Device for improving core utilization, use method and guidance method thereof

Abstract

The present invention provides a device for improving core utilization, a method for use, and a guidance method thereof. The guidance method utilizes the device for improving core utilization, and the method for use of the device utilizes the device for improving core utilization. The device comprises a support portion, a repair portion, and a sampling portion. The support portion has an operating space; the repair portion is disposed within the operating space and repairs a damaged core within the operating space, thereby compacting and bonding the damaged core into a complete core; the sampling portion is disposed within the operating space and comprises a sampling end, at least one of the sampling ends being movable relative to the core, the sampling end having a sampling position for moving toward the core and extending into the core for sampling, and a retreat position for withdrawing from the core and away from the core; the core has a repair position, and the sampling end performs sampling operations at the repair position. The present invention solves the problem of low utilization of deep cores in the prior art due to damage or unreasonable drilling.

Description

Technical Field

[0001] The present invention relates to the technical field of deep oil and gas development, and in particular to a device for improving core utilization, a use method and a guidance method thereof. Background Art

[0002] With the increasing development of oil and gas resources, the development of shallow and medium-layer oil and gas resources alone can no longer meet the demand for oil and gas energy in society. Deep-layer oil and gas resource development has become a key area of ​​future oil and gas exploration and development. During the oil and gas exploration and development process, cores obtained from drilling into oil and gas reservoirs are crucial geological data. Systematic analysis of target reservoir core samples allows for detailed reservoir evaluation, guiding the formulation of oil and gas development plans.

[0003] Existing artificial deep cores cannot effectively simulate the mineral composition, pore development characteristics, and other conditions of actual reservoirs, and a large number of real deep cores are still needed for experiments. However, as reservoir depth increases, the geological conditions of the reservoir become increasingly complex. The recovery rate and integrity rate of cores obtained from deep oil and gas reservoirs are low. A large number of short, broken cores are discarded and cannot be used because they do not meet the size requirements for drilling plug samples. In addition, the difficulty and cost of drilling to obtain cores are very high. Even if relatively complete cores are obtained through drilling, if the drilling location is not properly selected during the process of drilling plug samples, a large number of intact cores between adjacent drill holes on a large diameter core will remain unused, resulting in a huge waste of cores and a low utilization rate of deep cores. Summary of the Invention

[0004] The main purpose of the present invention is to provide a device, a method of use and a guidance method for improving core utilization, so as to solve the problem in the prior art that deep core utilization is low due to damage or unreasonable drilling.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a device for improving the utilization rate of cores, comprising: a supporting portion, a repairing portion and a sampling portion, wherein the supporting portion has an operating space; the repairing portion is arranged in the operating space, and is used to repair the damaged core located in the operating space, so that the damaged core is compressed and bonded into a complete core; the sampling portion is arranged in the operating space, and the sampling portion has a sampling end, at least the sampling end is movably arranged relative to the core, the sampling end has a sampling position that moves toward the core and extends into the core for sampling, and the sampling end has an avoidance position that exits the core and moves away from the core; the core has a repair position, and the sampling end performs sampling operations on the repair position.

[0006] Furthermore, the support part includes a support pad, which is located in the working space, and at least a portion of the core is located on the support pad. The sampling part is movably arranged in the working space and is located above the core. The sampling end is arranged to be raised and lowered relative to the core so that the sampling end can switch between a sampling position and an avoidance position.

[0007] Furthermore, the support part also includes a support platform, a protective cover and a guide rail, wherein a support pad is provided on the support platform; the protective cover is provided on part of the support platform, and the inner wall surface of the protective cover and the support surface of the support platform form a working space; the guide rail is provided in the working space, and the guide rail is extended along the axial direction of the core, and the sampling part is slidably provided on the guide rail.

[0008] Furthermore, the repair part includes a cutting mechanism and a pressing mechanism, wherein the cutting mechanism is slidably arranged on the guide rail and is spaced apart from the sampling part, the cutting mechanism has a cutting end, the cutting end is raised and lowered relative to the core, the cutting end has a cutting position for moving toward the core to cut the damaged end face of the core, and the cutting end has an avoidance position for moving away from the core to avoid the core; the pressing mechanism is arranged on the supporting platform, the pressing mechanism has at least one pressing end, the pressing end is used to provide a pressing force for the core after the cutting operation, so that at least two cores after the cutting operation are pressed and bonded into a complete core.

[0009] Furthermore, the cutting mechanism includes a telescopic structure and a cutting knife, wherein the first end of the telescopic structure is slidably set on the guide rail, and the second end of the telescopic structure is telescopically set; the cutting knife is rotatably set at the second end of the telescopic structure to form a cutting end.

[0010] Furthermore, the clamping mechanism includes a first clamping mechanism, which is arranged on the support platform and located on the first side of the support pad. The first clamping mechanism has a first clamping space, and the side of the first clamping space facing the support pad is an open end so that the first clamping space is connected to the working space; wherein, a first clamping end is arranged in the first clamping space, and the first clamping end is movably arranged along the radial direction of the core to provide radial clamping force for the core.

