Drill torque determination method and system, electronic equipment and storage medium

Abstract

The invention discloses a drill torque determination method and system, electronic equipment and a storage medium, and belongs to the technical field of oil field drilling, and the method comprises the steps: determining a ground torque Ts1 when bit pressure is not applied and a ground torque Ts2 when specific bit pressure is applied under a specific rotating speed condition by combining a field comprehensive logging torque parameter; frictional resistance moments Tf1 and Tf2 of the drill column and the well wall are determined according to the stress characteristic analysis of the whole-well drill column under the specific drilling pressure and rotating speed conditions, and then the drill torque of the drill column structure under the drilling parameter conditions is obtained through calculation according to a formula; the underground torque borne by the drill bit in the drilling process under different well conditions, depths and layers can be better determined, and the method has important significance in determining the real working state of the drill bit, improving the drilling efficiency and ensuring smooth on-site operation.

Description

Technical Field

[0001] This invention belongs to the field of oilfield drilling technology, specifically relating to a method, system, electronic device, and storage medium for determining drill bit torque. Background Technology

[0002] Determining the drill bit torque is crucial for drill string mechanics analysis. Currently, the following empirical formula is commonly used for calculating drill bit torque:

[0003] T b =K·D c ·W b / 6 (1)

[0004] In the formula D c W represents the outer diameter of the drill bit, in meters (m). b The drilling pressure is expressed in kN; K is an empirical coefficient, which is 0.5 to 1 when using PDC drill bits and 0.2 when using roller cone drill bits.

[0005] Equation (1) shows that the drill bit torque is linearly related to the drill bit outer diameter and drilling pressure; the larger the drill bit outer diameter and drilling pressure, the greater the drill bit torque. However, this single-form drill bit torque calculation formula obviously cannot take into account all situations under different well conditions, depths, and formations. In addition, the values ​​of the coefficients for different working conditions lack a basis, and the influence of rotational speed is not considered in the formula. When analyzing the collected data, it was found that the actual drill bit torque of many wells differed greatly from the value calculated by the empirical formula. At the same time, it was found that the variation law of drill bit torque with drilling pressure was not the same under different well conditions, depths, formations, and rotational speeds, making it difficult to express with a unified formula.

[0006] Determining the drill bit torque is crucial for drill string mechanics analysis. Currently, the calculation of drill bit torque generally uses empirical formulas that show a linear relationship between the drill bit's outer diameter and drilling pressure. However, this single-form formula obviously cannot take into account different well conditions, depths, formations, rotational speeds, etc., and the values ​​of the coefficients also lack a basis. Summary of the Invention

[0007] The purpose of this invention is to solve the problems in the prior art by providing a method, system, electronic device and storage medium for determining drill bit torque, so as to solve the technical problems that the calculation form of drill bit torque in the prior art is singular, unable to take into account different well conditions, depths, formations, rotation speeds and other conditions, and the values ​​of coefficients also lack a basis.

[0008] To achieve the above objectives, the present invention employs the following technical solution:

[0009] A method for determining drill bit torque includes the following steps:

[0010] Obtain drill string structure parameters, wellbore trajectory parameters, surface torque T under no-drill pressure and specific rotation speed conditions. s1 And the surface torque T under specific drilling pressure and rotation speed conditions s2 ;

[0011] The frictional resistance torque T between the drill string and the wellbore is determined based on the drill string structure parameters and wellbore trajectory parameters under no-breach-pressure and specific rotation speed conditions. f1 The frictional resistance torque T between the drill string and the wellbore under specific drilling pressure and rotation speed conditions. f2 ;

[0012] Based on the ground torque T under no drilling pressure and specific rotational speed conditions s1 and the frictional resistance torque T between the drill string and the wellbore f1 And the surface torque T under specific drilling pressure and rotation speed conditions. s2 and the frictional resistance torque T between the drill string and the wellbore f2 Determine the drill bit torque T of this drill string structure under specific drilling pressure and rotational speed conditions. b .

