CN113417615A - Hot dry rock fracturing injection-production simulation experiment device - Google Patents
Hot dry rock fracturing injection-production simulation experiment device Download PDFInfo
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- CN113417615A CN113417615A CN202010135792.9A CN202010135792A CN113417615A CN 113417615 A CN113417615 A CN 113417615A CN 202010135792 A CN202010135792 A CN 202010135792A CN 113417615 A CN113417615 A CN 113417615A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/04—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of buildings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention provides a hot dry rock fracturing injection-production simulation experiment device which comprises an experiment box body, a rock sample for simulating hot dry rock, a pressure application assembly for applying load to the rock sample to simulate three-dimensional ground stress, a liquid injection assembly for fracturing and injecting water to the rock sample, a production assembly for extracting hot fluid after the rock sample is fractured, and a data acquisition assembly for acquiring water injection pressure, production temperature and production flow in real time, wherein the rock sample is arranged in the experiment box body, and the pressure application assembly is abutted against the side surface and the bottom surface of the rock sample; one end of the liquid injection assembly and one end of the extraction assembly are positioned in the rock sample; the data acquisition assembly is arranged on the liquid injection assembly and the extraction assembly. The invention has the advantages of real and reliable simulation, ensured safety and reliability of actual injection and production, and the like.
Description
Technical Field
The invention relates to a hot dry rock fracturing injection experimental instrument, in particular to a hot dry rock fracturing injection simulation experimental device.
Background
Geothermal resources are a new clean and renewable energy source, and the development and utilization of geothermal resources are concerned more and more worldwide. A large amount of geothermal energy is stored in dry heat rocks at deep parts of stratums, the dry heat rocks are anhydrous or low-water-content high-temperature rock masses (150-. At present, the conventional hydraulic fracturing experimental device cannot meet the simulation of hot dry rock fracturing injection-production integration, and also does not relate to the analysis of the injection-production after well group pressure, so that comprehensive and reliable verification data cannot be provided during actual production, and parameter adjustment cannot be known during actual production.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a hot dry rock fracturing injection-production simulation experiment device which is real and reliable in simulation and ensures the safety and reliability of actual injection-production.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a hot dry rock fracturing injection-production simulation experiment device comprises an experiment box body, a rock sample for simulating hot dry rock, a pressure application assembly for applying load to the rock sample to simulate three-dimensional ground stress, a liquid injection assembly for fracturing and injecting water to the rock sample, a production assembly for extracting hot fluid after the rock sample is fractured, and a data acquisition assembly for acquiring water injection pressure, production temperature and production flow in real time, wherein the rock sample is arranged in the experiment box body, and the pressure application assembly is abutted to the side face and the bottom face of the rock sample; one end of the liquid injection assembly and one end of the extraction assembly are positioned in the rock sample; the data acquisition assembly is arranged on the liquid injection assembly and the extraction assembly.
As a further improvement of the above technical solution:
still including heating the heating member of rock specimen to predetermined temperature in order to simulate high temperature environment, the heating member is located in the experimental box, and be located the bottom and/or the lateral part of rock specimen.
The pressure applying assembly comprises a bottom push plate, four groups of side push plates and push plate driving pieces, the bottom push plate and the four groups of side push plates are surrounded to form a pressure applying cavity for applying three-way load to the rock sample, and the bottom push plate and the four groups of side push plates are respectively connected with one group of push plate driving pieces.
The push plate driving piece is a hydraulic control piston, the pressing assembly further comprises a hydraulic control part for controlling the displacement of the hydraulic control piston, and each hydraulic control piston is integrally connected to the hydraulic control part through a hydraulic pipeline.
The hydraulic control part comprises a hydraulic pump, a regulating valve for regulating the pumping amount of the hydraulic pump and a pressure gauge for detecting the pumping pressure, the regulating valve is arranged between the hydraulic pump and the hydraulic control piston, and the pressure gauge is arranged between the regulating valve and the hydraulic control piston.
