Indoor test method for realizing casing deformation of adjacent wellbores caused by natural crack slippage

Abstract

The invention relates to an indoor test method for achieving casing deformation of an adjacent wellbore caused by natural fracture slippage. The indoor test method for achieving casing deformation of the adjacent wellbore caused by natural fracture slippage comprises the following steps that a reservoir simulation sample containing the characteristics of double wellbores and natural fractures is prepared; carrying out a hydrostatic test based on the reservoir simulation sample, and dynamically monitoring various data in the experiment process to obtain experiment data; analyzing and processing the experimental data, and performing quantitative evaluation in combination with the final state of the reservoir simulation sample. The method provided by the invention can be used for quantitatively evaluating the influence caused between the adjacent wellbores on the tight reservoir rock mass under different crustal stress characteristics and fracturing process parameters. Certain technical support is provided for optimization of fracturing optimization design parameters, and the method has certain practical significance in promoting exploitation of unconventional reservoirs.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas reservoir transformation, and in particular relates to an indoor test method for realizing casing change of adjacent wellbores caused by natural fracture sliding. Background Art

[0002] Unconventional oil and gas reservoirs are generally low in porosity and permeability, making exploration and development difficult. Volumetric fracturing technology is needed to transform the reservoir to improve the conductivity of the formation in order to obtain a more economical gas flow and achieve the purpose of commercial exploitation. When fracturing the reservoir, the reservoir rock mass is damaged by shear stress, and several main fractures are formed under the action of high-pressure fluids, which communicate with natural fractures under different induction factors, so that the natural fractures continue to expand and extend to the far end, while generating a certain amount of shear slip.

[0003] The shear slip behavior of fractures is common in formations, and the relationship between advantages and disadvantages is very obvious. According to previous studies, fracture slip makes the fracture surfaces no longer match, and the conductivity will increase irreversibly, which is extremely important for improving the permeability of the reservoir; at the same time, short-distance fracture slip will cause the casing-cement sheath around the fracture to be in an uneven stress state, and when the fracture continues to extend to the far end and the fracture slip displacement is large, it will affect the casing-cement sheath of the adjacent wells, and in severe cases, it will greatly reduce the gas production and service life of the adjacent wells.

[0004] Domestic and foreign scholars have conducted a large number of numerical simulations and theoretical studies on the impact of fracture shear slip on casing-cement sheath. However, there are relatively few studies on fracture slip in the laboratory, and even fewer studies on the impact of natural fracture slip generated under fracturing conditions on the casing of adjacent wells. Summary of the invention

[0005] The purpose of the present invention is to provide an indoor test method for realizing casing deformation of adjacent wellbores caused by natural fracture sliding in order to solve the above problems.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] An indoor test method for realizing casing deformation of adjacent wellbores caused by natural fracture sliding comprises the following steps:

[0008] Prepare reservoir simulation samples containing dual wellbore and natural fracture characteristics;

[0009] Conducting a water pressure test based on the reservoir simulation sample, dynamically monitoring various data during the experiment, and obtaining experimental data;

[0010] The experimental data are analyzed and processed, and quantitatively evaluated in combination with the final state of the reservoir simulation sample.

[0011] As a further optimization scheme of the present invention, the specific process of preparing a reservoir simulation sample containing dual wellbores and natural fracture characteristics is as follows:

[0012] Arrange the first shaft: pour the first layer of concrete in the cubic mold, place a high-strength steel pipe in the middle position in a direction parallel to the ground as the first shaft, one end of the first shaft extends outside the cubic mold and is provided with a prefabricated thread, the other end of the first shaft is closed, and a hydraulic channel is opened near the bottom of the first shaft, and the perforation direction of the hydraulic channel is vertically upward;

[0013] Setting the first crack: vertically placing paper sheets as the first crack in the perforation direction perpendicular to the first shaft, placing a 45° inclined template and continuing to pour concrete into an inclined surface;

[0014] Setting the second crack: After the inclined surface is initially solidified, lay paper sheets parallel to the inclined surface as the second crack;

[0015] Arrange the second shaft: Continue pouring concrete and place the same type of high-strength steel pipe as the second shaft;

[0016] Continue pouring to complete the cube mold.

