CN211784823U - Loading device for rock fracturing simulation - Google Patents
Loading device for rock fracturing simulation Download PDFInfo
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- CN211784823U CN211784823U CN201922492920.0U CN201922492920U CN211784823U CN 211784823 U CN211784823 U CN 211784823U CN 201922492920 U CN201922492920 U CN 201922492920U CN 211784823 U CN211784823 U CN 211784823U
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Abstract
The utility model is suitable for a rock fracturing physical simulation technical field provides a loading device that rock fracturing simulation was used, including upper cover plate, lower apron, side direction pressurization spare and acoustic survey mould fore-set. The lateral pressurizing pieces are provided with at least two force applying surfaces for transmitting radial force to the core sample. The upper cover plate, the lower cover plate and the lateral pressurizing piece enclose to form a loading space for placing the core sample, and the lateral pressurizing piece is further used for sliding along the radial direction of the core sample and relative to the upper cover plate or the lower cover plate. The utility model provides a loading device that rock fracturing simulation was used can be for upper cover plate or apron gliding side direction pressurization spare down through the setting, makes the utility model discloses a loading device can simulate the loading test to different external diameter's cylinder type rock core sample, simultaneously the utility model discloses a loading device can be independent of rock fracturing analog device, the loading and the taking out of the rock core sample of being convenient for, also be convenient for wash.
Description
Technical Field
The utility model belongs to the technical field of rock fracturing physical simulation, more specifically say, relate to a loading device that rock fracturing simulation used.
Background
In recent years, the development process of unconventional oil and gas such as shale gas is accelerated, compared with the conventional oil and gas reservoir, the unconventional oil and gas reservoir is usually more compact and has a more complex pore structure, the oil and gas output is more difficult due to the low-pore and low-permeability characteristic, and the oil and gas recovery rate and the production efficiency are finally limited. At present, the fracture-making and permeability-increasing of a reservoir is mainly realized by the fracture modification technology in the industry, and further, the efficient development of unconventional oil and gas wells is obtained. The fracturing technology is widely applied to the fields of coal bed gas, dense gas, shale gas and the like, and the fracturing performance of reservoir rock is known as an important index for evaluating the development value of unconventional oil and gas reservoirs. Therefore, how to comprehensively, truly and accurately simulate the fracturing process of the rock reservoir to obtain effective fracture parameters is the key of the current unconventional oil and gas reservoir geology and development technology evaluation for comprehensively evaluating the fracturing effect.
Rock fracture physical simulation is a method for researching the mechanism of rock compressibility and crack generation and extension by artificially increasing the internal pressure of a rock sample indoors.
When the existing rock fracturing simulation or mechanical parameter testing device (single shaft, true/false three shaft and the like) is used for fracturing simulation test, a sample basically mainly comprises an artificial (cement material and the like) test piece, a cubic block sample and a field outcrop sample, an actual drilling rock core or an artificial rock core sample is rarely considered, and a cylindrical rock core of actual drilling has irreplaceability and can reflect actual formation conditions and rock properties most. In addition, the sample loading device of the common fracturing simulation or mechanical testing device in the market is integrated with the whole machine, is mostly unadjustable, is generally only limited to loading of samples with fixed size, cannot be separated from the whole machine, is not easy to clean and is inconvenient to use.
Therefore, the existing loading device for rock fracturing or mechanical parameter testing still has certain defects in specific detail design, and how to improve the loading device for rock samples on the basis of approaching to an actual core as much as possible aiming at diversified (different outer diameter sizes) rock samples is an important research content for improving the performance of the rock fracturing simulation device and boosting the oil and gas reservoir transformation process at present.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a loading device that rock fracturing simulation was used aims at solving or improves the loaded technical problem of the loaded of the different external diameter dimension rock specimen of the unable adaptation of loading device that current rock fracturing simulation was used at least to a certain extent.
