Rock mechanical parameter spatial anisotropy characterization method, system, equipment and medium

Abstract

The invention provides a rock mechanical parameter spatial anisotropy characterization method, system, equipment and medium, and the method comprises the following steps: marking a marker line for a collected rock core, and establishing a spatial position relation between the rock core and a geodetic coordinate system; the method comprises the following steps: processing and explaining imaging logging of a core coring well to obtain the magnitude and orientation of crustal stress, and determining bedding, cracks or crustal stress orientation; determining a spatial geometrical relationship between the marker line on the rock core and bedding, crack or ground stress orientation; determining the position of the marker line and the horizontal plane, placing the rock core on the marked horizontal plane, and determining the position of the space drilling to obtain a rock sample; carrying out a triaxial rock mechanics experiment on the drilled rock sample to obtain rock mechanics three-dimensional anisotropy; according to the invention, mechanical experiments carried out by rock samples in different orientations can be reduced, and basic parameters can be rapidly and accurately provided.

Description

Technical Field

[0001] The present invention belongs to the field of oil and gas field exploration and development, and specifically relates to a method, system, equipment and medium for characterizing spatial anisotropy of rock mechanics parameters. Background Art

[0002] Rock mechanics parameters, including rock Poisson's ratio, rock strength parameters, various elastic moduli, internal friction angle and cohesion, are important basic data for paleostress field simulation, current geostress simulation, prediction of dynamic and static parameters of fractures, and reservoir injection pressure. Rocks develop foliation and bedding during their development, and the size and combination of mineral particles in rocks will cause the orientation of the structure and structure, resulting in the anisotropy of rock mechanics parameters in space.

[0003] In the field of oil and gas reservoir geomechanics, accurate characterization of the spatial anisotropy of rock mechanical parameters plays an important role in fracturing construction design, wellbore stability analysis, etc. Usually, the study of the spatial anisotropy of rock mechanical parameters is generally obtained by conducting mechanical experiments or ultrasonic tests on rock samples in different orientations. This process requires a large number of experimental samples and is time-consuming and labor-intensive. It is also difficult to accurately characterize the spatial anisotropy of rock mechanical parameters and is difficult to meet the actual production and construction needs. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a method, system, equipment and medium for characterizing the spatial anisotropy of rock mechanics parameters, which can simply, quickly and accurately characterize the spatial anisotropy of rock mechanics parameters.

[0005] The present invention is achieved through the following technical solutions:

[0006] The method for characterizing the spatial anisotropy of rock mechanics parameters includes the following steps:

[0007] Mark the collected cores with landmarks and establish the spatial position relationship between the cores and the geodetic coordinate system;

[0008] By processing and interpreting the imaging logging of the core well, the magnitude and orientation of the ground stress can be obtained, and the bedding, fractures or ground stress orientation can be determined;

[0009] Determine the spatial geometric relationship between the marker line on the core and the bedding, fracture or ground stress orientation;

[0010] Determine the orientation of the marking line and the horizontal plane, place the core on the marked horizontal plane, determine the spatial drilling orientation, and obtain the rock sample;

[0011] The drilled rock samples were subjected to triaxial rock mechanics experiments to obtain the three-dimensional anisotropy of rock mechanics.

[0012] Furthermore, the process of marking the collected core with a marker line and establishing the spatial position relationship between the core and the earth coordinate system is as follows:

[0013] Establish a geodetic coordinate system for the true occurrence of bedding and fractures, define the inclination of the geological body as α, the azimuth of the geological body as β, define O-ENV as the geodetic coordinate system, where the OV axis is the vertical direction, the ON axis is the due north direction, the OE axis is the due east direction, and the plane where O-CEN is located is the horizontal plane; define O-FDA as the core coordinate system, make the origins of the two coordinate systems coincide at point O, determine the spatial relationship between the marker line and the geological body, reposition the core geological body, determine the true occurrence of the core sampling position, and determine the direction of the marker line.

