A shale gas reservoir carbon isotope measuring device

Abstract

The present application belongs to the technical field of petroleum geology testing, and particularly relates to a shale gas reservoir carbon isotope measuring device, which comprises a mounting frame, a PLC controller and an operation panel are fixedly connected to the left side wall of the mounting frame, a detection cylinder is connected to the upper side wall of the mounting frame, a gas pipe is fixedly communicated with the left side wall of the detection cylinder, two connecting pipes are communicated with the side wall of the gas pipe, and the connecting pipe located on the upper side is communicated with an external inert gas conveying assembly. After the shale gas reservoir sample detection is completed, the measuring device can automatically recycle the waste sample, load the previously prepared new sample into the device, quickly start a new round of detection process, greatly avoid a large amount of air from flowing into the device, only need to convey a small amount of inert gas, can effectively discharge the residual interference gas, at the same time, the design also effectively inhibits the excessive loss of heat in the device, significantly reduces the energy consumption, and avoids the resource waste.

Description

Technical Field

[0001] This invention belongs to the field of petroleum geological testing technology, and in particular relates to a carbon isotope measuring device for shale gas reservoirs. Background Technology

[0002] Shale gas is an unconventional natural gas resource found in the nanopores and fractures within shale formations. It has become a hot topic in the global oil and gas exploration field. In my country, shale gas exploration is mainly concentrated in the Sichuan Basin. Shale gas is mainly found in Paleozoic marine shale. Although terrestrial and marine-continental transitional shale also produces shale, the resource scale is relatively small. Shale gas in the Sichuan Basin is mainly concentrated in the Silurian Longmaxi Formation and the Lower Cambrian Niutitang Formation. The shale gas is dry gas with a methane content of over 95% and a high degree of kerogen evolution. Carbon isotope testing technology is an important technology for petroleum geological testing. For example, a carbon isotope measuring device and method for shale gas reservoirs is proposed in patent publication number CN118425058A.

[0003] When the existing measuring device is in operation, the operator must first place the sample to be tested inside the device, and then introduce inert gas into the device to drive away interfering gases. Because shale gas exploration and development work has many needs, such as analyzing the genesis of shale gas, assessing the amount of shale gas resources, and guiding the drilling direction of horizontal wells, the measuring device must conduct tests on samples at different depths in sequence. However, every time the operator opens the device to change the sample, a large amount of air will rush into the device. As a result, not only must inert gas be introduced again to recreate the environment, but the heat inside the device will also be lost. Subsequently, a large amount of energy needs to be consumed to reheat the device, resulting in a significant waste of resources.

[0004] To address this issue, a carbon isotope measurement device for shale gas reservoirs is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a carbon isotope measurement device for shale gas reservoirs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a carbon isotope measuring device for shale gas reservoirs, comprising a mounting frame, a PLC controller and an operation panel fixedly connected to the left side wall of the mounting frame, a detection cylinder connected to the upper side wall of the mounting frame, a vent pipe fixedly connected to the left side wall of the detection cylinder, two connecting pipes connected to the side wall of the vent pipe, the upper connecting pipe connected to an external inert gas delivery assembly, and the lower connecting pipe connected to an external oxygen delivery assembly; a placement plate fixedly connected to the inner wall of the mounting frame, an isotope spectrometer fixedly connected to the upper side wall of the placement plate, the detection end of the isotope spectrometer connected to the detection cylinder, and further comprising: A feeding assembly, located on the upper side wall of the mounting frame, is used to feed sample raw materials into the detection cylinder; A processing component, located inside the detection cylinder, is used for processing sample raw materials; A recycling component, disposed on the upper sidewall of the placement plate, is used for the recycling of waste samples; A display component, located on the upper side wall of the mounting bracket, is used to display the detection results of the isotope spectrometer.

[0007] Preferably, the feeding assembly includes a lead screw linear module, which is fixedly connected to the upper side wall of the mounting frame via a bracket. A moving rod is fixedly connected to the moving end of the lead screw linear module. Multiple connecting cylinders are fixedly connected to the front side wall of the moving rod. A feeding cylinder is fixedly connected to the front end of each connecting cylinder. An exhaust pipe is fixedly connected to the upper side wall of each connecting cylinder. An exhaust valve and a gas detection sensor are provided inside the exhaust pipe. A mesh plate is connected to the rear inner wall of the feeding cylinder via a horizontal electric push rod. A sample is placed in front of the mesh plate. Vertical electric push rods are fixedly connected to both the left and right sides of the feeding cylinder. The upper ends of the two vertical electric push rods are fixedly connected to the same baffle via a bracket.

