High-precision azimuth gamma passive test method and application

Abstract

The invention discloses a high-precision azimuth gamma passive test method and application, and belongs to the field of oil and gas logging equipment, and the test method comprises the steps: a, enabling a laser to correspond to a preset tool face angle position through rotating a rotating disc of a test device; b, a motor driver drives a rotary table motor to rotate, and a rotary table is driven to rotate; c, monitoring data of the azimuth gamma instrument to be measured through the PC, and comparing the data with the mounting position of the tool surface where the laser is located to obtain an evaluation result; and step d, the step a to the step c are cycled until all the preset tool face angle positions are tested. According to the invention, an accurate tool face angle reference is provided through the laser, the rotating turntable with controllable rotating speed is utilized to drive the to-be-detected azimuth gamma instrument to rotate, and the PC automatically acquires data and compares the data with the reference, so that the azimuth measurement performance of the to-be-detected azimuth gamma instrument is efficiently, accurately and automatically detected, and the method has good applicability.

Description

Technical Field

[0001] This invention relates to the field of oil and gas logging equipment technology, and in particular to a high-precision passive azimuth gamma testing method and its application. Background Technology

[0002] In directional drilling and geosteering processes in oil and gas fields, azimuth gamma-ray instruments are one of the core pieces of equipment in modern logging-while-drilling systems. Conventional azimuth gamma-ray instruments effectively determine the spatial location of the wellbore relative to the reservoir by measuring the azimuthal differences in the intensity of natural gamma rays in the formation. For example, whether it is located at the top or bottom of the reservoir, thus achieving basic geosteering.

[0003] As the precision requirements for exploration and development continue to increase, the value of high-precision azimuth gamma instruments is becoming increasingly prominent. Conventional azimuth gamma instruments can distinguish whether the wellbore is at the top or bottom of the reservoir based on measurement parameters, while high-precision azimuth gamma instruments can further calculate the reservoir dip angle and reservoir thickness, thus providing a more accurate basis for adjusting the wellbore trajectory and improving the reservoir encounter rate.

[0004] When testing azimuth gamma instruments, they are typically mounted on a rotating stage, with the gamma source placed in different positions to collect azimuth gamma measurement data over a longer period to assess the instrument's operational status. However, due to the floating characteristics of the gamma source and sensor, the signal-to-noise ratio of the measurement data is low, necessitating a rough statistical averaging based on long-term data accumulation, resulting in low testing efficiency and accuracy.

[0005] Chinese patent application CN114924309A, published on August 19, 2022, discloses a rotating testing device for azimuth gamma-ray imaging while drilling (WASEM). The device comprises a chassis mechanism, a drive mechanism, a rotating support mechanism, and a measuring mechanism. The rotating support mechanism is mounted on the chassis mechanism and supports the WASEM azimuth gamma-ray imaging device. The drive mechanism drives the WASEM azimuth gamma-ray imaging device to rotate on the rotating support mechanism. The measuring mechanism is mounted on the chassis mechanism and is fitted onto the outer ring of the WASEM azimuth gamma-ray imaging device. The circumference of the measuring mechanism... Multiple quadrant regions are provided in the direction, and gamma radiation sources are provided in the quadrant regions.

[0006] The patent application discloses a rotating azimuth gamma-ray imaging (AWAI) testing device that can simulate a formation model near the drill bit during drilling. The drive mechanism rotates the AWAI on a support mechanism, simulating the effectiveness of AWAI scanning the formation during continuous rotation of the downhole drilling tool. The measurement mechanism has multiple quadrant regions along its circumference. It measures gamma data within the corresponding quadrant to test the azimuth gamma measurement function of drilling imaging, verifying its measurement capabilities, stability, and reliability. However, it cannot efficiently and accurately perform automated verification of the azimuth measurement performance of the azimuth gamma instrument, resulting in limited applicability. Summary of the Invention

[0007] To overcome the shortcomings of the prior art, this invention provides a high-precision passive azimuth gamma testing method and application. This invention provides a precise tool surface angle reference through a laser, and uses a controllable rotation speed rotary table to drive the azimuth gamma instrument under test to rotate. The PC automatically collects data and compares it with the reference, thereby realizing efficient, accurate and automated verification of the azimuth measurement performance of the azimuth gamma instrument under test, and has good applicability.

[0008] This invention is achieved through the following technical solution: A high-precision passive azimuth gamma testing method includes the following steps: Step a: By rotating the rotating disk of the testing device, the laser is positioned to correspond to the preset tool surface angle. Step b: Set the rotation speed of the rotary table using the speed controller, start the rotary table motor, and drive the rotary table motor to rotate using the motor driver, thereby rotating the rotary table. Step c: Monitor the data of the gamma instrument at the location to be tested using a PC, and obtain the evaluation result by comparing it with the installation position of the laser on the tool face; Step d, repeat steps a-c until all predetermined tool face angle positions have been tested.

[0009] In step a, making the laser correspond to the preset tool surface angle position means observing and rotating the rotating disk to align the light emitted by the laser with the preset angle scale value on the scale.

[0010] In step b, setting the rotation speed of the rotary table via the speed controller means sending the speed value set by the speed controller to the motor driver, and the motor driver controls the rotary table motor to rotate at the set speed.