In order to achieve the above object, the utility model provides a technical scheme be, provide a loading device that rock fracturing simulation used, include:
the upper cover plate is arranged above the core sample;
the lower cover plate is arranged below the core sample;
the lateral pressurizing pieces are provided with at least two force applying surfaces used for transmitting radial force to the core sample; and
the acoustic measurement module top column is in up-and-down sliding fit with the upper cover plate or the lower cover plate and is used for transmitting axial force to the core sample;
the upper cover plate, the lower cover plate and the lateral pressurizing piece enclose a loading space for placing a core sample, and the lateral pressurizing piece is further used for sliding along the radial direction of the core sample and relative to the upper cover plate or the lower cover plate.
Furthermore, the upper cover plate is provided with a plurality of upper sliding holes which are used for being arranged along the radial direction of the core sample, the lower cover plate is provided with a plurality of lower sliding holes which are used for being arranged along the radial direction of the core sample, and each upper sliding hole, each lower sliding hole and each lateral pressurizing piece are respectively in one-to-one correspondence;
the loading device for rock fracturing simulation further comprises a plurality of thread screwing assemblies, each thread screwing assembly is in one-to-one correspondence with each lateral pressurizing piece, an upper threaded hole is formed in the upper portion of each lateral pressurizing piece, a lower threaded hole is formed in the lower portion of each lateral pressurizing piece, and each thread screwing assembly comprises an upper thread screwing piece which is arranged in the upper sliding hole in a sliding mode and is in threaded connection with the upper threaded hole and a lower thread screwing piece which is arranged in the lower sliding hole in a sliding mode and is in threaded connection with the lower threaded hole.
Furthermore, the lateral pressurizing piece is provided with at least one sensor jack for a sensor to penetrate through and be attached to the periphery of the core sample.
Furthermore, the loading device for rock fracturing simulation further comprises a plurality of sensor fixing pieces, the sensor fixing pieces are installed on the lateral pressurizing pieces, each sensor fixing piece is provided with at least one clamping groove used for clamping a sensor, and each clamping groove is in one-to-one correspondence with each sensor jack.
Furthermore, the sensor fixing piece comprises a fixing plate, a plurality of elastic extension plates fixedly arranged on the fixing plate and a plurality of abutting pieces used for abutting against the periphery of the core sample, and each abutting piece is respectively arranged on the corresponding elastic extension plate; the clamping groove is arranged between the two adjacent elastic extension plates.
Further, the abutment is a spring.
Further, the lateral pressurizing pieces are four, and the four lateral pressurizing pieces are used for being uniformly arranged around the circumference of the core sample.
Further, the lateral pressurizing part is of a cylinder structure, the cylinder structure is provided with a side surface group, an upper end surface and a lower end surface, the side surface group comprises two vertically arranged and connected side surfaces and the force application surface, and two sides of the force application surface are respectively connected with the two side surfaces.
Furthermore, the acoustic logging mode top post comprises a guide post and a compression leg arranged at one end of the guide post and positioned between the upper cover plate and the lower cover plate, and a guide hole for the guide post to pass through is formed in the lower cover plate.
Further, the force application surface is an arc-shaped surface.
The utility model provides a loading device that rock fracturing simulation was used compares with prior art, can perhaps lap gliding side direction pressure member down for the upper cover plate through setting up, makes the utility model discloses a loading device can simulate the loading test to different external diameter's cylinder type rock core sample, simultaneously the utility model discloses a loading device can be independent of rock fracturing analog device, the loading and the taking out of the rock core sample of being convenient for, also be convenient for wash.
Drawings
Fig. 1 is one of schematic diagrams of a loading device for rock fracture simulation according to an embodiment of the present invention;
fig. 2 is a second schematic view of a loading device for rock fracture simulation according to an embodiment of the present invention;
fig. 3 is a schematic view of the loading device for rock fracture simulation according to an embodiment of the present invention after removing a lateral pressure member and corresponding upper and lower threaded tightening members;
FIG. 4 is a schematic view of the lateral compression member of FIG. 1 in cooperation with a sensor mount;
FIG. 5 is one of the schematic views of the lateral compression member of FIG. 4;
FIG. 6 is a second schematic view of the lateral compression member of FIG. 4;
fig. 7 is a schematic view of the sensor mount of fig. 4.