[0008] Preferably, the processing assembly includes rope frames fixedly connected to the inner walls of the front and rear sides of the detection cylinder. A control motor is fixedly connected to each of the front and rear side walls of the detection cylinder. The output end of the control motor is located inside the rope frame and fixedly connected to a rope pulley. Cables are wound around both rope pulleys. The lower ends of both cables pass through the rope cylinder and are fixedly connected to vertical plates. Rotating rods are rotatably connected to the side walls of both vertical plates. A common quartz boat is fixedly connected to one end of each of the two rotating rods. A heating mechanism is provided inside the detection cylinder. A common crushing funnel is fixedly connected to one side wall of each of the two rope frames. A hydraulic cylinder is fixedly connected to the upper inner wall of the detection cylinder. A crushing motor is fixedly connected to the moving end of the hydraulic cylinder. A crushing head that matches the crushing funnel is fixedly connected to the output end of the crushing motor. An inclined tube is fixedly inserted into the rear wall of the detection cylinder. The lower end of the inclined tube communicates with the side wall of the crushing funnel. A control valve is provided inside the inclined tube. The upper end of the inclined tube extends out of the detection cylinder and is fixedly connected to a connecting cover. A bent plate is fixedly connected to the upper wall of the connecting cover. Two laser receivers are fixedly connected to the rear wall of the bent plate. A laser generator is fixedly connected to the upper wall of the feeding cylinder.

[0009] Preferably, the recycling assembly includes two recycling motors fixedly connected to the front and rear side walls of the detection cylinder. The output ends of the two recycling motors pass through the detection cylinder and are fixedly connected to a drive shaft. A drive gear is fixedly sleeved on the rod wall of the drive shaft. A reversing gear that meshes with the drive gear is fixedly connected to the ends of the two rotating rods that are far apart from each other. A recycling box is connected to the upper side wall of the placement plate. The lower end of the detection cylinder communicates with the upper side wall of the recycling box. A magnetic control valve is provided in the detection cylinder near the interior of the recycling box.

[0010] Preferably, each display component includes two base boxes, both of which are fixedly connected to the upper side wall of the mounting frame. Both base boxes are connected to the air supply component. Multiple short pipes are fixedly connected to the upper side walls of both base boxes, and each short pipe contains a control valve. A square tube is fixedly connected to the upper end of each short pipe. A piston plate is slidably disposed within the square tube. A stop block located below the piston plate is fixedly connected to the inner wall of the square tube. A U-shaped rod is fixedly connected to the upper side wall of the piston plate. The end of the U-shaped rod away from the piston plate extends out of the square tube and is fixedly connected to a rope drum. The same display rope is inserted into multiple rope drums. A scale is provided on the outer side wall of the square tube. A guide is fixedly connected to the lower side wall of the rope drum. A conductive frame is fixedly connected to the upper side wall of the piston plate. The conductive frame is electrically connected to the PLC controller. Multiple conductive plates are embedded in the inner wall of the square tube. A positioning groove is formed on the side wall of the piston plate, and a friction plate is fixedly connected to the inner wall of the positioning groove via a positioning electric push rod.

[0011] Preferably, the air supply assembly includes a fixed plate fixedly connected to the right side wall of the mounting frame, an air supply cylinder fixedly connected to the upper side wall of the fixed plate, a piston seat connected to the lower inner wall of the air supply cylinder by a spring, a common air inlet pipe fixedly connecting the air supply cylinder and the detection cylinder, a first regulating valve provided in the air inlet pipe, a bend pipe fixedly connected to the upper side wall of the air supply cylinder, a second regulating valve provided in the bend pipe, and the bend plate connected to two bottom boxes respectively through two air supply pipes.

[0012] Preferably, the air inlet pipe is provided with an air outlet pipe, the air outlet pipe is provided with a third regulating valve, the bend pipe is provided with a discharge pipe, and the discharge pipe is provided with a fourth regulating valve.

[0013] Preferably, a pressure sensor is connected to the upper side wall of the air supply cylinder, and the pressure sensor is electrically connected to the PLC controller.

[0014] Compared with existing technologies, the advantages of a carbon isotope measurement device for shale gas reservoirs are: With its feeding and recovery components, the measuring device can automatically recover waste samples after completing shale gas reservoir sample testing and load new samples into the device, quickly starting a new round of testing. This greatly avoids a large amount of air entering the device, and only a small amount of inert gas is needed to effectively remove residual interfering gases. At the same time, this design also effectively suppresses excessive heat loss inside the device, significantly reducing energy consumption and avoiding resource waste.

