Near-bit gamma imaging simulation experiment device

Abstract

The utility model discloses a near-bit gamma imaging simulation experiment device. The near-bit gamma imaging simulation experiment device comprises a vibration mechanism and a rotating mechanism, the vibration mechanism comprises a workbench, a vibration plate, a vibration motor and a damping spring; a vibrating plate is movably arranged above the workbench; a vibration motor is mounted in the center of the top surface of the vibration plate; damping springs are arranged at four corners of the bottom surface of the vibration plate in the vertical direction; supporting columns are fixedly arranged at the four corners of the top face of the workbench in the vertical direction and correspond to the damping springs. The rotating mechanism comprises a suspender, a rotating shaft and a motor; hanging rods are fixedly arranged on the bottom surfaces of the two ends of the vibration plate in the length direction in the vertical direction; a rotating shaft is rotatably arranged at the bottom end of the lifting rod in the length direction of the vibration plate; a near-bit gamma measuring instrument is detachably arranged between the two rotating shafts; a motor is mounted on the bottom surface of the vibrating plate; and the motor is in transmission connection with the adjacent rotating shaft. The near-bit gamma imaging simulation experiment device can simulate vibration and rotation environments.

Description

Technical Field

[0001] This application relates to the technical field of near-bit gamma tools, and particularly to a near-bit gamma imaging simulation experiment device. Background Art

[0002] In recent years, the technology of using horizontal wells to improve oil and gas reservoirs has been widely applied in various oil fields. The near-bit geological steering drilling system has the characteristics of real-time judgment of formation properties, exploration of the formation to be drilled, and accurate steering. The real-time acquisition of near-bit gamma parameters helps on-site drilling engineers to master the drilling trajectory and geological parameters in real time during drilling, thereby improving the oil drilling and production rate. Compared with traditional gamma curve logging, near-bit gamma imaging technology can display the changes in the lithology of the surrounding formation during drilling in 360°. It solves the geological steering problem in ultra-thin oil reservoirs that cannot be achieved by traditional gamma ray tools, and realizes functions such as real-time and accurate judgment of formation properties and accurate steering in ultra-thin oil reservoirs. How to effectively simulate and calibrate near-bit gamma parameters and their imaging is the key to near-bit gamma measurement instruments.

[0003] After retrieval, a patent with the publication (announcement) number CN107035358B discloses a near-bit gamma imaging simulation experiment device. This device adjusts the real-time rotation speed and reads the rotation speed changes during the simulation of horizontal well drilling. The gamma parameters collected during the rotation of the near-bit are sent to the gamma imaging processing system through the gamma data real-time reading device. The application of this device can provide a reliable simulation test method for the realization of near-bit gamma imaging engineering and the optimization of gamma parameter data processing methods.

[0004] However, during the working process of the near-bit, vibrations often occur. Different vibration intensities have different impacts on the near-bit gamma measurement instrument. Therefore, it is necessary to design a near-bit gamma imaging simulation experiment device for simulating gamma imaging of the near-bit gamma measurement instrument under different vibration states and different rotation speeds. Summary of the Invention

[0005] In view of the above defects or deficiencies in the prior art, it is desired to provide a near-bit gamma imaging simulation experiment device that simulates a vibration environment and a rotation environment.

[0006] A near-bit gamma imaging simulation experiment device provided by this application includes a vibration mechanism and a rotation mechanism;

[0007] The vibration mechanism includes a workbench, a vibration plate, a vibration motor and a shock-absorbing spring; a vibration plate is movably arranged above the workbench; a vibration motor is installed at the center of the top surface of the vibration plate; shock-absorbing springs are arranged at the four corners of the bottom surface of the vibration plate in the vertical direction; pillars are fixedly arranged at the four corners of the top surface of the workbench corresponding to the shock-absorbing springs in the vertical direction; the two ends of the shock-absorbing spring along the axial direction are fixedly connected to the bottom surface of the vibration plate and the top surface of the corresponding pillar respectively;

[0008] The rotating mechanism includes a suspension rod, a rotating shaft and a motor; the bottom surfaces of both ends of the vibration plate along the length direction are fixed with suspension rods in the vertical direction; the bottom end of the suspension rod is rotatably provided with a rotating shaft along the length direction of the vibration plate; a near-drill bit gamma measuring instrument is detachably provided between the two rotating shafts; a motor is installed on the bottom surface of the vibration plate; and the motor is drivingly connected to the adjacent rotating shaft.

