Casing running passability prediction method and apparatus

Abstract

The application discloses a casing running passability prediction method and device, and relates to the technical field of data processing. The application comprises the following steps: acquiring drilling data corresponding to each measuring point included in a target open hole section; calculating casing axial force, mechanical resistance value and comprehensive friction resistance value corresponding to each measuring point according to the drilling data corresponding to each measuring point and a modified mechanical model; calculating casing running safety factors corresponding to each measuring point according to the mechanical resistance value and the comprehensive friction resistance value corresponding to each measuring point; calculating sine buckling critical load and helical buckling critical load corresponding to each measuring point according to the drilling data corresponding to each measuring point; and determining a casing running passability prediction result corresponding to the target open hole section according to the casing running safety factors, the casing axial force, the sine buckling critical load, the helical buckling critical load and the comprehensive friction resistance value corresponding to each measuring point.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of data processing, and particularly relates to a casing running passability prediction method and device. BACKGROUND

[0002] With the continuous development of oil and gas exploitation technology, horizontal well and extended reach well technology is widely used. Horizontal well and extended reach well can significantly increase the contact area with the oil layer, thereby effectively improving the single well production and oil recovery. However, due to the complex well structure of horizontal well and extended reach well, there is a well section with large inclination angle and long build-up section. The contact area between the casing and the well wall increases accordingly at this type of well section, thereby increasing the friction between the casing and the well wall. In addition, the rock debris bed formed due to poor hole cleaning effect at the high angle deviated well section also increases the resistance when the casing is run in. Therefore, as the casing running depth increases, the frictional resistance that the casing needs to overcome also increases, thereby causing the casing to be difficult to run smoothly to the target depth. Therefore, before the casing is run in, the casing running passability needs to be predicted to determine whether the casing can be run smoothly to the target depth.

[0003] When the existing casing running passability prediction method is used to predict the casing running passability, it is assumed that the wellbore is a regular geometric shape. However, in actual application, the wellbore of horizontal well and extended reach well is irregular in shape, such as expansion, necking and keyway. Since the existing casing running passability prediction method does not consider the influence of irregular wellbores, the prediction result obtained by using the existing casing running passability prediction method is not accurate. SUMMARY

[0004] The embodiments of the present application provide a casing running passability prediction method and device, and the main purpose is to accurately predict the passability of the casing running into the target open hole section.

[0005] To solve the above technical problems, the embodiments of the present application provide the following technical solutions:

[0006] In a first aspect, the present application provides a casing running passability prediction method, which comprises:

[0007] obtaining drilling data corresponding to each measuring point included in the target open hole section;

[0008] calculating the casing axial force, mechanical resistance value and comprehensive frictional resistance value corresponding to each measuring point according to the drilling data corresponding to each measuring point and a modified mechanical model, wherein the modified mechanical model is obtained by modifying the conventional mechanical model by taking the additional mechanical resistance generated in the casing running process due to the roughness of the irregular wellbore as an influencing factor;

[0009] Calculate the casing insertion safety factor for each measuring point based on the mechanical resistance value and the comprehensive friction value corresponding to each measuring point.

[0010] Calculate the sinusoidal buckling critical load and helical buckling critical load for each measuring point based on the drilling data corresponding to each measuring point;

[0011] The casing running passability prediction result for the target open hole section is determined based on the casing running safety factor, casing axial force, sinusoidal buckling critical load, helical buckling critical load, and comprehensive friction value corresponding to each measuring point.

[0012] Secondly, this application also provides a cannula insertion passability prediction device, the device comprising:

[0013] The acquisition unit is used to acquire drilling data corresponding to each measuring point contained in the target open-hole section;

[0014] The first calculation unit is used to calculate the casing axial force, mechanical resistance value and comprehensive friction value corresponding to each measuring point based on the drilling data and the modified mechanical model corresponding to each measuring point. The modified mechanical model is obtained by modifying the conventional mechanical model by taking the additional mechanical resistance generated during the casing running process due to the roughness of the irregular wellbore as an influencing factor.

[0015] The second calculation unit is used to calculate the casing lowering safety factor for each measuring point based on the mechanical resistance value and the comprehensive friction value corresponding to each measuring point.

[0016] The third calculation unit is used to calculate the sinusoidal buckling critical load and helical buckling critical load corresponding to each of the measuring points based on the drilling data corresponding to each measuring point.

[0017] The determination unit is used to determine the casing running passability prediction result corresponding to the target open hole section based on the casing running safety factor, casing axial force, sinusoidal buckling critical load, helical buckling critical load and comprehensive friction value corresponding to each measuring point.

[0018] Thirdly, embodiments of this application provide a computer device including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method described in the first aspect.

[0019] Fourthly, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described in the first aspect.

[0020] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the steps of the method described in the first aspect.

[0021] By employing the above-described technical solution, the technical solution provided in this application has at least the following advantages:

[0022] This application provides a method and apparatus for predicting the passability of casing installation. After obtaining drilling data corresponding to each measuring point within the target open hole section using a passability prediction application, the application first calculates the casing axial force, mechanical resistance value, and comprehensive friction value for each measuring point based on the drilling data and a modified mechanical model. Then, it calculates the casing installation safety factor for each measuring point based on the mechanical resistance value and comprehensive friction value, and calculates the sinusoidal buckling critical load and helical buckling critical load for each measuring point based on the drilling data. Finally, it determines the casing installation passability prediction result for the target open hole section based on the casing installation safety factor, casing axial force, sinusoidal buckling critical load, helical buckling critical load, and comprehensive friction value for each measuring point. Because this application considers the additional mechanical resistance caused by the roughness of irregular wellbores during the casing running process, which affects the friction value during casing running, the conventional mechanical model is modified by taking the additional mechanical resistance caused by the roughness of irregular wellbores as an influencing factor, resulting in a modified mechanical model. Based on the modified mechanical model and the drilling data corresponding to each measuring point in the target open hole section, the casing axial force, mechanical resistance value, and comprehensive friction value corresponding to each measuring point are predicted. Furthermore, the casing running passability prediction result corresponding to the target open hole section is determined based on the casing running safety factor, casing axial force, sinusoidal buckling critical load, helical buckling critical load, and comprehensive friction value corresponding to each measuring point. This allows the prediction of the passability of casing running into the target open hole section to take into account the influence of irregular wellbores, thereby enabling accurate prediction of the passability of casing running into the target open hole section.

[0023] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0024] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, with the same or corresponding reference numerals denoteing the same or corresponding parts, wherein:

[0025] Figure 1 A flowchart of a cannula insertion passability prediction method provided in an embodiment of this application is shown;

[0026] Figure 2 This diagram illustrates a block diagram of a cannula insertion passability prediction device provided in an embodiment of this application.

