Reservoir pore evolution simulation experiment device and experiment method thereof

Abstract

The invention relates to the technical field of reservoir porosity evolution, and discloses a reservoir porosity evolution simulation experiment device and an experiment method thereof.The reservoir porosity evolution simulation experiment device comprises a box body and a rock block, a movable plate is movably connected to the box body, a closing plate is movably connected to the box body, a lifting mechanism is arranged on the box body, a rotating motor is fixed to the lifting mechanism, and the rock block is fixed to the rotating motor. A drill bit is fixed to an output shaft of the rotating motor, a solution box is fixed to the right side of the box body, a mixing mechanism is arranged on the right side of the solution box, and a pump body is fixed to the top of the solution box. According to the reservoir pore evolution simulation experiment device and the experiment method thereof, the reaction contact surface is increased and the experiment efficiency is improved through the reaction in the holes of the solution and the rock, meanwhile, the pressure of the rock can be adjusted through the hole depth, and the contrast parameters of the experiment can be improved by adjusting the temperature of the solution, so that the experiment efficiency is improved. Therefore, the experimental accuracy is improved, the overall use is convenient and fast, and the use effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of reservoir pore evolution, in particular to a reservoir pore evolution simulation experimental device and an experimental method thereof. Background Art

[0002] Reservoir pores refer to the volume of space in rocks that is not filled by solid matter, including pores between rock particles, pores inside particles, rock cracks, and various other holes and seams. Reservoir porosity is a parameter that measures the volume of pores contained in oil and gas reservoir rocks. It is usually expressed as a ratio expressed as a percentage or decimal. Depending on the type of pores it refers to, it can be divided into total porosity and effective porosity. Simulating reservoir pores is an important means to understand reservoir porosity.

[0003] For example, a Chinese patent (publication number: CN103196807B) discloses a method for analyzing the diagenesis process and pore evolution of sandstone, which includes the following steps: detecting reservoir rock component parameters, reservoir diagenetic fluid characteristic parameters, regional characteristic parameters and burial mode in the simulated area; according to the detection results of the steps, mixing sandy mixed samples, mud samples and diagenetic fluids for simulation; placing the samples mixed in the steps in a reservoir diagenesis simulation device; conducting a simulation experiment; and performing reservoir microscopic characteristic analysis on the obtained simulated diagenetic samples, wherein the analysis includes: rock thin section identification, rock sample scanning electron microscope analysis, quantitative analysis of the total amount of clay minerals and common non-clay minerals in sedimentary rocks by X-ray diffraction, and evaluating the reservoir diagenetic evolution process based on the analysis results.

[0004] This invention analyzes the reservoir microscopic characteristics of the samples in the simulation experiment, thereby realizing the analysis and evaluation of the reservoir diagenetic evolution process. However, when conducting the simulation experiment, this invention needs to be specifically adjusted according to the local parameters, which makes the simulation experiment inconvenient. Therefore, a reservoir pore evolution simulation experiment device and its experimental method are proposed to solve the above-mentioned problems. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the present invention provides a reservoir pore evolution simulation experimental device and an experimental method thereof, which have the advantages of convenient simulation experiments and solve the problem of inconvenience in simulation experiments.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a reservoir pore evolution simulation experimental device, comprising a box and a rock block, characterized in that a movable plate is movably connected to the inner cavity wall at the bottom of the box, a closed plate is movably connected to the left side of the box, the left side of the movable plate penetrates the closed plate, the rock block is placed on the top surface of the movable plate, a lifting mechanism extending to the inner side of the box is provided on the top of the box, a rotating motor located in the inner cavity of the box is fixed on the lifting mechanism, a drill bit is fixed on the output shaft of the rotating motor, a solution box is fixed on the right side of the box, a mixing mechanism penetrating into the inner cavity of the solution box is provided on the right side of the solution box, a pump body is fixed on the top of the solution box, a feed inlet and a feed outlet of the pump body are both fixedly connected to a liquid passing pipe, the liquid passing pipe at the bottom extends to the inner cavity of the solution box, and the liquid passing pipe at the top extends to the inner cavity of the shell;

[0009] The lifting mechanism includes a servo motor fixed to the top of the box body, a driving gear fixed to the output shaft of the servo motor, a driven gear meshed with the bottom of the driving gear, a rotating rod movably connected to the box body is fixed at the axis of the driven gear, a movable sleeve movably connected to the box body is threadedly connected to the outer side of the rotating rod, the back side of the movable sleeve extends to the rear side wall of the inner cavity of the box body and is slidably connected to the rear side wall of the inner cavity of the box body, and the front side of the movable sleeve is fixed to the rotating motor.