[0014] Furthermore, the process of determining the spatial geometric relationship between the marker line on the core and the bedding, fracture or ground stress orientation is as follows:

[0015] Determine the spatial geometric relationship between the marker line and the bedding, crack or ground stress orientation in the geodetic coordinate system, convert the occurrence of the bedding and cracks on the core into the real occurrence of the geodetic coordinate system, record the angle of the bedding and cracks on the core relative to the "apparent dip of the geological body" in the geodetic coordinate system as Δγ, and the "apparent dip of the rock formation" judged on the core, and obtain the apparent dip γ′ of the bedding and cracks in the wellbore coordinate system, and determine the spatial geometric relationship between the marker line on the core and the bedding, crack or ground stress orientation.

[0016] Furthermore, the process of formulating the spatial drilling orientation is as follows:

[0017] Place the geodetic coordinate system on the indoor horizontal plane, determine the spatial geometric relationship between the marking line and the horizontal plane, make the orientation of the marking line parallel to the horizontal plane, and complete the geological body relocation;

[0018] By placing the core on a marked horizontal plane, the core space drilling position is determined based on the spatial geometric relationship between the orientation of the marking line and the orientation of the bedding, fracture or ground stress, as well as the core columns of each bedding, fracture or ground stress orientation.

[0019] Furthermore, the drilling process uses a drilling machine and a slicing device to process the core, and a rock sample with a flat end surface, a diameter of 2.5 cm, and a length of 5.0 cm is taken out.

[0020] Furthermore, the process of the triaxial rock mechanics experiment is as follows:

[0021] The rock sample is placed in a high-pressure chamber and different confining pressures are applied on all sides to gradually increase the vertical stress of the rock to simulate the real three-dimensional stress environment underground. The axial and radial strain values ​​of the rock are recorded to obtain the corresponding rock stress-strain curve, the static mechanical parameters of the rock, and the distribution frequency of the static rock mechanical parameters in the study area are determined.

[0022] Furthermore, the process of obtaining the three-dimensional anisotropy of rock mechanics is as follows:

[0023] Based on triaxial rock mechanics experiments on core columns in different orientations, the static mechanical parameters of core columns in different orientations are obtained, the sizes and directions of rock mechanics parameters in different orientations are obtained, and the three-dimensional anisotropy of rock mechanics parameters is determined.

[0024] The spatial anisotropy characterization system of rock mechanics parameters includes:

[0025] The acquisition module marks the collected cores with marker lines and establishes the spatial position relationship between the cores and the geodetic coordinate system;

[0026] The processing module processes and interprets the imaging logging of the core well to obtain the magnitude and orientation of the ground stress and determine the bedding, fractures or ground stress orientation;

[0027] The annotation module determines the spatial geometric relationship between the marker line on the core and the bedding, fracture or ground stress orientation;

[0028] The drilling determination module determines the orientation of the marking line and the horizontal plane, places the core on the marked horizontal plane, determines the spatial drilling orientation, and obtains the rock sample;

[0029] The output module conducts triaxial rock mechanics experiments on the rock samples that have completed drilling to obtain the three-dimensional anisotropy of rock mechanics.

[0030] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of a method for characterizing spatial anisotropy of rock mechanical parameters are implemented.

[0031] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of a method for characterizing spatial anisotropy of rock mechanics parameters.

[0032] Compared with the prior art, the present invention has the following beneficial technical effects:

[0033] The present invention provides a method, system, equipment and medium for characterizing spatial anisotropy of rock mechanics parameters, comprising the following steps: marking a marker line on a collected rock core, establishing a spatial position relationship between the rock core and a geodetic coordinate system; processing and interpreting imaging logging of a core sampling well, obtaining the magnitude and orientation of ground stress, and determining bedding, cracks or ground stress orientation; determining the spatial geometric relationship between the marker line on the rock core and the bedding, cracks or ground stress orientation; determining the marker line orientation and a horizontal plane, placing the rock core on the marked horizontal plane, determining the spatial drilling orientation, and obtaining a rock sample; carrying out a triaxial rock mechanics experiment on the drilled rock sample, and obtaining three-dimensional anisotropy of rock mechanics; the present application can reduce mechanical experiments carried out on rock samples in different orientations, and provide fast and accurate basic parameters for engineering problems such as fracturing construction design, wellbore stability analysis, and wellbore trajectory adjustment during drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a flow chart of the method for characterizing the spatial anisotropy of rock mechanical parameters of the present invention;

