A down-the-hole ranging device, method, system and electronic device for drilling parallel wells

Abstract

This invention belongs to the field of drilling technology, specifically relating to a distance measurement while drilling (TMS) device, method, system, and electronic equipment for parallel wells, aiming to solve the problem of improving the drilling efficiency of parallel wells. The invention includes: calculating the triaxial magnetic field standard value of a fluxgate sensor; running the TMS device into the upper parallel well, activating the upper parallel well drill string, stopping the upper parallel well drill string after receiving the gravity high-side signal from the gravity acceleration sensor of the device, adjusting the high-side direction of the fluxgate sensor so that the second fluxgate sensor is directly facing the casing of the lower parallel well; reactivating the upper parallel well drill string, continuously measuring the magnetic field signal of the casing of the lower parallel well through the fluxgate sensor, and determining the casing direction of the lower parallel well and the spatial magnetic field distance between the upper and lower parallel wells based on the magnetic field signal and the triaxial magnetic field standard value. This invention only requires operation in the upper parallel well, has a simple process, and significantly improves the drilling efficiency of parallel wells.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of drilling, and particularly relates to a downhole ranging device, method and system for up-and-down parallel wells and an electronic device. BACKGROUND

[0002] The existing parallel well (also referred to as parallel horizontal well) drilling is to first drill a first well downward, and then drill a second well upward, the wellheads of the two wells are adjacent, and the wellbore azimuths and the track profile types are the same. The first well (also referred to as casing well or down parallel well) is drilled to completion by using conventional drilling-while-seeing technology, and then a casing is run in. The second well (also referred to as straight drilling well or up parallel well) is drilled to keep parallel with the first well. After drilling to a target point, a bent-screw drilling assembly is pulled out, a strong magnetic joint drilling assembly is run in, and an alternating magnetic field is formed during rotation of the strong magnetic joint. At the same time, a magnetic guidance receiver is pumped into the casing of the first well to a measuring position, and the magnetic guidance receiver is moved to collect and measure the magnetic signal of the strong magnetic joint of the second well. The magnetic guidance receiver of the first well uploads the measurement data to a ground computer every time a set of measurements is completed. The spatial position of the casing is calculated by the ground computer, and then the drilling trajectory of the second well is calculated according to the spatial position. The drilling trajectory of the second well is controlled according to the drilling trajectory, so that the directions of the two wells are the same and the vertical depth difference is a specific value. Then the magnetic guidance receiver is moved, and the above process is repeated until the second well is drilled to completion.

[0003] The existing parallel well drilling must be operated simultaneously for the two wells, which has poor timeliness, complex process flow and management, and the problem of stopping during operation exists, so the comprehensive operation efficiency is low and the cost is high. Therefore, how to simplify the parallel well drilling process and improve the parallel well drilling efficiency is a problem to be solved. SUMMARY

[0004] In order to solve the above problems in the prior art, that is, to improve the parallel well drilling efficiency, the application provides a downhole ranging device for up-and-down parallel wells, which is applied to an up parallel well and includes:

[0005] A non-magnetic drill pipe;

[0006] An upper end non-magnetic sub, one end of the upper end non-magnetic sub being connected with the non-magnetic drill pipe;

[0007] A drilling-while-measuring magnetic ranging assembly, the other end of the upper end non-magnetic sub being connected with one end of a housing, the housing forming an internal space, the drilling-while-measuring magnetic ranging assembly further including a gravity acceleration sensor, a drilling-while-measuring instrument and a first fluxgate sensor arranged in the internal space;

[0008] A second fluxgate sensor arranged on a side of the housing away from the internal space;

[0009] a lower end non-magnetic short section, one end of the lower end non-magnetic short section being connected to the end of the housing away from the upper end non-magnetic short section, the other end of the lower end non-magnetic short section being connected to a drilling tool.

[0010] The upper end non-magnetic short section and the lower end non-magnetic short section are used to shield the axial magnetism of the drilling tool, the position of the first magnetic flux gate sensor is a node, the direction from the node to the upper end non-magnetic short section is a first direction, and the direction from the node to the lower end non-magnetic short section is a second direction. The length of the upper end non-magnetic short section satisfies that the first drilling tool axial interference magnetic field intensity value in the first direction tends to zero, and the length of the lower end non-magnetic short section satisfies that the second drilling tool axial interference magnetic field intensity value in the second direction tends to zero. The first drilling tool axial interference magnetic field intensity value in the first direction is The second drilling tool axial interference magnetic field intensity value in the second direction is wherein, is the magnetic flux density of the drilling tool in the first direction, is the magnetic flux density of the drilling tool in the second direction, is the length of the upper end non-magnetic short section, is the length of the lower end non-magnetic short section.