[0009] Preferably, a slip ring is provided below one end of the vibration plate away from the motor in the length direction; the fixed part of the slip ring is detachably connected to the adjacent suspension rod, and the rotating part is detachably connected to the adjacent rotating shaft.

[0010] Preferably, a gamma data acquisition and imaging system is installed at one end of the workbench away from the motor along the length direction.

[0011] Preferably, a vibration sensor and a rotation speed sensor are installed on the bottom surface of one end of the vibration plate close to the motor along the length direction.

[0012] Preferably, a controller is installed at one end of the workbench close to the motor along the length direction; the vibration motor, the motor, the vibration sensor and the speed sensor are all electrically connected to the controller.

[0013] Preferably, the top surface of the workbench is provided with a radioactive rock layer.

[0014] Compared with the prior art, the beneficial effects of this application are:

[0015] The present application sets up a vibration mechanism and a rotation mechanism to simulate the vibration environment and rotation environment of the near-drill bit gamma measuring instrument when it is working, and uses radioactive rock formations as the oil and gas layer simulation system. The gamma data detected by the near-drill bit gamma measuring instrument in the simulated environment is processed and transmitted to the gamma data acquisition and imaging system for processing and display, thereby providing a reliable simulation test environment for the realization of the near-drill bit gamma imaging project and the optimization of the gamma parameter data processing method.

[0016] It should be understood that the contents described in the Summary of the Invention are not intended to limit the key or important features of the embodiments of the present application, nor are they intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments read in conjunction with the accompanying drawings:

[0018] Figure 1 FIG. is a schematic structural diagram of a near-bit gamma imaging simulation experiment device provided for an embodiment of the present application.

[0019] Reference numerals in the figure: 1, vibration mechanism; 2, rotation mechanism; 3, near-bit gamma measuring instrument; 4, radioactive rock formation;

[0020] 11, workbench; 12, vibration plate; 13, vibration motor; 14, shock-absorbing spring; 15, support column;

[0021] 21, suspension rod; 22, rotating shaft; 23, motor;

[0022] 31, slip ring; 32, gamma data acquisition and imaging system; 33, vibration sensor; 34, rotational speed sensor; 35, controller. Specific embodiments

[0023] The present application will be further described in detail below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the related application and not for limiting the application. Additionally, it should be noted that for the sake of description, only parts related to the application are shown in the drawings.

[0024] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0025] Please refer to Figure 1 , an embodiment of the present application provides a near-bit gamma imaging simulation experiment device, including a vibration mechanism 1 and a rotation mechanism 2;

[0026] The vibration mechanism 1 includes a workbench 11, a vibration plate 12, a vibration motor 13, and shock-absorbing springs 14; a vibration plate 12 is movably arranged above the workbench 11; a vibration motor 13 is installed at the center of the top surface of the vibration plate 12; shock-absorbing springs 14 are arranged vertically at the four corners of the bottom surface of the vibration plate 12; support columns 15 are fixedly arranged vertically corresponding to the shock-absorbing springs 14 at the four corners of the top surface of the workbench 11; both ends of the shock-absorbing springs 14 in the axial direction are fixedly connected to the bottom surface of the vibration plate 12 and the top surface of the corresponding support column 15;

[0027] The rotating mechanism 2 includes a suspension rod 21, a rotating shaft 22 and a motor 23; the bottom surfaces of both ends of the vibration plate 12 along the length direction are fixedly provided with suspension rods 21 in the vertical direction; the bottom end of the suspension rod 21 is rotatably provided with a rotating shaft 22 along the length direction of the vibration plate 12; a near-drill bit gamma measuring instrument 3 is detachably provided between the two rotating shafts 22; a motor 23 is installed on the bottom surface of the vibration plate 12; the motor 23 is transmission-connected to the adjacent rotating shaft 22.

