Well track design method, device and equipment for rescue well and medium

Abstract

The invention relates to the technical field of oil field drilling and production, in particular to a borehole trajectory design method, device, equipment and medium of a rescue well, the method comprises the following steps: according to actually measured well trajectory data of a target well, selecting a long straight well section or a long stable inclined section on the trajectory as a target communicated well section; the midpoint of the target connected well section is taken as a first engineering target point of first trial drilling connection, and space coordinate data of the first engineering target point are recorded and comprise geodetic coordinates and vertical depth; drawing a preliminary well track from a new drilling well mouth to the first engineering target spot, obtaining a first vertex coordinate corresponding to the top end point of the last stable inclination section of the preliminary well track and a second vertex coordinate corresponding to the top end point of the target communication well section, and designing a communication collision point and a collision section drilling track according to the target well track condition, the single-time trial drilling communication success rate is increased, the trial drilling frequency is reduced, and the target well risk hidden danger is eliminated after communication is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of oilfield drilling and production, and in particular to a wellbore trajectory design method, device, equipment and medium for a rescue well. Background Art

[0002] As the development of old oil fields enters the middle and late stages, there will inevitably be a large number of abandoned oil and gas wells. Some of these wells have been abandoned for a long time. For example, in the 1970s and 1980s, the wellbore treatment technology was not perfect and the well sealing standards were low, resulting in the failure to effectively isolate the oil, gas and water layers, and there is a risk of connecting to the effective production layer and oil and gas escaping from the ground. The conventional treatment method is to use a well repair machine to lower the drill bit from the original wellhead, drill the original cement plug, and then re-insert the cement plug according to the current well sealing standards to isolate the oil, gas and water layers. However, due to the long time, the abandoned wells may have casing damage or casing changes in the shallow well section, or the original wellhead has been leveled, and the ground has been covered with factories, houses and other uses. As a result, it is impossible to re-enter the drill bit from the original wellhead to the oil and gas layer section to inject cement plugs. This type of abandoned well has become a hidden danger well that is difficult to treat with conventional means. With the continuous development of directional drilling technology, the accuracy of directional drilling in hitting the target point has been continuously improved. Drilling a new well next to the potential well, connecting it with the potential well as a rescue well and injecting cement to seal the oil and gas layer has become a special treatment method besides conventional means.

[0003] There are two typical characteristics of using this method to deal with hidden danger wells. First, due to the long drilling history of abandoned hidden danger wells, the wellbore trajectory inclination data error is large, and it is difficult to achieve a hit in one go during directional rescue, and even multiple trial drillings still fail to find the hidden danger well. Second, hidden danger wells are generally completed with casing, and there are fish in some wellbores, which produce magnetic interference to the MWD inclination measurement tool. When the rescue well is drilled nearby, the location of the hidden danger well can be detected more accurately by magnetic positioning detection technology. These two characteristics determine that the treatment method of connecting the hidden danger well and sealing the well through the rescue well must be to drill multiple wells, cooperate with magnetic positioning technology, detect one by one, and adjust the trajectory in real time to approach the hidden danger well until the collision connection is successful. If the magnetic interference of the casing or fish in the hidden danger well is not detected during the first trial drilling due to the error in the hidden danger well trajectory data or the error in the control of the rescue well trajectory, the target point of adjusting the trajectory for the second trial drilling is very blind, resulting in a significant reduction in the possibility of collision connection, and multiple invalid trial drillings of the wellbore are carried out, resulting in a waste of drilling costs and failure of rescue connection. Therefore, during the drilling design stage of the rescue well, combining the magnetic positioning technology used on site, scientifically and rationally determining the engineering targets for multiple test drillings and designing the wellbore trajectory for collision connection is an effective guarantee for improving the success rate of a single test drilling and reducing the number of test drillings. Summary of the invention

[0004] The purpose of the present invention is to provide a wellbore trajectory design method, device, equipment and medium for a rescue well to improve the defects existing in the above-mentioned method of drilling a new well next to the hidden danger well, connecting it with the hidden danger well in the form of a rescue well and squeezing cement to seal the oil and gas layer to treat the hidden danger well.