[0011] In another aspect of the present application, a method for ranging while drilling in upper and lower parallel wells is provided, which uses the ranging while drilling device for upper and lower parallel wells described above, and the method comprises:

[0012] calculating a three-axis magnetic field standard value of the second magnetic flux gate sensor in the current upper parallel well borehole azimuth according to a geomagnetic field model, the three-axis magnetic field standard value comprising an X-axis magnetic field standard value, a Y-axis magnetic field standard value and a Z-axis magnetic field standard value;

[0013] starting the drilling tool of the upper parallel well, adjusting the high side direction of the second magnetic flux gate sensor after receiving the high side signal of the gravity acceleration sensor, so that the second magnetic flux gate sensor faces the casing of the lower parallel well, and stopping the drilling tool of the upper parallel well;

[0014] starting the drilling tool of the upper parallel well again, continuously measuring the magnetic field signal of the casing of the lower parallel well through the second magnetic flux gate sensor, and determining the casing direction of the lower parallel well and the spatial magnetic field distance between the upper parallel well and the lower parallel well at each measurement point according to the magnetic field signal and the three-axis magnetic field standard value, the measurement point being the measurement position of the second magnetic flux gate sensor on the casing.

[0015] Optionally, the Z-axis magnetic field standard value is: wherein B is a standard magnetic field total intensity, which is calculated according to a geomagnetic field model, is a standard geomagnetic inclination, and B and According to the geomagnetic field model, is the inclination angle of the upper parallel well, is the azimuth angle of the upper parallel well; the X-axis magnetic field standard value , wherein f is the high-side tool face angle of the upper parallel well; the Y-axis magnetic field standard value .

[0016] Optionally, in the method, the determination of the casing direction of the lower parallel well at each measuring point according to the magnetic field signal and the three-axis magnetic field standard value comprises:

[0017] determining the casing high-side azimuth angle of the lower parallel well , wherein is the X-axis abnormal magnetic field value, , is the X-axis magnetic field actual measurement value obtained according to the magnetic field signal, is the X-axis magnetic field standard value, is the Y-axis abnormal magnetic field value, , is the Y-axis magnetic field actual measurement value obtained according to the magnetic field signal, is the Y-axis magnetic field standard value;

[0018] determining the casing direction according to the casing high-side azimuth angle .

[0019] Optionally, the determination of the casing direction according to the casing high-side azimuth angle comprises:

[0020] if the casing high-side azimuth angle is positive, it is determined that the casing direction is on the right side of the wellbore high side of the upper parallel well;

[0021] if the casing high-side azimuth angle is negative, it is determined that the casing direction is on the left side of the wellbore high side of the upper parallel well;

[0022] wherein, with the wellbore axis heading angle of the upper parallel well as the reference, the casing high-side azimuth angle 0° means that the lower parallel well is directly above the wellbore of the upper parallel well, when the casing high-side azimuth angle is positive, the wellbore azimuth angle of the lower parallel well is greater than that of the upper parallel well, which defines that the casing direction of the lower parallel well is on the right side of the wellbore high side of the upper parallel well; when the casing high-side azimuth angle is negative, the wellbore azimuth angle of the lower parallel well is less than that of the upper parallel well, which defines that the casing direction of the lower parallel well is on the left side of the wellbore high side of the upper parallel well.

[0023] Optionally, in the method, the determining the spatial magnetic field distance between the upper parallel well and the lower parallel well according to the magnetic field signal and the three-axis magnetic field standard value comprises:

[0024] calculating the spatial magnetic field distance wherein, is a Z-axis abnormal magnetic field value, , is a Z-axis magnetic field actual measurement value obtained according to the magnetic field signal, is a Z-axis magnetic field standard value, is a formation lithology relative permeability, is a drilling fluid relative permeability, is a measurement point relative permeability, is a casing magnetic flux.

[0025] Optionally, in the method, before starting the drilling tool of the upper parallel well and receiving the gravity high-side signal of the gravity acceleration sensor, the method further comprises: when the upper parallel well is drilled to a target point and the hole inclination angle reaches a preset value, placing the upper and lower parallel well while-drilling distance measuring device into the bottom of the upper parallel well.

[0026] Optionally, the method further comprises: controlling the while-drilling trajectory of the bent-helix drill tool according to the casing direction and the spatial magnetic field distance.

[0027] In a third aspect of the present application, an upper and lower parallel well while-drilling distance measuring system is provided, which is based on the above-mentioned upper and lower parallel well while-drilling distance measuring method. The system comprises:

[0028] a magnetic field standard value calculation module, configured to record the three-axis magnetic field standard value of the second fluxgate sensor when the lower parallel well is not placed with a casing, the three-axis magnetic field standard value comprising an X-axis magnetic field standard value, a Y-axis magnetic field standard value and a Z-axis magnetic field standard value;

[0029] a fluxgate sensor control module, configured to start the drilling tool of the upper parallel well, after receiving the gravity high-side signal of the gravity acceleration sensor, adjust the high-side direction of the second fluxgate sensor, for example, make the high-side angle of the second fluxgate sensor reach 180°, so that the second fluxgate sensor faces the casing of the lower parallel well, and then stop the drilling tool of the upper parallel well;

[0030] a magnetic field measurement module, configured to start the drilling tool of the upper parallel well again, and continuously measure the magnetic field signal of the casing of the lower parallel well through the second fluxgate sensor;

[0031] a ranging module configured to determine the casing direction of the lower parallel well and the spatial magnetic field distance between the upper parallel well and the lower parallel well according to the magnetic field signal and the three-axis magnetic field standard value, the measuring point being the measuring position of the second fluxgate sensor on the casing.