[0010] Preferably, a bearing located on the back of the rock block is fixed to the bottom wall of the inner cavity of the box, and the rotating rod is rotatably connected to the box via the bearing.

[0011] Preferably, a limiting block is fixed on the back of the movable sleeve, a limiting channel is provided on the inner cavity wall on the back of the box body, and the limiting block is slidably connected to the box body through the limiting channel.

[0012] Preferably, a threaded line is fixed on the outer side of the rotating rod, and the inner side of the movable sleeve is threadedly connected to the rotating rod through the threaded line.

[0013] Preferably, the left side of the box is provided with two front-to-back symmetrical plug-in interfaces, the right side of the closing plate is fixed with a plug-in block adapted to the plug-in interfaces, the plug-in block is plugged into the box through the plug-in interfaces, and the left side of the closing plate is provided with a movable opening extending through to the right side thereof, and the movable opening is adapted to the movable plate.

[0014] Preferably, the mixing mechanism includes a driving motor fixed to the right side of the solution tank, the output shaft of the driving motor is fixed with a rotating rod extending to the inner cavity of the solution tank, a disc is fixed to the left side of the rotating rod, a movable rod is hinged to the left side of the disc, a stirring block is fixed to the bottom of the movable rod, and a limiting part movably connected to the movable rod is provided on the inner cavity wall on the right side of the solution tank.

[0015] Preferably, the disk is eccentrically arranged with respect to the rotating rod, the left side of the disk is rotatably connected with an adjusting column, the left side of the adjusting column is fixed with the movable rod, and the adjusting column and the disk are eccentrically arranged.

[0016] Preferably, the limiting member comprises a fixing plate fixed to the right side wall of the inner cavity of the solution tank, a sliding block is movably connected to the left side of the fixing plate, a positioning block is fixed to the left side of the sliding block, and the positioning block is movably connected to the movable rod.

[0017] Preferably, a movable channel is opened on the left side of the fixed plate, the sliding block is slidably connected to the fixed plate through the movable channel, the top of the locking block is opened with a connecting opening extending through to the bottom thereof, and the movable rod is slidably connected to the locking block through the connecting opening.

[0018] A test method of a reservoir pore evolution simulation experimental device, applied to the reservoir pore evolution simulation experimental device described above, comprises the following steps:

[0019] 1) Collect reservoir rock samples from the study area, cut them into appropriate sizes, and then perform CT scanning on the rock samples to obtain the three-dimensional spatial distribution characteristics of their internal pore structure, and then place the rock blocks on the movable plate;

[0020] 2) Determine the experimental depth of the rock block, then start the lifting mechanism and the rotating motor to lower the rock block and turn the hole;

[0021] 3) Determine the experimental temperature and reaction type of the experiment, prepare the solution required for the reaction, fill the solution into the solution tank, and ensure that the solution in the solution tank is fully mixed through the mixing effect of the mixing mechanism;

[0022] 4) Start the pump to introduce the solution into the liquid pipe, and then flow into the borehole cavity of the rock block to achieve simulated evolution of the rock block;

[0023] 5) Through the experimental reaction of different solution amounts in different hole depths, the rock can be adjusted to different experimental pressures, and by adjusting the solution temperature, the evolution of the rock at different ambient temperatures can be achieved;

[0024] 6) Change different pressures and temperatures, measure the permeability data of the rock blocks in real time, slice the rock blocks and perform CT scanning, and finally obtain experimental data. Based on the results, analyze the evolution process and main controlling factors of the reservoir pores.

[0025] (III) Beneficial effects

[0026] Compared with the prior art, the present invention provides a reservoir pore evolution simulation experimental device and an experimental method thereof, which have the following beneficial effects:

[0027] The reservoir pore evolution simulation experimental device and the experimental method thereof drive the drill bit to descend through the lifting mechanism, so as to realize the fixed-depth drilling of the rock by the drill bit. The stirring and mixing of the stirring block in the solution box is realized through the setting of the mixing mechanism, which is beneficial to the sufficient mixing of the solution. The reaction between the solution and the pores of the rock block increases the reaction contact surface and improves the experimental efficiency. At the same time, the pressure of the rock block can be adjusted by the hole depth, and the temperature of the solution can be adjusted, which is beneficial to improve the control parameters of the experiment, thereby facilitating the improvement of the experimental accuracy. The overall use is convenient and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the connection structure between the box body and the closing plate of the present invention;

[0030] Figure 3 It is a schematic diagram of the lifting mechanism structure of the present invention;

[0031] Figure 4 It is a schematic diagram of the structure of the mixing mechanism of the present invention;

[0032] Figure 5 It is a three-dimensional diagram of the limiter structure of the present invention.

