Wellbore trajectory design parameter determination method, system, electronic device and storage medium

Abstract

The present application provides a method, system, electronic device and storage medium for determining borehole trajectory design parameters, and belongs to the field of computer technology. The method includes: constructing a borehole trajectory design model based on the design type of each track segment contained in the determined borehole trajectory and the type of formation in which each track segment is located, combined with engineering design factors and wellbore stability factors; taking the formation morphology and formation pressure in the drilling area as two key factors affecting the safety of the borehole trajectory, determining the constraints corresponding to the borehole trajectory design model; determining the objective function based on the borehole trajectory design model; optimizing all key design parameters contained in the borehole trajectory design model based on the objective function and constraints, and obtaining the optimal values ​​of all key design parameters. The present application can design relevant parameters that meet the geological structure requirements and wellbore stability requirements, thereby improving the safety of the borehole trajectory during excavation.

Description

Technical Field

[0001] The present application relates to the field of computer technology, and in particular to a method, system, electronic device and storage medium for determining wellbore trajectory design parameters. Background Art

[0002] In the prior art, the wellbore trajectory is usually designed directly based on the pre-set wellhead position and target position and through simple geometric transformation relationships. The impact of formation pressure and formation morphology on the wellbore trajectory during the actual drilling process is not taken into consideration, and a reasonable design strategy is not proposed, resulting in a high safety risk in the wellbore trajectory during the excavation process. Summary of the invention

[0003] The main purpose of this application is to propose a method, system, electronic equipment and storage medium for determining wellbore trajectory design parameters, which can design relevant parameters that meet geological structure requirements and wellbore stability requirements, thereby improving the safety of the wellbore trajectory during excavation.

[0004] To achieve the above objectives, one aspect of the present application provides a method for determining wellbore trajectory design parameters, the method comprising:

[0005] According to the design type of each track segment included in the determined wellbore track and the type of stratum in which each track segment is located, combined with engineering design factors and wellbore stability factors, a wellbore track design model is constructed;

[0006] Taking the formation morphology and formation pressure in the drilling area as two key factors affecting the safety of the wellbore trajectory, determining the constraint conditions corresponding to the wellbore trajectory design model;

[0007] determining an objective function according to the wellbore trajectory design model;

[0008] According to the objective function and the constraint conditions, all key design parameters included in the wellbore trajectory design model are optimized to obtain the optimal values ​​of all the key design parameters.

[0009] Further, the constructing of the wellbore trajectory design model according to the design type of each trajectory segment included in the determined wellbore trajectory and the formation type in which each trajectory segment is located, combined with engineering design factors and wellbore stability factors, includes:

[0010] Constructing a track length calculation model according to the design type of each track segment included in the wellbore track;

[0011] According to the design type of each track segment included in the wellbore track, considering that the torque generated by the drilling tool when drilling in different track segments is different, a track torque calculation model is constructed;

[0012] According to the formation type where each track segment included in the wellbore track is located, a track wellbore stability calculation model is constructed in combination with Mohr-Coulomb strength theory and linear elastic rock mechanics theory.

[0013] Furthermore, constructing a track length calculation model according to the design type of each track segment included in the wellbore track includes:

[0014] The wellbore track includes five track segments connected in sequence, and the five track segments are recorded as a vertical segment, an increasing inclination segment, a steady inclination segment, a decreasing inclination segment and a target segment in the order of excavation time from earliest to latest;

[0015] According to the vertical depth of the deflection point, a length calculation model of the vertical section is constructed;

[0016] According to the curvature radius of the inclination increasing section and the well inclination angle of the inclination stabilizing section, a length calculation model of the inclination increasing section is constructed;

[0017] A length calculation model of the stabilizing section is constructed according to the vertical depth of the inclination point, the curvature radius of the inclination increasing section, the curvature radius of the inclination decreasing section, the well inclination angle of the target section, and the vertical depth and horizontal displacement of the starting point of the target section;

[0018] Constructing a length calculation model of the descending section according to the curvature radius of the descending section, the well inclination angle of the steady-inclination section, and the well inclination angle of the target section;

[0019] A length calculation model of the target section is constructed according to the well inclination angle of the target section, the horizontal displacement of the starting point of the target section and the horizontal displacement of the excavation end point of the target section.

[0020] Furthermore, according to the design type of each track segment included in the wellbore track, taking into account the different torques generated by the drilling tool when drilling in different track segments, constructing the track torque calculation model includes:

[0021] The vertical segment, the steady slope segment and the target segment are recorded as three straight line segments, and the increasing slope segment and the descending slope segment are recorded as two curved segments;

[0022] For each straight line segment, a torque calculation model corresponding to the straight line segment is constructed according to the friction coefficient, the diameter of the drill pipe, the unit length weight of the drill pipe, the torque corresponding to the bottom of the straight line segment, and the length and well inclination of the straight line segment;

[0023] The torque corresponding to the bottom of the straight line segment is the torque corresponding to a single curved segment adjacent to the straight line segment and excavated later, and the torque corresponding to the bottom of the target segment is a preset value;

[0024] For each of the curve segments, a torque calculation model corresponding to the curve segment is constructed according to the friction coefficient, the diameter of the drill pipe, the well inclination angle at the top of the curve segment, the well inclination angle at the bottom of the curve segment, and the torque and axial load corresponding to the bottom of the curve segment;

[0025] Among them, the well inclination angle at the top of the curved segment is the well inclination angle of a single straight line segment adjacent to the curved segment and excavated earlier, and the single straight line segment adjacent to the curved segment and excavated later is recorded as the first straight line segment. The well inclination angle at the bottom of the curved segment is the well inclination angle of the first straight line segment, and the torque and axial load corresponding to the bottom of the curved segment are the torque and axial load corresponding to the first straight line segment respectively.

