CN114910358A - Full-diameter core fracturing crack-making evaluation instrument - Google Patents
Full-diameter core fracturing crack-making evaluation instrument Download PDFInfo
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- CN114910358A CN114910358A CN202110171489.9A CN202110171489A CN114910358A CN 114910358 A CN114910358 A CN 114910358A CN 202110171489 A CN202110171489 A CN 202110171489A CN 114910358 A CN114910358 A CN 114910358A
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- 238000011156 evaluation Methods 0.000 title claims abstract description 17
- 239000000523 sample Substances 0.000 claims abstract description 99
- 239000012530 fluid Substances 0.000 claims abstract description 51
- 238000002347 injection Methods 0.000 claims abstract description 29
- 239000007924 injection Substances 0.000 claims abstract description 29
- 238000000605 extraction Methods 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 12
- 239000011148 porous material Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 51
- 230000015572 biosynthetic process Effects 0.000 abstract description 23
- 238000012360 testing method Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 3
- 210000003484 anatomy Anatomy 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 239000000700 radioactive tracer Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
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Abstract
The invention provides a full-diameter core fracturing crack-making evaluation instrument, which comprises: the core sample receiving device comprises a barrel, a core sample receiving cavity and a core sample receiving cavity, wherein the barrel is provided with a receiving cavity for receiving a core sample; the core base is connected with the bottom of the cylinder, and the core sample is supported on the core base; the pressure device extends into the accommodating cavity and can apply pressure to the core sample from top to bottom, and a fracturing fluid injection port and a fracturing fluid extraction port are respectively formed in the top end and the bottom end of the core sample; the ultrasonic probes are arranged at the top end and the bottom end of the rock core sample and can excite longitudinal and transverse waves, and the positions and the forms of the fracturing cracks are detected through different propagation speeds of the sound waves in different media and the time difference of the received sound waves. The invention solves the problems that the rock mechanics testing machine in the prior art can not judge the position and time node of the rock crack generation and can not clearly observe the form of the internal crack formation of the rock and the trend of the crack formation.
Description
Technical Field
The invention relates to the technical field of rock mechanics, in particular to a full-diameter core fracturing crack-making evaluation instrument.
Background
The mechanical parameter characteristics of reservoir rock and simulation data in a fracturing chamber are important basis for designing reservoir transformation parameters, and the crack forming condition and the crack cracking degree are also important problems in the fracturing transformation. A rock three-dimensional fracture simulation experiment is an important means for researching rock mechanics, and data of the rock three-dimensional fracture simulation experiment is an important parameter of the rock mechanics. The rock three-dimensional crack-making simulation experiment can completely simulate the mechanical property of rock and soil in the original stress state, and is an important basis for engineering design. Because deep rocks are in a complex stress state, most rocks or ore bodies encountered in mining engineering are in a three-dimensional stress state, and the deep rocks or ore bodies are also a very complex natural material, in many cases, a rock stress test in a simple stress state cannot completely reflect the rock stress state in the engineering practice, and the mechanical properties of the rocks in the complex stress state must be fully known.
The existing rock mechanics testing machine basically belongs to standard equipment, axial pressure, confining pressure and pore pressure parameters of the existing rock mechanics testing machine are standard parameters, rock deformation parameters are mainly detected by a high-precision displacement sensor, positions and time nodes generated by rock cracks cannot be judged, and the forms of the internal cracks of the rocks and the trends of the cracks cannot be clearly observed.
Disclosure of Invention
The invention mainly aims to provide a full-diameter core fracturing crack-making evaluation instrument to solve the problems that a rock mechanics testing machine in the prior art cannot judge the position and time node of rock crack generation, and the form of the internal crack formation of rock and the crack formation trend cannot be clearly observed.