[0005] In order to achieve the above objectives, the present application provides the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a method for designing a wellbore trajectory of a rescue well, the method comprising:

[0007] According to the measured well trajectory data of the target well, a long vertical well section or a long stable inclined well section on the trajectory is selected as the target connected well section;

[0008] Taking the midpoint of the target connected well section as the first engineering target point of the first trial drilling connection, and recording the spatial coordinate data of the first engineering target point, the spatial coordinate data including the geodetic coordinates and the vertical depth;

[0009] Draw a preliminary wellbore trajectory from the wellhead of the new well to the first engineering target point, and obtain the first vertex coordinate corresponding to the top endpoint of the last stable inclination section of the preliminary wellbore trajectory and the second vertex coordinate corresponding to the top endpoint of the target connected well section, wherein the last stable inclination section is a section where the well inclination angle and azimuth angle no longer change;

[0010] Construct a first plane based on the first engineering target point, the first vertex coordinates and the second vertex coordinates, and construct a first straight line perpendicular to the first plane and passing through the first engineering target point;

[0011] Determine a first backup engineering target point and a second backup engineering target point on the first straight line, wherein the first backup engineering target point and the second backup engineering target point are points on the first straight line that are 2r away from the first engineering target point, where r is an effective detection range of the magnetic positioning detection technology used;

[0012] Constructing a second straight line in the first plane that passes through the first engineering target point and is perpendicular to the target connected well section, determining a third backup engineering target point and a fourth backup engineering target point on the second straight line, wherein the third backup engineering target point and the fourth backup engineering target point are points on the second straight line that are 2r away from the first engineering target point, where r is the effective detection range of the magnetic positioning detection technology used;

[0013] Determine the well inclination angle of the last wellbore trajectory before hitting the target in the new drilling, and design multiple final wellbore trajectories from the drilling wellhead to the engineering target points T1, T2, T3, T4, and T5 respectively. Design the last wellbore trajectory before hitting the target corresponding to each final wellbore trajectory based on the well inclination angle.

[0014] Optionally, the distance between the target connected well section and the top boundary of the oil and gas layer should be greater than a first preset value, and the pressure value of the formation where the target connected well section is located should be greater than a second preset value.

[0015] Optionally, determining the well inclination angle of the last section of the wellbore trajectory before the new well is drilled and hits the target includes:

[0016] When |α Az0T1 -α Az1T1 |≤90°,

[0017] When |α Az0T1 -α Az1T1 |>90°,

[0018] Among them, α Az0T1 The direction from the wellhead of the hidden danger well to the target point T1; α Az1T1 To design the azimuth from the wellhead to the target point T1 of the new well; α De0 is the average wellbore inclination angle of the target connected well section of the well with hidden dangers to be treated; l0 is the inclination measurement interval of the directional measurement instrument used.

[0019] In a second aspect, an embodiment of the present application provides a wellbore trajectory design device for a rescue well, the device comprising:

[0020] The first acquisition module selects a long vertical well section or a long stable inclined well section on the trajectory as the target connected well section according to the measured well trajectory data of the target well;

[0021] A recording module, taking the midpoint of the target connected well section as the first engineering target point of the first trial drilling connection, and recording the spatial coordinate data of the first engineering target point, wherein the spatial coordinate data includes geodetic coordinates and vertical depth;

[0022] The second acquisition module draws a preliminary wellbore trajectory from the wellhead of the new well to the first engineering target point, and obtains the first vertex coordinate corresponding to the top endpoint of the last stable inclination section of the preliminary wellbore trajectory and the second vertex coordinate corresponding to the top endpoint of the target connected well section, wherein the last stable inclination section is a section where the well inclination angle and azimuth angle no longer change;

[0023] A construction module, constructing a first plane based on the first engineering target point, the first vertex coordinates and the second vertex coordinates, and constructing a first straight line perpendicular to the first plane and passing through the first engineering target point;

[0024] A third acquisition module is configured to determine a first backup engineering target point and a second backup engineering target point on the first straight line, wherein the first backup engineering target point and the second backup engineering target point are points on the first straight line that are 2r away from the first engineering target point, where r is an effective detection range of the magnetic positioning detection technology used;