[0027] Figure 3 This paper illustrates a block diagram of another cannula insertion passability prediction device provided in an embodiment of this application. Detailed Implementation

[0028] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.

[0029] Furthermore, the terms “first,” “second,” and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts.

[0030] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains.

[0031] Existing methods for predicting casing run-in passability assume a regular wellbore geometry. However, in practice, horizontal wells and extended reach wells often have irregular shapes such as enlarged diameters, necked sections, and keyways. Because these methods do not account for the impact of irregular wellbore shapes, the predictions obtained using them are inaccurate.

[0032] Therefore, in order to ensure accurate prediction of the passability of casing running into the target open hole section, embodiments of this application provide a casing running passability prediction method, such as... Figure 1 As shown, the method includes at least 101-105.

[0033] 101. Obtain drilling data corresponding to each measuring point in the target open-hole section.

[0034] In the embodiments of this application, the execution entity in each step is a passability prediction application running on the target terminal device, wherein the target terminal device may be, but is not limited to, a computer, tablet computer, laptop computer, etc.

[0035] The target open hole section is the section of the target well where casing needs to be installed. The target open hole section contains multiple micro-segments, each corresponding to a measuring point. For example, if the target open hole section is 2000 meters long, it can be divided into 2000 micro-segments, each 1 meter long. For any measuring point, the corresponding drilling data may include, but is not limited to, the following: wellbore type, measured well diameter, rate of change of inclination angle, rate of change of azimuth angle, inclination angle, casing diameter, casing bending stiffness, casing linear weight, casing-wellbore radial clearance, etc.

[0036] When it is necessary to predict the passability of casing running into a target open hole section, the passability prediction application needs to first obtain the drilling data corresponding to each measuring point in the target open hole section. The specific process is as follows: First, obtain the drilling data corresponding to the target open hole section, which may include, but is not limited to, logging data, well logging history, and drilling logs corresponding to the target open hole section; Second, extract the drilling data corresponding to each measuring point from the drilling data corresponding to the target open hole section.

[0037] 102. Calculate the casing axial force, mechanical resistance value and comprehensive friction value corresponding to each measuring point based on the drilling data and modified mechanical model corresponding to each measuring point.

[0038] The modified mechanical model is obtained by modifying the conventional mechanical model by taking the additional mechanical resistance caused by the roughness of the irregular wellbore during the casing running process as an influencing factor.

[0039] Since the roughness of irregular wellbore causes additional mechanical resistance during casing installation, thus affecting the friction value during casing installation, the conventional mechanical model is modified by taking the additional mechanical resistance caused by the roughness of irregular wellbore during casing installation as an influencing factor, resulting in a modified mechanical model.

[0040] After obtaining the drilling data corresponding to each measuring point, the passability prediction application can calculate the casing axial force, mechanical resistance value, and comprehensive friction value corresponding to each measuring point based on the drilling data and the modified mechanical model.

[0041] 103. Calculate the casing lowering safety factor for each measuring point based on the mechanical resistance value and comprehensive friction value corresponding to each measuring point.

[0042] After calculating the axial force, mechanical resistance, and combined friction value of the casing at each measuring point, the passability prediction application can calculate the casing lowering safety factor for each measuring point based on the mechanical resistance and combined friction values. That is, for any measuring point, the ratio of the mechanical resistance value to the combined friction value is determined as the casing lowering safety factor for that measuring point.

[0043] 104. Calculate the sinusoidal buckling critical load and helical buckling critical load for each measuring point based on the drilling data corresponding to each measuring point.

[0044] The passability prediction application calculates the casing insertion safety factor for each measuring point, and also needs to calculate the sinusoidal buckling critical load and helical buckling critical load for each measuring point based on the drilling data corresponding to each measuring point.

[0045] Specifically, in this step, for any given measuring point, the type of well section corresponding to that measuring point can be determined first. Then, based on the type of well section corresponding to that measuring point, the corresponding sinusoidal buckling critical load calculation formula and helical buckling critical load calculation formula can be selected. The drilling data corresponding to that measuring point can be substituted into the selected sinusoidal buckling critical load calculation formula and helical buckling critical load calculation formula to calculate the sinusoidal buckling critical load and helical buckling critical load corresponding to that measuring point.

[0046] 105. Based on the casing running safety factor, casing axial force, sinusoidal buckling critical load, helical buckling critical load, and comprehensive friction value corresponding to each measuring point, determine the casing running passability prediction results for the target open hole section.

[0047] After calculating the sinusoidal buckling critical load and helical buckling critical load for each measuring point, the passability prediction application can determine the casing run-through predictive results for the target open hole section based on the casing run-in safety factor, casing axial force, sinusoidal buckling critical load, helical buckling critical load, and comprehensive friction value for each measuring point.

[0048] This application provides a casing running passability prediction method. After obtaining drilling data corresponding to each measuring point within the target open hole section using a passability prediction application, the application first calculates the casing axial force, mechanical resistance value, and comprehensive friction value for each measuring point based on the drilling data and a modified mechanical model. Then, it calculates the casing running safety factor for each measuring point based on the mechanical resistance value and comprehensive friction value, and calculates the sinusoidal buckling critical load and helical buckling critical load for each measuring point based on the drilling data. Finally, it determines the casing running passability prediction result for the target open hole section based on the casing running safety factor, casing axial force, sinusoidal buckling critical load, helical buckling critical load, and comprehensive friction value for each measuring point. Because the roughness of irregular wellbores in this embodiment of the application considers the additional mechanical resistance generated during the casing running process due to the roughness of the irregular wellbore, which affects the friction value during the casing running process, the conventional mechanical model is modified by taking the additional mechanical resistance generated during the casing running process due to the roughness of the irregular wellbore as an influencing factor, resulting in a modified mechanical model. Based on the modified mechanical model and the drilling data corresponding to each measuring point in the target open hole section, the casing axial force, mechanical resistance value and comprehensive friction value corresponding to each measuring point are predicted. The casing running passability prediction result corresponding to the target open hole section is determined according to the casing running safety factor, casing axial force, sinusoidal buckling critical load, helical buckling critical load and comprehensive friction value corresponding to each measuring point. This makes it possible to accurately predict the passability of the casing running into the target open hole section by considering the influence of irregular wellbores in the process of predicting the passability of the casing running into the target open hole section.

[0049] Furthermore, in this embodiment, the specific process by which the throughput prediction application calculates the casing axial force, mechanical resistance value, and comprehensive friction value corresponding to each measuring point based on the drilling data and modified mechanical model corresponding to each measuring point is as follows:

[0050] First, the borehole diameter concavity parameter, borehole curvature parameter, and borehole clearance ratio parameter are calculated based on the drilling data corresponding to each measuring point.

