A micro-logging seismic detector

Abstract

The utility model discloses a kind of micro-logging seismic detectors, including shell, the lower end cover of the lower end fixed setting of shell, the side of shell is hingedly provided with support arm in the part close to the lower end cover, the support arm is connected and is provided with the support arm hoisting rope for adjusting its inclination angle;The mounting hole is opened from the upper end of the shell, and the inner end of the mounting hole extends to the inside middle of the shell and is provided with multiple seismic detectors, the upper end cover of the upper end fixed setting of shell is adapted with the outer end of the mounting hole, the detector hoisting rope is fixedly arranged on the upper end cover, and multiple waterproof sealing structures are provided between the upper end cover and the multiple seismic detectors.The utility model can adapt to different micro-logging terrain, so that the shell of detector can be stably supported on well wall, meet the exploration requirement of different depth.

Description

Technical Field

[0001] This utility model relates to the field of petroleum exploration equipment technology, and in particular to a micro well logging seismic detector. Background Technology

[0002] Microseismic logging, a term in exploration geophysics, is a method of acquiring geophysical parameters by exciting seismic waves in a well and receiving them at the surface (or vice versa). It is often abbreviated as micrologging. Compared to shallow refraction logging, microseismic logging offers higher accuracy and is commonly used in areas with dramatic topographic relief, formation velocity reversals, or complex surface structures such as thin interbedded layers.

[0003] In onshore oil exploration, microseismic logging is frequently used to obtain subsurface geological information, and seismic detectors are essential tools for microseismic logging. However, existing seismic detectors have several shortcomings in complex terrains and harsh environments. For example, current seismic detectors are directly inserted into the microseismic well using a lifting rope, lacking appropriate fixing methods, resulting in poor stability during operation. Furthermore, existing detectors have poor sealing performance and insufficient corrosion resistance, allowing mud and water mixtures from the well to easily seep into the detector, damaging its electronic components. Therefore, it is necessary to improve seismic detectors to meet broader exploration needs. Utility Model Content

[0004] The purpose of this invention is to provide a micro-logging seismic detector to solve the technical problems mentioned in the background section.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This utility model discloses a micro-logging seismic detector, comprising a housing, a lower end cap fixedly mounted on the lower end of the housing, a support arm hinged to the side of the housing near the lower end cap, and a support arm lifting rope for adjusting its tilt angle connected to the support arm; a mounting hole is formed at the upper end of the housing, the inner end of the mounting hole extends to the middle of the interior of the housing and a plurality of seismic detectors are mounted thereon; an upper end cap adapted to the outer end of the mounting hole is fixedly mounted at the upper end of the housing; each seismic detector is electrically connected to a ground data processing device through a transmission cable passing through the upper end cap and extending to the outside of the housing; a detector lifting rope is fixedly mounted on the upper end cap; and a multi-layer waterproof sealing structure is provided between the upper end cap and the plurality of seismic detectors.

[0006] Furthermore, the outer casing is made of SUS304L stainless steel.

[0007] Furthermore, the upper end of the support arm is hinged to the outer shell via a pin, the support arm lifting rope is fixedly connected to the middle of the side of the support arm away from the outer shell, and the lower end of the support arm is densely provided with multiple teeth.

[0008] Furthermore, a nylon detector support frame is provided between each pair of adjacent seismic detectors.

[0009] Furthermore, the number of the multiple seismic detectors is four, and they are arranged in a two-series-two-parallel configuration.

[0010] Furthermore, the plurality of the seismic detectors are electrically connected to a terminal block disposed in the center of the mounting hole via detector connection lines, and the terminal block is electrically connected to the transmission cable.

[0011] Furthermore, the multiple waterproof sealing structure includes a detector waterproof plug fixedly sleeved on the detector connection line and a cable waterproof plug fixedly sleeved on the transmission cable.

[0012] Furthermore, the detector connection wire is fitted with a detector waterproof plug fixing screw at the position between the detector waterproof plug and the terminal block. The outer peripheral wall of the detector waterproof plug fixing screw is threaded to the inner peripheral wall of the housing, and the lower end of the detector waterproof plug fixing screw abuts against the upper end of the detector waterproof plug.

[0013] Furthermore, the transmission cable is fitted with a cable fixing screw at the position between the terminal block and the upper end cover. The outer peripheral wall of the cable fixing screw is threadedly connected to the inner peripheral wall of the outer casing. The cable waterproof plug is disposed inside the cable fixing screw. The upper part of the inner peripheral wall of the cable fixing screw is provided with a cable waterproof plug fixing screw threadedly connected thereto. The lower end of the cable waterproof plug fixing screw abuts against the upper end of the cable waterproof plug.

[0014] Furthermore, the detector lifting rope is fixedly connected to the upper end cover by a lifting rope fixing pin located in the middle of the upper end cover.