[0011] Furthermore, the pressing surface of the first pressing end facing the core is matched with the surface of the core facing the first pressing end.

[0012] Furthermore, the first clamping mechanism also includes a buffer structure, which is arranged in the first clamping space and opposite to the first clamping end. The surface of the buffer structure facing the first clamping end is a buffer support surface, and the buffer support surface is adapted to the surface of the core facing the buffer structure.

[0013] Furthermore, the clamping mechanism also includes a second clamping mechanism, which is arranged on the support platform and located on the second side of the support pad. The second clamping mechanism has a second clamping end, which is movably arranged along the axial direction of the core to provide axial clamping force for the core.

[0014] Furthermore, the second clamping mechanism includes a spiral propulsion rod, a guide slider and a clamping structure, wherein the spiral propulsion rod is rotatably arranged on the support platform, and the spiral propulsion rod is extended along the axial direction of the core; the guide slider is movably arranged on the spiral propulsion rod; the clamping structure is arranged on the guide slider, and the clamping structure has a second clamping end on the side facing the support pad.

[0015] Furthermore, the surface of the support platform facing the working space has a groove structure, and the spiral propulsion rod is rotatably arranged in the groove structure.

[0016] Furthermore, the second clamping mechanism also includes a clamping drive portion, which is arranged in the groove structure, and a drive shaft of the clamping drive portion is drivingly connected to the spiral propulsion rod.

[0017] Furthermore, the device for improving core utilization also includes a dust collecting part, a part of which is arranged on the supporting platform of the supporting part and is located outside the working space, and another part of the dust collecting part extends into the working space to perform dust collection operations.

[0018] Furthermore, the dust collecting part includes a dust collecting pipe and a dust collecting drive part, wherein the first end of the dust collecting pipe is connected to the external integration box, and the second end of the dust collecting pipe extends into the working space and is connected to the working space; the dust collecting drive part is arranged on the dust collecting pipe.

[0019] According to another aspect of the present invention, a method for using a device for improving core utilization is provided. The device for improving core utilization is the above-mentioned device for improving core utilization, and the method for using includes the following steps: step S1, placing the damaged core in the working space of the support part; step S2, repairing the damaged core by the repair part so that the damaged core is pressed and bonded into a complete core; step S3, sampling the core after the repair operation by the sampling part.

[0020] Furthermore, in step S2, the method of use further includes step S20, cutting the damaged end face of the damaged core by the cutting mechanism of the repair part; and step S22, pressing and bonding at least two cores after the cutting operation into a complete core by the pressing mechanism.

[0021] Furthermore, after step S20 and before step S22, the method further includes step S21 of grinding the cut end surface of the core after the cutting operation.

[0022] According to another aspect of the present invention, a guidance method for improving core utilization is provided, the guidance method comprising the following steps: step S100, obtaining a first plunger rock sample from a complete core in a target layer, and measuring the physical property parameters of the first plunger rock sample; step S200, obtaining core particles from a damaged core in a target layer, grinding the core particles into core powder, and then mixing the core powder with an organic adhesive to prepare an adhesive; step S300, repairing the damaged core in the target layer using the repairing portion of the device for improving core utilization and the adhesive prepared in step S200, and sampling the damaged core after the repairing operation using the sampling portion of the device for improving core utilization. Sampling is performed at the repair position of the core after the operation; in step S400, the physical parameters of the second plunger rock sample taken out in step S300 are measured; in step S500, the physical parameters of the first plunger rock sample are compared with the physical parameters of the second plunger rock sample, wherein the error between the physical parameters of the second plunger rock sample and the physical parameters of the first plunger rock sample is A, and the preset error is B; wherein, when A≤B, it is judged that the adhesive prepared in step S200 meets the requirements; when A>B, it is judged that the adhesive prepared in step S200 does not meet the requirements, and the ratio of the core powder to the organic adhesive is adjusted, and steps S200 to S500 are repeated until the relationship between A and B satisfies: A≤B.

[0023] Furthermore, the physical property parameters include at least one of porosity, permeability, and wettability.

[0024] According to the technical solution of the present invention, a device for improving the utilization rate of cores is provided, comprising a support portion, a repair portion, and a sampling portion, wherein the support portion has an operating space; the repair portion is arranged in the operating space, and is used to repair damaged cores located in the operating space, so that the damaged cores are compressed and bonded into a complete core; the sampling portion is arranged in the operating space, and has a sampling end, at least the sampling end is movably arranged relative to the core, and has a sampling position for moving toward the core and extending into the core for sampling, and a retreat position for withdrawing from the core and away from the core; the core has a repair position, and the sampling end performs sampling operations at the repair position. Damaged cores obtained by deep drilling or deep cores obtained by unreasonable drilling plunger sampling can be reused after repair, thereby avoiding waste of cores and improving the utilization rate of deep cores. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 A schematic structural diagram of a device for improving core utilization according to an optional embodiment of the present invention is shown;

[0027] Figure 2 Shown Figure 1 A schematic structural diagram of a compression plate of a device for improving core utilization;

[0028] Figure 3 A comparison diagram of a core before and after repair according to Example 1 of the present invention is shown;

[0029] Figure 4 A comparison diagram of the core before and after repair according to Example 2 of the present invention is shown.