[0025] A fourth acquisition module is configured to construct a second straight line in the first plane that passes through the first engineering target point and is perpendicular to the target connected well section, and determine a third backup engineering target point and a fourth backup engineering target point on the second straight line, wherein the third backup engineering target point and the fourth backup engineering target point are points on the second straight line that are 2r away from the first engineering target point, where r is the effective detection range of the magnetic positioning detection technology used;

[0026] The planning module determines the well inclination angle of the last wellbore trajectory before hitting the target in the new drilling, and designs multiple final wellbore trajectories from the drilling wellhead to the engineering target points T1, T2, T3, T4, and T5 respectively. Based on the well inclination angle, the last wellbore trajectory before hitting the target corresponding to each final wellbore trajectory is designed.

[0027] Optionally, the first acquisition module includes:

[0028] The comparison unit is configured such that the distance between the target connected well section and the top boundary of the oil and gas layer should be greater than a first preset value, and the pressure value of the formation where the target connected well section is located should be greater than a second preset value.

[0029] Optionally, the planning module includes:

[0030] When |α Az0T1 -α Az1T1 |≤90°,

[0031] When |α Az0T1 -α Az1T1 |>90°,

[0032] Among them, α Az0T1 The direction from the wellhead of the hidden danger well to the target point T1; α Az1T1 To design the azimuth from the wellhead to the target point T1 of the new well; α De0 is the average wellbore inclination angle of the target connected well section of the well with hidden dangers to be treated; l0 is the inclination measurement interval of the directional measurement instrument used.

[0033] In a third aspect, an embodiment of the present application provides a wellbore trajectory design device for a rescue well, the device comprising a memory and a processor.

[0034] Memory is used to store computer programs;

[0035] The processor is used to implement the steps of the wellbore trajectory design method for the rescue well when executing the program stored in the memory.

[0036] In a fourth aspect, an embodiment of the present application provides a medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the wellbore trajectory design method for the above-mentioned rescue well.

[0037] The beneficial effects of the present invention are:

[0038] The present invention provides a wellbore trajectory design method for a rescue well. According to the trajectory of a target well, a drilling trajectory connecting a collision point and a collision section is designed to improve the success rate of a single trial drilling connection, reduce the number of trial drillings, and eliminate the risk hazards of the target well after connection.

[0039] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by implementing the embodiments of the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 It is a schematic diagram of the steps of a method for designing a wellbore trajectory of a rescue well described in an embodiment of the present invention;

[0042] Figure 2 is a schematic diagram of a process for determining engineering targets T2 and T3 in an embodiment of the present invention;

[0043] Figure 3 is a schematic diagram of a process for determining engineering targets T4 and T5 in an embodiment of the present invention;

[0044] Figure 4 In the embodiment of the present invention, when |α Az0T1 -α Az1T1 |≤90°, horizontal projection diagram of the azimuth from the wellhead of the target well to the target point T1 and the azimuth from the wellhead of the rescue well to the target point T1;

[0045] Figure 5 In the embodiment of the present invention, when |α Az0T1 -α Az1T1 |≤90°, a flow chart of determining the well inclination angle of the last section of the wellbore trajectory before the rescue well hits the target;

[0046] Figure 6 In the embodiment of the present invention, when |αAz0T1 -α Az1T1 |>90°, horizontal projection diagram of the azimuth from the wellhead of the target well to the target point T1 and the azimuth from the wellhead of the rescue well to the target point T1;

[0047] Figure 7 In the embodiment of the present invention, when |α Az0T1 -α Az1T1 |>90°, a flow chart showing the process of determining the well inclination angle of the last section of the wellbore trajectory before the rescue well hits the target;

[0048] Figure 8 It is a flow chart of a wellbore trajectory design method for a rescue well of the present invention;

[0049] Fig. 9 The present invention is a flow chart of a wellbore trajectory design device for a rescue well.