[0011] In step b, the rotational speed of the turntable is in the range of 30-300 revolutions per minute.

[0012] In step c, comparing the tool face installation position of the laser means that the PC receives the tool face angle measurement data reported by the gamma instrument of the direction to be measured, compares the tool face angle measurement data with the tool face reference angle indicated by the laser, calculates the deviation value between the tool face angle measurement data and the tool face reference angle, and determines whether the deviation value exceeds the allowable error range.

[0013] In step c, the data monitored by the PC for the gamma instrument under test refers to the PC receiving and displaying the count of analog gamma pulses generated by the gamma instrument under test during its rotation.

[0014] In step d, the predetermined tool surface angle position refers to multiple test points selected at equal angular intervals.

[0015] The equal angle intervals are 15 degrees, 30 degrees, or 45 degrees.

[0016] The PC has a built-in automatic data analysis module, which is used to automatically record the measurement data at each tool face angle position, calculate the deviation value, determine whether it is qualified, and generate a test report.

[0017] The laser emits a visible laser beam, and the center of the visible laser beam is used to align with the scale on the dial.

[0018] In step a, the testing device includes a PC, a gamma ray instrument for the azimuth under test, a rotary table, a rotary table motor, a motor driver, a speed controller, a conductive slip ring, and a regulated power supply. A rotating disk is fitted over the rotary table, with a gap between the rotating disk and the rotary table. A laser is fixedly connected to the rotating disk, and a scale is fixedly connected to the outer circumference of the rotating disk. One end of the rotary table is connected to the rotary table motor, and the other end is connected to the conductive slip ring. The conductive slip ring is electrically connected to the gamma ray instrument for the azimuth under test mounted on the rotary table. The gamma ray instrument for the azimuth under test is electrically connected to both the regulated power supply and the PC. The speed controller is electrically connected to the motor driver, and the motor driver is connected to the rotary table motor. A photoelectric sensor is fixedly connected to the rotary table, and the photoelectric sensor is electrically connected to the gamma ray instrument for the azimuth under test.

[0019] The azimuth gamma measuring instrument and the rotating turntable are fixedly connected, and the central axis of the azimuth gamma measuring instrument is coaxial with the rotation axis of the rotating turntable.

[0020] Both the rotary table and the rotating disk are made of non-shielded materials.

[0021] In step d, the tool face angle position test sequence is monotonically increasing according to the angle value.

[0022] The motor driver uploads the real-time monitoring information of the rotary table motor to the PC for display and recording.

[0023] An application of high-precision passive azimuth gamma testing, suitable for testing azimuth gamma instruments with fluxgate sensors for tool face calculation.

[0024] An application of high-precision passive azimuth gamma testing is provided, which is suitable for establishing a tool face angle measurement error model for azimuth gamma instruments. The tool face angle measurement error model is constructed based on the deviation values ​​obtained from multiple tool face angle position tests.

[0025] An application of high-precision azimuth gamma passive testing is available for evaluating the tool face response performance of azimuth gamma instruments in simulated real downhole passive environments.

[0026] The beneficial effects of this invention are mainly reflected in the following aspects: 1. This invention comprises the following steps: Step a) Rotating the rotating disk of the testing device to align the laser with a preset tool face angle position; Step b) Setting the rotation speed of the rotating table using a speed control device, starting the rotating table motor, and driving the rotating table motor to rotate via a motor driver; Step c) Monitoring the data of the gamma instrument under test using a PC, and comparing it with the tool face installation position of the laser to obtain an evaluation result; Step d) Repeating steps a-c until all predetermined tool face angle positions have been tested. Compared with existing technologies, this invention provides a precise tool face angle reference using a laser, and uses a controllable rotation speed rotating table to drive the rotation of the gamma instrument under test. The PC automatically collects data and compares it with the reference, thereby achieving efficient, accurate, and automated verification of the azimuth measurement performance of the gamma instrument under test, and has good applicability. 2. In step d of this invention, the predetermined tool surface angle position refers to multiple test points selected at equal angular intervals. By selecting test points at equal angular intervals, the comprehensiveness and completeness of the orientation measurement performance of the gamma instrument under test are ensured within the full circumference range, thus avoiding test blind spots.

[0027] 3. The present invention uses equal angular intervals of 15 degrees, 30 degrees or 45 degrees, which can comprehensively evaluate the performance of the gamma instrument under test at different tool face angles, and control the total test time, thus achieving a balance between test comprehensiveness and test efficiency.

[0028] 4. In this invention, the PC has a built-in automatic data analysis module. The automatic data analysis module is used to automatically record the measurement data at each tool face angle position, calculate the deviation value, determine whether it is qualified, and generate a test report. By automating the data processing, errors that may occur in manual recording and calculation are avoided, greatly improving the testing efficiency and providing evaluation results quickly and objectively, ensuring the standardization and traceability of the test.

[0029] 5. In this invention, the light emitted by the laser is a visible laser beam, and the center of the visible laser spot is used to align with the scale of the dial. Using a visible laser makes the angle alignment operation intuitive and convenient. Alignment by the center of the spot reduces the operation error in the alignment process and improves the convenience and accuracy of the reference setting.