[0013] Preferably, the ground torque T under the condition of no drilling pressure and a specific rotational speed is... s1 Drilling fluid resistance torque T m1 The frictional resistance torque T between the drill string and the wellbore f1 Composition; the ground torque T under specific drilling pressure and rotation speed conditions. s2 The drill bit torque T b Drilling fluid resistance torque T m2 The frictional resistance torque T between the drill string and the wellbore f2 composition.

[0014] Preferably, under the same drilling fluid parameters, drill string structure, and drill string rotation speed, the drilling fluid resistance torque is equal, i.e., T. m1 =T m2 .

[0015] Preferably, the step of determining the drill bit torque T under specific drilling pressure and rotational speed conditions of the drill string structure is... b Specifically:

[0016] T b =(T s2 -T s1 )-(T f2 -T f1 )

[0017] Among them, T b T represents the drill bit torque. s1 The surface torque under conditions of no drilling pressure and a specific rotational speed; T s2 To apply surface torque under specific drilling pressure and rotation speed conditions; T f1The frictional resistance torque between the drill string and the wellbore under conditions of no drilling pressure and a specific rotational speed; T f2 This refers to the frictional resistance torque between the drill string and the wellbore under specific drilling pressure and rotation speed conditions.

[0018] Preferably, the drill string structural parameters include the outer diameter, inner diameter, and length of each part of the drill string.

[0019] Preferably, the wellbore trajectory parameters include depth, inclination angle, and azimuth angle.

[0020] Preferably, the step of obtaining the ground torque T under conditions of no drilling pressure and a specific rotational speed is... s1， Specifically, 60 seconds of logging data are taken and the average value is used as the surface torque value under that rotational speed and drilling pressure.

[0021] The ground torque T obtained under conditions of increased drilling pressure and specific rotational speed is described. s2， Specifically, 60 seconds of logging data are taken and the average value is used as the surface torque value under that rotational speed and drilling pressure.

[0022] A system for determining drill bit torque, comprising:

[0023] The acquisition unit is used to acquire drill string structure parameters, wellbore trajectory parameters, surface torque T under no-drill pressure and specific rotational speed conditions. s1 And the surface torque T under specific drilling pressure and rotation speed conditions s2 ;

[0024] The resistance torque calculation unit is used to determine the frictional resistance torque T between the drill string and the wellbore under conditions of no drilling pressure and specific rotational speed, based on drill string structural parameters and wellbore trajectory parameters. f1 The frictional resistance torque T between the drill string and the wellbore under specific drilling pressure and rotation speed conditions. f2 ;

[0025] The torque calculation unit is used to calculate the surface torque T under conditions of no drilling pressure and a specific rotational speed. s1 and the frictional resistance torque T between the drill string and the wellbore f1 And the surface torque T under specific drilling pressure and rotation speed conditions. s2 and the frictional resistance torque T between the drill string and the wellbore f2 Determine the drill bit torque T of this drill string structure under specific drilling pressure and rotational speed conditions. b .

[0026] An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the steps of the method for determining the drill bit torque described above.

[0027] A computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the method for determining drill bit torque described above.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] This invention provides a method for determining drill bit torque, which can better determine the magnitude of downhole torque experienced by the drill bit during drilling under different well conditions, depths, and formations. It combines on-site comprehensive logging torque parameters to determine the surface torque T under specific rotational speed conditions without pressure on the drill bit. s1 and the surface torque T when a specific drilling pressure is applied s2 Based on the force characteristics analysis of the drill string under specific drilling pressure and rotation speed conditions, the frictional resistance torque T between the drill string and the wellbore is determined. f1 and T f2 Then, the drill bit torque of the drill string structure under the drilling parameters is calculated using the formula. This is of great significance for determining the actual working state of the drill bit, improving drilling efficiency, and ensuring the smooth progress of field operations. Based on the comprehensive logging torque parameters, the surface torque under specific drilling pressure and rotational speed conditions is determined. Combined with the actual drill string structure and wellbore trajectory characteristics, and based on the analysis of the stress characteristics of the entire drill string under different working conditions, the drill bit torque value is determined using the calculation formula proposed in this invention. This provides a basis for field operations and better guides field production. It solves the technical problems of existing technologies where the drill bit torque calculation method is singular, unable to consider different well conditions, depths, formations, rotational speeds, etc., and the selection of coefficient values ​​lacks a basis. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a flowchart of the method of the present invention;

[0032] Figure 2 This is a schematic diagram of the three-dimensional wellbore trajectory of a certain well;

[0033] Figure 3 This is a schematic diagram of the inclination angle characteristics of a certain well.