In the figure: 100. an upper cover plate; 110. an upper slide hole; 120. an upper via hole; 200. a lower cover plate; 210. a lower slide hole; 220. a guide cylinder; 300. a lateral compression member; 310. a force application surface; 320. a side surface; 321. a threaded hole of the fixing plate; 330. an upper end surface; 331. an upper boss; 3311. an upper threaded hole; 340. a lower end face; 341. a lower boss; 3411. a lower threaded hole; 350. a sensor jack; 400. acoustic testing of the modular jack; 410. a guide post; 420. pressing the column; 500. an upper threaded tightening member; 600. a sensor mount; 610. a fixing plate; 620. an elastic extension plate; 630. an abutting member; 700. a guide post positioning bolt; 800. a lower threaded tightening member; 900. and fixing the plate bolt.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that the terms "length," "width," "height," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," "tail," and the like, are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Further, "plurality" or "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 to 6, an embodiment of a loading device for rock fracturing simulation according to the present invention will now be described. The loading device for rock fracture simulation is detachably arranged in a rock core chamber and comprises an upper cover plate 100, a lower cover plate 200, a lateral pressurizing piece 300 and an acoustic testing model top column 400.
The loading device provided by the embodiment is mainly used for loading acting force on the cylindrical core sample. The lateral pressure members 300 have at least two members for being disposed around the circumference of the core sample, and the upper cover plate 100, the lower cover plate 200 and the lateral pressure members 300 enclose a loading space for placing the core sample.
Specifically, the upper cover plate 100 is disposed above the core sample, the lower cover plate 200 is disposed below the core sample, and the upper and lower cover plates 100 and 200 may be in an abutting relationship with the lateral pressurizing member 300 or in other fitting relationships. The lateral pressure member 300 is capable of sliding in the radial direction of the core sample and relative to the upper cover plate 100 or the lower cover plate 200, while the lateral pressure member 300 has a force application surface 310 for transmitting a radial force to (the outer periphery of) the core sample. The acoustic measurement model top pillar 400 is used for being in up-and-down sliding fit with the upper cover plate 100 or the lower cover plate 100, so that the acoustic measurement model top pillar 400 can transfer axial force to the core sample through up-and-down movement.
The embodiment of the utility model provides a loading device that rock fracturing simulation used uses in rock fracturing simulation equipment, rock fracturing simulation equipment include main body frame, axial loading mechanism, radial loading mechanism and cyclic annular confined pressure mechanism. Main body frame is equipped with the rock specimen room, the embodiment of the utility model provides a loading device that rock fracturing simulation was used just places behind the loading rock core sample in the rock specimen room. Rock sample room self is one and places the space, the embodiment of the utility model provides a loading device for rock fracturing simulation can realize simply and conveniently placing and also take out, and its self is an independent structure to can break away from in rock fracturing analog device, so that loading and taking out of rock core sample are convenient for wash simultaneously.
The power output end of the axial pressurizing mechanism is connected with or abutted against the acoustic detection mode top column 400 to generate axial force for loading; the radial pressurizing mechanism is used for generating horizontal radial force, and the annular confining pressure mechanism is connected with the power output end of the radial pressurizing mechanism and applies acting force along the radial direction of the core sample to each lateral pressurizing piece 300. The structures and the use methods of the main body frame, the axial pressurizing mechanism, the radial pressurizing mechanism and the annular confining pressure mechanism of the rock fracturing simulation equipment are all the prior art, and are not described herein again.