[0026] Furthermore, the construction of a trajectory wellbore stability calculation model based on the formation type in which each trajectory segment included in the wellbore trajectory is located, combined with Mohr-Coulomb strength theory and linear elastic rock mechanics theory, includes:

[0027] For each trajectory position contained in the wellbore trajectory,

[0028] In combination with the Mohr-Coulomb strength theory, a critical collapse pressure calculation model corresponding to the trajectory position is constructed according to the cohesion of the rock matrix, the pore pressure corresponding to the trajectory position, the friction angle on the shear failure surface formed in the stratum where the trajectory position is located, and the maximum principal stress and the minimum principal stress acting on the shear failure surface;

[0029] In combination with the linear elastic rock mechanics theory, a fracture pressure calculation model corresponding to the trajectory position is constructed according to the tensile strength of the rock, the pore pressure, the maximum principal stress and the minimum principal stress;

[0030] According to the density of the drilling fluid applied in the formation where the trajectory position is located and the well depth at the trajectory position, a wellbore pressure calculation model corresponding to the trajectory position is constructed.

[0031] Furthermore, the formation morphology and formation pressure in the drilling area are taken as two key factors affecting the safety of the wellbore trajectory, and the constraint conditions corresponding to the wellbore trajectory design model are determined to include:

[0032] Taking the stratum morphology in the drilling area as a key factor affecting the safety of the wellbore trajectory, determining a first constraint condition corresponding to the trajectory length calculation model;

[0033] The first constraint condition includes limiting that each track segment included in the wellbore track must not pass through the reservoir in the drilling area and the last excavated track segment is located in the reservoir;

[0034] Taking the formation pressure in the drilling area as another key factor affecting the safety of the wellbore trajectory, determining a second constraint condition corresponding to the trajectory wellbore stability calculation model;

[0035] The second constraint condition includes defining the relationship between the critical collapse pressure, the fracture pressure, the wellbore pressure and the pore pressure corresponding to each trajectory position included in the wellbore trajectory.

[0036] Further, determining the objective function according to the wellbore trajectory design model includes:

[0037] Determining a first objective function according to the track length calculation model;

[0038] Determining a second objective function according to the track torque calculation model;

[0039] According to the track wellbore stability calculation model, a third objective function is determined.

[0040] To achieve the above objectives, another aspect of the present application provides a wellbore trajectory design parameter determination system, the system comprising:

[0041] The first module is used to construct a wellbore trajectory design model according to the design type of each trajectory segment included in the determined wellbore trajectory and the type of stratum in which each trajectory segment is located, combined with engineering design factors and wellbore stability factors;

[0042] The second module is used to determine the constraint conditions corresponding to the wellbore trajectory design model by taking the formation morphology and formation pressure in the drilling area as two key factors affecting the safety of the wellbore trajectory;

[0043] The third module is used to determine the objective function according to the wellbore trajectory design model;

[0044] The fourth module is used to optimize all key design parameters included in the wellbore trajectory design model according to the objective function and the constraint conditions to obtain the optimal values ​​of all key design parameters.

[0045] To achieve the above objective, another aspect of the present application provides an electronic device, the electronic device comprising a memory and a processor, the memory storing a computer program, and the processor implementing the above method when executing the computer program.

[0046] To achieve the above objective, another aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program implements the above method when executed by a processor.

[0047] The present application includes at least the following beneficial effects: when determining the type of wellbore trajectory design, combining wellbore stability factors and engineering design factors, while fully considering the impact of the pressure characteristics and morphology of the formation on the wellbore trajectory during the drilling process, a more reasonable multi-objective function and its corresponding constraints are constructed to form a multi-objective optimization problem. By solving the multi-objective optimization problem, relevant design parameters that meet the geological structure requirements and wellbore stability requirements can be obtained, so that the final designed wellbore trajectory has better environmental adaptability and practicality, and is conducive to improving the safety of the wellbore trajectory during the excavation process, and can also effectively reduce the drilling difficulty and drilling costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a flow chart of a method for determining wellbore trajectory design parameters provided in an embodiment of the present application;

[0049] Figure 2 is a schematic diagram of a wellbore cross section regarding a wellbore trajectory provided in an embodiment of the present application;

[0050] Figure 3 is a schematic diagram of the Mohr-Coulomb failure model provided in the embodiments of the present application;

[0051] Figure 4 It is a structural schematic diagram of a wellbore trajectory design parameter determination system provided in an embodiment of the present application;

[0052] Figure 5 It is a schematic diagram of the hardware structure of the electronic device provided in the embodiment of the present application. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. They are only examples of systems and methods consistent with some aspects of the embodiments of the present application as detailed in the attached claims.

[0054] It is understood that the terms "first", "second", etc. used in this application can be used to describe various concepts in this article, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another concept. For example, without departing from the scope of the embodiment of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determination".

[0055] The terms "at least one", "multiple", "each", "any", etc. used in this application, at least one includes one, two or more, multiple includes two or more, each refers to each of the corresponding multiple, and any refers to any one of the multiple.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0057] In the prior art, the wellbore trajectory is usually determined directly based on a set of pre-set drilling parameters (i.e., the wellhead position and the target position) and through a simple geometric transformation relationship. The influence of formation pressure and formation morphology on the wellbore trajectory during the actual drilling process is not taken into consideration. For example, blowout accidents may occur in high-pressure formations, well wall collapse and drill bit sticking may occur in loose formations, etc., which makes the wellbore trajectory have a higher safety risk during the excavation process and increases the drilling cost and difficulty.

