CN112763402A - Deep karst erosion simulation experiment device - Google Patents
Deep karst erosion simulation experiment device Download PDFInfo
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- CN112763402A CN112763402A CN202110056500.7A CN202110056500A CN112763402A CN 112763402 A CN112763402 A CN 112763402A CN 202110056500 A CN202110056500 A CN 202110056500A CN 112763402 A CN112763402 A CN 112763402A
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Abstract
The invention discloses a deep karst corrosion simulation experiment device which comprises a reaction device, a corrosion solution supply device and a high-pressure carbon dioxide supply device, wherein the reaction device comprises a reaction box, a reaction kettle, a temperature control device, a reaction pressure acquisition device and a target pressure setting device, a corrosion experiment is carried out in the reaction kettle in the reaction device, the corrosion solution supply device provides required corrosion solution for the reaction kettle, and the high-pressure carbon dioxide supply device provides carbon dioxide with corresponding pressure for the reaction kettle. The device provided by the invention has a simple structure, and can meet the experimental requirements of simulating carbonate rock corrosion mechanism under different temperatures, different pressures, different water chemistry characteristics and open and closed environments.
Description
Technical Field
The invention relates to a carbonate rock corrosion simulation experiment device, in particular to a deep karst corrosion simulation experiment device.
Background
The marine carbonate karst reservoir is a world-level problem, the reserves of the global carbonate oil and gas reservoirs account for about 50% of the total amount of oil and gas resources, and the yield accounts for more than 60%. The carbonate rock stratums of the middle and lower Ordovician systems in China are the main layers of the paleo-karst development and the sea facies fracture-cavity type oil and gas reservoir distribution.
The compaction, cementation and recrystallization after deposition result in a few primary pores in the old carbonate rock, and the secondary pores generated by erosion are important reservoir spaces. The carbonate reservoir undergoes a multi-stage and multi-type long ancient karst action process, has karst action in the surface and near-surface environments in the geological historical period, and undergoes superposition and transformation of a burial process and deep karst action. At present, the carbonate rock corrosion mainly occurs in the surface environment, the near-surface environment or the buried environment, and the main factors influencing the carbonate rock corrosion still have questions. Therefore, the research on the carbonate rock corrosion mechanism has important theoretical significance and can provide a basis for the prediction of the karst reservoir.
From the 70 s in the 20 th century, researchers at home and abroad began to research the carbonate rock corrosion mechanism by taking a corrosion simulation experiment as a means. Early focused on the research on the erosion rate of different types of carbonate rocks, the experimental sample mainly comprises a rock block, and fluid is in direct contact with the surface of the rock. In recent years, researchers at home and abroad begin to research the erosion characteristics of acid fluid under the condition of internal seepage of rocks and analyze the influence of temperature, pressure, mineral components, reservoir space types and the like on the erosion action. For example, the patent publication No. CN109884281A discloses a test device for on-line monitoring of carbonate rock corrosion, which includes a corrosion solution supply device, a test piece corrosion device, a data acquisition device, and an electric control cabinet, wherein the electric control cabinet controls the power supply of each component in the test device that needs to supply power, and the corrosion solution generated by the corrosion solution supply device is sent to the test piece corrosion device to simulate the corrosion action of carbonate rock in a sealed environment at different flow rates and different temperatures, and to simulate the corrosion action of carbonate rock in an open environment at different flow rates and different temperatures. However, the device disclosed by the invention can only realize the corrosion experiment in a normal-pressure environment and cannot simulate the corrosion mechanism of the deep buried environment condition of the carbonate karst reservoir.