[0034] Figure 4 This is a schematic diagram of the azimuth characteristics of a certain well.

[0035] Figure 5 This is surface torque logging data under conditions of no drilling pressure and a rotation speed of 60 rpm;

[0036] Figure 6 Surface torque logging data under drilling conditions of 120kN drilling pressure and 60rpm rotation speed;

[0037] Figure 7 This is a diagram showing the distribution of frictional resistance torque between the drill string and the wellbore under conditions of no drilling pressure and a drilling speed of 60 rpm.

[0038] Figure 8 This is a diagram showing the distribution of frictional resistance torque between the drill string and the wellbore under the conditions of 120kN drilling pressure and 60rpm rotation speed. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0043] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0044] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0045] The present invention will now be described in further detail with reference to the accompanying drawings:

[0046] To accurately calculate the torque on the drill bit, this invention selects the surface torque T under specific rotational speed conditions without drill pressure based on comprehensive on-site logging torque parameters. s1 and the surface torque T when a specific drilling pressure is applied s2 The frictional resistance torque T between the drill string and the wellbore was determined by analyzing the stress characteristics of the drill string under specific drilling pressure and rotation speed conditions. f1 and T f2 This allows for the calculation of the drill bit torque of the drill string structure under the specified drilling parameters, thus providing better guidance for on-site production.

[0047] See Figure 1 The method for determining drill bit torque disclosed in this application includes the following steps:

[0048] S1: Obtain drill string structure parameters, wellbore trajectory parameters, surface torque T under no-drill pressure and specific rotational speed conditions. s1 And the surface torque T under specific drilling pressure and rotation speed conditions s2 ;

[0049] S2: Determine the frictional resistance torque T between the drill string and the wellbore under no-pressure-to-drill and specific rotation speed conditions based on the drill string structure parameters and wellbore trajectory parameters. f1 The frictional resistance torque T between the drill string and the wellbore under specific drilling pressure and rotation speed conditions. f2 ;

[0050] S3: Based on the ground torque T under no-drill-pressure and specific rotational speed conditions. s1 and the frictional resistance torque T between the drill string and the wellbore f1 And the surface torque T under specific drilling pressure and rotation speed conditions. s2 and the frictional resistance torque T between the drill string and the wellbore f2 Determine the drill bit torque T of this drill string structure under specific drilling pressure and rotational speed conditions. b .

[0051] This application combines on-site integrated logging torque parameters to determine the surface torque T under specific rotational speed conditions without drilling pressure. s1and the surface torque T when a specific drilling pressure is applied s2 Based on the force characteristics analysis of the drill string under specific drilling pressure and rotation speed conditions, the frictional resistance torque T between the drill string and the wellbore is determined. f1 and T f2 Then, the drill bit torque of the drill string structure under the given drilling parameters is calculated using the formula. This allows for a better determination of the downhole torque experienced by the drill bit during drilling under different well conditions, depths, and formations. This is of great significance for determining the actual working state of the drill bit, improving drilling efficiency, and ensuring the smooth progress of field operations.

[0052] In some embodiments, the ground torque T under no-drill-pressure, specific rotational speed conditions s1 Drilling fluid resistance torque T m1 The frictional resistance torque T between the drill string and the wellbore f1 Composition, namely T s1 =T m1 +T f1 The ground torque T under specific drilling pressure and rotation speed conditions. s2 The drill bit torque T b Drilling fluid resistance torque T m2 The frictional resistance torque T between the drill string and the wellbore f2 Composition, namely T s2 =T b +T m2 +T f2 .

