Method and device for monitoring and analyzing fracturing microseism in shale oil and gas well

Abstract

The invention relates to the technical field of microseism monitoring, in particular to a shale oil and gas well fracturing microseism monitoring and analyzing device and method.The shale oil and gas well fracturing microseism monitoring and analyzing device comprises a three-component microseism sensor and further comprises a discharging and taking assembly, and the discharging and taking assembly comprises an upper base, a lower base and a lower base; a first spring is fixedly connected between the upper seat and the top of the lower seat; the top of the lower seat is uniformly in threaded connection with guide column casings, the surface of the lower seat is uniformly in sliding connection with elastic supporting sliding blocks, the inner bottom wall of the lower seat is uniformly in threaded connection with positioning clamping cylinders, the driving rods are vertically and slidably connected to the inner walls of the guide column casings and the positioning clamping cylinders respectively, and the top ends of the driving rods are in threaded connection with the bottom of the upper seat. Therefore, the device is reasonable in structure, the three-component microseismic sensor can be stably installed in a test well, meanwhile, the device has excellent recoverability and can be stably taken out of the test well after use is finished, secondary utilization of the device is greatly promoted, the production cost is effectively reduced, and the working efficiency is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of microseismic monitoring, and in particular to a device and method for monitoring and analyzing microseismic fracturing in a shale oil and gas well. Background Art

[0002] With the development of shale oil and gas fields, hydraulic fracturing technology has become a key means to improve oil and gas recovery rates. During the hydraulic fracturing process, fracturing fluid enters the cracks from the bottom of the well. Due to the continuous accumulation of pressure, the cracks will eventually break and form tiny earthquakes. These earthquakes are called microseisms. In order to facilitate the monitoring of microseisms, in-well microseismic fracture monitoring technology came into being. This technology drills monitoring wells in or near the fracturing wells and deploys three-component microseismic sensors to perform three-dimensional monitoring of the microseisms generated during the fracturing process.

[0003] A patent application with publication number CN108957524B discloses a microseismic detector installation device and method, which is also suitable for the installation of three-component microseismic sensors. However, in actual application, the device has a significant defect: after the ice melts, the connection between the push plate and the concrete plate fails, making it impossible to subsequently remove the sensor by connecting the two. If an attempt is made to remove the sensor by pulling the line, it will be hindered by the weight of the concrete plate and the shrapnel limit, which may cause the line to break or the sensor to be damaged. If the sensor is not removed, it will remain in the well permanently and cannot be recycled, thereby increasing the cost of use. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, the purpose of the present invention is to propose a shale oil and gas well mid-well fracturing microseismic monitoring and analysis device and method. The present invention has a reasonable structure and can stably install a three-component microseismic sensor in a test well. It also has excellent recyclability and can be stably removed from the test well after use. This greatly promotes the secondary utilization of the device, effectively reduces production costs, and significantly improves work efficiency.

[0006] To achieve the above-mentioned object, the present invention proposes a microseismic monitoring and analysis device for fracturing in a shale oil and gas well, comprising a three-component microseismic sensor and a material discharging and taking component, wherein the material discharging and taking component comprises:

[0007] Upper seat: The top is connected to the bottom of the external drill pipe through an air expansion shaft, the bottom is vertically slidably connected to the top of the lower seat, and a first spring is fixedly connected to the top of the lower seat, with an elastic material blocking mechanism built in, which is used to block the connecting pipe at the top of the upper seat after the air expansion shaft is separated from the top of the upper seat to prevent the backfill material from entering the inside of the connecting pipe;

[0008] Lower seat: The top is evenly threadedly connected with a guide column barrel and is located inside the first spring; the bottom is evenly threadedly connected with a support foot and is located outside the three-component microseismic sensor threadedly connected to the center of the bottom of the lower seat; the surface is evenly slidably connected with an elastic support slider; the inner bottom wall is evenly threadedly connected with a positioning cartridge and corresponds to the position of the guide column barrel; the surface of the positioning cartridge is symmetrically provided with a first card slot and a second card slot, which are arranged up and down;

[0009] Drive rod: vertically slidably connected to the inner walls of the guide column tube and the positioning clamping cylinder respectively, the top end of which passes through the outside of the guide column tube and is threadedly connected to the bottom of the upper seat, wherein the end surface is provided with a second positioning groove, a vertical portion and a first positioning groove in sequence from top to bottom along the vertical direction, the second positioning groove and the first positioning groove are respectively clamped and fixed with one end of the elastic support sliding block passing through the interior of the lower seat, the vertical portion is abutted and connected with one end of the elastic support sliding block passing through the interior of the lower seat, and the lower end surface is symmetrically provided with conical elastic clamps, which are respectively clamped and fixed with the first clamping groove and the second clamping groove.

[0010] In addition, the microseismic monitoring and analysis device for fracturing in shale oil and gas wells proposed in the application may also have the following additional technical features:

[0011] Specifically, the elastic material blocking mechanism includes a conical material guide seat fixedly connected to the inner bottom wall of the upper seat, a column groove is opened at the top center of the conical material guide seat, and a blocking column rod is vertically slidably connected to the inner wall of the column groove, a compression spring is fixedly connected between the blocking column rod and the inner bottom wall of the column groove, one end of the blocking column rod passes through the outside of the connecting tube, and the top of the blocking column rod is conical.

[0012] Specifically, a discharge groove is provided on the surface of the upper seat, and a cover plate is clamped and fixed on the inner wall of the discharge groove; a connecting column and a connecting tube are respectively provided at the corresponding positions of the bottom of the upper seat and the top of the lower seat, the connecting column is located inside the connecting tube and is slidably connected to the inner wall of the connecting tube, and a limiting block and a limiting groove are respectively provided at the corresponding positions of the surface of the connecting column and the inner wall of the connecting tube, and the limiting block is vertically slidably connected to the inner wall of the limiting groove.