[0028] In this embodiment, the workbench 11 is used to provide a working space and working environment for the entire device. The vibration plate 12 above the workbench 11 is arranged parallel to the workbench. The vibration motor 13 installed on the vibration plate 12 serves as an excitation source to provide a vibration environment simulation function for the entire device. The vibration intensity of the vibration motor 13 is adjustable.

[0029] The shock absorbing spring 14 is used to connect the vibration plate 12 and the workbench 11 and is also used for shock absorption. The four shock absorbing springs 14 work together to reduce the impact of the vibration of the vibration plate 12 on the workbench, so that the workbench 11 maintains stable operation.

[0030] A bearing seat is installed at the bottom end of the suspension rod 21 along the length direction of the workbench 11 , and the rotating shaft 22 is connected to the rotating part of the adjacent bearing seat, and the bearing seat increases the rotation smoothness and stability of the rotating shaft 22 .

[0031] The two ends of the near-drill-bit gamma measuring instrument 3 along the axial direction are detachably connected to the two rotating shafts 22 , respectively. The detachable connection facilitates the installation, disassembly and replacement of the near-drill-bit gamma measuring instrument 3 .

[0032] The motor 23 adopts a programmable anti-vibration motor with adjustable rotation speed. It has a built-in programmable controller (PLC) or other intelligent control unit to achieve precise adjustment and control of the operating parameters and vibration characteristics of the motor 23. In addition, most mechanical parts adopt anti-vibration design and have good shock resistance.

[0033] When the vibration motor 13 vibrates, it drives the vibration plate 12 to vibrate accordingly, and the vibration is transmitted to the rotating shaft 22 at the bottom end of the suspension rod 21, causing the near-drill-bit gamma measuring instrument 3 to vibrate. The motor 23 drives the rotating shaft 22 connected thereto to rotate, thereby causing the near-drill-bit gamma measuring instrument 3 to rotate.

[0034] In a preferred embodiment, a slip ring 31 is provided below one end of the vibration plate 12 away from the motor 2 along the length direction; the fixed part of the slip ring 31 is detachably connected to the adjacent suspension rod 21, and the rotating part is detachably connected to the adjacent rotating shaft 22.

[0035] In a preferred embodiment, a gamma data acquisition and imaging system 32 is installed at one end of the workbench 11 away from the motor 23 along the length direction.

[0036] Please refer to Figure 1 In this embodiment, the slip ring 31 is installed around a rotating shaft 22. The slip ring 31 mainly consists of two major parts: a rotating part and a fixed part. The rotating part of the slip ring 31 is connected to the rotating shaft 22 and rotates with the rotating shaft 22. The wires of the rotating part are electrically connected to the data acquisition and processing unit of the near-bit gamma measuring instrument 3. The fixed part of the slip ring 31 is installed on the suspension rod 21, and the wires of the fixed part are electrically connected to the gamma data acquisition and imaging system 32. The slip ring 31 is used to transfer the data collected by the data acquisition and processing unit of the near-bit gamma measuring instrument 3 to the gamma data acquisition and imaging system 32 for processing and display after being processed.

[0037] In a preferred embodiment, a vibration sensor 33 and a rotational speed sensor 34 are installed on the bottom surface of one end of the vibration plate 12 close to the motor 23 along the length direction.

[0038] Please refer to Figure 1 In this embodiment, the vibration sensor 33 is a device used to detect and measure vibrations, and is used to detect the vibration intensity of the near-bit gamma measuring instrument 3 in real time.

[0039] The rotational speed sensor 34 is a device that can measure the rotational speed and convert it into an electrical signal output, and is used to detect the rotational speed of the near-bit gamma measuring instrument 3 in real time.

[0040] In a preferred embodiment, a controller 35 is installed at one end of the workbench 11 close to the motor 23 along the length direction; the vibration motor 13, the motor 23, the vibration sensor 33, and the rotational speed sensor 34 are all electrically connected to the controller 35.

[0041] Please refer to Figure 1 In this embodiment, the controller 35 is used to control the working states of various devices, and is used to detect and display the simulated operating state of the near-bit gamma measuring instrument 3.

