Testing equipment for measuring seismic source energy and wave field of seismic while drilling

Abstract

The utility model discloses a while-drilling earthquake source energy and wave field measurement test device, which relates to the technical field of well drilling data experiment equipment and comprises a support component, the support component comprises a shaft upper cover, a wellhead four-way joint and a shaft which are sequentially connected through flanges, and a well inner cavity is formed. The detection assembly comprises a rock sample box connected with the shaft and an impact force detector located below the rock sample box, a rock sample capable of sliding relative to the rock sample box is arranged in the rock sample box, a cushion block making contact with the rock sample is arranged at the bottom of the rock sample box, and the rock sample acts on the impact force detector through the cushion block. The rock sample box is internally provided with a plurality of ground wave detectors in contact with the rock sample, the ground drilling assembly comprises a drill bit, the drill bit is used for impacting the rock sample, the problems that a lot of time needs to be spent on finding a proper well position and the cost is high when a field experiment is carried out in reality are solved, and by applying the device, the non-timeliness of the field experiment and the experiment cost are greatly saved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling data experimental equipment, and more specifically, to a test equipment for measuring the energy and wave field of a seismic source while drilling. Background Technique

[0002] Seismic exploration is the most important and effective method for solving oil and gas exploration problems in geophysical exploration. It is an important means for prospecting oil and gas resources before drilling. It refers to the method of using the elastic waves caused by artificial excitation, taking advantage of the differences in the elasticity and density of underground media, and inferring the properties and shapes of underground rock formations by observing and analyzing the propagation laws of seismic waves generated by artificial earthquakes underground.

[0003] Due to the limitations of existing technical means, the formation data obtained by surface seismic and surface geophone detection often differ greatly from the formation parameters during actual drilling. It cannot objectively reflect the formation pressure and formation distribution in front of the drill bit. Therefore, the seismic-while-drilling method has been gradually developed to facilitate real-time understanding of the formation conditions around the wellbore and in front of the drill bit, real-time grasping of the relative position between the drill bit and the target layer, ensuring that the drilling trajectory does not deviate from the target layer, and timely avoiding downhole accidents caused by suddenly opening abnormally high-pressure layers. Therefore, it is particularly important to continuously grasp various geological parameters of the underground formation and understand the relative position relationship between the drill bit and the target layer while drilling.

[0004] There are currently two methods for seismic while drilling. One is to use conventional surface seismic sources such as explosives and air guns, and use seismic wave sensors integrated on downhole drilling tools to record and obtain seismic wave data. However, it is still in the research and development and experimental stages. The disadvantage of this technology is that the data collected by the geophones can only be stored in the downhole geophones first and cannot be processed in real time. Another method is to use the vibration energy generated during the drilling of the drill bit as the seismic source and use surface seismic geophones to record the seismic wave signals propagating through the formation. However, the problem of weak vibration energy of the drill bit and low signal-to-noise ratio is particularly prominent, especially when encountering soft rock formations, the signal is very weak. Another method of seismic while drilling is to install a reliable high-energy shock seismic source in the drill string near the drill bit underground and arrange geophones on the ground. In this way, the seismic waves collected on the ground can be processed in real time, quickly grasping the reservoir properties and formation pressure conditions at the front end of the drill bit. However, the implementation of this technology is difficult, and there are no mature development precedents at home and abroad. However, the effect of this technology is prominent, which will be a revolutionary leap for oil and gas exploration. Once it can be maturely applied, it will replace the existing LWD measurement technology and have more accurate advance exploration, and the detection cost is much lower than the existing LWD technology. However, since it cannot achieve precise millisecond-level timing control like the surface seismic source, first of all, a full-scale simulation test on the ground needs to be carried out to obtain the wave field test data of the seismic source under different frequencies and energies. However, there is currently no test device for the full-scale simulation test.

[0005] In summary, how to provide a device capable of performing a full-scale simulation test is an urgent problem for those skilled in the art at present. Utility Model Content

[0006] In view of this, the purpose of the present utility model is to provide a test device for measuring the energy and wave field of a seismic while drilling source, which can realize a full-scale simulation experiment and greatly reduce the experimental difficulty and cost of data acquisition for seismic while drilling.