[0030] 6. The present invention includes a testing device comprising a PC, a gamma ray instrument for the azimuth to be measured, a rotary table, a rotary table motor, a motor driver, a speed controller, a conductive slip ring, and a regulated power supply. A rotating disk is fitted over the rotary table, with a gap between the rotating disk and the rotary table. A laser is fixedly connected to the rotating disk, and a scale is fixedly connected to the outer circumference of the rotating disk. One end of the rotary table is connected to the rotary table motor, and the other end of the rotary table is connected to the conductive slip ring. The conductive slip ring is electrically connected to the gamma ray instrument for the azimuth to be measured, which is mounted on the rotary table. The gamma ray instrument for the azimuth to be measured is respectively connected to... The regulated power supply is electrically connected to the PC, the speed controller is electrically connected to the motor driver, the motor driver is connected to the rotary table motor, a photoelectric sensor is fixedly connected to the rotary table, and the photoelectric sensor is electrically connected to the gamma instrument under test. A high-precision tool face angle reference is provided by an integrated laser and a dial. The rotary table is used to simulate the dynamic rotation of the gamma instrument under test. Combined with the conductive slip ring and the photoelectric sensor, real-time, accurate acquisition and automated comparison and evaluation of the tool face measurement data of the gamma instrument under test are realized under stable power supply and signal transmission.

[0031] 7. In this invention, the azimuth gamma measuring instrument and the rotating turntable are fixedly connected, and the central axis of the azimuth gamma measuring instrument is coaxial with the rotation axis of the rotating turntable. This reduces the tool face angle measurement error caused by installation eccentricity from the source, and improves the system accuracy and reliability of the test results.

[0032] 8. In this invention, both the rotating turntable and the rotating disk are made of unshielded materials, which can ensure that the gamma instrument under test can receive real natural gamma radiation during the test, making the passive test results more consistent with the actual working conditions.

[0033] 9. In this invention, the test sequence for the tool face angle position is monotonically increasing according to the angle value. By specifying the test sequence, the operation process is optimized, the number of repeated adjustments of the rotary table is reduced, the test efficiency is improved, and the operational errors that may be introduced due to disordered adjustments are reduced.

[0034] 10. In this invention, the motor driver uploads the real-time monitored actual speed information of the rotary table motor to a PC for display and recording. This enables centralized monitoring and recording of speed information, providing data evidence of speed stability for the testing process. If any abnormality occurs in the test results, the speed conditions can be traced back for verification, enhancing the credibility and analyzability of the test results.

[0035] 11. This invention is applicable to establishing a tool face angle measurement error model for an azimuth gamma instrument. The tool face angle measurement error model is constructed based on the deviation values ​​obtained from multiple tool face angle position tests. The error data obtained through testing can be used to construct the error model. The error model can be used to perform software compensation on field measurement data to improve accuracy, and can also be used to guide the improvement of instrument hardware design. Attached Figure Description

[0036] The present invention will now be further described in detail with reference to the accompanying drawings and specific embodiments: Figure 1 This is a flowchart of the present invention; Figure 2 This is a schematic diagram of the structure of the testing device of the present invention; The markings in the diagram are: 1. Rotary disk; 2. Scale disk; 3. Laser; 4. Photoelectric sensor; 5. Rotary stage motor; 6. Motor driver; 7. Speed ​​controller; 8. Gamma instrument for the measured orientation; 9. Conductive slip ring; 10. Regulated power supply; 11. PC; 12. Rotary stage. Detailed Implementation

[0037] Example 1 See Figure 1 A high-precision passive azimuth gamma test method includes the following steps: Step a: By rotating the rotating disk 1 of the testing device, the laser 3 is positioned to correspond to the preset tool surface angle. Step b: Set the rotation speed of the rotary table 12 using the speed controller 7, start the rotary table motor 5, and drive the rotary table motor 5 to rotate through the motor driver 6, thereby rotating the rotary table 12. Step c: Monitor the data of the gamma instrument 8 at the target location using PC 11, and obtain the evaluation result by comparing it with the tool surface installation position of the laser 3; Step d, repeat steps a-c until all predetermined tool face angle positions have been tested.

[0038] This embodiment is the most basic implementation method. Step a: Rotate the rotating disk 1 of the testing device to make the laser 3 correspond to the preset tool surface angle position; Step b: Set the rotation speed of the rotating table 12 through the speed operator 7, start the rotating table motor 5, and drive the rotating table motor 5 to rotate through the motor driver 6, thereby driving the rotating table 12 to rotate; Step c: Monitor the data of the gamma instrument 8 under test through the PC 11, and obtain the evaluation result by comparing it with the tool surface installation position of the laser 3; Step d: Repeat steps a-c until all the predetermined tool surface angle positions have been tested. Compared with the prior art, the laser 3 provides a precise tool surface angle reference, and the rotating table 12 with controllable speed drives the gamma instrument 8 under test to rotate. The PC 11 automatically collects data and compares it with the reference, thereby realizing efficient, accurate and automated verification of the azimuth measurement performance of the gamma instrument 8 under test, which has good applicability. Example 2 See Figure 1 A high-precision passive azimuth gamma test method includes the following steps: Step a: By rotating the rotating disk 1 of the testing device, the laser 3 is positioned to correspond to the preset tool surface angle. Step b: Set the rotation speed of the rotary table 12 using the speed controller 7, start the rotary table motor 5, and drive the rotary table motor 5 to rotate through the motor driver 6, thereby rotating the rotary table 12. Step c: Monitor the data of the gamma instrument 8 at the target location using PC 11, and obtain the evaluation result by comparing it with the tool surface installation position of the laser 3; Step d, repeat steps a-c until all predetermined tool face angle positions have been tested.

