Simulation device for automatic compaction diagenesis of volcaniclastic and working method

Abstract

The invention relates to the technical field of rock simulation forming experiments, and particularly discloses a simulation device for automatic compaction diagenesis of volcaniclastic and a working method.The simulation device comprises an automatic compaction mechanism, a liquid supply mechanism and a recovery measurement mechanism, and a first compaction shell and a second compaction shell are of the same structure; compaction cavities are formed in the first compaction shell and the second compaction shell, volcanic debris is placed in the compaction cavities, the heating layers provide different temperature environments for the volcanic debris in the compaction cavities, and the bottoms of the first compaction shell and the second compaction shell are connected with the same telescopic cylinder; the liquid supply mechanism is provided with three groups of liquid storage barrels and three groups of pump bodies, the input ends of the pump bodies are connected with the corresponding liquid storage barrels through pipelines, and the output ends of the pump bodies are connected with the liquid inlet pipeline through pipelines; the recycling and measuring mechanism is provided with a metering container and an oil-water separator; according to the invention, a contrast experiment is effectively formed, objective errors of the experiment are avoided, experiment data are more accurate, compaction and liquid injection are both automatically operated, the accuracy is higher, and the experiment efficiency is higher.

Description

Technical Field

[0001] The invention relates to the technical field of rock simulation forming experiments, and in particular to a simulation device and a working method for automatic compaction and diagenesis of volcanic debris. Background Art

[0002] Pyroclastics are the main material components of pyroclastic rocks. They are debris produced by volcanic activity, also known as volcanic ejecta. They are formed by the fragmentation of lava and surrounding rocks that block the volcanic channel during volcanic eruptions. Pyroclastic compaction diagenesis refers to the process by which pyroclastic materials undergo a series of physical and chemical processes and eventually become rocks. This process involves multiple stages, including sedimentation, compaction, cementation, and recrystallization.

[0003] The simulation device of volcanic debris compaction diagenesis provides an experimental research basis for volcanic debris diagenesis. The simulation experiment requires effective control of environmental parameters such as pressure and temperature. The existing simulation experiment adopts the principle of displacement experiment, but the displacement experiment generally has only one compaction chamber for placing volcanic debris, such as patent application No. 201910432628.1 discloses a fracture-making device, a system and a process for simulating the actual rock displacement experiment process, that is, an experimental structure with a single compaction chamber is adopted, and then the external temperature parameters or pressure parameters are changed to conduct an experiment, but an effective comparison cannot be made, and two consecutive experiments cannot guarantee the consistent control of temperature or pressure, resulting in experimental errors, and the only simulated experimental liquid added is water, which cannot effectively simulate other formation structure environments.

[0004] Therefore, it is necessary to design a simulation device and working method for automatic compaction of volcanic debris to solve the problems of errors in comparison parameters of existing simulation experiments on compaction of volcanic debris and single simulated formation environment. Summary of the invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a simulation device and working method for the automatic compaction and diagenesis of volcanic debris.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a simulation device for automatic compaction and diagenesis of volcanic debris, including an automatic compaction mechanism, a liquid supply mechanism and a recovery and measurement mechanism, the automatic compaction mechanism includes a first compaction shell and a second compaction shell, the first compaction shell and the second compaction shell adopt the same structure, the first compaction shell and the second compaction shell are both provided with compaction cavities inside, volcanic debris is placed in the compaction cavity, the first compaction shell and the second compaction shell are both provided with heating layers inside, the heating layers provide different temperature environments for the volcanic debris in the compaction cavity, and the first compaction shell and the second compaction shell are connected to the same telescopic cylinder at the bottom; A pressure rod is inserted into the compaction cavity, a liquid inlet channel is provided inside the pressure rod, and the outside of the liquid inlet channel is connected to a liquid supply mechanism through an interface. The liquid supply mechanism is provided with three groups of liquid storage barrels and three groups of pump bodies. The input end of the pump body is connected to the corresponding liquid storage barrel through a pipeline, and the output end of the pump body is connected to the liquid inlet pipeline through a pipeline; A liquid outlet channel is arranged on the lower shell of the compaction chamber, and the liquid outlet channel is connected to a recovery and measurement mechanism through an interface, and the recovery and measurement mechanism is provided with a metering container and an oil-water separator.