[0013] Specifically, a pressure sensor is fixedly connected to the inner bottom wall of the connecting cylinder, and a rubber seat is provided at the bottom of the connecting column and is in contact with the pressure sensor.

[0014] Specifically, the elastic support slider includes an arc-shaped support slider, a conical transmission rod and a return spring. An arc-shaped groove is opened at the position of the lower seat surface corresponding to the position of the arc-shaped support slider. The arc-shaped support slider is slidably connected to the inner wall of the arc-shaped groove, the conical transmission rod is slidably connected to the inner wall of the lower seat, and a return spring is fixedly connected to the inner wall of the lower seat. One end of the conical transmission rod is connected to the driving rod, and the other end of the conical transmission rod passes through the interior of the arc-shaped groove and is fixedly connected to the surface of the arc-shaped support slider. The outer surface of the arc-shaped support slider is in the same plane as the outer surface of the lower seat, and the outer surface of the arc-shaped support slider is integrally formed with anti-slip patterns.

[0015] Specifically, one end surface of the tapered transmission rod passing through the arc-shaped slot is rotatably connected to a threaded screw, and the arc-shaped support slider is threadedly connected to the outer surface of the threaded screw and horizontally slidably connected to the outer surface of the tapered transmission rod.

[0016] Specifically, the material discharging and picking assembly is made of stainless steel, and the first spring, guide column, support foot, elastic support slider, positioning cartridge and driving rod are equal in number, and the number is set to be at least four groups.

[0017] The cam is connected with the lower frame and the lower frame is connected with the lower frame, and the cam is connected with the lower frame by the spring, and the spring is connected with the lower frame to the upper frame.

[0018] A method for using a microseismic monitoring and analysis device for fracturing in a shale oil and gas well is applied to the above-mentioned microseismic monitoring and analysis device for fracturing in a shale oil and gas well, comprising the following steps:

[0019] S1: Preparation of test well: Select a suitable location around the fracturing well to drill to create a test well. When the test well is drilled to the predetermined depth, thoroughly clean the debris in the well to ensure the cleanliness of the well environment;

[0020] S2: Installation and lowering of the device: First, the gas expansion shaft is firmly installed on the bottom of the external drill pipe, then the upper seat is installed on the gas expansion shaft to ensure a stable connection, and finally the three-component microseismic sensor is installed on the bottom of the lower seat to complete the assembly of the main components. Using the external drill pipe as a guide, the entire device is slowly lowered into the test well until it reaches the predetermined monitoring depth;

[0021] S3: Fixing and separation of the device: When the support foot contacts the bottom of the test well and is inserted into the soil, the position of the lower seat is initially fixed. At this time, the upper seat continues to move downward under the drive of the external drill rod until the conical elastic clamp is tightly engaged with the first clamping groove to achieve further fixation. During this process, the first positioning groove will squeeze the elastic support slider so that one end of it extends out of the lower seat and is in close contact with the inner wall of the test well, thereby ensuring the stable position of the lower seat. When the conical elastic clamp is firmly engaged with the first clamping groove, the vertical part will maintain a stable contact connection with the elastic support slider to ensure The supporting force is constant. Subsequently, the gas-expanding shaft is separated from the upper seat and taken out of the test well through the external drill rod. When the device needs to be taken out, the gas-expanding shaft is driven to descend into the connecting pipe through the external drill rod, and the gas-expanding shaft is started to fix it to the connecting pipe. Then, the external drill rod is continued to be controlled to descend, driving the driving rod to descend synchronously until the conical elastic clip is engaged and fixed with the second slot. During this process, one end of the elastic support slider will move from the vertical part to the position of the second positioning slot to achieve reset. Finally, the entire device can be smoothly taken out of the test well by lifting the external drill rod.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention has a reasonable structure and can ensure that the three-component microseismic sensor is stably installed in the test well. Its unique design enables the device to remain stable during use, thereby providing accurate and reliable microseismic monitoring data. Specifically, the stability of the present invention is due to its precise mechanical structure and ingenious clamping design. Through the close fit between the conical elastic clamp and the clamping slot, and the stable contact between the elastic support slider and the inner wall of the test well, the present invention can achieve reliable fixation in the test well, effectively preventing the device from being displaced or damaged due to external factors;

[0025] 2. The present invention also has excellent recyclability. Through simple operation, the device can be quickly recycled, which not only improves work efficiency, but also reduces economic losses caused by loss or damage of the device. At the same time, the secondary use of the device also reduces the demand for new equipment, thereby helping to reduce production costs and environmental protection pressure;

[0026] 3. The material of the device of the present invention is stainless steel. Compared with ice and concrete, this choice brings significant convenience and efficiency improvement. Stainless steel is not only easy to carry, but also can be formed in one time without on-site processing or assembly, thereby simplifying the operation process. The operator only needs to carry the device directly to the work site and it can be put into use quickly, which greatly simplifies the installation process and significantly improves work efficiency. The choice of this material not only reflects the practicality and durability of the device, but also fully considers the convenience of on-site operation and the need for rapid response. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0028] Figure 1 This is a schematic diagram of the structure of a microseismic monitoring and analysis device and method for fracturing in a shale oil and gas well of the present invention;

[0029] Figure 2 It is a schematic diagram of the upper seat structure in a shale oil and gas well mid-well fracturing micro-seismic monitoring and analysis device and method of the present invention;

[0030] Figure 3 It is a schematic diagram of the structure of the elastic resistance material mechanism in a shale oil and gas well fracturing microseismic monitoring and analysis device and method of the present invention;

[0031] Figure 4 This is a schematic diagram of the connecting column structure in a shale oil and gas well mid-well fracturing microseismic monitoring and analysis device and method of the present invention;

[0032] Figure 5 It is a schematic diagram of the lower seat structure in a shale oil and gas well in-well fracturing microseismic monitoring and analysis device and method of the present invention;

[0033] Figure 6 This is a schematic diagram of the support foot structure in a shale oil and gas well in-well fracturing microseismic monitoring and analysis device and method of the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of a driving rod in a shale oil and gas well fracturing microseismic monitoring and analysis device and method according to the present invention;

[0035] Figure 8It is a schematic diagram of the structure of the upper reset mechanism in a shale oil and gas well mid-well fracturing microseismic monitoring and analysis device and method of the present invention;

[0036] Fig. 9 It is a schematic diagram of the structure of the lower reset mechanism in a shale oil and gas well mid-well fracturing microseismic monitoring and analysis device and method of the present invention.

