Simulation experiment mine, configuration method of simulation experiment mine and shaft evaluation system and method

Abstract

The invention discloses a simulation experiment mine and a configuration method thereof and a shaft evaluation system and method.The simulation experiment mine comprises an experiment well, a simulation bin, a sleeve, a cement sheath and a rock mass layer, and the simulation bin is spatially located above the experiment well; the fish head is fixedly mounted at the bottom of the experiment well through a fixing screw, and the bottom of the sleeve is connected with the fish head; a gap exists between the casing pipe and the experiment well, the cement sheath is arranged around the casing pipe, and the bottom of the cement sheath is located in the gap between the casing pipe and the experiment well; the rock mass layer is arranged around the cement sheath and is arranged in the simulation bin. On the basis of simulating an experimental mine, the combined loads such as ground stress, internal pressure, stratum slippage, circulating well cementation and temperature of a to-be-studied block can be perfectly simulated through the shaft evaluation system, so that more accurate experimental data and evaluation results are provided.

Description

Technical Field

[0001] The present application belongs to the field of shaft simulation experiments, and in particular relates to a simulated experimental mine and its configuration method, and a shaft evaluation system and method. Background Art

[0002] Existing full-scale wellbore evaluation platforms, both domestically and internationally, struggle to fully replicate the true wellbore environment. Existing wellbore test platforms are unable to truly account for composite loads such as string axial force, ground stress, internal pressure, formation slippage, cyclic cementing, and temperature. The test environment for full-scale strings or wellbores still differs somewhat from actual well conditions. This results in significant discrepancies between the operating simulations of new tubing, tools, and other products developed and their actual operational results. The inability of existing test platforms to replicate the true downhole environment stems from the limitations of surface test sites, which make it impossible to replicate a true wellbore environment based on mechanical principles. Summary of the Invention

[0003] In order to overcome the above-mentioned defects in the prior art, the present application provides a simulated experimental mine and its configuration method, as well as a shaft evaluation system and method. To achieve the above-mentioned objectives, the present application provides the following technical solutions:

[0004] A simulated experimental mine comprises: an experimental well, a simulation chamber, a casing, a cement ring and a rock layer, wherein the simulation chamber is spatially located above the experimental well; the fish head is fixedly installed at the bottom of the experimental well by fixing screws, and the bottom of the casing is connected to the fish head; there is a gap between the casing and the experimental well, the cement ring is arranged around the casing, and the bottom of the cement ring is located in the gap between the casing and the experimental well; the rock layer is arranged around the cement ring, and the rock layer is arranged in the simulation chamber.

[0005] The present application also provides a configuration method for a simulated experimental mine, comprising the following steps:

[0006] Dig experimental wells and simulation chambers in the stratum;

[0007] Install the fish head and casing;

[0008] Installing a soluble tube, and injecting cement between the soluble tube and the casing to form a cement ring;

[0009] Arrange the rock layers.

[0010] Furthermore, when installing the fish head, the fish head is placed at the bottom of the experimental well and fixed with fixing screws.

[0011] Furthermore, when installing the casing, a derrick is arranged on the surface, and a top drive is installed on the top of the derrick. The casing is lowered into the experimental well by the top drive, and the casing is rotated by the top drive to connect the casing with the fish head thread.

[0012] Furthermore, when installing the soluble tube, a fixed female threaded tube is installed on the wall of the experimental well and fixed by fixing pins.

[0013] Furthermore, when injecting cement, radial holes are drilled near the bottom of the casing to circulate the cement slurry in both directions. When the cement reaches the wellhead or a preset height, the wellhead channel is pressurized and waits for solidification.

[0014] Furthermore, before arranging the rock layer, the cement is allowed to solidify, and after the cement solidifies, a solution is prepared to dissolve the soluble tube.

[0015] The present application also provides a wellbore evaluation system, which includes: a stress simulation module, a pressure simulation module and a temperature simulation module; wherein the stress simulation module, the pressure simulation module and the temperature simulation module are respectively used to simulate the horizontal ground stress, the pressure inside the casing and the temperature inside the casing in the block to be studied.