[0007] Specifically, the bottom of the first compacting shell and the second compacting shell are installed on the same lifting plate, the bottom of the lifting plate is connected to the cylinder rod of the telescopic cylinder, the bottom of the telescopic cylinder is installed on the base, brackets are installed on both sides of the base, the upper part of the brackets is fixedly connected to the optical axis, and the upper part of the optical axis is fixedly connected to the fixing plate through a nut.

[0008] Specifically, through holes are provided on both sides of the lifting plate, and the optical axis slides through the through holes. A limit spring is sleeved on the optical axis, and the limit spring is located between the fixed plate and the lifting plate.

[0009] Specifically, two groups of pressure rod seats are installed at the bottom of the fixed plate, the bottom of the pressure rod seat is fixedly connected to the pressure rod, the liquid inlet channel runs through the pressure rod seat and the pressure rod, and the liquid inlet channel adopts an inclined transition bend inside the pressure rod seat.

[0010] Specifically, an electric heating wire is installed in the heating layer, and the electric wire connected to the electric heating wire passes through the threading channel on the first compaction shell or the second compaction shell. The wire is connected to the power box, and the power box is installed on the base. The threading channel and the liquid outlet channel both pass through the reserved holes at the bottom of the lifting plate.

[0011] Specifically, two sealing rings are installed on the upper part of the compaction chamber, and a long temperature measuring hole is provided on the outer shell of the compaction chamber. The temperature measuring hole is sealed, and three temperature sensors are installed in the temperature measuring hole from top to bottom. The communication line of the temperature sensor passes through the first compaction shell or the second compaction shell to connect to the electric control box, and the electric control box is installed on the base.

[0012] Specifically, the liquid storage barrel includes liquid storage barrel 1, liquid storage barrel 2, and liquid storage barrel 3. Liquid storage barrel 1 contains salt water, liquid storage barrel 2 contains polymer solution, and liquid storage barrel 3 contains simulated oil. The pump body includes pump body 1, pump body 2, and pump body 3. Pump body 1 is connected to liquid storage barrel 1. Pressure gauge 1 and electric control valve 1 are installed on the output pipeline of pump body 1. Electric control valve 1 controls the connection and disconnection between pump body 1 and liquid inlet pipeline. Pressure gauge 2 and electric control valve 2 are installed on the output pipeline of pump body 2. Electric control valve 2 controls the connection and disconnection between pump body 2 and liquid inlet pipeline. Pressure gauge 3 and electric control valve 3 are installed on the output pipeline of pump body 3. Electric control valve 3 controls the connection and disconnection between pump body 3 and liquid inlet pipeline.

[0013] Specifically, the liquid inlet pipeline includes liquid inlet pipeline 1 and liquid inlet pipeline 2, liquid inlet pipeline 1 is connected to the liquid inlet channel interface corresponding to the first compaction shell, liquid inlet pipeline 2 is connected to the liquid inlet channel interface corresponding to the second compaction shell, and the other ends of liquid inlet pipeline 1 and liquid inlet pipeline 2 are connected to the output pipeline of pump body 1, the output pipeline of pump body 2, and the output pipeline of pump body 3.

[0014] Specifically, the metering container includes metering container 1 and metering container 2, and the oil-water separator includes oil-water separator 1 and oil-water separator 2. The upper part of metering container 1 is connected to the liquid outlet channel interface at the lower part of the first compaction shell through a pipeline, and the bottom outlet of metering container 1 is connected to oil-water separator 1. Oil-water separator 1 separates and processes the collected liquid. The upper part of metering container 2 is connected to the liquid outlet channel interface at the lower part of the second compaction shell through a pipeline, and the bottom outlet of metering container 2 is connected to oil-water separator 2. Oil-water separator 2 separates and processes the collected liquid.