Since the lateral pressure member 300 has the force application surface 310, the force application surface 310 can apply radial force to core samples with different outer diameter sizes, and the force application surface 310 can be a V-shaped groove surface, a plane surface or an arc surface. And lateral pressure piece 300 can slide for the radial along the rock core sample and for upper cover plate 100 or lower apron 200 (be the rock core sample), so the embodiment of the utility model provides a loading device for rock fracturing simulation can carry out the loading of radial effort to the rock core sample of multiple specification (external diameter size).
The embodiment of the utility model provides a loading device that rock fracturing simulation was used compares with prior art, can be for upper cover plate or apron gliding side direction pressure piece down through setting up, makes the embodiment of the utility model provides a loading device that rock fracturing simulation was used can simulate the loading test to the cylinder type rock core sample of different external diameter size, simultaneously the embodiment of the utility model provides a loading device that rock fracturing simulation was used can be independent of rock fracturing analog device, and the loading and the taking out of the rock core sample of being convenient for are also convenient for wash.
Referring to fig. 1 to 6, as a specific embodiment of the loading device for rock fracturing simulation provided by the present invention, a plurality of upper sliding holes 110 for radially arranging along a core sample are provided on an upper cover plate 100, and a plurality of lower sliding holes 210 for radially arranging along the core sample are provided on a lower cover plate 200. Each upper slide hole 110, each lower slide hole 210 and each lateral pressing member 300 correspond to one another, i.e., one lateral pressing member 300 corresponds to one upper slide hole 110 above and one lower slide hole 210 below.
The embodiment of the utility model provides a loading device that rock fracturing simulation used still includes the subassembly of screwing of a plurality of screw threads. Similarly, each set of threaded tightening elements corresponds to one of the lateral pressing members 300, and each set of threaded tightening elements corresponds to one of the upper slide holes 110 and one of the lower slide holes 210. The lateral pressing member 300 is provided at an upper portion thereof with an upper screw hole 3311, and at a lower portion thereof with a lower screw hole 3411.
Each threaded tightening assembly includes an upper threaded tightening member 500 slidably disposed in the corresponding upper slide hole 110 and threadedly coupled to the upper threaded hole 3311 of the corresponding lateral compression member 300, and a lower threaded tightening member 800 slidably disposed in the corresponding lower slide hole 210 and threadedly coupled to the lower threaded hole 3411 of the corresponding lateral compression member 300.
The embodiment of the utility model provides a loading device that rock fracturing simulation was used when loading the rock core sample can place the roughly central point on apron 200 down with the rock core sample earlier and puts, then places the lower part butt of each side direction pressurization piece 300 on apron 200 down, places the upper portion of side direction pressurization piece 300 with upper cover plate 100 butt. At this time, the upper screw holes 3311 of the adjusting side pressure members 300 are aligned with the corresponding upper slide holes 110, the lower screw holes 3411 of the adjusting side pressure members 300 are aligned with the corresponding lower slide holes 210, and the force application surface of each side pressure member 300 is adjusted so as to abut against the outer periphery of the core sample. Then, the screw of the upper screw 500 is inserted through the upper slide hole 110 and screwed into the upper screw hole 3311, the screw of the lower screw 800 is inserted through the lower slide hole 210 and screwed into the lower screw hole 3411, the head of the upper screw 500 abuts on the upper portion of the upper cover plate 100, and the head of the lower screw 800 abuts on the lower portion of the lower cover plate 200. At this moment, just fix a position each side direction pressure member 300 and accomplish the side direction pressure member 300 and the upper cover plate 100 with the connection of apron 200 down, also assembled exactly the utility model provides a loading device that rock fracturing simulation used to the rock core sample that will await measuring fixes a position, loads into the utility model provides an in the loading device that rock fracturing simulation used.
In addition, in the simulation fracturing test, the annular confining pressure mechanism can make each lateral pressure piece 300 move along the radial direction of the core sample and towards the central axis of the core sample, at this time, the upper threaded tightening piece 500 slides in the upper sliding hole 110, the lower threaded tightening piece 800 slides in the lower sliding hole 210, and the cooperation of the upper threaded tightening piece 500 and the upper sliding hole 110 and the cooperation of the lower threaded tightening piece 800 and the lower sliding hole 210 are equivalent to a certain guiding function for the movement of the lateral pressure piece 300.