Annotate the liquid subassembly including the simulation injection well annotate liquid simulation tubular column, annotate the liquid pipeline and annotate liquid control part, the one end of annotating the liquid simulation tubular column is passed the experiment box is located inside the rock specimen, annotate the other end of liquid simulation tubular column through annotate the liquid pipeline with annotate liquid control part intercommunication.
The liquid injection control part comprises a high-pressure fracturing pump, a fracturing liquid injection cavity, a proppant injection cavity and a mixing cavity, and the fracturing liquid injection cavity and the proppant injection cavity are arranged in parallel and are connected with the mixing cavity; the high-pressure fracturing pump is arranged between the mixing cavity and the liquid injection simulation pipe column.
The production assembly comprises a production simulation pipe column for simulating a production well, a production pipeline, a liquid collecting cavity, a back pressure valve and a high-pressure circulating pump, one end of the production simulation pipe column penetrates through the experiment box body and is positioned inside the rock sample, the other end of the production simulation pipe column is communicated with the liquid inlet end of the liquid collecting cavity through the production pipeline, and the liquid outlet end of the liquid collecting cavity is communicated with the liquid injection pipeline through a three-way valve; the backpressure valve is arranged between the harvesting simulation pipe column and the liquid collecting cavity; the high-pressure circulating pump is arranged between the liquid collecting cavity and the three-way valve.
The data acquisition assembly comprises a first pressure detection piece for acquiring water injection pressure, a second pressure detection piece for acquiring hot fluid extraction pressure, a first temperature detection piece for acquiring water injection temperature, a second temperature detection piece for acquiring hot fluid extraction temperature and a flow detection piece for acquiring hot fluid extraction flow, wherein the first pressure detection piece and the first temperature detection piece are arranged on the liquid injection pipeline; the second pressure detection piece, the temperature detection piece and the flow detection piece are arranged on the production pipeline, and the second temperature detection piece is arranged close to the production simulation pipe column.
The experiment box body comprises a body and a box cover, the box cover is hermetically arranged at the top end of the body through a fastener, and a through hole for the liquid injection assembly and the extraction assembly to pass through is formed in the box cover.
Compared with the prior art, the invention has the advantages that:
the pressure applying assembly is abutted to the side surface and the bottom surface of the rock sample, one end of the liquid injection assembly and one end of the extraction assembly are positioned in the rock sample, and the data acquisition assembly is arranged on the liquid injection assembly and the extraction assembly. The rock sample is loaded by the pressure applying assembly to simulate three-dimensional ground stress, the rock sample is fractured and injected with water by the liquid injection assembly, hot fluid after the rock sample is fractured is extracted by the extraction assembly, and the water injection pressure, the extraction pressure, the hot fluid extraction temperature and the hot fluid extraction flow are acquired in real time by the data acquisition assembly. The method adopts the combination of the pressing assembly, the liquid injection assembly and the extraction assembly to realize the flow simulation of integration of the dry hot rock from fracturing to well pattern extraction and injection, can directly acquire water injection pressure, extraction pressure, hot fluid extraction temperature and hot fluid extraction flow for analysis after the fracture is formed by fracturing, is closer to the actual extraction condition based on the analysis of the real fracture, provides verification data for the actual extraction of the dry hot rock, ensures the smooth and reliable operation of the actual extraction process, and avoids the problems of poor extraction safety, large economic loss and the like; and verification data are provided for large-size hot dry rocks which cannot pass experimental simulation and need to be subjected to numerical simulation, so that whether the numerical simulation model is correct or not can be verified.