[0037] As shown in the figure:

[0038] 100. Three-component microseismic sensor; 1. Material discharging and retrieving assembly;

[0039] 11. Upper seat; 200. Air expansion shaft; 300. External drill rod; 114. First spring; 400. Elastic material blocking mechanism; 111. Connecting pipe; 12. Lower seat; 121. Guide column; 122. Support foot; 123. Elastic support slider; 124. Positioning cartridge; 1241. First slot; 1242. Second slot; 13. Driving rod; 131. Second positioning slot; 132. Vertical portion; 133. First positioning slot; 134. Conical elastic clip;

[0040] 401, conical guide seat; 402, column slot; 403, blocking column rod; 404, compression spring;

[0041] 112, discharge chute; 113, cover plate; 115, connecting column; 1211, connecting tube; 1212, pressure sensor; 116, rubber seat;

[0042] 1231, arc-shaped supporting slider; 1232, tapered transmission rod; 1233, return spring; 12321, threaded screw rod; 1213, arc-shaped slot;

[0043] 14. Reset device; 141. Upper reset mechanism; 142. Lower reset mechanism; 1411. Upper ring; 1412. Second spring; 1413. Conical column rod; 1414. Conical groove; 1421. Lower ring; 1422. Third spring; 1423. Extrusion sleeve. DETAILED DESCRIPTION

[0044] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limitations of the present invention. On the contrary, embodiments of the present invention include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0045] A device and method for monitoring and analyzing microseismic fracturing in a shale oil and gas well according to an embodiment of the present invention will be described below in conjunction with the accompanying drawings.

[0046] like Figure 1-Figure 9 As shown, a shale oil and gas well fracturing microseismic monitoring and analysis device according to an embodiment of the present invention includes a three-component microseismic sensor 100 and a material discharging and taking component 1. The material discharging and taking component 1 includes:

[0047] Upper seat 11: The top is connected to the bottom of the external drill rod 300 through the gas expansion shaft 200, and the bottom is vertically slidably connected to the top of the lower seat 12, and a first spring 114 is fixedly connected to the top of the lower seat 12, and an elastic material blocking mechanism 400 is built in, which is used to block the connecting pipe 111 at the top of the upper seat 11 after the gas expansion shaft 200 is separated from the top of the upper seat 11, so as to prevent the backfill material from entering the connecting pipe 111;

[0048] Lower seat 12: The top is evenly threaded with a guide column 121 and is located inside the first spring 114; the bottom is evenly threaded with a support foot 122 and is located outside the three-component microseismic sensor 100 threaded at the bottom center of the lower seat 12; the surface is evenly slidably connected with an elastic support slider 123; the inner bottom wall is evenly threaded with a positioning cartridge 124 and corresponds to the position of the guide column 121; the surface of the positioning cartridge 124 is symmetrically provided with a first card slot 1241 and a second card slot 1242, and is arranged up and down;

[0049] The driving rod 13 is vertically slidably connected to the inner walls of the guide column 121 and the positioning clamping cylinder 124, respectively, and its top end passes through the outside of the guide column 121 and is threadedly connected to the bottom of the upper seat 11, wherein the end surface is provided with a second positioning groove 131, a vertical portion 132 and a first positioning groove 133 in sequence from top to bottom in the vertical direction, the second positioning groove 131 and the first positioning groove 133 are respectively clamped and fixed with one end of the elastic support slider 123 that passes through the interior of the lower seat 12, the vertical portion 132 is abutted and connected with one end of the elastic support slider 123 that passes through the interior of the lower seat 12, and its lower end surface is symmetrically provided with conical elastic clamps 134, which are respectively clamped and fixed with the first clamping groove 1241 and the second clamping groove 1242.

[0050] It should be noted that the material discharging and retrieving assembly 1 described in this embodiment is built with a wire groove (not shown in the figure) for facilitating the wiring of the three-component microseismic sensor 100.