Disclosure of Invention
The invention aims to solve the technical problem of providing a deep karst erosion simulation experiment device for simulating the erosion mechanism of a carbonate karst reservoir under the condition of a deep buried environment, which meets the experiment requirements of simulating the erosion mechanism of the carbonate rock under different temperatures, different pressures, different water chemical characteristics and open and closed environments.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a deep karst erosion simulation experiment device, includes reaction unit, erosion liquid supply unit and high-pressure carbon dioxide supply unit, wherein:
the reaction device comprises a reaction box, a reaction kettle, a temperature control device, a reaction pressure acquisition device and a target pressure setting device, wherein,
the reaction box comprises a box body, the box body is provided with a reaction chamber which can be sealed, and the reaction kettle is arranged in the reaction chamber;
a sample frame for placing corrosion test pieces is arranged in the reaction kettle, and an air inlet/liquid port, a sampling port and an overflow port are respectively arranged on the reaction kettle, wherein the sampling port is connected with a sampling tube, and the sampling tube is provided with a sampling valve; an overflow pipe is connected to the overflow outlet, and a back pressure valve is arranged on the overflow pipe;
the temperature control device comprises a heater, a heating switch, a temperature sensor, a solid-state relay and a secondary instrument for displaying temperature, wherein the heater is electrically connected with the heating switch, the temperature sensor is connected with the secondary instrument for displaying temperature, and the solid-state relay is arranged between the heater and the secondary instrument for displaying temperature; the heater and the temperature sensor are arranged in a reaction chamber of the reaction box;
the reaction pressure acquisition device comprises a pressure sensor and a secondary instrument which is connected with the pressure sensor and used for displaying reaction pressure, and the pressure sensor is arranged in the reaction kettle;
the target pressure setting device comprises a hand pump and a pressure gauge, and an outlet of the hand pump is communicated with a control port pipeline of the back pressure valve;
the corrosion solution supply device comprises a advection pump and a piston container, wherein the inlet of the piston container is communicated with the outlet pipeline of the advection pump, the outlet of the piston container is communicated with the gas/liquid inlet pipeline of the reaction kettle, and a liquid inlet valve is arranged on the communicating pipeline;
the high-pressure carbon dioxide supply device comprises a carbon dioxide generating device, a gas pressurizing system and a power device for providing power for the gas pressurizing system, wherein an inlet of the gas pressurizing system is communicated with an outlet pipeline of the carbon dioxide generating device, an outlet of the gas pressurizing system is communicated with a gas/liquid inlet pipeline of the reaction kettle, and an air inlet valve is arranged on the communicating pipeline.
In the technical scheme of the invention, the gas/liquid inlet is usually arranged at the bottom of the reaction kettle, the sampling port is usually arranged at the middle part of the reaction kettle, and the overflow port is usually arranged at the top of the reaction kettle.
In the technical scheme of the invention, the number of the piston containers related to the corrosion solution supply device can be one or more than two, and when the number of the piston containers is more than two, the piston containers are mutually connected in parallel.
In the technical scheme of the invention, the carbon dioxide generating device related to the high-pressure carbon dioxide supply device can be a device capable of generating carbon dioxide gas in the prior art, and is preferably a carbon dioxide gas cylinder. The power plant involved in powering the gas booster system is the same as the prior art, preferably an air compressor.
Preferably, the reaction chamber further comprises a foot rest for supporting the chamber body.
For convenience of operation, the deep karst erosion simulation experiment device preferably further comprises an experiment table, and the reaction device and the erosion liquid supply device are arranged on the experiment table.
Compared with the prior art, the device of the invention is characterized in that:
1. the corrosion experiment is carried out in sealed environment's reation kettle, and reation kettle places in the reaction box, heats through electric heater, and reation kettle temperature is unanimous with the reaction box temperature.
2. Will be provided withPressurized high purity CO2The gas is continuously filled into the reaction kettle, so that the pressure in the reaction kettle can be kept constant, and the gas can be ensured to be along with the H in the carbonate rock and the water solution+Reaction of (2), CO2Continuously dissolving to provide constant acidic environment, so as to dissolve and corrode the test piece, the weakly acidic aqueous solution and CO2The gas remains in equilibrium.
3. The structure that the constant flow pump, the piston container and the reaction kettle are connected is designed, and the current reaction pressure in the reaction kettle is larger than or smaller than the target pressure by controlling the flow speed and the pressure of the constant flow pump, so that two hydrodynamic conditions of a continuous flow open environment and a closed environment are realized.