[0039] Preferably, in step a, making the laser 3 correspond to the preset tool surface angle position means observing and rotating the rotating disk 1 to make the light emitted by the laser 3 align with the preset angle scale value on the scale disk 2.

[0040] In step b, setting the rotation speed of the rotary table 12 by the speed operator 7 means sending the speed value set by the speed operator 7 to the motor driver 6, and the motor driver 6 controls the rotary table motor 5 to rotate at the set speed.

[0041] In step b, the rotational speed of the rotary table 12 is 30 revolutions per minute.

[0042] In step c, comparing the tool face installation position of the laser 3 means that the PC 11 receives the tool face angle measurement data reported by the gamma instrument 8 of the direction to be measured, compares the tool face angle measurement data with the tool face reference angle indicated by the laser 3, calculates the deviation value between the tool face angle measurement data and the tool face reference angle, and determines whether the deviation value exceeds the allowable error range.

[0043] In step c, the data monitored by the PC 11 for the gamma instrument 8 under test refers to the PC 11 receiving and displaying the count of analog gamma pulses generated by the gamma instrument 8 under test during its rotation.

[0044] In step d, the predetermined tool surface angle position refers to multiple test points selected at equal angular intervals.

[0045] This embodiment is a preferred implementation. In step d, the predetermined tool surface angle position refers to multiple test points selected at equal angular intervals. By selecting test points at equal angular intervals, the comprehensiveness and completeness of the 8-directional measurement performance of the gamma instrument under test are ensured within the full circumference range, avoiding test blind spots.

[0046] Example 3 See Figure 1 A high-precision passive azimuth gamma test method includes the following steps: Step a: By rotating the rotating disk 1 of the testing device, the laser 3 is positioned to correspond to the preset tool surface angle. Step b: Set the rotation speed of the rotary table 12 using the speed controller 7, start the rotary table motor 5, and drive the rotary table motor 5 to rotate through the motor driver 6, thereby rotating the rotary table 12. Step c: Monitor the data of the gamma instrument 8 at the target location using PC 11, and obtain the evaluation result by comparing it with the tool surface installation position of the laser 3; Step d, repeat steps a-c until all predetermined tool face angle positions have been tested.

[0047] In step a, making the laser 3 correspond to the preset tool surface angle position means observing and rotating the rotating disk 1 to make the light emitted by the laser 3 align with the preset angle scale value on the scale disk 2.

[0048] In step b, setting the rotation speed of the rotary table 12 by the speed operator 7 means sending the speed value set by the speed operator 7 to the motor driver 6, and the motor driver 6 controls the rotary table motor 5 to rotate at the set speed.

[0049] In step b, the rotational speed of the rotary table 12 is 300 revolutions per minute.

[0050] In step c, comparing the tool face installation position of the laser 3 means that the PC 11 receives the tool face angle measurement data reported by the gamma instrument 8 of the direction to be measured, compares the tool face angle measurement data with the tool face reference angle indicated by the laser 3, calculates the deviation value between the tool face angle measurement data and the tool face reference angle, and determines whether the deviation value exceeds the allowable error range.

[0051] In step c, the data monitored by the PC 11 for the gamma instrument 8 under test refers to the PC 11 receiving and displaying the count of analog gamma pulses generated by the gamma instrument 8 under test during its rotation.

[0052] In step d, the predetermined tool surface angle position refers to multiple test points selected at equal angular intervals.

[0053] The equal angular interval is 15 degrees.

[0054] The PC 11 has a built-in automatic data analysis module, which is used to automatically record the measurement data at each tool face angle position, calculate the deviation value, determine whether it is qualified, and generate a test report.

[0055] This embodiment is another preferred implementation. The PC 11 has a built-in automatic data analysis module. The automatic data analysis module is used to automatically record the measurement data at each tool face angle position, calculate the deviation value, determine whether it is qualified, and generate a test report. By automating the data processing, errors that may occur in manual recording and calculation are avoided, greatly improving the testing efficiency, and providing evaluation results quickly and objectively, ensuring the standardization and traceability of the test.

[0056] Example 4 See Figure 1 A high-precision passive azimuth gamma test method includes the following steps: Step a: By rotating the rotating disk 1 of the testing device, the laser 3 is positioned to correspond to the preset tool surface angle. Step b: Set the rotation speed of the rotary table 12 using the speed controller 7, start the rotary table motor 5, and drive the rotary table motor 5 to rotate through the motor driver 6, thereby rotating the rotary table 12. Step c: Monitor the data of the gamma instrument 8 at the target location using PC 11, and obtain the evaluation result by comparing it with the tool surface installation position of the laser 3; Step d, repeat steps a-c until all predetermined tool face angle positions have been tested.