[0051] Among them, the wellbore concavity parameter is used to indicate the slight undulations and irregularities of the inner surface of the wellbore; the wellbore curvature parameter is the curvature of the wellbore trajectory, used to indicate the degree of curvature of the wellbore trajectory; the wellbore clearance ratio parameter is used to indicate the ratio of the annular space area between the casing and the actual drilled wellbore at the same well depth to the area of ​​the actual drilled wellbore.

[0052] Because the roughness of irregular wellbores causes additional mechanical resistance during the casing running process, it affects the friction value during the casing running process. For any measuring point, the mechanical resistance at that measuring point can be calculated based on the roughness of the wellbore at that measuring point.

[0053] After feature parameter screening, the researchers concluded that the wellbore roughness is most strongly correlated with the wellbore diameter concavity parameter, wellbore curvature parameter, and wellbore clearance ratio parameter. This means that these three parameters are the most relevant to wellbore roughness. Therefore, for any given measuring point, the wellbore roughness can be calculated based on these parameters. Consequently, after obtaining the drilling data for each measuring point, the throughput prediction application needs to calculate the corresponding wellbore diameter concavity parameter, wellbore curvature parameter, and wellbore clearance ratio parameter for each measuring point. The specific process is as follows:

[0054] The target measuring point can be any one of the multiple measuring points contained in the target open-hole section. The associated measuring points corresponding to the target measuring point are the N preceding measuring points and the N following measuring points adjacent to the target measuring point, where N is a positive integer.

[0055] (1) Determine the predicted well diameter corresponding to the target measuring point based on the well type corresponding to the target measuring point. Wherein, when the well type corresponding to the target measuring point is a large-bore well, the predicted well diameter corresponding to the target measuring point = D b (1+k), when the well type corresponding to the target measuring point is a reduced-diameter well, the predicted well diameter corresponding to the target measuring point = D b When the well type corresponding to the target measuring point is another irregular well (such as an open-hole keyway well), the predicted well diameter corresponding to the target measuring point = ,in, For the design dimensions of the drill bit, The preset expansion rate threshold can take values ​​such as, but is not limited to, 0.1, 0.15, etc. This is the average of the measured well diameter corresponding to the target measuring point and the measured well diameter corresponding to multiple associated measuring points.

[0056] (2) Substitute the predicted well diameter, the measured well diameter, and the measured well diameter of each associated well point into the preset formula to calculate the well diameter concavity parameter corresponding to the target well point. The preset formula is as follows:

[0057]

[0058] in, Here, n represents the wellbore concavity parameter corresponding to the target measurement point, and n represents the total number of the target measurement point plus multiple associated measurement points.wv D is the predicted well diameter corresponding to the target measuring point. wi The target measurement point and the i-th measurement point among multiple associated measurement points.

[0059] (3) Substitute the well inclination angle change rate, azimuth angle change rate, well inclination angle and characteristic length corresponding to the target measuring point into the preset formula to calculate the wellbore curvature parameter corresponding to the target measuring point. The preset formula is as follows:

[0060]

[0061] in, The wellbore curvature parameter corresponding to the target measuring point. L The feature length can take values ​​such as, but is not limited to, 1. k α The rate of change of the well inclination angle corresponding to the target measuring point. The azimuth rate of change corresponding to the target measuring point. The well inclination angle corresponding to the target measuring point.

[0062] (4) Substitute the measured wellbore diameter and casing diameter corresponding to the target viewpoint into the preset formula to calculate the wellbore clearance ratio parameter corresponding to the target measurement point. The preset formula is as follows:

[0063]

[0064] in, The wellbore clearance ratio parameter corresponding to the target measuring point. The measured well diameter corresponding to the target measuring point. A is the diameter of the sleeve corresponding to the target measuring point. w A is the cross-sectional area of ​​the wellbore at the target measuring point. C It is the annular cross-sectional area of ​​the wellbore and casing at the target measuring point.

[0065] Next, the wellbore roughness parameters, wellbore curvature parameters, and wellbore clearance ratio parameters corresponding to each measuring point are substituted into the first preset formula to calculate the wellbore roughness value corresponding to each measuring point.

[0066] The first preset formula is as follows:

[0067]

[0068] in, The roughness value of the wellbore corresponding to the target measuring point. The wellbore concavity parameters corresponding to the target measuring point. The wellbore curvature parameter corresponding to the target measuring point. The wellbore clearance ratio parameter corresponding to the target measuring point.γ 1, γ 2, γ 3 represents the weighting coefficients corresponding to the wellbore concavity parameter, wellbore curvature parameter, and wellbore clearance ratio parameter, respectively.

[0069] This involves pre-setting multiple preset values ​​for each weight coefficient, then conducting orthogonal experiments based on these preset values, using the minimum absolute value of the objective function as the rule. The final value of each weight coefficient is determined based on the orthogonal experiment results. The objective function is specifically defined as follows:

[0070]

[0071] in, γ These are the weighting coefficients. This refers to the measured hook load corresponding to irregular wellbore. The predicted hook load for irregular wellbore is calculated based on a modified mechanical model.

[0072] After calculating the wellbore roughness parameters, wellbore curvature parameters, and wellbore clearance ratio parameters corresponding to each measuring point, the passability prediction application can substitute these parameters into the first preset formula to calculate the wellbore roughness value for each measuring point. The specific process is as follows:

[0073] (1) Normalize the wellbore concavity parameters corresponding to multiple measuring points to obtain the normalized wellbore concavity parameters corresponding to each measuring point. That is, use the Min-Max normalization formula to normalize the wellbore concavity parameters corresponding to multiple measuring points to obtain the normalized wellbore concavity parameters corresponding to each measuring point.

[0074] (2) Normalize the wellbore curvature parameters corresponding to multiple measuring points to obtain the normalized wellbore curvature parameters corresponding to each measuring point. That is, use the Min-Max normalization formula to normalize the wellbore curvature parameters corresponding to multiple measuring points to obtain the normalized wellbore curvature parameters corresponding to each measuring point.

[0075] (3) Normalize the wellbore clearance ratio parameters corresponding to multiple measuring points to obtain the normalized wellbore clearance ratio parameters corresponding to each measuring point. That is, use the Min-Max normalization formula to normalize the wellbore clearance ratio parameters corresponding to multiple measuring points to obtain the normalized wellbore clearance ratio parameters corresponding to each measuring point.

[0076] (4) Substitute the normalized wellbore concavity parameter, normalized wellbore curvature parameter and normalized wellbore clearance ratio parameter corresponding to each measuring point into the first preset formula to calculate the wellbore roughness value corresponding to each measuring point.