[0030] The above drawings include the following reference numerals:

[0031] 10. Support part; 11. Working space; 12. Support pad; 13. Support platform; 131. Groove structure; 14. Protective cover; 15. Guide rail;

[0032] 20. Repair unit; 21. Cutting mechanism; 211. Telescopic structure; 212. Cutting blade; 213. First slider; 22. Pressing mechanism; 221. First pressing mechanism; 2211. First pressing space; 22111. Pressing plate; 22112. Rotating disk structure; 2213. Buffer structure; 22131. Buffer block; 22132. Support plate; 222. Second pressing mechanism; 2221. Screw propulsion rod; 2222. Guide slider; 2223. Clamping structure; 2224. Pressing drive unit;

[0033] 30. Sampling unit; 31. Telescopic rod; 32. Sampling head; 33. Second slider;

[0034] 40. Dust collecting unit; 41. Dust collecting pipe; 42. Dust collecting drive unit;

[0035] 2. Core; 25. First splicing block; 26. Second splicing block; 23. Third splicing block; 24. Fourth splicing block. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] In order to solve the problem in the prior art that deep cores have low utilization due to damage or unreasonable drilling, the present invention provides a device for improving core utilization, a method for use and a guidance method thereof.

[0038] Example 1

[0039] The guiding method for improving core utilization rate applies a device for improving core utilization rate, and the method for using the device for improving core utilization rate uses the device for improving core utilization rate.

[0040] like Figures 1 to 3 As shown, the device for improving the utilization rate of cores includes a support part 10, a repair part 20 and a sampling part 30, wherein the support part 10 has an operating space 11; the repair part 20 is arranged in the operating space 11, and the repair part 20 is used to repair the damaged core 2 located in the operating space 11, so that the damaged core 2 is pressed and bonded into a complete core 2; the sampling part 30 is arranged in the operating space 11, and the sampling part 30 has a sampling end, at least the sampling end is movably arranged relative to the core 2, the sampling end has a sampling position that moves toward the core 2 and extends into the core 2 for sampling, and the sampling end has an avoidance position that exits the core 2 and moves away from the core 2; the core 2 has a repair position, and the sampling end performs sampling operations on the repair position.

[0041] The device for improving the utilization rate of cores includes a support portion 10, a repair portion 20, and a sampling portion 30, wherein the support portion 10 has an operating space 11; the repair portion 20 is disposed in the operating space 11 and is used to repair a damaged core 2 in the operating space 11 so as to compress and bond the damaged core 2 into a complete core 2; the sampling portion 30 is disposed in the operating space 11 and has a sampling end, at least the sampling end is movably disposed relative to the core 2, the sampling end has a sampling position for moving toward the core 2 and extending into the core 2 for sampling, and a retreat position for exiting the core 2 and moving away from the core 2; the core 2 has a repair position, and the sampling end performs sampling operations at the repair position. Damaged cores 2 obtained from deep drilling or deep cores 2 obtained through unreasonable drilling plunger sampling can be reused after repair, thereby avoiding waste of cores 2 and improving the utilization rate of deep cores 2.

[0042] like Figure 1 As shown, the support portion 10 includes a support block 12, which is positioned within the working space 11. At least a portion of the core 2 is positioned on the support block 12. The sampling portion 30 is movably disposed within the working space 11 and above the core 2. The sampling end is movable relative to the core 2 so as to be movable between a sampling position and a retractable position. This facilitates manipulation of the sampling end to sample the core 2 at the sampling position.

[0043] It should be noted that, in the present application, the support pad 12 has a plurality of arc-shaped grooves with different curvatures, and is used to place cores 2 of different sizes when performing repair operations and sampling operations on the cores 2.

[0044] like Figure 1 As shown, the support portion 10 further includes a support platform 13, a protective cover 14, and a guide rail 15. The support platform 13 is provided with a support pad 12. The protective cover 14 is partially mounted on the support platform 13, and the inner wall surface of the protective cover 14 and the support surface of the support platform 13 enclose a working space 11. The guide rail 15 is disposed within the working space 11 and extends axially along the core 2. The sampling portion 30 is slidably mounted on the guide rail 15. In this way, the protective cover 14 protects the repair portion 20 and the sampling portion 30, and the sampling portion 30 can slide to sample different locations of the core.

[0045] It should be noted that in the present application, the sampling portion 30 includes a telescopic rod 31, a sampling head 32, and a second slider 33. The first end of the telescopic rod 31 is slidably mounted on the guide rail 15 via the second slider 33, and the second end of the telescopic rod 31 is connected to the sampling head 32 to form a sampling end. Preferably, the telescopic rod 31 is driven by a hydraulic pump.