[0016] Furthermore, the stress simulation module includes: multiple hydraulic cylinders and multiple push plates, wherein the push plates are connected to the hydraulic cylinders in a one-to-one correspondence, and the push plates are installed on the output push rods of the hydraulic cylinders. The multiple hydraulic cylinders are evenly divided into four groups, and the four groups of hydraulic cylinders are equidistantly distributed around the rock layer.

[0017] Furthermore, the pressure simulation module includes: a first threaded flange, a first wellhead cap and a first fluid channel, wherein the first threaded flange is threadedly connected to the casing, the first fluid channel is arranged on the side of the first threaded flange, the first threaded flange and the first wellhead cap both have first flange sections that can be matched and connected to each other, the top of the first threaded flange is fixedly connected to the first wellhead cap through the first flange section and bolts, and a sealing ring is provided between the top of the first threaded flange and the first wellhead cap.

[0018] Furthermore, the pressure simulation module includes: a second threaded flange, an oil pipe, a transition pipe, a sealing pipe and a second wellhead cap, the second threaded flange is threadedly connected to the top of the casing, an oil pipe is inserted inside the casing, the sealing pipe is threadedly connected to the top of the oil pipe, the transition pipe is located between the second threaded flange and the sealing pipe, and the second wellhead cap is located above the sealing pipe; wherein, a second flange section that can cooperate with each other is provided between the second threaded flange and the transition pipe, and the second threaded flange and the transition pipe are fixedly connected by the second flange section and bolts; a third flange section that can cooperate with each other is provided between the transition pipe and the second wellhead cap, and the transition pipe and the second wellhead cap are fixedly connected by the third flange section and bolts, a sealing section is provided on the sealing pipe, and the sealing section is clamped between the second wellhead cap and the transition section; sealing rings are provided between the sealing section and the second wellhead cap, between the sealing section and the transition section, and between the transition section and the second threaded flange; a second fluid channel is installed on the side wall of the transition section; and a third fluid channel is installed on the second wellhead cap.

[0019] Furthermore, the temperature simulation module includes: a heating device; the heating device includes a plurality of heating hoses, and the plurality of heating hoses are evenly distributed in the rock layer for simulating the temperature of the formation around the on-site oil well.

[0020] The present application also provides a wellbore evaluation method, the method comprising the following steps:

[0021] Simulate horizontal ground stress and downhole temperature in the block to be studied;

[0022] Simulate the casing pressure in the block to be studied;

[0023] Obtain damage information on the casing surface and evaluate the service performance of the pipe body or thread;

[0024] The present application also provides a wellbore evaluation method, the method comprising the following steps:

[0025] Simulate horizontal ground stress and downhole temperature in the block to be studied;

[0026] Simulate multiple different types of ground sliding conditions;

[0027] The deformation of the casing is obtained and the cement sheath is evaluated based on the deformation.

[0028] The present application also provides a wellbore evaluation method, the method comprising the following steps:

[0029] Simulate horizontal ground stress and downhole temperature in the block to be studied;

[0030] Simulate the casing environment of the block to be studied;

[0031] Simulate the environment inside the oil pipeline in the block to be studied;

[0032] Evaluate tubing, packers and downhole tools.

[0033] The technical effects and advantages of this application are:

[0034] Based on the simulation of the experimental mine, this application can perfectly simulate the composite loads such as ground stress, internal pressure, formation slip, cyclic cementing, temperature, etc. of the block to be studied through the wellbore evaluation system to provide more accurate experimental data and evaluation results.

[0035] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures indicated in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the structure of a simulated experimental mine and shaft evaluation system;

[0037] Figure 2 A schematic diagram of assembling a shaft evaluation system in a simulated experimental mine;

[0038] Figure 3 This is one of the structural diagrams of a pressure simulation module;

[0039] Figure 4 This is the second structural diagram of a pressure simulation module;

[0040] Figure 5 This is a schematic diagram of the structure of a wellbore evaluation system;

[0041] Figure 6 This is the working principle diagram of the hydraulic cylinder when simulating non-uniform external squeezing of the formation;

[0042] Figure 7 This is the working principle diagram of the hydraulic cylinder when simulating the unidirectional outward squeezing of the formation;

[0043] Figure 8 This is the working principle diagram of the hydraulic cylinder when simulating stratum shear slip;

[0044] Figure 9 This is the working principle diagram of the hydraulic cylinder when simulating complex creep of the formation;

[0045] Figure 10 Schematic diagram of the implementation of the wellbore evaluation experiment.