[0035] Figure 2 It is a schematic diagram of horizontal projection of a geological body in an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of the calculation of the in-situ stress orientation by imaging logging in an embodiment of the present invention;

[0037] Figure 4 It is a schematic diagram of geological body relocation in an embodiment of the present invention;

[0038] Figure 5 Formulate a spatial drilling position diagram for an embodiment of the present invention;

[0039] Figure 6 is a rock stress-strain curve diagram in an embodiment of the present invention;

[0040] Figure 7 This is a three-dimensional anisotropy result diagram of rock mechanical parameters in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0042] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0043] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0044] The present invention provides a method for characterizing the spatial anisotropy of rock mechanical parameters, such as Figure 1 As shown, the following steps are included:

[0045] Mark the collected cores with landmarks, establish the geodetic coordinate system where the bedding and fractures are actually located, and establish the spatial relationship between the cores and the geodetic coordinate system;

[0046] By processing and interpreting the imaging logging of the core well, the bedding and structural fractures are identified. On the basis of the bedding and structural fractures identified by the imaging logging, the magnitude and orientation of the geostress are obtained, and the bedding, fracture or geostress orientation is determined;

[0047] Determine the spatial geometric relationship between the marker line on the core and the bedding, fracture or ground stress orientation;

[0048] Determine the orientation of the marking line and the horizontal plane based on the spatial geometric relationship, place the core on the marked horizontal plane, determine the spatial drilling orientation, and obtain the rock sample;

[0049] The drilled rock samples were subjected to triaxial rock mechanics experiments to obtain the three-dimensional anisotropy of rock mechanics.

[0050] It should be noted that in the process of processing and interpreting the imaging logging of core sampling wells to identify bedding and structural fractures, bedding and structural fractures are identified based on the resistivity or acoustic wave data processing and interpretation in the imaging logging and the differences in resistivity and acoustic wave velocity in the fracture development sections in the imaging logging.

[0051] Preferably, the process of marking the collected core with a marker line, establishing a geodetic coordinate system where the bedding and fractures are actually located, and establishing the spatial position relationship between the core and the geodetic coordinate system is as follows:

[0052] Define the inclination of the geological body as α, the azimuth of the geological body as β, define O-ENV as the geodetic coordinate system, in which the OV axis is the vertical direction, the ON axis is the due north direction, the OE axis is the due east direction, and the plane where O-CEN is located is the horizontal plane; define O-FDA as the core coordinate system, make the origins of the two coordinate systems coincide at point O, determine the spatial relationship between the marker line and the geological body, reposition the core geological body, determine the true occurrence of the core coring position, and determine the direction of the marker line.

[0053] Preferably, the process of determining the spatial geometric relationship between the marker line on the core and the bedding, fracture or in-situ stress orientation is:

[0054] Determine the spatial geometric relationship between the marker line and the bedding, crack or ground stress orientation in the geodetic coordinate system, convert the occurrence of the bedding and cracks on the core into the real occurrence of the geodetic coordinate system, record the angle of the bedding and cracks on the core relative to the "apparent dip of the geological body" in the geodetic coordinate system as Δγ, and the "apparent dip of the rock formation" judged on the core, and obtain the apparent dip γ′ of the bedding and cracks in the wellbore coordinate system, and determine the spatial geometric relationship between the marker line on the core and the bedding, crack or ground stress orientation.

[0055] Preferably, the process of formulating the spatial drilling orientation is:

[0056] Place the geodetic coordinate system on the indoor horizontal plane, determine the spatial geometric relationship between the marking line and the horizontal plane, make the orientation of the marking line parallel to the horizontal plane, and complete the geological body relocation;

[0057] By placing the core on a marked horizontal plane, the core space drilling position is determined based on the spatial geometric relationship between the orientation of the marking line and the orientation of the bedding, fracture or ground stress, as well as the core columns of each bedding, fracture or ground stress orientation.

