Fracturing fracture orientation and well pattern-well type matching optimization design method

Abstract

The invention relates to a fracturing crack orientation and well pattern-well type matching optimization design method, and belongs to the technical field of oil and gas field development. The method comprises the steps that the ground stress direction of a target block is determined, and the hydraulic fracture trend is determined; on the basis of distribution of fault block sand bodies in a target block, well patterns and well types can be optimized by using old wells and exploratory wells; constructing an optimal design formula for matching the fracture orientation with the well pattern under different well pattern types; and constructing an optimal design scheme for matching the fracture orientation and the well pattern well type under different well pattern well types, and determining the optimal matching angle of the well pattern well type and the fracture. By adopting the technical scheme provided by the invention, the development effect can be taken as a target, premature water channeling and gas channeling are avoided, the optimal matching of the fracture orientation and the well pattern-well type is realized, and the oil and gas recovery ratio is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas field development, and particularly to an optimization design method for the matching of fracture azimuth and well pattern - well type. Background Art

[0002] With the continuous growth of global energy demand and the gradual depletion of conventional oilfield resources, the exploration and development of low - permeability oil and gas have become an important development direction in the oil industry. Hydraulic fracturing is widely used in the transformation of low - permeability oil and gas reservoirs. The matching relationship between fracture azimuth and well pattern layout has an important impact on the ultimate recovery rate. If the well pattern layout is unreasonable, it will lead to the mismatch between fracture azimuth and well pattern - well type, premature water and gas channeling, reduction of oil and gas recovery rate, and increase of development cost. Therefore, achieving the best match between fracture azimuth and well pattern - well type by reasonably adjusting well positions is of great significance for the efficient development of oil reservoirs.

[0003] The invention patent with the application number 202111581397.4 proposed an optimization method for fracturing parameters of shale oil horizontal wells. First, a full - life - cycle production capacity prediction model was established. Second, the fitting prediction of the ultimate recoverable reserves of a single well was carried out. Third, an economic evaluation model of fracturing parameters was established. Finally, the sensitivity analysis of economic evaluation factors was carried out. However, this method focuses on the economic evaluation index of fracturing parameters and does not consider the influence of fracture azimuth. The invention patent with the application number 202210654943.0 disclosed an optimization method for fracturing parameters to improve the transformation effect of tight sandstone reservoirs. This method evaluates and obtains the numerical values of hydraulic fracturing of tight sandstone reservoirs on site by establishing a tight sandstone reservoir model and setting construction parameters. However, this method focuses on the formation fracture pressure value and the geometric shape of fractures and does not consider the matching relationship between fracture azimuth and well pattern. The invention patent with the application number 202211556660.9 proposed an optimization method for fracturing parameters of oil and gas horizontal wells in stages. This method obtains a box - whisker plot of fracturing parameters through reservoir numerical simulation and fracturing simulation, and optimizes parameters through the box - whisker plot of fracturing parameters. However, this technology is only applicable to the condition of a single horizontal well, focuses on the optimization of fracture half - length and conductivity, and is difficult to evaluate the matching relationship between fracture azimuth and well pattern - well type.

[0004] Therefore, there is an urgent need for an optimization design method for the matching of fracture azimuth and well pattern - well type to provide important technical support for the efficient development of oil reservoirs. Summary of the Invention

[0005] The purpose of the present invention is to provide an optimization design method for the matching of fracture azimuth and well pattern - well type to solve the problem that the fracture azimuth with the best match for different well pattern - well types is not clear.

[0006] To achieve the above purpose, the present invention provides an optimization design method for the matching of fracture azimuth and well pattern - well type, and the optimization design method includes:

[0007] S1: Determine the in-situ stress direction of the target block and clarify the trend of hydraulic fractures;

[0008] S2: Based on the distribution of fault-block sand bodies in the target block, available old wells and exploration wells, optimize the well pattern and well type;

[0009] S3: Construct an optimized design plan for the matching of fracture azimuth and well pattern and well type under different well patterns and well types, and determine the best matching angle between the well pattern and well type and the fracture.

[0010] Optionally, the step S1 includes:

[0011] S101: Take samples from the target reservoir and prepare standardized cylindrical cores;

[0012] S102: Conduct triaxial compression experiments on the standardized cylindrical cores;

[0013] S103: Observe the deformation of the standardized cylindrical cores and judge the in-situ stress direction.