[0015] A working method of a simulation device for automatic compaction of volcanic debris, comprising the following steps: S1. Environmental settings and material preparation: temperature setting range: 20-150℃; liquid supply flow setting range: 0.1-10.0mL / min; telescopic cylinder axial pressure setting range: 0-100MPa; telescopic cylinder axial pressure pressure interval: 0.1-3.0Mpa; axial pressure holding time: 30-60min; material properties: pyroclastics; material weight: 30-35g; permeability test time: 10-15min; S2. Under the same temperature conditions, pyroclastic materials of component A of equal weight are placed in the compaction cavity of the first compaction shell and the compaction cavity of the second compaction shell respectively. The compaction cavity of the first compaction shell is filled with pyroclastic materials of particle size 0.25-0.5 mm, and the compaction cavity of the second compaction shell is filled with pyroclastic materials of particle size 0.5-1.0 mm. The telescopic cylinder controls the first compaction shell and the second compaction shell to rise simultaneously, so that the pressure rods exert the same pressure on the pyroclastic materials, pressurize at equal pressure intervals, and maintain the same compaction time; S3, open the pump body 1 and the electric control valve 1, and inject the brine in the liquid storage barrel 1 into the two compaction chambers at the same time. The injection time at each pressure point is 60 minutes, and the flow rate is 6 ml / min. The mass of the metering container is counted, and the brine flows into the metering container 1 and the metering container 2 through the liquid outlet pipe. The liquid in the metering container 1 and the metering container 2 is collected and measured, and the effective permeability of the pyroclastic material is calculated; S4, close the pump body 1 and the electric control valve 1, open the pump body 2 and the electric control valve 2, and inject the polymer solution according to the operation process of step S3, and calculate the effective permeability of the pyroclastic material; S5, close the pump body 2 and the electric control valve 2, open the pump body 3 and the electric control valve 3, simulate the oil injection process according to the operation of step S3, and calculate the effective permeability of the pyroclastic material, and conduct effective comparative analysis of the three groups of experiments; S6. Place pyroclastic materials of equal weight of component B into the compaction cavity of the first compaction shell and the compaction cavity of the second compaction shell respectively, repeat steps S2-S5 to conduct permeability comparison experiments on different types of pyroclastic materials, fit the corresponding effective permeability formula based on the axial pressure-permeability curve, and compare the effective permeabilities of the pyroclastic materials.

[0016] The present invention has the following beneficial effects: The pyroclastic automatic compaction and diagenesis simulation device and working method designed by the present invention adopts two sets of compaction experiments to be carried out simultaneously, so as to obtain experimental data while achieving the same external pressure and temperature environment, effectively forming a comparative experiment, avoiding objective experimental errors, and making the experimental data more accurate.

[0017] The simulation device and working method for automatic compaction of volcanic debris designed by the present invention adopt three different fluids to simulate the compaction experiments of volcanic debris in different geographical environments, effectively simulate other formation structure environments, and provide richer experimental data. Both compaction and liquid injection are automated, which has higher accuracy and experimental efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a simulation device for automatic compaction of volcanic debris into rocks.

[0019] Figure 2 It is a structural schematic diagram of the automatic compaction mechanism.

[0020] Figure 3 It is a cross-sectional view of the automatic compaction mechanism.

[0021] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0022] Figure 5 This is the axial pressure-permeability curve of 0.25mm-0.5mm particle size volcanic debris of component A.

[0023] Figure 6 This is the axial pressure-permeability curve of 0.25mm-0.5mm particle size volcanic debris of component B.

[0024] Figure 7 This is the axial pressure-permeability curve of pyroclastic material with a particle size of 0.5mm-1.0mm for component A.