[0032] In a fourth aspect, the present application provides an electronic device, which comprises:

[0033] at least one processor; and

[0034] a memory in communication with the at least one processor; wherein

[0035] the memory stores instructions executable by the processor, and the instructions are configured to be executed by the processor to implement the ranging method for upper and lower parallel wells while drilling.

[0036] In a fifth aspect, the present application provides a computer readable storage medium, which stores computer instructions, and the computer instructions are configured to be executed by a computer to implement the ranging method for upper and lower parallel wells while drilling.

[0037] In a sixth aspect, the present application provides a computer program product comprising instructions, which, when executed by a computer device, cause the computer device to perform the ranging method for upper and lower parallel wells while drilling.

[0038] The present application has the following beneficial effects:

[0039] The ranging device for upper and lower parallel wells while drilling comprises a non-magnetic short section, a gravity acceleration sensor and a fluxgate sensor for drilling while drilling, and the non-magnetic short section is used to shield the axial magnetic field interference of the drilling tool to ensure the accuracy and precision of the fluxgate sensor. After the casing of the lower parallel well, the ranging device for drilling while drilling is lowered into the upper parallel well. The ranging method for upper and lower parallel wells while drilling calculates the casing direction of the lower parallel well and the spatial magnetic field distance between the upper parallel well and the lower parallel well by measuring the magnetic field signal of the casing of the lower parallel well by the ranging device for drilling while drilling. Thus, the drilling trajectory of the upper parallel well can be further controlled according to the casing direction and the spatial magnetic field distance, and the drilling trajectory requirements of the upper parallel well can be met. The ranging method for upper and lower parallel wells while drilling provided by the present application only needs to be operated in the upper parallel well, and the process is simple, the cost is reduced, the measurement accuracy is improved by shielding the magnetic field interference, and the ranging device for drilling while drilling can move with the bent helix drill tool, without stopping, which greatly improves the drilling efficiency of the parallel well and the effect of the drilling trajectory control. BRIEF DESCRIPTION OF DRAWINGS

[0040] Other features, objects, and advantages of the application will become more apparent from the following detailed description when read in connection with the following drawings:

[0041] Figure 1 is a structural diagram of a downhole ranging device for up-and-down parallel wells according to the present application;

[0042] Figure 2 is a flowchart of a downhole ranging device for up-and-down parallel wells according to the present application;

[0043] Figure 3 is a structural diagram of a downhole ranging system for up-and-down parallel wells according to the present application;

[0044] Figure 4 is a structural diagram of a computer system of a server for implementing the method, system, and device embodiments of the present application.

[0045] Reference signs: 1 - up parallel well; 2 - down parallel well; 3 - non-magnetic drill pipe; 4 - upper end non-magnetic sub; 5 - downhole magnetic ranging assembly; 6 - downhole measuring instrument; 7 - gravity acceleration sensor; 8 - first fluxgate sensor; 9 - second fluxgate sensor; 10 - lower end non-magnetic sub; 11 - bent sub; 12 - drill bit; 13 - casing magnetic field signal line; 14 - casing. DETAILED DESCRIPTION

[0046] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related application, and are not a limitation on the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for ease of description.

[0047] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0048] The present application provides a downhole ranging device for up-and-down parallel wells, which is applied to an up parallel well 1, as shown in the drawings, and comprises: Figure 1

[0049] a non-magnetic drill pipe 3;

[0050] an upper end non-magnetic sub 4, one end of which is connected with the non-magnetic drill pipe 3;

[0051] a downhole magnetic ranging assembly 5, which comprises a housing, the other end of the upper end non-magnetic sub 4 is connected with one end of the housing, the housing forms an internal space, and the downhole magnetic ranging assembly 5 further comprises a gravity acceleration sensor 7, a downhole measuring instrument 6, and a first fluxgate sensor 8 arranged in the internal space;​

[0052] The second fluxgate sensor 9 is arranged on the side of the housing away from the inner space;

[0053] The lower end non-magnetic short section 10 is connected to the side of the housing away from the upper end non-magnetic short section 4, and the other end of the lower end non-magnetic short section 10 is connected to a drilling tool.

[0054] The upper end non-magnetic short section 4 is connected to one end of the housing of the magnetic ranging assembly while the other end of the upper end non-magnetic short section 4 is connected to one end of the non-magnetic drill pipe 3. The other end of the non-magnetic drill pipe 3 is connected to a wellhead tool, such as a tool for lowering the magnetic ranging device. The other end of the upper end non-magnetic short section 4 is connected to one end of the housing of the magnetic ranging assembly. The magnetic ranging assembly includes the housing, the magnetic ranging device 6, the gravity acceleration sensor 7, and the first fluxgate sensor 8 arranged in the inner space formed by the housing, and the second fluxgate sensor 9 arranged on the outside of the housing. The magnetic ranging assembly serves as the main body for measurement. The other end of the housing of the magnetic ranging assembly is connected to one end of the lower end non-magnetic short section 10. The connection can be a threaded connection, a welding connection, or the like. The other end of the lower end non-magnetic short section 10 is connected to a drilling tool, which serves as a power assembly, to achieve parallel drilling by controlling the drilling trajectory of the drilling tool. The drilling tool can be a bent-helix motor drilling tool, which includes a bent-helix motor 11 and a drill bit 12. The lower end non-magnetic short section can be connected to the bent-helix motor drilling tool through a float valve joint.