4. The method can simulate the corrosion action mechanism of the carbonate reservoir in the underground actual water chemistry environment of the sedimentary basin oil and gas field by regulating the water chemistry characteristics of the aqueous solution, and has important significance for reservoir prediction and exploration and development.
5. The device provided by the invention has a simple structure, and can meet the experimental requirements of simulating carbonate rock corrosion mechanism under different temperatures, different pressures, different water chemistry characteristics and open and closed environments.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the deep karst erosion simulation experiment apparatus according to the present invention.
The reference numbers in the figures are:
the device comprises a foot stand 1, a advection pump 2, a reaction kettle 3, a sample frame 4, screws 5, an overflow outlet 6, a reaction chamber 7, a box 8, a heater 9, a secondary instrument 10 for displaying temperature, a secondary instrument 11 for displaying reaction pressure, a liquid inlet valve 12, a pressure gauge 13, a heating switch 14, an air inlet valve 15, a sampling valve 16, a back pressure valve 17, a hand pump 18, a piston container 19, a gas pressure regulating valve 20, a pressure-increasing pressure gauge 21, a laboratory bench 22, a gas pressure-increasing system 23, an air compressor 24 and a carbon dioxide gas cylinder 25.
Detailed Description
The invention will be better understood from the following detailed description taken in conjunction with the accompanying drawings.
As shown in fig. 1, the deep karst erosion simulation experiment apparatus according to the present invention includes a reaction apparatus, an erosion liquid supply apparatus and a high-pressure carbon dioxide supply apparatus, wherein an erosion experiment is performed in the reaction apparatus, the erosion liquid supply apparatus supplies an erosion liquid meeting experimental requirements to the reaction apparatus, and the high-pressure carbon dioxide supply apparatus supplies a high-pressure carbon dioxide gas meeting pressure conditions to the reaction apparatus.
The reaction device comprises a reaction box, a reaction kettle 3, a temperature control device, a reaction pressure acquisition device and a target pressure setting device, wherein,
the reaction box comprises a box body 8 and a foot rest 1 for supporting the box body 8, the box body 8 is provided with a reaction chamber 7 which can be sealed, and the reaction kettle 3 is arranged in the reaction chamber 7;
a sample frame 4 for placing an erosion test piece is arranged in the reaction kettle 3, and an air inlet/liquid port, a sampling port and an overflow port 6 are respectively arranged on the reaction kettle 3, wherein the sampling port is connected with a sampling tube, and the sampling tube is provided with a sampling valve 16; an overflow pipe is connected to the overflow outlet 6, a back pressure valve 17 is arranged on the overflow pipe, and the overflow pipe is connected to the inlet of the back pressure valve 17 at the moment; in the embodiment of fig. 1, the reaction kettle 3 is composed of a kettle body and a kettle cover, the kettle body and the kettle cover are connected through screws 5 (or bolt pairs), the gas/liquid inlet and the sampling port are respectively arranged at the bottom and the middle part of the kettle body, and the overflow outlet 6 is arranged at the top of the kettle cover;
the temperature control device comprises a heater 9, a heating switch 14, a temperature sensor, a solid state relay and a secondary instrument 10 for displaying temperature, wherein the heater 9 is electrically connected with the heating switch 14, the temperature sensor is connected with the secondary instrument 10 for displaying temperature, and the solid state relay is arranged between the heater 9 and the secondary instrument 10 for displaying temperature; the heater 9 and the temperature sensor are arranged in a reaction chamber 7 of the reaction box, when an experiment is carried out, the heating switch 14 is firstly started, the heater 9 starts to work, the temperature in the reaction chamber 7 is fed back to the secondary instrument 10 for displaying the temperature through the temperature sensor, when the temperature in the reaction chamber 7 reaches the preset temperature, the solid relay sends a signal to stop the heater 9, after a period of time, when the temperature in the reaction chamber 7 is lower than the preset temperature, the solid relay sends a signal again to start the heater 9 for heating, so that the heat preservation of the reaction chamber 7, namely the reaction kettle 3 is realized;