[0014] Optionally, the step S2 uses the specified single-well production capacity method to determine the well pattern density.

[0015] Optionally, when using the specified single-well production capacity method, the calculation method of well pattern density is:

[0016]

[0017] In the formula, V o —— Oil production rate, %;

[0018] N—— Geological reserves, 10 4 t;

[0019] A—— Oil-bearing area, km 2 ;

[0020] q o —— Specified single-well production capacity, t / d;

[0021] η o —— Comprehensive utilization rate of oil wells, f;

[0022] R oi —— Ratio of the number of oil wells to the total number of wells, f;

[0023] S—— Well pattern density, well / km 2 。

[0024] Optionally, in the step S2, when the sand body distribution is relatively uniform and the fault block is large, a relatively large well spacing can be used to control the entire fault-block sand body; if the sand body distribution is relatively complex and scattered, a denser well pattern form can be adopted.

[0025] Optionally, step S3 includes

[0026] According to the target reservoir characteristics, using numerical simulation methods, construct numerical simulation models under different well patterns - well types, evaluate the development effects under different well patterns - well types, and optimize the included angle between the fracture and the injection - production well row.

[0027] Optionally, step S3 includes

[0028] For the staggered line - drive well pattern, the aligned line - drive well pattern, the rectangular nine - spot reverse pattern, the rhombic nine - spot reverse pattern, and the horizontal well line - drive well pattern, the fracture azimuth is parallel to the injection - production well row;

[0029] For the horizontal well five - spot reverse pattern, the fracture azimuth forms a 45° angle with the horizontal wellbore;

[0030] For the seven - spot reverse pattern and the rectangular nine - spot reverse pattern, the calculation formula for the optimal fracture angle is:

[0031] θ = - 22.5L / B + 45

[0032] For the rhombic nine - spot reverse pattern, the calculation formula for the optimal fracture angle is:

[0033] θ = - 45L / B + 45

[0034] In the formula, θ is the optimal fracture angle, L is the well spacing; B is the row spacing.

[0035] Optionally, it further includes step S4:

[0036] According to the actual situation of the reservoir, set a fine - tuning scheme for the fracture azimuth, and optimize the best fracture azimuth in combination with the cumulative oil production.

[0037] Optionally, step S4 includes:

[0038] S401: According to the in - homogeneous distribution of the reservoir, generate several fine - tuning schemes for the matching angles between the well pattern and the fracture azimuth;

[0039] S402: Construct a non - homogeneous model of the target block, and use numerical simulation methods to predict the cumulative oil production corresponding to several fine - tuning schemes;

[0040] S403: Select the fine - tuning scheme with the largest cumulative oil production and determine the best matching angle between the well pattern and the fracture azimuth.

[0041] According to the second aspect provided by the present invention, there is provided an optimization design system for the matching of fracture azimuth and well pattern - well type. The optimization design system includes:

[0042] A formation stress direction determination module, which is used to determine the formation stress direction of the target block and clarify the hydraulic fracture trend;

[0043] Well pattern and well type optimization module, which optimizes the well pattern and well type based on the fault block sand body distribution, available old wells and exploration wells in the target block;

[0044] Fracture azimuth optimization module, which constructs an optimization design scheme for the matching of fracture azimuth and well pattern and well type under different well patterns and well types, and determines the best matching angle between the well pattern and well type and the fracture.

[0045] According to the third aspect provided by the present invention, there is provided an information data processing terminal, which includes a memory and a processor. The memory stores a computer program. When the computer program is executed by the processor, the processor is caused to execute the optimization design method for the matching of hydraulic fracture azimuth and well pattern - well type.

[0046] According to the fourth aspect provided by the present invention, there is provided a computer - readable storage medium storing a computer program. When the computer program is executed by a processor, the processor is caused to execute the optimization design method for the matching of hydraulic fracture azimuth and well pattern - well type.