[0057] In step a, making the laser 3 correspond to the preset tool surface angle position means observing and rotating the rotating disk 1 to make the light emitted by the laser 3 align with the preset angle scale value on the scale disk 2.

[0058] In step b, setting the rotation speed of the rotary table 12 by the speed operator 7 means sending the speed value set by the speed operator 7 to the motor driver 6, and the motor driver 6 controls the rotary table motor 5 to rotate at the set speed.

[0059] In step b, the rotational speed of the rotary table 12 is 200 revolutions per minute.

[0060] In step c, comparing the tool face installation position of the laser 3 means that the PC 11 receives the tool face angle measurement data reported by the gamma instrument 8 of the direction to be measured, compares the tool face angle measurement data with the tool face reference angle indicated by the laser 3, calculates the deviation value between the tool face angle measurement data and the tool face reference angle, and determines whether the deviation value exceeds the allowable error range.

[0061] In step c, the data monitored by the PC 11 for the gamma instrument 8 under test refers to the PC 11 receiving and displaying the count of analog gamma pulses generated by the gamma instrument 8 under test during its rotation.

[0062] In step d, the predetermined tool surface angle position refers to multiple test points selected at equal angular intervals.

[0063] The equal angular interval is 30 degrees.

[0064] The PC 11 has a built-in automatic data analysis module, which is used to automatically record the measurement data at each tool face angle position, calculate the deviation value, determine whether it is qualified, and generate a test report.

[0065] The light emitted by the laser 3 is a visible laser beam, and the center of the visible laser spot is used to align with the scale of the dial 2.

[0066] More preferably, in step a, the testing device includes a PC 11, a gamma ray instrument 8 for the target orientation, a rotary table 12, a rotary table motor 5, a motor driver 6, a speed controller 7, a conductive slip ring 9, and a regulated power supply 10. A rotating disk 1 is fitted over the rotary table 12, with a gap between the rotating disk 1 and the rotary table 12. A laser 3 is fixedly connected to the rotating disk 1, and a scale 2 is fixedly connected to the outer circumference of the rotating disk 1. One end of the rotary table 12 is connected to the rotary table motor 5, and the other end of the rotary table 12 is connected to the conductive slip ring 9. The conductive slip ring 9 is electrically connected to the gamma ray instrument 8 for the target orientation, which is mounted on the rotary table 12. The gamma ray instrument 8 for the target orientation is electrically connected to the regulated power supply 10 and the PC 11, respectively. The speed controller 7 is electrically connected to the motor driver 6, and the motor driver 6 is connected to the rotary table motor 5. A photoelectric sensor 4 is fixedly connected to the rotary table 12, and the photoelectric sensor 4 is electrically connected to the gamma ray instrument 8 for the target orientation.

[0067] This embodiment is another preferred implementation. The light emitted by the laser 3 is a visible laser beam. The center of the visible laser spot is used to align with the scale of the dial 2. Using a visible laser makes the angle alignment operation intuitive and convenient. Alignment by the center of the spot reduces the operation error in the alignment process and improves the convenience and accuracy of the reference setting.

[0068] The testing device includes a PC 11, a gamma ray instrument under test 8, a rotary table 12, a rotary table motor 5, a motor driver 6, a speed controller 7, a conductive slip ring 9, and a regulated power supply 10. A rotating disk 1 is fitted over the rotary table 12, with a gap between the rotating disk 1 and the rotary table 12. A laser 3 is fixedly connected to the rotating disk 1, and a scale 2 is fixedly connected to the outer circumference of the rotating disk 1. One end of the rotary table 12 is connected to the rotary table motor 5, and the other end is connected to the conductive slip ring 9. The conductive slip ring 9 is electrically connected to the gamma ray instrument under test 8 mounted on the rotary table 12. The device is electrically connected to the regulated power supply 10 and the PC 11 respectively. The speed controller 7 is electrically connected to the motor driver 6, and the motor driver 6 is connected to the rotary table motor 5. A photoelectric sensor 4 is fixedly connected on the rotary table 12. The photoelectric sensor 4 is electrically connected to the gamma instrument 8 under test. A high-precision tool surface angle reference is provided by the integrated laser 3 and the scale 2. The rotary table 12 is used to simulate the dynamic rotation of the gamma instrument 8 under test. Combined with the conductive slip ring 9 and the photoelectric sensor 4, the real-time, accurate acquisition and automated comparison and evaluation of the tool surface measurement data of the gamma instrument 8 under test are realized under stable power supply and signal transmission.

[0069] Example 5 See Figure 1 A high-precision passive azimuth gamma test method includes the following steps: Step a: By rotating the rotating disk 1 of the testing device, the laser 3 is positioned to correspond to the preset tool surface angle. Step b: Set the rotation speed of the rotary table 12 using the speed controller 7, start the rotary table motor 5, and drive the rotary table motor 5 to rotate through the motor driver 6, thereby rotating the rotary table 12. Step c: Monitor the data of the gamma instrument 8 at the target location using PC 11, and obtain the evaluation result by comparing it with the tool surface installation position of the laser 3; Step d, repeat steps a-c until all predetermined tool face angle positions have been tested.