[0033] In the figure: 1 box body, 2 movable plate, 3 closing plate, 4 rock block, 5 lifting mechanism, 501 servo motor, 502 driving gear, 503 driven gear, 504 rotating rod, 505 movable sleeve, 6 rotating motor, 7 drill bit, 8 solution box, 9 mixing mechanism, 901 driving motor, 902 rotating rod, 903 disc, 904 movable rod, 905 stirring block, 906 limiting piece, 9061 fixed plate, 9062 sliding block, 9063 positioning block, 10 pump body, 11 liquid pipe. DETAILED DESCRIPTION

[0034] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figures 1 to 2 A reservoir pore evolution simulation experimental device in this embodiment includes a box 1 and a rock block 4. A movable plate 2 is movably connected to the inner cavity wall at the bottom of the box 1, and a closed plate 3 is movably connected to the left side of the box 1. The left side of the movable plate 2 penetrates the closed plate 3. The rock block 4 is placed on the top surface of the movable plate 2. Two front-to-back symmetrical plug interfaces are opened on the left side of the box 1.

[0036] The provision of the plug interface facilitates the plugging of the plug-in block with the box 1 through the plug interface, thereby achieving the closure of the entire box 1, facilitating the placement of the rock block 4, and thus facilitating the improvement of the convenience of use of the entire experimental device.

[0037] It can be understood that a plug-in block adapted to the plug-in interface is fixed on the right side of the closing plate 3, and the plug-in block is plugged into the box body 1 through the plug-in interface. A movable opening is opened on the left side of the closing plate 3 and extends to its right side, and the movable opening is adapted to the movable plate 2.

[0038] The provision of the movable opening is conducive to the extension of the movable board 2, thereby facilitating the stability of the placement of the movable board 2, and is also conducive to adjusting the position of the rock block 4 through the movable board 2, thereby facilitating the improvement of the overall convenience of use.

[0039] It can also be understood that the rock block 4 fits against the top of the movable plate 2, and a lifting mechanism 5 extending to the inside of the box 1 is provided on the top of the box 1, a rotating motor 6 located in the inner cavity of the box 1 is fixed on the lifting mechanism 5, and a drill bit 7 is fixed on the output shaft of the rotating motor 6.

[0040] The lifting mechanism 5 is lifted and lowered to drive the drill bit 7 to lift and lower, and the motor 6 is used to drive the drill bit 7 to rotate, thereby achieving drilling of the rock block 4, which is beneficial to the implementation of the experimental method and to the improvement of the overall stability of use.

[0041] It can be seen that a solution tank 8 is fixed on the right side of the box body 1, and a mixing mechanism 9 is provided on the right side of the solution tank 8 which penetrates into its inner cavity. A pump body 10 is fixed on the top of the solution tank 8, and the feed inlet and the discharge port of the pump body 10 are fixedly connected with a liquid passing pipe 11. The bottom liquid passing pipe 11 extends to the inner cavity of the solution tank 8, and the top liquid passing pipe 11 extends to the inner cavity of the outer shell 1.

[0042] In this embodiment, the mixing mechanism 9 is provided to facilitate full mixing of the solution in the solution tank 8, thereby facilitating the stability of the experiment and improving the stability of the overall experimental device.

[0043] See also Figure 3 In order to realize the drilling function, the lifting mechanism 5 includes a servo motor 501 fixed to the top of the box body 1, the output shaft of the servo motor 501 is fixed with a driving gear 502, the bottom of the driving gear 502 is meshed with a driven gear 503, and a rotating rod 504 movably connected to the box body 1 is fixed at the axis of the driven gear 503, and a bearing located on the back of the rock block 4 is fixed to the bottom wall of the inner cavity of the box body 1.