[0055] The magnetic ranging assembly 5 can be a tool assembly, and the housing of the magnetic ranging assembly 5 (i.e., the housing of the tool assembly) can be provided with a male or female thread. The upper end non-magnetic short section 4 and the lower end non-magnetic short section 10 are also provided with a male or female thread, and the housing of the magnetic ranging assembly 5 is connected to the upper end non-magnetic short section 4 and the lower end non-magnetic short section 10 through the male or female thread.

[0056] The upper end non-magnetic short section 4 and the lower end non-magnetic short section 10 are used to shield the axial magnetism of the drilling tool to prevent the axial magnetic field of the ferrous drilling tool from interfering with the measured magnetic parameters. To achieve the shielding effect, the upper end non-magnetic short section 4 and the lower end non-magnetic short section 10 need to be designed to a specific length, and the material can be non-magnetic austenitic chromium-nickel steel with a yield strength of 965 MPa. Specifically, taking the position of the first fluxgate sensor as a node, the direction from the node to the upper end non-magnetic short section 4 is a first direction, and the direction from the node to the lower end non-magnetic short section 10 is a second direction. The length of the upper end non-magnetic short section 4 satisfies the condition that the first drilling tool axial interference magnetic field strength value in the first direction tends to zero, and the length of the lower end non-magnetic short section 10 satisfies the condition that the second drilling tool axial interference magnetic field strength value in the second direction tends to zero. The first drilling tool axial interference magnetic field strength value in the first direction is the magnetic field strength value of the drilling tool axial interference magnetic field in the first direction, and the second drilling tool axial interference magnetic field strength value in the second direction is the magnetic field strength value of the drilling tool axial interference magnetic field in the second direction. The second drilling tool axial interference magnetic field strength value wherein, is the magnetic flux density of the drill string in the first direction, is the magnetic flux density of the drill string in the second direction, is the length of the upper end non-magnetic short section 4, is the length of the lower end non-magnetic short section 10. It should be noted that, and are determined in advance, the first drill string axial interference magnetic field strength and the second drill string axial interference magnetic field strength are made to tend to zero by making and less than a preset threshold value. It can be understood that, and are determined by comprehensively considering the requirements of making and small enough, the length of other parts of the up-and-down parallel well while drilling ranging device, the depth of the upper parallel well, and other factors, so as to meet the requirements of the axial magnetic shielding of the drill string while meeting the construction and operation conditions. The upper end non-magnetic short section 4 and the lower end non-magnetic short section 10 can be multiple sections respectively, and the length of the multiple sections meets the above-mentioned conditions.

[0057] After the lower parallel well 2 (also known as a casing well) is completed, the oil casing is lowered into it and cemented, and then the gauss meter is used to measure the magnetic field parameters of the casing magnetic field signal line 13 on the casing 14. Based on the measured pipe body magnetization intensity data and the pipe column cross-sectional area, the magnetic flux of the casing is calculated as a backup parameter for subsequent calculation.

[0058] The above-mentioned up-and-down parallel well while drilling ranging device is lowered into the upper parallel well after the lower parallel well is completed, and is based on the above-mentioned up-and-down parallel well while drilling ranging device. The present application provides an up-and-down parallel well while drilling ranging method, as shown in Figure 2 the method comprises the following steps:

[0059] Step S101, calculating the three-axis magnetic field standard value of the second fluxgate sensor in the current upper parallel well borehole direction according to the geomagnetic field model, the three-axis magnetic field standard value comprising an X-axis magnetic field standard value, a Y-axis magnetic field standard value and a Z-axis magnetic field standard value;

[0060] Step S102, starting the drill string (such as a bent screw drill string) of the upper parallel well, and after receiving the gravity high side signal of the gravity acceleration sensor, stopping the drill string of the upper parallel well and adjusting the high side direction of the second fluxgate sensor so that the second fluxgate sensor is directly opposite the casing of the lower parallel well;

[0061] Step S103, starting the drill string of the upper parallel well again, and continuously measuring the magnetic field signal of the casing of the lower parallel well through the second fluxgate sensor;

[0062] Step S104, determining the casing direction of the lower parallel well and the spatial magnetic field distance between the upper parallel well and the lower parallel well of each measuring point according to the magnetic field signal and the three-axis magnetic field standard value, the measuring point being the measuring position of the casing of the second fluxgate sensor.