[0051] Specifically, the present invention has a reasonable structure and can ensure that the three-component microseismic sensor 100 is stably installed in the test well. Its unique design enables the device to remain stable during use, thereby providing accurate and reliable microseismic monitoring data. Specifically, the stability of the present invention is due to its precise mechanical structure and ingenious clamping design. Through the close fit between the conical elastic clamp 134 and the clamping groove, and the firm contact between the elastic support slider 123 and the inner wall of the test well, the present invention can achieve reliable fixation in the test well, effectively preventing the displacement or damage of the device caused by external factors. The present invention also has excellent recyclability, and can be installed and repaired through simple operation. The rapid recovery of the device not only improves work efficiency, but also reduces economic losses caused by loss or damage of the device. At the same time, the secondary use of the device also reduces the demand for new equipment, thereby helping to reduce production costs and environmental protection pressure. Specifically, when in use, first firmly install the gas expansion shaft 200 on the bottom of the external drill rod 300, then install the upper seat 11 on the gas expansion shaft 200 to ensure a firm connection, and finally install the three-component microseismic sensor 100 on the bottom of the lower seat 12 to complete the assembly of the main components. Using the external drill rod 300 as a guide, slowly put the entire device into the test well until it reaches the predetermined monitoring depth. When the support foot 122 After contacting the bottom of the test well and inserting into the soil, the position of the lower seat 12 is initially fixed. At this time, the upper seat 11 continues to move downward under the drive of the external drill rod 300 until the conical elastic clamp 134 is tightly engaged with the first clamping groove 1241 to achieve further fixation. During this process, the first positioning groove 133 will squeeze the elastic support slider 123, so that one end of it extends out of the lower seat 12 and is in close contact with the inner wall of the test well, thereby ensuring the stable position of the lower seat 12. When the conical elastic clamp 134 is firmly engaged with the first clamping groove 1241, the vertical portion 132 will maintain a stable contact connection with the elastic support slider 123 to ensure a constant support force. Subsequently, the gas inflation The shaft 200 is separated from the upper seat 11 and is taken out of the test well through the external drill rod 300. When the device needs to be taken out, the external drill rod 300 drives the gas-expanding shaft 200 to descend into the connecting pipe 111, and the gas-expanding shaft 200 is started to fix it to the connecting pipe 111. Then the external drill rod 300 is controlled to descend, driving the driving rod 13 to descend synchronously until the conical elastic clip 134 is engaged and fixed with the second slot 1242. During this process, one end of the elastic support slider 123 will move from the vertical portion 132 to the position of the second positioning slot 131 to achieve reset. Finally, the entire device can be smoothly taken out of the test well by lifting the external drill rod 300.

[0052] In one embodiment of the present invention, Figure 3As shown, the elastic material blocking mechanism 400 includes a conical material guide seat 401 fixedly connected to the inner bottom wall of the upper seat 11, a column groove 402 is opened at the top center of the conical material guide seat 401, and a blocking column rod 403 is vertically slidably connected to the inner wall of the column groove 402, a compression spring 404 is fixedly connected between the blocking column rod 403 and the inner bottom wall of the column groove 402, one end of the blocking column rod 403 passes through the outside of the connecting tube 111, and the top of the blocking column rod 403 is conical.

[0053] It should be noted that the outer shape of the blocking column rod 403 described in this embodiment is compatible with the inner size of the connecting tube 111 .

[0054] Specifically, the elastic material blocking mechanism 400 is an ingeniously designed component, which is fixedly mounted on the inner bottom wall of the upper seat 11. The core component of the mechanism is the conical material guiding seat 401, which is cleverly located in the bottom center of the upper seat 11. A column groove 402 is opened in the top center of the conical material guiding seat 401. This column groove 402 plays a key role - providing a vertical sliding track for the blocking column 403. The blocking column 403 is the key movable component of the elastic material blocking mechanism 400. It is designed to be able to slide vertically freely in the column groove 402. This design allows it to move flexibly when subjected to external force. More importantly, a compression spring 404 is installed between the blocking column 403 and the inner bottom wall of the column groove 402. This spring plays a role of buffering and resetting. When the blocking column 403 moves downward under pressure, the compression spring 404 will be compressed and store energy. When the external force disappears, the compression spring 404 will release energy to push The blocking column 403 returns to its original position, and one end of the blocking column 403 cleverly passes through the outside of the connecting tube 111, which allows it to directly contact the external backfill, and the top of the blocking column 403 is designed to be conical. This design not only increases its contact area with the backfill, but also improves its penetration ability in the backfill. In general, the elastic material blocking mechanism 400 realizes a flexible and efficient material blocking function through the coordinated work of the conical material guide seat 401, the column groove 402, the blocking column 403 and the compression spring 404. When the backfill tries to pass through the connecting tube 111, they will encounter the obstruction of the blocking column 403. When the blocking column 403 is subjected to the pressure of the air expansion shaft 200, it will move downward and compress the compression spring 404, so as to facilitate the air expansion shaft 200 to enter the interior of the connecting tube 111. When the pressure of the air expansion shaft 200 disappears, the compression spring 404 will push the blocking column 403 back to its original position to continue to block the subsequent backfill.

[0055] In one embodiment of the present invention, Figure 2-Figure 5As shown, a discharge groove 112 is provided on the surface of the upper seat 11, and a cover plate 113 is clamped and fixed on the inner wall of the discharge groove 112; a connecting column 115 and a connecting cylinder 1211 are respectively provided at the corresponding positions of the bottom of the upper seat 11 and the top of the lower seat 12, the connecting column 115 is located inside the connecting cylinder 1211 and is slidably connected to the inner wall of the connecting cylinder 1211, and a limiting block and a limiting groove are respectively provided at the corresponding positions of the surface of the connecting column 115 and the inner wall of the connecting cylinder 1211, and the limiting block is vertically slidably connected to the inner wall of the limiting groove.

[0056] Specifically, the structure of the upper seat 11 is designed to be quite delicate, and a discharge groove 112 is cleverly opened on its surface. The design of this groove is to facilitate the discharge of backfill. In order to ensure that the discharge groove 112 can remain closed when not in use and prevent impurities from entering, a cover plate 113 is cleverly snapped and fixed on the inner wall of the groove. This cover plate 113 not only fits tightly into the groove, but is also easy to open and close, providing great convenience for users. In addition, the connection method between the upper seat 11 and the lower seat 12 has also been carefully designed. Connecting columns 115 and connecting cylinders 1211 are respectively provided at corresponding positions at the bottom of the upper seat 11 and the top of the lower seat 12. This design enables the upper seat 11 to be firmly installed on the lower seat 12 while maintaining a certain degree of flexibility. The connecting column 115 is cleverly It is located inside the connecting cylinder 1211 and is slidably connected to the inner wall of the connecting cylinder 1211. Such a design not only enhances the stability of the structure, but also enables the upper seat 11 to slide and adjust within a certain range relative to the lower seat 12. In order to further ensure that the connection between the upper seat 11 and the lower seat 12 is stable and reliable, the designer respectively arranges limit blocks and limit grooves on the surface of the connecting column 115 and the corresponding positions of the inner wall of the connecting cylinder 1211. The design of these limit blocks and limit grooves is very clever. They can ensure that the connecting column 115 will not deviate from the track when sliding inside the connecting cylinder 1211, while maintaining a certain degree of sliding freedom. The limit block is vertically slidably connected to the inner wall of the limit groove. Such a design not only ensures the stability of the connection, but also enables the upper seat 11 to be fine-tuned as needed.