[0058] Furthermore, the drilling process uses a drilling machine and a slicing device to process the core, and a rock sample with a flat end surface, a diameter of 2.5 cm, and a length of 5.0 cm is taken out.

[0059] Preferably, the process of the triaxial rock mechanics experiment is:

[0060] The rock sample is placed in a high-pressure chamber and different confining pressures are applied on all sides to gradually increase the vertical stress of the rock to simulate the real three-dimensional stress environment underground. The axial and radial strain values ​​of the rock are recorded to obtain the corresponding rock stress-strain curve, the static mechanical parameters of the rock, and the distribution frequency of the static rock mechanical parameters in the study area are determined.

[0061] Preferably, the process of obtaining the three-dimensional anisotropy of rock mechanics is:

[0062] Based on triaxial rock mechanics experiments on core columns in different orientations, the static mechanical parameters of core columns in different orientations are obtained, the sizes and directions of rock mechanics parameters in different orientations are obtained, and the three-dimensional anisotropy of rock mechanics parameters is determined.

[0063] Example 1

[0064] The following is an example of the Bashijiqike Formation in the Kelasu structural belt in front of the Kuche Mountains in the Tarim Basin in western China to illustrate the specific implementation process of the present invention:

[0065] Step 1: Mark the cores collected in the field with landmarks, establish the geodetic coordinate system where the bedding and fractures are actually located, and establish the spatial relationship between the cores and the geodetic coordinate system; specifically, Figure 2 As shown, the inclination of the geological body is defined as α, the azimuth of the geological body is defined as β, and O-ENV is defined as the geodetic coordinate system, in which the OV axis is the vertical direction, the ON axis is the due north direction, the OE axis is the due east direction, and the plane where O-CEN is located is the horizontal plane; O-FDA is defined as the core coordinate system, and the origins of the two coordinate systems coincide at point O, to determine the spatial relationship between the marker line and the geological body, to return the core geological body, to determine the true occurrence of the core coring position, and to determine the direction of the marker line.

[0066] Step 2: By processing and interpreting the imaging logging of the core well, the bedding and structural fractures are identified. On the basis of the bedding and structural fractures identified by the imaging logging, the magnitude and orientation of the geostress are calculated to clarify the bedding, fracture or geostress orientation. Specifically, Figure 3 As shown, the orientation of the fractures is determined by identifying the fractures in the imaging logging.

[0067] Step 3: Determine the spatial geometric relationship between the marker line and the bedding, cracks or geostress orientation in the geodetic coordinate system, convert the occurrence of the bedding and cracks on the core into the true occurrence of the geodetic coordinate system, record the angle of the bedding and cracks on the core relative to the "apparent dip of the geological body" in the geodetic coordinate system as Δγ, and the "apparent dip of the rock formation" judged on the core, and obtain the apparent dip γ′ of the bedding and cracks in the wellbore coordinate system, and determine the spatial geometric relationship between the marker line on the core and the bedding, cracks or geostress orientation.

[0068] Step 4: Place the geodetic coordinate system on the indoor horizontal plane (due north), determine the spatial geometric relationship between the marking line and the horizontal plane, make the orientation of the marking line parallel to the horizontal plane, and complete the geological body relocation. Specifically, Figure 4 As shown, through core observation, it is determined that the orientation of the fracture and the marker line is 85°, and the orientation of the marker line is determined by using the direction of the fracture in imaging logging.

[0069] Step 5: Place the core on a marked horizontal plane indoors, determine the spatial drilling position of the core on the basis of clarifying the orientation of the marking line and the spatial geometric relationship of the bedding, crack or ground stress orientation, and on the basis of ensuring that the core columns of each bedding, crack or ground stress orientation are obtained. Specifically, Figure 5 As shown, the orientation of the drill core is determined by determining the orientation of the marking line, and the core is processed using a drilling rig, slicing equipment, and other equipment to take out a rock sample with a flat end surface, a diameter of 2.5 cm, and a length of 5.0 cm.