[0042] In a preferred embodiment, a radioactive rock formation 4 is arranged on the top surface of the workbench 11.

[0043] Please refer to Figure 1 In this embodiment, a radioactive rock formation 4 is arranged on the top surface of the workbench 11. The gamma value in this area is higher than that in other areas. During the rotation of the near-bit gamma measuring instrument 3, the gamma sensor in the near-bit gamma measuring instrument 3 intermittently approaches the radioactive rock formation 4, and the gamma value collected when approaching is higher than that in other areas. When simulating 360° imaging around the wellbore, the gamma value on this side forms a peak, thereby simulating the imaging situation when the near-bit gamma imaging instrument 3 drills in the thin-layer oil and gas in the horizontal well.

[0044] The radioactive rock formation 4 serves as an oil and gas reservoir simulation system. The distance between the radioactive rock formation 4 and the near-bit gamma measuring instrument 3 is about 25 mm, simulating the distance between the near-bit gamma measuring instrument 3 and the wellbore in actual applications.

[0045] The working principle of this application:

[0046] The vibration mechanism 1 and the rotation mechanism 2 are respectively used to simulate the vibration environment and the rotation environment when the near-bit gamma measuring instrument 3 is working. The radioactive rock formation 4 is used as an oil and gas reservoir simulation system. The gamma data detected by the near-bit gamma measuring instrument 3 in the simulated environment is processed and then transmitted to the gamma data acquisition and imaging system 32 for processing and display. Among them, the intensity of the vibration motor and the rotation speed of the motor can both be adjusted, and the working environment of the near-bit gamma measuring instrument 3 under different vibration intensities and different rotation speeds can be simulated.

[0047] In the description of this specification, terms such as "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0049] The above are only the preferred embodiments of this application and are not used to limit this application. For those skilled in the art, various changes and modifications can be made to this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A near-drill-bit gamma imaging simulation experimental device, characterized in that: It includes a vibration mechanism and a rotation mechanism; The vibration mechanism comprises a workbench, a vibration plate, a vibration motor and a shock-absorbing spring; the vibration plate is movably arranged above the workbench; the vibration motor is installed at the center of the top surface of the vibration plate; the shock-absorbing springs are arranged at the four corners of the bottom surface of the vibration plate in the vertical direction; pillars are fixedly arranged at the four corners of the top surface of the workbench corresponding to the shock-absorbing springs in the vertical direction; the two ends of the shock-absorbing spring along the axial direction are fixedly connected to the bottom surface of the vibration plate and the corresponding top surface of the pillar respectively; The rotating mechanism includes a suspension rod, a rotating shaft and a motor; the suspension rods are fixedly arranged in the vertical direction on the bottom surfaces of both ends of the vibration plate along the length direction; the rotating shaft is rotatably arranged at the bottom end of the suspension rod along the length direction of the vibration plate; a near-drill bit gamma measuring instrument is detachably arranged between the two rotating shafts; the motor is installed on the bottom surface of the vibration plate; and the motor is drivingly connected to the adjacent rotating shaft.

2. The near-drill-bit gamma imaging simulation experimental device according to claim 1 is characterized in that: A slip ring is arranged below one end of the vibration plate away from the motor along the length direction; the fixed part of the slip ring is detachably connected to the adjacent suspension rod, and the rotating part is detachably connected to the adjacent rotating shaft.

3. The near-drill-bit gamma imaging simulation experimental device according to claim 2 is characterized in that: A gamma data acquisition and imaging system is installed at one end of the workbench away from the motor along the length direction.

4. The near-drill-bit gamma imaging simulation experimental device according to claim 3 is characterized in that: A vibration sensor and a rotation speed sensor are installed on the bottom surface of one end of the vibration plate close to the motor along the length direction.

5. The near-drill-bit gamma imaging simulation experimental device according to claim 4 is characterized in that: A controller is installed at one end of the workbench close to the motor along the length direction; the vibration motor, the motor, the vibration sensor and the rotation speed sensor are all electrically connected to the controller.

6. The near-drill-bit gamma imaging simulation experimental device according to claim 5 is characterized in that: The top surface of the workbench is provided with a radioactive rock layer.

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