the reaction pressure acquisition device comprises a pressure sensor and a secondary instrument 11 connected with the pressure sensor and used for displaying reaction pressure, the pressure sensor is arranged in the reaction kettle 3, and therefore the current reaction pressure in the reaction kettle 3 can be clearly known through the secondary instrument 11 used for displaying the reaction pressure;
the target pressure setting device comprises a hand pump 18 and a pressure gauge 13, an outlet of the hand pump 18 is communicated with a control port pipeline of a back pressure valve 17, and an inlet of the hand pump 18 is arranged below the liquid level in a container for containing purified water; the pressure gauge 13 is arranged at the outlet end of the hand pump 18, and the pressure gauge 13 displays the pressure in the hand pump 18, wherein the pressure is the target pressure. The setting of the target pressure directly determines whether the simulation experiment is carried out under an open condition or a sealed condition, specifically, when the current reaction pressure in the reaction kettle 3 is less than or equal to the target pressure, the back pressure valve 17 is not opened, and the simulation experiment is carried out under a closed condition; and when the current reaction pressure in the reaction kettle 3 is greater than the target pressure, the back pressure valve 17 is opened, the corrosion solution in the reaction kettle 3 is continuously cut off from the outlet of the back pressure valve 17 through the overflow outlet 6 via the overflow pipe, and the pressure is released to make the reaction pressure in the reaction kettle 3 constant at the target pressure value, so that the open reaction environment of continuous flow is realized.
The corrosion solution supply device comprises a constant-flow pump 2 and a piston container 19, wherein an inlet of the piston container 19 is communicated with an outlet pipeline of the constant-flow pump 2, an outlet of the piston container 19 is communicated with an air inlet/liquid outlet pipeline of the reaction kettle 3, and a liquid inlet valve 12 is arranged on the communicating pipeline. The inlet of the constant-flow pump 2 is arranged below the liquid level in a container for containing the purified water, the purified water pressurized by the constant-flow pump 2 is sent into the piston container 19 to pressurize the erosion liquid in the piston container 19 by setting the flow rate and the pressure of the constant-flow pump 2, and then the purified water is injected into the reaction kettle 3 at a specified flow rate. The simulation experiment is finally realized by combining the setting of the flow speed and the pressure of the constant flow pump 2 and the determination of the target pressure so as to meet two hydrodynamic conditions of a continuous flow open environment and a closed environment. The number of the piston containers 19 may be one or more than two, and when the number is more than two, they are connected in parallel with each other. In the embodiment of fig. 1, the number of piston reservoirs 19 is 1.
The high-pressure carbon dioxide supply device comprises a carbon dioxide generating device, a gas pressurizing system 23 for pressurizing carbon dioxide gas generated by the carbon dioxide generating device and a power device for providing power for the gas pressurizing system 23, wherein the inlet of the gas pressurizing system 23 is communicated with the outlet pipeline of the carbon dioxide generating device, the outlet of the gas pressurizing system is communicated with the gas/liquid inlet pipeline of the reaction kettle 3, and the communicating pipeline is provided with an air inlet valve 15. The pressure of the carbon dioxide to be fed into the reaction kettle 3 is set according to the experimental requirements, and specifically, the pressure-increasing pressure gauge 21 on the gas pressurization system 23 is adjusted to a set pressure value through a gas regulating valve on the gas pressurization system 23, wherein the pressure value represents the pressure of the carbon dioxide to be fed into the reaction kettle 3. The carbon dioxide generating device may be a device capable of generating carbon dioxide gas as in the prior art, and the power device for powering the gas pressurizing system 23 is the same as in the prior art, and in the embodiment shown in fig. 1, is a carbon dioxide gas cylinder 25 filled with carbon dioxide, and the power device is an air compressor 24.
Further, the deep karst erosion simulation experiment device of the present invention preferably further includes an experiment table 22, and the reaction device and the erosion liquid supply device are disposed on the experiment table 22, so as to facilitate operation of an operator.