[0070] In step a, making the laser 3 correspond to the preset tool surface angle position means observing and rotating the rotating disk 1 to make the light emitted by the laser 3 align with the preset angle scale value on the scale disk 2.

[0071] In step b, setting the rotation speed of the rotary table 12 by the speed operator 7 means sending the speed value set by the speed operator 7 to the motor driver 6, and the motor driver 6 controls the rotary table motor 5 to rotate at the set speed.

[0072] In step b, the rotational speed of the rotary table 12 is 300 revolutions per minute.

[0073] In step c, comparing the tool face installation position of the laser 3 means that the PC 11 receives the tool face angle measurement data reported by the gamma instrument 8 of the direction to be measured, compares the tool face angle measurement data with the tool face reference angle indicated by the laser 3, calculates the deviation value between the tool face angle measurement data and the tool face reference angle, and determines whether the deviation value exceeds the allowable error range.

[0074] In step c, the data monitored by the PC 11 for the gamma instrument 8 under test refers to the PC 11 receiving and displaying the count of analog gamma pulses generated by the gamma instrument 8 under test during its rotation.

[0075] In step d, the predetermined tool surface angle position refers to multiple test points selected at equal angular intervals.

[0076] The equal angular interval is 45 degrees.

[0077] The PC 11 has a built-in automatic data analysis module, which is used to automatically record the measurement data at each tool face angle position, calculate the deviation value, determine whether it is qualified, and generate a test report.

[0078] The light emitted by the laser 3 is a visible laser beam, and the center of the visible laser spot is used to align with the scale of the dial 2.

[0079] In step a, the testing device includes a PC 11, a gamma ray instrument 8 to be tested, a rotary table 12, a rotary table motor 5, a motor driver 6, a speed controller 7, a conductive slip ring 9, and a regulated power supply 10. A rotating disk 1 is fitted over the rotary table 12, with a gap between the rotating disk 1 and the rotary table 12. A laser 3 is fixedly connected to the rotating disk 1, and a scale 2 is fixedly connected to the outer circumference of the rotating disk 1. One end of the rotary table 12 is connected to the rotary table motor 5, and the other end of the rotary table 12 is connected to the conductive slip ring 9. The conductive slip ring 9 is electrically connected to the gamma ray instrument 8 to be tested, which is mounted on the rotary table 12. The gamma ray instrument 8 to be tested is electrically connected to the regulated power supply 10 and the PC 11. The speed controller 7 is electrically connected to the motor driver 6, which is connected to the rotary table motor 5. A photoelectric sensor 4 is fixedly connected to the rotary table 12, and the photoelectric sensor 4 is electrically connected to the gamma ray instrument 8 to be tested.

[0080] The azimuth gamma measuring instrument and the rotating turntable 12 are fixedly connected, and the central axis of the azimuth gamma measuring instrument is coaxial with the rotation axis of the rotating turntable 12.

[0081] Both the rotary table 12 and the rotating disk 1 are made of non-shielded materials.

[0082] This embodiment is another preferred implementation. The azimuth gamma measuring instrument and the rotating stage 12 are fixedly connected. The central axis of the azimuth gamma measuring instrument is coaxial with the rotation axis of the rotating stage 12. This can reduce the tool face angle measurement error caused by installation eccentricity from the source, and improve the system accuracy and reliability of the test results.

[0083] Both the rotating turntable 12 and the rotating disk 1 are made of unshielded materials, which can ensure that the gamma instrument 8 under test can receive real natural gamma radiation during the test, making the passive test results more consistent with the actual working conditions.

[0084] Example 6 See Figure 1 A high-precision passive azimuth gamma test method includes the following steps: Step a: By rotating the rotating disk 1 of the testing device, the laser 3 is positioned to correspond to the preset tool surface angle. Step b: Set the rotation speed of the rotary table 12 using the speed controller 7, start the rotary table motor 5, and drive the rotary table motor 5 to rotate through the motor driver 6, thereby rotating the rotary table 12. Step c: Monitor the data of the gamma instrument 8 at the target location using PC 11, and obtain the evaluation result by comparing it with the tool surface installation position of the laser 3; Step d, repeat steps a-c until all predetermined tool face angle positions have been tested.

[0085] In step a, making the laser 3 correspond to the preset tool surface angle position means observing and rotating the rotating disk 1 to make the light emitted by the laser 3 align with the preset angle scale value on the scale disk 2.

[0086] In step b, setting the rotation speed of the rotary table 12 by the speed operator 7 means sending the speed value set by the speed operator 7 to the motor driver 6, and the motor driver 6 controls the rotary table motor 5 to rotate at the set speed.

[0087] In step b, the rotational speed of the rotary table 12 is 300 revolutions per minute.

[0088] In step c, comparing the tool face installation position of the laser 3 means that the PC 11 receives the tool face angle measurement data reported by the gamma instrument 8 of the direction to be measured, compares the tool face angle measurement data with the tool face reference angle indicated by the laser 3, calculates the deviation value between the tool face angle measurement data and the tool face reference angle, and determines whether the deviation value exceeds the allowable error range.