Meanwhile, a plurality of parameters such as crack parameters, heat exchange area, heat exchange efficiency and the like can be inverted through analysis of injection-production pressure difference, hot fluid production temperature and hot fluid production flow, and the obtained seepage rule and heat efficiency analysis are closer to the actual exploitation situation. The experimental device can be used for carrying out experiments at normal temperature, the parameters acquired in the experiments at normal temperature can be used for inverting the fracture parameters, and the influence rule of the thermal cracking effect on the fracture parameters can be analyzed through the experimental comparison at different temperatures so as to guide parameter adjustment in the actual exploitation process.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 is a front view of the hot dry rock fracturing injection-production simulation experiment device.
FIG. 2 is a top view of the hot dry rock fracturing injection-production simulation experiment device.
The reference numerals in the figures denote:
1. an experiment box body; 11. a body; 12. a box cover; 2. sampling rock; 3. a pressure applying assembly; 31. a bottom push plate; 32. a side push plate; 33. a hydraulic control piston; 34. a hydraulic control unit; 341. a hydraulic pump; 342. adjusting a valve; 343. a pressure gauge; 35. a hydraulic line; 4. a liquid injection assembly; 41. injecting a liquid simulation pipe column; 42. a liquid injection line; 43. a liquid injection control part; 431. a high pressure fracturing pump; 432. injecting fracturing fluid into the cavity; 433. a proppant injection chamber; 434. a mixing chamber; 5. a production assembly; 51. collecting a simulation pipe column; 52. a production line; 53. a liquid collection cavity; 54. a high pressure circulation pump; 55. a back pressure valve; 56. a three-way valve; 6. a data acquisition component; 61. a first pressure detecting member; 62. a second pressure detecting member; 63. a first temperature detection member; 64. a second temperature detection member; 65. a flow rate detecting member; 7. a heating member.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples, without thereby limiting the scope of the invention.
As shown in fig. 1 and fig. 2, the hot dry rock fracturing, injecting and extracting simulation experiment device of the embodiment includes an experiment box 1, a rock sample 2, a pressure applying assembly 3, a liquid injecting assembly 4, an extracting assembly 5 and a data collecting assembly 6. Wherein, the rock sample 2 is arranged in the experiment box body 1 to simulate the hot dry rock; the pressing assembly 3 is abutted to the side surface and the bottom surface of the rock sample 2 so as to apply load to the rock sample 2 and simulate three-dimensional ground stress; one end of the liquid injection assembly 4 is positioned in the rock sample 2 so as to perform hydraulic fracturing and water injection on the rock sample 2; one end of the extraction assembly 5 is positioned inside the rock sample 2 to extract hot fluid after fracturing of the rock sample 2; the data acquisition assembly 6 is arranged on the liquid injection assembly 4 and the extraction assembly 5 to acquire water injection pressure, extraction pressure, hot fluid extraction temperature and hot fluid extraction flow in real time. The simulation experiment device is simple in structure and compact in layout.
According to the invention, the combination of the pressure applying assembly 3, the liquid injection assembly 4 and the extraction assembly 5 is adopted to realize the integrated flow simulation of the hot dry rock from fracturing to well pattern extraction and injection, and the water injection pressure, the extraction pressure, the hot fluid extraction temperature and the hot fluid extraction flow can be directly acquired for analysis after the fracture is formed by fracturing, so that the analysis based on the real fracture is closer to the actual extraction condition, and verification data is provided for the actual extraction of the hot dry rock; and verification data are provided for large-size hot dry rocks which cannot pass experimental simulation and need to be subjected to numerical simulation, so that whether the numerical simulation model is correct or not can be verified.
Meanwhile, a plurality of parameters such as crack parameters, heat exchange area, heat exchange efficiency and the like can be inverted through analysis of injection-production pressure difference, hot fluid production temperature and hot fluid flow, and the obtained seepage rule and heat efficiency analysis are closer to the actual production condition. The experimental device can be used for carrying out experiments at normal temperature, the parameters acquired in the experiments at normal temperature can be used for inverting the fracture parameters, and the influence rule of the thermal cracking effect on the fracture parameters can be analyzed through the experimental comparison at different temperatures so as to guide parameter adjustment in the actual exploitation process.