[0077] Next, based on the preset mechanical resistance coefficient and the wellbore roughness value corresponding to each measuring point, the mechanical resistance value corresponding to each measuring point is calculated.

[0078] After calculating the wellbore roughness value corresponding to each measuring point, the passability prediction application can calculate the mechanical resistance value corresponding to each measuring point based on the preset mechanical resistance coefficient and the wellbore roughness value corresponding to each measuring point. That is, for any measuring point, the product of the wellbore roughness value corresponding to the measuring point and the preset mechanical resistance coefficient is determined as the mechanical resistance value corresponding to the measuring point.

[0079] Then, based on the mechanical resistance value corresponding to each measuring point and the modified mechanical model, the foundation friction value and the axial force of the casing corresponding to each measuring point are calculated.

[0080] After calculating the mechanical resistance value corresponding to each measuring point, the passability prediction application can calculate the foundation friction value and casing axial force corresponding to each measuring point based on the mechanical resistance value and the modified mechanical model. The specific process is as follows:

[0081] The target measuring point can be any one of multiple measuring points included in the target open-hole section, where the preceding measuring point is adjacent to the target measuring point, and the well depth of the micro-element corresponding to the preceding measuring point is greater than the well depth of the micro-element corresponding to the target measuring point; the modified mechanical model is specifically as follows:

[0082]

[0083] in, F The axial force of the casing corresponding to the target measuring point. s The length of the infinitesimal segment corresponding to the target measurement point. EI The bending stiffness of the sleeve corresponding to the target measuring point; The normalized wellbore curvature parameter corresponding to the target measuring point. q The weight of the casing line corresponding to the target measuring point. The well inclination angle corresponding to the target measuring point. This represents the basic friction value corresponding to the previous measuring point. The mechanical resistance value corresponding to the target measuring point. To preset the mechanical resistance coefficient, This represents the wellbore roughness value corresponding to the target measuring point.

[0084] (1) Substitute the basic friction value corresponding to the previous measuring point, the length of the micro-segment corresponding to the target measuring point, the casing bending stiffness, the normalized wellbore curvature parameter, the casing linear weight, the well inclination angle and the mechanical resistance value into the modified mechanical model to calculate the casing axial force corresponding to the target measuring point.

[0085] (2) Determine the additional contact force corresponding to the target measuring point based on the casing axial force corresponding to the target measuring point. That is, substitute the casing axial force, casing borehole radial clearance, and casing bending stiffness corresponding to the target measuring point into the second preset formula to calculate the additional contact force corresponding to the target measuring point. The second preset formula is as follows:

[0086]

[0087] in, W b r is the additional contact force corresponding to the target measuring point. b The radial clearance of the casing wellbore corresponding to the target measuring point. F The axial force of the casing corresponding to the target measuring point. EI The bending stiffness of the casing corresponding to the target measuring point is given, where the additional contact force corresponding to the target measuring point is caused by the buckling of the pipe string with joints or stabilizers.

[0088] (3) Determine the unit length casing contact force corresponding to the target measuring point, and calculate the total contact distribution force corresponding to the target measuring point based on the unit length casing contact force and the additional contact force. That is, sum the unit length casing contact force and the additional contact force corresponding to the target measuring point, and determine the calculation result as the total contact distribution force corresponding to the target measuring point. Also, calculate the basic friction value corresponding to the target measuring point based on the axial friction coefficient corresponding to the target open hole section and the total contact distribution force corresponding to the target measuring point. That is, the product of the axial friction coefficient corresponding to the target open hole section and the total contact distribution force corresponding to the target measuring point is determined as the basic friction value corresponding to the target measuring point. Among them, the axial friction coefficient corresponding to the target open hole section is obtained by inversion based on the drilling data corresponding to the target open hole section. The specific method for determining the unit length casing contact force corresponding to the target measuring point can refer to the prior art, and will not be described in detail in this embodiment.

[0089] It should be noted that since the axial force of the casing corresponding to the measuring point closest to the drill bit is 0, step (1) can be omitted and steps (2) and (3) can be executed directly to determine the basic friction value corresponding to the measuring point closest to the drill bit.

[0090] Finally, the comprehensive friction value corresponding to each measuring point is calculated based on the mechanical resistance value and the foundation friction value corresponding to each measuring point.

[0091] After calculating the basic friction value and casing axial force corresponding to each measuring point, the passability prediction application can calculate the comprehensive friction value corresponding to each measuring point based on the mechanical resistance value and basic friction value corresponding to each measuring point. That is, for any measuring point, the basic friction value and mechanical resistance value corresponding to that measuring point are summed and the calculation result is determined as the comprehensive friction value corresponding to that measuring point.

[0092] Furthermore, in this embodiment of the application, the specific process by which the passability prediction application determines the passability prediction result of the casing running into the target open hole section based on the casing running safety factor, casing axial force, sinusoidal buckling critical load, helical buckling critical load, and comprehensive friction value corresponding to each measuring point is as follows:

[0093] (1) Establish a rectangular coordinate system, and plot the casing axial force curve, sinusoidal buckling critical load curve and helical buckling critical load curve corresponding to multiple measuring points in the rectangular coordinate system according to the well depth value, casing axial force, sinusoidal buckling critical load and helical buckling critical load corresponding to each measuring point;

[0094] (2) When there is an intersection between the casing axial force curve and the sinusoidal buckling critical load curve and / or between the casing axial force curve and the helical buckling critical load curve, the casing running passability prediction result corresponding to the target open hole section is determined to be that there is a casing running risk.

[0095] (3) When the casing running safety factor corresponding to any measuring point is greater than the preset safety factor threshold, the casing running passability prediction result corresponding to the target open hole section is determined to be that there is a casing running risk;

[0096] (4) When the comprehensive friction value corresponding to any measuring point is greater than the preset friction threshold, the casing running passability prediction result corresponding to the target open hole section is determined to be that there is a risk of casing running.

[0097] Furthermore, in this embodiment, multiple wellbore drilling tool configurations are pre-set, and the friction-to-buoyancy ratio corresponding to each pre-set wellbore drilling tool configuration is calculated. For any given wellbore drilling tool configuration, the included drilling tools specifically possess strong anti-sticking performance and a low friction coefficient, such as smooth drill bits or wear-resistant drill tools. When the casing running passability prediction result for the target open hole section indicates a casing running risk, the passability prediction application also needs to first calculate the friction-to-buoyancy ratio corresponding to the casing to be run; then, based on the casing to be run... The target wellbore drilling tool configuration is selected from multiple preset wellbore drilling tool configurations based on the friction-to-buoyancy ratio of the casing to be run. Specifically, the preset wellbore drilling tool configuration with the same friction-to-buoyancy ratio as the casing to be run is identified as the target wellbore drilling tool configuration. The casing to be run is the casing that needs to be run into the target open hole section. Finally, the target wellbore drilling tool configuration is displayed so that operators can select the appropriate wellbore drilling tool based on the target configuration and use the selected tool to perform wellbore cleaning operations on the target open hole section.

