Carbon dioxide fracturing test device

Abstract

The utility model discloses a carbon dioxide fracturing test device which comprises a base, two fixed wallboards are oppositely arranged on the base front and back, at least two guide shafts are connected between the two fixed wallboards, a first sliding wallboard and a second sliding wallboard are arranged on the guide shafts, a container used for loading a sample is fixedly installed on the first sliding wallboard, and a second sliding wallboard is fixedly installed on the second sliding wallboard. An opening is formed in the front side of the container and faces the second sliding wall plate, a first ballasting assembly and a first bearing assembly are arranged on the inner wall of the container in an up-down opposite mode, a second ballasting assembly and a second bearing assembly are arranged on the inner wall of the container in a left-right opposite mode, and the first ballasting assembly and the second ballasting assembly are the same in structure and comprise a bearing plate, a heating plate and a ballasting plate; the first bearing assembly and the second bearing assembly are the same in structure, and each bearing assembly comprises a bearing plate and a heating plate. The device is used for researching crack initiation and expansion forms of the sample under different pressure and temperature conditions, provides parameters for actual field application, and has good actual application reference value.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon dioxide fracturing, in particular to a carbon dioxide fracturing test device. Background Art

[0002] Fracking is a widely used technology in energy extraction. Carbon dioxide (CO2) fracking is a variant of fracking that uses CO2 gas instead of the water and chemical liquids used in traditional fracking. CO2 fracking works by injecting high-pressure CO2 gas into underground oil and gas reservoirs, creating cracks in the rock layer and releasing the underlying oil and gas. This technology operates under high pressure and high temperature, requiring high-pressure compressors and high-temperature equipment. Currently, CO2 fracking technology is still in its developmental stages, and the related processes are immature. Therefore, it is necessary to design a CO2 fracking test device to conduct relevant theoretical research. Utility Model Content

[0003] The purpose of this utility model is to provide a carbon dioxide fracturing test device, aiming to solve at least one of the technical problems existing in the above-mentioned prior art. To achieve the above-mentioned purpose, the technical solution adopted is as follows:

[0004] The carbon dioxide fracturing test device includes a base, two fixed wall panels are provided on the base in front and back opposite directions, at least two parallel guide shafts are vertically connected between the two fixed wall panels, a first sliding wall panel and a second sliding wall panel are provided on the guide shafts, a container for loading samples is fixedly installed on the first sliding wall panel, the front side of the container is open, and the opening faces the second sliding wall panel, and sliding the second sliding wall panel can block the opening of the container, a first ballast assembly and a first load-bearing assembly are provided in upper and lower opposite directions on the inner wall of the container, and a second ballast assembly and a second load-bearing assembly are provided in left and right opposite directions on the inner wall of the container, the first ballast assembly and the second ballast assembly have the same structure, including a pressure plate, a heating plate and a ballast plate arranged in sequence from the outside to the inside, and the first load-bearing assembly and the second load-bearing assembly have the same structure, including a pressure plate and a heating plate arranged in sequence from the outside to the inside.

[0005] Preferably, a plurality of electric heating tubes are pre-buried in the heating plate.

[0006] Preferably, a plurality of hydraulic cylinders are provided in the ballast plate, and each hydraulic cylinder is connected to an external oil pump via an oil pipe passing through the side wall of the container.

[0007] Preferably, the device further comprises a sonicator, and a detection probe of the sonicator is arranged on the surface of the sample.

[0008] Preferably, there are four guide shafts, and they are arranged in a square shape.

[0009] Preferably, a connecting piece is provided on the rear outer wall of the container, and the container can be fixedly connected to the corresponding fixed wall panel through the connecting piece.

[0010] Preferably, the second sliding wall panel is provided with a through hole, through which carbon dioxide is injected into the sample.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The utility model discloses a carbon dioxide fracturing test device, which is used to study the crack initiation and expansion morphology of a sample under different pressure and temperature conditions, provides parameters for actual field application, has good practical application reference value, and has certain practical significance for promoting the development of carbon dioxide fracturing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for use in the implementation. Obviously, the drawings described below are only some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model device.

[0015] Figure 2 It is a schematic diagram of the internal structure of the container of the present utility model.