In order to achieve the above object, the present invention provides a full diameter core fracture crack evaluation instrument, comprising: the core sample receiving device comprises a barrel, a core sample receiving cavity and a core sample receiving cavity, wherein the barrel is provided with a receiving cavity for receiving a core sample; the core base is connected with the bottom of the cylinder body, and the core sample is supported on the core base; the pressure device extends into the accommodating cavity and can apply pressure to the core sample from top to bottom, a fracturing fluid injection port and a fracturing fluid extraction port are respectively formed in the top end and the bottom end of the core sample, the fracturing fluid injection port is used for injecting fracturing fluid, and when the injection pressure is greater than the fracture pressure of the core sample per se, the core sample generates cracks and the fracturing fluid can be discharged from the fracturing fluid extraction port; the ultrasonic probes are arranged at the top end and the bottom end of the rock core sample and can excite longitudinal and transverse waves, and the positions and the forms of the fracturing cracks are detected through different propagation speeds of the sound waves in different media and the time difference of the received sound waves.
Furthermore, the top end and the bottom end of the core sample are respectively provided with a core upper plug and a core lower plug, the core upper plug is positioned between the pressure device and the core sample, the fracturing fluid injection port is formed in the core upper plug, the core lower plug is positioned between the core sample and the core base, and the fracturing fluid extraction port is formed in the core lower plug.
Furthermore, the ultrasonic probes are installed on the core upper plug and the core lower plug, a plurality of ultrasonic probes are arranged on the core upper plug and the core lower plug respectively, the ultrasonic probes are electrically connected with the ultrasonic signal amplifier sequentially through the ultrasonic coaxial cable and the coaxial wire harness sealing structure, and the ultrasonic signal amplifier is electrically connected with system software used for generating a core crack form three-dimensional effect diagram.
Further, coaxial line pencil seal structure inlays to be installed in the rock core base.
Further, the pressure device comprises an axial pressure chamber and an axial piston, the axial pressure chamber is mounted at the top end of the cylinder, the axial piston is slidably mounted in the axial pressure chamber, and the bottom end of the axial piston extends into the cylinder and can apply pressure to the core sample.
Furthermore, the top of the axial pressure chamber is connected with a pressure applying hydraulic cylinder for sealing between the cylinder body and the core base.
Furthermore, the full-diameter core fracturing crack-making evaluation instrument further comprises an axial top cover and/or a core cushion block with different thicknesses, wherein the axial top cover is used for being installed at the top of the core sample, and the core cushion block is used for being arranged at the bottom of the core sample in a cushioning mode.
Furthermore, full diameter core fracturing makes seam evaluation appearance still includes the rubber sleeve, and the outside of rock core sample is located to the rubber sleeve cover to a fluid medium for keeping apart confined pressure and pore pressure.
Further, full diameter core fracturing makes seam evaluation appearance still includes the cushion, and the cushion sets up the bottom at the core base.
Furthermore, a fracturing fluid injection port is connected with an injection pump, and the injection pump is used for injecting fracturing fluid into the core sample in a constant pressure mode.
By applying the technical scheme of the invention, the form of the rock crack formation and the crack formation trend are detected by adopting ultrasonic waves, the position and time node of the rock crack formation can be accurately judged, and the form of the crack formation and the crack formation trend in the rock can be clearly observed. Meanwhile, due to the adoption of a mechanical structure loaded by high-temperature high-pressure triaxial pressure, the experimental process has a three-dimensional visual effect, and compared with the existing fracturing hydraulic fracturing adopting a tracer, the experimental method has the advantages that the effect is more direct and the experimental process is clearer through the method of anatomy verification after the experiment. And the full diameter core fracturing fracture-making evaluation appearance of this embodiment overall structure is compact reasonable, uses easy operation convenience.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a schematic structural diagram of a full-diameter core fracture-making evaluator of the present invention;
FIG. 2 shows a schematic structural view of an upper core plug of the full-diameter core fracture and crack formation evaluator of FIG. 1;
FIG. 3 shows a schematic view of the installation of an ultrasonic probe in the lower core plug of the full diameter core fracture and crack formation evaluator of FIG. 1;
FIG. 4 shows a three-dimensional effect plot at a first time using the full-diameter core fracture-making evaluator of the present invention;
FIG. 5 shows a three-dimensional effect plot at a second time using the full-diameter core fracture crack formation evaluator of the present invention;
FIG. 6 shows a three-dimensional effect plot at a third time using the full-diameter core fracture-making evaluator of the present invention;
fig. 7 shows a three-dimensional effect graph at a fourth time using the full-diameter core fracture-making evaluator of the present invention.