[0017] As a further optimization scheme of the present invention, the first wellbore, the second crack and the second wellbore are all provided with fiber optic sensors and optical fibers, one end of the optical fiber is connected to the light sensor, and the other end is led out of the mold; after the pouring is completed, the light source, optical fiber, fiber optic sensor, modulator and optoelectronic device are connected to build a real-time data monitoring and collection system.

[0018] As a further optimization scheme of the present invention, the material for casting is prepared by using PC52.5R composite silicate cement and 40-80 mesh quartz sand.

[0019] As a further optimization solution of the present invention, the distance between the extension line of the paper piece serving as the first crack and the intersection point of the inclined surface is not less than 50 mm.

[0020] As a further optimization scheme of the present invention, a water pressure test is carried out based on the reservoir simulation sample, and various data in the experimental process are dynamically monitored. The specific process of obtaining the experimental data is as follows:

[0021] Connecting one end of the first wellbore provided with prefabricated threads to two hydraulic fracturing pump outlet high-pressure hoses;

[0022] A true triaxial model testing machine is used to apply triaxial stress conditions to the formation, and the hydraulic fracturing pump is controlled to pump fracturing fluid at a certain displacement until the fracturing fluid pump pressure rises to reach the fracture pressure. After a penetrating fracture is formed, the fracturing fluid pumping is stopped, the triaxial ground stress of the true triaxial model testing machine is removed, and the experimental data during the experiment is obtained through a real-time data monitoring and acquisition system.

[0023] As a further optimization scheme of the present invention, the specific process of analyzing and processing the experimental data and conducting quantitative evaluation in combination with the final state of the reservoir simulation sample is as follows:

[0024] Modulating, decoding and converting the experimental data, and obtaining the strain of the optical fiber sensor at any time in the experiment under true triaxial hydraulic fracturing conditions, thereby indirectly determining whether the crack has slipped and the amount of slip and the deformation of the adjacent wellbore;

[0025] The samples were disassembled, the simulated reservoir samples were sectioned, the first wellbore and the second wellbore were removed, actual measurements were made on site, and the data were compared with the data collected and monitored by the optical fiber sensor to conduct a quantitative evaluation of the final state.

[0026] An indoor test system for realizing casing deformation of adjacent wellbores caused by natural fracture sliding, characterized by comprising:

[0027] Sample preparation module, used to prepare reservoir simulation samples containing dual wellbore and natural fracture characteristics;

[0028] A water pressure test module is used to carry out a water pressure test based on the reservoir simulation sample, dynamically monitor various data during the experiment, and obtain experimental data;

[0029] The quantitative evaluation module is used to analyze and process the experimental data and to perform quantitative evaluation in combination with the final state of the reservoir simulation sample.

[0030] An electronic device comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus;

[0031] Memory, for storing computer programs;

[0032] The processor is used to implement the indoor test method of realizing casing deformation of adjacent wellbores caused by natural fracture sliding when executing the program stored in the memory.

[0033] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the indoor test method for realizing casing deformation caused by natural fracture sliding on adjacent wellbores.

[0034] The beneficial effects of the present invention are:

[0035] The present invention can be used to quantitatively evaluate the impact between adjacent wellbores under different geostress characteristics and fracturing process parameters on tight reservoir rock. The present invention provides certain technical support for the optimization of fracturing optimization design parameters and has certain practical significance for promoting the exploitation of unconventional reservoirs. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a flow chart of the method of the present invention;

[0037] Figure 2 It is a schematic diagram of the structure of the sample of the present invention;

[0038] Figure 3 is a structural side view of a sample of the present invention;

[0039] Figure 4 It is a schematic diagram of the structure of the cast inclined crack of the sample of the present invention;

[0040] Figure 5 It is a structural block diagram of the system of the present invention;

[0041] Figure 6 It is a structural block diagram of the device of the present invention. DETAILED DESCRIPTION

[0042] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0043] like Figure 1 As shown, an indoor test method for realizing casing deformation of adjacent wellbores caused by natural fracture sliding comprises the following steps:

[0044] (1) Preparation of reservoir simulation samples with dual wellbore and natural fracture characteristics:

[0045] like Figure 2 and Figure 3 As shown in the figure, the sample used in this experiment is an artificially prepared sample, which is made of PC52.5R composite silicate cement and 40-80 mesh quartz sand. The overall size is a cube of 500mm×500mm×500mm (or 300mm×300mm×300mm, the rest of the operations are the same, and the following takes 500mm×500mm×500mm as an example), including 2 prefabricated natural fractures and 2 simulated wellbores. The fractures are prefabricated by laying paper sheets, and the simulated wellbores are made of high-strength steel pipes:

[0046] Shaft layout①: Pour the first layer of 500mm×500mm×100mm concrete in a 500mm×500mm×500mm cubic mold, place a high-strength steel pipe with a length of 270mm, an outer diameter of 20mm, and an inner diameter of 15mm in the middle parallel to the ground, pre-thread the upper casing, close the bottom, and cut a 1.5mm wide hydraulic channel near the bottom, with the perforation direction vertically upward;

[0047] Crack ①: Figure 4 As shown, a 100mm×50mm paper is placed vertically perpendicular to the wellbore perforation direction, and concrete is poured into an inclined plane, which is 45° to the wellbore. The distance between the extended line of the paper and the intersection of the inclined plane is not less than 50mm.

[0048] Crack ②: After the inclined surface is initially solidified, sand the surface of the prefabricated natural crack area with sandpaper and clean it, fix the fiber optic sensor and the optical fiber, and then lay 100mm×50mm paper sheets in parallel. Take appropriate protective measures and lead the optical fiber out of the mold. Note that the optical fiber cannot be bent or folded significantly.

[0049] Arrange shaft ②: Based on the unfinished sample mentioned above, continue to pour concrete to an overall height of 400mm, place a simulated shaft of the same type, lay fiber optic sensors along the shaft direction, and connect the optical fiber to the lead-out mold.

[0050] The unfinished samples were cast to 500mm×500mm×500mm. After they were completely solidified, they were demoulded and cured for 28 days to obtain artificial samples that were finally used for casing damage of adjacent wells caused by natural fracture slippage under true triaxial hydraulic fracturing conditions. After the samples were installed by a crane, the light source, optical fiber, optical fiber sensor, modulator, optoelectronic devices, etc. were connected to ensure no light leakage, and the monitoring system was finally arranged.

[0051] (2) Carry out a water pressure test based on the reservoir simulation sample, dynamically monitor various data during the experiment, and obtain experimental data:

[0052] Start the optical signal monitoring and conversion system for dynamic monitoring and data collection; connect the simulated casing ① prefabricated threaded end casing with the two hydraulic fracturing pump outlet high-pressure hoses, and ensure the sealing; use the true triaxial model testing machine to apply the three-dimensional stress conditions of the formation, and the servo pump pressure control system pumps the fracturing fluid according to a certain displacement until the fracturing fluid pump pressure rises to the fracture pressure and forms a through-fracture fracture. Then stop the fracturing fluid pumping system and remove the three-dimensional ground stress of the true triaxial testing machine.

[0053] (3) Analyze and process the experimental data, and conduct quantitative evaluation based on the final state of the reservoir simulation sample:

[0054] By modulating, decoding, converting and other steps of the optical signal passing through the optical fiber sensor, the strain of the optical fiber sensor at any time in the experiment can be obtained under true triaxial hydraulic fracturing conditions, thereby indirectly determining whether the natural fracture has slipped, the amount of slip, and the deformation of the adjacent wellbore.

[0055] Disassemble the sample, cut the fracturing sample, remove the simulated wellbore ① and simulated wellbore ②, conduct actual on-site measurements, and compare them with the data collected by the optical fiber sensor to conduct a quantitative evaluation of the final state;

[0056] For the above experimental operations, by controlling different experimental parameters (fracture intersection angle, triaxial stress, fracturing fluid displacement, wellbore spacing, etc.), the adjacent wells can be dynamically monitored during the experiment and the final state can be evaluated. This will provide technical support for reasonable wellbore layout, optimization of fracturing layers and optimization design of fracturing construction site parameters.