[0007] In order to achieve the above purpose, the present utility model provides the following technical solutions:

[0008] A test device for measuring the energy and wave field of a seismic while drilling source, comprising:

[0009] A support assembly, the support assembly includes a wellbore upper cover, a wellhead cross and a wellbore connected in sequence through flanges, and a well inner cavity is formed;

[0010] Detection assembly, the detection assembly includes a rock sample box connected to the wellbore, an impact force detector located below the rock sample box, a rock sample that can slide relative to the rock sample box is arranged inside the rock sample box, a cushion block in contact with the rock sample is arranged at the bottom of the rock sample box, the rock sample acts on the impact force detector through the cushion block, and a plurality of ground wave detectors in contact with the rock sample are arranged inside the rock sample box;

[0011] Drilling assembly, the drilling assembly includes a drill bit, and the drill bit is used to impact the rock sample.

[0012] Further, the drilling assembly of the present utility model further includes:

[0013] Drill pipe, located inside the well cavity;

[0014] Drill string vibration source, located inside the well cavity and connected to the drill pipe;

[0015] The drill bit is connected to one end of the drill string vibration source away from the drill pipe.

[0016] Further, the drill bit is provided with a water outlet hole communicating with the well cavity, and the drill pipe, the drill string vibration source and the drill bit are all hollow and form a vibration source cavity;

[0017] A connecting pipe is hermetically installed on the upper cover of the wellbore, a water inlet pipe is connected to one end of the connecting pipe extending out of the well cavity, and the other end of the connecting pipe is connected to the drill pipe.

[0018] Further, the rock sample box is flange-connected with a box cover, and the wellbore is flange-connected with the box cover.

[0019] Further, the rock sample is of a cuboid structure, and the rock sample box is of a structure similar to the rock sample.

[0020] Further, a plurality of slot holes equal in number to the ground wave detectors are formed in the rock sample, the slot holes are used to place the ground wave detectors, and a plurality of wire passing holes are formed in the box cover.

[0021] Further, the detection assembly further includes:

[0022] Lower connecting pipe, the lower connecting pipe is of a flange structure with the rock sample box and communicates with the rock sample box;

[0023] An anvil is slidably installed inside the lower connecting pipe, one end of the anvil extends out of the lower connecting pipe and contacts the impact force detector, and the vibration of the rock sample can drive the anvil to act on the impact force detector.

[0024] Further, an anti - detachment protrusion is provided at one end of the anvil close to the rock sample.

[0025] Further, the detection assembly further includes:

[0026] A support plate, and the support plate is located below the impact force detector.

[0027] Further, an extension pipe is provided below the rock sample box. The lower connection pipe is connected to the extension pipe. The cushion block is slidably installed inside the extension pipe. One side of the cushion block away from the rock sample contacts the anvil, and a baffle is provided on the side of the cushion block contacting the rock sample.

[0028] Further, a sealing ring is installed at the contact position between the lower connection pipe and the anvil.

[0029] Further, the support assembly further includes:

[0030] A wellbore support, and the wellbore support is sleeved outside the wellbore and connected to the wellhead four - way;

[0031] A derrick for supporting the wellbore support, and the wellbore support is connected to the derrick.

[0032] A kind of measurement test equipment for the energy and wave field of the seismic source while drilling provided by the present utility model, when in use, the wellbore upper cover, the wellhead four - way and the wellbore are connected by flanges, and the inner holes of the wellbore upper cover, the wellhead four - way and the wellbore are interconnected to form a well inner cavity. The detection assembly includes a rock sample box connected to the wellbore. Inside the rock sample box, there is a rock sample that can slide relative to the rock sample box. At the bottom of the rock sample box, there is a cushion block contacting the rock sample. The rock sample acts on the impact force detector through the cushion block. Inside the rock sample box, there are several ground - wave detectors contacting the rock sample. At the same time, the drilling component includes a drill bit, and the drill bit is used to impact the rock sample. That is to say, the drill bit impacts the rock sample, and the data is displayed and recorded through several ground - wave detectors and the impact force detector, and the data is summarized and analyzed to understand the maximum depth of the earthquake generated by the seismic source while drilling, the relationship between the shock energy, shock frequency of the seismic source and the seismic waveform, laying a solid foundation for subsequent seismic source improvement and on - site actual downhole application while drilling, solving the problems of spending a lot of time finding a suitable well position and high cost in real - world on - site experiments. Applying this utility model device greatly saves the untimely nature of on - site experiments and experimental costs.