Wherein the figures include the following reference numerals:
1. an axial pressure chamber; 2. an axial piston; 3. a barrel; 4. an axial top cover; 5. plugging the core; 6. an ultrasonic coaxial cable; 7. a core lower plug; 8. a core cushion block; 9. a coaxial wire harness sealing structure; 10. a core base; 11. an ultrasonic probe; 12. a core sample; 13. a rubber sleeve; 14. cushion blocks; 15. a fracturing fluid injection port; 16. and a fracturing fluid extraction port.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.
The invention provides a full-diameter core fracturing crack-making evaluation instrument, aiming at solving the problems that a rock mechanics testing machine in the prior art cannot judge the position and time node of rock crack generation and cannot clearly observe the form of internal rock crack formation and the crack formation trend.
The full-diameter core fracturing crack-making evaluation instrument shown in fig. 1 comprises a cylinder 3, a core base 10, a pressure applying device and a plurality of ultrasonic probes 11, wherein the cylinder 3 is provided with an accommodating cavity for accommodating a core sample 12; the core base 10 is connected with the bottom of the cylinder 3, and the core sample 12 is supported on the core base 10; the pressing device extends into the accommodating cavity and can apply pressure to the core sample 12 from top to bottom, the top end and the bottom end of the core sample 12 are respectively provided with a fracturing fluid injection port 15 and a fracturing fluid extraction port 16, the fracturing fluid injection port 15 is used for injecting fracturing fluid, and when the injection pressure is greater than the fracture pressure of the core sample 12 per se, the core sample 12 cracks and the fracturing fluid can be discharged from the fracturing fluid extraction port 16; the top end and the bottom end of the core sample 12 are provided with ultrasonic probes 11, the ultrasonic probes 11 can excite longitudinal and transverse waves, and the position and the form of a fracture are detected through different propagation speeds of sound waves in different media and the time difference of the received sound waves.
According to the method, the form of the rock crack formation and the crack formation trend are detected by adopting ultrasonic waves, the position and the time node of the rock crack generation can be accurately judged, and the form of the rock internal crack formation and the crack formation trend are clearly observed. Meanwhile, due to the adoption of a mechanical structure loaded by high-temperature high-pressure triaxial pressure, the experimental process has a three-dimensional visual effect, and compared with the existing fracturing fluid fracturing adopting a tracer, the experimental method has the advantages that the effect is more direct and the experimental process is clearer through the method of anatomy verification after the experiment. And the full diameter core fracturing fracture-making evaluation appearance of this embodiment overall structure is compact reasonable, uses easy operation convenience.
In this embodiment, the top end and the bottom end of the core sample 12 are respectively provided with an upper core plug 5 and a lower core plug 7, the upper core plug 5 is located between the pressing device and the core sample 12, the fracturing fluid injection port 15 is formed in the upper core plug 5, the lower core plug 7 is located between the core sample 12 and the core base 10, and the fracturing fluid extraction port 16 is formed in the lower core plug 7. The fracturing fluid injection port 15 and the fracturing fluid extraction port 16 can provide 100MPa of pore pressure, the fracturing fluid injection port 15 is connected with an injection pump, and the injection pump is used for injecting fracturing fluid into the rock core sample 12 in a constant pressure mode. The upper core plug 5 and the lower core plug 7 are used for forming a fracturing fluid injection port 15 and a fracturing fluid extraction port 16, the fracturing fluid injection port 15 and the fracturing fluid extraction port 16 are formed in an L shape, one end of each of the fracturing fluid injection port 15 and the fracturing fluid extraction port 16 is exposed out of the side face of the upper core plug 5 or the lower core plug 7, and the other end of each of the fracturing fluid injection port and the fracturing fluid extraction port is located in the center of the upper core plug 5 or the lower core plug 7, so that the fracturing fluid can act on the core sample 12.