[0058] In view of this, the embodiments of the present application provide a method, system, electronic device and storage medium for determining the design parameters of a wellbore trajectory. When determining the wellbore trajectory design type, the scheme combines the wellbore stability factors and engineering design factors, and fully considers the influence of the pressure characteristics and morphology of the formation on the wellbore trajectory during the drilling process, and constructs a more reasonable multi-objective function and its corresponding constraints to form a multi-objective optimization problem. By solving the multi-objective optimization problem, relevant design parameters that meet the geological structure requirements and the wellbore stability requirements can be obtained, so that the finally designed wellbore trajectory has better environmental adaptability and practicality, and is conducive to improving the safety of the wellbore trajectory during the excavation process, and can also effectively reduce the drilling difficulty and drilling cost.

[0059] A method for determining borehole trajectory design parameters provided in an embodiment of the present application relates to the field of computer technology and can be applied to a terminal or a server, or can be software running in a terminal or a server. In some embodiments, the terminal can be a smart phone, a tablet computer, a laptop computer, a desktop computer, a smart speaker, a smart watch, and a vehicle-mounted terminal, etc., but is not limited thereto; the server side can be configured as an independent physical server, or as a server cluster or distributed system consisting of multiple physical servers, or as a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms, and the server can also be a node server in a blockchain network; the software can be an application that implements a method for determining borehole trajectory design parameters, etc., but is not limited to the above forms.

[0060] The present application can be used in many general or special computer system environments or configurations. For example: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, etc. The present application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application can also be practiced in distributed computing environments, in which tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media including storage devices.

[0061] Figure 1 is an optional flow chart of a method for determining wellbore trajectory design parameters provided in an embodiment of the present application. Figure 1 The method may include but is not limited to steps S101 to S104.

[0062] Step S101: constructing a wellbore trajectory design model according to the design type of each track segment included in the determined wellbore trajectory and the type of stratum in which each track segment is located, combined with engineering design factors and wellbore stability factors; wherein the engineering design factors include the length of the wellbore trajectory and the torque corresponding to the wellbore trajectory, and the wellbore stability factors include the critical collapse pressure, fracture pressure and wellbore pressure corresponding to the wellbore trajectory;

[0063] Step S102: Taking the formation morphology and formation pressure in the drilling area as two key factors affecting the safety of the wellbore trajectory, determining the constraint conditions corresponding to the wellbore trajectory design model;

[0064] Step S103, determining the objective function according to the wellbore trajectory design model;

[0065] Step S104: Optimize all key design parameters included in the wellbore trajectory design model according to the objective function and the constraint conditions to obtain the optimal values ​​of all key design parameters.

[0066] In some embodiments, step S101 may include, but is not limited to, steps S201 to S203.

[0067] Step S201: constructing a track length calculation model based on the design type of each track segment included in the wellbore track;

[0068] Step S202: Based on the design types of each track segment included in the wellbore track, and taking into account the different torques generated by the drilling tool when drilling in different track segments, a track torque calculation model is constructed;

[0069] Step S203: Based on the formation type of each track segment contained in the wellbore track, combined with the linear elastic rock mechanics theory and the Mohr-Coulomb strength theory (ie, the Mohr-Coulomb criterion), a track wellbore stability calculation model is constructed.

[0070] It should be noted that the wellbore trajectory design model includes the trajectory length calculation model, the trajectory torque calculation model and the trajectory wellbore stability calculation model. The trajectory length calculation model includes the length calculation model of each trajectory segment, the trajectory torque calculation model includes the torque calculation model corresponding to each trajectory segment, and the trajectory wellbore stability calculation model includes the critical collapse pressure calculation model, the fracture pressure calculation model and the wellbore pressure calculation model corresponding to each trajectory position contained in the wellbore trajectory.

[0071] By modeling and analyzing the length of the wellbore trajectory, the torque corresponding to the wellbore trajectory, and the critical collapse pressure, fracture pressure and wellbore pressure corresponding to different trajectory positions contained in the wellbore trajectory when the wellbore trajectory design type is determined, it is beneficial to achieve comprehensive design optimization of the wellbore trajectory.

[0072] In some embodiments, considering that the directional well should choose a wellbore trajectory with a simple shape and easy construction, the present application preferably adopts a two-dimensional double-incremental trajectory model to complete the design of the wellbore trajectory, such as Figure 2As shown, the wellbore track contains five track segments connected in sequence. These five track segments are recorded as vertical segment OK, increasing inclination segment Kb, steady inclination segment bc, decreasing inclination segment ct and target segment td in order of excavation time, and the increasing inclination segment Kb and the decreasing inclination segment ct are defined as two curved segments, and the vertical segment OK, the steady inclination segment bc and the target segment td are defined as three straight segments.

[0073] It should be noted that, in the vertical section OK, the drill bit starts from the preset wellhead position and penetrates the surface layer vertically downward from the ground to enter the stable formation; in the increasing inclination section Kb, the drill bit begins to gradually increase the wellbore inclination to incline toward the preset target position; in the stable inclination section bc, the drill bit continues drilling while maintaining a certain inclination angle to ensure the stability of the wellbore trajectory; in the decreasing inclination section ct, the drill bit begins to gradually reduce the wellbore inclination to ensure that the wellbore trajectory can accurately reach the target position; in the target section td, the drill bit accurately reaches the target position.

[0074] In some embodiments, step S201 may include, but is not limited to, steps S301 to S305.