[0089] In step c, the data monitored by the PC 11 for the gamma instrument 8 under test refers to the PC 11 receiving and displaying the count of analog gamma pulses generated by the gamma instrument 8 under test during its rotation.

[0090] In step d, the predetermined tool surface angle position refers to multiple test points selected at equal angular intervals.

[0091] The equal angular interval is 45 degrees.

[0092] The PC 11 has a built-in automatic data analysis module, which is used to automatically record the measurement data at each tool face angle position, calculate the deviation value, determine whether it is qualified, and generate a test report.

[0093] The light emitted by the laser 3 is a visible laser beam, and the center of the visible laser spot is used to align with the scale of the dial 2.

[0094] In step a, the testing device includes a PC 11, a gamma ray instrument 8 to be tested, a rotary table 12, a rotary table motor 5, a motor driver 6, a speed controller 7, a conductive slip ring 9, and a regulated power supply 10. A rotating disk 1 is fitted over the rotary table 12, with a gap between the rotating disk 1 and the rotary table 12. A laser 3 is fixedly connected to the rotating disk 1, and a scale 2 is fixedly connected to the outer circumference of the rotating disk 1. One end of the rotary table 12 is connected to the rotary table motor 5, and the other end of the rotary table 12 is connected to the conductive slip ring 9. The conductive slip ring 9 is electrically connected to the gamma ray instrument 8 to be tested, which is mounted on the rotary table 12. The gamma ray instrument 8 to be tested is electrically connected to the regulated power supply 10 and the PC 11. The speed controller 7 is electrically connected to the motor driver 6, which is connected to the rotary table motor 5. A photoelectric sensor 4 is fixedly connected to the rotary table 12, and the photoelectric sensor 4 is electrically connected to the gamma ray instrument 8 to be tested.

[0095] More preferably, the azimuth gamma measuring instrument and the rotating turntable 12 are fixedly connected, and the central axis of the azimuth gamma measuring instrument is coaxial with the rotation axis of the rotating turntable 12.

[0096] Both the rotary table 12 and the rotating disk 1 are made of non-shielded materials.

[0097] In step d, the tool face angle position test sequence is monotonically increasing according to the angle value.

[0098] The motor driver 6 uploads the real-time monitored actual speed information of the rotary table motor 5 to the PC 11, where it is displayed and recorded.

[0099] This embodiment is another preferred implementation. The test sequence of the tool face angle position is monotonically increasing according to the angle value. By specifying the test sequence, the operation process is optimized, the number of repeated adjustments of the rotary disk 1 is reduced, the test efficiency is improved, and the operation errors that may be introduced due to disordered adjustment are reduced.

[0100] The motor driver 6 uploads the real-time monitored actual speed information of the rotary table motor 5 to the PC 11, which displays and records the information. This enables centralized monitoring and recording of speed information, providing data evidence of speed stability during the testing process. If any abnormality occurs in the test results, the speed conditions can be traced back for verification, enhancing the credibility and analyzability of the test results. The invention will now be illustrated with specific examples: The existing 4-sector azimuth gamma products were inspected, with 10 products tested. It was found that the existing azimuth gamma products generally suffered from large deviations in azimuth measurement accuracy and pulse counting time offsets. When evaluating the azimuth measurement accuracy of the tested azimuth gamma products, the rotary table 12 was set to a low speed of 30 r / min. At this speed, the influence of the pulse counting time offset was negligible, and the average absolute value of the azimuth measurement deviation of the tested azimuth gamma circuit was 2.1°. When evaluating the pulse counting time accuracy of the tested azimuth gamma products, the rotary table 12 was set to a high speed of 300 r / min. The angular error corresponding to the counting was converted to time, 1.8° / ms. The average absolute value of the pulse counting time offset of the tested azimuth gamma circuit was 3.5°ms (6.3°). Based on the measurement results, the existing 4-sector azimuth gamma product was designed to improve the azimuth measurement accuracy. At the same time, the pulse counting time was adjusted to make the time offset close to zero. After improvement and optimization, the instrument under test was retested. The combined error of the azimuth measurement accuracy and pulse counting time of the 8-sector azimuth gamma instrument under test was within 2°. This index can meet the accuracy requirements of 16-sector azimuth gamma.

[0101] The application of high-precision passive azimuth gamma testing is suitable for establishing a tool face angle measurement error model for azimuth gamma instruments. The tool face angle measurement error model is constructed based on the deviation values ​​obtained from multiple tool face angle position tests. The error data obtained through testing can be used to construct the error model. The error model can be used to perform software compensation on field measurement data to improve accuracy, and can also be used to guide the improvement of instrument hardware design.

Claims

1. A high-precision passive azimuth gamma testing method, characterized in that, Includes the following steps: Step a: By rotating the rotating disk (1) of the testing device, the laser (3) is positioned to correspond to the preset tool surface angle. Step b: Set the rotation speed of the rotary table (12) using the speed controller (7), start the rotary table motor (5), drive the rotary table motor (5) to rotate using the motor driver (6), and drive the rotary table (12) to rotate. Step c: Monitor the data of the gamma instrument (8) at the target location using PC (11), and obtain the evaluation result by comparing it with the tool surface installation position of the laser (3); Step d, repeat steps a-c until all predetermined tool face angle positions have been tested.