[0063] Specifically, the above and below parallel well while drilling ranging device is lowered into the upper parallel well. In an embodiment, the above and below parallel well while drilling ranging method provided by the present application further comprises: lowering the above and below parallel well while drilling ranging device into the bottom of the upper parallel well when the upper parallel well is drilled to the target point and the inclination angle reaches the preset value. Specifically, for the convenience of operation and more accurate measurement of the magnetic field signal of the casing of the lower parallel well, the above and below parallel well while drilling ranging device is lowered into the bottom of the upper parallel well when the upper parallel well is drilled to the preset target point and the inclination angle reaches the preset value, so that the above and below parallel well while drilling ranging device is in parallel with the casing of the lower parallel well. In an embodiment, the above and below parallel well while drilling ranging method provided by the present application further comprises: testing the above and below parallel well while drilling ranging device before lowering the device into the upper parallel well; and lowering the above and below parallel well while drilling ranging device into the upper parallel well after the testing signal is normal.

[0064] Specifically, the Z-axis magnetic field standard value wherein B is the total standard magnetic field intensity, is the standard geomagnetic inclination, B and is calculated according to the geomagnetic field model (which can be calculated by geomagnetic field model software), is the inclination angle of the upper parallel well, is the hole azimuth angle of the upper parallel well; the X-axis magnetic field standard value wherein f is the high side tool face angle of the upper parallel well; the Y-axis magnetic field standard value Specifically, the three-axis magnetic field standard value can be calculated by a ground computer.

[0065] Specifically, after the downhole ranging device of the upper and lower parallel wells is lowered, the drilling tool (bent-sleeve drilling tool) of the upper parallel well is started, and the starting can be performed by the surface driller control platform controlling the drilling rig top drive power system. After the drilling tool is started, the downhole ranging device of the upper parallel well moves to the preset position following the drilling tool, and then stops rotating, and the drilling tool is static, while the gravity acceleration sensor, the second fluxgate sensor and the MWD in the downhole ranging device of the upper parallel well are in working condition and upload the measurement signals to the surface computer. After the surface computer receives the gravity high-edge signal uploaded by the gravity acceleration sensor, the surface computer controls the surface driller control platform to operate the drilling rig top drive power system to rotate the drill pipe to adjust the angle of the downhole drilling tool, so as to adjust the high-edge direction of the second fluxgate sensor, for example, to make the high-edge angle of the second fluxgate sensor reach 180°, and the main purpose is to make the second fluxgate sensor face the casing of the lower parallel well, that is, to make the part of the second fluxgate sensor receiving the magnetic field signal face the casing of the lower parallel well, so as to more accurately measure the magnetic field signal of the casing.

[0066] Specifically, after the second fluxgate sensor is adjusted, the drilling tool of the upper parallel well is started again, and the starting can be performed by the surface computer, for example, the second fluxgate sensor sends the in-position information to the surface computer after being adjusted to the position, and the surface computer controls the surface driller control platform to start the drilling tool of the upper parallel well after receiving the in-position information. After the drilling tool is started, the downhole ranging device of the upper and lower parallel wells moves to the preset measurement point following the drilling tool, and then the drilling tool is static, and the second fluxgate sensor continuously captures the magnetic field signal of the casing of the lower parallel well. When the upper parallel well and the lower parallel well are close to each other (that is, the drilling trajectory of the upper parallel well is horizontally deviated), the magnetic field values of the three axes of the second fluxgate sensor will abnormally change, and through the abnormal change of the magnetic field values, the direction of the casing (relative to the borehole of the upper parallel well) can be determined.

[0067] Specifically, the second fluxgate sensor uploads the magnetic field signal to the surface computer, and the surface computer determines the high-edge azimuth angle of the casing of the lower parallel well according to the magnetic field signal and the foregoing three-axis magnetic field standard value , wherein, X-axis abnormal magnetic field value, , X-axis actual measurement value of the magnetic field obtained according to the magnetic field signal, X-axis magnetic field standard value, Y-axis abnormal magnetic field value, , Y-axis actual measurement value of the magnetic field obtained according to the magnetic field signal, Y-axis magnetic field standard value; and then determines the direction of the casing according to the high-edge azimuth angle of the casing . Specifically, if is a positive value, it is determined that the direction of the casing is on the right side of the high edge of the borehole of the upper parallel well; and if is a positive value, it is determined that the casing direction is on the right side of the upper parallel wellbore high side; when the casing high side azimuth angle is 0°, the lower parallel wellbore is directly above the upper parallel wellbore; when the casing high side azimuth angle is a positive value, the lower parallel wellbore azimuth angle is greater than the upper parallel wellbore azimuth angle, which defines that the casing direction of the lower parallel wellbore is on the right side of the upper parallel wellbore high side; when the casing high side azimuth angle is a negative value, the lower parallel wellbore azimuth angle is less than the upper parallel wellbore azimuth angle, which defines that the casing direction of the lower parallel wellbore is on the left side of the upper parallel wellbore high side.