[0044] The bearing setting is conducive to the rotation of the rotating rod 504, thereby facilitating the improvement of the stability of the overall mechanism. The meshing setting is conducive to the transmission of the rotational force of the servo motor 501, thereby facilitating the transmission of the overall mechanism and improving the stability of use.

[0045] It can also be seen that the rotating rod 504 is rotatably connected to the box body 1 through a bearing, the outer side of the rotating rod 504 is threadedly connected with a movable sleeve 505 movably connected to the box body 1, the back side of the movable sleeve 505 extends to the rear side wall of the inner cavity of the box body 1 and is slidably connected to the rear side wall of the inner cavity of the box body 1, the outer side of the rotating rod 504 is fixed with a threaded line, the inner side of the movable sleeve 505 is threadedly connected to the rotating rod 504 through a threaded line, a limiting block is fixed on the back side of the movable sleeve 505, a limiting channel is opened on the inner cavity wall of the back side of the box body 1, the limiting block is slidably connected to the box body 1 through the limiting channel, and the front side of the movable sleeve 505 is fixed to the rotating motor 6.

[0046] In this embodiment, the setting of the thread line is conducive to the lifting and lowering of the movable sleeve 505 through the rotation of the rotating rod 504 and the limiting action of the limiting block, thereby facilitating the lifting and lowering of the drill bit 7 and the realization of the drilling function. The setting of the limiting channel is conducive to the sliding of the limiting block, thereby facilitating the stable operation of the overall mechanism and the stable use of the overall device.

[0047] See also Figures 4 to 5 In order to improve the experimental stability, the mixing mechanism 9 in this embodiment includes a driving motor 901 fixed to the right side of the solution tank 8, the output shaft of the driving motor 901 is fixed with a rotating rod 902 extending to the inner cavity of the solution tank 8, a disc 903 is fixed to the left side of the rotating rod 902, a movable rod 904 is hinged to the left side of the disc 903, and the disc 903 and the rotating rod 902 are eccentrically arranged.

[0048] The eccentric setting is conducive to driving the adjustment column to adjust the horizontal displacement when the disc 903 rotates, thereby facilitating the forward and backward swing function of the stirring block 905, thereby facilitating the mixing and stirring of the solution and improving the experimental stability.

[0049] The left side of the disc 903 is rotatably connected to an adjusting column, the left side of the adjusting column is fixed to a movable rod 904, the adjusting column and the disc 903 are eccentrically arranged, a stirring block 905 is fixed to the bottom of the movable rod 904, and a limiting member 906 movably connected to the movable rod 904 is provided on the inner cavity wall on the right side of the solution box 8.

[0050] In addition, by adjusting the rotating connection setting of the column, it is beneficial to the vertical state of the movable rod 904, thereby facilitating the lifting effect of the stirring block 905. By setting the limiting member 906, it is beneficial to limit the movable rod 904, thereby facilitating the improvement of the stirring stability of the stirring block 905.

[0051] The limiting member 906 includes a fixing plate 9061 fixed to the right side wall of the inner cavity of the solution box 8 , a sliding block 9062 is movably connected to the left side of the fixing plate 9061 , and a moving channel is opened on the left side of the fixing plate 9061 .

[0052] The setting of the moving channel is conducive to the sliding of the sliding block 9062, thereby facilitating the improvement of the stability of the limiting member 906, and further facilitating the improvement of the stability of the device.

[0053] Moreover, the sliding block 9062 is slidably connected to the fixed plate 9061 through a movable channel, a connecting port is provided on the top of the locking block 9063 extending through the bottom thereof, the movable rod 904 is slidably connected to the locking block 9063 through the connecting port, a locking block 9063 is fixed on the left side of the sliding block 9062, and the locking block 9063 is movably connected to the movable rod 904.

[0054] The setting of the connecting port is conducive to limiting the movable rod 904, thereby facilitating the stable displacement of the movable rod 904. By lifting the stirring block 905 up and down during the forward and backward displacement, the solution in the solution box 8 is stirred, which is conducive to improving the degree of solution mixing, thereby facilitating improving the accuracy of the experimental stability box.