[0033] A usage method provided by the present utility model is used for the use of the measurement test equipment for the energy and wave field of the seismic source while drilling described in any one of the above. Description of the Drawings

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0035] Figure 1 It is a schematic structural diagram of the whole assembled device provided by the present invention;

[0036] Figure 2 It is a schematic structural diagram of the front of the whole assembled device provided by the present invention;

[0037] Figure 3 It is a schematic structural diagram of the internal section after the whole device provided by the present invention is assembled;

[0038] Figure 4 It is a schematic structural diagram of a part of the support assembly provided by the present invention;

[0039] Figure 5 It is a schematic structural diagram of a part of the detection assembly provided by the present invention;

[0040] Figure 6 It is a schematic flow chart of the method used in the present invention.

[0041] Figures 1 - 6 Among them, the reference numerals include:

[0042] 1. Support assembly; 102. Wellhead four-way; 103. Wellbore; 104. Well inner cavity; 105. Connecting pipe; 106. Water inlet pipe; 107. Wellbore support; 108. Derrick; 2. Detection assembly; 201. Rock sample box; 202. Impact force detector; 203. Rock sample; 204. Pad; 205. Ground wave detector; 206. Box cover; 207. Slot hole; 208. Wire passing hole; 209. Lower connecting pipe; 210. Anvil; 211. Anti-detachment protrusion; 212. Baffle; 213. Extension pipe; 214. Sealing ring; 215. Support plate; 3. Earth boring assembly; 301. Drill bit; 302. Drill pipe; 303. Drill string vibration source; 304. Vibration source cavity. Detailed implementation manners

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0044] The core of the present utility model is to provide a test device for measuring the energy and wave field of a seismic source while drilling, which can realize full simulation experiments and greatly reduce the experimental difficulty and cost of seismic data acquisition while drilling.

[0045] Please refer to Figures 1 - 6 , a test device for measuring the energy and wave field of a seismic source while drilling, including a support assembly 1, a detection assembly 2 and a drilling assembly 3. The support assembly 1 includes a wellbore upper cover 101, a wellhead cross 102 and a wellbore 103 connected in sequence through flanges, and a well inner cavity 104 is formed. The detection assembly 2 includes a rock sample box 201 connected to the wellbore 103. Inside the rock sample box 201, there is a rock sample 203 that can slide relative to the rock sample box 201. At the bottom of the rock sample box 201, there is a cushion block 204 in contact with the rock sample 203. The rock sample 203 acts on the impact force detector 202 through the cushion block 204. Inside the rock sample box 201, there are several ground wave detectors 205 in contact with the rock sample 203. The drilling assembly 3 includes a drill bit 301, and the drill bit 301 is used to impact the rock sample 203.

[0046] It should be noted that the specific shapes of the rock sample 203 and the rock sample box 201 are not limited in the embodiments of the present utility model. In some embodiments, the rock sample 203 and the rock sample box 201 can adopt a matching cylindrical structure, a cuboid structure or a polygonal structure. Among them, adopting a polygonal structure or a cuboid structure is beneficial to avoid the angle change of the rock sample 203 during the experiment.

[0047] In addition, the wellhead cross 102 in the embodiments of the present utility model is specifically a connecting pipe 105 structure of a cross, that is, both ends of the main pipe are connected between the wellbore upper cover 101 and the wellbore 103, and there are two water outlets on the main pipe.

[0048] In other embodiments, the wellhead cross 102 can also be replaced with a tee structure, that is, one water outlet, or a multi-way structure, and the appropriate wellhead cross 102 structure is specifically replaced according to the experimental needs.