[0046] like Figure 1 As shown, the repair unit 20 includes a cutting mechanism 21 and a pressing mechanism 22. The cutting mechanism 21 is slidably mounted on the guide rail 15 and spaced apart from the sampling unit 30. The cutting mechanism 21 has a cutting end that is movable relative to the core 2. The cutting end has a cutting position for moving toward the core 2 to cut the damaged end surface of the core 2, and a retracting position for moving away from the core 2 to avoid the core 2. The pressing mechanism 22 is mounted on the support platform 13 and has at least one pressing end for providing a pressing force to the cut core 2, thereby pressing and bonding at least two cut cores 2 together to form a complete core 2. In this way, the cutting mechanism 21 can cut the damaged end surface of the core 2, and the pressing mechanism 22 provides a pressing force to the cut core 2, thereby pressing and bonding the cut core 2 together to form a complete core 2.

[0047] like Figure 1 As shown, the cutting mechanism 21 includes a telescopic structure 211 and a cutting blade 212. The first end of the telescopic structure 211 is slidably mounted on the guide rail 15, while the second end of the telescopic structure 211 is telescopically mounted. The cutting blade 212 is rotatably mounted on the second end of the telescopic structure 211 to form a cutting end. This allows the cutting blade 212 to cut different locations on the core.

[0048] It should be noted that, in the present application, the cutting mechanism 21 further includes a first slider 213 , and the first end of the telescopic structure 211 is disposed on the guide rail 15 via the first slider 213 .

[0049] Preferably, the telescopic structure 211 is driven by a hydraulic pump.

[0050] like Figure 1 As shown, the clamping mechanism 22 includes a first clamping mechanism 221, which is arranged on the support platform 13 and located on the first side of the support pad 12. The first clamping mechanism 221 has a first clamping space 2211, and the side of the first clamping space 2211 facing the support pad 12 is open, so that the first clamping space 2211 is connected to the working space 11; wherein, a first clamping end is provided in the first clamping space 2211, and the first clamping end is movably provided along the radial direction of the core 2 to provide radial clamping force to the core 2. In this way, the first clamping mechanism 221 can be used to fix the core 2 to be cut to prevent the core 2 from shaking during the cutting operation, and can also compress the core 2 after the cutting operation in the radial direction of the core, so as to bond the cut core 2 into a complete core 2.

[0051] like Figure 1 As shown, the pressing surface of the first pressing end facing the core 2 is adapted to the surface of the core 2 facing the first pressing end. In this way, the contact area between the pressing surface of the first pressing end and the core 2 is large, ensuring that the first pressing end has sufficient pressing force on the core 2.

[0052] like Figure 1 As shown, the first pressing mechanism 221 further includes a buffer structure 2213, which is disposed within the first pressing space 2211 and opposite the first pressing end. The surface of the buffer structure 2213 facing the first pressing end serves as a buffer support surface, which mates with the surface of the core 2 facing the buffer structure 2213. Thus, the buffer structure 2213 can provide a buffering effect for the core 2, preventing the first pressing end of the first pressing mechanism 211 from causing damage to the core 2 due to excessive pressure.

[0053] like Figure 1 As shown, the clamping mechanism 22 further includes a second clamping mechanism 222, which is disposed on the support platform 13 and located on the second side of the support block 12. The second clamping mechanism 222 has a second clamping end, which is movably disposed along the axial direction of the core 2 to provide an axial clamping force to the core 2. In this way, the second clamping mechanism 222 can be used to fix the core 2 to be cut to prevent the core 2 from shaking during the cutting operation. The second clamping mechanism 222 can also be used to axially compress the core 2 after the cutting operation to bond the cut core 2 into a complete core 2.

[0054] It should be noted that in this application, Figure 1 and Figure 2 As shown, the first clamping mechanism 221 includes a fixed frame, which is mounted on the support platform 13 by bolts. The fixed frame encloses a first clamping space 2211. The fixed frame is provided with an internal threaded hole, and the internal threaded hole is installed with a lifting rod. The first end of the lifting rod is connected to the clamping plate 22111 in the first clamping space 2211, and the second end of the lifting rod is connected to the turntable structure 22112 outside the first clamping space 2211. The height of the clamping plate 22111 can be adjusted up and down by rotating the turntable structure 22112. Among them, the clamping plate 22111 is an arc-shaped plate. Among them, there are two lifting rods, and there are correspondingly two turntable structures 22112.

[0055] It should be noted that, in the present application, the buffer structure 2213 includes a buffer structure 2213 and a support plate 22132. The support plate 22132 has a buffer support surface. An area is formed between the buffer support surface and the compression surface for clamping the core. The end of the support plate 22132 away from the compression surface is connected to the buffer structure 2213. The buffer structure 2213 prevents the core 2 from being broken when pressure is applied to the core 2.

[0056] like Figure 1 As shown, the second clamping mechanism 222 includes a screw propeller 2221, a guide slider 2222, and a clamping structure 2223. The screw propeller 2221 is rotatably mounted on the support platform 13 and extends axially along the core 2. The guide slider 2222 is movably mounted on the screw propeller 2221. The clamping structure 2223 is mounted on the guide slider 2222 and has a second clamping end on the side facing the support block 12. Thus, the second clamping end can be moved to clamp the end surface of the core 2.