In addition to the fracturing fluid injection port 15 and the fracturing fluid extraction port 16 being formed in the upper core plug 5 and the lower core plug 7, the ultrasonic probe 11 is installed on the upper core plug 5 and the lower core plug 7, specifically, as shown in fig. 2, grooves are formed on the end surfaces of the core upper plug 5 and the core lower plug 7 away from the center of the core sample 12, the ultrasonic probe 11 is inserted into the grooves, the connector lug of the ultrasonic probe 11 leads out the core upper plug 5 and the core lower plug 7, the ultrasonic probe 11 is electrically connected with the ultrasonic signal amplifier sequentially through the ultrasonic coaxial cable 6 and the coaxial wire harness sealing structure 9, the ultrasonic signal amplifier is electrically connected with system software for generating a core crack form three-dimensional effect diagram, the detected signals are transmitted to the existing system software, and the system software analyzes and processes the signals to form the required three-dimensional effect map.
Preferably, a plurality of ultrasonic probes 11 are arranged on both the core upper plug 5 and the core lower plug 7. In this embodiment, the setting forms of the ultrasonic probes 11 on the core upper plug 5 and the core lower plug 7 are the same, taking the core lower plug 7 as an example, a plurality of ultrasonic probes 11 are installed in the core upper plug 5, one of the ultrasonic probes 11 is located at the center of the core lower plug 7, and the other ultrasonic probes 11 surround the ultrasonic probe 11 at the center, for example, five ultrasonic probes 11 are installed on the core lower plug 7 in this embodiment, one of the ultrasonic probes 11 is located at the center, and the other four ultrasonic probes 11 surround the ultrasonic probe 11 at the center, as shown in fig. 3. The ultrasonic probe 11 at the center is connected to the P wave of the ultrasonic signal amplifier, the two ultrasonic probes 11 circumferentially opposite at the center are connected to the S1 wave of the ultrasonic signal amplifier, and the other two ultrasonic probes 11 opposite at the center are connected to the S2 wave of the ultrasonic signal amplifier, that is, in fig. 3, the joint at the right end is connected to the P wave, the joint at the upper left end is connected to the S1 wave, and the joint at the lower left end is connected to the S2 wave. Of course, the specific arrangement and connection of the ultrasonic probe 11 may be changed as required.
In this embodiment, the coaxial cable harness sealing structure 9 is longitudinally embedded and installed on the core base 10 and penetrates through the core base 10, and the ultrasonic coaxial cable 6 penetrates through the coaxial cable harness sealing structure 9, so as to penetrate through the core base 10 and penetrate out of the accommodating cavity, and then can be connected to the ultrasonic signal amplifier. The sealing effect of the accommodating cavity can be ensured by the arrangement of the coaxial wire harness sealing structure 9.
The pressing device of the embodiment comprises an axial pressure chamber 1 and an axial piston 2, wherein the axial pressure chamber 1 is installed at the top end of a cylinder 3, the axial piston 2 is installed in the axial pressure chamber 1 in a sliding mode, and the bottom end of the axial piston 2 extends into the cylinder 3 and can press a core sample 12. Barrel 3, axial pressure chamber 1 and axial piston 2 three constitute a hydraulic piston structure, mainly give the up end of rock core sample 12 and act on a decurrent axial force, can design the axial force that does not exceed 2500KN as required.
The top of the axial pressure chamber 1 of this embodiment is connected with a pressure-applying hydraulic cylinder for sealing between the barrel 3 and the core base 10. The cylinder 3 and the core base 10 can form a high-pressure-resistant containing cavity, 100MPa confining pressure can be designed according to requirements, the containing cavity can be sealed by a 5000KN pressure applying hydraulic cylinder acting on the axial pressure chamber 1 to provide downward pressure, and the cylinder 3 and the core base 10 are sealed together.