[0050] Fig.10 The present invention is a flow chart of a wellbore trajectory design device for a rescue well. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0052] It should be noted that similar reference numerals or letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0053] Example 1

[0054] like Figure 1 As shown, this embodiment provides a method for designing a wellbore trajectory of a rescue well, and the method includes: step S100, step S200, step S300, step S400, step S500, step S600 and step S700.

[0055] Step S100, according to the measured well trajectory data of the target well, selecting a long straight well section or a long stable inclined well section on the trajectory as the target connected well section;

[0056] Step S200, taking the midpoint of the target connected well section as the first engineering target point for the first trial drilling connection, and recording the spatial coordinate data of the first engineering target point, the spatial coordinate data including the geodetic coordinates and the vertical depth;

[0057] Step S300, drawing a preliminary wellbore trajectory from the wellhead of the new drilling to the first engineering target point, and obtaining the first vertex coordinate corresponding to the top endpoint of the last stable inclination section of the preliminary wellbore trajectory and the second vertex coordinate corresponding to the top endpoint of the target connected well section, wherein the last stable inclination section is a section where the well inclination angle and azimuth angle no longer change;

[0058] Step S400, constructing a first plane based on the first engineering target point, the first vertex coordinates and the second vertex coordinates, and constructing a first straight line perpendicular to the first plane and passing through the first engineering target point;

[0059] Step S500, determining a first backup engineering target point and a second backup engineering target point on the first straight line, wherein the first backup engineering target point and the second backup engineering target point are points on the first straight line that are 2r away from the first engineering target point, where r is an effective detection range of the magnetic positioning detection technology used;

[0060] Step S600, constructing a second straight line in the first plane that passes through the first engineering target point and is perpendicular to the target connected well section, determining a third backup engineering target point and a fourth backup engineering target point on the second straight line, wherein the third backup engineering target point and the fourth backup engineering target point are points on the second straight line that are 2r away from the first engineering target point, where r is the effective detection range of the magnetic positioning detection technology used;

[0061] Step S700, determine the well inclination angle of the last wellbore trajectory before hitting the target in the new drilling, and design multiple final wellbore trajectories from the drilling wellhead to the engineering target points T1, T2, T3, T4, and T5 respectively, and design the last wellbore trajectory before hitting the target corresponding to each final wellbore trajectory based on the well inclination angle.

[0062] Secondly, in step S100, the distance between the target connected well section and the top boundary of the oil and gas layer should be greater than a first preset value, and the pressure value of the formation where the target connected well section is located should be greater than a second preset value.

[0063] Secondly, in step S700, the well inclination angle of the last section of the wellbore trajectory before the new drilling is designed to hit the target is determined, including:

[0064] When |α Az0T1 -α Az1T1 |≤90°,

[0065] When |α Az0T1 -α Az1T1 |>90°,

[0066] Among them, α Az0T1 The direction from the wellhead of the hidden danger well to the target point T1; α Az1T1 To design the azimuth from the wellhead to the target point T1 of the new well; α De0 is the average wellbore inclination angle of the target connected well section of the well with hidden dangers to be treated; l0 is the inclination measurement interval of the directional measurement instrument used.

[0067] The present invention provides a wellbore trajectory design method for a rescue well, the design method comprising the following steps:

[0068] (1) According to the measured well trajectory of the target well, a long vertical well section or a long stable inclined section (well inclination angle and azimuth angle are basically the same) on the trajectory is selected as the target connected well section. The connected well section should be within a certain distance above the top boundary of the oil and gas layer, and the formation is stable and has a certain pressure bearing capacity;

[0069] (2) Take the midpoint of the target connected well section as the engineering target point T1 for the first trial drilling connection. Its spatial coordinates are (E1, N1, H1), where E1 and N1 are geodetic coordinates and H1 is the vertical depth corresponding to the target point T1;

[0070] (3) Design the preliminary wellbore trajectory from the wellhead to the engineering target point T1. Take the top point A (the coordinates of the first vertex) (E A , N A , H A ), take the top point of the target connected well section (the coordinates of the second vertex) B(E B , N B , H B );

[0071] (4) Determine a plane passing through points A, B, and T1, and draw a first straight line L1 perpendicular to the plane passing through the engineering target point T1;