[0068] Specifically, after receiving the magnetic field signal uploaded by the second fluxgate sensor, the ground computer further determines the spatial magnetic field distance between the upper parallel wellbore and the lower parallel wellbore according to the magnetic field signal and the three-axis magnetic field standard value , wherein, is the Z-axis abnormal magnetic field value, , is the Z-axis magnetic field actual measurement value obtained according to the magnetic field signal, is the Z-axis magnetic field standard value, is the formation lithology relative permeability, is the drilling fluid relative permeability, is the measurement point relative permeability, is the casing magnetic flux, wherein, , , , are all pre-determined.

[0069] In an embodiment, the up-and-down parallel well drilling and distance measuring method provided in the present application further comprises: controlling the drilling trajectory of the bent-helix drill according to the casing direction and the spatial magnetic field distance.

[0070] Specifically, after obtaining the casing direction and the spatial magnetic field distance, the ground computer can calculate the drilling trajectory of the bent-helix drill according to the casing direction and the spatial magnetic field distance, control the bent-helix drill according to the drilling trajectory, thereby controlling the distance between the up-and-down parallel wells and the azimuth angle of the upper parallel well, and achieving the consistent parallel of the directions of the two wells.

[0071] The application provides a ranging method for drilling upper and lower parallel wells, which only needs to lower a ranging device for drilling upper and lower parallel wells into the upper parallel well, receives a magnetic field signal of the casing of the lower parallel well through a fluxgate sensor of the ranging device for drilling upper and lower parallel wells, continuously starts the ranging device for drilling upper and lower parallel wells to measure the magnetic field of the casing in the drilling process, and obtains the casing direction and the spatial magnetic field distance between the upper and lower parallel wells according to the measurement signal, so as to control the drilling trajectory and realize parallel drilling along the trajectory of the lower parallel well.

[0072] Although the above embodiment describes each step in the above order, those skilled in the art can understand that, in order to achieve the effect of the embodiment, the different steps do not have to be executed in such an order, and can be executed simultaneously (in parallel) or in a reversed order, and these simple changes are within the protection scope of the application.

[0073] The third aspect of the application provides a ranging system for drilling upper and lower parallel wells based on the ranging method for drilling upper and lower parallel wells, which is applied to a ground computer or other electronic devices for drilling calculation and control, such as Figure 3 As shown in the figure, the system comprises:

[0074] A magnetic field standard value calculation module is configured to record the three-axis magnetic field standard values of the second fluxgate sensor when the lower parallel well is not provided with a casing, wherein the three-axis magnetic field standard values comprise an X-axis magnetic field standard value, a Y-axis magnetic field standard value and a Z-axis magnetic field standard value.

[0075] A fluxgate sensor control module is configured to start the drilling tool of the upper parallel well, adjust the high-side direction of the second fluxgate sensor after receiving the high-side signal of the gravity acceleration sensor, so that the second fluxgate sensor faces the casing of the lower parallel well, and stop the drilling tool of the upper parallel well.

[0076] A magnetic field measurement module is configured to start the drilling tool of the upper parallel well again, and continuously measure the magnetic field signal of the casing of the lower parallel well through the second fluxgate sensor.

[0077] A ranging module is configured to determine the casing direction of the lower parallel well and the spatial magnetic field distance between the upper and lower parallel wells at each measurement point according to the magnetic field signal and the three-axis magnetic field standard values, wherein the measurement point is the measurement position of the second fluxgate sensor on the casing.

[0078] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process and related description of the system can be referred to the corresponding process in the foregoing method embodiment, which will not be described herein.

[0079] It should be noted that the above-mentioned embodiments of the parallel up-and-down well while drilling ranging system are only used as examples for the division of the above-mentioned functional modules, and in actual applications, the above-mentioned functions can be completed by different functional modules according to needs, that is, the modules or steps in the embodiments of the present application are further decomposed or combined, for example, the modules of the above-mentioned embodiments can be combined into one module, or can be further split into multiple sub-modules to complete all or part of the above-described functions. The names of the modules and steps involved in the embodiments of the present application are only for distinguishing the respective modules or steps, and are not considered as improper limitations of the present application.

[0080] In a fourth aspect, the present application provides an electronic device, comprising:

[0081] at least one processor; and

[0082] a memory in communication with the at least one processor; wherein

[0083] the memory stores instructions executable by the processor, the instructions being for execution by the processor to implement the above-mentioned parallel up-and-down well while drilling ranging method.

[0084] In a fifth aspect, the present application provides a computer readable storage medium, the computer readable storage medium storing computer instructions, the computer instructions being for execution by the computer to implement the above-mentioned parallel up-and-down well while drilling ranging method.

[0085] In a sixth aspect, the present application provides a computer program product containing instructions, which, when executed by a computer device, cause the computer device to perform the above-mentioned parallel up-and-down well while drilling ranging method.

[0086] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes and related descriptions of the storage device and the processing device described above can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0087] Those skilled in the art should be able to understand that the modules and method steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware, computer software or a combination of both. The programs corresponding to the software modules and method steps can be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. In order to clearly illustrate the interchangeability of electronic hardware and software, the components and steps of each example have been generally described in the above description. Whether the functions are performed in electronic hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0088] Reference is made below to Figure 4 which shows a structural schematic diagram of a computer system of a server for implementing the embodiments of the method, system and device of the present application. Figure 4 The server shown is merely an example and should not impose any limitation on the functions and use range of the embodiments of the present application.