[0098] Since the friction-to-buoyancy ratio corresponding to the target wellbore drilling tool configuration is the same as that corresponding to the casing to be run in, the wellbore drilling tool selected according to the target wellbore drilling tool configuration and the casing to be run in have equivalent running capacity. Therefore, after using the wellbore drilling tool selected according to the target wellbore drilling tool configuration to carry out wellbore operation on the target open hole section, it can be guaranteed that the casing to be run in can be successfully run into the target open hole section.

[0099] Furthermore, in this embodiment, the passability prediction application can first calculate the predicted hook load corresponding to each measuring point based on the drilling data and modified mechanical model corresponding to each measuring point; during the process of selecting the well-drilling tool according to the target well-drilling tool configuration to perform well-drilling operations on the target open hole section, the measured hook load corresponding to the current well-drilling depth is obtained, and the predicted hook load corresponding to the current well-drilling depth is determined based on the predicted hook loads corresponding to multiple measuring points, that is, the predicted hook load of the measuring point corresponding to the micro-element segment at the current well-drilling depth is determined as the predicted hook load corresponding to the current well-drilling depth; when the absolute value of the difference between the measured hook load and the predicted hook load corresponding to the current well-drilling depth is greater than a preset error threshold, an alarm is triggered to prompt the staff that the well-drilling tool cannot continue well-drilling operations and that the operating parameters and / or configuration of the well-drilling tool need to be adjusted.

[0100] For any given measuring point, the specific process for calculating the predicted hook load corresponding to that measuring point based on the drilling data and the modified mechanical model is as follows: Set the axial force of the drill string corresponding to that measuring point to 0. Based on the drilling data corresponding to that measuring point, the drilling data corresponding to each measuring point whose well depth is less than that of the corresponding micro-element segment, and the modified mechanical model, calculate the axial force of the drill string corresponding to each measuring point whose well depth is less than that of the corresponding micro-element segment. Then, determine the axial force of the drill string corresponding to the measuring point closest to the surface as the predicted hook load corresponding to that measuring point.

[0101] Furthermore, as a response to the above Figure 1 In addition to the method described above, another embodiment of this application provides a casing run-through predictor. This device embodiment corresponds to the aforementioned method embodiment. For ease of reading, this device embodiment will not repeat the details of the aforementioned method embodiment, but it should be understood that the device in this embodiment can implement all the contents of the aforementioned method embodiment. This device is used to accurately predict the run-through of the target open-hole section of the casing, specifically as follows... Figure 2 As shown, the device includes:

[0102] Acquisition unit 21 is used to acquire drilling data corresponding to each measuring point contained in the target open hole section;

[0103] The first calculation unit 22 is used to calculate the casing axial force, mechanical resistance value and comprehensive friction value corresponding to each measuring point based on the drilling data and the modified mechanical model corresponding to each measuring point. The modified mechanical model is obtained by modifying the conventional mechanical model after taking the additional mechanical resistance generated during the casing running process due to the roughness of the irregular wellbore as an influencing factor.

[0104] The second calculation unit 23 is used to calculate the casing lowering safety factor for each measuring point based on the mechanical resistance value and comprehensive friction value corresponding to each measuring point.

[0105] The third calculation unit 24 is used to calculate the sinusoidal buckling critical load and helical buckling critical load corresponding to each of the measuring points based on the drilling data corresponding to each measuring point.

[0106] The determining unit 25 is used to determine the casing running passability prediction result corresponding to the target open hole section based on the casing running safety factor, casing axial force, sinusoidal buckling critical load, helical buckling critical load and comprehensive friction value corresponding to each measuring point.

[0107] Furthermore, such as Figure 3As shown, the first calculation unit 22 is specifically used to: calculate the wellbore concavity parameter, wellbore curvature parameter and wellbore clearance ratio parameter corresponding to each measuring point based on the drilling data corresponding to each measuring point;

[0108] Substitute the wellbore diameter concavity parameter, wellbore curvature parameter, and wellbore clearance ratio parameter corresponding to each measuring point into the first preset formula to calculate the wellbore roughness value corresponding to each measuring point;

[0109] Calculate the mechanical resistance value corresponding to each measuring point based on the preset mechanical resistance coefficient and the wellbore roughness value corresponding to each measuring point;

[0110] Calculate the basic friction value and axial force of the casing corresponding to each measuring point based on the mechanical resistance value corresponding to each measuring point and the modified mechanical model;

[0111] Calculate the comprehensive friction value corresponding to each measuring point based on the mechanical resistance value and the basic friction value corresponding to each measuring point.

[0112] Furthermore, such as Figure 3 As shown, the first calculation unit 22 is specifically used to: substitute the basic friction value corresponding to the previous measuring point, the micro-segment length corresponding to the target measuring point, the casing bending stiffness, the normalized wellbore curvature parameter, the casing linear weight, the well inclination angle and the mechanical resistance value into the modified mechanical model to calculate the casing axial force corresponding to the target measuring point;

[0113] Substitute the casing axial force, casing borehole radial clearance, and casing bending stiffness corresponding to the target measuring point into the second preset formula to calculate the additional contact force corresponding to the target measuring point.

[0114] Determine the contact force per unit length of the sleeve corresponding to the target measuring point;

[0115] Calculate the total contact force distribution corresponding to the target measuring point based on the unit length sleeve contact force and additional contact force corresponding to the target measuring point;

[0116] The basic friction value corresponding to the target measuring point is calculated based on the axial friction coefficient corresponding to the target open hole section and the total contact distribution force corresponding to the target measuring point.

[0117] Furthermore, such as Figure 3 As shown, the first calculation unit 22 is specifically used to: normalize the well diameter concavity parameters corresponding to multiple measuring points to obtain the normalized well diameter concavity parameters corresponding to each measuring point;

[0118] The wellbore curvature parameters corresponding to multiple measuring points are normalized to obtain the normalized wellbore curvature parameters corresponding to each measuring point.

[0119] The wellbore clearance ratio parameters corresponding to multiple measuring points are normalized to obtain the normalized wellbore clearance ratio parameters corresponding to each measuring point.

[0120] The normalized wellbore concavity parameter, normalized wellbore curvature parameter, and normalized wellbore clearance ratio parameter corresponding to each measuring point are substituted into the first preset formula to calculate the wellbore roughness value corresponding to each measuring point.

