A controllable shock wave unblocking test system and test method

Abstract

The present invention relates to a controllable shock wave unblocking test system and test method, comprising: a system body provided with a cavity, a liquid supply device connected to the cavity, an underwater shock wave generating device provided in the cavity, a sand control completion simulation device for simulating a sand control completion system, a core fixing device for fixing a core to be tested and an isolation fixing device for fixing an underwater shock wave generating device, a core fixing device and an underwater shock wave generating device, and a shock wave control device connected to the underwater shock wave generating device; the core fixing device comprises a first casing and a plurality of through pipes penetrating and extending through a preset length of the side wall of the first casing, and the core to be tested can be fixed in the through pipes; the underwater shock wave generating device is arranged at the center of the first casing; and the sand control completion simulation device is arranged between the first casing and the underwater shock wave generating device. The implementation of the present invention can effectively reveal the controllable shock wave unblocking effect from the perspective of guiding production operations.

Description

Technical Field

[0001] The invention relates to petroleum and natural gas engineering, and more particularly to a controllable shock wave unblocking test system and a test method. Background Art

[0002] During the entire process of well construction, completion and oilfield development, physical, chemical or biological changes will occur inside the reservoir due to changes and interactions of internal or external factors, causing blockage of reservoir seepage channels and reduced production capacity.

[0003] The most common and important sources of blockage are foreign solids, inorganic scale, organic scale, polymers, emulsification, water lock, bacteria, wetting reversal and clay damage. In the laboratory, dynamic or static damage evaluation experiments are often used to evaluate the comprehensive damage of the working fluid to the oil and gas layer (including the damage of the liquid phase, solid phase and additives to the oil and gas layer). The cores used in the experiment are mostly 25mm and 38mm plunger samples.

[0004] The main reservoir unblocking measures include acid unblocking, high-energy gas pressure cracking, hydraulic shock unblocking, hydraulic rotary jet unblocking, sterilization unblocking, shock wave unblocking, etc. The acid unblocking effect evaluation experiment simulates the contamination of outcrop cores, real formation cores or artificial cores by working fluid, and then carries out acid displacement, and evaluates the unblocking effect by comparing the changes in core permeability before and after acidization.

[0005] However, the effect evaluation experiment of physical unblocking methods (high-energy gas pressure cracking, hydraulic shock unblocking, hydraulic rotary jet unblocking, shock wave unblocking, etc.) faces many difficulties. 1. Although artificial cores can simulate actual reservoirs well in terms of permeability, porosity and water sensitivity, the mechanical properties of artificial cores cannot simulate actual reservoirs. The technical principles of physical unblocking methods are similar, both of which apply pressure to the near-wellbore area and formation to dredge the liquid flow channel, increase the permeability of the formation, and remove the blockage of the formation near the wellbore. Limited by the fact that the mechanical property indicators of artificial cores are lower than those of formation cores, the use of contaminated artificial cores to evaluate the physical unblocking effect is more likely to produce cracks and increase pores, and it is impossible to objectively evaluate the unblocking effect of physical methods. Similarly, the sand filling model cannot objectively evaluate the unblocking effect. 2. The methods for evaluating the unblocking effect of controllable shock waves are mainly numerical simulation and indoor simulation experiments. The numerical simulation method is not yet perfect in theory in terms of intermittent repeated action and effect evolution, and the simulation of shock wave unblocking needs to be corrected in combination with experiments. At present, indoor simulation experiments mostly use small energy unblocking parameters to conduct unblocking experiments on a contaminated rock sample in a single direction. Although the test results can verify that this method can unblock the reservoir, in the actual wellbore, after the shock wave is emitted from the generator, it passes through the liquid, screen, and casing in the wellbore in the radial direction to cause energy attenuation before it can act on the reservoir. Indoor simulation experiments cannot accurately evaluate the unblocking effect of the shock wave after the energy attenuation of the screen and casing, cannot evaluate the energy distribution of the shock energy in different directions in the same radial direction, cannot evaluate the unblocking effect of the shock wave on the cores in different directions in the radial direction, cannot evaluate the effective unblocking distance of the shock energy along the axial direction, and cannot scientifically use the experimental results to guide the selection of shaped charge bombs for different types of blockages and the formulation of the number of operational impacts. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a controllable shock wave unblocking test system and a test method for the above-mentioned partial defects of the prior art.

[0007] The technical solution adopted by the present invention to solve the technical problem is to construct a controllable shock wave unblocking test system, comprising:

[0008] A system body provided with a cavity, a liquid supply device conductively connected to the cavity, an underwater shock wave generating device for generating shock waves arranged in the cavity, a sand control completion simulation device for simulating a sand control completion system, a core fixing device for fixing a core to be tested, and an isolation fixing device for fixing the underwater shock wave generating device, the core fixing device and the underwater shock wave generating device, and a shock wave control device connected to the underwater shock wave generating device;

[0009] The core fixing device comprises a first casing and a plurality of through tubes penetrating and extending out of the side wall of the first casing by a preset length, and the core to be tested can be fixed in the through tubes;

[0010] The shock wave underwater generating device is arranged at the center of the first casing;

[0011] The sand control completion simulation device is arranged between the first casing and the underwater shock wave generating device along the axial direction of the first casing.

[0012] Preferably, the plurality of through pipes are evenly distributed on the side wall of the first sleeve, and / or the through pipes are vertically arranged to the side wall of the first sleeve.

[0013] Preferably, the plurality of through pipes include a plurality of through pipe rings arranged along the axial direction of the first sleeve side wall and sequentially spaced at a first distance, and each through pipe ring includes a plurality of through pipes arranged along the first sleeve side wall and sequentially spaced at a first circumferential angle.

[0014] Preferably, adjacent through-pipe rings are arranged in a staggered manner.

[0015] Preferably, the first distance is 100 mm, and / or the first circumferential angle is 45 degrees.

[0016] Preferably, the first circumferential angles in adjacent through-tube rings are staggered by 22.5 degrees.

[0017] Preferably, the shock wave generating window of the underwater shock wave generating device is aligned with a first preset through-pipe ring among the plurality of through-pipe rings along the radial direction of the first casing.

[0018] Preferably, the plurality of through-pipe rings include an odd number of through-pipe rings, and the first preset through-pipe ring is a through-pipe ring at a middle position among the odd number of through-pipe rings.

[0019] Preferably, the odd number of through-pipe rings includes 9 through-pipe rings.