[0049] In addition, the driving method of the drill bit 301 in the embodiments of the present utility model is not limited. In some embodiments, the drill bit 301 can be vibrated through a pure mechanical structure to complete the work of the required vibration source. In other embodiments, water can be used as the power source to make the drill bit 301 vibrate and complete the work of the required vibration source.

[0050] In addition, in the embodiments of the present utility model, by setting a support rod or other structures at the bottom of the rock sample 203, the rock sample 203 directly acts on the impact force sensor, avoiding relative fixation between it and the experimental device, so as to improve the accuracy of the impact force data.

[0051] During use, the upper cover 101 of the wellbore, the wellhead four-way 102 and the wellbore 103 are connected by flanges, and the inner holes of the upper cover 101 of the wellbore, the wellhead four-way 102 and the wellbore 103 are interconnected to form a well inner cavity 104. The detection assembly 2 includes a rock sample box 201 connected to the wellbore 103. Inside the rock sample box 201, there is a rock sample 203 that can slide relative to the rock sample box 201. At the bottom of the rock sample box 201, there is a cushion block 204 in contact with the rock sample 203. The rock sample 203 acts on the impact force detector 202 through the cushion block 204. Inside the rock sample box 201, there are several ground wave detectors 205 in contact with the rock sample 203. At the same time, the earth boring assembly 3 includes a drill bit 301. The drill bit 301 is used to impact the rock sample 203. That is to say, the drill bit 301 impacts the rock sample 203, and the data is displayed and recorded by several ground wave detectors 205 and the impact force detector 202. The data is summarized and analyzed to understand the maximum depth of the earthquake generated by the downhole seismic source, the relationship between the shock energy, shock frequency of the seismic source and the seismic waveform, laying a solid foundation for subsequent seismic source improvement and on-site actual downhole application while drilling, solving the problems of spending a lot of time finding a suitable well position and high cost in actual on-site experiments. Applying this utility model device greatly saves the untimely nature of on-site experiments and the experimental cost.

[0052] Please refer to Figures 1 - 6, in some embodiments, the earth boring assembly 3 further includes a drill pipe 302 and a drill string vibration source 303. The drill pipe 302 is located inside the well cavity 104, and the drill string vibration source 303 is located inside the well cavity 104 and is connected to the drill pipe 302. The drill bit 301 is connected to one end of the drill string vibration source 303 away from the drill pipe 302. Specifically, the drill string vibration source 303 is a rod-shaped structure and is hollow, and is used to connect the drill bit 301 and the drill pipe 302. The drill bit 301 is provided with a water outlet hole communicating with the well cavity 104. The drill pipe 302, the vibration source while drilling, and the drill bit 301 are all hollow and form a vibration source cavity 304. A connecting pipe 105 is hermetically installed on the wellbore upper cover 101. One end of the connecting pipe 105 extending out of the well cavity 104 is connected to a water inlet pipe 106, and the other end of the connecting pipe 105 is connected to the drill pipe 302. That is to say, the water inlet pipe 106, the connecting pipe 105, the drill pipe 302, the drill string vibration source 303, and the drill bit 301 form a mutually communicating vibration source cavity 304. The wellbore upper cover 101, the wellhead cross 102, and the wellbore 103 are connected by flanges to form the well cavity 104. The vibration source cavity 304 communicates with the well cavity 104 only through the water outlet hole on the drill bit 301. By pumping fluid into the water inlet pipe 106 through a water pump, the fluid passes through the water inlet pipe 106, the connecting pipe 105, the drill pipe 302, and the drill string vibration source 303, and finally reaches the drill bit 301. By controlling the pumping pressure and the interval time of the fluid, the vibration purpose of the drill bit 301 is realized, so that the drill bit 301 forms a strong impact force. The fluid enters the inside of the well cavity 104 through the water outlet hole of the drill bit 301 and is finally discharged through the water outlet of the wellhead cross 102, thus forming a fluid cycle. Using fluid can easily adjust the flow rate of the pumped fluid, detect the relationship between the shock energy, frequency, and seismic waves generated by the vibration source while drilling at different fluid flow rates, which is beneficial to improving the convenience of the experimental process and at the same time reducing the cost of replacing experimental equipment for different experimental scenarios.