[0047] The present invention provides an optimization method, system, terminal, and storage medium for the matching of hydraulic fracture azimuth and well pattern - well type, which realizes the optimization design of the fracture azimuth and different well patterns - well types, and has the technical effect of improving the oil and gas recovery rate compared with the prior art. Brief Description of the Drawings

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0049] Figure 1 It is a schematic flow chart of the method of the present invention;

[0050] Figure 2 It is a schematic diagram of the in - situ stress distribution in the embodiment of the present invention;

[0051] Figure 3 It is the original well - fracture layout plan in the embodiment of the present invention;

[0052] Figure 4 It is a schematic diagram of a row - type well pattern;

[0053] Figure 5 It is a schematic diagram of an area well pattern;

[0054] Figure 6 It is the oil recovery degree curve and water cut curve at different fracture angles of a vertical well row - type well pattern in the embodiment of the present invention;

[0055] Figure 7 This is the production degree curve at different fracture angles in the vertical well area well pattern in the embodiment of the present invention;

[0056] Figure 8 This is the well pattern combination with different injection-production ratios in the embodiment of the present invention;

[0057] Figure 9 This is the optimized well placement and fracture placement scheme diagram in the implementation of the present invention. Specific Embodiments

[0058] The following will describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining and understanding the present invention, and are not used to limit the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0059] As Figure 1 shown, the present invention provides an optimized design method for matching the fracture azimuth with the well pattern - well type. Specifically in implementation, the optimization design method includes the following steps:

[0060] S1: Determine the in - situ stress direction of the target block and clarify the hydraulic fracture orientation;

[0061] S2: Based on the distribution of fault - block sand bodies in the target block, available old wells and exploration wells, optimize the well pattern and well type;

[0062] S3: Construct an optimized design scheme for matching the fracture azimuth with the well pattern and well type under different well patterns and well types, and determine the best matching angle between the well pattern - well type and the fracture.

[0063] Optionally, the methods for determining the in - situ stress direction include but are not limited to "triaxial rock mechanics compression experiment", "microseismic monitoring", "paleomagnetic orientation experiment", "wave velocity anisotropy experiment", "dipole array acoustic wave", "borehole wall collapse", etc.

[0064] In a specific embodiment, the step S1 includes the following sub - steps:

[0065] S101: Take samples from the target reservoir and prepare standardized cylindrical cores;

[0066] It should be noted that in this step, the two end faces of the core need to be polished to ensure that the end faces are flat and in good contact with the experimental device.

[0067] S102: Conduct a triaxial compression experiment on the standardized cylindrical core;

[0068] Specifically, install the standardized cylindrical core in a triaxial loading device to ensure that the axial stress direction of the sample is aligned with the device; seal the core sample to prevent confining pressure leakage during the test; apply a uniform confining pressure to the core to simulate the formation pressure of the reservoir; gradually increase the axial stress while maintaining the confining pressure constant; record the deformation of the core, including axial deformation and lateral expansion; use an acoustic emission monitoring system to record the time and direction of crack initiation; calculate the failure stress values of the rock, including compressive strength, elastic modulus, and Poisson's ratio.

[0069] S103: Observe the deformation of the standardized cylindrical core and determine the in-situ stress direction.

[0070] Specifically, determine the maximum horizontal stress direction of the reservoir according to the relationship between the crack direction and the loading direction; comprehensively analyze the magnitudes and directions of the three principal in-situ stress values; in addition, crack observation can also be carried out on the fractured core, and three-dimensional crack distribution information can be obtained using X-ray CT scanning or optical microscopy to verify the relationship between the crack initiation plane and the maximum horizontal stress direction.

[0071] Optionally, step S2 includes the following sub-steps:

[0072] S201: Calculate the reasonable well pattern density using reservoir engineering methods, where reservoir engineering methods include but are not limited to the "specified single-well production method", "reasonable oil production rate method", "injection-production balance method", "reasonable well pattern density", etc.

[0073] In a specific embodiment, the specified single-well production method is used to determine the well pattern density. The specified single-well production method calculates the number of oil wells required for the oilfield based on the single-well production of oil wells in the study area, combined with parameters such as geological reserves, oil production rate, oil-bearing area, and the proportion of oil wells, and then obtains the reasonable well pattern density. The calculation formula is as follows:

[0074]

[0075] In the formula, V o —— Oil production rate (%); N—— Geological reserves (10 4 t); A—— Oil-bearing area (km 2 ); q o —— Specified single-well production (t / d); η o —— Comprehensive utilization rate of oil wells (f); R oi —— Ratio of the number of oil wells to the total number of wells (f); S—— Well pattern density (well / km 2 ).