[0075] Step S301: Based on the vertical depth of the deflection point, a length calculation model of the vertical section OK is constructed as follows:

[0076] L1=D kop ;

[0077] Step S302: Based on the curvature radius of the increasing inclination section Kb and the well inclination angle of the stable inclination section bc, a length calculation model of the increasing inclination section Kb is constructed as follows:

[0078]

[0079] Step S303: Based on the vertical depth of the inclination point, the curvature radius of the inclination increasing section Kb, the curvature radius of the inclination decreasing section ct, the well inclination angle of the target section td, and the horizontal displacement and vertical depth of the excavation starting point of the target section td, a length calculation model of the inclination stabilizing section bc is constructed as follows:

[0080]

[0081] D e =D t -D kop -R zz *sin(α t ),

[0082] S e =S t -R z +R zz *cos(α t ),

[0083] R e =R z -R zz ;

[0084] Step S304: Based on the well inclination angle of the stable inclination section bc, the curvature radius of the falling inclination section ct and the well inclination angle of the target section td, a length calculation model of the falling inclination section ct is constructed as follows:

[0085]

[0086] Step S305: Based on the well inclination angle of the target segment td, the horizontal displacement of the excavation start point of the target segment td, and the horizontal displacement of the excavation end point of the target segment td, a length calculation model of the target segment td is constructed as follows:

[0087]

[0088] in:

[0089]

[0090] Where L1 is the length of the vertical segment OK, D kop is the vertical depth of the deflection point, L2 is the length of the deflection section Kb, R z is the radius of curvature of the slope increasing section Kb, α b is the well inclination angle of the stable inclination section bc, π is the circumference of the circle, L3 is the length of the stable inclination section bc, D e , R e and R e Three reference parameters are formulated for the convenience of description. t is the vertical depth of the excavation starting point of the target section td, R zz is the curvature radius of the descending slope ct, α t is the well inclination angle of the target section td, S t is the horizontal displacement of the excavation starting point of the target segment td, L4 is the length of the descending segment ct, L5 is the length of the target segment td, S d is the horizontal displacement of the excavation end point of the target segment td, K c1 is the slope rate of the slope increasing section Kb, K c2 is the slope rate of the descending section ct.

[0091] According to the arrangement positions of the various track segments contained in the wellbore trajectory, when setting the length calculation model of each track segment, some geometric parameters of other associated track segments are taken into consideration for constraints, so that a more reasonable track length calculation model can be constructed, which is conducive to improving the optimization design effect of the wellbore trajectory.

[0092] In some embodiments, step S202 may include, but is not limited to, steps S401 to S402.

[0093] Step S401: for each straight line segment, considering that the torque corresponding to the straight line segment is mainly generated by the contact force between the drill pipe and the wellbore, and the normal stress of the corresponding contact surface is the radial component of gravity, based on the friction coefficient, the unit length weight of the drill pipe, the drill pipe diameter, the torque corresponding to the bottom of the straight line segment, and the well inclination angle and length of the straight line segment, a torque calculation model corresponding to the straight line segment is constructed as follows:

[0094]

[0095] Step S402: for each curve segment, considering that the torque corresponding to the curve segment is mainly converted from the normal force and friction force generated on the contact surface between the drill tool and the well wall, and the normal force and the friction force are affected by the geometric shape of the wellbore trajectory (such as the curvature radius and the bending angle, etc.), based on the friction coefficient, the drill pipe diameter, the well inclination angle at the top of the curve segment, the well inclination angle at the bottom of the curve segment, and the axial load and torque corresponding to the bottom of the curve segment, a torque calculation model corresponding to the curve segment is constructed as follows:

[0096]

[0097] Where, T l is the torque corresponding to the straight line segment, T l_b is the torque corresponding to the bottom of the straight line segment, μ is the friction coefficient, D is the drill pipe diameter, ω is the unit length weight of the drill pipe, and L l is the length of the straight line segment, α l is the well inclination angle of the straight line segment, T c is the torque corresponding to the curve segment, T c_b is the torque corresponding to the bottom of the curve segment, F c_b is the axial load corresponding to the bottom of the curve segment, α c_t is the well inclination angle at the top of the curve segment, α c_b is the well inclination angle at the bottom of the curve segment, and the well inclination angle is defined as the angle between the wellbore direction line and the gravity line.

[0098] It should be understood that the torque T corresponding to the bottom of the straight line segment is l_b It is actually the torque corresponding to a single curved segment adjacent to the straight segment and excavated later. The well inclination angle α at the top of the curved segment is c_t It is actually the well inclination angle of a single straight line segment adjacent to the curve segment and excavated earlier. The single straight line segment adjacent to the curve segment and excavated later is defined as the first straight line segment. The well inclination angle α at the bottom of the curve segment is c_b It is actually the well inclination angle of the first straight line segment, and the torque T corresponding to the bottom of the curve segmentc_b It is actually the torque corresponding to the first straight line segment, and the axial load F corresponding to the bottom of the curve segment c_b It is actually the axial load corresponding to the first straight line segment.

[0099] Exemplarily, the torque corresponding to the bottom of the vertical segment OK is actually the torque corresponding to the increasing inclination segment Kb, the torque corresponding to the bottom of the steady inclination segment bc is actually the torque corresponding to the decreasing inclination segment ct, and the torque corresponding to the bottom of the target segment td is a preset value given in advance by the staff in consideration of the working conditions of the drill bit equipment; the well inclination angle at the top of the increasing inclination segment Kb is actually the well inclination angle of the vertical segment OK, and the well inclination angle of the vertical segment OK is 0 degrees, and the well inclination angle at the top of the decreasing inclination segment ct is actually the well inclination angle of the steady inclination segment bc; The well inclination angle at the bottom of the increasing inclination section Kb is actually the well inclination angle of the stable inclination section bc, and the well inclination angle at the bottom of the decreasing inclination section ct is actually the well inclination angle of the target section td; the torque corresponding to the bottom of the increasing inclination section Kb is actually the torque corresponding to the stable inclination section bc, and the torque corresponding to the bottom of the decreasing inclination section ct is actually the torque corresponding to the target section td; the axial load corresponding to the bottom of the increasing inclination section Kb is actually the axial load corresponding to the stable inclination section bc, and the axial load corresponding to the bottom of the decreasing inclination section ct is actually the axial load corresponding to the target section td.