[0057] It should be noted that, in the present application, the second pressing end is an arc-shaped structure, which is used to cooperate with the outer surface of the clamped core 2.

[0058] like Figure 1 As shown, the surface of the support platform 13 facing the working space 11 has a groove structure 131, and the spiral propulsion rod 2221 is rotatably arranged in the groove structure 131. In this way, the groove structure 131 of the working space 11 can protect the spiral propulsion rod 2221 and save device space.

[0059] like Figure 1As shown, the second pressing mechanism 222 further includes a pressing driving portion 2224, which is disposed in the groove structure 131, and a driving shaft of the pressing driving portion 2224 is drivingly connected to the spiral propulsion rod 2221. In this way, the smooth movement of the spiral propulsion rod 2221 is ensured.

[0060] Preferably, the spiral propulsion rod 2221 is made of stainless steel; and the pressing drive part 2224 is a servo motor.

[0061] like Figure 1 As shown, the device for improving core utilization also includes a dust collection unit 40. A portion of the dust collection unit 40 is disposed on the support platform 13 of the support unit 10 and is located outside the workspace 11. Another portion of the dust collection unit 40 extends into the workspace 11 to collect dust. In this way, dust generated during repair and sampling operations can be discharged outside the workspace 11 through the dust collection unit 40.

[0062] like Figure 1 As shown, the dust collection unit 40 includes a dust collection duct 41 and a dust collection drive unit 42. The first end of the dust collection duct 41 is connected to the external integrated box, while the second end of the dust collection duct 41 extends into and is connected to the work space 11. The dust collection drive unit 42 is mounted on the dust collection duct 41. The suction force of the dust collection drive unit 42 draws dust out of the work space 11 through the dust collection duct 41.

[0063] It should be noted that, in the present application, the second end of the dust collecting duct 41 has a dust collecting hood, which is trumpet-shaped and installed in the working space 11 .

[0064] The above-mentioned guiding method for improving the utilization rate of cores includes the following steps: step S100, obtaining a first plunger rock sample from a complete core 2 in a target layer, and measuring the physical property parameters of the first plunger rock sample; step S200, obtaining core particles from a damaged core 2 in a target layer, grinding the core particles into core powder, and then mixing the core powder with an organic adhesive to prepare an adhesive; step S300, using the repairing part 20 in the above-mentioned and below-mentioned device for improving the utilization rate of cores and the adhesive prepared in step S200. The damaged core 2 in the target layer is repaired by using an agent, and the repaired position of the core 2 after the repair is sampled by the sampling portion 30 in the device for improving the utilization rate of the core; in step S400, the physical property parameters of the second plunger rock sample taken out in step S300 are measured; in step S500, the physical property parameters of the first plunger rock sample are compared with the physical property parameters of the second plunger rock sample, wherein the error between the physical property parameters of the second plunger rock sample and the physical property parameters of the first plunger rock sample is A, and the preset error is B;

[0065] Among them, when A≤B, it is judged that the adhesive prepared in step S200 meets the requirements; when A>B, it is judged that the adhesive prepared in step S200 does not meet the requirements, and the ratio of core powder to organic adhesive is adjusted, and steps S200 to S500 are repeated until the relationship between A and B satisfies: A≤B.

[0066] In step S300, a method for using the device for improving core utilization is included. The device for improving core utilization is the above-mentioned device for improving core utilization, and the method for using includes the following steps: step S1, placing the damaged core 2 in the working space 11 of the support part 10; step S2, repairing the damaged core 2 through the repair part 20, so that the damaged core 2 is pressed and bonded into a complete core 2; step S3, sampling the core 2 after the repair operation through the sampling part 30.

[0067] In step S2, the method of use further includes: step S20, cutting the damaged end face of the damaged core 2 by the cutting mechanism 21 of the repair part 20; step S22, pressing and bonding at least two cores 2 after the cutting operation into a complete core 2 by the pressing mechanism 22.

[0068] After step S20 and before step S22, the method further includes: step S21, grinding the cut end surface of the core 2 after the cutting operation.

[0069] In the present application, the physical property parameters include at least one of porosity, permeability, and wettability.

[0070] Preferably, B=10%.

[0071] Preferably, in step S100, 2-3 plunger rock samples should be selected from the same layer of core 2 to perform basic physical property tests, and the average value of the test results is taken as the physical property parameters of the first plunger rock sample.

[0072] Preferably, in step S200, the organic adhesive selected is a uniform mixture of epoxy resin and low-temperature curing agent in a ratio of 2: 1. In the core splicing adhesive obtained by mixing the organic adhesive with the core powder, the proportion of the organic adhesive is 5%-15%.

[0073] Preferably, in step S300, if the core hardness is relatively high, the reservoir formation water should be used during cutting or simulated reservoir formation water should be prepared to perform cooling cutting.

[0074] It should be noted that in the present application, in step S300, after the cutting operation in the repair operation and before bonding, the cut end face of the core 2 after the cutting operation is polished, and the flatness of the rear end face after polishing should be ensured to be within ±0.5mm.