[0015] Compared with the prior art, the beneficial technical effects of this utility model are as follows: This invention features a support arm hinged to the outer shell of a seismic geophone. The inclination angle of the support wall and the toothed portion of the support arm can be controlled and adjusted via a lifting rope, thereby adapting to different micro-logging terrains and ensuring that the geophone's outer shell is stably supported on the well wall to meet exploration requirements at different depths.

[0016] The present invention provides a multi-layered waterproof sealing structure inside the housing for installing seismic detectors, between the upper end cover and the multiple seismic detectors, to ensure that the inside of the housing, the multiple seismic detectors, and the connecting cables remain dry even in humid or watery environments, and to prevent the geological detectors from being corroded and damaged by the mud and water mixture inside the well. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 Enlarged structural diagram at point A; Figure 3 for Figure 1 Enlarged structural diagram at point B; Explanation of reference numerals in the attached diagram: 1. Support arm; 2. Detector waterproof plug; 3. Terminal block; 4. Cable waterproof plug; 5. Cable waterproof plug fixing screw; 6. Support arm lifting rope; 7. Lower end cover; 8. Housing; 9. Seismic detector; 10. Detector support frame; 11. Detector connecting cable; 12. Detector waterproof plug fixing screw; 13. Sealing ring; 14. Cable fixing screw; 15. Transmission cable; 16. Lifting rope fixing pin; 17. Upper end; 18. Detector lifting rope. Detailed Implementation

[0019] like Figures 1-3 As shown, a micro-logging seismic detector includes a housing 8, which is 850 mm in length and 60 mm in maximum diameter. It is made entirely of SUS304L stainless steel, which has excellent corrosion resistance and can adapt to various harsh terrestrial environments.

[0020] A lower end cover 7 is fixedly installed at the lower end of the outer casing 8. A support arm 1 is hinged to the side of the outer casing 8 near the lower end cover 7. A support arm lifting rope 6 for adjusting its tilt angle is connected to the support arm 1. Specifically, the support arm 1 is hinged to the outer casing 8 near the upper end via a pin. The support arm lifting rope 6 is fixedly connected to the middle of the side of the support arm 1 away from the outer casing 8. The lower end of the support arm 1 is densely covered with multiple teeth. Through the above configuration, the tilt angle of the support arm 1 and the spacing between the outer casings can be controlled and adjusted by the support arm lifting rope, thereby adapting to different micro-logging well terrains and ensuring that the detector's outer casing can be stably supported on the well wall to meet the exploration requirements at different depths.

[0021] The outer casing 8 has a mounting hole at its upper end, and the inner end of the mounting hole extends to the middle of the interior of the casing, where multiple seismic detectors 9 are disposed. A nylon detector support frame 10 is disposed between each pair of adjacent seismic detectors 9, supporting the detectors. In this embodiment, the number of seismic detectors 9 is four, model CD-7 (SG10) seismic detectors, which have advantages such as high sensitivity, wide bandwidth, and good stability. The four seismic detectors are arranged in a two-series, two-parallel configuration, improving the efficiency and accuracy of data acquisition.

[0022] An upper end cover 17, which is adapted to the outer end of the mounting hole, is fixedly installed on the upper end of the outer casing 8. The inner peripheral wall of the upper end cover 17 is fixedly connected to the outer peripheral wall of the outer casing 8 by a threaded connection. Each of the seismic detectors 9 is electrically connected to the ground data processing equipment through a transmission cable 15 that passes through the upper end cover 17 and extends to the outside of the outer casing 8. Specifically, multiple seismic detectors 9 are electrically connected to a terminal block 3 located in the middle of the mounting hole through detector connection lines 11. The terminal block 3 is electrically connected to the transmission cable 15.

[0023] The present invention provides a multi-layer waterproof sealing structure for the housing of the seismic detector, between the upper end cover 17 and the multiple seismic detectors 9, to ensure that the interior remains dry in humid or watery environments and to prevent corrosion and damage.

[0024] The multiple waterproof sealing structure includes a detector waterproof plug 2 fixedly sleeved on the detector connection line 11 and a cable waterproof plug 4 fixedly sleeved on the transmission cable 15.

[0025] The detector connecting line 11 is fitted with a detector waterproof plug fixing screw 12 at the position between the detector waterproof plug 2 and the terminal block 3. The outer peripheral wall of the detector waterproof plug fixing screw 12 is threaded to the inner peripheral wall of the housing 8, and the lower end of the detector waterproof plug fixing screw 12 abuts against the upper end of the detector waterproof plug 2.

[0026] The transmission cable 15 is fitted with a cable fixing screw 14 at the position between the terminal block 3 and the upper end cover 17. The outer peripheral wall of the cable fixing screw 14 is threadedly connected to the inner peripheral wall of the outer casing 8, and a sealing ring 13 is provided between the cable fixing screw 14 and the stepped surface on the inner peripheral wall of the outer casing 8. The cable waterproof plug 4 is disposed inside the cable fixing screw 14, and a cable waterproof plug fixing screw 5 is threadedly connected to the upper part of the inner peripheral wall of the cable fixing screw 14. The lower end of the cable waterproof plug fixing screw 5 abuts against the upper end of the cable waterproof plug 4.