[0100] The axial load corresponding to each track segment is described as follows:

[0101] For each straight line segment, the axial load corresponding to the straight line segment is calculated using the following formula:

[0102] F l =F l_b +B*ω*L l *cos(α l );

[0103] For each curve segment, the axial load corresponding to the curve segment is calculated using the following formula:

[0104]

[0105] In the formula, F l is the axial load corresponding to the straight line segment, F l_b is the axial load corresponding to the bottom of the straight line segment, B is the buoyancy factor, and F c is the axial load corresponding to the curve segment, L c is the length of the curve segment.

[0106] It should be understood that the axial load F corresponding to the bottom of the straight line segment is l_bIt is actually the axial load corresponding to a single curved segment adjacent to the straight segment and excavated later; for example, the axial load corresponding to the bottom of the vertical segment OK is actually the axial load corresponding to the increasing inclination segment Kb, the axial load corresponding to the bottom of the steady inclination segment bc is actually the axial load corresponding to the decreasing inclination segment ct, and the axial load corresponding to the bottom of the target segment td is also a preset value given in advance by the staff considering the working conditions of the drill equipment.

[0107] According to the arrangement positions of the various track segments contained in the wellbore trajectory, when setting the torque calculation model corresponding to each track segment, the cause of the torque is taken into account and the relevant mechanical parameters and relevant geometric parameters are used for constraints. A more reasonable torque length calculation model can be constructed, which is conducive to improving the optimization design effect of the wellbore trajectory.

[0108] In some embodiments, step S203 may include, but is not limited to, steps S501 to S503.

[0109] Step S501: for each trajectory position included in the wellbore trajectory, in combination with the Mohr-Coulomb strength theory (i.e., the Mohr-Coulomb criterion), based on the cohesion of the rock matrix, the pore pressure corresponding to the trajectory position, the friction angle on the shear failure surface formed by the formation at the trajectory position, and the minimum principal stress and maximum principal stress acting on the shear failure surface, a critical collapse pressure calculation model corresponding to the trajectory position is constructed;

[0110] Specifically, considering that wellbore collapse is usually caused by shear failure in the formation, the present application adopts Figure 3 The Mohr-Coulomb failure model shown in the figure is used to deduce stress. For each trajectory position included in the wellbore trajectory, the coordinates of the failure point on the shear failure surface formed in the formation at the trajectory position can be calculated using the following formula:

[0111]

[0112] in:

[0113]

[0114] The above two sets of formulas are integrated and transformed to construct the critical collapse pressure calculation model corresponding to the trajectory position:

[0115]

[0116] M=3*σ max -σ min ;

[0117] Where (τ,σ′) is the coordinate of the failure point on the shear failure surface formed in the stratum where the trajectory is located, τ is the shear stress on the shear failure surface, σ′ is the effective normal stress (also called normal stress) on the shear failure surface, τ0 is the cohesion of the rock matrix, is the friction angle on the shear failure surface, σ′1 is the maximum effective normal stress on the shear failure surface, σ′3 is the minimum effective normal stress on the shear failure surface, and the expressions for the maximum effective normal stress σ′1 and the minimum effective normal stress σ′3 are formulated taking into account that all shear stress components on the symmetry plane will cancel each other out. max is the maximum principal stress acting on the shear failure surface, σ min is the minimum principal stress acting on the shear failure surface, P wc is the critical collapse pressure corresponding to the position of the trajectory, P p is the pore pressure corresponding to the position of the trajectory, and M is a reference parameter formulated for the convenience of description.

[0118] Step S502: For each trajectory position included in the wellbore trajectory, in combination with the linear elastic rock mechanics theory, based on the tensile strength of the rock, the pore pressure corresponding to the trajectory position, and the minimum principal stress and maximum principal stress acting on the shear failure surface formed by the formation at the trajectory position, a fracture pressure calculation model corresponding to the trajectory position is constructed as follows:

[0119] P wf =3*σ min -σ max -P p -σ t ;

[0120] Where P wf is the corresponding rupture pressure at the trajectory position, σ t is the tensile strength of rock.

[0121] Step S503: For each trajectory position included in the wellbore trajectory, based on the well depth at the trajectory position and the density of the drilling fluid applied in the formation where the trajectory position is located, a calculation model for the wellbore pressure corresponding to the trajectory position is constructed as follows:

[0122] P w =p f *g*h;

[0123] Where P w is the wellbore pressure corresponding to the position of the trajectory, p f is the density of drilling fluid applied in the formation at the trajectory position, g is the gravitational acceleration, and h is the well depth at the trajectory position.

[0124] It should be noted that the five track segments included in the wellbore track are correspondingly arranged in five different formations, and the density of the drilling fluid applied in the formation where each track segment is located is different.

[0125] According to the formation type of each track segment contained in the wellbore trajectory, the linear elastic rock mechanics theory and Mohr-Coulomb strength theory are introduced to conduct a more comprehensive analysis when setting the various pressure calculation models corresponding to each trajectory position. This can construct a more reasonable trajectory wellbore stability calculation model, which is conducive to improving the optimization design effect of the wellbore trajectory.

[0126] In some embodiments, step S102 may include, but is not limited to, steps S601 to S602.

[0127] Step S601: The formation morphology in the drilling area is taken as a key factor affecting the safety of the wellbore trajectory. The drilling area contains reservoirs. This is mainly because the wellbore trajectory is likely to deviate from the established target area when the reservoir thickness is thin, the geological conditions are complex, and the wellbore trajectory is tortuous. Based on the trajectory length calculation model, the first constraint condition is determined to include the following:

[0128]

[0129] Where D x is the vertical depth at each trajectory position contained in the target segment td, D rl is the lower limit of vertical depth at different positions in the reservoir, D ru is the upper limit of the vertical depth at different positions in the reservoir. For the i-th track segment contained in the wellbore track, i = 1, 2, 3, 4, 5, D i is the vertical depth at each track position contained in the i-th track segment, L i is the length of the i-th track segment.