[0053] It should be noted that water can be used as the fluid in the embodiments of the present invention. On the one hand, the fluidity of water is relatively strong, which is beneficial to forming the impact force of the drill bit 301. On the other hand, the production cost can be further reduced.

[0054] Please refer to Figures 1 - 6 , in order to facilitate the rapid replacement of the rock sample 203 according to the needs of the experiment, in some embodiments, a box cover 206 is flange-connected to the rock sample box 201, and the wellbore 103 is flange-connected to the box cover 206. Specifically, the shape of the lower part of the box cover 206 matches that of the rock sample box 201, and a tubular structure matching the wellbore 103 is provided above the box cover 206, so as to realize the enclosure of the rock sample box 201. At the same time, when replacement is needed, only the bolts connecting the box cover 206 to the wellbore 103 and the rock sample box 201 need to be removed, and then the box cover 206 can be taken off alone, which is beneficial to the rapid replacement of the rock sample 203.

[0055] It should be noted that in the embodiments of the present utility model, the two sides of the box cover 206 connected to the wellbore 103 and the rock sample box 201 adopt flange connections, which is beneficial to improving its sealing performance.

[0056] In some embodiments, the rock sample 203 has a cuboid structure, and the rock sample box 201 has a structure similar to that of the rock sample 203. That is to say, by using a cuboid-shaped rock sample 203, on the one hand, it is convenient for cutting and forming, and on the other hand, it can prevent the rock sample 203 from rotating during the experiment, so that the experiment can proceed smoothly.

[0057] Please refer to Figures 1 - 6 , in order to further improve the accuracy of the detection data, in some embodiments, a number of slot holes 207 are opened on the rock sample 203, the number of which is the same as that of the ground wave detectors 205, for placing the ground wave detectors 205. A number of wire passing holes 208 are provided on the box cover 206. That is to say, slot holes 207 for placing the ground wave detectors 205 are opened on the rock sample 203, and the ground wave detectors 205 are placed inside the rock sample 203, so as to improve the data accuracy. At the same time, the wire passing holes 208 are used to connect it to an external memory through a wire to realize data transmission and storage.

[0058] It should be noted that the embodiments of the present utility model do not limit the opening position of the slot holes 207. In some embodiments, the wire passing holes 208 can be opened at the center position of the rock sample 203, or the wire passing holes 208 can be opened at the edge position of the rock sample 203.

[0059] In addition, the embodiments of the present utility model do not limit the shape of the slot holes 207, which can adopt any shape, such as circular, rectangular or polygonal, frustum-shaped, funnel-shaped or semi-cylindrical.

[0060] Please refer to Figures 1 - 6 , in some embodiments, the detection assembly 2 further includes a lower connecting pipe 209 and an anvil 210. The lower connecting pipe 209 has a flange structure with the rock sample box 201 and is communicated with the rock sample box 201. The anvil 210 is slidably installed inside the lower connecting pipe 209. One end of the anvil 210 extends out of the lower connecting pipe 209 and contacts the impact force detector 202. The vibration of the rock sample 203 can drive the anvil 210 to act on the impact force detector 202. That is to say, the anvil 210 is used for the transmission of the action between the rock sample 203 and the impact force detector 202, and the anvil 210 can also make the vibration of the rock sample 203 more concentrated for transmission, which is beneficial to improving the accuracy of the impact force detection data.

[0061] It should be noted that the shape of the anvil 210 in the embodiments of the present utility model is not limited. In some embodiments, the anvil 210 can be cylindrical, cuboid, or polygonal. It only needs to have a pointed structure at the connection position with the impact force detector 202 to ensure concentrated transmission.