[0057] In one embodiment of the present invention, Figure 4-Figure 5 As shown, a pressure sensor 1212 is fixedly connected to the inner bottom wall of the connecting cylinder 1211 , and a rubber seat 116 is provided at the bottom of the connecting column 115 and contacts the pressure sensor 1212 .

[0058] It should be noted that the pressure sensor 1212 and the three-component microseismic sensor 100 described in this embodiment are both connected to a controller outside the test well via a bus system.

[0059] Specifically, a key component, pressure sensor 1212, is designed at the bottom of the connecting cylinder 1211. It is firmly fixed to the inner bottom wall of the connecting cylinder 1211. The pressure sensor 1212 plays a vital role. It can sense and measure the pressure changes acting on it in real time, and judge the positions of the conical elastic clamp 134 and the elastic supporting slider 123 through the pressure changes. At the same time, a rubber seat 116 is cleverly arranged at the bottom of the connecting column 115. The rubber seat 116 not only has excellent elasticity and wear resistance, but also can ensure the stable contact between the connecting column 115 and the pressure sensor 1212. When the connecting column 115 slides or adjusts with the upper seat 11 relative to the lower seat 12, the rubber seat 116 will always be in contact with the lower seat 12. The pressure sensor 1212 maintains contact, thereby ensuring that the pressure sensor 1212 can accurately capture any pressure changes. This design enables the entire device to monitor and respond to changes in external pressure in real time. The pressure generated by the upper seat 11 will be transmitted to the pressure sensor 1212 through the connecting column 115 and the rubber seat 116. The pressure sensor 1212 will immediately sense this pressure change and convert it into an electrical signal for output. In this way, the user can understand the position of the conical elastic clip 134 and the elastic support slider 123 by monitoring these electrical signals, and make corresponding adjustments or operations. The design of the pressure sensor 1212 in the connecting tube 1211 and the rubber seat 116 at the bottom of the connecting column 115 provides users with more accurate and reliable monitoring data.

[0060] In one embodiment of the present invention, Figure 6 As shown, the elastic support slider 123 includes an arc-shaped support slider 1231, a tapered transmission rod 1232 and a return spring 1233. An arc-shaped groove 1213 is provided at the position of the lower seat 12 corresponding to the position of the arc-shaped support slider 1231. The arc-shaped support slider 1231 is slidably connected to the inner wall of the arc-shaped groove 1213. The tapered transmission rod 1232 is slidably connected to the inner wall of the lower seat 12, and a return spring 1233 is fixedly connected to the inner wall of the lower seat 12. One end of the tapered transmission rod 1232 is connected to the driving rod 13, and the other end of the tapered transmission rod 1232 passes through the interior of the arc-shaped groove 1213 and is fixedly connected to the surface of the arc-shaped support slider 1231. The outer surface of the arc-shaped support slider 1231 is in the same plane as the outer surface of the lower seat 12, and the outer surface of the arc-shaped support slider 1231 is integrally formed with anti-slip patterns.

[0061] Specifically, the elastic support slider 123 is a sophisticated component that integrates multiple functions. It is mainly composed of three parts: an arc-shaped support slider 1231, a tapered transmission rod 1232 and a return spring 1233. This design not only enhances the stability and flexibility of the device, but also provides users with a safer and more reliable operating experience. First, the arc-shaped support slider 1231 is cleverly designed to be a shape that matches the arc-shaped groove 1213 on the surface of the lower seat 12. This design enables the arc-shaped support slider 1231 to be tightly slidably connected to the inner wall of the arc-shaped groove 1213, thereby ensuring a stable support effect under various operating conditions. At the same time, the outer surface of the arc-shaped support slider 1231 is in the same plane as the outer surface of the lower seat 12. This design is not only beautiful, but also can effectively prevent the accumulation of debris or dust, and keep the device clean and tidy. The tapered transmission rod 1232 is a key component connecting the arc-shaped support slider 1231 and the driving rod 13. One end of it is connected to the driving rod 13, and the other end passes through the inside of the arc-shaped groove 1213. The conical transmission rod 1232 is fixedly connected to the surface of the arc-shaped support slider 1231. This design enables the drive rod 13 to transmit force to the arc-shaped support slider 1231 through the conical transmission rod 1232 when an external force is applied, thereby driving it to slide along the arc-shaped slot 1213. At the same time, a return spring 1233 is fixedly connected between the conical transmission rod 1232 and the inner wall of the lower seat 12. The return spring 1233 plays a role of buffering and resetting. When the conical transmission rod 1232 is moved by an external force, the return spring 1233 will be compressed and store energy, and when the external force disappears, the return spring 1233 will release energy to push the conical transmission rod 1232 and the arc-shaped support slider 1231 back to their original positions. In addition, in order to enhance the anti-slip performance of the arc-shaped support slider 1231, the designer has integrally formed anti-slip grooves on its outer surface. These anti-slip grooves not only increase the friction between the arc-shaped support slider 1231 and the contact surface, but also effectively prevent sliding or displacement during operation, thereby ensuring the safety and stability of the device.

[0062] In one embodiment of the present invention, Figure 6 As shown, the conical transmission rod 1232 passes through the arc-shaped slot 1213 and is rotatably connected to one end surface of the threaded screw 12321. The arc-shaped supporting slider 1231 is threadedly connected to the outer surface of the threaded screw 12321 and horizontally slidably connected to the outer surface of the conical transmission rod 1232.