[0025] Figure 8This is the axial pressure-permeability curve of 0.5mm-1.0mm particle size volcanic debris of component B.

[0026] Fig. 9 It is a statistical table of permeability of pyroclastic materials with different compositions / grain sizes.

[0027] In the figure: 1-automatic compacting mechanism, 11-first compacting shell, 12-second compacting shell, 13-compacting chamber, 14-pressing rod, 15-pressing rod seat, 16-liquid inlet channel, 17-heating layer, 18-electric heating wire, 19-temperature measuring hole, 110-temperature sensor, 111-liquid outlet channel, 112-fixing plate, 113-lifting plate, 114-telescopic cylinder, 115-optical axis, 116-limiting spring, 117-bracket, 118-base, 119-threading channel, 120-sealing ring; 2-liquid supply mechanism, 21-liquid storage barrel 1, 22-liquid storage barrel 2, 23-liquid storage barrel 3, 24-pump body 1, 25-pump body 2, 26-pump body 3, 27-pressure gauge 1, 28-pressure gauge 2, 29-pressure gauge 3, 210-liquid inlet pipeline 1, 211-liquid inlet pipeline 2; 3-recovery and measuring mechanism, 31-metering container 1, 32-metering container 2, 33-oil-water separator 1, 34-oil-water separator 2; 4-Electrical control box; 5-Power supply box. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely further describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] like Figure 1-Figure 4 As shown, a simulation device for automatic compaction and diagenesis of volcanic debris includes an automatic compaction mechanism 1, a liquid supply mechanism 2 and a recovery and measurement mechanism 3. The automatic compaction mechanism 1 includes a first compaction shell 11 and a second compaction shell 12. The first compaction shell 11 and the second compaction shell 12 adopt the same structure. The first compaction shell 11 and the second compaction shell 12 are both provided with a compaction cavity 13. Volcanic debris is placed in the compaction cavity 13. The first compaction shell 11 and the second compaction shell 12 are both provided with a heating layer 17. The heating layer 17 provides different temperature environments for the volcanic debris in the compaction cavity 13. The bottom of the first compaction shell 11 and the second compaction shell 12 are connected to the same telescopic cylinder 114. The telescopic cylinder 114 adopts an electric telescopic rod. The electric telescopic rod has higher precision in controlling the lifting distance. The control line of the telescopic cylinder 114 is connected to the electric control box 4.

[0030] The bottom of the first compacting shell 11 and the second compacting shell 12 are installed on the same lifting plate 113. The bottom of the lifting plate 113 is connected to the cylinder rod of the telescopic cylinder 114. The bottom of the telescopic cylinder 114 is installed on the base 118. Brackets 117 are installed on both sides of the base 118. The upper part of the bracket 117 is fixedly connected to the optical axis 115, and the upper part of the optical axis 115 is fixedly connected to the fixing plate 112 through a nut.

[0031] Through holes are provided on both sides of the lifting plate 113, and the optical axis 115 slides through the through holes. A limit spring 116 is sleeved on the optical axis 115, and the limit spring 116 is located between the fixed plate 112 and the lifting plate 113. The limit spring 116 provides a pre-tightening force between the fixed plate 112 and the lifting plate 113.

[0032] Two groups of pressure rod seats 15 are installed at the bottom of the fixed plate 112. The bottom of the pressure rod seat 15 is fixedly connected to the pressure rod 14. The liquid inlet channel 16 runs through the pressure rod seat 15 and the pressure rod 14. The liquid inlet channel 16 adopts an inclined transition bend inside the pressure rod seat 15, and the inclined transition bend reduces the pressure loss of liquid flow.

[0033] An electric heating wire 18 is installed in the heating layer 17. The electric wire connected to the electric heating wire 18 passes through the threading channel 119 on the first compaction shell 11 or the second compaction shell 12. The wire is connected to the power box 5, and the power box 5 is installed on the base 118. The threading channel 119 and the liquid outlet channel 111 both pass through the reserved holes at the bottom of the lifting plate 113.