[0053] In some embodiments, the comprehensive logging torque parameter is an important parameter in engineering logging, reflecting the variation of surface torque under different drilling conditions. Specifically, the surface torque T without drilling pressure is... s1 Drilling fluid resistance torque T m1 The frictional resistance torque T between the drill string and the wellbore f1 Composition, namely T s1 =T m1 +T f1 The ground torque T during drilling pressure is... s2 The drill bit torque T b Drilling fluid resistance torque T m2 The frictional resistance torque T between the drill string and the wellbore f2 Composition, namely T s2 =T b +T m2 +T f2 Under the same drilling fluid parameters, drill string structure, and drill string rotation speed, the drilling fluid resistance torque can be considered equal, i.e., T. m1 =T m2 .

[0054] Therefore, combining the above expression, we can obtain the formula for calculating drill bit torque:

[0055] T b =(T s2 -T s1 )-(T f2 -T f1 (2)

[0056] In some embodiments, a method for determining drill bit torque uses full-well drill string stress characteristic analysis to determine the frictional resistance torque T between the drill string and the wellbore wall under conditions of no drilling pressure and with drilling pressure. f1 and T f2 The drill bit torque value is determined by combining the comprehensive logging torque parameters from the site. The specific steps are as follows:

[0057] 1) Determine or measure drill string structural parameters: Determine the drill string structure based on the drill string assembly design in the drilling design, or use measuring tools to measure the outer diameter, inner diameter, length, etc. of each part of the drill string;

[0058] 2) Determine the designed wellbore trajectory or measure the wellbore trajectory parameters: Determine the wellbore trajectory parameters based on the drilling design, or use measuring tools to measure and determine the actual wellbore trajectory parameters, including depth, inclination angle, azimuth angle, etc.

[0059] 3) Use a comprehensive logging tool to measure the surface torque (idle torque) under no-drill-pressure and specific rotation speed conditions on-site. Take 60 seconds of logging data and use the average value as the surface torque value at that rotation speed and drill-pressure. The surface torque T at this time is... s1 Drilling fluid resistance torque T m1 and the frictional resistance torque T between the drill string and the wellbore f1 Composition, namely T s1 =T m1 +T f1 ;

[0060] 4) Use a comprehensive logging tool to measure the surface torque under specific drilling pressure and rotation speed conditions on-site. Take 60 seconds of logging data and use the average value as the surface torque value under that rotation speed and drilling pressure. The surface torque T at this time is... s2 The drill bit torque T b Drilling fluid resistance torque T m2 and the frictional resistance torque T between the drill string and the wellbore f2 Composition, namely T s2 =T b +T m2 +T f2 ;

[0061] 5) Based on the actual drill string structure and wellbore trajectory characteristics, analyze the stress characteristics of the entire drill string under conditions of no drilling pressure and a specific rotational speed, and determine the frictional resistance torque T between the drill string and the wellbore. f1 ;

[0062] 6) Based on the actual drill string structure and wellbore trajectory characteristics, analyze the stress characteristics of the drill string throughout the well under specific drilling pressure and rotation speed conditions, and determine the frictional resistance torque T between the drill string and the wellbore. f2 ;

[0063] 7) According to the drill bit torque calculation formula T b =(T s2 -T s1 )-(T f2 -T f1 The drill bit torque of the drill string structure under specific drilling pressure and rotation speed conditions is calculated and determined.

[0064]

Example

[0065] To make the content of this invention easier to understand, the invention patent will be described in detail below with reference to the accompanying drawings and embodiments.

[0066] Determine the drill bit torque of a test well (3276m deep, N2k stratigraphic position) under the conditions of 120kN drilling pressure and 60rpm rotation speed.

[0067] 1) Measuring drill string structural parameters: Using measuring tools, the outer diameter, inner diameter, length, etc., of each part of the drill string are measured to obtain the drill string assembly for this well section:

[0068] 2) Measuring wellbore trajectory parameters: Using measuring tools, the actual wellbore trajectory parameters such as depth, inclination angle, and azimuth angle are measured and determined as shown in Table 1, and the wellbore trajectory is plotted as follows. Figure 2 As shown, the well inclination angle characteristics are as follows: Figure 3 As shown, the azimuth features are as follows Figure 4 As shown;

[0069] Table 1 Actual wellbore trajectory data for a certain well

[0070]

[0071]

[0072] Note: There is a large amount of actual wellbore trajectory data, with approximately one data point every 30m. Due to space limitations, only a portion of the actual measured wellbore trajectory data is listed here.