[0063] It should be noted that a driving port is provided on the threaded screw 12321 described in this embodiment to facilitate driving by an external object.

[0064] Specifically, the threaded screw 12321 can be provided to adjust the extension length of the arc-shaped supporting slider 1231, so as to adapt to test wells with different inner diameters, which is highly practical and has good use effect.

[0065] In one embodiment of the present invention, Figure 1 As shown, the material discharging and picking assembly 1 is made of stainless steel, and the number of the first spring 114, the guide column 121, the support foot 122, the elastic support slider 123, the positioning cartridge 124 and the driving rod 13 is equal, and the number is set to four groups at least.

[0066] Specifically, the material of the device of the present invention is stainless steel. Compared with ice and concrete, this choice brings significant convenience and efficiency improvement. Stainless steel is not only easy to carry, but also can be formed in one time without on-site processing or assembly, thereby simplifying the operation process. The operator only needs to carry the device directly to the work site to put it into use quickly, which greatly simplifies the installation process and significantly improves work efficiency. The choice of this material not only reflects the practicality and durability of the device, but also fully considers the convenience of on-site operation and the need for rapid response. The equal quantity and the minimum setting of four groups are conducive to the overall stability of the device and good use effect.

[0067] In one embodiment of the present invention, Figure 1 , Figure 8-Figure 9 As shown, it also includes a reset device 14, which includes an upper reset mechanism 141 and a lower reset mechanism 142, which are respectively arranged on the top of the lower seat 12 and the bottom of the lower seat 12; the upper reset mechanism 141 includes an upper ring 1411, a second spring 1412, a tapered column 1413 and a tapered groove 1414, the upper ring 1411 is vertically slidably connected to the top of the lower seat 12, and the second spring 1412 is fixedly connected to the top of the lower seat 12, the tapered column 1413 is vertically slidably connected to the inner wall of the lower seat 12, and is connected to a portion of the lower seat 12 that penetrates the upper ring 1411 and is fixedly connected to the upper wall of the lower seat 12. The end surface is fixedly connected, and the conical groove 1414 is opened on the surface of the arc-shaped supporting slider 1231 and corresponds to the position of the conical column rod 1413. One end of the conical column rod 1413 is slidably connected to the inner wall of the conical groove 1414; the lower reset mechanism 142 includes a lower ring ring 1421, a third spring 1422 and an extrusion sleeve 1423. The lower ring ring 1421 is vertically slidably connected to the bottom of the lower seat 12, and the third spring 1422 is fixedly connected to the bottom of the lower seat 12. The extrusion sleeve 1423 is vertically slidably connected to the outer surface of the positioning cartridge 124, and is fixedly connected to one end surface of the lower ring ring 1421 that penetrates into the interior of the lower seat 12.

[0068] Specifically, the reset device 14 is a component with exquisite design and powerful functions. It is mainly composed of an upper reset mechanism 141 and a lower reset mechanism 142, which are respectively arranged at the top and bottom of the lower seat 12. The design of the upper reset mechanism 141 is very clever. It includes an upper ring 1411, which is vertically slidably connected to the top of the lower seat 12, and a second spring 1412 is fixedly connected to the top of the lower seat 12. This spring plays a role of buffering and resetting. When the device is subjected to external force, the upper ring 1411 will move relative to the lower seat 12 and compress the second spring 1412. 12. When the external force disappears, the second spring 1412 will release the stored energy and push the upper ring 1411 back to its original position. In addition, the upper reset mechanism 141 also includes a tapered column 1413, which is vertically slidably connected to the inner wall of the lower seat 12 and fixedly connected to the end surface of the upper ring 1411 that penetrates into the lower seat 12. The design of this tapered column 1413 is very critical. It corresponds to the position of the tapered groove 1414 provided on the surface of the arc-shaped support slider 1231 and can be slidably connected to the inner wall of the tapered groove 1414. This design makes it possible to press the upper ring 1411 when The conical column rod 1413 is synchronously driven to enter the conical groove 1414, and the arc-shaped support slider 1231 is synchronously squeezed to move to one side, so as to facilitate the reset of the driving rod 13. After the driving rod 13 is reset, the arc-shaped support slider 1231 can be reconnected with the first positioning groove 133, so as to facilitate the next use. The design of the lower reset mechanism 142 is also excellent, which includes a lower ring 1421, which is vertically slidably connected to the bottom of the lower seat 12, and a third spring 1422 is fixedly connected to the bottom of the lower seat 12. The function of this spring is similar to that of the second spring 1412, and both are to provide buffering and reset. In addition, the lower reset mechanism 142 also includes a squeezing sleeve 1423, which is vertically slidably connected to the outer surface of the positioning cartridge 124, and is fixedly connected to the surface of one end of the lower ring 1421 that penetrates into the lower seat 12. This design allows the squeezing sleeve 1423 to be synchronously driven to move upward along the positioning cartridge 124 when the lower ring 1421 is lifted, and the conical elastic clip 134 is synchronously squeezed to reset during the upward movement. After the conical elastic clip 134 is reset, it is separated from the positioning cartridge 124, and the drive rod 13 is also reset under the elastic force of the first spring 114, which is convenient for the next use.