[0034] Two sealing rings 120 are installed on the upper part of the compaction chamber 13, and a long strip of temperature measuring hole 19 is provided on the outer shell of the compaction chamber 13. The temperature measuring hole 19 is sealed, and three temperature sensors 110 are installed in the temperature measuring hole 19 from top to bottom. The communication line of the temperature sensor 110 passes through the first compaction shell 11 or the second compaction shell 12 to connect to the electric control box 4, and the electric control box 4 is installed on the base 118.

[0035] A pressure rod 14 is inserted into the compacting cavity 13, and a liquid inlet channel 16 is provided inside the pressure rod 14. The outside of the liquid inlet channel 16 is connected to the liquid supply mechanism 2 through an interface. The liquid supply mechanism 2 is provided with three groups of liquid storage barrels and three groups of pump bodies. The input end of the pump body is connected to the corresponding liquid storage barrel through a pipeline, and the output end of the pump body is connected to the liquid inlet pipeline through a pipeline.

[0036] The liquid storage barrel includes liquid storage barrel 1 21, liquid storage barrel 2 22, and liquid storage barrel 3 23. Liquid storage barrel 1 21 contains salt water, liquid storage barrel 2 22 contains polymer solution, and liquid storage barrel 3 23 contains simulated oil. The pump body includes pump body 1 24, pump body 2 25, and pump body 3 26. Pump body 1 24 is connected to liquid storage barrel 1 21. A pressure gauge 1 27 and an electric control valve 1 are installed on the output pipeline of pump body 1 24. The electric control valve 1 controls the connection and disconnection between pump body 1 24 and the liquid inlet pipeline. A pressure gauge 2 28 and an electric control valve 2 are installed on the output pipeline of pump body 2 25. The electric control valve 2 controls the connection and disconnection between pump body 2 25 and the liquid inlet pipeline. A pressure gauge 3 29 and an electric control valve 3 are installed on the output pipeline of pump body 3 26. The electric control valve 3 controls the connection and disconnection between pump body 3 26 and the liquid inlet pipeline.

[0037] The liquid inlet pipeline includes a liquid inlet pipeline 1 210 and a liquid inlet pipeline 2 211. The liquid inlet pipeline 1 210 is connected to the liquid inlet channel interface corresponding to the first compaction shell 11, and the liquid inlet pipeline 2 211 is connected to the liquid inlet channel interface corresponding to the second compaction shell 12. The other ends of the liquid inlet pipeline 1 210 and the liquid inlet pipeline 2 211 are connected to the output pipeline of the pump body 1 24, the output pipeline of the pump body 2 25, and the output pipeline of the pump body 3 26.

[0038] A liquid outlet channel 111 is provided on the lower shell of the compaction chamber 13. The liquid outlet channel 111 is vertically arranged to ensure effective outflow of liquid without siltation. The liquid outlet channel 111 is connected to the recovery and measurement mechanism 3 through an interface. The recovery and measurement mechanism 3 is provided with a metering container and an oil-water separator.

[0039] The metering container includes a metering container 1 31 and a metering container 2 32, and the oil-water separator includes an oil-water separator 1 33 and an oil-water separator 2 34. The upper part of the metering container 1 31 is connected to the liquid outlet channel interface at the lower part of the first compaction shell 11 through a pipeline, and the bottom outlet of the metering container 1 31 is connected to the oil-water separator 1 33. The oil-water separator 1 33 separates and processes the collected liquid. The upper part of the metering container 2 32 is connected to the liquid outlet channel interface at the lower part of the second compaction shell 12 through a pipeline, and the bottom outlet of the metering container 2 32 is connected to the oil-water separator 2 34. The oil-water separator 2 34 separates and processes the collected liquid.