In this embodiment, the full-diameter core fracture crack-making evaluator further comprises an axial top cover 4 and/or a core cushion block 8 with different thicknesses, the axial top cover 4 is used for being installed at the top of the core sample 12, and the core cushion block 8 is used for being padded at the bottom of the core sample 12. Can make the rock core sample 12 homoenergetic of various lengths fix in holding the intracavity through the axial top cap 4 and the rock core cushion 8 that set up different thickness, guarantee simultaneously that axial piston 2 can exert pressure for rock core sample 12 according to the mode of predicting, avoid because of the different condition that causes the stroke of axial piston 2 of 12 length differences of rock core sample, improve the adaptability and the reliability of full diameter rock core fracturing crack evaluation appearance.
In this embodiment, the full-diameter core fracture crack-making evaluator further includes a rubber sleeve 13, and the rubber sleeve 13 is sleeved outside the core sample 12 and is used for isolating fluid media of confining pressure and pore pressure, so that the core sample 12 is tested in a triaxial pressure environment.
Optionally, the full-diameter core fracture crack formation evaluator further comprises a cushion block 14, and the cushion block 14 is detachably arranged at the bottom of the core base 10 and serves as a supporting and buffering component.
The three-dimensional effect graphs shown in fig. 4 to 7 can be obtained by performing a test by using the full-diameter core fracturing fracture-making evaluator of the embodiment, wherein fig. 4 to 7 are three-dimensional effect graphs respectively obtained at a first time, a second time, a third time and a fourth time as the test time increases in sequence, small points in the graphs indicate positions where fractures are generated, the small points are fitted to generate one way of fractures, the generated fractures are larger and larger as the number of the small points is larger, and the development trend of the fractures can be indicated according to the sequence of the generation of the small points.
It should be noted that, a plurality in the above embodiments means at least two.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
1. the problems that the rock mechanics testing machine in the prior art cannot judge the position and time node of the rock crack generation and cannot clearly observe the form of the internal crack formation of the rock and the trend of the crack formation are solved;
2. the form and the trend of the formation of the rock cracks are detected by adopting ultrasonic waves, the position and the time node of the generation of the rock cracks can be accurately judged, and the form and the trend of the formation of the cracks in the rock are clearly observed;
3. the high-temperature high-pressure triaxial pressure loading mechanical structure is adopted, so that the experimental process has a three-dimensional visual effect, the effect is more direct, and the experimental process is clearer;
4. the whole structure is compact and reasonable, and the use and the operation are simple and convenient.
It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in other sequences than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a full diameter core fracturing makes seam evaluation appearance which characterized in that includes:
the device comprises a barrel (3), wherein the barrel (3) is provided with a containing cavity for containing a core sample (12);
the core base (10), the core base (10) is connected with the bottom of the barrel (3), and the core sample (12) is supported on the core base (10);
the pressing device extends into the containing cavity and can apply pressure to the core sample (12) from top to bottom, a fracturing fluid injection port (15) and a fracturing fluid extraction port (16) are respectively formed in the top end and the bottom end of the core sample (12), the fracturing fluid injection port (15) is used for injecting fracturing fluid, and when the injection pressure is larger than the fracture pressure of the core sample (12) per se, the core sample (12) cracks and the fracturing fluid can be discharged from the fracturing fluid extraction port (16);
the core sample detection device comprises a plurality of ultrasonic probes (11), wherein the ultrasonic probes (11) are arranged at the top end and the bottom end of the core sample (12), longitudinal and transverse waves can be excited by the ultrasonic probes (11), and the positions and the forms of the fracturing fractures can be detected through different propagation speeds of sound waves in different media and the time difference of the received sound waves.