[0046] In the figure: 1. casing; 2. fish head; 3. soluble tube; 4. fixed female threaded tube; 5. hydraulic cylinder; 6. push plate; 7. control terminal; 8. top drive; 9. derrick; 10. cement ring; 11. heating hose; 12. rock layer; 13. pressure sensor; 14. first fluid channel; 15. first threaded flange; 16. first wellhead cap; 17. second threaded flange; 18. sealing ring; 19. oil pipe; 20. transition pipe; 21. sealing tube; 22. second wellhead cap; 23. second fluid channel; 24. third fluid channel. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] In addition, in the invention, the terms "first", "second" and other similar words are not intended to imply any order, quantity and importance, but are merely used to distinguish different elements. The terms "upper", "lower", "left", "right" and other similar words are merely positional relationships in the drawings.

[0049] like Figure 1 As shown, an embodiment of the present application provides a simulated experimental mine, comprising: an experimental well, a simulation chamber, a casing 1, a cement ring 10 and a rock layer 12, wherein the experimental well and the simulation chamber are arranged in the stratum, and the experimental well and the simulation chamber are formed by digging in the stratum, and the simulation chamber is spatially located above the experimental well; the fish head 2 is fixedly installed at the bottom of the experimental well by fixing screws, and the bottom of the casing 1 is threadedly connected to the fish head 2; there is a gap between the casing 1 and the experimental well, and the cement ring 10 fills the gap between the casing 1 and the experimental well and extends upward to the surface, that is, the inner diameter of the cement ring 10 is equal to the outer diameter of the casing 1, the outer diameter of the cement ring 10 is equal to the diameter of the experimental well, and the height of the top of the cement ring 10 is equal to the height of the top of the simulation chamber; the rock layer 12 is arranged in the simulation chamber, and the rock layer 12 is arranged around the cement ring 10, and the height of the top of the rock layer 12 is equal to the height of the top of the cement ring 10.

[0050] Based on the above simulated experimental mine, an embodiment of the present application provides a configuration method for a simulated experimental mine, including the following steps:

[0051] Step 1: Dig a test well and a simulation chamber in the stratum;

[0052] Step 2: Install the fish head 2 and the sleeve 1;

[0053] Step 3: Install the soluble tube 3 ( Figure 2 As shown), cement is injected between the soluble tube 3 and the casing 1 to form a cement ring 10;

[0054] Step 4: Arrange the rock layer 12.

[0055] in,

[0056] In step 2, when installing the fish head 2, place the fish head 2 at the bottom of the experimental well and fix it with fixing screws;

[0057] When installing the casing 1, a derrick 9 is arranged on the surface, and a top drive 8 is installed on the top of the derrick 9. The casing 1 is lowered into the experimental well by the top drive 8, and the casing 1 is driven to rotate by the top drive 8, so that the casing 1 is threadedly connected to the fish head 2.

[0058] like Figure 2 As shown, in step 3, when installing the soluble tube 3, a fixed female threaded tube 4 is installed on the wall of the experimental well and fixed by fixing pins;

[0059] The inner diameter of the soluble tube 3 is equal to the outer diameter of the cement ring 10. The soluble tube 3 is made of a magnesium-aluminum alloy and is soluble in a certain solution formula.

[0060] When injecting cement, radial holes are drilled near the bottom of the casing 1 to circulate the cement slurry in both directions. When the cement reaches the wellhead (or the required height), the wellhead channel is pressurized and waited for solidification.

[0061] In step S4 , before arranging the rock layer 12 , it is necessary to wait for the cement to solidify. After the cement solidifies, a solution is prepared to dissolve the soluble tubes 3 .

[0062] Based on the above-mentioned simulated experimental mine, an embodiment of the present application provides a wellbore evaluation system, which includes: a stress simulation module, a pressure simulation module and a temperature simulation module; wherein,

[0063] like Figure 1 、 Figure 2 as well as Figure 5 As shown, in one embodiment of the present application, the stress simulation module includes: multiple hydraulic cylinders 5 and multiple push plates 6, wherein the push plates 6 are connected to the hydraulic cylinders 5 in a one-to-one correspondence, and the push plates 6 are installed on the output push rods of the hydraulic cylinders 5.