[0040] A working method of a simulation device for automatic compaction of volcanic debris, comprising the following steps: 1. Environmental settings and material preparation: temperature setting range: 20-150℃; liquid supply flow setting range: 0.1-10.0mL / min; telescopic cylinder axial pressure setting range: 0-100MPa; telescopic cylinder axial pressure interval: 0.1-3.0Mpa; axial pressure holding time: 30-60min; material properties: pyroclastic material; material weight: 30-35g; permeability test time: 10-15min.

[0041] 2. Through the control of the electric heating wire 18 and the collection of temperature by the temperature sensor 110, under the condition of ambient temperature of 20°C, volcanic debris of component A of equal weight (30g) are placed in the compaction cavity 13 of the first compaction shell 11 and the compaction cavity 13 of the second compaction shell 12 respectively. The particle size of the volcanic debris loaded into the compaction cavity 13 of the first compaction shell 11 is 0.25-0.5mm, and the particle size of the volcanic debris loaded into the compaction cavity 13 of the second compaction shell 12 is 0.5-1.0mm. The telescopic cylinder 114 controls the first compaction shell 11 and the second compaction shell 12 to rise at the same time, so that the pressure rod 14 produces the same pressure on the volcanic debris, pressurizes at equal pressure intervals, and maintains the same compaction time.

[0042] 3. Open the pump body 24 and the electric control valve 1, and inject the brine in the liquid storage barrel 21 into the two compaction chambers 13 at the same time. The injection time at each pressure point is 60 minutes, and the flow rate is 6 ml / min. The mass of the metering container is counted, and the brine flows into the metering container 1 31 and the metering container 2 32 through the liquid outlet pipe. The liquid in the metering container 1 31 and the metering container 2 32 is collected and measured, and the effective permeability of the pyroclastic material is calculated.

[0043] 4. Close pump body 1 24 and electric control valve 1, open pump body 2 25 and electric control valve 2, follow the injection process of the polymer solution in step 3, and calculate the effective permeability of the pyroclastic material.

[0044] 5. Close pump body 25 and electric control valve 2, open pump body 3 26 and electric control valve 3, simulate the oil injection process according to the operation of step 3, and calculate the effective permeability of pyroclastic material. The three groups of experiments are effectively compared and analyzed.

[0045] 6. Place an equal weight (30 g) of pyroclastic material of component B into the compaction cavity 13 of the first compaction shell 11 and the compaction cavity 13 of the second compaction shell 12, respectively, and repeat steps S2-S5 to conduct a comparative experiment on the permeability of different types of pyroclastic material.

[0046] The corresponding effective permeability formula is fitted according to the axial pressure-permeability curve, and the effective permeability of pyroclastics is compared. The axial pressure-permeability curve of 0.25mm-0.5mm particle size pyroclastics of component A is as follows: Figure 5 As shown in the figure, the axial pressure-permeability curve of 0.5mm-1.0mm particle size pyroclastic material of component A is as follows Figure 7 As shown in the figure, the axial pressure-permeability curve of 0.25mm-0.5mm particle size pyroclastic material of component B is as follows Figure 6 As shown in the figure, the axial pressure-permeability curve of 0.5mm-1.0mm particle size pyroclastic material of component B is as follows Figure 8 The permeabilities of pyroclastic materials with different compositions and particle sizes are shown in Fig. 9shown.

[0047] The present invention is not limited to the above-mentioned implementation modes, and anyone should be aware of the structural changes made under the enlightenment of the present invention, and all those having the same or similar technical solutions as the present invention fall within the protection scope of the present invention.

[0048] The techniques, shapes, and structural parts not described in detail in the present invention are all well-known techniques.