[0069] A method for using a microseismic monitoring and analysis device for fracturing in a shale oil and gas well, which is applied to the above-mentioned microseismic monitoring and analysis device for fracturing in a shale oil and gas well, comprises the following steps:

[0070] S1: Preparation of test well: Select a suitable location around the fracturing well to drill to create a test well. When the test well is drilled to the predetermined depth, thoroughly clean the debris in the well to ensure the cleanliness of the well environment;

[0071] S2: Installation and lowering of the device: First, the gas expansion shaft 200 is firmly installed on the bottom of the external drill rod 300, and then the upper seat 11 is installed on the gas expansion shaft 200 to ensure a stable connection. Finally, the three-component microseismic sensor 100 is installed on the bottom of the lower seat 12 to complete the assembly of the main components. Using the external drill rod 300 as a guide, the entire device is slowly placed into the test well until it reaches the predetermined monitoring depth;

[0072] S3: Fixing and separation of the device: When the support foot 122 contacts the bottom of the test well and is inserted into the soil, the position of the lower seat 12 is initially fixed. At this time, the upper seat 11 continues to move downward under the drive of the external drill rod 300 until the conical elastic clamp 134 is tightly engaged with the first clamping groove 1241 to achieve further fixation. During this process, the first positioning groove 133 will squeeze the elastic support slider 123, so that one end of it extends out of the lower seat 12 and is in close contact with the inner wall of the test well, thereby ensuring the stable position of the lower seat 12. When the conical elastic clamp 134 is firmly engaged with the first clamping groove 1241, the vertical portion 132 will maintain a stable contact connection with the elastic support slider 123 to ensure the supporting force. The degree is constant, and then the gas expansion shaft 200 is separated from the upper seat 11 and taken out of the test well through the external drill rod 300. When the device needs to be taken out, the gas expansion shaft 200 is driven to descend to the inside of the connecting pipe 111 through the external drill rod 300, and the gas expansion shaft 200 is started to fix it with the connecting pipe 111. Then, the external drill rod 300 is continued to be controlled to descend, driving the driving rod 13 to descend synchronously until the conical elastic clip 134 is clamped and fixed with the second slot 1242. During this process, one end of the elastic support slider 123 will move from the vertical portion 132 to the position of the second positioning slot 131 to achieve reset. Finally, the entire device can be smoothly taken out of the test well by lifting the external drill rod 300.

[0073] In summary, the embodiment of the present invention is a shale oil and gas well mid-well fracturing microseismic monitoring and analysis device and method. The present invention has a reasonable structure and can stably install the three-component microseismic sensor 100 in the test well. At the same time, it has excellent recyclability and can be stably taken out from the test well after use. This greatly promotes the secondary utilization of the device, effectively reduces production costs, and significantly improves work efficiency.

[0074] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0075] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0076] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and deform the above embodiments within the scope of the present invention.

Claims

1. A microseismic monitoring and analysis device for fracturing in a shale oil and gas well, comprising a three-component microseismic sensor (100), characterized in that: It also includes a material discharging and retrieving assembly (1), wherein the material discharging and retrieving assembly (1) includes: Upper seat (11): the top is connected to the bottom of the external drill rod (300) through an air expansion shaft (200), the bottom is vertically slidably connected to the top of the lower seat (12), and a first spring (114) is fixedly connected to the top of the lower seat (12), and an elastic material blocking mechanism (400) is built in, which is used to block the connecting pipe (111) at the top of the upper seat (11) after the air expansion shaft (200) is separated from the top of the upper seat (11), so as to prevent backfill material from entering the inside of the connecting pipe (111); The lower seat (12) has a guide column (121) evenly threaded on the top and located inside the first spring (114); a support foot (122) evenly threaded on the bottom and located outside a three-component microseismic sensor (100) threadedly connected to the center of the bottom of the lower seat (12); an elastic support slider (123) evenly slidably connected on the surface; a positioning cartridge (124) evenly threaded on the inner bottom wall and corresponding to the position of the guide column (121); a first slot (1241) and a second slot (1242) are symmetrically provided on the surface of the positioning cartridge (124), and are arranged up and down; A driving rod (13): vertically slidably connected to the inner walls of the guide column (121) and the positioning clamp (124), the top end of which passes through the outside of the guide column (121) and is threadedly connected to the bottom of the upper seat (11), wherein the end surface is provided with a second positioning groove (131), a vertical portion (132) and a first positioning groove (133) in sequence from top to bottom in the vertical direction, the second positioning groove (131) and the first positioning groove (133) are respectively clamped and fixed to one end of the elastic support slider (123) that passes through the interior of the lower seat (12), the vertical portion (132) is abutted and connected to one end of the elastic support slider (123) that passes through the interior of the lower seat (12), and the lower end surface is symmetrically provided with conical elastic clamps (134), which are respectively clamped and fixed to the first clamping groove (1241) and the second clamping groove (1242).

2. The microseismic monitoring and analysis device for fracturing in shale oil and gas wells according to claim 1, characterized in that: The elastic material blocking mechanism (400) comprises a conical material guiding seat (401) fixedly connected to the inner bottom wall of the upper seat (11); a column groove (402) is provided at the top center of the conical material guiding seat (401); and a blocking column rod (403) is vertically slidably connected to the inner wall of the column groove (402); a compression spring (404) is fixedly connected between the blocking column rod (403) and the inner bottom wall of the column groove (402); one end of the blocking column rod (403) passes through the outside of the connecting tube (111); and the top of the blocking column rod (403) is conical.

3. The microseismic monitoring and analysis device for fracturing in shale oil and gas wells according to claim 2 is characterized in that: A material discharge groove (112) is provided on the surface of the upper seat (11), and a cover plate (113) is clamped and fixed to the inner wall of the material discharge groove (112); A connecting column (115) and a connecting cylinder (1211) are respectively arranged at positions corresponding to the bottom of the upper seat (11) and the top of the lower seat (12); the connecting column (115) is located inside the connecting cylinder (1211) and is slidably connected to the inner wall of the connecting cylinder (1211); a limiting block and a limiting groove are respectively arranged on the surface of the connecting column (115) and at positions corresponding to the inner wall of the connecting cylinder (1211); the limiting block is vertically slidably connected to the inner wall of the limiting groove.

4. The microseismic monitoring and analysis device for fracturing in shale oil and gas wells according to claim 3 is characterized in that: A pressure sensor (1212) is fixedly connected to the inner bottom wall of the connecting cylinder (1211), and a rubber seat (116) is provided at the bottom of the connecting column (115) and is in contact with the pressure sensor (1212).