[0072] (5) Take two points on the straight line L1 with a distance of 2r from T1 as the backup engineering targets T2 (E2, N2, H2) and T3 (E3, N3, H3), where r is the effective detection range of the magnetic positioning detection technology used, as shown in Figure 2 As shown;

[0073] (6) In the plane defined by the three points A, B, and T1, a second straight line L2 is drawn through the engineering target point T1 and is perpendicular to the trajectory of the target connected well section;

[0074] (7) Take two points on the straight line L2 with a distance of 2r from T1 as the backup engineering targets T4 (E4, N4, H4) and T5 (E5, N5, H5), as follows: Figure 3 As shown;

[0075] (8) Determine the inclination angle parameter α of the last section of the wellbore trajectory before the new well is hit. De , its value is calculated according to the following conditions:

[0076] When |α Az0T1 -α Az1T1 |≤90°, like Figure 4 and Figure 5 As shown;

[0077] When |α Az0T1 -α Az1T1 |>90°, like Figure 6 and Figure 7 As shown;

[0078] Among them, α Az0T1 The direction from the wellhead of the hidden danger well to the target point T1; α Az1T1 To design the azimuth from the wellhead to the target point T1 of the new well; α De0 is the average wellbore inclination angle of the target connected well section of the well with hidden dangers to be treated; l0 is the inclination measurement interval of the directional measurement instrument used.

[0079] (9) Figure 8 As shown in the figure, the final borehole trajectories are designed from the newly drilled wellhead to the engineering target points T1, T2, T3, T4, and T5, respectively. The well inclination parameter of the last wellbore trajectory before hitting the target is the well inclination angle parameter α determined in step (8). De The azimuth parameters are determined according to the target point, well inclination angle, and the deflection efficiency of the directional tool used, according to the conventional single well trajectory design method. The wellbore trajectory of other upper well sections can meet the drilling anti-collision, directional deflection or other drilling construction restrictions.

[0080] Example 2

[0081] In a second aspect, an embodiment of the present application provides a wellbore trajectory design device for a rescue well, the device comprising:

[0082] The first acquisition module 71 selects a long vertical well section or a long stable inclined well section on the trajectory as a target connected well section according to the measured well trajectory data of the target well;

[0083] The recording module 72 takes the midpoint of the target connected well section as the first engineering target point of the first trial drilling connection, and records the spatial coordinate data of the first engineering target point, wherein the spatial coordinate data includes the geodetic coordinates and the vertical depth;

[0084] The second acquisition module 73 draws a preliminary wellbore trajectory from the wellhead of the new well to the first engineering target point, and obtains the first vertex coordinate corresponding to the top endpoint of the last stable inclination section of the preliminary wellbore trajectory and the second vertex coordinate corresponding to the top endpoint of the target connected well section, wherein the last stable inclination section is a section where the well inclination angle and azimuth angle no longer change;

[0085] A construction module 74 constructs a first plane based on the first engineering target point, the first vertex coordinates and the second vertex coordinates, and constructs a first straight line perpendicular to the first plane and passing through the first engineering target point;

[0086] A third acquisition module 75 determines a first backup engineering target point and a second backup engineering target point on the first straight line, wherein the first backup engineering target point and the second backup engineering target point are points on the first straight line that are 2r away from the first engineering target point, where r is an effective detection range of the magnetic positioning detection technology used;

[0087] A fourth acquisition module 76 constructs a second straight line passing through the first engineering target point and perpendicular to the target connected well section in the first plane, and determines a third backup engineering target point and a fourth backup engineering target point on the second straight line, wherein the third backup engineering target point and the fourth backup engineering target point are points on the second straight line that are 2r away from the first engineering target point, where r is an effective detection range of the magnetic positioning detection technology used;

[0088] The planning module 77 determines the well inclination angle of the last wellbore trajectory before hitting the target in the new drilling, and designs multiple final wellbore trajectories from the drilling wellhead to the engineering target points T1, T2, T3, T4, and T5 respectively, and designs the last wellbore trajectory before hitting the target corresponding to each final wellbore trajectory based on the well inclination angle.