Claims

1. A simulation device for automatic compaction of volcanic debris, characterized in that: It includes an automatic compaction mechanism, a liquid supply mechanism and a recovery and measurement mechanism. The automatic compaction mechanism includes a first compaction shell and a second compaction shell. The first compaction shell and the second compaction shell adopt the same structure. The first compaction shell and the second compaction shell are both provided with compaction cavities. Volcanic debris is placed in the compaction cavity. The first compaction shell and the second compaction shell are both provided with heating layers. The heating layers provide different temperature environments for the volcanic debris in the compaction cavity. The first compaction shell and the second compaction shell are connected to the same telescopic cylinder at the bottom. A pressure rod is inserted into the compaction cavity, a liquid inlet channel is provided inside the pressure rod, and the outside of the liquid inlet channel is connected to a liquid supply mechanism through an interface. The liquid supply mechanism is provided with three groups of liquid storage barrels and three groups of pump bodies. The input end of the pump body is connected to the corresponding liquid storage barrel through a pipeline, and the output end of the pump body is connected to the liquid inlet pipeline through a pipeline; A liquid outlet channel is arranged on the lower shell of the compaction chamber, and the liquid outlet channel is connected to a recovery and measurement mechanism through an interface, and the recovery and measurement mechanism is provided with a metering container and an oil-water separator.

2. The pyroclastic automatic compaction and diagenesis simulation device according to claim 1, characterized in that: The bottom of the first compacting shell and the second compacting shell are installed on the same lifting plate, the bottom of the lifting plate is connected to the cylinder rod of the telescopic cylinder, the bottom of the telescopic cylinder is installed on the base, and brackets are installed on both sides of the base. The upper part of the bracket is fixedly connected to the optical axis, and the upper part of the optical axis is fixedly connected to the fixing plate through a nut.

3. The pyroclastic automatic compaction and diagenesis simulation device according to claim 2, characterized in that: Through holes are arranged on both sides of the lifting plate, and the optical axis slides through the through holes. A limit spring is sleeved on the optical axis, and the limit spring is located between the fixed plate and the lifting plate.

4. The pyroclastic automatic compaction and diagenesis simulation device according to claim 2, characterized in that: Two groups of pressure rod seats are installed at the bottom of the fixed plate, the bottom of the pressure rod seat is fixedly connected to the pressure rod, the liquid inlet channel runs through the pressure rod seat and the pressure rod, and the liquid inlet channel adopts an inclined transition bend inside the pressure rod seat.

5. The pyroclastic automatic compaction and diagenesis simulation device according to claim 1, characterized in that: An electric heating wire is installed in the heating layer. The electric wire connected to the electric heating wire passes through the threading channel on the first compacted shell or the second compacted shell. The wire is connected to the power box, and the power box is installed on the base. The threading channel and the liquid outlet channel both pass through the reserved holes at the bottom of the lifting plate.

6. The pyroclastic automatic compaction and diagenesis simulation device according to claim 1, characterized in that: Two sealing rings are installed on the upper part of the compaction chamber, and a long strip of temperature measuring hole is provided on the outer shell of the compaction chamber. The temperature measuring hole is sealed, and three temperature sensors are installed in the temperature measuring hole from top to bottom. The communication line of the temperature sensor passes through the first compaction shell or the second compaction shell to connect to the electric control box, and the electric control box is installed on the base.

7. The pyroclastic automatic compaction and diagenesis simulation device according to claim 1, characterized in that: The liquid storage barrel comprises liquid storage barrel 1, liquid storage barrel 2 and liquid storage barrel 3. Liquid storage barrel 1 contains salt water, liquid storage barrel 2 contains polymer solution and liquid storage barrel 3 contains simulated oil. The pump body comprises pump body 1, pump body 2 and pump body 3. Pump body 1 is connected to liquid storage barrel 1. Pressure gauge 1 and electric control valve 1 are installed on the output pipeline of pump body 1. Electric control valve 1 controls the connection and disconnection between pump body 1 and liquid inlet pipeline. Pressure gauge 2 and electric control valve 2 are installed on the output pipeline of pump body 2. Electric control valve 2 controls the connection and disconnection between pump body 2 and liquid inlet pipeline. Pressure gauge 3 and electric control valve 3 are installed on the output pipeline of pump body 3. Electric control valve 3 controls the connection and disconnection between pump body 3 and liquid inlet pipeline.