[0076] S202: Based on the fault-block sandbody distribution, available old wells, and exploration wells in the target block, optimize the well pattern and well type.

[0077] In this step, the lateral and longitudinal distribution of sand bodies in the target block is understood through methods such as geological exploration, seismic data, and core analysis. If the sand body distribution is relatively concentrated and uniform, a relatively large well spacing is adopted; if the sand body distribution is relatively complex and scattered, a denser well pattern is adopted to ensure coverage of all oil and gas enrichment areas.

[0078] Optionally, through the production history of old wells (such as production rate, water cut, pressure data, etc.), the development effect and oil and gas distribution of the oil and gas field can be analyzed, providing a basis for the layout of new wells; data such as the hydraulic fracturing effect, fracture propagation direction and size of old wells helps to understand the fracture propagation pattern, and then optimize the fracturing design and well pattern layout of new wells; the matching effect of old wells with different development methods such as water flooding and gas flooding can help to judge the advantages and disadvantages of the existing well pattern and guide the well pattern optimization. Exploration wells provide preliminary geological data, including cores, logging, pressure testing, etc., providing basic information support for well pattern layout; the oil-water interface data of exploration wells helps to evaluate the efficiency of water flooding or gas flooding, and exploration wells can help to identify the sweet spots of the reservoir, thus guiding the well pattern layout. According to the fracture propagation direction and reservoir heterogeneity, well positions are preferably arranged in the sweet spot area and avoid areas with poor physical properties or high water breakthrough risk to ensure coverage of the sweet spot area.

[0079] Optionally, step S3 includes the following sub-steps:

[0080] S301: Based on the characteristics of the target reservoir, use numerical simulation methods to construct numerical simulation models under different well pattern-well type conditions, conduct numerical simulation studies, evaluate the development effects under different well pattern-well types, and optimize the included angle between fractures and injection-production well rows.

[0081] Specifically, a numerical simulation model of the reservoir is established considering various mechanisms such as non-linear seepage, matrix stress sensitivity, and fracture dynamic closure according to the actual situation of the reservoir.

[0082] Optionally, vertical well patterns include but are not limited to "line drive well pattern", "area well pattern", "irregular well pattern", etc.; horizontal well patterns include but are not limited to "line drive well pattern" and "inverted five-spot well pattern", etc.

[0083] Optionally, vertical well line drive well patterns include but are not limited to "direct line drive well pattern", "staggered line drive well pattern", "square five-spot well pattern", etc.; vertical well area well patterns include but are not limited to "rectangular inverted nine-spot well pattern", "rhombic inverted nine-spot well pattern", "inverted seven-spot well pattern", etc.

[0084] S302: According to the characteristics of different well pattern types, construct a general optimization design formula for the matching of fracture azimuth and well pattern.

[0085] For the staggered well pattern in rows, the directly opposite well pattern in rows, the rectangular inverted nine-spot, the rhombic inverted nine-spot, and the horizontal well pattern in rows, the fracture azimuth is parallel to the injection-production well rows, and the development effect is the best;

[0086] For the horizontal well inverted five-spot pattern, the fracture azimuth is at 45° to the horizontal wellbore, and the development effect is the best;

[0087] For the inverted seven-spot, the rectangular inverted nine-spot, and the rhombic inverted nine-spot, there is a certain included angle between the fracture azimuth and the injection-production well rows, which can avoid premature water breakthrough;

[0088] Among them, the calculation formula for the optimal fracture angle of the inverted seven-spot and the rectangular inverted nine-spot is:

[0089] θ = -22.5L / B + 45

[0090] The calculation formula for the optimal fracture angle of the rhombic inverted nine-spot is:

[0091] θ = -45L / B + 45

[0092] In the formula, θ——optimal fracture angle; L——well spacing; B——row spacing.

[0093] Table 1 shows the corresponding specific design schemes in the above optimization design scheme.