5. The microseismic monitoring and analysis device for fracturing in shale oil and gas wells according to claim 1, characterized in that: The elastic support slider (123) comprises an arc-shaped support slider (1231), a conical transmission rod (1232) and a return spring (1233); an arc-shaped groove (1213) is provided on the surface of the lower seat (12) at a position corresponding to the position of the arc-shaped support slider (1231); the arc-shaped support slider (1231) is slidably connected to the inner wall of the arc-shaped groove (1213); the conical transmission rod (1232) is slidably connected to the inner wall of the lower seat (12) and is in contact with the lower seat (12). A return spring (1233) is fixedly connected between the inner walls; one end of the conical transmission rod (1232) is connected to the driving rod (13); the other end of the conical transmission rod (1232) passes through the arc-shaped slot (1213) and is fixedly connected to the surface of the arc-shaped support slider (1231); the outer surface of the arc-shaped support slider (1231) and the outer surface of the lower seat (12) are in the same plane; and the outer surface of the arc-shaped support slider (1231) is integrally formed with anti-slip grooves.

6. The microseismic monitoring and analysis device for fracturing in shale oil and gas wells according to claim 5, characterized in that: The conical transmission rod (1232) passes through the arc-shaped slot (1213) and is rotatably connected to the threaded screw (12321) on one end surface thereof; the arc-shaped supporting slider (1231) is threadably connected to the outer surface of the threaded screw (12321) and is horizontally slidably connected to the outer surface of the conical transmission rod (1232).

7. The microseismic monitoring and analysis device for fracturing in shale oil and gas wells according to claim 1, characterized in that: The material discharging and picking assembly (1) is made of stainless steel, and the first spring (114), the guide column (121), the support foot (122), the elastic support slider (123), the positioning cartridge (124) and the driving rod (13) are equal in number, and the number is set to be at least four groups.

8. The microseismic monitoring and analysis device for fracturing in shale oil and gas wells according to claim 1, characterized in that: It also includes a reset device (14), the reset device (14) including an upper reset mechanism (141) and a lower reset mechanism (142), the upper reset mechanism (141) and the lower reset mechanism (142) being arranged at the top of the lower seat (12) and the bottom of the lower seat (12), respectively; The upper reset mechanism (141) comprises an upper ring (1411), a second spring (1412), a conical column rod (1413) and a conical groove (1414); the upper ring (1411) is vertically slidably connected to the top of the lower seat (12), and the second spring (1412) is fixedly connected to the top of the lower seat (12); the conical column rod (1413) is vertically slidably connected to the inner wall of the lower seat (12), and is fixedly connected to the surface of one end of the upper ring (1411) penetrating into the interior of the lower seat (12); the conical groove (1414) is provided on the surface of the arc-shaped supporting slider (1231) and corresponds to the position of the conical column rod (1413); one end of the conical column rod (1413) is slidably connected to the inner wall of the conical groove (1414); The lower reset mechanism (142) comprises a lower ring (1421), a third spring (1422) and a compression sleeve (1423); the lower ring (1421) is vertically slidably connected to the bottom of the lower seat (12), and the third spring (1422) is fixedly connected to the bottom of the lower seat (12); the compression sleeve (1423) is vertically slidably connected to the outer surface of the positioning cartridge (124), and is fixedly connected to the surface of one end of the lower ring (1421) that penetrates into the interior of the lower seat (12).

9. A method for using a microseismic monitoring and analysis device for fracturing in a shale oil and gas well, characterized in that: A microseismic monitoring and analysis device for fracturing in a shale oil and gas well as claimed in any one of claims 1 to 8 comprises the following steps: S1: Preparation of test well: Select a suitable location around the fracturing well to drill to create a test well. When the test well is drilled to the predetermined depth, thoroughly clean the debris in the well to ensure the cleanliness of the well environment; S2: Installation and lowering of the device: First, the gas expansion shaft (200) is firmly installed on the bottom of the external drill rod (300), and then the upper seat (11) is installed on the gas expansion shaft (200) to ensure a stable connection. Finally, the three-component microseismic sensor (100) is installed on the bottom of the lower seat (12) to complete the assembly of the main components. Using the external drill rod (300) as a guide, the entire device is slowly placed into the test well until it reaches a predetermined monitoring depth; S3: Fixing and separating the device: When the support foot (122) contacts the bottom of the test well and is inserted into the soil, the position of the lower seat (12) is initially fixed. At this time, the upper seat (11) continues to move downward under the drive of the external drill rod (300) until the conical elastic clamp (134) is tightly engaged with the first clamping groove (1241) to achieve further fixation. During this process, the first positioning groove (133) squeezes the elastic support slider (123) so that one end of the elastic support slider extends out of the lower seat (12) and is in close contact with the inner wall of the test well, thereby ensuring the stable position of the lower seat (12). When the conical elastic clamp (134) is firmly engaged with the first clamping groove (1241), the vertical portion (132) maintains a stable contact connection with the elastic support slider (123) to ensure constant support force. The gas expansion shaft (200) is fixed, and then the gas expansion shaft (200) is separated from the upper seat (11) and taken out of the test well through the external drill rod (300). When the device needs to be taken out, the gas expansion shaft (200) is driven by the external drill rod (300) to descend into the inside of the connecting pipe (111), and the gas expansion shaft (200) is started to be fixed to the connecting pipe (111). Then, the external drill rod (300) is controlled to descend, driving the driving rod (13) to descend synchronously until the conical elastic clamp (134) is clamped and fixed with the second clamping groove (1242). During this process, one end of the elastic support slider (123) moves from the vertical portion (132) to the position of the second positioning groove (131) to achieve reset. Finally, the entire device can be smoothly taken out of the test well by lifting the external drill rod (300).

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