[0075] Preferably, in step S300, when bonding the core, heating is not required, and pressurization and fixing for 2-3 hours at room temperature is sufficient.

[0076] Preferably, in step S300, after the repair operation and before the sampling operation, the bonded core 2 is wrapped with 3-5 layers of heat shrink film.

[0077] It should be noted that in the present application, in step S500, when the error between the physical parameters of the second plunger rock sample and the physical parameters of the first plunger rock sample is greater than 10%, if the porosity and permeability of the second plunger rock sample are lower than the physical parameters of the first plunger rock sample, the proportion of organic adhesive should be reduced when reconfiguring the adhesive for core splicing in step S200; if the porosity and permeability of the second plunger rock sample are higher than the physical parameters of the first plunger rock sample, the proportion of organic adhesive should be increased when reconfiguring the adhesive for core splicing in step S200.

[0078] In Example 1 of the present application, Figure 3 As shown, in the above-mentioned step S300, the first method of using the device for improving core utilization is to rotate the turntable structure 22112 of the first clamping mechanism 221, lift the clamping plate 22111, and place one end of the core 2 on the support plate 22132 on the first clamping mechanism 221, and the other end on the support pad 12 with the arc-shaped groove. After rotating the turntable structure 22112 and lowering the clamping plate 22111 to clamp one end of the core 2, the clamping drive unit 2224 of the second clamping mechanism 222 is activated, and the position of the clamping structure 2223 is adjusted to firmly fix the core.

[0079] Adjust the position of the first slider 213 of the cutting mechanism 21 so that the cutting mechanism 21 is aligned with the position to be cut on the core 2. Start the power supply and cut vertically along the radial direction of the core 2. After the cutting is completed, the following is obtained: Figure 3 The first splicing block 25 and the second splicing block 26 are shown. The cut end surfaces of the first splicing block 25 and the second splicing block 26 are polished to ensure that the flatness of the cut end surfaces is within ±0.5 mm.

[0080] After polishing, secure the first splicing block 25 to the first clamping mechanism 221. Apply the core splicing adhesive prepared in step S200 to the end face to be spliced, ensuring that the adhesive is evenly applied to the cut end face. The thickness of the adhesive is controlled to be 3-5 mm. Place the second splicing block 26 on the arc-shaped groove of the support pad 12. Align the end face to be spliced ​​of the first splicing block 25 with the end face to be spliced ​​of the second splicing block 26. Start the clamping drive unit 2224, adjust the position of the clamping structure 2223, and splice the first splicing block 25 and the second splicing block 26 together. Fix them for 2-3 hours to allow the adhesive to fully cure.

[0081] After the cement at the core joint is properly bonded, the compression drive 2224 is activated, the clamping structure 2223 is adjusted, and the turntable 22112 is simultaneously rotated to lift the compression plate 22111 and remove the core 2. After wrapping the repaired core portion with 3 to 5 layers of heat shrink film, the core is re-secured to the device using the first and second compression mechanisms 221 and 222. The second slider 33 of the sampling unit 30 is adjusted to align the sampling head 32 with the repaired portion of the core 2. The power is activated, and a plunger sample is drilled vertically along the core's radial direction at the repaired portion of the core 2.

[0082] Example 2

[0083] like Figure 4 As shown, the difference from the first embodiment is that in the second method of using the device for improving core utilization, in the above-mentioned step S300, the turntable structure 22112 of the first clamping mechanism 221 is rotated, the clamping plate 22111 is lifted, and one end of the core 2 is placed on the support plate 22132 on the first clamping mechanism 221, and the other end is placed on the support pad 12 with the arc-shaped groove. After the turntable structure 22112 is rotated and the clamping plate 22111 is lowered to clamp one end of the core 2, the clamping drive unit 2224 of the second clamping mechanism 222 is activated, and the position of the clamping structure 2223 is adjusted to firmly fix the core.

[0084] Adjust the position of the first slider 213 of the cutting mechanism 21, rotate the cutting blade 212 90 degrees, and align the cutting mechanism 21 with the position to be cut on the core 2. Start the power supply and cut horizontally along the axis of the core 2. After the cutting is completed, the following is obtained: Figure 4 The third splicing block 23 and the fourth splicing block 24 are shown. The cut surfaces of the third splicing block 23 and the fourth splicing block 24 are polished to ensure that the flatness of the cut surface is within ±0.5 mm.

[0085] Place the polished third splicing block 23 on the support plate 22132 of the first clamping mechanism 221. Apply the core splicing adhesive prepared in step S200 to the surface to be spliced, ensuring that the adhesive is evenly applied to the cut surface. The thickness of the adhesive is controlled to be 3-5 mm. Align the surface to be spliced ​​of the third splicing block 23 with the surface to be spliced ​​of the fourth splicing block 24. Rotate the turntable structure 22112 in the first clamping mechanism 221, lower the clamping plate 22111, and splice the third splicing block 23 and the fourth splicing block 24 together. Fix them for 2-3 hours to allow the adhesive to fully cure.