[0015] The processing components can automatically crush shale gas reservoir samples before they are placed on the measuring device for measurement. This increases the sample's heat-receiving area and shortens the heating time, thus improving the efficiency of the measuring device.

[0016] The display components allow for a clear view of the measurement results after the measurement device has been used to measure the sample. This facilitates the recording of measurement results at different depths by operators and enables subsequent analysis of shale gas formation, assessment of shale gas resources, and guidance of horizontal well drilling. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a carbon isotope measuring device for shale gas reservoirs provided by the present invention; Figure 2 This is a schematic diagram of the feeding component in a carbon isotope measuring device for shale gas reservoirs provided by the present invention; Figure 3 This is a schematic diagram of the surface structure of the feed cylinder in a carbon isotope measuring device for shale gas reservoirs provided by the present invention; Figure 4 This is a schematic diagram of the internal structure of the detection cylinder in a carbon isotope measuring device for shale gas reservoirs provided by the present invention; Figure 5 This is a schematic diagram of the docking relationship between the connecting hood and the feeding cylinder in a carbon isotope measuring device for shale gas reservoirs provided by the present invention. Figure 6 This is a schematic diagram of the shape and structure of the bent plate in a carbon isotope measuring device for shale gas reservoirs provided by the present invention; Figure 7 This is a schematic diagram of the internal structure of the square tube in a carbon isotope measuring device for shale gas reservoirs provided by the present invention; Figure 8 This is a schematic diagram of the internal structure of the piston plate in a carbon isotope measuring device for shale gas reservoirs provided by the present invention. Figure 9 This is a schematic diagram of the surface structure of the gas supply cylinder in a carbon isotope measuring device for shale gas reservoirs provided by the present invention; Figure 10 This is a schematic diagram showing the positional relationship between the gas supply cylinder and the piston seat in a carbon isotope measuring device for shale gas reservoirs provided by the present invention.