In order to make the experimental apparatus of the present invention more compact in structure, smaller in occupied space and convenient for the observation and operation of the operator, in the embodiment shown in fig. 1, the advection pump 2 in the corrosion liquid supply apparatus and the hand pump 18 in the target pressure setting apparatus are directly placed or installed on the box body 8 of the reaction box, the heating switch 14 in the temperature control apparatus, the secondary meter 10 for displaying temperature, the secondary meter 11 for displaying reaction pressure in the reaction pressure acquisition apparatus and the pressure gauge 13 in the target pressure setting apparatus are all installed on the wall surface of the box body 8 of the reaction box, the liquid inlet valve 12, the air inlet valve 15, the back pressure valve 17 and the sampling valve 16 are also directly installed on the wall surface of the box body 8 of the reaction box, and the solid relay in the temperature control apparatus is installed inside the box body 8 of the reaction box.
When a simulation experiment is carried out, firstly, a processed corrosion test piece is fixed on a sample frame 4 through aramid fiber or other silk threads, a kettle cover of a reaction kettle 3 is opened, a sample fixed with the corrosion test piece is placed in the reaction kettle 3, corrosion liquid with certain water chemistry characteristics, which is prepared in advance according to the underground water chemistry characteristics of a sedimentary basin oil-gas field, is poured into the reaction kettle 3, a screw 5 for connecting a kettle body and the kettle cover is screwed by a wrench, then the reaction kettle 3 is placed in a reaction chamber 7 of a reaction box, and a box door is tightly closed. Different target pressure values are set by the hand pump 18. The temperature in the reaction chamber 7 (the temperature of the reaction kettle 3) is set in advance, the heating switch 14 is started, the interior of the reaction chamber 7 is heated through the heater 9, and the solid-state relay controls the start and stop of the heater 9 to realize a constant-temperature reaction environment; and different high-temperature reaction environments can be realized through setting different reaction temperatures. The air compressor 24 is opened to provide power for the gas pressurization system 23, the carbon dioxide in the gas pressurization system 23 is sent to the carbon dioxide gas cylinder 25 for pressurization, the gas pressure regulating valve 20 on the gas pressurization system 23 is used for regulating the pressurization pressure gauge 21 to a set pressure value, when the carbon dioxide in the gas pressurization system 23 reaches the set pressure, the gas inlet valve 15 is opened to inject the carbon dioxide gas into the reaction kettle 3, and the back pressure valve 17 can ensure that the reaction pressure in the reaction kettle 3 does not exceed a target pressure value; opening the constant-flow pump 2, setting the flow rate and the pressure of the constant-flow pump 2, injecting the etching solution into the reaction kettle 3 at a set flow rate through the piston container 19, and adjusting the flow rate and the pressure of the constant-flow pump 2 to be combined with the setting of a target pressure value to realize an open or closed hydrodynamic environment. Reaction solutions of different reaction times were taken out through the sampling valve 16 for analysis.
The device provided by the invention can further simulate the carbonate reservoir corrosion mechanism research under different water chemistry characteristics, different temperatures, different pressures and different hydrodynamic conditions according to a drawn up experimental scheme.
The following will be described in more detail by using the apparatus shown in fig. 1 to perform experiments on erosion test pieces prepared by using samples of geothermal wells in the new male district and field outcrop cross sections collected by the applicant in specific work.
1. Experimental sample
The experimental samples are collected from DO3 well, D16 well, Ji county field outcrop section, foggy mountain group and higher than village group of Lange mountain field outcrop section in the New Xiongan district, 20 carbonate rock samples are ground into 50 corrosion test pieces. Specification of corrosion test piece: the diameter is 3cm, the thickness is 0.3cm, and each test piece is punched with two holes.
2. Experimental protocol
Carrying out an erosion experiment of 18 groups of temperature and pressure points within the range of 40 ℃, 10-150 ℃ and 30MPa, and simulating the erosion action under the environment of near-surface, shallow burial and deep burial. The corrosion solution used in the experiment is full-section formation water of a downhole foggy mountain group collected from a DO3 well in a New area of Xiongan, and is filtered by medical sponge for use in the corrosion experiment. The simulation experiment time of each group of temperature and pressure points is 24 hours, and the specific experiment scheme is shown in table 1.