[0064] like Figure 5 As shown, there are multiple hydraulic cylinders 5, which are evenly divided into four groups. The four groups of hydraulic cylinders 5 are equidistantly distributed around the rock layer 12; the push plates 6 are tightly attached to the rock layer 12, and the expected movement displacement of the push plates 6 is less than the thickness of the push plates 6. The two adjacent push plates 6 fit together and are sealed with sliding seals to prevent sand and gravel from invading between the two adjacent push plates 6 or entering the hydraulic cylinders 5 during the process of the push plates 6 pushing the rock, thereby causing wear of the stress simulation module.

[0065] like Figure 5 As shown, a plurality of pressure sensors 13 are installed on the wall of the cement sheath for obtaining the pressure of the rock layer on the cement sheath 10 .

[0066] The push plate 6 is placed in contact with the rock layer 12. During the experiment, the initial ground stress σ=F / A is restored based on the thrust F of the push plate 6 and the contact area A.

[0067] like Figure 1 As shown, in one embodiment of the present application, the pressure simulation module includes: a first threaded flange 15, a first wellhead cap 16 and a first fluid channel 14, wherein the first threaded flange 15 is threadedly connected to the casing 1, the first fluid channel 14 is arranged on the side of the first threaded flange 15, the first threaded flange 15 and the first wellhead cap 16 both have first flange sections that can be matched and connected to each other, the top of the first threaded flange 15 is fixedly connected to the first wellhead cap 16 by the first flange section and bolts, and a sealing ring 18 is provided between the top of the first threaded flange 15 and the first wellhead cap 16.

[0068] like Figure 3 、 Figure 4 As shown, in one embodiment of the present application, the pressure simulation module includes: a second threaded flange 17, an oil pipe 19, a transition pipe 20, a sealing pipe 21 and a second wellhead cap 22, wherein the second threaded flange 17 is threadedly connected to the top of the casing 1, an oil pipe 19 is inserted into the casing 1, the sealing pipe 21 is threadedly connected to the top of the oil pipe 19, the transition pipe 20 is located between the second threaded flange 17 and the sealing pipe 21, and the second wellhead cap 22 is located above the sealing pipe 21; wherein, a second flange section that can cooperate with each other is provided between the second threaded flange 17 and the transition pipe 20, and the second threaded flange 17 and the transition pipe 20 are fixedly connected by the second flange section and bolts ; A third flange section that can cooperate with each other is provided between the transition pipe 20 and the second wellhead cap 22, and the transition pipe 20 and the second wellhead cap 22 are fixedly connected by the third flange section and bolts. A sealing section is provided on the sealing pipe 21, and the sealing section is clamped between the second wellhead cap 22 and the transition section; a sealing ring 18 is provided between the sealing section and the second wellhead cap 22, between the sealing section and the transition section, and between the transition section and the second threaded flange 17; a third fluid channel 24 is installed on the side wall of the transition section for injecting high-pressure fluid into the oil pipe 19 and the casing 1; a second fluid channel 23 is installed on the second wellhead cap 22 for injecting high-pressure fluid into the oil pipe 19.

[0069] like Figure 4 and Figure 5 As shown, in one embodiment of the present application, the temperature simulation module includes: a heating device; the heating device includes a plurality of heating hoses 11, and the plurality of heating hoses 11 are evenly distributed in the rock layer 12, for simulating the temperature of the formation around the on-site oil well.

[0070] In one embodiment of the present application, heating hoses 11 are also evenly distributed in the cement ring 10 .

[0071] like Figure 1 As shown, a wellbore evaluation system provided by an embodiment of the present application also includes: a control terminal 7, which is used to monitor the operating status of the stress simulation module, the pressure simulation module and the temperature simulation module and control the operation of the stress simulation module, the pressure simulation module and the temperature simulation module.

