Tight oil shale reservoir fracturing fluid damage detection device
By designing a fracturing fluid damage detection device in the tight oil shale reservoir, simulating the fracturing process in the oil shale layer, the problem of difficulty in detecting the damage of oil shale reservoir is solved in the existing technology, and direct observation and data recording of the fracturing effect are achieved.
Patent Information
- Application Number
- CN202421910180.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-08
AI Technical Summary
The prior art is difficult to effectively simulate and detect the liquid damage problem of tight oil shale reservoirs during fracturing, especially under the thin interlayer conditions of mud shale-salt rock interaction, and traditional methods are difficult to apply.
A tight oil shale reservoir fracturing fluid damage detection device is designed, including detection shells, simulated oil shale layers, punching sleeves and fracturing mechanisms. By punching holes and injecting pressure into simulated oil shale layers, the fracturing process is simulated, and the expansion of the gap is observed and recorded through pressure-resistant glass.
It realizes liquid damage detection of oil shale reservoirs during fracturing, can truly simulate and observe the expansion of gaps, and provides direct verification of fracturing effects and data analysis support.
Smart Images
Figure CN222994196U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fracturing fluid damage detection equipment, and more particularly to a fracturing fluid damage detection device for tight oil shale reservoirs. Background Art
[0002] Due to the advantages of wide distribution, good preservation, high oil content, and sufficient formation energy, the inter-salt shale oil reservoir is very likely to become a breakthrough point for large-scale industrial development of shale oil. At the same time, the presence of evaporite minerals (salt rock, gypsum, glauberite) also makes the physical and mechanical properties of the inter-salt shale oil reservoir different from those of conventional gas-bearing shale reservoirs, affecting the fracturing and stimulation effect of the reservoir. In order to obtain effective, economical, and successful fracturing effects in the inter-salt shale oil reservoir, fracturing design is often required before implementing hydraulic fracturing development. Fracturing simulation is used to predict the width, length, and direction of fracture development and evaluate the success of fracturing.
[0003] Currently, the simulation methods used mostly rely on commercial numerical simulation software, and the fracturing simulation effect needs to be verified. Indoor physical simulation of hydraulic fracturing is an important means to understand the fracture propagation mechanism and can monitor the actual physical processes of fracture initiation, propagation, and extension. During the hydraulic fracturing process, fractures extend simultaneously in three directions: length, height, and width. In the absence of a barrier layer, the fractures may extend infinitely up and down; if there is a barrier layer, and without sufficient strength and thickness, the fractures may also jump up and down and penetrate or even break through the barrier layer. Under isotropic formation and uniform in-situ stress conditions, the fracture height is relatively easy to predict. When hydraulic fracturing is carried out on thin interbeds of mud shale-salt rock, the rock mechanical properties and in-situ stress distributions between layers are different, and the formed fractures are relatively complex. At this time, the problem of fracture propagation at the interlayer interface must be solved. The mineral composition of the inter-salt shale oil reservoir varies greatly, and the research on the influence of rock components and reservoir saturated fluid states on hydraulic fractures is still blank. The traditional evaluation methods for the compressibility of gas-bearing shale reservoirs and hydraulic fracture characterization techniques are difficult to apply. When hydraulic fracturing is carried out on thin interbeds of mud shale-salt rock, the problem of fracture propagation at the interlayer interface must be solved.
[0004] Previous studies have achieved beneficial results in the establishment of hydraulic fracturing fracture propagation models and numerical simulation of hydraulic fractures. However, current research mostly assumes that the rock mass is homogeneous. Although a few studies have also carried out physical simulation of fracturing and fracture mechanism research on laminated shale, there are still obvious differences from the fracture propagation in thin interbed shale oil reservoirs. Further research and exploration are needed on issues such as the fracture mechanism of thin interbed rock masses (inter-salt shale oil reservoirs) and the true shape of fractures.
[0005] Therefore, it is necessary to develop a device capable of simulating the detection of fracturing fluid damage in tight oil shale reservoirs. Summary of the Utility Model
[0006] To overcome the above defects of the prior art, the present utility model provides a device for detecting the damage of fracturing fluid in a tight oil shale reservoir to solve the problems existing in the above background art.
[0007] The present utility model provides the following technical solutions: A device for detecting the damage of fracturing fluid in a tight oil shale reservoir, including a fixed base, the upper end of the fixed base is fixedly connected with a detection shell, the surface of the detection shell is fixedly connected with a plugging plate through bolts, the plugging plate and the surface of the detection shell are provided with mounting grooves, a pressure-resistant glass is fixedly connected in the mounting grooves, a simulated oil shale layer is arranged in the detection shell, the left end of the detection shell is fixedly connected with a punching sleeve, and a fracturing mechanism is arranged in the punching sleeve.