[0089] As Figure 4 shown, the computer system includes a central processing unit (CPU) 401 which can perform various appropriate actions and processes according to programs stored in a read-only memory (ROM) 402 or loaded from a storage portion 408 into a random access memory (RAM) 403. Various programs and data required for system operation are also stored in the RAM 403. The CPU 401, ROM 402 and RAM 403 are connected to each other through a bus 404. An input / output (I / O) interface 405 is also connected to the bus 404.

[0090] The following components are connected to the I / O interface 405: an input section 406 including a keyboard, a mouse, etc.; an output section 407 including a display such as a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 408 including a hard disk, etc.; and a communication section 409 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 409 performs communication processing via a network such as the Internet. A drive 410 is also connected to the I / O interface 405 as necessary. A removable recording medium 411 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc. is attached to the drive 410 as necessary, so that a computer program read out therefrom is installed in the storage section 408 as necessary.

[0091] In particular, the processes described above with reference to the flow charts can be implemented as a computer software program according to embodiments of the present disclosure. For example, embodiments of the present disclosure include a computer program product comprising a computer program carried on a computer readable medium, the computer program comprising program code for performing the methods illustrated by the flow charts. In such embodiments, the computer program can be downloaded and installed from a network via the communication section 409, and / or installed from the removable medium 411. When the computer program is executed by the central processing unit (CPU) 401, the above-described functions defined in the methods of the present application are performed. It should be noted that the computer readable medium of the present application can be a computer readable signal medium or a computer readable storage medium or any combination of the two. The computer readable storage medium may, for example, be, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or any suitable combination of the above. More specific examples of the computer readable storage medium can include, but are not limited to, an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, the computer readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus or device. In the present application, the computer readable signal medium can include a data signal carried in a baseband or as part of a carrier wave, in which the computer readable program code is carried. Such a propagated data signal can take any of a variety of forms, including but not limited to electro-magnetic, optical, or any suitable combination thereof. The computer readable signal medium can also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate or transport a program for use by or in connection with an instruction execution system, apparatus or device. The program code contained on the computer readable medium can be transmitted by any suitable medium, including but not limited to wireless, wire line, optical fiber cable, RF, etc., or any suitable combination of the above.

[0092] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0093] The computer program instructions can also be loaded onto a computer or other programmable information processing apparatus to cause a series of operations to be performed on the computer or other programmable information processing apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable information processing apparatus implement the functions / acts specified in the flowchart and / or block diagram block or blocks.

[0094] The terms "first", "second", etc. are used to distinguish between similar objects, and are not used to describe or indicate a particular order or sequence.

[0095] The terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0096] The technical scheme of the present application has been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical schemes after the changes or replacements will all fall within the protection scope of the present application.

Claims

1. A down-the-hole ranging device for parallel wells, characterized in that, The device is applied to an upper parallel well, and the device comprises: a non-magnetic drill pipe; a non-magnetic upper end short section, one end of the non-magnetic upper end short section being connected with the non-magnetic drill pipe; a magnetic ranging assembly while drilling, the other end of the non-magnetic upper end short section being connected with one end of a housing of the magnetic ranging assembly while drilling, the housing forming an internal space, the magnetic ranging assembly while drilling further comprising a gravity acceleration sensor, a measurement-while-drilling instrument and a first fluxgate sensor arranged in the internal space; a second fluxgate sensor arranged on a side of the housing away from the internal space; a non-magnetic lower end short section, one end of the non-magnetic lower end short section being connected with the other end of the housing away from the non-magnetic upper end short section, the other end of the non-magnetic lower end short section being connected with a drilling tool.

2. The up-and-down parallel well distance-while-drilling device according to claim 1, wherein, The upper end non-magnetic short section and the lower end non-magnetic short section are used to shield the axial magnetism of the drilling tool, the position of the first fluxgate sensor is a node, the direction from the node to the upper end non-magnetic short section is a first direction, the direction from the node to the lower end non-magnetic short section is a second direction, the length of the upper end non-magnetic short section satisfies that the first drilling tool axial interference magnetic field intensity value in the first direction tends to zero, the length of the lower end non-magnetic short section satisfies that the second drilling tool axial interference magnetic field intensity value in the second direction tends to zero, the first drilling tool axial interference magnetic field intensity value in the first direction is , the second drilling tool axial interference magnetic field intensity value in the second direction is , the length of the upper end non-magnetic short section is , the length of the lower end non-magnetic short section is 3. A method for ranging while drilling in parallel wells, characterized in that, The method is based on the magnetic ranging device while drilling for upper and lower parallel wells according to claim 1 or 2, and the method comprises: calculating a three-axis magnetic field standard value of the second fluxgate sensor at a current upper parallel well borehole azimuth according to a geomagnetic field model, the three-axis magnetic field standard value comprising an X-axis magnetic field standard value, a Y-axis magnetic field standard value and a Z-axis magnetic field standard value; starting the drilling tool of the upper parallel well, stopping the drilling tool of the upper parallel well after receiving a gravity high-edge signal of the gravity acceleration sensor, and adjusting a high-edge direction of the second fluxgate sensor so that the second fluxgate sensor faces the casing of the lower parallel well; starting the drilling tool of the upper parallel well again, continuously measuring a magnetic field signal of the casing of the lower parallel well through the second fluxgate sensor, and determining a casing direction of the lower parallel well at each measurement point and a spatial magnetic field distance between the upper parallel well and the lower parallel well according to the magnetic field signal and the three-axis magnetic field standard value, the measurement point being a measurement position of the second fluxgate sensor on the casing.