[0072] Based on the above-mentioned wellbore evaluation system, an embodiment of the present application provides a wellbore evaluation method to evaluate the service performance of a pipe body or thread in a downhole environment. The method comprises the following steps:

[0073] Step 1: Simulate the horizontal ground stress and downhole temperature of the block to be studied;

[0074] Step 2: Simulate the pressure inside casing 1 of the block to be studied;

[0075] Step 3: Obtain damage information on the surface of the casing 1 and evaluate the service performance of the pipe body or thread;

[0076] in,

[0077] In step 1, when simulating the horizontal geostress of the block to be studied, each hydraulic cylinder 5 simultaneously controls the push plate 6 to apply the actual initial maximum and minimum horizontal geostresses to the wellbore; when simulating the downhole temperature of the block to be studied, the rock layer 12 is heated by the heating hose 11, and the temperature of the rock layer 12 is transferred to the cement sheath 10 and finally to the casing 1.

[0078] In step 2, when simulating the pressure inside the casing 1 of the block to be studied, a certain high pressure or multiple rounds of alternating high pressure can be generated inside the casing according to different field conditions. Field conditions include but are not limited to pressure testing, multi-stage fracturing, and production;

[0079] While simulating the pressure inside the casing 1 of the block to be studied, the internal pressure of the casing can be obtained through the pressure sensor, and the internal pressure of the casing can be compared with the pressure value output by the pressure simulation module to evaluate the pressure leakage inside the casing 1.

[0080] In step 3, when obtaining the surface damage information of the casing 1, the cement sheath 10 is milled by the casing milling equipment, the pressure simulation module on the top of the casing 1 is removed, and the casing 1 is pulled out by the top drive 8 to obtain the surface damage information of the casing 1.

[0081] In one embodiment of the present application, in addition to evaluating the pipe body or thread through the above method, the practicality of cement slurries with different system formulations can also be evaluated through the CBL or SBT method.

[0082] Based on the above-mentioned wellbore evaluation system, an embodiment of the present application provides a wellbore evaluation method to implement a cement sheath 10 working condition evaluation test under formation slip conditions. The method comprises the following steps:

[0083] Step 1: Simulate the horizontal ground stress and downhole temperature of the block to be studied;

[0084] Step 2: Simulate multiple different types of ground slip conditions;

[0085] Step 3: Obtain the deformation of the casing 1 and evaluate the cement sheath 10 based on the deformation.

[0086] in,

[0087] In step 1, when simulating the horizontal geostress of the block to be studied, each hydraulic cylinder 5 simultaneously controls the push plate 6 to apply the actual initial maximum and minimum horizontal geostresses to the wellbore; when simulating the downhole temperature of the block to be studied, the rock layer 12 is heated by the heating hose 11, and the temperature of the rock layer 12 is transferred to the cement sheath 10 and finally to the casing 1.

[0088] like Figure 6 、 Figure 7 、 Figure 8 As shown, in step 2, when simulating multiple different types of stratum sliding conditions, on the basis of maintaining the horizontal ground stress of the block to be studied, some hydraulic cylinders 5 are controlled to continuously push the push plate 6 to simulate different stratum sliding conditions, including:

[0089] To simulate the non-uniform squeezing of the formation, start the hydraulic cylinders 5B left, 5C left, 5B right, and 5C right to continuously move toward the center of the wellbore.

[0090] To simulate unidirectional outward squeezing of the formation, start the left hydraulic cylinder 5B and the left hydraulic cylinder 5C and continuously push them toward the center of the wellbore.

[0091] To simulate formation shear slip, start hydraulic cylinder 5B left and hydraulic cylinder 5C right and continuously push them toward the center of the wellbore;

[0092] To simulate complex stratum creep, corresponding stratum displacement loads are applied according to the specific creep model of the salt-gypsum layer rock in the research block. That is, the positions and number of the hydraulic cylinders 5 to be activated are determined according to the actual situation to be simulated.

[0093] In step 3, when evaluating the cement sheath 10, a multi-arm caliper logging tool can be used to quantitatively compare and evaluate cement systems for casing deformation prevention, such as high-toughness cement systems, high-strength glass bead cement systems, and floating bead cement systems.

[0094] According to the above method, the well repair tool can also be evaluated based on the deformed casing 1. For example, different milling tools are used to mill the deformed casing 1, and the milling time is recorded to finally obtain the milling efficiency evaluation result of the tool.