[0020] Preferably, it also includes a pressure monitoring device arranged in the cavity for detecting the shock wave energy information, and a data acquisition device connected to the pressure monitoring device; the pressure monitoring device is arranged on the inner side wall of the first casing and corresponds to the through pipe according to a preset rule.

[0021] Preferably, the pressure monitoring device comprises a plurality of first pressure testers arranged around the inner wall of the first casing and in the same radial plane of the first casing; and / or a plurality of second pressure testers arranged on the inner wall of the first casing in an axially aligned manner along the first casing.

[0022] Preferably, the plurality of first pressure testers are on the same diameter plane as second preset through-pipe rings among the plurality of through-pipe rings; and / or the plurality of second pressure testers are respectively on the same diameter plane as a plurality of through-pipe rings equidistantly spaced among the plurality of through-pipe rings.

[0023] Preferably, the second preset through-pipe ring is aligned with the shock wave generating window of the shock wave underwater generating device along the radial direction of the first casing; and / or, the first pressure tester is arranged at the middle position of adjacent through-pipes in the second preset through-pipe ring.

[0024] Preferably, the end face radius of the through tube at one end close to the underwater shock wave generating device is smaller than that of the end away from the underwater shock wave generating device, and a fixing element for fixing the core to be tested may be provided on the inner side of the end of the through tube away from the underwater shock wave generating device.

[0025] Preferably, the fixing element comprises a bolt and a gasket, and a thread corresponding to the bolt is provided on the inner side of one end of the through pipe away from the through pipe and away from the underwater shock wave generating device, and / or

[0026] The fixing element includes a core sleeve or a rubber ring.

[0027] Preferably, a plurality of holes are provided on the side wall of the first sleeve, and the through pipe passes through the holes and is welded to the first sleeve.

[0028] Preferably, the sand control completion simulation device includes a second casing with holes on the side wall and a screen pipe arranged on the inner side of the second casing, the screen pipe is a bridge-type composite screen pipe, and the shock wave underwater generating device is arranged at the center position of the screen pipe; the top and bottom of the second casing and the screen pipe are respectively fixed to the isolation fixing device.

[0029] Preferably, the core fixing device further comprises a lifting component provided on the first casing; and / or

[0030] The liquid supply device comprises a liquid storage tank for providing liquid, and a switch connected to the liquid storage tank;

[0031] and / or

[0032] The shock wave control device comprises a trigger, a capacitor, a transformer and a high-voltage power supply which are connected in cascade in sequence.

[0033] Preferably, the lifting member comprises at least one lifting eye.

[0034] Preferably, the cavity is a cylindrical cavity, and the liquid supply device is conductively connected to the top of the cylindrical cavity.

[0035] The present invention also constructs a controllable shock wave unblocking test method, using any of the controllable shock wave unblocking test systems described above, comprising:

[0036] S1, placing the core to be tested in a preset through pipe, and controlling the underwater shock wave generating device to output energy to generate shock waves according to a first preset rule;

[0037] S2, obtaining the porosity and permeability parameters of the tested core after the test;

[0038] S3. Obtain the porosity parameter change information to obtain corresponding setting parameters of the underwater shock wave generating device according to the change information.

[0039] Preferably, the method comprises:

[0040] S11, placing a plurality of the cores to be tested in a plurality of first through pipes corresponding to the through pipe rings on the same plane as the shock wave generating window of the shock wave underwater generating device, and controlling the shock wave underwater generating device to generate a shock wave with a first preset output energy;

[0041] and / or

[0042] S12, placing a plurality of the cores to be tested in a plurality of the second through tubes aligned with each other along the axial direction of the first casing, and controlling the underwater shock wave generating device to generate a shock wave with a second preset output energy;

[0043] and / or

[0044] S13, the rock cores to be tested include a plurality of different types of rock cores to be tested, and the plurality of the different types of rock cores to be tested are placed in the third through pipes corresponding to at least two adjacent through pipe rings in the same order, wherein the rock cores to be tested of different types are arranged adjacent to each other, and the rock cores to be tested of the same type are arranged symmetrically, and the underwater shock wave generating device is controlled to generate corresponding shock waves with a plurality of third preset output energies of different values;

[0045] and / or

[0046] S14, placing a number of the rock cores to be tested in a plurality of fourth through pipes corresponding to a first through pipe ring and an adjacent second through pipe ring which are in the same plane as the shock wave generating window of the shock wave underwater generating device, controlling the shock wave underwater generating device to generate a number of corresponding shock waves with a fourth preset output energy of a preset value, and taking out a certain number of the rock cores to be tested from the first through pipe ring and the second through pipe ring respectively after each preset number of times, until the rock cores to be tested are completely taken out.

[0047] Preferably, the method further comprises:

[0048] S21, obtaining pressure monitoring data of a pressure tester corresponding to the through pipe and respectively corresponding to the output energy.

[0049] Preferably, the step S21 includes:

[0050] S211, obtaining first monitoring pressures corresponding to a plurality of first through pipes corresponding to the through pipe ring in the same plane as the shock wave generating window of the shock wave underwater generating device; and / or

[0051] S212: Obtain second monitoring pressures corresponding to a plurality of second through tubes aligned with each other along the axial direction of the first sleeve.

[0052] The controllable shock wave unblocking test system and test method implemented in the present invention have the following beneficial effects: simulating the wellbore operating environment, which conforms to the actual conditions of the oil well, and the experimental results of the test system can effectively guide the production operation and reveal the controllable shock wave unblocking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0054] Figure 1 It is a structural schematic diagram of a controllable shock wave unblocking test system of the present invention;

[0055] Figure 2 It is a partial structural schematic diagram of an embodiment of a controllable shock wave unblocking test system of the present invention;

[0056] Figure 3 It is a top view of the local structure of an embodiment of a controllable shock wave unblocking test system of the present invention;

[0057] Figure 4 It is a partial structural schematic diagram of another embodiment of a controllable shock wave unblocking test system of the present invention;

[0058] Figure 5 It is a top view of the local structure of another embodiment of a controllable shock wave unblocking test system of the present invention;

[0059] Figure 6 It is a partial structural schematic diagram of another embodiment of a controllable shock wave unblocking test system of the present invention;

[0060] Figure 7 It is a flow chart of an embodiment of a controllable shock wave unblocking test method of the present invention;

[0061] Figure 8 , Fig. 9 This is a comparison diagram of parameters before and after the experiment of an embodiment of a controllable shock wave unblocking test method of the present invention;