[0062] In addition, a sliding seal is adopted between the anvil 210 and the lower connecting pipe 209 in the embodiments of the present utility model. Specifically, a boss structure can be provided inside the lower connecting pipe 209, and a sealing ring 214 in contact with the anvil 210 is placed inside the boss. A locking cover is installed at the end of the lower connecting pipe 209 to lock the sealing ring 214 inside the boss of the lower connecting pipe 209, thereby improving the sealing effect and preventing fluid from flowing out.

[0063] In addition, in order to prevent the anvil 210 from detaching from the lower connecting pipe 209 in the embodiments of the present utility model, in some embodiments, a limiting protrusion can be provided at one end of the anvil 210 located inside the lower connecting pipe 209 to prevent it from detaching from the lower connecting pipe 209. The limiting protrusion can adopt a disc-shaped structure with a diameter larger than that of the anvil 210 and is integrally formed with the anvil 210.

[0064] Please refer to Figures 1 - 6 , in order to further reduce the deformation of the experimental position caused by the impact of the drill bit 301, the detection assembly 2 further includes a support plate 215. The support plate 215 is located below the impact force detector 202, and the impact force detector 202 is placed on the support plate 215. On the one hand, it supports the impact force detector 202, and on the other hand, it increases the contact area with the experimental ground through the support plate 215 to avoid deformation and affect the experimental results.

[0065] It should be noted that the support plate 215 in the embodiments of the present utility model can be made of rigid materials, such as steel plates, and holes can be opened in the steel plates to reduce the material cost and weight.

[0066] Please refer to Figures 1 - 6 , in order to further improve the accuracy of the experimental results, in some embodiments, an extension pipe 213 is provided below the rock sample box 201. The lower connecting pipe 209 is connected to the extension pipe 213. The spacer 204 is slidably installed inside the extension pipe 213. One side of the spacer 204 away from the rock sample 203 is in contact with the anvil 210, and a baffle 212 is provided on the side of the spacer 204 in contact with the rock sample 203. That is to say, the rock sample 203 is in contact with the spacer 204, so that there is a gap between the rock sample 203 and the bottom of the rock sample box 201. Furthermore, the rock sample 203, the spacer 204, and the anvil 210 form a relatively fixed whole, and a relative movement relationship is formed with the rock sample box 201 and the wellbore 103, thereby reducing the dispersion of the impact force when the drill bit 301 impacts and improving the accuracy of the experimental results.

[0067] It should be noted that the spacer block 204 in the embodiments of the present utility model can be made of a hard material, such as steel, ceramic material, etc.

[0068] In addition, in the embodiments of the present utility model, the spacer block 204, the anvil 210, and the rock sample 203 are all located on the same center line to ensure that the force is concentrated.

[0069] In addition, the baffle 212 in the embodiments of the present utility model can adopt a disc-shaped structure to increase the contact area with the rock sample 203. At the same time, the baffle 212 and the spacer block 204 are integrally formed, or are fixedly connected by means of bolts, riveting, etc.

[0070] Please refer to Figures 1 - 6 , in order to facilitate the disassembly of the experimental device and the replacement of components, in some embodiments, the support assembly 1 further includes a wellbore support 107 and a derrick 108. The wellbore support 107 is sleeved outside the wellbore 103 and is connected to the wellhead four-way 102. The derrick 108 is used to support the wellbore support 107 for the wellbore 103. The wellbore support 107 is connected to the derrick 108. That is to say, during the experiment, the entire device is fixed through the fixed connection between the wellbore support 107 and the derrick 108, including the wellhead four-way 102, the wellbore 103, and the rock sample box 201. When disassembly is required, only the wellbore support 107 needs to be disassembled to achieve the segmentation of the experimental equipment, quickly replace the components, and at the same time, it is also more convenient for transportation.

[0071] It should be noted that the derrick 108 in the embodiments of the present utility model refers to the support frame structure for supporting the entire experimental equipment, and it can be a welded frame.