[0121] Furthermore, such as Figure 3 As shown, the determining unit 25 is specifically used to: establish a rectangular coordinate system, and plot the casing axial force curve, sinusoidal buckling critical load curve and helical buckling critical load curve corresponding to multiple measuring points in the rectangular coordinate system according to the well depth value, casing axial force, sinusoidal buckling critical load and helical buckling critical load corresponding to each measuring point;

[0122] When there is an intersection between the casing axial force curve and the sinusoidal buckling critical load curve and / or between the casing axial force curve and the helical buckling critical load curve, the casing running passability prediction result corresponding to the target open hole section is determined to be that there is a casing running risk.

[0123] When the casing running safety factor corresponding to any measuring point is greater than the preset safety factor threshold, the casing running passability prediction result corresponding to the target open hole section is determined to be a case running risk.

[0124] When the comprehensive friction value corresponding to any measuring point is greater than the preset friction threshold, the casing running passability prediction result corresponding to the target open hole section is determined to be that there is a casing running risk.

[0125] Furthermore, such as Figure 3 As shown, the device also includes:

[0126] Selecting unit 26 is used to calculate the friction buoyancy ratio of the casing to be run when the casing running passability prediction result for the target open hole section is that there is a risk of casing running.

[0127] Based on the friction-to-buoyancy ratio of the casing to be run, a target wellbore configuration is selected from multiple preset wellbore configurations, wherein the friction-to-buoyancy ratio of the target wellbore configuration is the same as that of the casing to be run.

[0128] The output displays the target wellbore configuration, allowing operators to select the appropriate wellbore tool based on the configuration and use it to perform wellbore cleaning operations on the target open hole section.

[0129] Furthermore, such as Figure 3 As shown, the device also includes:

[0130] Alarm unit 27 is used to calculate the predicted hook load corresponding to each measuring point based on the drilling data corresponding to each measuring point and the modified mechanical model;

[0131] Obtain the measured hook load corresponding to the current well depth during well cleaning operations;

[0132] The predicted hook load corresponding to the current well depth is determined based on the predicted hook load corresponding to multiple measuring points.

[0133] An alarm is triggered when the absolute value of the difference between the measured hook load and the predicted hook load corresponding to the current well depth exceeds a preset error threshold, prompting the operator to adjust the operating parameters and / or configuration of the well cleaning tool.

[0134] This application provides a casing running passability prediction method and apparatus. After obtaining drilling data corresponding to each measuring point within the target open hole section using a passability prediction application, the application first calculates the casing axial force, mechanical resistance value, and comprehensive friction value for each measuring point based on the drilling data and a modified mechanical model. Then, it calculates the casing running safety factor for each measuring point based on the mechanical resistance value and comprehensive friction value, and calculates the sinusoidal buckling critical load and helical buckling critical load for each measuring point based on the drilling data. Finally, it determines the casing running passability prediction result for the target open hole section based on the casing running safety factor, casing axial force, sinusoidal buckling critical load, helical buckling critical load, and comprehensive friction value for each measuring point. Because the roughness of irregular wellbores in this embodiment of the application considers the additional mechanical resistance generated during the casing running process due to the roughness of the irregular wellbore, which affects the friction value during the casing running process, the conventional mechanical model is modified by taking the additional mechanical resistance generated during the casing running process due to the roughness of the irregular wellbore as an influencing factor, resulting in a modified mechanical model. Based on the modified mechanical model and the drilling data corresponding to each measuring point in the target open hole section, the casing axial force, mechanical resistance value and comprehensive friction value corresponding to each measuring point are predicted. The casing running passability prediction result corresponding to the target open hole section is determined according to the casing running safety factor, casing axial force, sinusoidal buckling critical load, helical buckling critical load and comprehensive friction value corresponding to each measuring point. This makes it possible to accurately predict the passability of the casing running into the target open hole section by considering the influence of irregular wellbores in the process of predicting the passability of the casing running into the target open hole section.

[0135] This application provides a computer device, which includes a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs the following steps:

[0136] Obtain drilling data corresponding to each measuring point within the target open-hole section;

[0137] The casing axial force, mechanical resistance value and comprehensive friction value corresponding to each measuring point are calculated based on the drilling data and the modified mechanical model corresponding to each measuring point. The modified mechanical model is obtained by modifying the conventional mechanical model after taking the additional mechanical resistance generated during the casing running process due to the roughness of the irregular wellbore as an influencing factor.

[0138] Calculate the casing insertion safety factor for each measuring point based on the mechanical resistance value and the comprehensive friction value corresponding to each measuring point.

[0139] Calculate the sinusoidal buckling critical load and helical buckling critical load for each measuring point based on the drilling data corresponding to each measuring point;

[0140] The casing running passability prediction result for the target open hole section is determined based on the casing running safety factor, casing axial force, sinusoidal buckling critical load, helical buckling critical load, and comprehensive friction value corresponding to each measuring point.

[0141] Furthermore, the step of calculating the casing axial force, mechanical resistance value, and comprehensive friction value corresponding to each measuring point based on the drilling data and modified mechanical model corresponding to each measuring point includes:

[0142] Calculate the wellbore concavity parameter, wellbore curvature parameter, and wellbore clearance ratio parameter for each measuring point based on the drilling data corresponding to each measuring point.

[0143] Substitute the wellbore diameter concavity parameter, wellbore curvature parameter, and wellbore clearance ratio parameter corresponding to each measuring point into the first preset formula to calculate the wellbore roughness value corresponding to each measuring point;

[0144] Calculate the mechanical resistance value corresponding to each measuring point based on the preset mechanical resistance coefficient and the wellbore roughness value corresponding to each measuring point;

[0145] Calculate the basic friction value and axial force of the casing corresponding to each measuring point based on the mechanical resistance value corresponding to each measuring point and the modified mechanical model;

[0146] Calculate the comprehensive friction value corresponding to each measuring point based on the mechanical resistance value and the basic friction value corresponding to each measuring point.

[0147] Furthermore, the step of calculating the basic friction value and casing axial force corresponding to each measuring point based on the mechanical resistance value corresponding to each measuring point and the modified mechanical model includes:

[0148] Substitute the basic friction value corresponding to the previous measuring point, the micro-segment length corresponding to the target measuring point, the casing bending stiffness, the normalized wellbore curvature parameter, the casing linear weight, the well inclination angle, and the mechanical resistance value into the modified mechanical model to calculate the casing axial force corresponding to the target measuring point.

[0149] Substitute the casing axial force, casing borehole radial clearance, and casing bending stiffness corresponding to the target measuring point into the second preset formula to calculate the additional contact force corresponding to the target measuring point.