[0073] 3) Use a comprehensive logging tool to measure the surface torque (idle torque) under conditions of no drilling pressure and a rotation speed of 60 rpm in the field, and take 60 seconds of logging data as follows: Figure 5 As shown, the average value is taken as the ground torque value under this rotational speed and drilling pressure, which is 9.40 kN·m. At this time, the ground torque T... s1 Drilling fluid resistance torque T m1and the frictional resistance torque T between the drill string and the wellbore f1 Composition, namely T s1 =T m1 +T f1 ;

[0074] 4) Use a comprehensive logging tool to measure the surface torque under conditions of 120kN drilling pressure and 60rpm rotation speed, and collect 60s of logging data as follows: Figure 6 As shown, the average value is taken as the ground torque value under this rotational speed and drilling pressure, which is 12.89 kN·m. At this time, the ground torque T... s2 The drill bit torque T b Drilling fluid resistance torque T m2 and the frictional resistance torque T between the drill string and the wellbore f2 Composition, namely T s2 =T b +T m2 +T f2 ;

[0075] 5) Based on the actual drill string structure and wellbore trajectory characteristics, analyze the stress characteristics of the drill string throughout the well under conditions of no drilling pressure and a rotation speed of 60 rpm. The frictional resistance torque distribution along the wellbore when there is no drilling pressure is shown in the diagram below. Figure 7 As shown, by combining them, the frictional resistance torque T between the drill string and the wellbore can be obtained. f1 Its value is 0.43 kN·m;

[0076] 6) Based on the actual drill string structure and wellbore trajectory characteristics, analyze the stress characteristics of the drill string throughout the well under conditions of 120kN drill pressure and 60rpm rotation speed, and obtain the frictional resistance torque distribution along the wellbore when there is drill pressure, as shown in the figure below. Figure 8 As shown, by combining them, the frictional resistance torque T between the drill string and the wellbore can be obtained. f2 Its value is 0.60 kN·m;

[0077] 7) According to the drill bit torque calculation formula T b =(T s2 -T s1 )-(T f2 -T f1 The drill bit torque of the drill string structure under a drilling pressure of 120 kN and a rotational speed of 60 rpm was calculated to be 3.32 kN·m.

[0078] 8) The results obtained using formula (1) are 3.33 to 6.67 kN.m, with a difference of 0.3% to 100.9%, indicating that the calculation results of the existing formula are greatly affected by the empirical coefficient K.

[0079] This application also discloses a system for determining drill bit torque, comprising:

[0080] The acquisition unit is used to acquire drill string structure parameters, wellbore trajectory parameters, surface torque T under no-drill pressure and specific rotational speed conditions. s1 And the surface torque T under specific drilling pressure and rotation speed conditions s2 ;

[0081] The resistance torque calculation unit is used to determine the frictional resistance torque T between the drill string and the wellbore under conditions of no drilling pressure and specific rotational speed, based on drill string structural parameters and wellbore trajectory parameters. f1 The frictional resistance torque T between the drill string and the wellbore under specific drilling pressure and rotation speed conditions. f2 ;

[0082] The torque calculation unit is used to calculate the surface torque T under conditions of no drilling pressure and a specific rotational speed. s1 and the frictional resistance torque T between the drill string and the wellbore f1 And the surface torque T under specific drilling pressure and rotation speed conditions. s2 and the frictional resistance torque T between the drill string and the wellbore f2 Determine the drill bit torque T of this drill string structure under specific drilling pressure and rotational speed conditions. b .

[0083] An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the steps of the method for determining the drill bit torque described above.

[0084] A computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the method for determining drill bit torque described above.

[0085] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention 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.

[0086] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. 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 illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0087] 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.

