber sealing ring descends, the vibration generator inside the rubber sealing ring vibrates at a fixed frequency. The optical cable outside the pipe wall detects the vibration by observing the change in the intensity of the interference light, and the computer on the ground analyzes and displays the results.

4. The method for positioning the rubber sealing ring of a deep well tubing according to claim 3, characterized in that, The signal demodulation method includes: Step 1) Signal Acquisition Continuous acquisition of interference signal data; Step 2) Signal preprocessing A morphological filtering method based on elliptic template interpolation is used to denoise and polarize the original signal; Step 3) Signal demodulation A 3x3 coupler demodulation structure is adopted, and an elliptic fitting demodulation algorithm based on the Least Square Estimation method is used to restore the phase information of the vibration signal.

5. A deep well tubing rubber seal ring positioning system for implementing the deep well tubing rubber seal ring positioning method as described in any one of claims 1-4, characterized in that, include: The data input module is used to input basic data into the interface; The construction monitoring module includes a data acquisition and communication module and a data calibration unit, which are used to read construction parameter signals in real time and display the dynamic changes of construction parameters, compare actual construction parameters with theoretical parameter values, and display the approximate position of the rubber sealing ring estimated therefrom. The cementing engineering database module is used to store and manage cementing design, simulation analysis, and construction monitoring data. The report generation module is used to automatically generate construction monitoring results and to edit, modify, save, and print the output documents. as well as The playback module is used to retrieve construction monitoring data from the database, replay the changes in construction parameters and downhole injection and displacement dynamic parameters, perform technical analysis on cementing operations, and summarize construction experience.

6. A positioning device for a rubber sealing ring in a deep well tubing, characterized in that, The system includes a processor, a memory, a communication interface, and a communication bus. The processor, the memory, and the communication interface communicate with each other through the communication bus. The memory stores at least one executable instruction, which causes the processor to perform the operation corresponding to the deep well tubing rubber seal ring positioning method as described in any one of claims 1-3.

7. A storage medium, characterized in that, The storage medium stores at least one executable instruction, which causes the processor to perform the operation corresponding to the deep well tubing rubber seal positioning method as described in any one of claims 1-3.

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