TABLE 1 high-temp. high-pressure corrosion experimental protocol
3. Experimental procedure
Surface area measurement
The diameter and the height of each erosion test piece at different positions and the diameter of the small hole in the erosion test piece are respectively measured by a vernier caliper, and the average value is obtained, so as to calculate the surface area of the erosion test piece.
Calculating the formula:
wherein S is the surface area of the corrosion test piece, R1For the diameter of the erosion coupon, R2The diameter of the small hole and h is the height of the corrosion test piece.
② weighing
And cleaning the corrosion test piece by using ultrapure water, and drying the corrosion test piece for 2 hours in a constant-temperature drying oven at the set temperature of 105 ℃. After drying, the samples were cooled in a drying dish and each of the corrosion coupons was weighed using an analytical balance.
(iii) Structure Observation
Respectively taking a picture of each corrosion test piece by using a camera; observing the microscopic characteristics of each corrosion test piece by using a polarizing microscope, wherein the microscopic characteristics comprise components, structures, pores, crack development conditions and the like;
simulation experiment of corrosion
The high-temperature high-pressure corrosion experiment is carried out in a reaction kettle 3, firstly, a corrosion test piece is fixed on a sample frame 4 by an aramid fiber wire, then the sample frame is placed in the reaction kettle 3, corrosion solution is added, a kettle body and a kettle cover of the reaction kettle 3 are connected by a screw 5 and then placed in a reaction chamber 7, the communication condition of each pipeline is checked, the experiment is carried out after the communication condition is checked, the reaction pressure and the temperature are respectively adjusted to the pressure and the temperature required by the experiment, and the temperature and the pressure condition are kept for 24 hours.
Calculation of corrosion rate
After the reaction is finished, the heating switch 14 is closed, the pressure in the reaction kettle 3 is released, after the temperature is reduced to the room temperature and the pressure is completely released, the reaction kettle 3 is disconnected from each interface, and the sample holder 4 is taken out. And repeating the first step, the second step and the third step, recording the surface area, the weight, the surface appearance and the microscopic characteristics of the corrosion test piece after the experiment, and calculating the corrosion rate of the unit area of the corrosion test piece.
Calculating the formula: v ═ m1-m2)/(S·t)
Wherein v is the erosion rate, m1M is the weight of the test specimen before the corrosion test2The weight of the corrosion test piece after the test, S is the surface area of the corrosion test piece, and t is the test time.
4. Results of the experiment
Calculating corrosion rate
When the fluid and pressure conditions are the same, the corrosion rate of the sample in the formation water is generally in a descending trend along with the increase of the temperature, and has the characteristics of rapid descending-slow increasing-rapid descending, and the corrosion rate is obviously increased within the range of 100 ℃ to 140 ℃.
When the fluid and temperature conditions are the same, the erosion rate of the sample in the formation water increases significantly with increasing pressure.
Under experimental conditions, the corrosion rate of the dolomitic sample is obviously lower than that of the limestone sample.
Surface topography and microstructure variation characteristics
The corrosion phenomenon of each sample occurs to a certain degree under the experimental conditions, and the surface corrosion of the corrosion test piece sample is taken as the main point. The method mainly represents a sample with underdeveloped pores and cracks, soluble fluid is difficult to enter the sample to generate large-scale corrosion in the experimental process, and the soluble fluid is only corroded on the surface of the sample, so that the surface of the sample becomes fuzzy and exceeds the identification precision of an optical microscope; the samples developed in the pores and cracks are corroded and expanded along inter-granular and inter-crystalline pores and various cracks and finally communicated to a certain degree.