[0130] Among them, using 0 <D i <D ru This condition can limit the various track segments included in the wellbore track to not cross the reservoir, so as to ensure the practical feasibility of the track design; rl ≤D x ≤D ru This condition can limit the last excavated track segment (i.e., the target segment td) to always be located within the reservoir to improve mining efficiency. e >0, S e >0, R e >0 and L i >0These four basic conditions can limit the length of each track segment contained in the wellbore track to be a non-negative value, so as to ensure the rationality of the track design.

[0131] Step S602: Taking the formation pressure in the drilling area as another key factor affecting the safety of the wellbore trajectory, based on the trajectory wellbore stability calculation model, determine the second constraint condition, which includes defining the relationship between the critical collapse pressure, wellbore pressure, fracture pressure and pore pressure corresponding to each trajectory position included in the wellbore trajectory, as follows:

[0132]

[0133] Among them, for each trajectory position included in the wellbore trajectory, by limiting the wellbore pressure corresponding to the trajectory position to be greater than the critical collapse pressure corresponding to the trajectory position, the wellbore collapse phenomenon can be avoided; by limiting the wellbore pressure corresponding to the trajectory position to be less than the rupture pressure corresponding to the trajectory position, the wellbore tensile damage phenomenon can be avoided, thereby avoiding complex accidents such as formation rupture and well leakage; by limiting the wellbore pressure corresponding to the trajectory position to be greater than the pore pressure corresponding to the trajectory position, the formation fluid invasion phenomenon can be avoided, thereby avoiding wellbore instability, blowout or other serious accidents. In other words, introducing the second constraint condition in the trajectory design stage can ensure that the designed wellbore trajectory has wellbore stability and can ensure the safety and efficiency of drilling operations.

[0134] In some embodiments, step S103 may include, but is not limited to, steps S701 to S703.

[0135] Step S701: Based on the trajectory length calculation model, with the goal of minimizing the total length of the wellbore trajectory, the first objective function is determined as:

[0136]

[0137] Step S702: Based on the trajectory torque calculation model, with the goal of minimizing the total torque corresponding to the wellbore trajectory, determine the second objective function as follows:

[0138]

[0139] Step S703: Based on the trajectory wellbore stability calculation model, with the goal of minimizing the total critical collapse pressure corresponding to the wellbore trajectory, determine the third objective function as follows:

[0140]

[0141] Where f1(x) is the first objective function, N is the number of all trajectory segments contained in the wellbore trajectory, f2(x) is the second objective function, and T iis the torque corresponding to the i-th track segment, f3(x) is the third objective function, L refers to all trajectory positions contained in the wellbore track, and the present application adopts the numerical integration method to solve the total critical collapse pressure corresponding to the wellbore track.

[0142] By comprehensively considering engineering design factors and wellbore stability factors and constructing multiple corresponding objective functions, the final trajectory optimization design problem can be made more in line with actual application needs.

[0143] In step S104 of some embodiments, all key design parameters contained in the wellbore trajectory design model are used as multidimensional objective variables to be optimized by the algorithm, and then combined with the first constraint condition, the second constraint condition and the value range corresponding to each key design parameter, a multi-objective optimization algorithm is used to simultaneously solve the first objective function, the second objective function and the third objective function to obtain the optimal value of each key design parameter; wherein, the multi-objective optimization algorithm preferably adopts NSGA-II (Non-dominated Sorting Genetic Algorithm II, the second generation non-dominated sorting genetic algorithm), of course, MOPSO (Multi-Objective Particle Swarm Optimization) algorithm, NSWOA (Non-Dominated Walrus Optimization Algorithm, walrus optimization algorithm based on non-dominated sorting), etc. can also be used, and the present application does not limit this.

[0144] In some embodiments, specific descriptions are made for all key design parameters included in the wellbore trajectory design model and the value range corresponding to each key design parameter, as shown in Table 1.

[0145] Table 1 Key design parameters and their corresponding value ranges

[0146]

[0147]

[0148] Specifically, the final trajectory optimization design problem is determined according to all key design parameters included in the wellbore trajectory design model, the first constraint condition, the second constraint condition, the first objective function, the second objective function and the third objective function, and then NSGA-II is used to solve the trajectory optimization design problem. The corresponding implementation process includes the following stages:

[0149] (1) Initializing the population: Randomly generate an initial population, which contains N individuals, where N is an integer greater than 1, and the specific value of each key design parameter referred to by each individual falls within the value range corresponding to the key design parameter;

[0150] (2) Evaluate the fitness of individuals in the population: Calculate the three objective function values ​​corresponding to each individual in the current population to evaluate the performance of each individual in the entire objective function space;

[0151] (3) Non-dominated sorting: Divide each individual in the current population into levels so that individuals at each level are not dominated by individuals at other levels;

[0152] (4) Crowding calculation: Calculate the crowding degree corresponding to each individual in the current population to measure the density of each individual in its non-dominated layer;

[0153] (5) Selection operation: Use the roulette wheel selection method and combine the non-dominated sorting results and the crowding calculation results to select some individuals from the current population. When selecting, give priority to individuals with lower non-dominated sorting levels. If two individuals are at the same level, the individual with a larger crowding degree is selected.

[0154] (6) Genetic operation: Generate a new offspring population through crossover and mutation operations on selected individuals;

[0155] (7) Generate a new generation population: merge the current population and the new offspring population, recalculate the non-dominated sort and crowding degree of the merged population, and then select the top N individuals from the merged population based on the current non-dominated sort result and crowding degree calculation to form a new generation population;

[0156] (8) Termination condition check: Determine whether the current number of iterations reaches the set maximum number of iterations; if so, output the Pareto front solution set in the current population, which records the optimal values ​​of all key design parameters; if not, re-execute the relevant contents of stages (2) to (7).