Further, as shown in fig. 1, the hot dry rock fracturing injection-production simulation experiment device further comprises a heating element 7. The heating member 7 is arranged in the experiment box body 1 and is placed at the bottom of the rock sample 2 so as to heat the rock sample 2 to a preset temperature. The invention realizes the simulation of the high-pressure and high-temperature environment of the hot dry rock by the combination of the pressing component 3 and the heating element 7.
In this embodiment, the heating member 7 is an electric heating plate, and the preset temperature of the heating member 7 is set between 150 ℃ and 650 ℃. In other embodiments, the arrangement position and the form of the heating element 7 for effectively heating the rock sample 2 are within the scope of the present invention, such as placing the heating element 7 on the side of the rock sample 2, or providing the heating element 7 on the side and the bottom of the rock sample 2.
In this embodiment, the heating member 7 is provided with a temperature detection part to detect whether the heating temperature of the heating member 7 reaches a preset temperature. Further, set up the thermometer in the experiment box 1, whether the temperature of temperature detection rock specimen 2 reaches the settlement temperature to whether control heating member 7 continues to heat.
Further, the pressing assembly 3 includes a bottom push plate 31, four sets of side push plates 32, and a push plate driving member. The bottom push plate 31 is attached to the bottom surface of the rock sample 2, the four groups of side push plates 32 are attached to the four side surfaces of the rock sample 2, and the bottom push plate 31 and the four groups of side push plates 32 are enclosed to form a pressure applying cavity for applying three-way load to the rock sample 2, so that the rock sample 2 is uniformly and reliably stressed, and the simulation of the high-pressure environment of the dry-hot rock is ensured. Meanwhile, the bottom push plate 31 and the four groups of side push plates 32 are respectively connected to one group of push plate driving members to provide force to the bottom push plate 31 and the side push plates 32.
In this embodiment, the push plate driving member is a hydraulic control piston 33; in other embodiments, the push plate driving member can be mechanically driven, etc. As shown in fig. 1 and 2, each group of push plate driving members includes two hydraulic-controlled pistons 33, and the driving ends of the two hydraulic-controlled pistons 33 are symmetrically arranged at two ends of the bottom push plate 31 or the side push plate 32, which ensures that the bottom push plate 31 or the side push plate 32 uniformly presses the rock sample 2. In other embodiments, the number of the hydraulic control pistons 33 of each group of push plate driving members can be adjusted according to the size of the push plate, as long as the bottom push plate 31 and the side push plate 32 are uniformly stressed, for example, the number of the hydraulic control pistons 33 of each group of push plate driving members can be set to be one, three, or four.
Meanwhile, the pressing assembly 3 further includes a hydraulic control part 34. Each hydraulic control piston 33 is integrally connected to the hydraulic control part 34 through a hydraulic pipeline 35, and the hydraulic control part 34 simultaneously controls each hydraulic control piston 33 to act, so that the displacement of the bottom push plate 31 and each side push plate 32 are the same, and the effective simulation of the three-way ground stress of the hot dry rock is ensured.
Further, the hydraulic control part 34 includes a hydraulic pump 341, a regulator valve 342, and a pressure gauge 343. The regulating valve 342 is disposed between the hydraulic pump 341 and the hydraulic control piston 33 to regulate the pumping amount of the hydraulic pump 341 and further control the hydraulic control piston 33 to operate to simulate different stress states. The pressure gauge 343 is disposed between the regulating valve 342 and the hydraulic control piston 33 to detect whether the pumping pressure reaches a predetermined pressure.