[0072] That is to say, the key point of the embodiment of the present utility model lies in that: the wellbore upper cover 101, the wellhead four-way 102 and the wellbore 103 are connected by flanges, and the inner holes of the wellbore upper cover 101, the wellhead four-way 102 and the wellbore 103 are interconnected to form a well inner cavity 104. The detection assembly 2 includes a rock sample box 201 connected to the wellbore 103. Inside the rock sample box 201, there is a rock sample 203 that can slide relative to the rock sample box 201. At the bottom of the rock sample box 201, there is a cushion block 204 in contact with the rock sample 203. The rock sample 203 acts on the impact force detector 202 through the cushion block 204. Inside the rock sample box 201, there are several ground wave detectors 205 in contact with the rock sample 203. At the same time, the drilling component 3 includes a drill bit 301. The drill bit 301 is used to impact the rock sample 203. That is to say, the drill bit 301 impacts the rock sample 203, and the data is displayed and recorded by several ground wave detectors 205 and the impact force detector 202. The data is summarized and analyzed to understand the maximum depth of the earthquake generated by the downhole seismic source, the relationship between the shock energy, shock frequency of the seismic source and the seismic waveform, laying a solid foundation for the subsequent improvement of the seismic source and the actual downhole application on site, solving the problems of spending a lot of time finding a suitable well position and high cost in the actual on-site experiment. Applying this utility model device greatly saves the untimely nature of the on-site experiment and the experimental cost.

[0073] A usage method for the use of the above downhole seismic source energy and wave field measurement test equipment, the method comprising the following steps:

[0074] S1, Prepare the rock sample 203 to be detected, cut it and place it inside the rock sample box 201;

[0075] S2, Assemble the equipment and detect the sealing of each connection of the equipment;

[0076] S3, Connect the water inlet pipe 106 to the water pump, connect the water outlet of the wellhead four-way 102 to the fluid pool, and pump the required fluid into the seismic source cavity 304 through the water pump to make the drill bit 301 vibrate and act on the rock sample 203;

[0077] S4, Record the data of the ground wave detector 205 and the data of the impact force sensor respectively through the memory;

[0078] S5, Replace the rock sample 203 and return to step S2.

[0079] Specifically, first, prepare the rock sample 203 to be detected. Cut the rock sample 203 that meets the requirements and place it inside the rock sample box 201. Then, assemble the experimental equipment. Specifically, arrange and flange-connect the wellhead four-way 102, the wellbore 103, the wellbore support 107, the box cover 206, and the rock sample box 201, and fix them on the derrick 108. Then, connect the water inlet pipe 106 to the connecting pipe 105. Install the drill pipe 302, the drill string vibration source 303, and the drill bit 301 inside the wellbore 103. Then, install the ground wave detector 205 inside the rock sample box 201 and make it contact with the rock sample 203. Install the cushion block 204 and the anvil 210 in place and make the anvil 210 contact the impact force detector 202. At this time, the assembly of the experimental device is completed. Then, pump the required fluid into the vibration source chamber 304 through a water pump to make the drill bit 301 vibrate and act on the rock sample 203, so that the rock sample 203 is impacted and forms a ground wave. Record the data of the ground wave detector 205 and the data of the impact force sensor respectively through the memory, and then conduct computer analysis and summary. Replace the rock sample 203 and repeat the above steps to repeat the experiment for the purpose of demonstrating the experimental data.

[0080] In addition to the measurement test equipment for the energy and wave field of the seismic source while drilling disclosed in each of the above embodiments, the present invention also provides a use method including the above measurement test equipment for the energy and wave field of the seismic source while drilling. For the structures of other parts of this method, please refer to the prior art and will not be elaborated herein.

[0081] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same and similar parts among the embodiments, reference can be made to each other.

[0082] The above has introduced in detail a measurement test equipment for the energy and wave field of the seismic source while drilling provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An in - drill seismic source energy and wavefield measurement test device, characterized in that Comprising: A support assembly (1), the support assembly (1) includes a wellbore upper cover (101), a wellhead cross (102) and a wellbore (103) connected in sequence by flanges, and a well inner cavity (104) is formed; A detection assembly (2), the detection assembly (2) includes a rock sample box (201) connected to the wellbore (103), an impact force detector (202) located below the rock sample box (201), a rock sample (203) that can slide relative to the rock sample box (201) is arranged inside the rock sample box (201), a cushion block (204) in contact with the rock sample (203) is arranged at the bottom of the rock sample box (201), the rock sample (203) acts on the impact force detector (202) through the cushion block (204), and a plurality of ground wave detectors (205) in contact with the rock sample (203) are arranged inside the rock sample box (201); A ground drilling assembly (3), the ground drilling assembly (3) includes a drill bit (301), and the drill bit (301) is used to impact the rock sample (203).