[0157] A method for determining borehole trajectory design parameters provided in an embodiment of the present application, when determining the borehole trajectory design type, combines wellbore stability factors and engineering design factors, and fully considers the influence of the pressure characteristics and morphology of the formation on the borehole trajectory during the drilling process, constructs a more reasonable multi-objective function and its corresponding constraints to form a multi-objective optimization problem. By solving the multi-objective optimization problem, relevant design parameters that meet the geological structure requirements and wellbore stability requirements can be obtained, so that the finally designed wellbore trajectory has better environmental adaptability and practicality, and is conducive to improving the safety of the wellbore trajectory during the excavation process, and can also effectively reduce the drilling difficulty and drilling cost.

[0158] See also Figure 4 The embodiment of the present application further provides a wellbore trajectory design parameter determination system, which can implement the wellbore trajectory design parameter determination method described above, and the system includes:

[0159] The first module 801 is used to construct a wellbore trajectory design model based on the formation type of each trajectory segment contained in the predetermined wellbore trajectory and the design type of each trajectory segment, combined with the wellbore stability factor and the engineering design factor;

[0160] The second module 802 is used to determine the constraint conditions corresponding to the wellbore trajectory design model by taking the formation pressure and formation morphology in the drilling area as two key factors affecting the safety of the wellbore trajectory;

[0161] The third module 803 is used to determine the objective function based on the wellbore trajectory design model;

[0162] The fourth module 804 is used to optimize all key design parameters involved in the wellbore trajectory design model based on the constraint conditions and the objective function to obtain the optimal values ​​of all key design parameters.

[0163] It can be understood that the contents of the above method embodiments are all applicable to the present system embodiments, the functions specifically implemented by the present system embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0164] The embodiment of the present application also provides an electronic device, the electronic device includes a memory and a processor, the memory stores a computer program, and the processor implements the above-mentioned method for determining the wellbore trajectory design parameters when executing the computer program. The electronic device can be any intelligent terminal including a tablet computer, a vehicle-mounted computer, etc.

[0165] It can be understood that the contents of the above method embodiments are all applicable to the present device embodiments, the functions specifically implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0166] See also Figure 5 , Figure 5 The hardware structure of an electronic device of another embodiment is illustrated, and the electronic device includes:

[0167] The processor 901 may be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application;

[0168] The memory 902 may be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 902 may store an operating system and other application programs. When the technical solution provided in the embodiment of the present application is implemented by software or firmware, the relevant program code is stored in the memory 902, and the processor 901 calls and executes the technical solution provided in the embodiment of the present application;

[0169] Input / output interface 903, used to implement information input and output;

[0170] Communication interface 904, used to realize communication interaction between the device and other devices, which can be realized by wired mode (such as USB, network cable, etc.) or wireless mode (such as mobile network, WIFI, Bluetooth, etc.);

[0171] A bus 905 that transmits information between various components of the device (e.g., the processor 901, the memory 902, the input / output interface 903, and the communication interface 904);

[0172] The processor 901 , the memory 902 , the input / output interface 903 and the communication interface 904 are connected to each other in communication within the device via a bus 905 .

[0173] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the above-mentioned method for determining wellbore trajectory design parameters is implemented.

[0174] It can be understood that the contents of the above method embodiments are all applicable to the present storage medium embodiments, the functions specifically implemented by the present storage medium embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0175] The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory may optionally include a memory remotely disposed relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0176] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0177] Those skilled in the art will appreciate that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0178] The system embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0179] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0180] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0181] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0182] In the several embodiments provided in the present application, it should be understood that the disclosed systems and methods can be implemented in other ways. For example, the system embodiments described above are only schematic. For example, the division of the above units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of systems or units, which can be electrical, mechanical or other forms.

[0183] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0184] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0185] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes multiple instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store programs.

[0186] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of the rights of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present invention should be within the scope of the rights of the present invention.

Claims

1. A method for determining wellbore trajectory design parameters, characterized in that: The method comprises: According to the design type of each track segment included in the determined wellbore track and the type of stratum in which each track segment is located, combined with engineering design factors and wellbore stability factors, a wellbore track design model is constructed; Taking the formation morphology and formation pressure in the drilling area as two key factors affecting the safety of the wellbore trajectory, determining the constraint conditions corresponding to the wellbore trajectory design model; determining an objective function according to the wellbore trajectory design model; According to the objective function and the constraint conditions, optimizing all key design parameters included in the wellbore trajectory design model to obtain optimal values ​​of all key design parameters; The step of constructing a wellbore trajectory design model based on the design type of each trajectory segment included in the determined wellbore trajectory and the formation type in which each trajectory segment is located, combined with engineering design factors and wellbore stability factors, includes: Constructing a track length calculation model according to the design type of each track segment included in the wellbore track; According to the design type of each track segment included in the wellbore track, considering that the torque generated by the drilling tool when drilling in different track segments is different, a track torque calculation model is constructed; According to the formation type where each track segment included in the wellbore track is located, a track wellbore stability calculation model is constructed in combination with Mohr-Coulomb strength theory and linear elastic rock mechanics theory.

2. The method for determining wellbore trajectory design parameters according to claim 1, characterized in that: The constructing of the track length calculation model according to the design type of each track segment included in the wellbore track includes: The wellbore track includes five track segments connected in sequence, and the five track segments are recorded as a vertical segment, an increasing inclination segment, a steady inclination segment, a decreasing inclination segment and a target segment in the order of excavation time from the earliest to the latest; According to the vertical depth of the deflection point, a length calculation model of the vertical section is constructed; According to the curvature radius of the inclination increasing section and the well inclination angle of the inclination stabilizing section, a length calculation model of the inclination increasing section is constructed; A length calculation model of the stabilizing section is constructed according to the vertical depth of the inclination point, the curvature radius of the inclination increasing section, the curvature radius of the inclination decreasing section, the well inclination angle of the target section, and the vertical depth and horizontal displacement of the starting point of the target section; Constructing a length calculation model of the descending section according to the curvature radius of the descending section, the well inclination angle of the steady-inclination section, and the well inclination angle of the target section; A length calculation model of the target section is constructed according to the well inclination angle of the target section, the horizontal displacement of the starting point of the target section and the horizontal displacement of the excavation end point of the target section.