In this embodiment, the injection assembly 4 includes an injection simulation column 41, an injection line 42, and an injection control component 43. Wherein the injection simulation string 41 simulates an injection well; one end of the liquid injection simulation column 41 penetrates through the experiment box body 1 and is positioned inside the rock sample 2, and the other end of the liquid injection simulation column 41 is communicated with a liquid injection control component 43 through a liquid injection pipeline 42. During the simulation experiment, can carry out the fracturing to rock specimen 2 through annotating liquid simulation tubular column 41 pump income fluid, after the crack produces, during the pressure release, can adjust little pump pressure and flow through annotating liquid control part 43 to follow-up exploitation carries out.
Further, the injection control part 43 includes a high-pressure fracturing pump 431, a fracturing fluid injection chamber 432, a proppant injection chamber 433, and a mixing chamber 434. The fracturing fluid injection cavity 432 and the proppant injection cavity 433 are arranged in parallel, the fracturing fluid injection cavity 432 and the proppant injection cavity 433 are connected with the mixing cavity 434, and the high-pressure fracturing pump 431 is arranged between the mixing cavity 434 and the injection simulation pipe column 41. In a simulation experiment, the fracturing fluid and the proppant enter the mixing cavity 434, are mixed and then are pumped into the rock sample 2 through the high-pressure fracturing pump 431 to simulate the fracturing of the hot dry rock.
In this embodiment, the production assembly 5 includes a production simulation string 51, a production line 52, a liquid collection chamber 53, a backpressure valve 55, and a high pressure circulation pump 54. Wherein the recovery simulation string 51 simulates a production well; one end of the recovery simulation pipe column 51 penetrates through the experiment box body 1 and is positioned inside the rock sample 2, and the other end of the recovery simulation pipe column 51 is communicated with the liquid inlet end of the liquid collection cavity 53 through a recovery pipeline 52; the liquid outlet end of the liquid collection cavity 53 is communicated with the liquid injection pipeline 42 through a three-way valve 56; the backpressure valve 55 is arranged between the recovery simulation pipe column 51 and the liquid collecting cavity 53 and is used for maintaining the high-pressure state of the recovery pipeline 52; the high pressure circulating pump 54 is provided between the liquid collecting chamber 53 and the three-way valve 56 to provide the power for the liquid feeding. The thermal fluid after the rock sample 2 is fractured is collected to the liquid collecting cavity 53 through the recovery simulation pipe column 51 and the recovery pipeline 52, meanwhile, the liquid in the liquid collecting cavity 53 is pumped into the liquid injection pipeline 42 through the action of the high-pressure circulating pump 54 to achieve the purpose of recycling the recovery liquid, and the device is low in cost and high in environmental friendliness.
In this embodiment, the production and injection well pattern simulated by the simulation experiment device is one-injection four-production. The liquid injection simulation pipe column 41 is arranged in the middle of the rock sample 2; the four groups of the collecting simulation columns 51 are arranged at four corners of the rock sample 2. In other embodiments, the simulation experiment apparatus may also simulate one-injection one-production, one-injection two-production, and two-injection one-production, and the setting positions of the injection simulation column 41 and the recovery simulation column 51 may also be adjusted according to actual requirements.
In this embodiment, the injection simulation string 41 and the recovery simulation string 51 are vertically disposed. In other embodiments, injection simulation string 41 and recovery simulation string 51 may also be positioned at an incline.
Further, the data collecting assembly 6 includes a first pressure detecting member 61, a second pressure detecting member 62, a first temperature detecting member 63, a second temperature detecting member 64, and a flow rate detecting member 65. Wherein, the first pressure detecting part 61 is arranged on the liquid injection pipeline 42 to collect the water injection pressure; the first temperature detection piece 63 is arranged on the liquid injection pipeline 42 to collect the water injection temperature; the second temperature detection piece 64 is arranged at one end of the production pipeline 52 close to the recovery simulation pipe column 51 to collect the production temperature of the hot fluid; a second pressure sensing member 62 is provided on the production line 52 to sense production pressure; a flow sensing member 65 is provided on the production line 52 to sense the flow of the hot fluid. According to the invention, the injection-production pressure difference can be obtained through the water injection pressure and the production pressure, and a plurality of parameters such as crack parameters, heat exchange area, heat exchange efficiency and the like can be inverted through the analysis of the injection-production pressure difference, the production temperature of the hot fluid and the flow of the hot fluid. As shown in fig. 1, the experimental box 1 includes a body 11 and a cover 12. The case cover 12 is hermetically mounted on the top end of the body 11 through a fastener, and the case cover 12 is provided with a through hole for the liquid injection assembly 4 and the extraction assembly 5 to pass through.