8. The device for simulating the automatic compaction of volcanic debris according to claim 7, characterized in that: The liquid inlet pipeline includes liquid inlet pipeline 1 and liquid inlet pipeline 2. Liquid inlet pipeline 1 is connected to the liquid inlet channel interface corresponding to the first compaction shell, and liquid inlet pipeline 2 is connected to the liquid inlet channel interface corresponding to the second compaction shell. The other ends of liquid inlet pipeline 1 and liquid inlet pipeline 2 are connected to the output pipeline of pump body 1, the output pipeline of pump body 2, and the output pipeline of pump body 3.

9. The pyroclastic automatic compaction and diagenesis simulation device according to claim 1, characterized in that: The metering container includes metering container 1 and metering container 2, and the oil-water separator includes oil-water separator 1 and oil-water separator 2. The upper part of metering container 1 is connected to the liquid outlet channel interface at the lower part of the first compacting shell through a pipeline, and the bottom outlet of metering container 1 is connected to oil-water separator 1. Oil-water separator 1 collects and processes the liquid for separation. The upper part of metering container 2 is connected to the liquid outlet channel interface at the lower part of the second compacting shell through a pipeline, and the bottom outlet of metering container 2 is connected to oil-water separator 2. Oil-water separator 2 separates and processes the collected liquid.

10. The working method of the pyroclastic automatic compaction and diagenesis simulation device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Environmental settings and material preparation: temperature setting range: 20-150℃; liquid supply flow setting range: 0.1-10.0mL / min; telescopic cylinder axial pressure setting range: 0-100MPa; telescopic cylinder axial pressure pressure interval: 0.1-3.0Mpa; axial pressure holding time: 30-60min; material properties: pyroclastics; material weight: 30-35g; permeability test time: 10-15min; S2. Under the same temperature conditions, pyroclastic materials of component A of equal weight are placed in the compaction cavity of the first compaction shell and the compaction cavity of the second compaction shell respectively. The compaction cavity of the first compaction shell is filled with pyroclastic materials of particle size 0.25-0.5 mm, and the compaction cavity of the second compaction shell is filled with pyroclastic materials of particle size 0.5-1.0 mm. The telescopic cylinder controls the first compaction shell and the second compaction shell to rise simultaneously, so that the pressure rods exert the same pressure on the pyroclastic materials, pressurize at equal pressure intervals, and maintain the same compaction time; S3, open the pump body 1 and the electric control valve 1, and inject the brine in the liquid storage barrel 1 into the two compaction chambers at the same time. The injection time at each pressure point is 60 minutes, and the flow rate is 6 ml / min. The mass of the metering container is counted, and the brine flows into the metering container 1 and the metering container 2 through the liquid outlet pipe. The liquid in the metering container 1 and the metering container 2 is collected and measured, and the effective permeability of the pyroclastic material is calculated; S4, close the pump body 1 and the electric control valve 1, open the pump body 2 and the electric control valve 2, and inject the polymer solution according to the operation process of step S3, and calculate the effective permeability of the pyroclastic material; S5, close the pump body 2 and the electric control valve 2, open the pump body 3 and the electric control valve 3, simulate the oil injection process according to the operation of step S3, and calculate the effective permeability of the pyroclastic material, and conduct effective comparative analysis of the three groups of experiments; S6. Place pyroclastic materials of equal weight of component B into the compaction cavity of the first compaction shell and the compaction cavity of the second compaction shell respectively, repeat steps S2-S5 to conduct permeability comparison experiments on different types of pyroclastic materials, fit the corresponding effective permeability formula based on the axial pressure-permeability curve, and compare the effective permeabilities of the pyroclastic materials.

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