As a specific embodiment of the loading device for rock fracturing simulation provided by the present invention, the upper thread screwing piece 500 and the lower thread screwing piece 800 may be a bolt or a screw, respectively.
Referring to fig. 1 to 6, as a specific embodiment of the loading device for rock fracturing simulation provided by the present invention, at least one sensor insertion hole 350 for allowing a sensor to pass through and fit with the periphery of a core sample is formed on the lateral pressure member 300. Because the real-time laminating control such as simulation fracturing process needs strain sensor, acoustic sensor, so set up sensor jack 350 on side direction pressure member 300, sensor jack 350 is the via hole that runs through side direction pressure member 300, is convenient for assemble the utility model provides a behind the loading device that rock fracturing simulation used, can with each sensor of rock core sample laminating in the outside installation of slave unit.
Please refer to fig. 1 to 4 and 7, which are specific embodiments of the loading device for rock fracturing simulation provided by the present invention, the loading device for rock fracturing simulation provided by the embodiment of the present invention further includes a plurality of sensor fixing members 600. The sensor holder 600 is mounted on the lateral pressing member 300, and one sensor holder 600 may be mounted on one lateral pressing member 300, or a plurality of sensor holders 600 may be mounted.
The sensor fixing member 600 has at least one card slot 640 for clamping and installing the sensor, and one card slot 640 corresponds to one sensor jack 350. The sensor is fixed on the sensor fixing member 600 by clamping, and the fixed sensor passes through the corresponding sensor jack 350 to be attached to the rock sample test piece.
Referring to fig. 1 to 4 and 7, as a specific embodiment of the loading device for rock fracturing simulation provided by the present invention, the sensor fixing member 600 includes a fixing plate 610, a plurality of elastic extension plates 620 fixed on the fixing plate 610, and a plurality of abutting members 630 for abutting against the periphery of the core sample, wherein at least one abutting member 630 is installed on one elastic extension plate 620. The locking groove 640 is disposed between two adjacent elastic extension plates 620.
The fixed plate 610 is a main body of the sensor fixing member 600, the fixed plate 610 is also a thin plate structure, the elastic extension plate 620 is a long strip plate disposed on the fixed plate 610, and the elastic extension plate 620 has certain flexibility or elasticity, and the elastic extension plate 620 can be bent and elastically deformed relative to the fixed plate 610. A slot 640 for mounting the sensor is formed between two adjacent elastic extending plates 620.
After the loading device that rock fracturing simulation provided by the embodiment of the utility model used (sensor mounting 600 has also been installed on side direction pressure member 300), the setting that draw-in groove 640 corresponds is in the relative outside in the outside of sensor jack 350, and the one end that the elasticity stretched out butt 630 on board 620 simultaneously then stretches into in sensor jack 350 and with the periphery butt of rock core sample. The operator is with the sensor block in draw-in groove 640, and the elasticity stretches out the periphery laminating that the sensor after the block and rock core sample can be guaranteed to the position of setting up of board 620.
During the simulated fracturing process of the core sample, the core sample may crack, and if the monitoring sensor tightly attached to the core sample is fixed on the lateral pressurizing member 300 or between the lateral pressurizing member 300 and the core sample, the cracking impact force of the core sample may directly crack the expensive sensor. To avoid this problem, the sensor holder 600 structure described above is specifically provided. The sensor block is fixed between two adjacent elasticity stretch out boards 620, when the rock core sample does not take place to burst, the sensor is laminated with the periphery of rock core sample all the time, and the rock core sample takes place to burst the in-process, butt piece 630 will be acted on immediately by the rock core sample and move to the outside of keeping away from the rock core sample center, because elasticity stretch out board 620 can take place the elastic deformation of buckling for fixed plate 610, elasticity stretch out board 620 and sensor just are moving to the outside simultaneously along with butt piece 630, just so avoided the sensor to burst out by the rock core sample.