In this embodiment, the application method of the hot dry rock fracturing injection-production simulation experiment device is as follows: placing the rock sample 2 into the pressure assembly, attaching the bottom push plate 31 and the side push plate 32 to the rock sample 2, drilling the liquid injection simulation pipe column 41 and the recovery simulation pipe column 51 into the rock sample 2, and closing the box cover 12 to seal the rock sample 2; applying confining pressure to simulate three-dimensional ground stress through the bottom push plate 31 and the side push plate 32, and starting the heating element 7 to heat the rock sample 2 to a preset temperature; pumping fluid into the rock sample 2 through the injection simulation pipe column 41 for fracturing, relieving pressure after a crack is generated, reducing the pump pressure and the flow at the moment, and extracting the hot fluid after the rock sample 2 is fractured through the recovery simulation pipe column 51; collecting water injection pressure, production pressure, hot fluid flow and hot fluid temperature; the collected data are made into a pressure curve of a fracturing well, a flow velocity-temperature curve of a water recovery well and the like so as to analyze the thermal efficiency, and further parameters such as the thermal contact area of the production and injection well pattern can be analyzed. Meanwhile, the experimental device can be used for carrying out experiments at normal temperature without heating the rock sample 2, parameters such as the sampling and injection pressure difference, the discharge capacity and the temperature collected in the normal-temperature experiment can be used for inverting crack parameters, and the influence rule of the thermal cracking effect on the crack parameters can be analyzed through experiment comparison at different temperatures.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A hot dry rock fracturing injection-production simulation experiment device is characterized by comprising an experiment box body, a rock sample for simulating hot dry rock, a pressure application assembly for applying load to the rock sample to simulate three-dimensional ground stress, a liquid injection assembly for fracturing and injecting water to the rock sample, a production assembly for extracting hot fluid after the rock sample is fractured, and a data acquisition assembly for acquiring water injection pressure, production temperature and production flow in real time, wherein the rock sample is arranged in the experiment box body, and the pressure application assembly is abutted to the side surface and the bottom surface of the rock sample; one end of the liquid injection assembly and one end of the extraction assembly are positioned in the rock sample; the data acquisition assembly is arranged on the liquid injection assembly and the extraction assembly.
2. The hot dry rock fracturing injection-production simulation experiment device as claimed in claim 1, further comprising a heating element for heating the rock sample to a preset temperature to simulate a high-temperature environment, wherein the heating element is arranged in the experiment box and is positioned at the bottom and/or the side of the rock sample.
3. The hot dry rock fracturing injection-production simulation experiment device of claim 1, wherein the pressure applying assembly comprises a bottom push plate, four groups of side push plates and a push plate driving member, the bottom push plate and the four groups of side push plates are surrounded to form a pressure applying cavity for applying a three-way load to the rock sample, and the bottom push plate and the four groups of side push plates are respectively connected with one group of push plate driving member.
4. The hot dry rock fracturing, injecting and producing simulation experiment device as claimed in claim 3, wherein the push plate driving member is a hydraulic control piston, the pressing assembly further comprises a hydraulic control part for controlling the displacement of the hydraulic control piston, and each hydraulic control piston is integrally connected to the hydraulic control part through a hydraulic pipeline.