[0062] Fig.10 , Fig.11 This is a comparison diagram of parameters before and after the experiment of another embodiment of a controllable shock wave unblocking test method of the present invention;

[0063] Fig.12 , Fig.13 This is a comparison diagram of parameters before and after the experiment of another embodiment of a controllable shock wave unblocking test method of the present invention;

[0064] Fig.14 , Fig.15 This is a comparison diagram of parameters before and after the experiment of another embodiment of a controllable shock wave unblocking test method of the present invention;

[0065] Fig.16 , Fig.17 This is a comparison diagram of parameters before and after the experiment of another embodiment of a controllable shock wave unblocking test method of the present invention;

[0066] Fig.18 , Fig.19 This is a comparison diagram of parameters before and after the experiment of another embodiment of a controllable shock wave unblocking test method of the present invention. DETAILED DESCRIPTION

[0067] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0068] like Figure 1 , Figure 2 and Figure 3As shown, in a first embodiment of a controllable shock wave plugging removal test system of the present invention, the system comprises: a system body 10 provided with a cavity, a liquid supply device 20 connected to the cavity, an underwater shock wave generating device 430 for generating shock waves provided in the cavity, a sand control completion simulation device for simulating a sand control completion system, a core fixing device 110 for fixing a core to be tested, and an isolation fixing device for fixing the underwater shock wave generating device 430, and a core fixing device 110 and the underwater shock wave generating device 430. 131, 132, and a shock wave control device 410 connected to the shock wave underwater generating device 430; the core fixing device 110 includes a first casing 111 and a plurality of through pipes 112 that penetrate and extend out of the side wall of the first casing 111 by a preset length, and the core to be tested can be fixed in the through pipes 112; the shock wave underwater generating device 430 is arranged at the center of the first casing 111; the sand control completion simulation device is arranged between the first casing 111 and the shock wave underwater generating device 430 along the axial direction of the first casing 111. Specifically, a structure with a cavity is adopted, a sand control completion simulation device simulating a sand control completion system is arranged in the cavity structure, and liquid such as water is injected into the cavity through a liquid supply device 20 to simulate the real wellbore environment of the production well, and a core fixing device 110 is arranged outside the sand control completion simulation device to fix the core, so that the environment of the core in the test system is similar to that in the real wellbore environment. When the core to be tested is fixed on the core fixing device 110, the shock wave control device 410 disposed outside the cavity can be used to control the shock wave underwater generating device 430 placed in the cavity to generate shock waves. The core to be tested is affected by the energy of the shock wave, and its porosity and permeability parameters will be affected. The relationship between the setting of the working parameters of the shock wave underwater generating device 430 and the unblocking effect of the core to be tested can be judged by the change of the porosity and permeability parameters of the core to be tested. The core fixing device 110 can simulate the influence of the working parameters of the shock wave underwater generating device 430 on different positions in the real wellbore environment. The core fixing device 110 is fixed and isolated by the first casing 111. The first casing 111 is provided with a plurality of through pipes 112, which are used to place the core to be tested. The through pipe 112 is reserved in a certain length in the first casing 111, for example, 2 cm. In order to ensure the uniformity of energy, the shock wave underwater generating device 430 is arranged at the center of the first casing 111 along the axial direction of the first casing 111. It can be understood that the first casing 111 is a casing with a circular cross-section, and the underwater shock wave generating device 430 is arranged at the center of the circular cross-section.

[0069] Optionally, in one embodiment, a plurality of through tubes 112 are evenly distributed on the side wall of the first sleeve 111. Specifically, the through tubes 112 are evenly arranged on the side wall of the first sleeve 111. In another embodiment, the through tubes 112 are perpendicular to the side wall of the first sleeve 111. Specifically, the through tubes 112 are perpendicular to the side wall of the first sleeve 111.

[0070] Optionally, the plurality of through-tubes 112 include a plurality of through-tube rings arranged along the axial direction of the side wall of the first sleeve 111 and spaced apart from each other by a first distance, and each through-tube ring includes a plurality of through-tubes 112 arranged along the side wall of the first sleeve 111 and spaced apart from each other by a first circumferential angle. Specifically, the through-tubes 112 are arranged in circles along the side wall of the first sleeve 111 and around the side wall of the first sleeve 111 to form a plurality of through-tube rings, and the spacing between each through-tube ring may be equal, and the spacing may be 100 mm. In some examples, other values ​​may also be used, and each through-tube ring includes a plurality of through-tubes 112, and the first circumferential angles between two adjacent through-tubes 112 in the plurality of through-tubes 112 are equal. The first circumferential angle may be 45 degrees.

[0071] Optionally, adjacent through-pipe rings are staggered. Specifically, the through-pipe rings arranged in circles are staggered, that is, the positions of two adjacent through-pipe rings are staggered, and the positions of the through-pipes 112 are staggered. The staggered circumferential angle can be half of the first circumferential angle, which is 22.5 degrees.

[0072] Optionally, in one embodiment, the shock wave generating window of the shock wave underwater generating device 430 is aligned with the first preset through-tube ring among the plurality of through-tube rings along the radial direction of the first casing 111. Specifically, the shock wave generating window of the shock wave underwater generating device 430 is at the minimum distance from the part of the through-tube 112 so that the energy received by the shock wave is maximized, and the specific setting can make the first preset through-tube ring and the shock wave generating window be on the same radial plane relative to the first casing 111.

[0073] Optionally, the plurality of pipe rings include an odd number of pipe rings, and the first preset pipe ring is a pipe ring in the middle position among the odd number of pipe rings. Specifically, in order to ensure vertical symmetry, the number of pipe rings can be set to an odd number, wherein the pipe ring in the middle position is horizontally aligned with the shock wave generating window of the underwater shock wave generating device 430. In a specific example, the odd number of pipe rings includes 9 pipe rings.

[0074] Specifically, a controllable shock wave unblocking test system of the present invention also includes a pressure monitoring device 330 disposed in the cavity for detecting shock wave energy information, and a data acquisition device 310 connected to the pressure monitoring device 330; the pressure monitoring device 330 is disposed on the inner side wall of the first casing 111, and corresponds to the through pipe 112 according to a preset rule. Specifically, the pressure monitoring device 330 and the data acquisition device 310 are connected through a data transmission cable 320. When the energy generated by the shock wave underwater generating device 430 acts on the core to be tested in the through pipe 112, the pressure generated by the shock wave underwater generating device 430 can be detected by the pressure monitoring device 330 corresponding to the position of the through pipe 112, so as to further verify the pressure effect generated by the shock wave underwater generating device 430 at the corresponding position underground, and can correspond to the porosity and permeability parameters of the core to be tested after the test, so as to achieve an accurate verification effect.