[0008] Preferably, the upper end of the detection shell is fixedly connected with a pressing plate through bolts, and both the pressing plate and the detection shell are made of metal materials.
[0009] Preferably, the fracturing mechanism includes an injection pipe arranged in the punching sleeve, and injection holes are arranged on the circumferential surface of the injection pipe.
[0010] Preferably, the lower end of the fixed base is fixedly connected with a mounting frame, and a recording probe is fixedly connected to the front end of the mounting frame.
[0011] Preferably, the lower end of the fixed base is fixedly connected with support columns, and shock-absorbing pads are fixedly connected to the lower ends of the support columns.
[0012] Preferably, the upper end of the fixed base is fixedly connected with positioning blocks, and the detection shell is located between the positioning blocks.
[0013] The technical effects and advantages of the present utility model:
[0014] 1. In the present utility model, by placing the simulated oil shale layer in the detection shell, then closing the detection shell, and then under the guiding action of the punching sleeve, holes can be easily drilled in the simulated oil shale layer. Then, the injection pipe in the fracturing mechanism is inserted into the holes, and then pressure is injected into the simulated oil shale layer through the injection pipe, so that the simulated oil shale layer is fractured. At this time, the generated fracture can be observed through the pressure-resistant glass, thus achieving the effect of detecting the fracturing damage of the oil shale.
[0015] 2. In the present utility model, through the recording probe fixedly connected to the front end of the mounting frame, the simulated oil shale layer inside the detection shell can be observed through the pressure-resistant glass, and the images generated by the fracturing of the simulated oil shale layer can be recorded, which is convenient for subsequent data analysis. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model.
[0017] Figure 2 This is the schematic structural diagram of the left view in the present utility model.
[0018] Figure 3 This is the schematic structural diagram of the front view cross-section in the present utility model.
[0019] Figure 4 This is the schematic structural diagram of the split in the present utility model.
[0020] The reference numerals are: 1, fixed base; 2, detection shell; 3, plugging plate; 4, installation groove; 5, pressure-resistant glass; 6, simulated oil shale layer; 7, drilling sleeve; 8, pressing plate; 9, injection pipe; 10, injection hole; 11, installation frame; 12, recording probe; 13, support column; 14, shock pad; 15, positioning block. Specific embodiments
[0021] Next, the technical solutions in the present utility model will be clearly and completely described in conjunction with the drawings in the present utility model. In addition, the forms of each structure described in the following embodiments are merely examples, and a fracturing fluid damage detection device for a tight oil shale reservoir involved in the present utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.
[0022] The present utility model provides a fracturing fluid damage detection device for a tight oil shale reservoir, including a fixed base 1. The upper end of the fixed base 1 is fixedly connected with a detection shell 2. The surface of the detection shell 2 is fixedly connected with a plugging plate 3 through bolts. The plugging plate 3 and the surface of the detection shell 2 are provided with an installation groove 4. A pressure-resistant glass 5 is fixedly connected in the installation groove 4. A simulated oil shale layer 6 is arranged in the detection shell 2. The left end of the detection shell 2 is fixedly connected with a drilling sleeve 7. A fracturing mechanism is arranged in the drilling sleeve 7. During operation, by placing the simulated oil shale layer 6 in the detection shell 2, then closing the detection shell 2, and then under the guiding action of the drilling sleeve 7, holes can be easily drilled in the simulated oil shale layer 6. Then, the injection pipe 9 in the fracturing mechanism is inserted into the holes, and then pressure is injected into the simulated oil shale layer 6 through the injection pipe 9, so that the simulated oil shale layer 6 is fractured. At this time, the generated fracture can be observed through the pressure-resistant glass 5, thus achieving the effect of detecting the fracturing damage of the oil shale.
[0023] Furthermore, the upper end of the detection shell 2 is fixedly connected with a pressing plate 8 through bolts. Both the pressing plate 8 and the detection shell 2 are made of metal. During operation, since both the pressing plate 8 and the detection shell 2 are made of metal, their stability is relatively high, and they will not deform when the simulated oil shale layer 6 is fractured.
[0024] Furthermore, the fracturing mechanism includes an injection pipe 9 disposed within a punching sleeve 7. Injection holes 10 are formed on the circumferential surface of the injection pipe 9. During operation, under the action of the injection pipe 9, pressure can be injected into the simulated oil shale layer 6, thereby achieving the effect of fracturing the simulated oil shale layer 6.