[0088] 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.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for determining drill bit torque, characterized in that, Includes the following steps: Obtain drill string structure parameters, wellbore trajectory parameters, surface torque T under no-drill pressure and specific rotation speed conditions. s1 And the surface torque T under specific drilling pressure and rotation speed conditions s2 ; The frictional resistance torque T between the drill string and the wellbore is determined based on the drill string structure parameters and wellbore trajectory parameters under no-pressure-to-drill (NPSD) and specific rotation speed conditions. f1 The frictional resistance torque T between the drill string and the wellbore under specific drilling pressure and rotation speed conditions. f2 ; Based on the ground torque T under no drilling pressure and specific rotational speed conditions s1 and the frictional resistance torque T between the drill string and the wellbore f1 And the surface torque T under specific drilling pressure and rotation speed conditions. s2 and the frictional resistance torque T between the drill string and the wellbore f2 Determine the drill bit torque T of the drill string structure under specific drilling pressure and rotational speed conditions. b .

2. The method for determining drill bit torque according to claim 1, characterized in that, The ground torque T under no drilling pressure and specific rotational speed conditions s1 Drilling fluid resistance torque T m1 The frictional resistance torque T between the drill string and the wellbore f1 Composition; the ground torque T under specific drilling pressure and rotation speed conditions. s2 The drill bit torque T b Drilling fluid resistance torque T m2 The frictional resistance torque T between the drill string and the wellbore f2 composition.

3. The method for determining drill bit torque according to claim 2, characterized in that, Under the same drilling fluid parameters, drill string structure, and drill string rotation speed, the drilling fluid resistance torque is equal, i.e., T. m1 =T m2 .

4. The method for determining drill bit torque according to claim 1, characterized in that, The drill bit torque T of the drill string structure under specific drilling pressure and rotational speed conditions is determined. b Specifically: T b =(T s2 -T s1 )-(T f2 -T f1 ) Among them, T b T represents the drill bit torque. s1 The surface torque under conditions of no drilling pressure and a specific rotational speed; T s2 To apply surface torque under specific drilling pressure and rotation speed conditions; T f1 The frictional resistance torque between the drill string and the wellbore under conditions of no drilling pressure and a specific rotational speed; T f2 This refers to the frictional resistance torque between the drill string and the wellbore under specific drilling pressure and rotation speed conditions.

5. The method for determining drill bit torque according to claim 1, characterized in that, The drill string structural parameters include the outer diameter, inner diameter, and length of each part of the drill string.

6. The method for determining drill bit torque according to claim 1, characterized in that, The wellbore trajectory parameters include depth, inclination angle, and azimuth angle.

7. The method for determining drill bit torque according to claim 1, characterized in that, The method for obtaining the ground torque T under no-drilling-pressure and specific rotational speed conditions. s1， Specifically, 60 seconds of logging data are taken and the average value is used as the surface torque value under that rotational speed and drilling pressure. The ground torque T obtained under conditions of increased drilling pressure and specific rotational speed is described. s2， Specifically, 60 seconds of logging data are taken and the average value is used as the surface torque value under that rotational speed and drilling pressure.

8. A system for determining drill bit torque, characterized in that, include: The acquisition unit is used to acquire drill string structural parameters, wellbore trajectory parameters, surface torque T under no-drill pressure and specific rotational speed conditions. s1 And the surface torque T under specific drilling pressure and rotation speed conditions s2 ; The resistance torque calculation unit is used to determine the frictional resistance torque T between the drill string and the wellbore under conditions of no drilling pressure and specific rotational speed, based on drill string structural parameters and wellbore trajectory parameters. f1 The frictional resistance torque T between the drill string and the wellbore under specific drilling pressure and rotation speed conditions. f2 ; The torque calculation unit is used to calculate the surface torque T under conditions of no drilling pressure and a specific rotational speed. s1 and the frictional resistance torque T between the drill string and the wellbore f1 And the surface torque T under specific drilling pressure and rotation speed conditions. s2 and the frictional resistance torque T between the drill string and the wellbore f2 Determine the drill bit torque T of the drill string structure under specific drilling pressure and rotational speed conditions. b .

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the steps of the method for determining the drill bit torque according to any one of claims 1-7.

10. A computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the method for determining the drill bit torque according to any one of claims 1-7.

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