[0070] Step 6: According to the test standard of Engineering Rock Test Method Standard (GB / T50266-99), the triaxial rock mechanics experiment is carried out on the rock sample using the Autolab1500 high temperature and high pressure rock physics test system. The rock sample is placed in a high pressure chamber, and different confining pressures are applied around it to gradually increase the vertical stress of the rock to simulate the real three-dimensional stress environment underground. The axial and radial strain values ​​of the rock are recorded to obtain the corresponding rock stress-strain curve, such as Figure 6 As shown, the static mechanical parameters of the rock are obtained and the distribution frequency of the static rock mechanical parameters in the study area is determined.

[0071] Step 7: Based on the triaxial rock mechanics experiments on core columns at different orientations, the static mechanical parameters of core columns at different orientations are determined, the magnitude and direction of the rock mechanical parameters at different orientations are obtained, and the three-dimensional anisotropy of the rock mechanical parameters is determined, such as Figure 7 shown.

[0072] The present invention provides a rock mechanics parameter spatial anisotropy characterization system, comprising:

[0073] The acquisition module is used to mark the marker lines on the collected cores, establish the geodetic coordinate system where the bedding and fractures are actually located, and establish the spatial position relationship between the cores and the geodetic coordinate system;

[0074] A processing module is used to process and interpret the imaging logging of the core well to identify the bedding and structural fractures, obtain the magnitude and orientation of the ground stress on the basis of the identification of the bedding and structural fractures by the imaging logging, and determine the bedding, fracture or ground stress orientation;

[0075] Annotation module, used to determine the spatial geometric relationship between the marker line on the core and the bedding, fracture or ground stress orientation;

[0076] The drilling determination module is used to determine the orientation of the marking line and the horizontal plane based on the spatial geometric relationship, place the core on the marked horizontal plane, determine the spatial drilling orientation, and obtain the rock sample;

[0077] The output module is used to carry out triaxial rock mechanics experiments on the rock samples after drilling to obtain the three-dimensional anisotropy of rock mechanics.

[0078] In another embodiment of the present invention, a computer device is provided, the computer device comprising a processor and a memory, the memory is used to store a computer program, the computer program comprises program instructions, and the processor is used to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc., which are the computing core and control core of the terminal, which are suitable for implementing one or more instructions, and are specifically suitable for loading and executing one or more instructions in the computer storage medium to implement the corresponding method flow or corresponding function; the processor described in the embodiment of the present invention can be used for the operation of the spatial anisotropy characterization method of rock mechanics parameters.

[0079] In another embodiment of the present invention, the present invention also provides a storage medium, specifically a computer-readable storage medium (Memory), which is a memory device in a computer device for storing programs and data. It is understandable that the computer-readable storage medium here can include both the built-in storage medium in the computer device and the extended storage medium supported by the computer device. The computer-readable storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the corresponding steps of the spatial anisotropy characterization method of rock mechanical parameter in the above embodiment.

[0080] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0081] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0082] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0083] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for characterizing spatial anisotropy of rock mechanics parameters, characterized in that: The following steps are involved: Mark the collected cores with landmarks and establish the spatial position relationship between the cores and the geodetic coordinate system; By processing and interpreting the imaging logging of the core well, the magnitude and orientation of the ground stress can be obtained, and the bedding, fractures or ground stress orientation can be determined; Determine the spatial geometric relationship between the marker line on the core and the bedding, fracture or ground stress orientation; Determine the orientation of the marking line and the horizontal plane, place the core on the marked horizontal plane, determine the spatial drilling orientation, and obtain the rock sample; The drilled rock samples were subjected to triaxial rock mechanics experiments to obtain the three-dimensional anisotropy of rock mechanics.

2. The method for characterizing spatial anisotropy of rock mechanics parameters according to claim 1, characterized in that: The process of marking the collected cores with marker lines and establishing the spatial position relationship between the cores and the geodetic coordinate system is as follows: Establish a geodetic coordinate system for the true occurrence of bedding and fractures, define the inclination of the geological body as α, the azimuth of the geological body as β, define O-ENV as the geodetic coordinate system, where the OV axis is the vertical direction, the ON axis is the due north direction, the OE axis is the due east direction, and the plane where O-CEN is located is the horizontal plane; define O-FDA as the core coordinate system, make the origins of the two coordinate systems coincide at point O, determine the spatial relationship between the marker line and the geological body, reposition the core geological body, determine the true occurrence of the core sampling position, and determine the direction of the marker line.