[0089] In this embodiment, if Fig. 9 As shown, the first acquisition module 71 includes:

[0090] Comparison unit 711, the distance between the target connected well section and the top boundary of the oil and gas layer should be greater than a first preset value, and the pressure value of the formation where the target connected well section is located should be greater than a second preset value.

[0091] In this embodiment, the planning module 77 includes:

[0092] When |α Az0T1 -α Az1T1 |≤90°,

[0093] When |α Az0T1 -α Az1T1 |>90°,

[0094] Among them, α Az0T1 The direction from the wellhead of the hidden danger well to the target point T1; α Az1T1 To design the azimuth from the wellhead to the target point T1 of the new well; α De0 is the average wellbore inclination angle of the target connected well section of the well with hidden dangers to be treated; l0 is the inclination measurement interval of the directional measurement instrument used.

[0095] Example 3

[0096] In a third aspect, an embodiment of the present application provides a wellbore trajectory design device for a rescue well. The wellbore trajectory design device for a rescue well described below and the wellbore trajectory design method for a rescue well described above can refer to each other.

[0097] Fig.10 FIG. 8 is a block diagram of a wellbore trajectory design device 800 for a rescue well according to Embodiment 1. Fig.10 As shown, the electronic device 800 may include: a processor 801 and a memory 802. The electronic device 800 may also include one or more of a multimedia component 803, an I / O interface 804, and a communication component 805.

[0098] The processor 801 is used to control the overall operation of the electronic device 800 to complete all or part of the steps in the sandstone thermal reservoir geothermal well perforation layout method. The memory 802 is used to store various types of data to support the operation of the electronic device 800. For example, these data may include instructions for any application or method used to operate on the electronic device 800, and application-related data, such as contact data, sent and received messages, pictures, audio, video, etc. The memory 802 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, disk or optical disk. The multimedia component 803 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone, which is used to receive external audio signals. The received audio signal may be further stored in the memory 802 or sent through the communication component 805. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 804 provides an interface between the processor 801 and other interface modules, and the above-mentioned other interface modules may be keyboards, mice, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 805 is used for wired or wireless communication between the electronic device 800 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G or 4G, or a combination of one or more of them, so the corresponding communication component 805 may include: Wi-Fi module, Bluetooth module, NFC module.

[0099] In an exemplary embodiment, the electronic device 800 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned wellbore trajectory design method for the rescue well.

[0100] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the wellbore trajectory design method for the rescue well are implemented. For example, the computer-readable storage medium may be the memory 802 including the program instructions, and the program instructions may be executed by the processor 801 of the electronic device 800 to complete the wellbore trajectory design method for the rescue well.

[0101] Example 4

[0102] Corresponding to the above method embodiment, the embodiment of the present disclosure further provides a readable storage medium. The readable storage medium described below and the wellbore trajectory design method for a rescue well described above can refer to each other.

[0103] A readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the method for designing a wellbore trajectory of a rescue well in the above method embodiment.

[0104] The readable storage medium may specifically be a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, or other readable storage medium that can store program codes.

[0105] Example 5

[0106] In order to make the objectives, technical solutions and advantages of the present invention more clear, the implementation methods of the technical methods in the present invention will be further described in detail below.

[0107] (1) A well with hidden dangers to be treated, the wellhead coordinates are (0.00, 0.00), according to the drilling trajectory and oil and gas layer conditions, the stable inclination section 2125-2250m is selected as the target connection well section, and the trajectory parameters of this section are shown in Table 1. The wellhead coordinates of the rescue well are (30.00, 30.00), the inclination rate of the directional tool used is 2.4° / 30m, the effective detection range of magnetic positioning is 2.5m, and the inclination measurement interval is 30m.

[0108] Table 1 Trajectory data of target connected well sections of a potential well to be treated

[0109]

[0110] (2) The midpoint of the target connected well section (vertical depth 2000m) is selected as the engineering target point T1, with coordinates of (726.36, 0.00, 2000).