[0086] After the cement at the core joint is properly bonded, the compression drive 2224 is activated, the clamping structure 2223 is adjusted, and the turntable 22112 is simultaneously rotated to lift the compression plate 22111 and remove the core 2. After wrapping the repaired core portion with 3 to 5 layers of heat shrink film, the core is re-secured to the device using the first and second compression mechanisms 221 and 222. The second slider 33 of the sampling unit 30 is adjusted to align the sampling head 32 with the repaired portion of the core 2. The power is activated, and a plunger sample is drilled vertically along the core's radial direction at the repaired portion of the core 2.

[0087] From the above description, it can be seen that the above-mentioned embodiment of the present invention achieves the following technical effects: the device for improving the utilization rate of the core includes a support part 10, a repair part 20 and a sampling part 30, wherein the support part 10 has an operating space 11; the repair part 20 is arranged in the operating space 11, and the repair part 20 is used to repair the damaged core 2 located in the operating space 11, so that the damaged core 2 is pressed and bonded into a complete core 2; the sampling part 30 is arranged in the operating space 11, and the sampling part 30 has a sampling end, at least the sampling end is movably arranged relative to the core 2, and the sampling end has a sampling position that moves toward the core 2 and extends into the core 2 for sampling, and the sampling end has an avoidance position that exits the core 2 and moves away from the core 2; the core 2 has a repair position, and the sampling end performs sampling operations on the repair position. The damaged core 2 obtained by deep drilling or the deep core 2 after unreasonable drilling plunger sampling is placed in the working space 11, the damaged core 2 is repaired by the repair part 20, and then the repaired position of the core 2 is sampled by the sampling part 30. The repaired core 2 can be reused, avoiding the waste of the core 2 and improving the utilization rate of the deep core 2.

[0088] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0089] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0090] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0091] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0092] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0093] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A device for improving core utilization, characterized in that: include: A support portion (10), the support portion (10) having a working space (11), the support portion (10) including a support pad (12), the support pad (12) being located in the working space (11), the support portion (10) further including a support platform (13) and a guide rail (15), the support platform (13) being provided with the support pad (12), and the guide rail (15) being provided in the working space (11); A repairing part (20), the repairing part (20) being arranged in the working space (11), and the repairing part (20) being used to perform a repair operation on a damaged rock core (2) located in the working space (11), so as to compress and bond the damaged rock core (2) into a complete rock core (2); a sampling portion (30), the sampling portion (30) being arranged in the working space (11), the sampling portion (30) having a sampling end, at least the sampling end being movably arranged relative to the core (2), the sampling end having a sampling position for moving toward the core (2) and extending into the core (2) for sampling, and the sampling end having an escape position for exiting the core (2) and away from the core (2); The core (2) has a repair position, and the sampling end performs a sampling operation on the repair position; The repair part (20) includes: a cutting mechanism (21), the cutting mechanism (21) being slidably disposed on the guide rail (15) and spaced apart from the sampling portion (30), the cutting mechanism (21) having a cutting end, the cutting end being movably disposed relative to the core (2), the cutting end having a cutting position for moving toward the core (2) to cut the damaged end face of the core (2), and a avoiding position for moving away from the core (2) to avoid the core (2); A pressing mechanism (22), the pressing mechanism (22) being arranged on the supporting platform (13), the pressing mechanism (22) having at least one pressing end, the pressing end being used to provide a pressing force for the core (2) after the cutting operation, so that at least two pieces of the core (2) after the cutting operation are pressed and bonded to form a complete core (2); The pressing mechanism (22) comprises: a first pressing mechanism (221), the first pressing mechanism (221) being arranged on the supporting platform (13) and located on a first side of the supporting pad (12), the first pressing mechanism (221) having a first pressing space (2211), and a side of the first pressing space (2211) facing the supporting pad (12) being an open end, so that the first pressing space (2211) is in communication with the working space (11); A first pressing end is provided in the first pressing space (2211), and the first pressing end is movably provided along the radial direction of the core (2) to provide a radial pressing force for the core (2); The pressing mechanism (22) further comprises: A second clamping mechanism (222) is provided on the support platform (13) and is located on a second side of the support pad (12). The second clamping mechanism (222) has a second clamping end, and the second clamping end is movably provided along the axial direction of the core (2) to provide an axial clamping force for the core (2).

2. The device for improving core utilization according to claim 1, characterized in that: At least a portion of the core (2) is located on the support block (12), the sampling portion (30) is movably arranged in the working space (11) and located above the core (2), and the sampling end is arranged to be liftable relative to the core (2) so that the sampling end can switch between the sampling position and the avoidance position.

3. The device for improving core utilization according to claim 2, characterized in that: The support portion (10) further includes: A protective cover (14), the protective cover (14) being provided on a portion of the support platform (13), and the inner wall surface of the protective cover (14) and the support surface of the support platform (13) enclosing the working space (11); The guide track (15) is extended along the axial direction of the core (2), and the sampling portion (30) is slidably arranged on the guide track (15).