[0057] In this embodiment,

[0058] (1) The unconventional reservoir simulation sample used is an artificial sample made of cement, with an overall size of 500 mm × 500 mm × 500 mm cube;

[0059] (2) Pour the prepared concrete into a 500 mm × 500 mm × 500 mm mold. When the concrete is poured to a height of 100 mm, place a simulated wellbore with a length of 270 mm in the middle, close the bottom end, and cut a 1.5 mm wide hydraulic channel near the bottom end. The perforation direction is vertically upward.

[0060] (3) Place a 100 mm × 50 mm paper sheet (prefabricated crack ①) in the vertical direction of the simulated wellbore perforation;

[0061] (4) Make a 500 mm × 500 mm single formwork and place it on the poured concrete at a 45° angle (e.g. Figure 4 Tilt the gray area) so that the distance between the extension line of crack ① and the intersection of the formwork is 50mm; continue pouring cement until the area below the formwork is completely filled;

[0062] (5) After the initial solidification, remove the upper template, grind the crack prefabrication area of ​​the inclined surface flat, and place a 100 mm × 50 mm paper sheet (prefabricated crack ②); arrange the optical fiber sensor, connect the optical fiber, take protective measures for the sensor and the optical fiber, and lead out of the mold;

[0063] (6) Based on the above unfinished specimen, continue pouring concrete to an overall height of 400 mm and place a simulated wellbore of the same type;

[0064] (7) Arrange the optical fiber sensor in shaft ②, connect the optical fiber, take protective measures, lead it out of the sample, and continue to cast it to an overall size of 500 mm × 500 mm × 500 mm;

[0065] (8) After the sample is completely solidified, demoulded, and cured for 28 days, the preparation of the cubic sample with casing deformation caused by natural fracture slippage in the adjacent wellbore is completed for true triaxial hydraulic fracturing test;

[0066] (9) Operate the driving device to install the sample, connect the optical fiber led from the sample to the optical signal monitoring and conversion system, and start the system to collect the data monitored by the optical fiber sensor;

[0067] (10) A true triaxial model test machine is used to apply three-dimensional stress conditions to the formation and keep the three-dimensional ground stress constant; at the same time, the prefabricated threaded end of the simulated wellbore ① casing is connected to the high-pressure hose of the hydraulic fracturing pump to inject fracturing fluid, and the sealing is ensured;

[0068] (11) using a servo pump pressure control system to pump fracturing fluid at a certain displacement, and as the fracturing fluid is pumped, the pump pressure of the fracturing fluid increases to reach the fracture pressure, and after a through fracture is formed, the fracturing fluid pumping system is stopped to remove the three-dimensional ground stress of the true triaxial testing machine;

[0069] (12) By analyzing the data collected from the optical fiber sensor during the experiment, the slip amount of the crack and the deformation of the adjacent wellbore can be indirectly obtained during the experiment, and a quantitative evaluation can be made based on the actual situation of the simulated wellbore after the experiment;

[0070] Repeating steps (1) to (8) can quantitatively study the effect of the angle between natural fractures and hydraulic fractures on the adjacent wellbore during the fracturing process; at the same time, different experimental parameters can also be set for (10) and (11) to conduct research.

[0071] The present invention will use optical fiber sensors for experimental research. The basic working principle is to send light from a light source into a modulator through an optical fiber, so that the measured parameter interacts with the light entering the modulation area, causing the optical properties of the light (such as light intensity, wavelength, frequency, phase, polarization state, etc.) to change, which is called modulated signal light. The influence of the measured value on the transmission characteristics of the light is then used to complete the measurement. A true triaxial hydraulic fracturing physical simulation test system is used for experimental research. By arranging optical fiber sensors on the surface of the prefabricated fractures of the sample and the simulated casing of the adjacent well, the data of the optical fiber sensors during the fracturing process are collected in real time and transmitted to the computer memory for post-analysis basis, thereby indirectly calculating the relationship between the slip amount of the natural fracture and the deformation of the adjacent wellbore during the experiment, providing theoretical guidance for the reasonable design of the distance between wellbores and the optimization of transformation parameters.