5. The dry hot rock fracturing injection-production simulation experiment device as claimed in claim 4, wherein the hydraulic control component comprises a hydraulic pump, a regulating valve for regulating the pumping amount of the hydraulic pump, and a pressure gauge for detecting the pumping pressure, the regulating valve is arranged between the hydraulic pump and the hydraulic control piston, and the pressure gauge is arranged between the regulating valve and the hydraulic control piston.
6. The hot dry rock fracturing, injecting and extracting simulation experiment device as claimed in any one of claims 1 to 5, wherein the injection assembly comprises an injection simulation pipe column for simulating an injection well, an injection pipeline and an injection control component, one end of the injection simulation pipe column penetrates through the experiment box body and is located inside the rock sample, and the other end of the injection simulation pipe column is communicated with the injection control component through the injection pipeline.
7. The hot dry rock fracturing injection-production simulation experiment device of claim 6, wherein the injection control component comprises a high-pressure fracturing pump, a fracturing fluid injection cavity, a proppant injection cavity and a mixing cavity, and the fracturing fluid injection cavity and the proppant injection cavity are arranged in parallel and are connected with the mixing cavity; the high-pressure fracturing pump is arranged between the mixing cavity and the liquid injection simulation pipe column.
8. The dry hot rock fracturing injection-production simulation experiment device of claim 6, wherein the production assembly comprises a production simulation pipe column for simulating a production well, a production pipeline, a liquid collection chamber, a back pressure valve and a high-pressure circulating pump, one end of the production simulation pipe column penetrates through the experiment box body and is positioned inside the rock sample, the other end of the production simulation pipe column is communicated with a liquid inlet end of the liquid collection chamber through the production pipeline, and a liquid outlet end of the liquid collection chamber is communicated with the liquid injection pipeline through a three-way valve; the backpressure valve is arranged between the harvesting simulation pipe column and the liquid collecting cavity; the high-pressure circulating pump is arranged between the liquid collecting cavity and the three-way valve.
9. The dry hot rock fracturing, injecting and extracting simulation experiment device as claimed in claim 8, wherein the data acquisition assembly comprises a first pressure detection piece for acquiring water injection pressure, a second pressure detection piece for acquiring hot fluid extraction pressure, a first temperature detection piece for acquiring water injection temperature, a second temperature detection piece for acquiring hot fluid extraction temperature, and a flow detection piece for acquiring hot fluid extraction flow, wherein the first pressure detection piece and the first temperature detection piece are arranged on the liquid injection pipeline; the second pressure detection piece, the temperature detection piece and the flow detection piece are arranged on the production pipeline, and the second temperature detection piece is arranged close to the production simulation pipe column.
10. The hot dry rock fracturing, injecting and extracting simulation experiment device as claimed in any one of claims 1 to 5, wherein the experiment box body comprises a body and a box cover, the box cover is hermetically mounted at the top end of the body through a fastener, and a through hole for the liquid injection assembly and the extraction assembly to pass through is formed in the box cover.
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| CN202010135792.9A CN113417615B (en) | 2020-03-02 | 2020-03-02 | Dry-hot rock fracturing injection and production simulation experiment device |
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| CN202010135792.9A CN113417615B (en) | 2020-03-02 | 2020-03-02 | Dry-hot rock fracturing injection and production simulation experiment device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114893177A (en) * | 2022-06-21 | 2022-08-12 | 中国矿业大学 | Water injection fracturing shear test system for simulating geothermal system dry hot rock |
| CN114994118A (en) * | 2022-08-03 | 2022-09-02 | 中国煤炭地质总局勘查研究总院 | Experimental device for be used for studying geology geothermal energy utilization |
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| CN114893177B (en) * | 2022-06-21 | 2023-09-26 | 中国矿业大学 | Water injection fracturing shear test system for simulating geothermal system dry-hot rock |
| CN114994118A (en) * | 2022-08-03 | 2022-09-02 | 中国煤炭地质总局勘查研究总院 | Experimental device for be used for studying geology geothermal energy utilization |
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