3. The method for determining wellbore trajectory design parameters according to claim 2, characterized in that: According to the design type of each track segment included in the wellbore track, considering that the torque generated by the drilling tool when drilling in different track segments is different, constructing the track torque calculation model includes: The vertical segment, the steady slope segment and the target segment are recorded as three straight line segments, and the increasing slope segment and the descending slope segment are recorded as two curved segments; For each straight line segment, a torque calculation model corresponding to the straight line segment is constructed according to the friction coefficient, the diameter of the drill pipe, the unit length weight of the drill pipe, the torque corresponding to the bottom of the straight line segment, and the length and the well inclination of the straight line segment; The torque corresponding to the bottom of the straight line segment is the torque corresponding to a single curved segment adjacent to the straight line segment and excavated later, and the torque corresponding to the bottom of the target segment is a preset value; For each of the curve segments, a torque calculation model corresponding to the curve segment is constructed according to the friction coefficient, the diameter of the drill pipe, the well inclination angle at the top of the curve segment, the well inclination angle at the bottom of the curve segment, and the torque and axial load corresponding to the bottom of the curve segment; Among them, the well inclination angle at the top of the curved segment is the well inclination angle of a single straight segment adjacent to the curved segment and excavated earlier, and the single straight segment adjacent to the curved segment and excavated later is recorded as the first straight segment. The well inclination angle at the bottom of the curved segment is the well inclination angle of the first straight segment, and the torque and axial load corresponding to the bottom of the curved segment are the torque and axial load corresponding to the first straight segment respectively.

4. The method for determining wellbore trajectory design parameters according to claim 1, characterized in that: The method of constructing a trajectory wellbore stability calculation model according to the formation type in which each trajectory segment included in the wellbore trajectory is located, combining Mohr-Coulomb strength theory and linear elastic rock mechanics theory, comprises: For each trajectory position contained in the wellbore trajectory, In combination with the Mohr-Coulomb strength theory, a critical collapse pressure calculation model corresponding to the trajectory position is constructed according to the cohesion of the rock matrix, the pore pressure corresponding to the trajectory position, the friction angle on the shear failure surface formed in the stratum where the trajectory position is located, and the maximum principal stress and the minimum principal stress acting on the shear failure surface; In combination with the linear elastic rock mechanics theory, a fracture pressure calculation model corresponding to the trajectory position is constructed according to the tensile strength of the rock, the pore pressure, the maximum principal stress and the minimum principal stress; According to the density of the drilling fluid applied in the formation where the trajectory position is located and the well depth at the trajectory position, a wellbore pressure calculation model corresponding to the trajectory position is constructed.

5. The method for determining wellbore trajectory design parameters according to claim 4, characterized in that: The formation morphology and formation pressure in the drilling area are taken as two key factors affecting the safety of the wellbore trajectory, and the constraint conditions corresponding to the wellbore trajectory design model are determined to include: Taking the stratum morphology in the drilling area as a key factor affecting the safety of the wellbore trajectory, determining a first constraint condition corresponding to the trajectory length calculation model; The first constraint condition includes limiting that each track segment included in the wellbore track must not pass through the reservoir in the drilling area and the last excavated track segment is located in the reservoir; Taking the formation pressure in the drilling area as another key factor affecting the safety of the wellbore trajectory, determining a second constraint condition corresponding to the trajectory wellbore stability calculation model; The second constraint condition includes defining the relationship between the critical collapse pressure, the fracture pressure, the wellbore pressure and the pore pressure corresponding to each trajectory position included in the wellbore trajectory.

6. The method for determining wellbore trajectory design parameters according to claim 1, characterized in that: Determining the objective function according to the wellbore trajectory design model includes: Determining a first objective function according to the track length calculation model; Determining a second objective function according to the track torque calculation model; According to the track wellbore stability calculation model, a third objective function is determined.

7. A wellbore trajectory design parameter determination system, characterized in that: The system comprises: The first module is used to construct a wellbore trajectory design model according to the design type of each trajectory segment included in the determined wellbore trajectory and the type of stratum in which each trajectory segment is located, combined with engineering design factors and wellbore stability factors; The second module is used to determine the constraint conditions corresponding to the wellbore trajectory design model by taking the formation morphology and formation pressure in the drilling area as two key factors affecting the safety of the wellbore trajectory; The third module is used to determine the objective function according to the wellbore trajectory design model; The fourth module is used to optimize all key design parameters included in the wellbore trajectory design model according to the objective function and the constraint conditions to obtain the optimal values ​​of all key design parameters; In the first module, the construction of the wellbore trajectory design model according to the design type of each trajectory segment included in the determined wellbore trajectory and the formation type in which each trajectory segment is located, combined with engineering design factors and wellbore stability factors, includes: Constructing a track length calculation model according to the design type of each track segment included in the wellbore track; According to the design type of each track segment included in the wellbore track, considering that the torque generated by the drilling tool when drilling in different track segments is different, a track torque calculation model is constructed; According to the formation type where each track segment included in the wellbore track is located, a track wellbore stability calculation model is constructed in combination with Mohr-Coulomb strength theory and linear elastic rock mechanics theory.

8. An electronic device, characterized in that: The electronic device comprises a memory and a processor, the memory stores a computer program, and the processor implements the method according to any one of claims 1 to 6 when executing the computer program.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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