[0016] In the figure: 1. base; 2. fixed wall panel; 3. guide shaft; 4. first sliding wall panel; 5. second sliding wall panel; 6. container; 7. sample; 8. connecting piece; 9. first ballast assembly; 10. first load-bearing assembly; 11. second ballast assembly; 12. second load-bearing assembly. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0018] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0019] like Figure 1As shown, a preferred embodiment of the present invention provides a carbon dioxide fracturing test device, which includes a base 1, which is a platform. Two fixed wall panels 2 are provided on the base 1 in front and back opposite positions. Specifically, the fixed wall panels 2 are fixedly connected to the base 1 by welding or bolts.

[0020] At least two guide shafts 3 are connected between the two fixed wall panels 2. The utility model preferably has four guide shafts 3 connected. Specifically, any two guide shafts 3 are parallel, and both ends of each guide shaft 3 are vertically fixedly connected to the corresponding fixed wall panels 2, and the four guide shafts 3 are arranged in a square.

[0021] A first sliding wall panel 4 and a second sliding wall panel 5 are mounted on the guide shaft 3, allowing both panels to slide freely along the guide shaft 3. A container 6 for loading the sample is fixedly mounted on the first sliding wall panel 4. The front of the container 6 is open, facing the second sliding wall panel 5. The sample 7 is placed into the container 6 through this opening. After loading, the second sliding wall panel 5 is slid across the opening of the container 6. Connectors 8 are provided on the rear outer wall of the container 6. By sliding the first sliding wall panel 4 to the appropriate position, the container 6 is securely connected to the corresponding fixed wall panel via connectors 8, preventing displacement of the container 6 during testing.

[0022] A through hole is provided in the middle of the second sliding wall panel 5, and an external device injects carbon dioxide into the sample through the through hole.

[0023] like Figure 2 As shown, a first ballast assembly 9 and a first load-bearing assembly 10 are provided opposite to each other on the upper and lower sides of the inner wall of the container 6, and a second ballast assembly 11 and a second load-bearing assembly 12 are provided opposite to each other on the left and right sides of the inner wall of the container 6. The first ballast assembly 9 and the second ballast assembly 11 have the same structure, including a pressure plate, a heating plate and a ballast plate arranged in sequence from the outside to the inside, and the first load-bearing assembly 10 and the second load-bearing assembly 12 have the same structure, including a pressure plate and a heating plate arranged in sequence from the outside to the inside.

[0024] Among them, several electric heating tubes are embedded in the heating plate to provide a controllable high-temperature environment for the sample.

[0025] Among them, multiple hydraulic cylinders are provided in the ballast plate, and each hydraulic cylinder is connected to an external oil pump through an oil pipe passing through the side wall of the container. Specifically, the ballast plate in the first ballast assembly 9 provides pressure in the up and down directions for the sample 7, and the ballast plate in the second ballast assembly 11 provides pressure in the left and right directions for the sample 7.

[0026] The device also includes an ultrasonic instrument (not shown in the figure). The detection probe of the ultrasonic instrument is arranged on the surface of the sample. As carbon dioxide is injected, cracks will appear in the sample. The ultrasonic instrument can detect the size and development process of the cracks in the sample.

[0027] The present application provides a carbon dioxide fracturing test device for studying the crack initiation and expansion morphology of a sample under different pressure and temperature conditions, providing parameters for actual field applications, having good practical application reference value, and having certain practical significance for promoting the development of carbon dioxide fracturing technology.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A carbon dioxide fracturing test device, characterized in that: The container is constructed by rotating the container to move the load board to the next level, the container being mounted on a vertical axis and the like, wherein the container is arranged on a horizontal axis and the load board is moved along the load board to move the load board to the next level.

2. The carbon dioxide fracturing test device according to claim 1, characterized in that: A plurality of electric heating tubes are pre-buried in the heating plate.

3. The carbon dioxide fracturing test device according to claim 1, characterized in that: A plurality of hydraulic cylinders are provided in the ballast plate, and each hydraulic cylinder is connected to an external oil pump via an oil pipe passing through the side wall of the container.

4. The carbon dioxide fracturing test device according to claim 1, characterized in that: The device also includes a sonicator, and a detection probe of the sonicator is arranged on the surface of the sample.

5. The carbon dioxide fracturing test device according to claim 1, characterized in that: There are four guide shafts, which are arranged in a square shape.

6. The carbon dioxide fracturing test device according to claim 1, characterized in that: The rear outer wall of the container is provided with a connecting piece, and the container can be fixedly connected to the corresponding fixed wallboard through the connecting piece.

7. The carbon dioxide fracturing test device according to claim 1, characterized in that: The second sliding wall panel is provided with a through hole, through which carbon dioxide is injected into the sample.

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