[0018] In the diagram: 1. Mounting bracket; 2. PLC controller; 3. Operation panel; 4. Detection cylinder; 5. Vent pipe; 6. Connecting pipe; 7. Placement plate; 8. Isotope spectrometer; 9. Feeding assembly; 91. Lead screw linear module; 92. Moving rod; 10. Connecting cylinder; 11. Feeding cylinder; 12. Exhaust pipe; 13. Exhaust valve; 14. Gas detection sensor; 15. Horizontal electric push rod; 16. Mesh plate; 17. Vertical electric push rod; 18. Baffle; 19. Processing assembly; 191. Rope frame; 192. Control motor; 20. Rope pulley; 21. Cable; 22. Vertical plate; 23. Rotating rod; 24. Quartz boat; 25. Heating mechanism; 26. Crushing funnel; 27. Hydraulic cylinder; 28. Crushing motor; 29. ​​Crushing head; 30. Inclined tube; 31. Control valve; 32. Connecting cover; 33. Bending plate; 34. Laser receiver. 35 Laser generator, 36 Recycling assembly, 361 Recycling motor, 362 Drive shaft, 37 Drive gear, 38 Reversing gear, 39 Recycling box, 40 Magnetic control valve, 41 Display assembly, 411 Base box, 412 Short pipe, 42 Control valve, 43 Square tube, 44 Piston plate, 45 Stop block, 46 U-shaped rod, 47 Rope drum, 48 Display rope, 49 Scale, 50 Indicator, 51 Conductive frame, 52 Conductive plate, 53 Positioning electric push rod, 54 Friction plate, 55 Air supply assembly, 551 Fixing plate, 552 Air supply cylinder, 56 Piston seat, 57 Inlet pipe, 58 First regulating valve, 59 Bend, 60 Second regulating valve, 61 Outlet pipe, 62 Third regulating valve, 63 Discharge pipe, 64 Fourth regulating valve, 65 Pressure sensor. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] like Figures 1-10 As shown, a carbon isotope measuring device for shale gas reservoirs includes a mounting frame 1. A PLC controller 2 and an operation panel 3 are fixedly connected to the left side wall of the mounting frame 1. A detection cylinder 4 is connected to the upper side wall of the mounting frame 1. A vent pipe 5 is fixedly connected to the left side wall of the detection cylinder 4. Two connecting pipes 6 are connected to the side wall of the vent pipe 5. The upper connecting pipe 6 is connected to an external inert gas delivery assembly, and the lower connecting pipe 6 is connected to an external oxygen delivery assembly. A placement plate 7 is fixedly connected to the inner wall of the mounting frame 1. An isotope spectrometer 8 is fixedly connected to the upper side wall of the placement plate 7. The detection end of the isotope spectrometer 8 is connected to the detection cylinder 4. The device also includes: The feeding assembly 9, located on the upper side wall of the mounting frame 1, is used to feed sample raw materials into the detection cylinder 4. The feeding assembly 9 includes a lead screw linear module 91, which is fixedly connected to the upper side wall of the mounting frame 1 via a bracket. A moving rod 92 is fixedly connected to the moving end of the lead screw linear module 91. Multiple connecting cylinders 10 are fixedly connected to the front side wall of the moving rod 92. The front end of the connecting cylinder 10 is fixedly connected to a feeding cylinder 11. An exhaust pipe 12 is fixedly connected to the upper side wall of the connecting cylinder 10. An exhaust valve 13 and a gas detection sensor 14 are provided inside the exhaust pipe 12. The rear inner wall of the feeding cylinder 11 is connected via a transverse... The electric push rod 15 is connected to the screen plate 16, and the sample is placed in front of the screen plate 16. Vertical electric push rods 17 are fixedly connected to both sides of the feeding cylinder 11. The upper ends of the two vertical electric push rods 17 are fixedly connected to the same baffle 18 through the bracket, which can load the pre-prepared new sample into the device and quickly start a new round of detection process. This greatly avoids a large amount of air rushing into the device. Only a small amount of inert gas needs to be transported to effectively remove the residual interfering gas. At the same time, this design also effectively suppresses the excessive heat loss inside the device, significantly reduces energy consumption, and avoids resource waste. The processing component 19, located inside the detection cylinder 4, is used for processing sample raw materials. The processing component 19 includes rope frames 191 fixedly connected to the inner walls of the front and rear sides of the detection cylinder 4. Control motors 192 are fixedly connected to both the front and rear side walls of the detection cylinder 4. The output end of the control motor 192 is located inside the rope frames 191 and is fixedly connected to rope pulleys 20. Cables 21 are wound around both rope pulleys 20. The lower ends of both cables 21 pass through the rope cylinder 47 and are fixedly connected to vertical plates 22. Rotating rods 23 are rotatably connected to the side walls of both vertical plates 22. A quartz boat 24 is fixedly connected to one end of each of the two rotating rods 23. A heating mechanism 25 is provided inside the detection cylinder 4. A crushing funnel 26 is fixedly connected to one side wall of each of the two rope frames 191. A hydraulic cylinder 27 is fixedly connected to the upper inner wall of the detection cylinder 4. The moving end of the hydraulic cylinder 27... A crushing motor 28 is fixedly connected, and a crushing head 29 that matches the crushing funnel 26 is fixedly connected to the output end of the crushing motor 28. An inclined tube 30 is fixedly inserted into the rear side wall of the detection tube 4. The lower end of the inclined tube 30 is connected to the side wall of the crushing funnel 26. A control valve 31 is provided inside the inclined tube 30. The upper end of the inclined tube 30 extends out of the detection tube 4 and is fixedly connected to a connecting cover 32. A bent plate 33 is fixedly connected to the upper side wall of the connecting cover 32. Two laser receivers 34 are fixedly connected to the rear side wall of the bent plate 33. A laser generator 35 is fixedly connected to the upper side wall of the feeding tube 11. Before placing the shale gas reservoir sample into the measuring device for measurement, the sample can be automatically crushed. When heating the sample later, the heating area of ​​the sample can be increased, the heating time required for the sample can be shortened, and the working efficiency of the measuring device can be improved. The recovery assembly 36 includes two recovery motors 361 fixedly connected to the front and rear side walls of the detection cylinder 4. The output ends of the two recovery motors 361 pass through the detection cylinder 4 and are fixedly connected to a drive shaft 362. A drive gear 37 is fixedly sleeved on the rod wall of the drive shaft 362. A reversing gear 38 that meshes with the drive gear 37 is fixedly connected to the ends of the two rotating rods 23 that are far apart from each other. A recovery box 39 is connected to the upper side wall of the placement plate 7. The lower end of the detection cylinder 4 communicates with the upper side wall of the recovery box 39. A magnetic control valve 40 is provided in the interior of the detection cylinder 4 near the recovery box 39. After the shale gas reservoir sample is tested, the measuring device can automatically recover the waste sample. Display component 41, located on the upper side wall of mounting frame 1, is used to display the detection results of isotope spectrometer 8. Display component 41 includes two base boxes 411, both fixedly connected to the upper side wall of mounting frame 1. Both base boxes 411 are connected to gas supply component 55. Multiple short pipes 412 are fixedly connected to the upper side wall of each base box 411, and each short pipe 412 contains a regulating valve 42. A square tube 43 is fixedly connected to the upper end of each short pipe 412. A piston plate 44 is slidably disposed within the square tube 43. A stop block 45 located below the piston plate 44 is fixedly connected to the inner wall of the square tube 43. A U-shaped rod 46 is fixedly connected to the upper side wall of the piston plate 44. The end of the U-shaped rod 46 away from the piston plate 44 extends out of the square tube 43 and is fixedly connected to a rope drum 47. Multiple rope drums 47 are connected to the same display rope 48. The outer wall of the square tube 43 is equipped with a scale 49. The lower side wall of the rope drum 47 is fixedly connected to a guide 50. The upper side wall of the piston plate 44 is fixedly connected to a conductive frame 51. The conductive frame 51 is electrically connected to the PLC controller 2. Multiple conductive plates 52 are embedded in the inner wall of the square tube 43. The side wall of the piston plate 44 is provided with a positioning groove, and the inner wall of the positioning groove is fixedly connected to a friction plate 54 through a positioning electric push rod 53. After the sample is measured by the measuring device, the measurement results can be displayed intuitively, which is convenient for operators to record the measurement results of samples at different depths, as well as for subsequent analysis of shale gas genesis, assessment of shale gas resources, and guidance of horizontal well drilling.