2. The high-precision passive azimuth gamma testing method according to claim 1, characterized in that: In step a, making the laser (3) correspond to the preset tool surface angle position means observing and rotating the rotating disk (1) to make the light emitted by the laser (3) align with the preset angle scale value on the scale disk (2).

3. The high-precision passive azimuth gamma testing method according to claim 1, characterized in that: In step b, setting the rotation speed of the rotary table (12) by means of the speed operator (7) means sending the speed value set by the speed operator (7) to the motor driver (6), and the motor driver (6) controls the rotary table motor (5) to rotate at the set speed.

4. The high-precision passive azimuth gamma testing method according to claim 1, characterized in that: In step b, the rotational speed of the rotary table (12) is 30-300 revolutions per minute.

5. The high-precision passive azimuth gamma testing method according to claim 1, characterized in that: In step c, comparing with the tool face installation position of the laser (3) means that the PC (11) receives the tool face angle measurement data reported by the gamma instrument (8) of the direction to be measured, compares the tool face angle measurement data with the tool face reference angle indicated by the laser (3), calculates the deviation value between the tool face angle measurement data and the tool face reference angle, and judges whether the deviation value exceeds the allowable error range.

6. The high-precision passive azimuth gamma testing method according to claim 1, characterized in that: In step c, the data monitored by the PC (11) on the azimuth gamma instrument (8) refers to the PC (11) receiving and displaying the count of analog gamma pulses generated by the azimuth gamma instrument (8) during its rotation.

7. The high-precision passive azimuth gamma testing method according to claim 1, characterized in that: In step d, the predetermined tool surface angle position refers to multiple test points selected at equal angular intervals.

8. The high-precision passive azimuth gamma testing method according to claim 7, characterized in that: The equal angle intervals are 15 degrees, 30 degrees, or 45 degrees.

9. A high-precision passive azimuth gamma testing method according to claim 5, characterized in that: The PC (11) has a built-in automatic data analysis module, which is used to automatically record the measurement data at each tool face angle position, calculate the deviation value, determine whether it is qualified, and generate a test report.

10. A high-precision passive azimuth gamma testing method according to claim 1, characterized in that: The laser (3) emits a visible laser beam, and the center of the visible laser spot is used to align with the scale of the dial (2).

11. A high-precision passive azimuth gamma testing method according to claim 1, characterized in that: In step a, the testing device includes a PC (11), a gamma instrument for the azimuth to be measured (8), a rotary table (12), a rotary table motor (5), a motor driver (6), a speed controller (7), a conductive slip ring (9), and a regulated power supply (10). A rotating disk (1) is fitted over the rotary table (12), with a gap between the rotating disk (1) and the rotary table (12). A laser (3) is fixedly connected to the rotating disk (1), and a scale (2) is fixedly connected to the outer circumference of the rotating disk (1). One end of the rotary table (12) is connected to the rotary table motor (5). 5) Connection: The other end of the rotary table (12) is connected to the conductive slip ring (9). The conductive slip ring (9) is electrically connected to the gamma instrument (8) to be measured on the rotary table (12). The gamma instrument (8) to be measured is electrically connected to the regulated power supply (10) and the PC (11) respectively. The speed operator (7) is electrically connected to the motor driver (6). The motor driver (6) is connected to the rotary table motor (5). A photoelectric sensor (4) is fixedly connected on the rotary table (12). The photoelectric sensor (4) is electrically connected to the gamma instrument (8) to be measured.

12. The high-precision passive azimuth gamma testing method according to claim 1, characterized in that: The azimuth gamma measuring instrument (8) and the rotating turntable (12) are fixedly connected, and the central axis of the azimuth gamma measuring instrument (8) is coaxial with the rotation axis of the rotating turntable (12).

13. The high-precision passive azimuth gamma testing method according to claim 1, characterized in that: Both the rotary table (12) and the rotating disk (1) are made of non-shielded materials.

14. The high-precision passive azimuth gamma testing method according to claim 1, characterized in that: In step d, the tool face angle position test sequence is monotonically increasing according to the angle value.

15. The high-precision passive azimuth gamma testing method according to claim 1, characterized in that: The motor driver (6) uploads the real-time monitored actual speed information of the rotary table motor (5) to the PC (11), which then displays and records it.

16. An application of high-precision passive azimuth gamma testing, characterized in that: The high-precision passive azimuth gamma testing method described in claim 1 is suitable for testing azimuth gamma instruments equipped with fluxgate sensors for tool face calculation.

17. An application of high-precision passive azimuth gamma testing, characterized in that: The high-precision passive azimuth gamma test method described in claim 1 is suitable for establishing a tool face angle measurement error model for azimuth gamma instruments. The tool face angle measurement error model is constructed based on the deviation values ​​obtained from multiple tool face angle position tests.

18. An application of high-precision passive azimuth gamma testing, characterized in that: The high-precision azimuth gamma passive testing method described in claim 1 is suitable for evaluating the tool face response performance of azimuth gamma instruments in a simulated real downhole passive environment.

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