[0055] In addition, a reservoir pore evolution simulation experimental method is proposed, which is applied to the above-mentioned reservoir pore evolution simulation experimental device, and includes the following steps:

[0056] 1) Collect reservoir rock samples in the study area, cut them into appropriate sizes, and then perform CT scanning on the rock samples to obtain the three-dimensional spatial distribution characteristics of their internal pore structure, and then place the rock blocks 4 on the movable plate 2;

[0057] 2) Determine the experimental depth of the rock block 4, and then start the lifting mechanism 5 and the rotating motor 6 to lower the rock block 4 and turn the hole;

[0058] 3) Determine the experimental temperature and reaction type of the experiment, prepare the solution required for the reaction, fill the solution into the solution tank 8, and ensure that the solution in the solution tank 8 is fully mixed through the mixing effect of the mixing mechanism 9;

[0059] 4) Start the pump 10 to introduce the solution into the liquid pipe 11, and then flow into the borehole cavity of the rock block 4 to achieve the simulated evolution of the rock block 4;

[0060] 5) By means of the experimental reaction of different solution amounts in different hole depths, the rock block 4 is adjusted to different experimental pressures, and by adjusting the solution temperature, the rock block 4 is evolved at different ambient temperatures;

[0061] 6) Changing different pressures and temperatures, and measuring the permeability data of the rock block 4 in real time, slicing the rock block 4 and performing CT scanning, finally obtaining experimental data, and analyzing the evolution process and main controlling factors of the reservoir pores based on the results.

[0062] The electrical components appearing in the text are all electrically connected to the controller and the power supply. The control method of the present invention is controlled by the controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power supply is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0063] The working principle of the above embodiment is:

[0064] The rock block 4 is placed on the movable plate 2, and the movable plate 2 is slid into the box body 1 by sliding action, and then the plug-in block of the closing plate 3 is plugged and closed with the box body 1, and then the servo motor 501 is started, and the driven gear 503 is rotated by meshing action, thereby driving the rotating rod 504 to rotate, and the movable sleeve 505 is lowered by the sliding connection between the movable sleeve 505 and the box body 1, and then the rotating motor 6 is started to drive the drill bit 7 to rotate, so as to accurately drill the rock block 4, and the solution is added into the solution box 8, and the driving motor 901 is started to drive the rotating rod 9 02 rotation, through the eccentric setting, the front and rear swinging of the adjusting column is realized, and the lifting and stirring of the stirring block 905 in the front and rear directions is realized through the sliding connection of the locking block 9063 and the sliding connection between the movable rod 904 and the locking block 9063, thereby improving the mixing adequacy of the solution in the solution box 8, and the liquid in the solution box 8 is discharged through the pump body 10, and then transmitted into the hole of the rock block 4, so as to realize the reaction to the rock block 4, thereby realizing the simulated evolution experiment, which is conducive to improving the overall convenience of use. The overall experimental device is easy to use, which is conducive to the stable and rapid progress of the experiment.

[0065] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0066] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A reservoir pore evolution simulation experimental device, comprising a box (1) and a rock block (4), characterized in that: A movable plate (2) is movably connected to the inner cavity wall at the bottom of the box (1), a closed plate (3) is movably connected to the left side of the box (1), the left side of the movable plate (2) penetrates the closed plate (3), the rock block (4) is placed on the top surface of the movable plate (2), a lifting mechanism (5) extending to the inside of the box (1) is provided on the top of the box (1), a rotating motor (6) located in the inner cavity of the box (1) is fixed to the lifting mechanism (5), and the rotating motor (6) The output shaft of the pump (1) is fixed with a drill bit (7), the right side of the box body (1) is fixed with a solution box (8), the right side of the solution box (8) is provided with a mixing mechanism (9) penetrating into the inner cavity thereof, the top of the solution box (8) is fixed with a pump body (10), the feed inlet and the discharge outlet of the pump body (10) are both fixedly connected with a liquid passing pipe (11), the bottom of the liquid passing pipe (11) extends to the inner cavity of the solution box (8), and the top of the liquid passing pipe (11) extends to the inner cavity of the housing (1); The lifting mechanism (5) comprises a servo motor (501) fixed to the top of the box body (1); a driving gear (502) is fixed to the output shaft of the servo motor (501); a driven gear (503) is meshed at the bottom of the driving gear (502); a rotating rod (504) movably connected to the box body (1) is fixed at the axis of the driven gear (503); a movable sleeve (505) movably connected to the box body (1) is threadedly connected to the outer side of the rotating rod (504); the back side of the movable sleeve (505) extends to the rear side wall of the inner cavity of the box body (1) and is slidably connected to the rear side wall of the inner cavity of the box body (1); and the front side of the movable sleeve (505) is fixed to the rotating motor (6).