[0095] like Figure 10 As shown, based on the above-mentioned wellbore evaluation system, an embodiment of the present application provides a wellbore evaluation method to implement a working condition evaluation test of the oil pipe 19, the packer, and the downhole tool; the method comprises the following steps:

[0096] Step 1: Simulate the horizontal ground stress and downhole temperature of the block to be studied;

[0097] Step 2: Simulate the environment inside the casing 1 of the block to be studied;

[0098] Step 3: Simulate the environment inside the oil pipeline 19 of the block to be studied;

[0099] Step 4: Evaluate the tubing 19, packers and downhole tools.

[0100] In step 1, when simulating the horizontal geostress of the block to be studied, each hydraulic cylinder 5 simultaneously controls the push plate 6 to apply the actual initial maximum and minimum horizontal geostresses to the wellbore; when simulating the downhole temperature of the block to be studied, the rock layer 12 is heated by the heating hose 11, and the temperature of the rock layer 12 is transferred to the cement sheath 10 and finally to the casing 1.

[0101] In step 2, when simulating the environment inside the casing 1 of the block to be studied, fluid is injected into the casing 1 through the second fluid channel 23. The properties of the annular fluid can be selected from specific media according to the working conditions. The media include but are not limited to corrosive media and rheological media. Pressurize the second fluid channel 23 to simulate the pressure, temperature, medium and other working conditions of the casing 1.

[0102] In step 3, when simulating the environment inside the oil pipe 19 of the block to be studied, fluid is injected into the oil pipe 19 through the third fluid channel 24. The properties of the fluid in the pipe can be selected from specific media according to the working conditions, and the media include but are not limited to corrosive media and rheological media; pressurize the third fluid channel 24 to simulate the pressure, temperature, medium and other working conditions inside the oil pipe 19.

[0103] In step 4, the tubing 19, the packer and the downhole tools are evaluated, including but not limited to evaluating the pressure resistance of the tubing 19, the sealing performance of the threads of the tubing 19 and / or the casing 1, and the sealing performance of the packer.

[0104] Finally, it should be noted that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A simulated experimental mine, characterized in that: include: An experimental well, a simulation chamber, a casing (1), a cement ring (10), a fish head (2), and a rock layer (12), wherein the simulation chamber is spatially located above the experimental well; the fish head (2) is fixedly installed at the bottom of the experimental well by fixing screws, and the bottom of the casing (1) is connected to the fish head (2); there is a gap between the casing (1) and the experimental well, the cement ring (10) is arranged around the casing (1), and the bottom of the cement ring (10) is located in the gap between the casing (1) and the experimental well; the rock layer (12) is arranged around the cement ring (10), and the rock layer (12) is arranged in the simulation chamber.

2. A configuration method for a simulated experimental mine, characterized in that: The following steps are involved: Dig experimental wells and simulation chambers in the stratum; Install the fish head (2) and the sleeve (1); Installing a soluble tube (3), and injecting cement between the soluble tube (3) and the casing (1) to form a cement ring (10); Arrange the rock block layer (12).

3. The configuration method of a simulated experimental mine according to claim 2, characterized in that: When installing the fish head (2), the fish head (2) is placed at the bottom of the experimental well and fixed by fixing screws.

4. The configuration method of a simulated experimental mine according to claim 2, characterized in that: When installing the casing (1), a derrick (9) is arranged on the surface, and a top drive (8) is installed on the top of the derrick (9). The casing (1) is lowered into the experimental well by the top drive (8), and the casing (1) is driven to rotate by the top drive (8), so that the casing (1) is threadedly connected to the fish head (2).

5. The configuration method of a simulated experimental mine according to claim 2, characterized in that: When installing the soluble tube (3), a fixed female threaded tube (4) is installed on the wall of the experimental well and fixed by a fixing pin.

6. The configuration method of a simulated experimental mine according to claim 2, characterized in that: When injecting cement, radial holes are drilled near the bottom of the casing (1) to circulate cement slurry in both forward and reverse directions. When the cement reaches the wellhead or a preset height, the wellhead channel is pressurized and waits for cement to solidify.