[0021] The gas supply assembly 55 includes a fixing plate 551 fixedly connected to the right side wall of the mounting frame 1. A gas supply cylinder 552 is fixedly connected to the upper side wall of the fixing plate 551. A piston seat 56 is connected to the lower inner wall of the gas supply cylinder 552 by a spring. The gas supply cylinder 552 and the detection cylinder 4 are fixedly connected by the same air inlet pipe 57. A first regulating valve 58 is provided in the air inlet pipe 57. A bend pipe 59 is fixedly connected to the upper side wall of the gas supply cylinder 552. A second regulating valve 60 is provided in the bend pipe 59. The bend plate 33 is connected to two bottom boxes 411 through two gas supply pipes respectively, and can supply gas to the two bottom boxes 411.

[0022] An air outlet pipe 61 is provided on the air inlet pipe 57, and a third regulating valve 62 is provided inside the air outlet pipe 61. An exhaust pipe 63 is provided on the bend pipe 59, and a fourth regulating valve 64 is provided inside the exhaust pipe 63, which can discharge the gas inside the detection cylinder 4 and the square tube 43.

[0023] A pressure sensor 65 is connected to the upper side wall of the air supply cylinder 552. The pressure sensor 65 is electrically connected to the PLC controller 2 and can detect the internal air pressure of the air supply cylinder 552.