2. The reservoir pore evolution simulation experimental device according to claim 1, characterized in that: A bearing located on the back of the rock block (4) is fixed to the bottom wall of the inner cavity of the box body (1), and the rotating rod (504) is rotatably connected to the box body (1) via the bearing.

3. The reservoir pore evolution simulation experimental device according to claim 1, characterized in that: A limiting block is fixed on the back of the movable sleeve (505), a limiting channel is provided on the inner cavity wall on the back of the box body (1), and the limiting block is slidably connected to the box body (1) via the limiting channel.

4. The reservoir pore evolution simulation experimental device according to claim 1, characterized in that: The outer side of the rotating rod (504) is fixed with a threaded line, and the inner side of the movable sleeve (505) is threadedly connected to the rotating rod (504) through the threaded line.

5. The reservoir pore evolution simulation experimental device according to claim 1, characterized in that: The left side of the box body (1) is provided with two plug-in ports that are symmetrical in front and back, and a plug-in block that matches the plug-in ports is fixed on the right side of the closing plate (3), and the plug-in block is plugged into the box body (1) via the plug-in ports. The left side of the closing plate (3) is provided with a movable opening that extends through to the right side thereof, and the movable opening matches the movable plate (2).

6. The reservoir pore evolution simulation experimental device according to claim 1, characterized in that: The mixing mechanism (9) comprises a driving motor (901) fixed to the right side of the solution tank (8); a rotating rod (902) extending into the inner cavity of the solution tank (8) is fixed to the output shaft of the driving motor (901); a disc (903) is fixed to the left side of the rotating rod (902); a movable rod (904) is hinged to the left side of the disc (903); a stirring block (905) is fixed to the bottom of the movable rod (904); and a limiting member (906) movably connected to the movable rod (904) is provided on the inner cavity wall on the right side of the solution tank (8).

7. The reservoir pore evolution simulation experimental device according to claim 6, characterized in that: The disk (903) and the rotating rod (902) are eccentrically arranged. The left side of the disk (903) is rotatably connected with an adjustment column. The left side of the adjustment column is fixed to the movable rod (904). The adjustment column and the disk (903) are eccentrically arranged.

8. The reservoir pore evolution simulation experimental device according to claim 6, characterized in that: The limiting member (906) comprises a fixing plate (9061) fixed to the right side wall of the inner cavity of the solution tank (8); a sliding block (9062) is movably connected to the left side of the fixing plate (9061); a locking block (9063) is fixed to the left side of the sliding block (9062); and the locking block (9063) is movably connected to the movable rod (904).

9. The reservoir pore evolution simulation experimental device according to claim 8, characterized in that: A movable channel is provided on the left side of the fixed plate (9061), and the sliding block (9062) is slidably connected to the fixed plate (9061) via the movable channel. A connecting opening is provided on the top of the locking block (9063) and extends to the bottom thereof, and the movable rod (904) is slidably connected to the locking block (9063) via the connecting opening.

10. A test method for a reservoir pore evolution simulation experimental device, applied to the reservoir pore evolution simulation experimental device described in any one of claims 1 to 9 above, characterized in that: The following steps are involved: 1) Collect reservoir rock samples in the study area, cut them into appropriate sizes, and then perform CT scanning on the rock samples to obtain the three-dimensional spatial distribution characteristics of their internal pore structure, and then place the rock blocks (4) on the movable plate (2); 2) determining the experimental depth of the rock block (4) to be tested, and then starting the lifting mechanism (5) and the rotating motor (6) to lower the rock block (4) into the hole; 3) Determine the experimental temperature and reaction type of the experiment, prepare the solution required for the reaction, fill the solution into the solution tank (8), and ensure that the solution in the solution tank (8) is fully mixed through the mixing effect of the mixing mechanism (9); 4) starting the pump body (10) to introduce the solution into the liquid pipe (11), and then flowing into the borehole cavity of the rock block (4), thereby realizing the simulated evolution of the rock block (4); 5) adjusting different experimental pressures of the rock block (4) by means of experimental reactions of different solution amounts in different hole depths, and achieving the evolution of the rock block (4) at different ambient temperatures by adjusting the solution temperature; 6) changing different pressures and temperatures, and simultaneously measuring the permeability data of the rock block (4) in real time, slicing the rock block (4) and performing CT scanning, and finally obtaining experimental data, and analyzing the evolution process and main controlling factors of the reservoir pores based on the results.

Images