2. The full-diameter core fracturing crack-making evaluation instrument according to claim 1, wherein the top end and the bottom end of the core sample (12) are respectively provided with an upper core plug (5) and a lower core plug (7), the upper core plug (5) is positioned between the pressure applying device and the core sample (12), the fracturing fluid injection port (15) is formed in the upper core plug (5), the lower core plug (7) is positioned between the core sample (12) and the core base (10), and the fracturing fluid extraction port (16) is formed in the lower core plug (7).
3. The full-diameter core fracturing crack-making evaluation instrument as claimed in claim 2, wherein the ultrasonic probes (11) are installed on the core upper plug (5) and the core lower plug (7), a plurality of ultrasonic probes (11) are arranged on the core upper plug (5) and the core lower plug (7), the ultrasonic probes (11) are electrically connected with the ultrasonic signal amplifier sequentially through the ultrasonic coaxial cable (6) and the coaxial wire harness sealing structure (9), and the ultrasonic signal amplifier is electrically connected with system software for generating a core crack form three-dimensional effect diagram.
4. The full-diameter core fracturing crack-making evaluator as claimed in claim 3, wherein the coaxial wire harness sealing structure (9) is embedded in the core base (10).
5. The full-diameter core fracturing crack-making evaluator according to claim 1, wherein the pressure applying device comprises an axial pressure chamber (1) and an axial piston (2), the axial pressure chamber (1) is installed at the top end of the cylinder (3), the axial piston (2) is installed in the axial pressure chamber (1) in a sliding manner, and the bottom end of the axial piston (2) extends into the cylinder (3) and can apply pressure to the core sample (12).
6. The full-diameter core fracturing crack-making evaluator according to claim 5, wherein a pressure applying hydraulic cylinder is connected to the top of the axial pressure chamber (1) for sealing between the barrel (3) and the core base (10).
7. The full-diameter core fracturing crack evaluator of claim 1, further comprising an axial cap (4) and/or a core block (8) with different thicknesses, wherein the axial cap (4) is used for being mounted on the top of the core sample (12), and the core block (8) is used for being arranged on the bottom of the core sample (12).
8. The full-diameter core fracturing crack-making evaluator of claim 1, wherein the full-diameter core fracturing crack-making evaluator further comprises a rubber sleeve (13), and the rubber sleeve (13) is sleeved outside the core sample (12) and is used for isolating fluid media of confining pressure and pore pressure.
9. The full-diameter core fracturing crack evaluator of claim 1, further comprising a pad (14), wherein the pad (14) is disposed at the bottom of the core base (10).
10. The full-diameter core fracturing fracture-making evaluator of claim 1, wherein the fracturing fluid injection port (15) is connected to an injection pump, and the injection pump is used for injecting fracturing fluid into the core sample (12) in a constant pressure manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110171489.9A CN114910358A (en) | 2021-02-08 | 2021-02-08 | Full-diameter core fracturing crack-making evaluation instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110171489.9A CN114910358A (en) | 2021-02-08 | 2021-02-08 | Full-diameter core fracturing crack-making evaluation instrument |
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| CN114910358A true CN114910358A (en) | 2022-08-16 |
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| CN202110171489.9A Pending CN114910358A (en) | 2021-02-08 | 2021-02-08 | Full-diameter core fracturing crack-making evaluation instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075044A (en) * | 2021-03-23 | 2021-07-06 | 扬州华宝石油仪器有限公司 | Full-diameter core fracturing slit evaluation instrument |
| CN115639343A (en) * | 2022-10-09 | 2023-01-24 | 安徽理工大学 | Multi-parameter combined test device and method for damage evolution of rock test piece |
-
2021
- 2021-02-08 CN CN202110171489.9A patent/CN114910358A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075044A (en) * | 2021-03-23 | 2021-07-06 | 扬州华宝石油仪器有限公司 | Full-diameter core fracturing slit evaluation instrument |
| CN115639343A (en) * | 2022-10-09 | 2023-01-24 | 安徽理工大学 | Multi-parameter combined test device and method for damage evolution of rock test piece |
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