[0150] Determine the contact force per unit length of the sleeve corresponding to the target measuring point;

[0151] Calculate the total contact force distribution corresponding to the target measuring point based on the unit length sleeve contact force and additional contact force corresponding to the target measuring point;

[0152] The basic friction value corresponding to the target measuring point is calculated based on the axial friction coefficient corresponding to the target open hole section and the total contact distribution force corresponding to the target measuring point.

[0153] Furthermore, the step of substituting the wellbore diameter concavity parameter, wellbore curvature parameter, and wellbore clearance ratio parameter corresponding to each measuring point into the first preset formula to calculate the wellbore roughness value corresponding to each measuring point includes:

[0154] The wellbore concavity parameters corresponding to multiple measuring points are normalized to obtain the normalized wellbore concavity parameters corresponding to each measuring point.

[0155] The wellbore curvature parameters corresponding to multiple measuring points are normalized to obtain the normalized wellbore curvature parameters corresponding to each measuring point.

[0156] The wellbore clearance ratio parameters corresponding to multiple measuring points are normalized to obtain the normalized wellbore clearance ratio parameters corresponding to each measuring point.

[0157] The normalized wellbore concavity parameter, normalized wellbore curvature parameter, and normalized wellbore clearance ratio parameter corresponding to each measuring point are substituted into the first preset formula to calculate the wellbore roughness value corresponding to each measuring point.

[0158] Furthermore, the step of determining the casing running passability prediction result corresponding to the target open hole section based on the casing running safety factor, casing axial force, sinusoidal buckling critical load, helical buckling critical load, and comprehensive friction value corresponding to each measuring point includes:

[0159] Establish a rectangular coordinate system, and plot the casing axial force curve, sinusoidal buckling critical load curve, and helical buckling critical load curve corresponding to each measuring point in the rectangular coordinate system.

[0160] When there is an intersection between the casing axial force curve and the sinusoidal buckling critical load curve and / or between the casing axial force curve and the helical buckling critical load curve, the casing running passability prediction result corresponding to the target open hole section is determined to be that there is a casing running risk.

[0161] When the casing running safety factor corresponding to any measuring point is greater than the preset safety factor threshold, the casing running passability prediction result corresponding to the target open hole section is determined to be a case running risk.

[0162] When the comprehensive friction value corresponding to any measuring point is greater than the preset friction threshold, the casing running passability prediction result corresponding to the target open hole section is determined to be that there is a casing running risk.

[0163] Furthermore, the method also includes:

[0164] When the casing running passability prediction result for the target open hole section is that there is a risk of casing running, calculate the friction buoyancy ratio of the casing to be run.

[0165] Based on the friction-to-buoyancy ratio of the casing to be run, a target wellbore configuration is selected from multiple preset wellbore configurations, wherein the friction-to-buoyancy ratio of the target wellbore configuration is the same as that of the casing to be run.

[0166] The output displays the target wellbore configuration, allowing operators to select the appropriate wellbore tool based on the configuration and use it to perform wellbore cleaning operations on the target open hole section.

[0167] Furthermore, the method also includes:

[0168] The predicted hook load for each measuring point is calculated based on the drilling data corresponding to each measuring point and the modified mechanical model.

[0169] Obtain the measured hook load corresponding to the current well depth during well cleaning operations;

[0170] The predicted hook load corresponding to the current well depth is determined based on the predicted hook load corresponding to multiple measuring points.

[0171] An alarm is triggered when the absolute value of the difference between the measured hook load and the predicted hook load corresponding to the current well depth exceeds a preset error threshold, prompting the operator to adjust the operating parameters and / or configuration of the well cleaning tool.

[0172] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the aforementioned cannula insertion passability prediction method.

[0173] This application also provides a computer program product, which, when executed on a data processing device, is suitable for executing program code that initializes the following steps: acquiring drilling data corresponding to each measuring point contained in the target open hole section; calculating the casing axial force, mechanical resistance value, and comprehensive friction value corresponding to each measuring point based on the drilling data corresponding to each measuring point and a modified mechanical model, wherein the modified mechanical model is obtained by correcting a conventional mechanical model by taking the additional mechanical resistance generated during the casing running process due to the roughness of the irregular wellbore as an influencing factor; calculating the casing running safety factor corresponding to each measuring point based on the mechanical resistance value and comprehensive friction value corresponding to each measuring point; calculating the sinusoidal buckling critical load and helical buckling critical load corresponding to each measuring point based on the drilling data corresponding to each measuring point; and determining the casing running passability prediction result corresponding to the target open hole section based on the casing running safety factor, casing axial force, sinusoidal buckling critical load, helical buckling critical load, and comprehensive friction value corresponding to each measuring point.

[0174] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0175] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1A device that provides the functions specified in one or more boxes.

[0176] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0177] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0178] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0179] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0180] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0181] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0182] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0183] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for predicting the passability of casing insertion, characterized in that, The method includes: Obtain drilling data corresponding to each measuring point within the target open-hole section; The casing axial force, mechanical resistance value and comprehensive friction value corresponding to each measuring point are calculated based on the drilling data and the modified mechanical model corresponding to each measuring point. The modified mechanical model is obtained by modifying the conventional mechanical model after taking the additional mechanical resistance generated during the casing running process due to the roughness of the irregular wellbore as an influencing factor. Calculate the casing insertion safety factor for each measuring point based on the mechanical resistance value and the comprehensive friction value corresponding to each measuring point. Calculate the sinusoidal buckling critical load and helical buckling critical load for each measuring point based on the drilling data corresponding to each measuring point; The casing running passability prediction result for the target open hole section is determined based on the casing running safety factor, casing axial force, sinusoidal buckling critical load, helical buckling critical load and comprehensive friction value corresponding to each measuring point. Based on the drilling data and modified mechanical model corresponding to each measuring point, the casing axial force, mechanical resistance value, and comprehensive friction value corresponding to each measuring point are calculated, including: Calculate the wellbore concavity parameter, wellbore curvature parameter, and wellbore clearance ratio parameter for each measuring point based on the drilling data corresponding to each measuring point. Substitute the wellbore diameter concavity parameter, wellbore curvature parameter, and wellbore clearance ratio parameter corresponding to each measuring point into the first preset formula to calculate the wellbore roughness value corresponding to each measuring point; Calculate the mechanical resistance value corresponding to each measuring point based on the preset mechanical resistance coefficient and the wellbore roughness value corresponding to each measuring point; Calculate the basic friction value and axial force of the casing corresponding to each measuring point based on the mechanical resistance value corresponding to each measuring point and the modified mechanical model; Calculate the comprehensive friction value corresponding to each measuring point based on the mechanical resistance value and the basic friction value corresponding to each measuring point; The determination of the casing running passability prediction result for the target open hole section based on the casing running safety factor, casing axial force, sinusoidal buckling critical load, helical buckling critical load, and comprehensive friction value corresponding to each measuring point includes: Establish a rectangular coordinate system, and plot the casing axial force curve, sinusoidal buckling critical load curve, and helical buckling critical load curve corresponding to each measuring point in the rectangular coordinate system. When there is an intersection between the casing axial force curve and the sinusoidal buckling critical load curve and / or between the casing axial force curve and the helical buckling critical load curve, the casing running passability prediction result corresponding to the target open hole section is determined to be that there is a casing running risk. When the casing running safety factor corresponding to any measuring point is greater than the preset safety factor threshold, the casing running passability prediction result corresponding to the target open hole section is determined to be a case running risk. When the comprehensive friction value corresponding to any measuring point is greater than the preset friction threshold, the casing running passability prediction result corresponding to the target open hole section is determined to be that there is a casing running risk.