3. The method for characterizing spatial anisotropy of rock mechanics parameters according to claim 1, characterized in that: The process of determining the spatial geometric relationship between the marker line on the core and the bedding, fracture or ground stress orientation is as follows: Determine the spatial geometric relationship between the marker line and the bedding, crack or ground stress orientation in the geodetic coordinate system, convert the occurrence of the bedding and cracks on the core into the real occurrence of the geodetic coordinate system, record the angle of the bedding and cracks on the core relative to the "apparent dip of the geological body" in the geodetic coordinate system as Δγ, and the "apparent dip of the rock formation" judged on the core, and obtain the apparent dip γ′ of the bedding and cracks in the wellbore coordinate system, and determine the spatial geometric relationship between the marker line on the core and the bedding, crack or ground stress orientation.

4. The method for characterizing spatial anisotropy of rock mechanics parameters according to claim 1, characterized in that: The process of formulating the spatial drilling orientation is as follows: Place the geodetic coordinate system on the indoor horizontal plane, determine the spatial geometric relationship between the marking line and the horizontal plane, make the orientation of the marking line parallel to the horizontal plane, and complete the geological body relocation; By placing the core on a marked horizontal plane, the core spatial drilling position is determined based on the orientation of the marking line and the spatial geometric relationship between the bedding, fracture or ground stress orientation, as well as the core columns of each bedding, fracture or ground stress orientation.

5. The method for characterizing spatial anisotropy of rock mechanics parameters according to claim 4, characterized in that: The drilling process uses a drilling machine and a slicing device to process the core, and a rock sample with a flat end surface, a diameter of 2.5 cm, and a length of 5.0 cm is taken out.

6. The method for characterizing spatial anisotropy of rock mechanics parameters according to claim 1, characterized in that: The process of the triaxial rock mechanics experiment is as follows: The rock sample is placed in a high-pressure chamber and different confining pressures are applied on all sides to gradually increase the vertical stress of the rock to simulate the real three-dimensional stress environment underground. The axial and radial strain values ​​of the rock are recorded to obtain the corresponding rock stress-strain curve, the static mechanical parameters of the rock, and the distribution frequency of the static rock mechanical parameters in the study area are determined.

7. The method for characterizing spatial anisotropy of rock mechanics parameters according to claim 1, characterized in that: The process of obtaining the three-dimensional anisotropy of rock mechanics is as follows: Based on triaxial rock mechanics experiments on core columns in different orientations, the static mechanical parameters of core columns in different orientations are obtained, the sizes and directions of rock mechanics parameters in different orientations are obtained, and the three-dimensional anisotropy of rock mechanics parameters is determined.

8. The spatial anisotropy characterization system of rock mechanics parameters is characterized by: The method for characterizing the spatial anisotropy of rock mechanical parameters according to any one of claims 1 to 7 comprises: The acquisition module marks the collected cores with marker lines and establishes the spatial position relationship between the cores and the geodetic coordinate system; The processing module processes and interprets the imaging logging of the core well to obtain the magnitude and orientation of the ground stress and determine the bedding, fractures or ground stress orientation; The annotation module determines the spatial geometric relationship between the marker line on the core and the bedding, fracture or ground stress orientation; The drilling determination module determines the orientation of the marking line and the horizontal plane, places the core on the marked horizontal plane, determines the spatial drilling orientation, and obtains the rock sample; The output module conducts triaxial rock mechanics experiments on the rock samples that have completed drilling to obtain the three-dimensional anisotropy of rock mechanics.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method for characterizing the spatial anisotropy of rock mechanics parameters as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method for characterizing the spatial anisotropy of rock mechanics parameters as described in any one of claims 1 to 7 are implemented.

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