Referring to fig. 1 to 4 and 7, as an embodiment of the loading device for rock fracturing simulation of the present invention, a fixing plate 610 is screwed to the lateral pressing member 300. Specifically, be equipped with the fixed plate via hole on the fixed plate 610, be equipped with fixed plate screw hole 321 on the side direction pressure member 300, the embodiment of the utility model provides a loading device that rock fracturing simulation used still includes fixed plate bolt 900, and fixed plate bolt 900's screw rod passes fixed plate via hole and fixed plate screw hole 321 threaded connection to fixed plate 610.
Referring to fig. 7, as a specific embodiment of the loading device for rock fracturing simulation provided by the present invention, the abutting member 630 is a spring. One end of the spring is connected with the elastic extension plate 620, and the other end of the spring is used for being abutted against the core sample. The spring has compressibility, and can buffer part of vibration or shake to protect the sensor due to slight vibration or shake in a simulated fracturing test. Meanwhile, the elastic modulus of the spring is greater than that of the elastic protrusion plate 620, that is, the stiffness of the spring is less than that of the elastic protrusion plate 620. Thus, when the core sample slightly vibrates and shakes, the slight shaking or vibration can be absorbed by the spring, and the elastic extending plate 620 hardly deforms, so that the sensor is kept attached to the core sample, and the sensor is prevented from leaving the core sample due to small shaking; only when the rock core sample is severely deformed like bursting, the spring is compressed to a certain degree, and then the spring drives the elastic extension plate 620 to deform so as to protect the sensor.
Referring to fig. 1 to 3, as a specific embodiment of the loading device for rock fracturing simulation provided by the present invention, there are four lateral pressing members 300, and the four lateral pressing members 3 are arranged uniformly around the circumference of the core sample.
Referring to fig. 1 to 6, as a specific embodiment of the loading device for rock fracturing simulation provided by the present invention, the lateral pressure member 300 is a cylinder structure, the cylinder structure is similar to a 'corner cut structure' of a rectangular parallelepiped, the lateral pressure member 300 has a side group, an upper end surface 330 and a lower end surface 340, the side group includes two vertically arranged and connected side surfaces 320 and a force application surface 310, and two sides of the force application surface 310 are respectively connected to the two side surfaces 320.
Referring to fig. 4, as a specific embodiment of the loading device for rock fracturing simulation provided by the present invention, three sensor insertion holes 350 are respectively disposed on two side surfaces 320 at intervals in a row. Two lateral sides of one lateral pressing member 300 are respectively provided with one sensor fixing member 600, three clamping grooves 640 are correspondingly arranged on the sensor fixing member 600, and one clamping groove 640 is used for corresponding to one sensor insertion hole 350.
Referring to fig. 5 to 6, as a specific embodiment of the loading device for rock fracturing simulation provided by the present invention, an upper boss 331 is disposed on the upper end surface 330 of the lateral pressure member 300, a lower boss 341 is disposed on the lower end surface 340, an upper threaded hole 3311 is disposed on the upper boss 331, and a lower threaded hole 3411 is disposed on the lower boss 341. The upper bosses 331 are adapted to abut against the lower plate surface of the upper cover plate 100, the lower bosses 341 are adapted to abut against the upper plate surface of the lower cover plate 200, the upper surface area of the upper bosses 331 is smaller than the upper surface area of the upper end surface 330, and the lower surface area of the lower bosses 341 is smaller than the lower surface area of the lower end surface 340, so that sliding friction between the lateral pressure member 300 and the upper cover plate 100 or the lower cover plate 200 can be reduced when the lateral pressure member 300 moves relative to the upper cover plate 100 or the lower cover plate 200.