2. The method according to claim 1, characterized in that, The calculation of the basic friction value and casing axial force corresponding to each measuring point based on the mechanical resistance value corresponding to each measuring point and the modified mechanical model includes: Substitute the basic friction value corresponding to the previous measuring point, the micro-segment length corresponding to the target measuring point, the casing bending stiffness, the normalized wellbore curvature parameter, the casing linear weight, the well inclination angle, and the mechanical resistance value into the modified mechanical model to calculate the casing axial force corresponding to the target measuring point. Substitute the casing axial force, casing borehole radial clearance, and casing bending stiffness corresponding to the target measuring point into the second preset formula to calculate the additional contact force corresponding to the target measuring point. Determine the contact force per unit length of the sleeve corresponding to the target measuring point; Calculate the total contact force distribution corresponding to the target measuring point based on the unit length sleeve contact force and additional contact force corresponding to the target measuring point; The basic friction value corresponding to the target measuring point is calculated based on the axial friction coefficient corresponding to the target open hole section and the total contact distribution force corresponding to the target measuring point.

3. The method according to claim 1, characterized in that, The step of substituting the wellbore diameter concavity parameter, wellbore curvature parameter, and wellbore clearance ratio parameter corresponding to each measuring point into the first preset formula to calculate the wellbore roughness value corresponding to each measuring point includes: The wellbore concavity parameters corresponding to multiple measuring points are normalized to obtain the normalized wellbore concavity parameters corresponding to each measuring point. The wellbore curvature parameters corresponding to multiple measuring points are normalized to obtain the normalized wellbore curvature parameters corresponding to each measuring point. The wellbore clearance ratio parameters corresponding to multiple measuring points are normalized to obtain the normalized wellbore clearance ratio parameters corresponding to each measuring point. The normalized wellbore concavity parameter, normalized wellbore curvature parameter, and normalized wellbore clearance ratio parameter corresponding to each measuring point are substituted into the first preset formula to calculate the wellbore roughness value corresponding to each measuring point.

4. The method according to claim 1, characterized in that, The method further includes: When the casing running passability prediction result for the target open hole section is that there is a risk of casing running, calculate the friction buoyancy ratio of the casing to be run. Based on the friction-to-buoyancy ratio of the casing to be run, a target wellbore configuration is selected from multiple preset wellbore configurations, wherein the friction-to-buoyancy ratio of the target wellbore configuration is the same as that of the casing to be run. The output displays the target wellbore configuration, allowing operators to select the appropriate wellbore tool based on the configuration and use it to perform wellbore cleaning operations on the target open hole section.

5. The method according to claim 1, characterized in that, The method further includes: The predicted hook load for each measuring point is calculated based on the drilling data corresponding to each measuring point and the modified mechanical model. Obtain the measured hook load corresponding to the current well depth during well cleaning operations; The predicted hook load corresponding to the current well depth is determined based on the predicted hook load corresponding to multiple measuring points. An alarm is triggered when the absolute value of the difference between the measured hook load and the predicted hook load corresponding to the current well depth exceeds a preset error threshold, prompting the operator to adjust the operating parameters and / or configuration of the well cleaning tool.

6. A casing insertion passability prediction device, characterized in that, The device includes: The acquisition unit is used to acquire drilling data corresponding to each measuring point contained in the target open-hole section; The first calculation unit is used to calculate the casing axial force, mechanical resistance value and comprehensive friction value corresponding to each measuring point based on the drilling data and the modified mechanical model corresponding to each measuring point. The modified mechanical model is obtained by modifying the conventional mechanical model by taking the additional mechanical resistance generated during the casing running process due to the roughness of the irregular wellbore as an influencing factor. The second calculation unit is used to calculate the casing lowering safety factor for each measuring point based on the mechanical resistance value and the comprehensive friction value corresponding to each measuring point. The third calculation unit is used to calculate the sinusoidal buckling critical load and helical buckling critical load corresponding to each of the measuring points based on the drilling data corresponding to each measuring point. The determination unit is used to determine the casing running passability prediction result corresponding to the target open hole section based on the casing running safety factor, casing axial force, sinusoidal buckling critical load, helical buckling critical load and comprehensive friction value corresponding to each measuring point. The first computing unit is further configured to: Calculate the wellbore concavity parameter, wellbore curvature parameter, and wellbore clearance ratio parameter for each measuring point based on the drilling data corresponding to each measuring point. Substitute the wellbore diameter concavity parameter, wellbore curvature parameter, and wellbore clearance ratio parameter corresponding to each measuring point into the first preset formula to calculate the wellbore roughness value corresponding to each measuring point; Calculate the mechanical resistance value corresponding to each measuring point based on the preset mechanical resistance coefficient and the wellbore roughness value corresponding to each measuring point; Calculate the basic friction value and axial force of the casing corresponding to each measuring point based on the mechanical resistance value corresponding to each measuring point and the modified mechanical model; Calculate the comprehensive friction value corresponding to each measuring point based on the mechanical resistance value and the basic friction value corresponding to each measuring point; The determining unit is further configured to: Establish a rectangular coordinate system, and plot the casing axial force curve, sinusoidal buckling critical load curve, and helical buckling critical load curve corresponding to each measuring point in the rectangular coordinate system. When there is an intersection between the casing axial force curve and the sinusoidal buckling critical load curve and / or between the casing axial force curve and the helical buckling critical load curve, the casing running passability prediction result corresponding to the target open hole section is determined to be that there is a casing running risk. When the casing running safety factor corresponding to any measuring point is greater than the preset safety factor threshold, the casing running passability prediction result corresponding to the target open hole section is determined to be a case running risk. When the comprehensive friction value corresponding to any measuring point is greater than the preset friction threshold, the casing running passability prediction result corresponding to the target open hole section is determined to be that there is a casing running risk.

7. A computer device, comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement the steps of the method according to any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

9. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

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