[0024] The operating principle of this invention is explained as follows: The operator places samples of equal weight into multiple feeding cylinders 11. Then, the operator sends an electrical signal to the PLC controller 2 via the operation panel 3. Upon receiving the signal, the PLC controller 2 controls multiple vertical electric push rods 17 to operate. The vertical electric push rods 17 move the baffle 18 downwards, thus sealing the feeding cylinders 11. Next, the PLC controller 2 controls the lead screw linear module 91 to operate. The lead screw linear module 91, via the moving rod 92, moves multiple feeding cylinders 11 simultaneously to the right. During this rightward movement, the laser generator 35 on the surface of the rightmost feeding cylinder 11 aligns first with the laser receiver 34 on the left. The laser signal emitted by the laser generator 35 is received by the laser receiver 34 on the left, and the laser receiver 34 then transmits the signal through the PLC. The LC controller 2 controls the vertical electric push rods 17 on both sides of the rightmost feeding cylinder 11 to move the baffle 18 on that side upwards immediately, opening the feeding cylinder 11. When the lead screw linear module 91 aligns the rightmost feeding cylinder 11 with the connecting cover 32, the laser signal emitted by the laser generator 35 will be received by the laser receiver 34 on the right. The laser receiver 34 on the right will then control the lead screw linear module 91 to stop working immediately through the PLC controller 2, thereby aligning the connecting cover 32 with the feeding cylinder 11. Then, the PLC controller 2 will control the horizontal electric push rod 15 to work and open the control valve 31. The horizontal electric push rod 15 pushes the rightmost sample through the mesh plate 16, causing the sample to slide through the connecting cover 32 and the inclined tube 30 into the crushing funnel 26 for storage. Subsequently, different samples can be placed into the detection cylinder 4 through the same steps. Next, PLC controller 2 adjusts and closes control valve 31, and controls the external inert gas delivery assembly to work, delivering inert gas to the detection cylinder 4 through the upper connecting pipe 6 and the vent pipe 5. The inert gas will deliver the interfering gas in the detection cylinder 4 to the supply cylinder 552 through the inlet pipe 57. The gas will push the piston seat 56 to move downwards against the spring force below. The pressure sensor 65 detects that the internal pressure of the supply cylinder 552 has reached the set threshold (two standard gas volumes, enough to support all piston plates 44 moving upwards to the highest point). The pressure sensor 65 will then control PLC controller 2 to close the first regulating valve 58 (which is initially in the open state) and control the third regulating valve 62 to open, allowing gas to pass through the outlet. After the exhaust pipe 61 is exhausted, the other gases inside the detection cylinder 4 will be completely cleared out after one minute of exhaust operation (by setting the gas delivery speed of the external inert gas delivery component, all other gases inside the detection cylinder 4 can be discharged within one minute). After the external inert gas delivery component has been working for one minute, the PLC controller 2 will control the third regulating valve 62 to close and control the exhaust valve 13 to open, so that the remaining gas in the feed cylinder 11, the inclined pipe 30 and the other gases in the feed cylinder 11 can be discharged through the exhaust pipe 12. After the gas detection sensor 14 detects that there are no other gases discharged in the exhaust pipe 12, the gas detection sensor 14 will control the exhaust valve 13 to close through the PLC controller 2, thereby optimizing the measurement environment inside the detection cylinder 4. Next, PLC controller 2 controls hydraulic cylinder 27 to move pulverizing head 29 downwards, and controls pulverizing motor 28 to slowly rotate pulverizing head 29. The pulverizing head 29 pulverizes the sample into a suitable size, which then falls through pulverizing funnel 26 into the interior of quartz boat 24. After 30 seconds of pulverization, the sample has been completely pulverized and fallen into quartz boat 24. PLC controller 2 then drives control motor 192 to rotate rope wheel 20, causing the cable 21 on the surface of rope wheel 20 to descend. After control motor 192 operates for two seconds, quartz boat 24 moves into heating mechanism 25. PLC controller 2 first controls the heating device to preheat the sample for two minutes at a temperature lower than the complete decomposition temperature of kerogen. After two minutes of preheating... The PLC controller 2 will control the heating device to heat the sample for the first time at a temperature higher than the complete decomposition temperature of kerogen and lower than the initial decomposition temperature of carbonates. During the heating process, the external oxygen delivery component will deliver a certain amount of oxygen to the detection cylinder 4 to promote the oxidation reaction of the sample. The carbon isotope value of kerogen in the sample can be detected by the isotope spectrometer 8. When the isotope spectrometer 8 cannot detect carbon isotopes, it means that the carbon isotopes of kerogen in the sample have been completely decomposed. The value detected by the isotope spectrometer 8 at this time is the carbon isotope value of kerogen. Based on the detection result, the isotope spectrometer 8 will control the control valve 42 located at the front of the right bottom box 411 to open. At the same time, it will control the control valve 42 located at the front of the right bottom box 411 to open. The conductive plate 52 inside the front square tube 43 is electrically connected to an external power source. When the control valve 42 is opened, the gas inside the air supply cylinder 552, pushed by the piston seat 56 below and the spring force, is delivered through the bend 59 (at this time, the second regulating valve 60 is in the open state), the air supply pipe, and the bottom box 411 on the right side to the front square tube 43. This causes the piston plate 44 inside the square tube 43 to move upward under the action of air pressure. During the upward movement of the piston plate 44, it will drive the conductive frame 51 to move together. When the conductive frame 51 contacts the corresponding conductive plate 52, the conductive frame 51 is electrically connected to the PLC controller 2. The external current signal will be transmitted to the PLC controller 2, and the PLC controller 2 will control the second regulating valve 652. The valve 60 closes (it will open again when gas needs to be delivered next time), and at the same time controls the positioning electric push rod 53 to work. The positioning electric push rod 53 will drive the friction plate 54 to contact the inner wall of the square tube 43. Through the friction between the friction plate 54 and the inner wall of the square tube 43, the position of the piston plate 44 is fixed. As