[0075] Optionally, in one embodiment, as Figure 4 and Figure 5 As shown, the pressure monitoring device 330 includes a plurality of first pressure testers arranged around the inner wall of the first casing 111 and on the same radial plane of the first casing 111; specifically, a plurality of pressure testers, namely, first pressure testers, can be arranged around the first casing 111, which are in different orientations relative to the underwater shock wave generating device 430, and can test the shock wave energy distribution of the shock wave generated by the underwater shock wave generating device 430 in different orientations.

[0076] Optional, such as Figure 6 As shown, in another example, the pressure monitoring device 330 further includes a plurality of second pressure testers arranged on the inner wall of the first casing 111 in an axially aligned manner along the first casing 111. Specifically, pressure testers, i.e., second pressure testers, are arranged at different positions on the axial direction of the shock wave generating window of the shock wave underwater generating device 430 to test the shock wave energy at different distances on the axial direction during the shock wave impact process.

[0077] Furthermore, the first pressure testers are on the same diameter plane as the second preset pipe rings among the plurality of pipe rings; specifically, in one embodiment, the first pressure testers can be arranged on the same diameter plane as any pipe ring among the plurality of pipe rings, that is, on the same horizontal plane.

[0078] Further, the plurality of second pressure testers are respectively on the same diametrical plane with a plurality of equally spaced through-tube rings among the plurality of through-tube rings. The second pressure tester can also be aligned with the through-tube 112 in the axial direction. Specifically, in order to maintain the alignment effect, it can be equally spaced with at least one through-tube ring. For example, when the spacing between the through-tube rings is 100m, the spacing between the second pressure testers can be 200m.

[0079] Optionally, the second preset through-tube ring is aligned with the shock wave generating window of the shock wave underwater generating device 430 along the radial direction of the first casing 111; specifically, on the basis of the above, the first pressure tester can be aligned with the shock wave generating window of the shock wave underwater generating device 430 along the radial direction of the first casing 111, that is, the second preset through-tube ring radially aligned with the first pressure tester corresponds to the shock wave generating window.

[0080] Optionally, the first pressure tester is arranged at the middle position of the adjacent through pipes 112 in the second preset through pipe ring. Specifically, the first pressure tester can be arranged between two through pipes 112, that is, the first pressure tester surrounds the first sleeve 111 and is evenly spaced from the through pipes 112 of the second preset through pipe ring.

[0081] Optionally, the end face radius of the through pipe 112 at one end close to the underwater shock wave generating device 430 is smaller than the end away from the underwater shock wave generating device 430, and a fixing element for fixing the core to be tested may be provided on the inner side of the end of the through pipe 112 away from the underwater shock wave generating device 430. The fixing element includes a bolt and a gasket, and a thread corresponding to the bolt is provided on the inner side of the end of the through pipe 112 away from the underwater shock wave generating device 430, and the fixing element includes a core sleeve or an apron. Specifically, the through pipe 112 in the core fixing device 110 is reduced in diameter at one end to ensure that the core cannot be taken out from this port. The inner side of the other end of the through pipe 112 is threaded and equipped with bolts and gaskets of corresponding sizes, so that the core in the through pipe 112 is not easily displaced forward and backward after the bolts are installed, and the bolts are removed after the impact, and the core is easily taken out from the through pipe 112. The other end of the through pipe 112 can also be fixed by other fixing elements. For example, a rubber ring or a sheath may be used so that after the core is covered with the rubber ring or the sheath, it is not easy for the core to move left and right in the through pipe 112 .

[0082] Optionally, a plurality of holes are provided on the side wall of the first casing 111, and the through pipe 112 is penetrated with the holes and welded to the first casing 111. Specifically, the first casing 111 is a perforated tube, and its hole diameter is equivalent to the outer diameter of the through pipe 112. The holes on the first casing 111 are uniformly distributed radially and axially. The through pipe 112 can be a tubular structure with an inner diameter of 25.5 mm and a length of 9 cm, and then pass through the holes and be welded to the first casing 111. The inner diameter setting can leave a small margin compared with the diameter of the core to be measured.

[0083] Optionally, the sand control completion simulation device includes a second casing 121 with holes on the side wall and a screen 122 arranged inside the second casing 121, the screen 122 is a bridge-type composite screen, and the shock wave underwater generating device 430 is arranged at the center of the bridge-type composite screen; the top and bottom of the second casing 121 and the screen 122 are respectively fixed to the isolation fixing devices 131 and 132. Optionally, the sand control completion simulation device simulates the real wellbore sand control pipe column, and the screen uses a bridge-type composite screen placed in the second casing 121. In one embodiment, the outer diameter of the second casing 121 is 244.5 mm, the outer diameter of the bridge-type composite screen is 159 mm, the sand blocking accuracy is 20 / 40 mesh, and the screen hole density is 110 holes / ft.

[0084] Optionally, the core fixture 110 further includes a lifting component 113 disposed on the first casing 111; in one embodiment, the lifting component 113 includes at least one lifting lug. Specifically, the lifting component 113, such as a lifting lug, is used to facilitate the removal and placement of the core fixture 110. In one embodiment, the controllable shock wave unblocking test system of the present invention further includes other auxiliary systems including a power system and a lifting system. The power system provides power support for the experiment, and the lifting system provides equipment lifting services for the experiment.

[0085] Optionally, the liquid supply device 20 includes a liquid storage tank 220 for providing liquid, and a switch 210 connected to the liquid storage tank 220; specifically, the liquid storage tank 220 can be understood as a special barrel for experiments, which is connected to a water source through a water pipeline, and a switch 210 is provided on the water pipeline to control the amount of water added.

[0086] Optionally, the shock wave control device 410 includes a trigger 411, a capacitor 412, a transformer 413 and a high-voltage power supply 414 connected in cascade in sequence. Specifically, the shock wave underwater generating device 430 is an underwater generating system, which is controlled by a ground control system, i.e., the shock wave control device 410, and the ground control system includes a high-voltage power supply 414, a transformer 413, a capacitor 412, and a trigger 411, which are connected in sequence through a cable 420 and connected to the underwater generating system. The underwater generating system includes a generating system fixing device, an energy controller, and an energy converter.