[0111] (3) Make a preliminary wellbore trajectory from the wellhead of the rescue well to T1. The trajectory data of the stable inclination section before hitting the target are shown in Table 2:

[0112] Table 2 Track data of the pre-target stable inclination section in the preliminary track design of the rescue well

[0113]

[0114] Take the top point A (679.86, -29.29, 1970) of the last track before the target in the preliminary track design of the rescue well and the top point B (709.07, 0.00, 1970) of the target well connecting section, and determine the plane with the engineering target point T1 (726.36, 0.00, 2000), and make a straight line L1 perpendicular to the plane through the target point T1;

[0115] (4) Select two points on the straight line L1 with a distance of 5 m from T1 as the backup engineering target points T2 (696.16, -34.90, 2000) and T3 (696.56, -25.10, 2000).

[0116] (5) In the plane defined by points A, B, and T1, a straight line L2 is drawn through the engineering target point T1 and is perpendicular to the trajectory of the target connected well section.

[0117] (6) Select two points on straight line L2, 5 m away from T1, as backup engineering target points T4 (700.59, -30.20, 1997.5) and T5 (692.13, -29.80, 2002.5).

[0118] (7) Determine the inclination angle parameter α of the last section of the wellbore trajectory before the rescue well hits the target De .

[0119] αAz0T1 =0°

[0120] α Az1T1 =357.53°

[0121] Judgment condition: |α Az0T1 -α Az1T1 |>90°

[0122] Average well inclination angle α of target well and target connected well section De0 =30°

[0123] therefore

[0124] (8) The final borehole trajectory designed from the rescue wellhead to the engineering target points T1, T2, T3, T4, and T5, and the well inclination angle α of the last section of the borehole trajectory before hitting the target De =25.24°, the azimuth is determined according to the target situation, well inclination and the directional tool build-up rate of 2.4° / 30m. The last segment data of each designed trajectory are shown in Tables 3 to 7.

[0125] Table 3 Design data of the last section of the track before the rescue well hits the target (T1)

[0126]

[0127]

[0128] Table 4 Design data of the last track before the rescue well hits the target (T2)

[0129]

[0130] Table 5 Design data of the last track before the rescue well hits the target (T3)

[0131]

[0132]

[0133] Table 6 Design data of the last section of the track before the rescue well hits the target (T4)

[0134]

[0135] Table 7 Design data of the last track before the rescue well hits the target (T5)

[0136]

[0137] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for designing a wellbore trajectory of a rescue well, characterized in that: The method comprises: According to the measured well trajectory data of the target well, a long vertical well section or a long stable inclined well section on the trajectory is selected as the target connected well section; Taking the midpoint of the target connected well section as the first engineering target point of the first trial drilling connection, and recording the spatial coordinate data of the first engineering target point, the spatial coordinate data including the geodetic coordinates and the vertical depth; Draw a preliminary wellbore trajectory from the wellhead of the new well to the first engineering target point, and obtain the first vertex coordinate corresponding to the top endpoint of the last stable inclination section of the preliminary wellbore trajectory and the second vertex coordinate corresponding to the top endpoint of the target connected well section, wherein the last stable inclination section is a section where the well inclination angle and azimuth angle no longer change; Construct a first plane based on the first engineering target point, the first vertex coordinates and the second vertex coordinates, and construct a first straight line perpendicular to the first plane and passing through the first engineering target point; Determine a first backup engineering target point and a second backup engineering target point on the first straight line, wherein the first backup engineering target point and the second backup engineering target point are points on the first straight line that are 2r away from the first engineering target point, where r is an effective detection range of the magnetic positioning detection technology used; Constructing a second straight line in the first plane that passes through the first engineering target point and is perpendicular to the target connected well section, determining a third backup engineering target point and a fourth backup engineering target point on the second straight line, wherein the third backup engineering target point and the fourth backup engineering target point are points on the second straight line that are 2r away from the first engineering target point, where r is the effective detection range of the magnetic positioning detection technology used; Determine the well inclination angle of the last wellbore trajectory before hitting the target in the new drilling, and design multiple final wellbore trajectories from the drilling wellhead to the engineering target points T1, T2, T3, T4, and T5 respectively. Design the last wellbore trajectory before hitting the target corresponding to each final wellbore trajectory based on the well inclination angle.