[0094] Table 1 Recommended table for the matching of fracture azimuth and well pattern under different well types and well patterns

[0095]

[0096] Furthermore, after determining the optimal matching angle based on the homogeneous reservoir in step S3, it further includes step S4:

[0097] Based on the inhomogeneous distribution of the actual reservoir, the optimal fracture azimuth is selected by combining the cumulative oil production. In steps S1 - S3, the reservoir is assumed to be a homogeneous model, but in reality, it is mostly an inhomogeneous model. Therefore, the optimized scheme can be further fine-tuned by combining the inhomogeneous distribution of the reservoir.

[0098] After determining the optimal matching angle between the well pattern and the fracture according to the above steps S1 - S3, on the premise of fixing the fracture direction, the well pattern is calculated by rotating at multiple angles, and the control situation of the well pattern on the physical property sweet spots of the reservoir is gradually analyzed to further optimize the well pattern layout scheme in a fine-tuning manner.

[0099] When setting the new well positions, on the one hand, the new wells should maintain an appropriate well spacing from the old wells to avoid well interference caused by an overly dense well pattern. On the other hand, the layout of the new wells should ensure the balanced development of the entire reservoir area and avoid over-concentration in a certain oil and gas enrichment area. After determining the optimal matching angle, the most suitable angle between the well pattern and the fracture direction can be further optimized by fine-tuning to determine the recommended positions of the new wells after optimization.

[0100] Example 1

[0101] The actual application of a low-permeability reservoir in a certain block is used to illustrate the specific application and advantages of the present invention.

[0102] S1: Determine the in-situ stress direction of the target block and clarify the trend of hydraulic fractures.

[0103] Relying on the triaxial rock mechanics experimental device, a total of triaxial rock mechanics tests were carried out to determine the horizontal maximum and minimum principal stresses of the experimental core. It was found that single shear fractures were generally formed in the reservoir core under triaxial test conditions. At the same time, combined with the data results of downhole logging instruments and microseismic monitoring on site, the azimuths of the maximum and minimum principal stresses of the target block were clarified as Figure 2 shown.

[0104] S2: Based on the distribution of fault-block sand bodies, available old wells and exploration wells in the target block, optimize the well pattern and well type.

[0105] Based on the target block, the oil-bearing area is 0.72 km 2 , the geological reserves are 7200×10 4 t, the oil production rate is 0.02%, the specified single-well production capacity is 30 t / d, the comprehensive utilization rate of oil wells is 1, and the ratio of the number of oil wells to the total number of wells is 0.5. According to the above single-well production capacity method, the well pattern density is calculated to be 0.96 well / km 2 .

[0106] According to geological exploration and seismic data, fault blocks in the target block are developed and the sand body area is evenly distributed. A relatively large well spacing is adopted. As Figure 3 the established well pattern combination, the old wells have a relatively high oil production and the development effect is relatively good. According to the fault-block distribution, the well pattern covers a relatively large area, and a row-shaped staggered well pattern is preferably adopted.

[0107] S3: Construct an optimized design scheme for the matching of fracture azimuth and well pattern / well type under different well patterns / well types, and determine the best matching angle between the well pattern / well type and the fracture.

[0108] Numerical simulations were carried out on different well pattern combinations in this block. Each row-shaped well pattern form is as Figure 4 shown, each area well pattern form is as Figure 5 shown, the production degree curve and water cut curve of the straight well row-shaped well pattern at different fracture angles are as Figure 6 shown, the production degree curve of the straight well area well pattern at different fracture angles is as Figure 7 shown, and the optimal fracture angles are obtained respectively.

[0109] Numerical simulations were carried out on different horizontal well well pattern combinations, and different injection-production ratio well pattern combinations were set as Figure 8As shown, it can be seen that the horizontal well line drive pattern has a high recovery factor, a large number of individual wells, and a rapid water cut increase; when horizontal wells are used as injection well rows, the displacement is more balanced. However, considering the drilling cost, vertical well injection is recommended.

[0110] According to the numerical simulation results, based on the optimal recommended azimuth or the fitted recommended scheme of each well pattern shown in Table 1, and using the determined well pattern and fracture angle, the optimal angle setting scheme can be calculated.

[0111] S4: Based on the heterogeneous distribution of the actual reservoir, the best fracture azimuth is optimized by combining the cumulative oil production. Generate several fine-tuning schemes for the matching angles between the well pattern and the fracture azimuth; use the numerical simulation method to predict the cumulative oil production corresponding to the several fine-tuning schemes; select the fine-tuning scheme with the largest cumulative oil production, and give the best matching angle between the well pattern and the fracture azimuth. The final well and fracture layout scheme is as Figure 9 shown.