[0087] Optionally, the cavity is a cylindrical cavity, and the liquid supply device 20 is conductively connected to the top of the cylindrical cavity. Specifically, the liquid supply device 20 supplies liquid from the top of the cavity.

[0088] The structure of the core fixing device 110 is described in detail. Figure 2As shown, the core fixing device 110 is composed of three parts, namely, the first casing 111, the through pipe 112, and the lifting lug. The through pipe 112 can pass through the holes on the first casing 111 and be fixed to the first casing 111 by welding. Under the action of the first casing 111, the axial distance between the inner end faces of all through pipes 112 and the underwater shock wave generating device 430 is equal. The inner end face of the through pipe 112 is provided with a small diameter change to prevent the core from sliding inward before and after the impact. The inner side of the outer end face of the through pipe 112 is threaded and equipped with bolts and gaskets of corresponding size. The diameter surface of the through pipe 112 on the same horizontal plane as the underwater shock wave generating device 430 is R0, and the diameter surfaces are R1, R2, R3, and R4 every 100 mm upwards, and R-1, R-2, R-3, and R-4 every 100 mm downwards. The naming rule of each through pipe 112 is diameter surface-serial number. The serial numbers of each through pipe 112 on the same axial parallel line on all diameter surfaces are consistent. Because the adjacent diameter surface through pipes 112 differ by 22.5°, the serial numbers of each through pipe 112 on the R-2, R0, R2, and R4 diameter surfaces are consistent with the R-4 diameter surface on the same axial parallel line, and the R-3, R-1, and R1 are consistent with the R3 diameter surface on the same axial parallel line. The top view of the core fixing device 110 is shown in FIG. Figure 3 shown.

[0089] In addition, such as Figure 7 As shown, a controllable shock wave unblocking test method of the present invention uses any of the controllable shock wave unblocking test systems above, including:

[0090] S1, placing the core to be tested in the preset through pipe 112, and controlling the underwater shock wave generating device 430 to output energy and generate shock waves according to a first preset rule;

[0091] S2, obtaining the porosity and permeability parameters of the core to be tested after the test;

[0092] S3. Obtain porosity parameter change information to obtain corresponding setting parameters of the underwater shock wave generating device 430 according to the change information.

[0093] Specifically, when the core to be tested is fixed on the core fixing device 110, the shock wave control device 410 disposed outside the cavity can control the shock wave underwater generating device 430 placed in the cavity to generate shock waves. The core to be tested is affected by the energy of the shock wave, and its porosity and permeability parameters will be affected. The relationship between the setting of the working parameters of the shock wave underwater generating device 430 and the deblocking effect of the core to be tested can be judged by the change in the porosity and permeability parameters of the core to be tested.

[0094] Optionally, a controllable shock wave unblocking test method of the present invention includes:

[0095] S11. Place a number of cores to be tested in a number of first through pipes corresponding to the through pipe rings on the same plane as the shock wave generating window of the shock wave underwater generating device 430, and control the shock wave underwater generating device 430 to generate a shock wave with a first preset output energy; specifically, it can be tested whether the deblocking effect of the shock wave on the cores to be tested is consistent in the same plane and different directions.

[0096] Optionally, in another embodiment, a controllable shock wave unblocking test method of the present invention includes S12, placing a number of cores to be tested in a number of second through pipes aligned with each other along the axial direction of the first casing 111, and controlling the shock wave underwater generating device 430 to generate a shock wave with a second preset output energy; specifically, monitoring the changes in porosity and permeability of the contaminated core after the force of the shock wave impacts the contaminated core at different axial distances, and evaluating the effective unblocking range of the impact energy along the axial direction.

[0097] Optionally, a controllable shock wave unblocking test method of the present invention includes: S13, the core to be tested includes a plurality of different types of cores to be tested, and the plurality of different types of cores to be tested are placed in the third through pipes corresponding to at least two adjacent through pipe rings in the same order, wherein the cores to be tested of different types are arranged adjacent to each other, and the cores to be tested of the same type are arranged symmetrically, and the underwater shock wave generating device 430 is controlled to generate corresponding shock waves with a plurality of third preset output energies of different values; specifically, the cores of the same pollution type are evenly placed in the through pipe 112 on the same horizontal plane as the shock wave generating window, and a shaped charge bomb with an output energy of N1 is used for one impact, and the change of the core pore permeability after the impact is tested; a shaped charge bomb with an output energy of N2 is used for one impact, and the change of the core pore permeability after the impact is tested... A shaped charge bomb with an output energy of Nn is used for one impact, and the change of the core pore permeability after the impact is tested. According to the changes in the porosity and permeability of the contaminated cores after impact, the best shaped bombs for removing plugging from foreign solid phase pollution, the best shaped bombs for removing plugging from inorganic scale contaminated cores, the best shaped bombs for removing plugging from organic scale contaminated cores, the best shaped bombs for removing plugging from polymer contaminated cores, and the best shaped bombs for removing plugging from emulsion contaminated cores are determined in turn. The cores of a certain type of pollution are impacted with the shaped bombs with the best plugging removal effect, and the changes in the porosity and permeability of the cores after impact are tested after impacting 3, 6, 9, and 12 times respectively. The plugging removal experiments of cores blocked by different reasons are carried out by using shaped bombs with different output energies, and the plugging removal effects of shaped bombs with different energies on different cores are analyzed, providing a basis for optimizing the plugging removal shaped bombs for different blockages.

[0098] Optionally, a controllable shock wave unblocking test method of the present invention includes: S14, placing a number of cores to be tested in a plurality of fourth through-tubes corresponding to a first through-tube ring and an adjacent second through-tube ring in the same plane as the shock wave generating window of the shock wave underwater generating device 430, controlling the shock wave underwater generating device 430 to generate a number of corresponding shock waves with a fourth preset output energy of a preset value, and taking out a certain number of cores to be tested from the first through-tube ring and the second through-tube ring respectively after each preset number of intervals, until the cores to be tested are completely taken out. Specifically, through the unblocking experiment of the blocked cores with different impact times of the shaped charge bombs with the same output energy, the permeability changes of the blocked cores under different impact times are analyzed, and the relationship between the impact times and the unblocking effect is studied, providing a basis for the design of the unblocking parameters of the shaped charge bombs.