4. The device for improving core utilization according to claim 1, characterized in that: The cutting mechanism (21) comprises: a telescopic structure (211), wherein a first end of the telescopic structure (211) is slidably disposed on the guide rail (15), and a second end of the telescopic structure (211) is telescopically disposed; A cutting knife (212) is rotatably arranged at the second end of the telescopic structure (211) to form the cutting end.

5. The device for improving core utilization according to claim 1, characterized in that: The pressing surface of the first pressing end facing the rock core (2) is adapted to the surface of the rock core (2) facing the first pressing end.

6. The device for improving core utilization according to claim 1, characterized in that: The first pressing mechanism (221) further includes: A buffer structure (2213) is provided in the first compression space (2211) and is arranged opposite to the first compression end. The surface of the buffer structure (2213) facing the first compression end is a buffer support surface, and the buffer support surface is adapted to the surface of the core (2) facing the buffer structure (2213).

7. The device for improving core utilization according to claim 1, characterized in that: The second pressing mechanism (222) comprises: A spiral propulsion rod (2221), the spiral propulsion rod (2221) is rotatably arranged on the support platform (13), and the spiral propulsion rod (2221) is extended along the axial direction of the core (2); A guide slider (2222), the guide slider (2222) being movably arranged on the spiral propulsion rod (2221); A clamping structure (2223), wherein the clamping structure (2223) is arranged on the guide slider (2222), and the clamping structure (2223) has the second clamping end on a side facing the support pad (12).

8. The device for improving core utilization according to claim 7, characterized in that: The surface of the support platform (13) facing the working space (11) has a groove structure (131), and the spiral propulsion rod (2221) is rotatably arranged in the groove structure (131).

9. The device for improving core utilization according to claim 8, characterized in that: The second pressing mechanism (222) further includes: A pressing drive unit (2224), wherein the pressing drive unit (2224) is arranged in the groove structure (131), and a driving shaft of the pressing drive unit (2224) is drivingly connected to the spiral propulsion rod (2221).

10. The device for improving core utilization according to any one of claims 1 to 9, characterized in that: The device for improving core utilization also includes: A dust collecting part (40), wherein a portion of the dust collecting part (40) is arranged on the supporting platform (13) of the supporting part (10) and is located outside the working space (11), and another portion of the dust collecting part (40) extends into the working space (11) to perform dust collection operations.

11. The device for improving core utilization according to claim 10, characterized in that: The dust collecting part (40) comprises: A dust collecting pipe (41), wherein a first end of the dust collecting pipe (41) is communicated with an external integrated box, and a second end of the dust collecting pipe (41) extends into the working space (11) and is communicated with the working space (11); A dust collection drive unit (42), wherein the dust collection drive unit (42) is arranged on the dust collection pipe (41).

12. A method for using a device for improving core utilization, characterized in that: The device for improving core utilization is the device for improving core utilization according to any one of claims 1 to 11, and the method for using the device comprises the following steps: Step S1, placing the damaged core (2) in the working space (11) of the support part (10); Step S2, repairing the damaged core (2) by using the repairing part (20) so that the damaged core (2) is pressed and bonded into a complete core (2); Step S3, sampling the core (2) after the repair operation is performed through the sampling unit (30).

13. The method of use according to claim 12, characterized in that: In step S2, the method further includes: Step S20, cutting the damaged end face of the damaged core (2) by the cutting mechanism (21) of the repairing part (20); Step S22: Compressing and bonding at least two of the cores (2) after the cutting operation into a complete core (2) by a pressing mechanism (22).

14. The method of use according to claim 13, wherein: After step S20 and before step S22, the method further includes: Step S21, grinding the cut end surface of the core (2) after the cutting operation.

15. A guidance method for improving core utilization, characterized in that: The guiding method comprises the following steps: Step S100, obtaining a first plunger rock sample from a complete rock core (2) in a target layer, and measuring the physical property parameters of the first plunger rock sample; Step S200, obtaining core particles from the damaged core (2) in the target layer, grinding the core particles into core powder, and then mixing the core powder with an organic adhesive to prepare an adhesive; Step S300, repairing the damaged core (2) in the target layer using the repairing portion (20) in the device for improving core utilization according to any one of claims 1 to 11 and the adhesive prepared in step S200, and sampling the repaired position of the core (2) after the repairing operation using the sampling portion (30) in the device for improving core utilization; Step S400, measuring the physical properties of the second plunger rock sample taken out in step S300; Step S500: comparing the physical property parameters of the first plunger rock sample and the physical property parameters of the second plunger rock sample, wherein the error between the physical property parameters of the second plunger rock sample and the physical property parameters of the first plunger rock sample is A, and the preset error is B; Wherein, when A≤B, it is judged that the adhesive prepared in step S200 meets the requirements; When A>B, it is determined that the adhesive prepared in step S200 does not meet the requirements, and the ratio of the core powder to the organic adhesive is adjusted, and steps S200 to S500 are repeated until the relationship between A and B satisfies: A≤B.

16. The guidance method according to claim 15, characterized in that: The physical property parameters include at least one of porosity, permeability, and wettability.

Images