[0112] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and the practice disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

[0113] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure should be limited by the appended claims.

Claims

1. A method for optimizing the design of the matching between hydraulic fracture azimuth and well pattern - well type, the optimization design method comprising: S1: Determine the in - situ stress direction of the target block and clarify the trend of hydraulic fractures; S2: Based on the distribution of fault - block sand bodies in the target block, available old wells and exploration wells, optimize the well pattern and well type; S3: Construct an optimization design scheme for the matching between fracture azimuth and well pattern - well type under different well patterns and well types, and determine the best matching angle between the well pattern - well type and the fracture.

2. The method for optimizing the design of the matching between hydraulic fracture azimuth and well pattern - well type according to claim 1, wherein the step S1 comprises: S101: Take samples from the target reservoir and prepare standardized cylindrical cores; S102: Conduct tri - axial compression experiments on the standardized cylindrical cores; S103: Observe the deformation of the standardized cylindrical cores and judge the in - situ stress direction.

3. The method for optimizing the design of the matching between hydraulic fracture azimuth and well pattern - well type according to claim 1, wherein the step S2 uses the specified single - well productivity method to determine the well pattern density.

4. The method for calculating the well pattern density when using the specified single - well productivity method in the method for optimizing the design of the matching between hydraulic fracture azimuth and well pattern - well type according to claim 3 is: where V o — oil production rate, %; N — Geological reserves, 10 4 t; A - oil-bearing area, km 2 ; q o —— Specify the single well production capacity, t / d; η o —— Overall utilization rate of oil wells, f; R oi —— ratio of the number of oil wells to the total number of wells, f; S - Well pattern density, well / km 2 。 5. The method for optimizing the design of the matching between hydraulic fracture azimuth and well pattern - well type according to claim 1, when the sand body is evenly distributed and the fault - block is large in the step S2, use a large well spacing to control the entire fault - block sand body; if the sand body distribution is complex and scattered, use a dense well pattern form.

6. The method for optimizing the design of the matching between hydraulic fracture azimuth and well pattern - well type according to claim 1, the step S3 comprises For the staggered row well pattern, the facing row well pattern, the rectangular inverted nine - spot, the rhombic inverted nine - spot, and the horizontal well row well pattern, the fracture azimuth is parallel to the injection - production well row; For the horizontal well inverted five - spot well pattern, the fracture azimuth is at 45° to the horizontal wellbore; For the inverted seven - spot and rectangular inverted nine - spot well patterns, the calculation formula for the optimal fracture angle is: θ = - 22.5L / B + 45 For the rhombic inverted nine - spot well pattern, the calculation formula for the optimal fracture angle is: θ = - 45L / B + 45 Wherein, θ is the optimal fracture angle, L is the well spacing; B is the row spacing.

7. The method for optimizing the design of the matching between hydraulic fracture azimuth and well pattern - well type according to claim 1, further comprising the step S4: Set a fine - tuning scheme for the fracture azimuth according to the actual situation of the reservoir, and optimize the best fracture azimuth in combination with the cumulative oil production.

8. A system for optimizing the design of the matching between hydraulic fracture azimuth and well pattern - well type, the optimization design system comprising: An in - situ stress direction determination module for determining the in - situ stress direction of the target block and clarifying the trend of hydraulic fractures; A well pattern - well type optimization module for optimizing the well pattern and well type based on the distribution of fault - block sand bodies in the target block, available old wells and exploration wells; A fracture azimuth optimization module for constructing an optimization design scheme for the matching between fracture azimuth and well pattern - well type under different well patterns and well types, and determining the best matching angle between the well pattern - well type and the fracture.

9. An information data processing terminal, the information data processing terminal includes a memory and a processor, the memory stores a computer program, when the computer program is executed by the processor, the processor is caused to execute the optimized design method for matching the fracture azimuth with the well pattern - well type according to any one of claims 1 - 7.

10. A computer - readable storage medium stores a computer program, when the computer program is executed by a processor, the processor is caused to execute the optimized design method for matching the fracture azimuth with the well pattern - well type according to any one of claims 1 - 7.

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