[0099] Optionally, a controllable shock wave unblocking test method of the present invention includes: S21, obtaining pressure monitoring data of a pressure tester corresponding to the through pipe 112 and corresponding to the output energy. Specifically, in the above test process, the pressure tester installed on the inner wall of the first casing 111 of the core fixing device 110 monitors the impact force received at the corresponding position.

[0100] A controllable shock wave unblocking test method of the present invention includes: S211, obtaining the first monitoring pressure corresponding to a plurality of first through pipes corresponding to the through pipe ring on the same plane as the shock wave generating window of the shock wave underwater generating device 430; specifically, arranging a pressure tester on the inner wall of the first casing 111 of the core fixing device 110 parallel to the shock wave generating window, the pressure tester is located between two adjacent through pipes 112, and the angle between adjacent pressure testers is 45 degrees, which is used to measure the shock wave energy of the shock wave at different directions on the same horizontal plane.

[0101] A controllable shock wave unblocking test method of the present invention includes S212, obtaining a second monitoring pressure corresponding to a plurality of second through pipes aligned with each other along the axial direction of the first casing 111. Specifically, pressure testers are evenly arranged on the axial direction where the inner wall of the first casing 111 of the core fixing device 110 and the shock wave generating window are directly opposite to each other, so as to measure the shock wave energy at different distances on the same axial direction.

[0102] The specific experimental process is used to illustrate. Natural outcrop cores with mechanical parameters similar to those of the formation cores are selected. The core diameter is 25.4 mm and the length is 5-8 cm. Indoor core contamination experiments are carried out. Drilling mud displacement is used to simulate reservoir damage caused by foreign solid phases, injection water that is incompatible with the reservoir fluid is used to simulate inorganic scale blockage, crude oil with high wax, asphaltene and colloid content is used to simulate organic scale blockage, polymer displacement is used to simulate polymer blockage, and emulsified crude oil displacement is used to simulate emulsion blockage, so as to obtain contaminated rock samples.

[0103] Experiment 1: Place eight solid-contaminated cores Y1, Y2, ..., Y8 with rubber rings or sheaths in eight through-tubes R0-1, R0-2, ..., R0-8 on the radial surface R0, and install a pressure monitoring device between two adjacent through-tubes, such as Figure 4 , Figure 5 As shown. The rubber ring and the sleeve only play a radial limiting role and do not generate additional force on the core. Make the end face of the contaminated core contact with the inner end of the through pipe. According to the length of the core, add a certain number of gaskets in the through pipe and install the bolts. When the core in the through pipe is at the axial upper limit and no additional force is generated on the core, stop tightening the bolts. Close the remaining through pipes without cores installed with bolts. Put the core fixture into the special barrel for the experiment. After installing the isolation device between the core fixture and the special barrel and casing, lower the shock wave underwater generating device into the experiment for impact. Read the data monitored by each pressure monitoring device, take out the cores Y1, Y2...Y8, and test the porosity and permeability of each core after impact. The porosity and permeability (corresponding porosity and permeability parameters) of the cores before and after impact are shown as follows. Figure 8 , Fig. 9 shown.

[0104] The purpose of experiment 1 is to monitor whether the force of the shock wave is consistent in the same plane and different directions, and to verify the relationship between the deblocking effect and the magnitude of the impact force through experiments. In the experiment, the cores contaminated by foreign solid phases were placed in 8 through pipes at the same level of the core fixture and the shock wave window, and the remaining through pipes were plugged with bolts. A shaped charge with an output energy of N1 was used for one impact, and the monitoring data of the pressure tester was read to test the changes in the core porosity and permeability after the impact, and to analyze the relationship between the deblocking effect of the core contaminated by foreign solid phases and the shock wave energy.

[0105] Experiment 2: Place five solid-contaminated cores Y9, Y10, ... Y13 with rubber rings or sheaths in five radial pipes R-4-1, R-2-1, R0-1, R2-1, R4-1, and install a pressure monitoring device on one side of each pipe containing a core, for a total of five pressure detection devices, such as Figure 6 As shown. After installing 5 cores, the remaining pipes without cores installed are closed with bolts. After placing the core fixing device in a special experimental barrel and installing the matching isolation device, the shock wave underwater generating device is lowered to perform shock. Read the data monitored by each pressure monitoring device, take out cores Y9, Y10...Y13, and test the porosity and permeability of each core after shock. The porosity and permeability of the cores before and after shock are shown as follows. Fig.10 , Fig.11 shown.

[0106] The purpose of experiment 2 is to monitor the impact force of the shock wave at different distances in the axial direction and the changes in the porosity and permeability of the contaminated core after the impact, understand the attenuation trend of the shock wave in the axial direction, and evaluate the effective unblocking range of the impact energy along the axial direction. In the experiment, the cores contaminated by foreign solid phase were placed in 5 through pipes along the axial direction of the core fixture, and the remaining through pipes were plugged with bolts. A shaped charge with an output energy of N1 was used for one impact, and the monitoring data of the pressure tester was read to test the changes in the porosity and permeability of the core after the impact. According to the distance of the contaminated core from the underwater shock wave generating device and the porosity and permeability change rate after the impact, the effective unblocking range of the impact energy along the axial direction was evaluated.

[0107] Experiment 3: 3 rounds were conducted. In the first round, two cores Y14 and Y15 contaminated by foreign solid phase were placed in through pipes R1-1 and R0-5 on the diameter surface of R0 and R1 with rubber rings or sheaths. Two cores W1 and W2 contaminated by inorganic scale were placed in through pipes R1-2 and R0-6 on the diameter surface of R0 and R1 with rubber rings or sheaths. Two cores U1 and U2 contaminated by organic scale were placed in through pipes R0 and R1 with rubber rings or sheaths. Place two polymer-contaminated cores J1 and J2 with rubber rings or sleeves in the through pipes R1-4 and R0-8 on the R0 and R1 diameter surfaces. Place two emulsion-contaminated cores E1 and E2 with rubber rings or sleeves in the through pipes R1-5 and R0-1 on the R0 and R1 diameter surfaces. After installing 10 cores, close the remaining through pipes without cores with bolts. Place the core fixture in a special experimental barrel and install the matching isolation device. Use 1# shaped charge bomb to carry out the impact test. Take out the cores after the impact. Test the porosity and permeability of each core after the impact. The porosity and permeability of the cores before and after the impact are as follows: Fig.12 , Fig.13 shown.