4. The magnetic ranging method while drilling for upper and lower parallel wells according to claim 3, wherein The Z-axis magnetic field standard value wherein B is a standard magnetic field total intensity, is a standard magnetic inclination, B and is calculated according to a geomagnetic field model, is a hole inclination of the upper parallel well, is a hole azimuth angle of the upper parallel well; The X-axis magnetic field standard value wherein f is a high side tool face angle of the upper parallel well The Y-axis magnetic field standard value .

5. The method of claim 3, wherein, the determination of the casing direction of the lower parallel well at each measurement point according to the magnetic field signal and the three-axis magnetic field standard value comprises: determining a casing high side azimuth of the lower parallel well wherein, is an X-axis abnormal magnetic field value, , is an X-axis magnetic field actual measurement value obtained from the magnetic field signal, is an X-axis magnetic field standard value, is a Y-axis abnormal magnetic field value, , is a Y-axis magnetic field actual measurement value obtained from the magnetic field signal, is a Y-axis magnetic field standard value; According to the azimuth angle of the upper side of the sleeve Determine the direction of the sleeve.

6. The method of claim 5, wherein, said casing high side azimuth determining said casing direction comprises If is positive, it is determined that the casing direction is on the right side of the wellbore high side of the upper parallel well; If is negative, it is determined that the casing direction is on the left side of the borehole high side of the upper parallel well; wherein, with the hole axis azimuth of the upper parallel well as the reference, the casing high side azimuth is 0°, the lower parallel well is directly above the hole of the upper parallel well, when the casing high side azimuth is positive, the hole azimuth of the lower parallel well is greater than the hole azimuth of the upper parallel well, which is defined as the casing direction of the lower parallel well is on the right side of the hole high side of the upper parallel well; when the casing high side azimuth is negative, the hole azimuth of the lower parallel well is less than the hole azimuth of the upper parallel well, which is defined as the casing direction of the lower parallel well is on the left side of the hole high side of the upper parallel well.

7. The method of claim 3 to 6, wherein, the determination of the spatial magnetic field distance between the upper parallel well and the lower parallel well according to the magnetic field signal and the three-axis magnetic field standard value comprises: calculating the spatial magnetic field distance wherein, is a Z-axis abnormal magnetic field value, , is a Z-axis magnetic field actual measurement value obtained according to the magnetic field signal, is a Z-axis magnetic field standard value, is a formation lithology relative permeability, is a drilling fluid relative permeability, is a measurement point relative permeability, is a casing magnetic flux.

8. The method of claim 3, wherein, before starting the drilling tool of the upper parallel well and receiving the gravity high-edge signal of the gravity acceleration sensor, the method further comprises: when the upper parallel well is drilled to a target point and a well inclination angle reaches a preset value, placing the magnetic ranging device while drilling for upper and lower parallel wells into a bottom of the upper parallel well in the upper parallel well.

9. A system for ranging while drilling in parallel wells, characterized in that The system is based on the magnetic ranging method while drilling for upper and lower parallel wells according to any one of claims 3 to 7, and the system comprises: a magnetic field standard value calculation module for recording a three-axis magnetic field standard value of the second fluxgate sensor when the lower parallel well is not placed with a casing, the three-axis magnetic field standard value comprising an X-axis magnetic field standard value, a Y-axis magnetic field standard value and a Z-axis magnetic field standard value; a fluxgate sensor control module for starting the drilling tool of the upper parallel well, adjusting a high-edge direction of the second fluxgate sensor so that the second fluxgate sensor faces the casing of the lower parallel well after receiving a gravity high-edge signal of the gravity acceleration sensor, and stopping the drilling tool of the upper parallel well. a magnetic field measuring module for measuring the magnetic field signal of the casing of the lower parallel well through the second fluxgate sensor when the drilling tool of the upper parallel well is turned on again; a ranging module for determining the casing direction of the lower parallel well at each measuring point and the spatial magnetic field distance between the upper parallel well and the lower parallel well according to the magnetic field signal and the three-axis magnetic field standard value, the measuring point being the measuring position of the second fluxgate sensor on the casing.

10. An electronic device, comprising: comprising: at least one processor; and a memory in communication with the at least one processor; wherein the memory stores instructions executable by the processor, the instructions being for execution by the processor to implement the ranging method while drilling for the upper and lower parallel wells according to any one of claims 3 to 7.

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