the piston plate 44 moves upward, it will drive the rope drum 47, the display rope 48, and the indicator 50 to move upward to the set position through the U-shaped rod 46. The indicator 50 can guide the approximate carbon isotope value of the sample inside the sample on the scale 49 on the surface of the square tube 43 (the precise value of the carbon isotope value of the sample inside the sample will be displayed on the display screen of the isotope spectrometer 8). After the first heating is completed, the PLC controller 2 controls the heating mechanism 25 to heat at a temperature higher than the complete decomposition temperature of carbonates. The values ​​detected by the isotope spectrometer 8 are the carbonate carbon isotope values ​​in the sample. Based on the above principle, the carbonate carbon isotope values ​​in the sample can be displayed through the rightmost square tube 43 on the rear bottom box 411 (detailed values ​​are still displayed on the display screen of the isotope spectrometer 8). Subsequently, the detected values ​​can be roughly displayed through different square tubes 43 according to different sample depths. At the same time, by positioning the height of the display rope 48, the kerogen carbon isotope values ​​and carbonate carbon isotope values ​​in the sample can be displayed in the form of a broken line, which makes it convenient for operators to intuitively see the differences in kerogen carbon isotope values ​​and carbonate carbon isotope values ​​in samples at different depths. This is to facilitate subsequent analysis of shale gas genesis, assessment of shale gas resource quantity, and guidance of horizontal well drilling directional work. After the sample testing inside the quartz boat 24 is completed, the PLC controller 2 will control the control motors 192 on both sides to control the quartz boat 24 to continue moving downwards to a set distance, so that the flipping gears 38 on both sides fall onto the surface of the drive gears 37 on both sides. Then, the PLC controller 2 controls the recycling motors 361 on both sides to work. The recycling motors 361, through the cooperation of the drive gears 37 and the flipping gears 38, control the rotating rod 23 and the quartz boat 24 to rotate 360 ​​degrees (because a counterweight is set below the vertical plate 22, the stability of the quartz boat 24 is ensured during the rotation of the quartz boat 24). The PLC controller 2 will also control the magnetic valve 40 to open, so that the waste on the surface of the quartz boat 24 falls into the recycling bin 39 for storage, thus recycling the waste.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A carbon isotope measuring device for shale gas reservoirs, comprising a mounting frame (1), wherein a PLC controller (2) and an operation panel (3) are fixedly connected to the left side wall of the mounting frame (1), a detection cylinder (4) is connected to the upper side wall of the mounting frame (1), a vent pipe (5) is fixedly connected to the left side wall of the detection cylinder (4), two connecting pipes (6) are connected to the side wall of the vent pipe (5), the upper connecting pipe (6) is connected to an external inert gas delivery assembly, and the lower connecting pipe (6) is connected to an external oxygen delivery assembly, a placement plate (7) is fixedly connected to the inner wall of the mounting frame (1), an isotope spectrometer (8) is fixedly connected to the upper side wall of the placement plate (7), and the detection end of the isotope spectrometer (8) is connected to the detection cylinder (4), characterized in that, Also includes: The feeding assembly (9) is disposed on the upper side wall of the mounting frame (1) and is used to feed sample raw materials into the detection cylinder (4); A processing component (19) is disposed inside the detection tube (4) for processing sample raw materials; A recycling component (36) is disposed on the upper sidewall of the placement plate (7) for recycling waste samples; Display component (41), disposed on the upper side wall of the mounting bracket (1), is used to display the detection results of the isotope spectrometer (8); The feeding assembly (9) includes a lead screw linear module (91), which is fixedly connected to the upper side wall of the mounting frame (1) by a bracket. A moving rod (92) is fixedly connected to the moving end of the lead screw linear module (91). Multiple connecting cylinders (10) are fixedly connected to the front side wall of the moving rod (92). A feeding cylinder (11) is fixedly connected to the front end of the connecting cylinder (10). An exhaust pipe (12) is fixedly connected to the upper side wall of the connecting cylinder (10). An exhaust valve (13) and a gas detection sensor (14) are provided in the exhaust pipe (12). A mesh plate (16) is connected to the rear inner wall of the feeding cylinder (11) by a horizontal electric push rod (15). A sample is placed in front of the mesh plate (16). Vertical electric push rods (17) are fixedly connected to both the left and right sides of the feeding cylinder (11). The upper ends of the two vertical electric push rods (17) are fixedly connected to the same baffle (18) by a bracket. The processing component (19) includes a rope frame (191) fixedly connected to the inner walls of the front and rear sides of the detection cylinder (4). A control motor (192) is fixedly connected to both the front and rear side walls of the detection cylinder (4). The output end of the control motor (192) is located inside the rope frame (191) and is fixedly connected to a rope wheel (20). Two rope wheels (20) are wrapped with cables (21). The lower ends of the two cables (21) pass through the rope cylinder (47) and are fixedly connected to vertical plates (22). Rotating rods (23) are rotatably connected to the side walls of the two vertical plates (22). The same quartz boat (24) is fixedly connected to one end of each of the two rotating rods (23). A heating mechanism (25) is provided inside the detection cylinder (4). The same crushing funnel (26) is fixedly connected to the side walls of the two rope frames (191) on opposite sides. A hydraulic cylinder (27) is fixedly connected to the upper inner wall of the detection cylinder (4). A crushing motor (28) is fixedly connected to the moving end of the hydraulic cylinder (27). A crushing head (29) that matches the crushing funnel (26) is fixedly connected to the output end of the crushing motor (28). An inclined tube (30) is fixedly inserted into the rear side wall of the detection cylinder (4). The lower end of the inclined tube (30) is connected to the side wall of the crushing funnel (26). A control valve (31) is provided inside the inclined tube (30). The upper end of the inclined tube (30) extends out of the detection cylinder (4) and is fixedly connected to a connecting cover (32). A bent plate (33) is fixedly connected to the upper side wall of the connecting cover (32). Two laser receivers (34) are fixedly connected to the rear side wall of the bent plate (33). A laser generator (35) is fixedly connected to the upper side wall of the feeding cylinder (11).