Referring to fig. 3, as a specific embodiment of the loading device for rock fracturing simulation provided by the present invention, the acoustic measurement model top pillar 400 includes a guide pillar 410 and a compression pillar 420 disposed at one end of the guide pillar 410, and the lower cover plate 200 is provided with a guide hole for the guide pillar 410 to pass through. The compression column 420 is arranged between the upper cover plate 100 and the lower cover plate 200 and is used for applying axial force to the core sample, the guide column 410 is used for being connected with a power output end of the axial pressurizing mechanism, and the guide column 410 slides up and down in the guide hole.
Referring to fig. 2 to 3, as a specific embodiment of the loading device for rock fracturing simulation provided by the present invention, a guide cylinder 220 is fixedly disposed at a lower portion of a lower cover plate 200, and a guide post 410 is located in the guide cylinder 220 and can slide up and down in the guide cylinder 220. The guide cylinder 220 may provide a better guiding function for the up and down movement of the guide post 410.
Please refer to fig. 2 to 3, as the utility model provides a loading device for rock fracturing simulation's a specific implementation, the periphery of guide cylinder 220 is equipped with at least one guide cylinder screw hole, the utility model provides a loading device for rock fracturing simulation still includes with guide cylinder screw hole threaded connection and is used for butt location guide post 410's guide post positioning bolt 700. The guide column 410 has a gap with the guide cylinder 220 and the guide hole, and the position of the guide column 410 in the guide cylinder 220 and the guide hole can be adjusted by arranging the guide column positioning bolt 700, so that the central axis of the compression column 420 is approximately coincident with the central axis of the core sample. Meanwhile, the guide post positioning bolt 700 can also pre-fix the guide post 410 on the lower cover plate 200 by using the abutment, so as to facilitate the subsequent connection operation of the guide post 410 and the power output end of the axial pressurizing mechanism.
Referring to fig. 1 and 3, as a specific embodiment of the loading device for rock fracturing simulation provided by the present invention, an upper cover plate 100 is further provided with an upper through hole 120, so as to pour fracturing fluid into a process hole of a core sample in a fracturing simulation test.
Referring to fig. 6, as a specific embodiment of the loading device for rock fracturing simulation provided by the present invention, the force application surface is an arc surface 310. The curved surface 310 may provide surface contact with a cylindrical core sample of a suitable size and line contact with a cylindrical core sample of a non-suitable size, and in any case the curved surface 310 may provide the axial force required for simulated fracturing for cylindrical core samples of various sizes.
The utility model also provides a rock fracturing analog device, the loading device that rock fracturing simulation in the above-mentioned embodiment was used.
The embodiment of the utility model provides a rock fracturing analog device compares with prior art, through setting up the loading device who is independent of main body frame, the loading and the taking out of the rock core sample of being convenient for, also be convenient for wash, be equipped with in the loading device that rock fracturing simulation was used simultaneously and can be for upper cover plate or apron gliding side direction pressurization piece down for this equipment can simulate the loading test to the cylinder type rock core sample of different external diameter sizes.
As the utility model provides a concrete implementation mode of rock fracturing simulation equipment, the embodiment of the utility model provides a rock fracturing simulation equipment still includes main body frame, axial loading mechanism, radial loading mechanism and cyclic annular confined pressure mechanism. The axial pressurizing mechanism, the radial pressurizing mechanism and the annular confining pressure mechanism are all installed on the main body frame, the main body frame is provided with a rock sample chamber, and the loading device for rock fracturing simulation is placed in the rock sample chamber after a rock core sample is loaded.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Loading device that rock fracturing simulation was used, detachably place in the rock ventricle room, its characterized in that includes:
the upper cover plate is arranged above the core sample;
the lower cover plate is arranged below the core sample;
the lateral pressurizing pieces are provided with at least two force applying surfaces used for transmitting radial force to the core sample; and
the acoustic measurement module top column is in up-and-down sliding fit with the upper cover plate or the lower cover plate and is used for transmitting axial force to the core sample;
the upper cover plate, the lower cover plate and the lateral pressurizing piece enclose a loading space for placing a core sample, and the lateral pressurizing piece is further used for sliding along the radial direction of the core sample and relative to the upper cover plate or the lower cover plate.