[0108] In the second round, the core placement method was the same as the first round. After the core fixture was placed in the special barrel for the experiment and the matching isolation device was installed, the 2# shaped charge bomb was used for the impact experiment. The cores were taken out after the impact and the porosity and permeability of each core were tested after the impact. The porosity and permeability of the cores before and after the impact were as follows: Fig.14 , Fig.15 shown.

[0109] In the third round, the core placement method was the same as the first round. After the core fixture was placed in the special barrel for the experiment and the matching isolation device was installed, the 3# shaped charge bomb was used for the impact experiment. The cores were taken out after the impact and the porosity and permeability of each core were tested after the impact. The porosity and permeability of the cores before and after the impact were as follows: Fig.16 , Fig.17 shown.

[0110] The purpose of experiment 3 is to conduct unblocking experiments on cores blocked by different reasons by using shaped charge bombs with different output energies, analyze the unblocking effects of shaped charge bombs with different energies on different cores, and provide a basis for optimizing unblocking shaped charge bombs for different blockages. When the impact energy is uniformly distributed along the radial direction, 5 through tubes are selected from the 8 through tubes on the same horizontal plane of the core fixture and the shock wave window, and 5 types of contaminated cores are placed in turn, and the remaining through tubes are plugged with bolts. After each shaped charge bomb with an output energy is impacted once, the core is removed for porosity and permeability analysis, and then the next round of experiments is carried out. When the impact energy is unevenly distributed along the radial direction, in the 16 through tubes on two horizontal planes close to the core fixture and the shock wave window, follow the principle of uniform distribution of cores of each contaminated type, put 2 cores of each contaminated type, a total of 10 cores, into the through tube, and the remaining empty through tubes are plugged with bolts. After each shaped charge bomb with an output energy is impacted once, the core is removed for porosity and permeability analysis, and then the next round of experiments is carried out.

[0111] Experiment 4: 12 pieces of foreign solid-contaminated cores Y20, Y25...Y31 were placed with rubber rings or sheaths in the through pipes R0-1, R0-2, R0-7, R0-8 on the R0 diameter surface and in the 8 through pipes on the R1 diameter surface, and the remaining through pipes without cores installed were closed with bolts. After placing the core fixture in a special experimental barrel and installing the matching isolation device, the best type of shaped bomb with foreign solid phase contamination was selected for impact experiment. After 3 impacts, the cores in the through pipes R1-1, R1-3, and R0-7 were taken out; after 6 impacts, the cores in the through pipes R1-2, R1-4, and R0-8 were taken out; after 9 impacts, the cores in the through pipes R1-5, R1-7, and R0-1 were taken out; after 12 impacts, the cores in the through pipes R1-6, R1-8, and R0-2 were taken out. The porosity and permeability of each core after impact were tested. The porosity and permeability of the cores before and after impact are shown in Figure 2. Fig.18 , Fig.19 shown.

[0112] The purpose of experiment 4 is to design a plugging-free experiment of a shaped charge projectile with the same output energy and different impact times on a blocked core, analyze the change in permeability of the blocked core under different impact times, study the relationship between the impact times and the plugging-free effect, and provide a basis for the design of the plugging-free parameters of the shaped charge projectile. In the experiment, a shaped charge projectile with the best plugging-free effect on external solid phase contamination was selected to impact 12 evenly distributed contaminated cores. After each impact of 3 times, 3 contaminated cores were taken out for porosity and permeability testing according to the principle of uniform distribution, and the through pipes of the removed cores were bolted until all 12 experimental cores were taken out. The changing law of the core porosity and permeability changes with the increasing impact times was analyzed.

[0113] The beneficial effects of the entire experimental device and experimental method are: a core fixing device that can realize radial and axial uniform distribution of cores, simulate the wellbore operating environment and produce different types of contaminated cores, and directly test the law of change of the shock wave force in the wellbore with the azimuth through the design of a pressure monitoring device, and further verify it through the unblocking effect; through the designed unblocking effect evaluation experimental method, the effective action distance of the shock wave unblocking in the axial direction can be evaluated according to the unblocking effect of the core in the axial direction, and the best unblocking shaped charge bombs for different types of contaminated cores can be obtained according to the unblocking effect of different energy shaped charge bombs on the cores of different contamination types, and the optimal number of impact unblocking times can be obtained according to the unblocking effect of the contaminated cores according to the number of impacts. From the perspective of conforming to the actual situation of the oil well and the experimental results can effectively guide production operations, the law of controllable shock wave unblocking, the type of blockage applicable to unblocking, and the reasonable number of unblocking operations are revealed from the monitoring data and the changes in the cores.

[0114] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. A controllable shock wave unblocking test system, characterized in that: include: A system body (10) provided with a cavity, a liquid supply device (20) conductively connected to the cavity, an underwater shock wave generating device (430) for generating shock waves arranged in the cavity, a sand control well completion simulation device for simulating a sand control well completion system, a core fixing device (110) for fixing a core to be tested, and an isolation fixing device (131, 132) for fixing the underwater shock wave generating device (430), the core fixing device (110) and the sand control well completion simulation device, and a shock wave control device (410) connected to the underwater shock wave generating device (430); The core fixing device (110) comprises a first casing (111) and a plurality of through tubes (112) penetrating through and extending out of a preset length from a side wall of the first casing (111), and the core to be tested can be fixed in the through tubes (112); The shock wave underwater generating device (430) is arranged at the center position of the first casing (111); The sand control well completion simulation device is arranged between the first casing (111) and the underwater shock wave generating device (430) along the axial direction of the first casing (111); The plurality of through tubes (112) are evenly distributed on the side wall of the first sleeve (111), and / or the through tubes (112) are arranged perpendicular to the side wall of the first sleeve (111); The sand control well completion simulation device comprises a second casing (121) having holes on its side wall and a screen tube (122) arranged inside the second casing, the screen tube being a bridge-type composite screen tube, and the shock wave underwater generating device (430) being arranged at the center of the screen tube (122); the top and bottom of the second casing (121) and the screen tube (122) are respectively fixed to the isolation fixing devices (131, 132); The plurality of through pipes (112) comprise a plurality of through pipe rings arranged in an axial direction along the side wall of the first sleeve (111) and sequentially spaced at a first distance, and each through pipe ring comprises a plurality of through pipes (112) arranged along the side wall of the first sleeve (111) and sequentially spaced at a first circumferential angle; The controllable shock wave unblocking test system further comprises a pressure monitoring device (330) disposed in the cavity and used for detecting shock wave energy information, and a data acquisition device (310) connected to the pressure monitoring device (330); the pressure monitoring device (330) is disposed on the inner side wall of the first casing (111) and corresponds to the through pipe (112) according to a preset rule.