2. The carbon isotope measuring device for shale gas reservoirs according to claim 1, characterized in that, The recycling assembly (36) includes two recycling motors (361) fixedly connected to the front and rear side walls of the detection cylinder (4). The output ends of the two recycling motors (361) pass through the detection cylinder (4) and are fixedly connected to a drive shaft (362). The rod wall of the drive shaft (362) is fixedly fitted with a drive gear (37). The ends of the two rotating rods (23) that are far apart from each other are fixedly connected to a reversing gear (38) that meshes with the drive gear (37). The upper side wall of the placement plate (7) is connected to a recycling box (39). The lower end of the detection cylinder (4) is connected to the upper side wall of the recycling box (39). A magnetic control valve (40) is provided inside the detection cylinder (4) near the recycling box (39).

3. The carbon isotope measuring device for shale gas reservoirs according to claim 1, characterized in that, Each display component (41) includes two base boxes (411), both base boxes (411) are fixedly connected to the upper side wall of the mounting bracket (1), both base boxes (411) are connected to the air supply component (55), and the upper side wall of each base box (411) is fixedly connected to multiple short pipes (412), and a regulating valve (42) is provided in the short pipe (412). The upper end of the short pipe (412) is fixedly connected to a square tube (43), and a piston plate (44) is slidably arranged in the square tube (43). A stop block (45) located below the piston plate (44) is fixedly connected to the inner wall of the square tube (43), and a U-shaped rod (46) is fixedly connected to the upper side wall of the piston plate (44). The end of the rod (46) away from the piston plate (44) extends out of the square tube (43) and is fixedly connected to the rope drum (47). The same display rope (48) is inserted into multiple rope drums (47). The outer wall of the square tube (43) is provided with a scale (49). The lower side wall of the rope drum (47) is fixedly connected with a guide (50). The upper side wall of the piston plate (44) is fixedly connected with a conductive frame (51). The conductive frame (51) is electrically connected to the PLC controller (2). The inner wall of the square tube (43) is inlaid with multiple conductive plates (52). The side wall of the piston plate (44) is provided with a positioning groove, and the inner wall of the positioning groove is fixedly connected with a friction plate (54) through a positioning electric push rod (53).

4. A carbon isotope measuring device for shale gas reservoirs according to claim 3, characterized in that, The air supply assembly (55) includes a fixed plate (551) fixedly connected to the right side wall of the mounting frame (1). An air supply cylinder (552) is fixedly connected to the upper side wall of the fixed plate (551). A piston seat (56) is connected to the lower inner wall of the air supply cylinder (552) by a spring. The air supply cylinder (552) and the detection cylinder (4) are fixedly connected by the same air inlet pipe (57). A first regulating valve (58) is provided in the air inlet pipe (57). A bend pipe (59) is fixedly connected to the upper side wall of the air supply cylinder (552). A second regulating valve (60) is provided in the bend pipe (59). The bend plate (33) is connected to two bottom boxes (411) respectively through two air supply pipes.

5. A carbon isotope measuring device for shale gas reservoirs according to claim 4, characterized in that, The air inlet pipe (57) is provided with an air outlet pipe (61), and the air outlet pipe (61) is provided with a third regulating valve (62). The bend pipe (59) is provided with an exhaust pipe (63), and the exhaust pipe (63) is provided with a fourth regulating valve (64).

6. A carbon isotope measuring device for shale gas reservoirs according to claim 4, characterized in that, A pressure sensor (65) is connected to the upper side wall of the air supply cylinder (552), and the pressure sensor (65) is electrically connected to the PLC controller (2).

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