Claims (6)
1. A deep karst erosion simulation experiment device comprises a reaction device, an erosion liquid supply device and a high-pressure carbon dioxide supply device, and is characterized in that,
the reaction device comprises a reaction box, a reaction kettle (3), a temperature control device, a reaction pressure acquisition device and a target pressure setting device, wherein,
the reaction box comprises a box body (8), the box body (8) is provided with a reaction chamber (7) which can be sealed, and the reaction kettle (3) is arranged in the reaction chamber (7);
a sample frame (4) for placing a corrosion test piece is arranged in the reaction kettle (3), an air inlet/liquid port, a sampling port and an overflow port (6) are respectively arranged on the reaction kettle (3), wherein the sampling port is connected with a sampling tube, and the sampling tube is provided with a sampling valve (16); an overflow outlet (6) is connected with an overflow pipe, and a back pressure valve (17) is arranged on the overflow pipe;
the temperature control device comprises a heater (9), a heating switch (14), a temperature sensor, a solid-state relay and a secondary instrument (10) for displaying temperature, wherein the heater (9) is electrically connected with the heating switch (14), the temperature sensor is connected with the secondary instrument (10) for displaying temperature, and the solid-state relay is arranged between the heater (9) and the secondary instrument (10) for displaying temperature; the heater (9) and the temperature sensor are arranged in a reaction chamber (7) of the reaction box;
the reaction pressure acquisition device comprises a pressure sensor and a secondary instrument (11) connected with the pressure sensor and used for displaying reaction pressure, and the pressure sensor is arranged in the reaction kettle (3);
the target pressure setting device comprises a hand pump (18) and a pressure gauge (13), an outlet of the hand pump (18) is communicated with a control port pipeline of the back pressure valve (17), and the pressure gauge (13) is arranged at an outlet end of the hand pump (18);
the corrosion solution supply device comprises a constant-flow pump (2) and a piston container (19), wherein an inlet of the piston container (19) is communicated with an outlet pipeline of the constant-flow pump (2), an outlet of the piston container is communicated with an air inlet/liquid outlet pipeline of the reaction kettle (3), and a liquid inlet valve (12) is arranged on the communicating pipeline;
the high-pressure carbon dioxide supply device comprises a carbon dioxide generating device, a gas pressurizing system (23) and a power device for providing power for the gas pressurizing system (23), wherein an inlet of the gas pressurizing system (23) is communicated with an outlet pipeline of the carbon dioxide generating device, an outlet of the gas pressurizing system is communicated with a gas/liquid inlet pipeline of the reaction kettle (3), and an air inlet valve (15) is arranged on the communicating pipeline.
2. The deep karst erosion simulation experiment device of claim 1, wherein the gas/liquid inlet is arranged at the bottom of the reaction kettle (3), the sampling port is arranged at the middle part of the reaction kettle (3), and the overflow port (6) is arranged at the top of the reaction kettle (3).
3. The deep karst erosion simulation experiment device of claim 1, wherein the carbon dioxide generation device is a carbon dioxide gas cylinder (25).
4. The deep karst erosion simulation experiment device of claim 1, wherein the power device is an air compressor (24).
5. The deep karst erosion simulation experiment device according to any one of claims 1 to 4, wherein the reaction box further comprises a foot rest (1) for supporting the box body (8).
6. The deep karst erosion simulation experiment device according to any one of claims 1 to 4, further comprising an experiment table (22), wherein the reaction device and the erosion liquid supply device are disposed on the experiment table (22).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114088920A (en) * | 2021-11-23 | 2022-02-25 | 贵州大学 | Rock soil material positive and negative pressure undermining test device |
| CN115450607A (en) * | 2022-09-16 | 2022-12-09 | 西南石油大学 | Three-dimensional physical simulation experiment device and method for complex fracture-cavity type oil reservoir |
-
2021
- 2021-01-15 CN CN202110056500.7A patent/CN112763402A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114088920A (en) * | 2021-11-23 | 2022-02-25 | 贵州大学 | Rock soil material positive and negative pressure undermining test device |
| CN115450607A (en) * | 2022-09-16 | 2022-12-09 | 西南石油大学 | Three-dimensional physical simulation experiment device and method for complex fracture-cavity type oil reservoir |
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