7. The configuration method of a simulated experimental mine according to claim 2, characterized in that: Before arranging the rock layer (12), wait for the cement to solidify. After the cement solidifies, prepare a solution to dissolve the soluble tube (3).

8. A wellbore evaluation system, characterized in that: The system comprises: a stress simulation module, a pressure simulation module and a temperature simulation module; wherein the stress simulation module, the pressure simulation module and the temperature simulation module are respectively used to simulate the horizontal ground stress of the block to be studied, the pressure inside the casing (1) and the temperature inside the casing (1).

9. A wellbore evaluation system according to claim 8, characterized in that: The stress simulation module comprises: a plurality of hydraulic cylinders (5) and a plurality of push plates (6), wherein the push plates (6) are connected to the hydraulic cylinders (5) in a one-to-one correspondence, and the push plates (6) are installed on the output push rods of the hydraulic cylinders (5). The plurality of hydraulic cylinders (5) are evenly divided into four groups, and the four groups of hydraulic cylinders (5) are equidistantly distributed around the rock layer (12) on a circumference.

10. A wellbore evaluation system according to claim 8, characterized in that: The pressure simulation module comprises: a first threaded flange (15), a first wellhead cap (16) and a first fluid channel (14), wherein the first threaded flange (15) is threadedly connected to the casing (1), the first fluid channel (14) is arranged on the side of the first threaded flange (15), the first threaded flange (15) and the first wellhead cap (16) both have first flange sections that can be matched and connected to each other, the top of the first threaded flange (15) and the first wellhead cap (16) are fixedly connected through the first flange section and bolts, and a sealing ring (18) is provided between the top of the first threaded flange (15) and the first wellhead cap (16).

11. A wellbore evaluation system according to claim 8, characterized in that: The pressure simulation module comprises: a second threaded flange (17), an oil pipe (19), a transition pipe (20), a sealing pipe (21) and a second wellhead cap (22), wherein the second threaded flange (17) is threadedly connected to the top of the casing (1), an oil pipe (19) is inserted into the casing (1), the sealing pipe (21) is threadedly connected to the top of the oil pipe (19), the transition pipe (20) is located between the second threaded flange (17) and the sealing pipe (21), and the second wellhead cap (22) is located above the sealing pipe (21); wherein, a second flange section that can cooperate with each other is provided between the second threaded flange (17) and the transition pipe (20), and the second threaded flange (17) and the transition pipe (20) are connected to each other. 0) are fixedly connected by a second flange section and bolts; a third flange section that can cooperate with each other is provided between the transition pipe (20) and the second wellhead cap (22); the transition pipe (20) and the second wellhead cap (22) are fixedly connected by the third flange section and bolts; a sealing section is provided on the sealing pipe (21), and the sealing section is clamped between the second wellhead cap (22) and the transition section; a sealing ring (18) is provided between the sealing section and the second wellhead cap (22), between the sealing section and the transition section, and between the transition section and the second threaded flange (17); a second fluid channel (23) is installed on the side wall of the transition section; and a third fluid channel (24) is installed on the second wellhead cap (22).

12. A wellbore evaluation system according to claim 8, characterized in that: The temperature simulation module comprises: a heating device; the heating device comprises a plurality of heating hoses (11), the plurality of heating hoses (11) are evenly distributed in a rock layer (12), and are used to simulate the temperature of the formation around the on-site oil well.

13. A wellbore evaluation method, characterized in that: The method comprises the following steps: Simulate horizontal ground stress and downhole temperature in the block to be studied; Simulate the pressure inside the casing (1) of the block to be studied; The surface damage information of the casing (1) is obtained to evaluate the service performance of the pipe body or thread.

14. A wellbore evaluation method, characterized in that: The method comprises the following steps: simulating horizontal ground stress and downhole temperature of the block to be studied; Simulate multiple different types of ground sliding conditions; The deformation amount of the casing (1) is obtained, and the cement sheath (10) is evaluated according to the deformation amount.

15. A wellbore evaluation method, characterized in that: The method comprises the following steps: Simulate horizontal ground stress and downhole temperature in the block to be studied; Simulate the environment inside the casing (1) of the block to be studied; Simulating the environment inside the oil pipeline (19) of the block to be studied; Evaluate tubing (19), packers and downhole tools.

Images