2. The controllable shock wave unblocking test system according to claim 1, characterized in that: Adjacent through-pipe rings are arranged in a staggered manner.

3. The controllable shock wave unblocking test system according to claim 2, characterized in that: The first distance is 100 mm, and / or the first circumferential angle is 45 degrees.

4. The controllable shock wave unblocking test system according to claim 3, characterized in that: The first circumferential angles in adjacent through-tube rings are staggered by 22.5 degrees.

5. The controllable shock wave unblocking test system according to claim 1, characterized in that: The shock wave generating window of the underwater shock wave generating device (430) is aligned with a first preset through-pipe ring among the plurality of through-pipe rings along the radial direction of the first casing (111).

6. The controllable shock wave unblocking test system according to claim 5, characterized in that: The plurality of through-pipe rings include an odd number of through-pipe rings, and the first preset through-pipe ring is a through-pipe ring at a middle position among the odd number of through-pipe rings.

7. The controllable shock wave unblocking test system according to claim 6, characterized in that: The odd number of through-pipe rings includes 9 through-pipe rings.

8. The controllable shock wave unblocking test system according to claim 1, characterized in that: The pressure monitoring device (330) comprises a plurality of first pressure testers arranged around the inner wall of the first sleeve (111) and on the same radial plane of the first sleeve (111); and / or a plurality of second pressure testers arranged on the inner wall of the first sleeve (111) in an axially aligned manner along the first sleeve (111).

9. The controllable shock wave unblocking test system according to claim 8, characterized in that: The plurality of first pressure testers are on the same diameter plane as the second preset through-pipe rings among the plurality of through-pipe rings; and / or the plurality of second pressure testers are respectively on the same diameter plane as a plurality of through-pipe rings equidistantly spaced among the plurality of through-pipe rings.

10. The controllable shock wave unblocking test system according to claim 9, characterized in that: The second preset through-pipe ring is aligned with the shock wave generating window of the shock wave underwater generating device (430) along the radial direction of the first casing (111); and / or the first pressure tester is arranged at the middle position of adjacent through-pipes (112) in the second preset through-pipe ring.

11. The controllable shock wave unblocking test system according to claim 1, characterized in that: The end face radius of the through pipe (112) at one end close to the underwater shock wave generating device (430) is smaller than that of the end away from the underwater shock wave generating device (430), and a fixing element for fixing the core to be measured is arranged inside the end of the through pipe (112) away from the underwater shock wave generating device (430).

12. The controllable shock wave unblocking test system according to claim 11, characterized in that: The fixing element comprises a bolt and a gasket, and a thread corresponding to the bolt is provided on the inner side of one end of the through pipe (112) away from the underwater shock wave generating device (430), and / or The fixing element includes a core sleeve or a rubber ring.

13. The controllable shock wave unblocking test system according to claim 1, characterized in that: The side wall of the first sleeve (111) is provided with a plurality of holes, and the through pipe (112) passes through the holes and is welded to the first sleeve (111).

14. The controllable shock wave unblocking test system according to claim 1, characterized in that: The core fixing device (110) further comprises a lifting component (113) provided on the first casing (111); and / or The liquid supply device (20) comprises a liquid storage tank (220) for providing liquid, and a switch (210) connected to the liquid storage tank (220); and / or The shock wave control device (410) comprises a trigger (411), a capacitor (412), a transformer (413), and a high-voltage power supply (414) which are connected in cascade in sequence.

15. The controllable shock wave unblocking test system according to claim 14, characterized in that: The lifting component (113) comprises at least one lifting eye.

16. The controllable shock wave unblocking test system according to claim 1, characterized in that: The cavity is a cylindrical cavity, and the liquid supply device (20) is conductively connected to the top of the cylindrical cavity.

17. A controllable shock wave unblocking test method, characterized in that: The controllable shock wave unblocking test system according to any one of claims 1 to 16 comprises: S1, placing the core to be tested in a preset through pipe, and controlling the underwater shock wave generating device to output energy to generate shock waves according to a first preset rule; S2, obtaining the porosity and permeability parameters of the core to be tested after the test; S3, obtaining the porosity parameter change information, so as to obtain the corresponding setting parameters of the underwater shock wave generating device according to the change information; Wherein, step S1 comprises: S11, placing the plurality of cores to be tested in a plurality of first through pipes corresponding to the through pipe rings on the same plane as the shock wave generating window of the shock wave underwater generating device, and controlling the shock wave underwater generating device to generate a shock wave with a first preset output energy.

18. The controllable shock wave unblocking test method according to claim 17, characterized in that: The method comprises: S12, placing a plurality of the cores to be tested in a plurality of second through pipes aligned with each other along the axial direction of the first casing, and controlling the underwater shock wave generating device to generate a shock wave with a second preset output energy; and / or S13, the rock cores to be tested include a plurality of different types of rock cores to be tested, and the plurality of the different types of rock cores to be tested are placed in the third through pipes corresponding to at least two adjacent through pipe rings in the same order, wherein the rock cores to be tested of different types are arranged adjacent to each other, and the rock cores to be tested of the same type are arranged symmetrically, and the underwater shock wave generating device is controlled to generate corresponding shock waves with a plurality of third preset output energies of different values; and / or S14, placing a number of the rock cores to be tested in a plurality of fourth through pipes corresponding to a first through pipe ring and an adjacent second through pipe ring which are in the same plane as the shock wave generating window of the shock wave underwater generating device, controlling the shock wave underwater generating device to generate a number of corresponding shock waves with a fourth preset output energy of a preset value, and taking out a certain number of the rock cores to be tested from the first through pipe ring and the second through pipe ring respectively after each preset number of times, until the rock cores to be tested are completely taken out.

19. The controllable shock wave unblocking test method according to claim 18, characterized in that: S21, obtaining pressure monitoring data of a pressure tester corresponding to the through pipe and respectively corresponding to the output energy.

20. The controllable shock wave blockage removal test method according to claim 19, characterized in that: S211, obtaining first monitoring pressures corresponding to a plurality of first through pipes corresponding to the through pipe ring in the same plane as the shock wave generating window of the shock wave underwater generating device; and / or S212: Obtain second monitoring pressures corresponding to a plurality of second through tubes aligned with each other along the axial direction of the first sleeve.

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