[0025] Furthermore, the lower end of the fixed base 1 is fixedly connected to a mounting bracket 11, and the front end of the mounting bracket 11 is fixedly connected to a recording probe 12. During operation, through the recording probe 12 fixedly connected to the front end of the mounting bracket 11, the images generated by the fracturing of the simulated oil shale layer 6 can be recorded for subsequent analysis.
[0026] Furthermore, the lower end of the fixed base 1 is fixedly connected to a support column 13, and the lower end of the support column 13 is fixedly connected to a shock pad 14. During operation, through the shock pad 14 fixedly connected to the lower end of the support column 13, the effect of shock absorption for the equipment can be achieved, making the equipment highly stable during use.
[0027] Furthermore, the upper end of the fixed base 1 is fixedly connected to positioning blocks 15, and the detection shell 2 is located between the positioning blocks 15. During operation, under the action of the positioning blocks 15, the detection shell 2 can be positioned, facilitating the storage of the detection shell 2.
[0028] The working principle of the present utility model: Place the simulated oil shale layer 6 inside the detection shell 2, then close the detection shell 2. Then, under the action of the positioning blocks 15, the detection shell 2 can be positioned, facilitating the storage and fixation of the detection shell 2 on the fixed base 1. Subsequently, under the guiding action of the punching sleeve 7, holes can be easily drilled in the simulated oil shale layer 6. Then, insert the injection pipe 9 in the fracturing mechanism into the holes. Subsequently, inject pressure into the simulated oil shale layer 6 through the injection pipe 9, thereby causing the simulated oil shale layer 6 to undergo fracturing. At this time, the generated fracturing can be observed through the pressure-resistant glass 5, thus achieving the effect of detecting the fracturing damage of the oil shale. Since both the pressure plate 8 and the detection shell 2 are made of metal materials, their stability is relatively high. When the simulated oil shale layer 6 is subjected to fracturing, no deformation will occur. Through the recording probe 12 fixedly connected to the front end of the mounting bracket 11, the images generated by the fracturing of the simulated oil shale layer 6 can be recorded for subsequent analysis. Moreover, through the shock pad 14 fixedly connected to the lower end of the support column 13, the effect of shock absorption for the equipment can be achieved, making the equipment highly stable during use.
[0029] The following points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and defined, the terms "installed", "connected", and "linked" should be understood in a broad sense, which can be mechanical connection or electrical connection, or the communication inside two components, and can be directly connected. The terms "upper", "lower", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change;
[0030] Second, in the drawings of the disclosed embodiments of the present utility model, only the structures related to the disclosed embodiments are involved. For other structures, reference can be made to the usual designs. Without conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;
[0031] Finally, the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.
Claims
1. A device for detecting damage of fracturing fluid in a tight oil shale reservoir, comprising a fixed base (1), characterized in that: The upper end of the fixed base (1) is fixedly connected to a detection shell (2); a plugging plate (3) is fixedly connected to the surface of the detection shell (2) by means of bolts; a mounting groove (4) is provided between the plugging plate (3) and the surface of the detection shell (2); a pressure-resistant glass (5) is fixedly connected in the mounting groove (4); a simulated oil shale layer (6) is arranged in the detection shell (2); a perforated sleeve (7) is fixedly connected to the left end of the detection shell (2); a fracturing mechanism is arranged in the perforated sleeve (7).
2. A tight oil shale reservoir fracturing fluid damage detection device according to claim 1, characterized in that: The upper end of the detection shell (2) is fixedly connected to a pressing plate (8) via bolts, and the pressing plate (8) and the detection shell (2) are both made of metal.
3. A tight oil shale reservoir fracturing fluid damage detection device according to claim 1, characterized in that: The fracturing mechanism comprises an injection and pressure pipe (9) arranged in a perforated sleeve (7), and an injection and pressure hole (10) is opened on the circumferential surface of the injection and pressure pipe (9).
4. A tight oil shale reservoir fracturing fluid damage detection device according to claim 1, characterized in that: The lower end of the fixed base (1) is fixedly connected to a mounting frame (11), and the front end of the mounting frame (11) is fixedly connected to a recording probe (12).
5. A tight oil shale reservoir fracturing fluid damage detection device according to claim 1, characterized in that: The lower end of the fixed base (1) is fixedly connected to a support column (13), and the lower end of the support column (13) is fixedly connected to a shock-absorbing pad (14).
6. A tight oil shale reservoir fracturing fluid damage detection device according to claim 1, characterized in that: The upper end of the fixed base (1) is fixedly connected with a positioning block (15), and the detection shell (2) is located between the positioning blocks (15).