[0027] A detector lifting rope 18 is fixedly installed on the upper end cover 17. Specifically, the detector lifting rope 18 is fixedly connected to the upper end cover 17 through a lifting rope fixing pin 16 located in the middle of the upper end cover 17.

[0028] The working principle of this utility model is as follows: First, the geophone is deployed: During oil exploration, the geophone is deployed at a suitable location and well depth according to the exploration needs and geological conditions. The tilt angle of the support arm is manually controlled by the support arm lifting rope to ensure that the geophone can be stably supported on the well wall. The position of the geophone downhole can be adjusted as needed by controlling the geophone lifting rope.

[0029] Generating seismic waves: A seismic source, such as explosives or other vibrating devices, is placed on the ground or in a well to generate seismic waves. Seismic waves propagate underground and are reflected and refracted when they encounter different geological structures.

[0030] Data reception and recording: When seismic waves propagate to the vicinity of the detector, the detector receives the mechanical vibrations caused by the seismic waves and converts them into electrical signals. These electrical signals are transmitted through transmission cables to ground-based data processing equipment, where they are recorded and analyzed.

[0031] Data processing and analysis: Ground-based data processing equipment further processes and analyzes the received signals, such as filtering, amplification, and overlay. By analyzing the processed data, information such as underground stratigraphic structure and rock properties can be obtained, providing crucial reference data for oil exploration.

[0032] In summary, micro-logging seismic detectors receive and convert the mechanical vibrations caused by seismic waves into electrical signals, which are then transmitted to the surface via cables for recording and analysis. This data acquisition method provides an efficient and accurate technical means for oil exploration.

[0033] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A micro-logging seismic detector, characterized in that: The device includes an outer casing, with a lower end cover fixedly installed at the lower end. A support arm is hinged to the side of the outer casing near the lower end cover, and a support arm lifting rope for adjusting its tilt angle is connected to the support arm. The outer casing has a mounting hole at its upper end, the inner end of which extends to the middle of the interior of the outer casing and houses multiple seismic detectors. An upper end cover that matches the outer end of the mounting hole is fixedly installed at the upper end of the outer casing. Each seismic detector is electrically connected to ground-based data processing equipment via a transmission cable that passes through the upper end cover and extends to the outside of the outer casing. A detector lifting rope is fixedly installed on the upper end cover, and a multi-layer waterproof sealing structure is provided between the upper end cover and the multiple seismic detectors.

2. The micro-logging seismic detector according to claim 1, characterized in that: The outer casing is made of SUS304L stainless steel.

3. The micro-logging seismic detector according to claim 1, characterized in that: The upper end of the support arm is hinged to the outer shell via a pin, the lifting rope of the support arm is fixedly connected to the middle of the side of the support arm away from the outer shell, and the lower end of the support arm is densely provided with multiple teeth.

4. The micro-logging seismic detector according to claim 1, characterized in that: A nylon detector support frame is provided between each pair of adjacent seismic detectors.

5. The micro-logging seismic detector according to claim 2, characterized in that: The number of the aforementioned seismic detectors is four, and they are arranged in a two-series-two-parallel configuration.

6. The micro-logging seismic detector according to claim 5, characterized in that: The plurality of the seismic detectors are electrically connected to a terminal block located in the center of the mounting hole via detector connection lines, and the terminal block is electrically connected to the transmission cable.

7. The micro-logging seismic detector according to claim 6, characterized in that: The multiple waterproof sealing structure includes a detector waterproof plug fixedly sleeved on the detector connection line and a cable waterproof plug fixedly sleeved on the transmission cable.

8. The micro-logging seismic detector according to claim 7, characterized in that: The detector connection wire is fitted with a detector waterproof plug fixing screw at the position between the detector waterproof plug and the terminal block. The outer peripheral wall of the detector waterproof plug fixing screw is threaded to the inner peripheral wall of the housing, and the lower end of the detector waterproof plug fixing screw abuts against the upper end of the detector waterproof plug.

9. The micro-logging seismic detector according to claim 7, characterized in that: The transmission cable is fitted with a cable fixing screw at the position between the terminal block and the upper end cover. The outer peripheral wall of the cable fixing screw is threaded to the inner peripheral wall of the outer shell. The cable waterproof plug is disposed inside the cable fixing screw. The upper part of the inner peripheral wall of the cable fixing screw is provided with a cable waterproof plug fixing screw threaded to it. The lower end of the cable waterproof plug fixing screw abuts against the upper end of the cable waterproof plug.

10. The micro-logging seismic detector according to claim 1, characterized in that: The detector lifting rope is fixedly connected to the upper end cover by a lifting rope fixing pin located in the middle of the upper end cover.

Images