2. The loading device for rock fracture simulation according to claim 1, wherein the upper cover plate is provided with a plurality of upper sliding holes for being arranged along the radial direction of the core sample, the lower cover plate is provided with a plurality of lower sliding holes for being arranged along the radial direction of the core sample, and each upper sliding hole, each lower sliding hole and each lateral pressurizing piece are respectively in one-to-one correspondence;
the loading device for rock fracturing simulation further comprises a plurality of thread screwing assemblies, each thread screwing assembly is in one-to-one correspondence with each lateral pressurizing piece, an upper threaded hole is formed in the upper portion of each lateral pressurizing piece, a lower threaded hole is formed in the lower portion of each lateral pressurizing piece, and each thread screwing assembly comprises an upper thread screwing piece which is arranged in the upper sliding hole in a sliding mode and is in threaded connection with the upper threaded hole and a lower thread screwing piece which is arranged in the lower sliding hole in a sliding mode and is in threaded connection with the lower threaded hole.
3. The loading device for rock fracture simulation according to claim 2, wherein the lateral pressure member is provided with at least one sensor insertion hole for allowing the sensor to pass through and to be attached to the outer periphery of the core sample.
4. The loading device for rock fracture simulation of claim 3, further comprising a plurality of sensor fixing members, wherein the sensor fixing members are mounted on the lateral pressurizing members, the sensor fixing members are provided with at least one clamping groove for clamping the sensors, and each clamping groove is in one-to-one correspondence with each sensor jack.
5. The loading device for rock fracture simulation according to claim 4, wherein the sensor fixing member comprises a fixing plate, a plurality of elastic extending plates fixedly arranged on the fixing plate, and a plurality of abutting members for abutting against the periphery of the core sample, and each abutting member is respectively arranged on the corresponding elastic extending plate; the clamping groove is arranged between the two adjacent elastic extension plates.
6. A loading device for rock fracture simulation according to claim 5, wherein the abutment is a spring.
7. A loading unit for rock fracture simulation according to any one of claims 1 to 6, wherein there are four lateral compression members, four of which are arranged evenly around the circumference of the core sample.
8. A loading unit for rock fracture simulation according to any one of claims 1 to 6, wherein the lateral pressure member is a cylindrical structure having a side group, an upper end surface and a lower end surface, the side group comprises two vertically arranged and connected side surfaces and the force application surface, and two sides of the force application surface are respectively connected with the two side surfaces.
9. A loading device for rock fracture simulation according to any one of claims 1 to 6, wherein the acoustic modeling top column comprises a guide column and a compression column arranged at one end of the guide column and located between the upper cover plate and the lower cover plate, and the lower cover plate is provided with a guide hole for the guide column to pass through.
10. A loading unit for rock fracture simulation according to any one of claims 1 to 6, wherein the force application surface is an arcuate surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922492920.0U CN211784823U (en) | 2019-12-31 | 2019-12-31 | Loading device for rock fracturing simulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111122335A (en) * | 2019-12-31 | 2020-05-08 | 中国地质大学（北京） | Loading device for rock fracturing simulation and rock fracturing simulation equipment |
| CN115791393A (en) * | 2022-11-25 | 2023-03-14 | 河南省地质调查院 | A loading device for rock fracturing simulation |
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2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111122335A (en) * | 2019-12-31 | 2020-05-08 | 中国地质大学（北京） | Loading device for rock fracturing simulation and rock fracturing simulation equipment |
| CN115791393A (en) * | 2022-11-25 | 2023-03-14 | 河南省地质调查院 | A loading device for rock fracturing simulation |
| CN115791393B (en) * | 2022-11-25 | 2023-08-15 | 河南省地质研究院 | Loading device for rock fracturing simulation |
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