2. The test equipment for measuring the energy and wave field of a seismic source while drilling according to claim 1, wherein The ground drilling assembly (3) further includes: A drill pipe (302), located inside the well inner cavity (104); A drill string vibration source (303), located inside the well inner cavity (104) and connected to the drill pipe (302); The drill bit (301) is connected to one end of the drill string vibration source (303) far from the drill pipe (302).

3. The test equipment for measuring the energy and wave field of a seismic source while drilling according to claim 2, wherein The drill bit (301) is provided with a water outlet hole communicating with the well inner cavity (104), and the drill pipe (302), the drill string vibration source and the drill bit (301) are all hollow and form a vibration source cavity (304); A connecting pipe (105) is sealed and installed on the wellbore upper cover (101), a water inlet pipe (106) is connected to one end of the connecting pipe (105) extending out of the well inner cavity (104), and the other end of the connecting pipe (105) is connected to the drill pipe (302).

4. The test equipment for measuring the energy and wave field of a seismic source while drilling according to claim 1, characterized in that, The rock sample box (201) is flange-connected with a box cover (206), and the wellbore (103) is flange-connected with the box cover (206).

5. The testing equipment for measuring the energy and wave field of a seismic source while drilling according to claim 4, characterized in that, The rock sample (203) is of a cuboid structure, and the rock sample box (201) is of a structure similar to that of the rock sample (203).

6. The test equipment for measuring the energy and wave field of a seismic source while drilling according to claim 5, characterized in that, A plurality of slot holes (207) with the same number as the ground wave detectors (205) are formed on the rock sample (203), the slot holes (207) are used to place the ground wave detectors (205), and a plurality of wire passing holes (208) are formed on the box cover (206).

7. A test device for measuring the energy and wave field of a seismic source while drilling, according to any one of claims 1-6, characterized in that, The detection assembly (2) further includes: A lower connecting pipe (209), the lower connecting pipe (209) has a flange structure with the rock sample box (201) and is communicated with the rock sample box (201); An anvil (210), slidably installed inside the lower connecting pipe (209), one end of the anvil (210) extends out of the lower connecting pipe (209) and contacts the impact force detector (202), and the vibration of the rock sample (203) can drive the anvil (210) to act on the impact force detector (202).

8. The test equipment for measuring the energy and wave field of a seismic source while drilling according to claim 7, characterized in that, One end of the anvil (210) close to the rock sample (203) is provided with an anti - detachment protrusion (211).

9. The testing device for measuring the energy and wave field of a seismic source while drilling according to claim 7, characterized in that The detection assembly (2) further includes: A support plate (215), and the support plate (215) is located below the impact force detector (202).

10. The test equipment for measuring the energy and wave field of a seismic source while drilling according to claim 9, characterized in that, An extension pipe (213) is provided below the rock sample box (201). The lower connecting pipe (209) is connected to the extension pipe (213). The cushion block (204) is slidably installed inside the extension pipe (213). One side of the cushion block (204) away from the rock sample (203) contacts the anvil (210). A baffle (212) is provided on the side of the cushion block (204) contacting the rock sample (203).

11. The test equipment for measuring the energy and wave field of a seismic source while drilling according to claim 8, characterized in that, A sealing ring (214) is installed at the contact position between the lower connecting pipe (209) and the anvil (210).

12. The test equipment for measuring the energy and wave field of a seismic source while drilling according to claim 1, characterized in that, The support assembly (1) further includes: A wellbore support (107), and the wellbore support (107) is sleeved outside the wellbore (103) and connected to the wellhead four - way (102); A derrick (108) for supporting the wellbore support (107), and the wellbore support (107) is connected to the derrick (108).

Images