[0072] like Figure 5As shown, an embodiment of the present disclosure provides an indoor test system for realizing casing deformation of adjacent wellbores caused by natural fracture sliding, comprising:

[0073] The sample preparation module 11 is used to prepare a reservoir simulation sample containing dual wellbore and natural fracture characteristics;

[0074] A water pressure test module 12 is used to carry out a water pressure test based on the reservoir simulation sample, dynamically monitor various data during the experiment, and obtain experimental data;

[0075] The quantitative evaluation module 13 is used to analyze and process the experimental data and to perform quantitative evaluation in combination with the final state of the reservoir simulation sample.

[0076] The implementation process of the functions and effects of each module in the above system is specifically described in the implementation process of the corresponding steps in the above method, which will not be repeated here.

[0077] For the system embodiment, since it basically corresponds to the method embodiment, the relevant parts can refer to the partial description of the method embodiment. The system embodiment described above is only schematic, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of the present invention. Those of ordinary skill in the art can understand and implement it without paying creative labor.

[0078] In the above-mentioned embodiment, any multiple of all modules can be combined in one module for implementation, or any one of the modules can be split into multiple modules. Alternatively, at least some functions of one or more of these modules can be combined with at least some functions of other modules and implemented in one module. At least one of all modules can be at least partially implemented as a hardware circuit, such as a field programmable gate array (FPGA), a programmable logic array (PLA), a system on a chip, a system on a substrate, a system on a package, an application specific integrated circuit (ASIC), or can be implemented by hardware or firmware such as any other reasonable way of integrating or packaging the circuit, or implemented in any one of the three implementation modes of software, hardware and firmware or in a suitable combination of any of them. Alternatively, at least one of all modules can be at least partially implemented as a computer program module, and when the computer program module is run, the corresponding function can be executed.

[0079] See also Figure 6, an electronic device provided by an embodiment of the present disclosure includes a processor 1110, a communication interface 1120, a memory 1130 and a communication bus 1140, wherein the processor 1110, the communication interface 1120, and the memory 1130 communicate with each other through the communication bus 1140;

[0080] Memory 1130, for storing computer programs;

[0081] The processor 1110 is used to execute the program stored in the memory 1130 to implement the indoor test method for realizing casing deformation of adjacent wellbores caused by natural fracture sliding as shown below.

[0082] The communication bus 1140 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus 1140 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0083] The communication interface 1120 is used for communication between the above electronic device and other devices.

[0084] The memory 1130 may include a random access memory (RAM) or a non-volatile memory, such as at least one disk memory. Optionally, the memory 1130 may also be at least one storage device located away from the processor 1110.

[0085] The above-mentioned processor 1110 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.

[0086] The embodiment of the present disclosure further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the indoor test method for realizing casing deformation caused by natural fracture sliding on adjacent wellbores as described above is implemented.

[0087] The computer-readable storage medium may be included in the device / apparatus described in the above embodiment; or it may exist independently without being assembled into the device / apparatus. The above computer-readable storage medium carries one or more programs. When the above one or more programs are executed, the indoor test method for realizing casing deformation of adjacent wellbores caused by natural fracture sliding according to the embodiment of the present disclosure is implemented.

[0088] According to an embodiment of the present disclosure, a computer-readable storage medium may be a non-volatile computer-readable storage medium, for example, may include but is not limited to: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, apparatus, or device.

[0089] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An indoor test method for realizing casing deformation of adjacent wellbores caused by natural fracture sliding, characterized in that: The following steps are involved: Prepare reservoir simulation samples containing dual wellbore and natural fracture characteristics; Conducting a water pressure test based on the reservoir simulation sample, dynamically monitoring various data during the experiment, and obtaining experimental data; The experimental data are analyzed and processed, and quantitatively evaluated in combination with the final state of the reservoir simulation sample.