2. A method for designing a wellbore trajectory of a rescue well according to claim 1, characterized in that: The distance between the target connected well section and the top boundary of the oil and gas layer should be greater than a first preset value, and the pressure value of the formation where the target connected well section is located should be greater than a second preset value.

3. A method for designing a wellbore trajectory of a rescue well according to claim 1, characterized in that: Determine the well inclination angle of the last section of the wellbore trajectory before the new well is drilled, including: When |α Az0T1 -α Az1T1 |≤90°, When |α Az0T1 -α Az1T1 |>90°, Among them, α Az0T1 The direction from the wellhead of the hidden danger well to the target point T1; α Az1T1 To design the azimuth from the wellhead to the target point T1 of the new well; α De0 is the average wellbore inclination angle of the target connected well section of the well with hidden dangers to be treated; l0 is the inclination measurement interval of the directional measurement instrument used.

4. A wellbore trajectory design device for a rescue well, characterized in that: The device comprises: The first acquisition module selects a long vertical well section or a long stable inclined well section on the trajectory as the target connected well section according to the measured well trajectory data of the target well; A recording module, taking the midpoint of the target connected well section as the first engineering target point of the first trial drilling connection, and recording the spatial coordinate data of the first engineering target point, wherein the spatial coordinate data includes geodetic coordinates and vertical depth; The second acquisition module draws a preliminary wellbore trajectory from the wellhead of the new well to the first engineering target point, and obtains the first vertex coordinate corresponding to the top endpoint of the last stable inclination section of the preliminary wellbore trajectory and the second vertex coordinate corresponding to the top endpoint of the target connected well section, wherein the last stable inclination section is a section where the well inclination angle and azimuth angle no longer change; A construction module, constructing a first plane based on the first engineering target point, the first vertex coordinates and the second vertex coordinates, and constructing a first straight line perpendicular to the first plane and passing through the first engineering target point; A third acquisition module is configured to determine a first backup engineering target point and a second backup engineering target point on the first straight line, wherein the first backup engineering target point and the second backup engineering target point are points on the first straight line that are 2r away from the first engineering target point, where r is an effective detection range of the magnetic positioning detection technology used; A fourth acquisition module is configured to construct a second straight line in the first plane that passes through the first engineering target point and is perpendicular to the target connected well section, and determine a third backup engineering target point and a fourth backup engineering target point on the second straight line, wherein the third backup engineering target point and the fourth backup engineering target point are points on the second straight line that are 2r away from the first engineering target point, where r is an effective detection range of the magnetic positioning detection technology used; The planning module determines the well inclination angle of the last wellbore trajectory before hitting the target in the new drilling, and designs multiple final wellbore trajectories from the drilling wellhead to the engineering target points T1, T2, T3, T4, and T5 respectively. Based on the well inclination angle, the last wellbore trajectory before hitting the target corresponding to each final wellbore trajectory is designed.

5. A wellbore trajectory design device for a rescue well according to claim 4, characterized in that: The first acquisition module includes: The comparison unit is configured such that the distance between the target connected well section and the top boundary of the oil and gas layer should be greater than a first preset value, and the pressure value of the formation where the target connected well section is located should be greater than a second preset value.

6. A wellbore trajectory design device for a rescue well according to claim 4, characterized in that: The planning module includes: When |α Az0r1 -α Az1T1 |≤90°, When |α Az0T1 -α Az1T1 |>90°, Among them, α Az0T1 The direction from the wellhead of the hidden danger well to the target point T1; α Az1T1 To design the azimuth from the wellhead to the target point T1 of the new well; α De0 is the average wellbore inclination angle of the target connected well section of the well with hidden dangers to be treated; l0 is the inclination measurement interval of the directional measurement instrument used.

7. A wellbore trajectory design device for a rescue well, characterized in that: The device comprises a memory and a processor; Memory, used to store computer programs; A processor, used to implement the method steps described in any one of claims 1-3 when executing a program stored in a memory.

8. A medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method steps described in any one of claims 1 to 3 are implemented.

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