2. The indoor test method for realizing casing deformation of adjacent wellbores due to natural fracture sliding according to claim 1, characterized in that: The specific process of preparing reservoir simulation samples with dual wellbore and natural fracture characteristics is as follows: Arrange the first shaft: pour the first layer of concrete in the cubic mold, place a high-strength steel pipe in the middle position in a direction parallel to the ground as the first shaft, one end of the first shaft extends outside the cubic mold and is provided with a prefabricated thread, the other end of the first shaft is closed, and a hydraulic channel is opened near the bottom of the first shaft, and the perforation direction of the hydraulic channel is vertically upward; Setting the first crack: vertically placing paper sheets as the first crack in the perforation direction perpendicular to the first shaft, placing a 45° inclined template and continuing to pour concrete into an inclined surface; Setting the second crack: After the inclined surface is initially solidified, lay paper sheets parallel to the inclined surface as the second crack; Arrange the second shaft: Continue pouring concrete and place the same type of high-strength steel pipe as the second shaft; Continue pouring to complete the cube mold.

3. The indoor test method for realizing casing deformation of adjacent wellbores due to natural fracture sliding according to claim 2, characterized in that: The first wellbore, the second crack and the second wellbore are all provided with fiber optic sensors and optical fibers. One end of the optical fiber is connected to the light sensor and the other end is led out of the mold. After the pouring is completed, the light source, optical fiber, fiber optic sensor, modulator and optoelectronic device are connected to build a real-time data monitoring and collection system.

4. The indoor test method for realizing casing deformation of adjacent wellbores due to natural fracture sliding according to claim 2, characterized in that: The materials used for pouring are prepared with PC52.5R composite silicate cement and 40-80 mesh quartz sand.

5. The indoor test method for realizing casing deformation of adjacent wellbores due to natural fracture sliding according to claim 2, characterized in that: The distance between the extension line of the paper piece serving as the first crack and the intersection point of the inclined surface is not less than 50 mm.

6. The indoor test method for realizing casing deformation of adjacent wellbores due to natural fracture sliding according to claim 3, characterized in that: Based on the reservoir simulation sample, a water pressure test was carried out, and various data during the experiment were dynamically monitored. The specific process of obtaining the experimental data is as follows: Connecting one end of the first wellbore provided with prefabricated threads to two hydraulic fracturing pump outlet high-pressure hoses; A true triaxial model testing machine is used to apply triaxial stress conditions to the formation, and the hydraulic fracturing pump is controlled to pump fracturing fluid at a certain displacement until the fracturing fluid pump pressure rises to reach the fracture pressure. After a penetrating fracture is formed, the fracturing fluid pumping is stopped, the triaxial ground stress of the true triaxial model testing machine is removed, and the experimental data during the experiment is obtained through a real-time data monitoring and acquisition system.

7. The indoor test method for realizing casing deformation of adjacent wellbores due to natural fracture sliding according to claim 3, characterized in that: The specific process of analyzing and processing the experimental data and conducting quantitative evaluation in combination with the final state of the reservoir simulation sample is as follows: Modulating, decoding and converting the experimental data, and obtaining the strain of the optical fiber sensor at any time in the experiment under true triaxial hydraulic fracturing conditions, thereby indirectly determining whether the crack has slipped and the amount of slip and the deformation of the adjacent wellbore; The samples were disassembled, the simulated reservoir samples were sectioned, the first wellbore and the second wellbore were removed, actual measurements were made on site, and the data were compared with the data collected and monitored by the optical fiber sensor to conduct a quantitative evaluation of the final state.

8. An indoor test system for realizing casing deformation of adjacent wellbores caused by natural fracture sliding, characterized in that: include: Sample preparation module, used to prepare reservoir simulation samples containing dual wellbore and natural fracture characteristics; A water pressure test module is used to carry out a water pressure test based on the reservoir simulation sample, dynamically monitor various data during the experiment, and obtain experimental data; The quantitative evaluation module is used to analyze and process the experimental data and to perform quantitative evaluation in combination with the final state of the reservoir simulation sample.

9. An electronic device, characterized in that: It includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; Memory, for storing computer programs; The processor is used to implement the indoor test method for realizing casing deformation of adjacent wellbores caused by natural fracture sliding as described in any one of claims 1-7 when executing the program stored in the memory.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the indoor test method for realizing casing deformation caused by natural fracture sliding on adjacent wellbores according to any one of claims 1 to 7 is implemented.

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